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92-24161-36-26SUPERSEDES 92-24161-36-25
INSTALLATION INSTRUCTIONSFOR UPFLOW AND DOWNFLOW/HORIZONTALHIGH
EFFICIENCY CONDENSING TWO-STAGEGAS FURNACESRGRK-12ERAJS, RGRL, AND
RGTK SERIES
ISO 9001:2008
U.L. recognized fuel gas and CO (carbon monoxide) detectors are
recommended in allapplications, and their installation should be in
accordance with the manufacturer’srecommendations and/or local
laws, rules, regulations, or customs.
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INSTALLATION CHECK LISTREFER TO INSTALLATION INSTRUCTIONS
GAS SUPPLY
______ Adequate pipe size
______ Correct supply pressure (during furnace operation)
______ Manifold pressure
______ No gas leaks
______ L.P. Kit Number (if applicable)
ELECTRICAL
______ 115 V.A.C. supply (Single Circuit)
______ Polarity observed
______ Furnace properly grounded
______ Adequate wire size
FURNACE INSTALLATION
______ Adequate clearance to combustibles
______ Adequate clearance for service (at front)
DUCT STATIC PRESSURE
______ in. w.c. on heating speed
______ in. w.c. on cooling speed
______ Air temperature rise
CONDENSATE LINE
______ Trap filled with water
______ Vented
______ Sloped toward drain
______ Condensate drain line hoses connectedand clamped
______ Freeze protection (if necessary)
VENTING – DIRECT VENT
______ in. diameter – intake pipe
______ in. diameter – exhaust pipe
______ ft. of pipe – intake air
______ no. of elbows – intake air
______ ft. of pipe – exhaust pipe
______ no. of elbows – exhaust pipe
______ Exhaust Vent Temperature
TERMINATIONS – DIRECT VENT
VERTICAL
______ Intake – 12" min. above roof/snow level
______ Correct relationship – exhaust to intake
HORIZONTAL/VERTICAL – CONCENTRIC ((-)XGY-E03A)
______ Intake – 12" min. above roof/snow level
______ Intake “Y” rotated above center
______ Exhaust sloped toward furnace
HORIZONTAL – STANDARD ((-)XGY-D02, -D03) – US((-)XGY-D02A,
(-)XGY-D03A) – CANADA
______ Correct relationship – exhaust to intake
______ 12" min. above grade/snow level
HORIZONTAL – ALTERNATE((-)XGY-D02, -D03 OR -D04) –
US((-)XGY-D02A, -D03A, -D04A) – CANADA
______ Correct relationship – exhaust to intake
______ Above anticipated snow level
VENTING – NON-DIRECT VENT
______ in. diameter – exhaust pipe
______ ft. of pipe – exhaust
______ no. of elbows
TERMINATION – NON-DIRECT VENT
VERTICAL
______ 12" min. above roof/snow level
HORIZONTAL – STANDARD
______ 12" min. above grade/snow level
HORIZONTAL – ALTERNATE
______ Above anticipated snow level
_____________________________ Model Number
_____________________________ Serial Number
_____________________________ Date of Installation
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CONTENTS
Safety Precautions
...................................................................................................1
Installation Check List
..............................................................................................2
General
Information..................................................................................................4
Safety Information
....................................................................................................6
Location Requirements and Considerations
............................................................8
Ducting
...................................................................................................................13
Venting and Combustion Air Piping
.......................................................................15
Combustion and Ventilation Air
..............................................................................17
Vent Pipe
Installation..............................................................................................20
Condensate Drain/Neutralizer
................................................................................33
Gas Supply and
Piping...........................................................................................37
Electrical
Wiring......................................................................................................42
Accessories
............................................................................................................43
Furnace
Twinning...................................................................................................44
High Altitude Installations
.......................................................................................48
Start-Up
Procedures...............................................................................................51
Air
Flow...................................................................................................................54
Maintenance...........................................................................................................57
Troubleshooting......................................................................................................59
Wiring
Diagrams.....................................................................................................62
IMPORTANT: All manufacturerproducts meet current Federal
OSHAGuidelines for safety. CaliforniaProposition 65 warnings are
requiredfor certain products, which are notcovered by the OSHA
standards.
California's Proposition 65 requireswarnings for products sold
in Californiathat contain, or produce, any of over600 listed
chemicals known to the Stateof California to cause cancer or
birthdefects such as fiberglass insulation,lead in brass, and
combustion productsfrom natural gas.
All “new equipment” shipped for sale inCalifornia will have
labels stating thatthe product contains and/or producesProposition
65 chemicals. Although wehave not changed our processes,having the
same label on all ourproducts facilitates manufacturing
andshipping. We cannot always know“when, or if” products will be
sold in theCalifornia market.
You may receive inquiries fromcustomers about chemicals found
in, orproduced by, some of our heating andair-conditioning
equipment, or found innatural gas used with some of ourproducts.
Listed below are thosechemicals and substances commonlyassociated
with similar equipment inour industry and other manufacturers.
• Glass Wool (Fiberglass) Insulation• Carbon Monoxide (CO)•
Formaldehyde• Benzene
More details are available at theWebsites for OSHA
(OccupationalSafety and Health Administration), atwww.osha.gov and
the State ofCalifornia's OEHHA (Office ofEnvironmental Health
HazardAssessment), at www.oehha.org.Consumer education is important
sincethe chemicals and substances on thelist are found in our daily
lives. Mostconsumers are aware that productspresent safety and
health risks, whenimproperly used, handled andmaintained.
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NOTE: A load calculation must beperformed to properly determine
therequired furnace BTU size for thestructure. Also, the duct must
be properlydesigned and installed for proper airflow.Existing
ductwork must be inspected forproper size and sealed system.
Properairflow is necessary for both user comfortand equipment
performance.Before opening the furnace carton andinstallation of
the furnace, verify the datatags on the carton and inside
thefurnace, match and is what was orderedfrom the local
distributor. Also, check forany damage to the furnace
beforeinstallation.IMPORTANT: Proper application,installation and
maintenance of thisfurnace and system is a must ifconsumers are to
receive the full benefitsfor which they have paid.The (-)GRK-,
(-)GRL-, (-)GTK- seriesfurnaces are design-certified by CSA foruse
with natural and propane gases asfollows:
4
1. As non-direct vent central forced airfurnaces taking
combustion air fromthe installation area or using airducted from
the outside.
2. As direct vent central forced airfurnaces with all combustion
airsupplied directly to the furnaceburners through a special air
intakesystem outlined in theseinstructions.Install this furnace
inaccordance with the AmericanNational Standard Z223.1 –
latestedition entitled “National Fuel GasCode” (NFPA54) and
requirementsor codes of the local utilities orother authorities
having jurisdiction.This is available from the following:National
Fire Protection Association, Inc.Batterymarch ParkQuincy, MA
02269CSA-INTERNATIONAL8501 East Pleasant Valley RoadCleveland, Ohio
44131-5575
GENERAL INFORMATION
FIGURE 1UPFLOW FURNACE COMPONENTS
ITEMNO. PART NAME1 CONDENSATE TRAP2 DOOR SWITCH3 JUNCTION BOX4
TRANSFORMER5 PRESSURE SWITCHES6 EXHAUST TRANSITION7 CONNECTOR8
OUTLET AIR PIPE
9 SHIPPING PLUG (TO BE REMOVED)10 FLAME SENSOR11 OVERTEMPERATURE
SWITCH12 TOP PLATE13 BURNER14 IGNITER15 COMBUSTION AIR INLET16
OPTIONAL AIR INLET (UPFLOW UNITS ONLY)17 OPTIONAL GAS INLET18 GAS
VALVE
19 INDUCED DRAFT BLOWER20 CAPACITORS21 BLOWER22 LOW VOLTAGE
TERMINAL23 CONTROL MOUNTING PLATE24 FILTER / SOLID METAL BASEPLATE
(UPFLOWUNITS ONLY)25 BURNER COVER PLATE
(DOWNFLOW/HORIZONTAL UNITS ONLY)
NOTE: A PARTS BAG IS INCLUDED WITH THE FURNACE. IF A NEWPARTS
BAG NEEDS TO BE ORDERED, USE THE FOLLOWING PARTNUMBERS:
AS-100717-01 FOR (-)GRL-45, (-)GRL-60, (-)GRK-75, (-)GRL-90 AND
(-)GRK-105 AS-100717-02 FOR (-)GRK-120
DOWNFLOW/HORIZONTAL FURNACE COMPONENTS
NOTE: A PARTS BAG IS INCLUDED WITH THE FURNACE. IF A NEWPARTS
BAG NEEDS TO BE ORDERED, USE THE FOLLOWING PARTNUMBERS:
AS-100717-03 FOR (-)GTK-60, (-)GTK-75, (-)GTK-90, (-)GTK-105 AND
(-)GTK-120
AIRFLOW
9
8
4
17
1125
10
18
5
19
20
21
2
3 15 12 23 22
71
14613
AIRFLOW
Install units in Canada in accordancewith CSA-B149, local
installationcodes and authorities havingjurisdiction. CSA-B149 is
availablefrom:CSA-INTERNATIONAL178 Rexdale Blvd.Toronto,
OntarioCanada M9W, 1R3NOTE: It is our recommendation thatany HVAC
equipment which weresubject to flooding be replaced toavoid any
risk of property damage,personal injury or death. Also, ourposition
that the immersion by floodwaters compromises any HVACproducts thus
voiding this warranty.NOTE:Models having option code 320added at
the end of the model numberdesignation are shipped factory readyfor
a horizontal only installation. Thedrain trap for downflow
installation isnot included in the parts bag for
theseappliances.
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IMPROPER INSTALLATION, ORINSTALLATION NOT MADE INACCORDANCE WITH
THE CSAINTERNATIONAL (CSA)CERTIFICATION OR THESEINSTRUCTIONS, CAN
RESULT INUNSATISFACTORY OPERATIONAND/OR DANGEROUS CONDI-TIONS AND
ARE NOT COVERED BYTHE UNIT WARRANTY.
IN COMPLIANCE WITHRECOGNIZED CODES, IT ISRECOMMENDED THAT
ANAUXILIARY DRAIN PAN BEINSTALLED UNDER ALLEVAPORATOR COILS OR
UNITSCONTAINING EVAPORATOR COILSTHAT ARE LOCATED IN ANY AREAOF A
STRUCTURE WHERE DAMAGETO THE BUILDING OR BUILDINGCONTENTS MAY OCCUR
AS ARESULT OF AN OVERFLOW OF THECOIL DRAIN PAN OR A STOPPAGEIN THE
PRIMARY CONDENSATEDRAIN PIPING. SEE ACCESSORIESSECTION OF THESE
INSTRUCTIONSFOR AUXILIARY HORIZONTALOVERFLOW PAN INFORMATION(MODEL
(-)XBM).
RECEIVINGImmediately upon receipt, all cartonsand contents
should be inspected fortransit damage. Units with damagedcartons
should be opened immediately.If damage is found, it should be
notedon the delivery papers, and a damageclaim filed with the last
carrier. • After unit has been delivered to jobsite, remove carton
taking care not todamage unit.
• Check the unit rating plate for unitsize, electric heat, coil,
voltage,phase, etc. to be sure equipment
NOTICE
IMPORTANT INFORMATIONABOUT EFFICIENCY ANDINDOOR AIR
QUALITYCentral cooling and heating equipmentis only as efficient as
the duct systemthat carries the cooled or heated air. Tomaintain
efficiency, comfort and goodindoor air quality, it is important to
havethe proper balance between the airbeing supplied to each room
and the airreturning to the cooling and heatingequipment.
Proper balance and sealing of the ductsystem improves the
efficiency of theheating and air conditioning systemand improves
the indoor air quality ofthe home by reducing the amount ofairborne
pollutants that enter homesfrom spaces where the ductwork and /or
equipment is located. Themanufacturer and the U.S.Environmental
Protection Agency’sEnergy Star Program recommend thatcentral duct
systems be checked by aqualified contractor for proper balanceand
sealing.
DUCT LEAKS CAN CREATE ANUNBALANCED SYSTEM AND DRAWPOLLUTANTS
SUCH AS DIRT,DUST, FUMES AND ODORS INTOTHE HOME CAUSING
PROPERTYDAMAGE. FUMES AND ODORSFROM TOXIC, VOLATILE ORFLAMMABLE
CHEMICALS, ASWELL AS AUTOMOBILE EXHAUSTAND CARBON MONOXIDE (CO),CAN
BE DRAWN INTO THE LIVINGSPACE THROUGH LEAKING DUCTSAND UNBALANCED
DUCTSYSTEMS CAUSING PERSONALINJURY OR DEATH (SEE FIGURE 2). • IF
AIR-MOVING EQUIPMENT ORDUCTWORK IS LOCATED INGARAGES OR
OFF-GARAGESTORAGE AREAS - ALL JOINTS,SEAMS, AND OPENINGS IN
THEEQUIPMENT AND DUCT MUST BESEALED TO LIMIT THEMIGRATION OF TOXIC
FUMESAND ODORS INCLUDING CARBONMONOXIDE FROM MIGRATINGINTO THE
LIVING SPACE.
• IF AIR-MOVING EQUIPMENT ORDUCTWORK IS LOCATED INSPACES
CONTAINING FUELBURNING APPLIANCES SUCH ASWATER HEATERS OR BOILERS
-ALL JOINTS, SEAMS, ANDOPENINGS IN THE EQUIPMENTAND DUCT MUST ALSO
BESEALED TO PREVENTDEPRESSURIZATION OF THESPACE AND
POSSIBLEMIGRATION OF COMBUSTIONBYPRODUCTS INCLUDINGCARBON MONOXIDE
INTO THELIVING SPACE.
NOTICE
WARNING!
matches what is required for thejob specification.
• Read the entire instructions beforestarting the
installation.
• Some building codes require extracabinet insulation and
gasketingwhen unit is installed in atticapplications.
• If installed in an unconditionedspace, apply caulking around
thepower wires, control wires,refrigerant tubing and condensateline
where they enter the cabinet.Seal the power wires on the
insidewhere they exit conduit opening.Caulking is required to
prevent airleakage into and condensate fromforming inside the unit,
control box,and on electrical controls.
• Install the unit in such a way as toallow necessary access to
thecoil/filter rack and blower/controlcompartment.
• Install the unit in a level position toensure proper
condensatedrainage. Make sure unit is level inboth directions
within 1/8”.
• Install the unit in accordance withany local code which may
applyand the national codes. Latesteditions are available
from:“National Fire ProtectionAssociation, Inc., BatterymarchPark,
Quincy, MA 02269.” Thesepublications are:
• ANSI/NFPA No. 70-(Latest Edition)National Electrical Code.
• NFPA90A Installation of AirConditioning and
VentilatingSystems.
• NFPA90B Installation of warm airheating and air
conditioningsystems.
• The equipment has beenevaluated in accordance with theCode of
Federal Regulations,Chapter XX, Part 3280.
FIGURE 2MIGRATION OF DANGEROUS SUBSTANCES, FUMES, AND ODORS INTO
LIVING SPACES
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NEVER TEST FOR GAS LEAKSWITH AN OPEN FLAME. USE ACOMMERCIALLY
AVAILABLESOAP SOLUTION MADESPECIFICALLY FOR THEDETECTION OF LEAKS
TO CHECKALL CONNECTIONS, ASSPECIFIED IN GAS SUPPLY ANDPIPING
SECTION OF THESEINSTRUCTIONS.
ALWAYS INSTALL FURNACE TOOPERATE WITHIN THEFURNACE'S
INTENDEDTEMPERATURE-RISE RANGEWITH A DUCT SYSTEM WHICHHAS AN
EXTERNAL STATICPRESSURE WITHIN THEALLOWABLE RANGE, ASSPECIFIED IN
DUCTING SECTIONOF THESE INSTRUCTIONS. SEEALSO FURNACE RATING
PLATE.
WHEN A FURNACE IS INSTALLEDSO THAT SUPPLY DUCTS CARRYAIR
CIRCULATED BY THEFURNACE TO AREAS OUTSIDETHE SPACE CONTAINING
THEFURNACE, THE RETURN AIRSHALL ALSO BE HANDLED BYDUCT(S) SEALED TO
THEFURNACE CASING ANDTERMINATING OUTSIDE THESPACE CONTAINING
THEFURNACE.
WHEN THIS FURNACE ISINSTALLED IN A RESIDENTIALGARAGE, IT MUST BE
INSTALLEDSO THE BURNERS AND IGNITIONSOURCE ARE LOCATED NO LESSTHAN
18 INCHES ABOVE THEFLOOR. THIS IS TO REDUCE THERISK OF IGNITING
FLAMMABLEVAPORS WHICH MAYBE PRESENT IN A GARAGE.ALSO, THE FURNACE
MUST BELOCATED OR PROTECTED TOAVOID PHYSICAL DAMAGE BYVEHICLES.
FAILURE TO FOLLOWTHESE WARNINGS CAN CAUSE AFIRE OR EXPLOSION,
RESULTINGIN PROPERTY DAMAGE,PERSONAL INJURY OR DEATH.
THE FURNACE MAY BE USEDFOR HEATING OF BUILDINGS ORSTRUCTURES
UNDERCONSTRUCTION.
INSTALLATION MUST COMPLYWITH ALL INSTALLATIONINSTRUCTIONS
INCLUDING:
• PROPER VENT INSTALLATION;
• FURNACE OPERATING UNDERTHERMOSTATIC CONTROL;
• RETURN AIR DUCT SEALED TOTHE FURNACE;
• AIR FILTERS IN PLACE;
• SET FURNACE INPUT RATEAND TEMPERATURE RISE PERRATING PLATE
MARKING;
• MEANS FOR PROVIDINGOUTDOOR AIR REQUIRED FORCOMBUSTION;
• RETURN AIR TEMPERATUREMAINTAINED BETWEEN 55°F(13°C) AND 80°F
(27°C); AND
• CLEAN FURNACE, DUCT WORKAND COMPONENTS UPONSUBSTANTIAL
COMPLETIONOF THE CONSTRUCTIONPROCESS, AND VERIFYFURNACE
OPERATINGCONDITIONS INCLUDINGIGNITION, INPUT RATE,TEMPERATURE RISE
ANDVENTING, ACCORDING TO THEINSTRUCTIONS AND CODES.
! WARNING
! WARNING
! WARNING
! WARNING
! WARNING
! WARNING
! WARNING
! WARNING
! WARNING
! WARNING
! WARNING
SAFETY INFORMATION
DO NOT OPERATE THE SYSTEMWITHOUT FILTERS. A PORTIONOF THE DUST
ENTRAINED IN THEAIR MAY TEMPORARILY LODGEIN THE AIR DUCT RUNS AND
ATTHE SUPPLY REGISTERS. ANYCIRCULATED DUST PARTICLESWILL BE HEATED
AND CHARREDBY CONTACT WITH THEFURNACE HEAT EXCHANGER.THIS SOOTY
RESIDUE WILL SOILCEILINGS, WALLS, DRAPES,CARPETS AND OTHERHOUSEHOLD
ARTICLES. SOOTDAMAGE MAY ALSO RESULTWITH, OR WITHOUT, FILTERS
INPLACE, WHEN CERTAIN TYPESOF CANDLES ARE BURNED, ORCANDLEWICKS ARE
LEFTUNTRIMMED.
COMBUSTION PRODUCTS MUSTBE DISCHARGED OUTDOORS.CONNECT THIS
FURNACE TO ANAPPROVED VENT SYSTEM ONLY,AS SPECIFIED IN VENT
PIPEINSTALLATION SECTION OFTHESE INSTRUCTIONS.
PROVIDE ADEQUATECOMBUSTION AND VENTILATIONAIR TO THE FURNACE
SPACE ASSPECIFIED IN THE COMBUSTIONAND VENTILATION AIR SECTIONOF
THESE INSTRUCTIONS.
INSTALL THIS FURNACE ONLY INA LOCATION AND POSITION ASSPECIFIED
IN THE LOCATIONREQUIREMENTS ANDCONSIDERATIONS SECTION OFTHESE
INSTRUCTIONS. PROVIDEADEQUATE COMBUSTION ANDVENTILATION AIR TO
THEFURNACE SPACE AS SPECIFIEDIN THE VENTING SECTION OFTHESE
INSTRUCTIONS.
USE ONLY WITH TYPE OF GASAPPROVED FOR THIS FURNACE.REFER TO THE
FURNACE RATINGPLATE.
DO NOT INSTALL THIS FURNACEIN A MOBILE HOME!! THISFURNACE IS NOT
APPROVED FORINSTALLATION IN A MOBILEHOME. DOING SO COULD CAUSEFIRE,
PROPERTY DAMAGE,PERSONAL INJURY OR DEATH.
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DUCT LEAKS CAN CREATE ANUNBALANCED SYSTEM AND DRAWPOLLUTANTS
SUCH AS DIRT, DUST,FUMES AND ODORS INTO THEHOME CAUSING
PROPERTYDAMAGE. FUMES AND ODORSFROM TOXIC, VOLATILE ORFLAMMABLE
CHEMICALS, AS WELLAS AUTOMOBILE EXHAUST ANDCARBON MONOXIDE (CO),
CAN BEDRAWN INTO THE LIVING SPACETHROUGH LEAKING DUCTS
ANDUNBALANCED DUCT SYSTEMSCAUSING PERSONAL INJURY ORDEATH (SEE
FIGURE 2). • IF AIR-MOVING EQUIPMENT ORDUCTWORK IS LOCATED
INGARAGES OR OFF-GARAGESTORAGE AREAS - ALL JOINTS,SEAMS, AND
OPENINGS IN THEEQUIPMENT AND DUCT MUST BESEALED TO LIMIT
THEMIGRATION OF TOXIC FUMESAND ODORS INCLUDING CARBONMONOXIDE FROM
MIGRATINGINTO THE LIVING SPACE.
• IF AIR-MOVING EQUIPMENT ORDUCTWORK IS LOCATED INSPACES
CONTAINING FUELBURNING APPLIANCES SUCH ASWATER HEATERS OR BOILERS
-ALL JOINTS, SEAMS, ANDOPENINGS IN THE EQUIPMENTAND DUCT MUST ALSO
BESEALED TO PREVENTDEPRESSURIZATION OF THESPACE AND
POSSIBLEMIGRATION OF COMBUSTIONBYPRODUCTS INCLUDINGCARBON MONOXIDE
INTO THELIVING SPACE.
IN COMPLIANCE WITH RECOGNIZEDCODES, IT IS RECOMMENDED THATAN
AUXILIARY DRAIN PAN BEINSTALLED UNDER ALLEVAPORATOR COILS OR
UNITSCONTAINING EVAPORATOR COILSTHAT ARE LOCATED IN ANY AREAOF A
STRUCTURE WHERE DAMAGETO THE BUILDING OR BUILDINGCONTENTS MAY OCCUR
AS ARESULT OF AN OVERFLOW OF THECOIL DRAIN PAN OR A STOPPAGEIN THE
PRIMARY CONDENSATEDRAIN PIPING. SEE ACCESSORIESSECTION OF THESE
INSTRUCTIONSFOR AUXILIARY HORIZONTALOVERFLOW PAN INFORMATION(MODEL
(-)XBM).
! WARNING
NOTICEIMPROPER INSTALLATION, ORINSTALLATION NOT MADE
INACCORDANCE WITH THE CSAINTERNATIONAL (CSA)CERTIFICATION OR
THESEINSTRUCTIONS, CAN RESULT INUNSATISFACTORY OPERATIONAND/OR
DANGEROUS CONDI-TIONSAND ARE NOT COVERED BY THEUNIT WARRANTY.
NOTICE
IMPORTANT!THE COMMONWEALTH OFMASSACHUSETTS REQUIRESCOMPLIANCE
WITH REGULATION248 CMR 4.00 AND 5.00 FORINSTALLATION OF
THROUGH-THE-WALL VENTED GAS APPLIANCES ASFOLLOWS:(a) For all side
wall horizontally ventedgas fueled equipment installed in
everydwelling, building or structure used inwhole or in part for
residential purposes,including those owned or operated bythe
Commonwealth and where the sidewall exhaust vent termination is
less thanseven (7) feet above finished grade inthe area of the
venting, including but notlimited to decks and porches,
thefollowing requirements shall be satisfied:1. INSTALLATION OF
CARBONMONOXIDE DETECTORS. At the timeof installation of the side
wall horizontalvented gas fueled equipment, theinstalling plumber
or gasfitter shallobserve that a hard wired carbonmonoxide detector
with an alarm andbattery back-up is installed on the floorlevel
where the gas equipment is to beinstalled. In addition, the
installingplumber or gasfitter shall observe that abattery operated
or hard wired carbonmonoxide detector with an alarm isinstalled on
each additional level of thedwelling, building or structure served
bythe side wall horizontal vented gasfueled equipment. It shall be
theresponsibility of the property owner tosecure the services of
qualified licensedprofessionals for the installation of hardwired
carbon monoxide detectors.a. In the event that the side
wallhorizontally vented gas fueled equipmentis installed in a crawl
space or an attic,the hard wired carbon monoxide detectorwith alarm
and battery back-up may beinstalled on the next adjacent floor
level.b. In the event that the requirements ofthis subdivision can
not be met at thetime of completion of installation, theowner shall
have a period of thirty (30)days to comply with the
aboverequirements; provided, however, thatduring said thirty (30)
day period, abattery operated carbon monoxidedetector with an alarm
shall be installed.2. APPROVED CARBON MONOXIDEDETECTORS. Each
carbon monoxidedetector as required in accordance withthe above
provisions shall comply withNFPA 720 and be ANSI/UL 2034 listedand
IAS certified.3. SIGNAGE. A metal or plasticidentification plate
shall be permanentlymounted to the exterior of the building ata
minimum height of eight (8) feet abovegrade directly in line with
the exhaustvent terminal for the horizontally ventedgas fueled
heating appliance orequipment. The sign shall read, in printsize no
less than one-half (1/2) inch insize, “GAS VENT DIRECTLY BELOW.KEEP
CLEAR OF ALLOBSTRUCTIONS”.
4. INSPECTION. The state or localgas inspector of the side
wallhorizontally vented gas fueledequipment shall not approve
theinstallation unless, upon inspection,the inspector observes
carbonmonoxide detectors and signageinstalled in accordance with
theprovisions of 248 CMR 5.08(2)(a) 1through 4.(b) EXEMPTIONS: The
followingequipment is exempt from 248 CMR5.08(2)(a)1 through 4:1.
The equipment listed in Chapter 10entitled “Equipment Not Required
ToBe Vented” in the most current editionof NFPA 54 as adopted by
the Board;and2. Product Approved side wallhorizontally vented gas
fueledequipment installed in a room orstructure separate from the
dwelling,building or structure used in whole orin part for
residential purposes.(c) MANUFACTURERREQUIREMENTS – GASEQUIPMENT
VENTING SYSTEMPROVIDED. When the manufacturerof Product Approved
side wallhorizontally vented gas equipmentprovides a venting system
design orventing system components with theequipment, the
instructions providedby the manufacturer for installation ofthe
equipment and the ventingsystem shall include:1. Detailed
instructions for theinstallation of the venting systemdesign or the
venting systemcomponents; and2. A complete parts list for the
ventingsystem design or venting system.(d) MANUFACTURERREQUIREMENTS
– GASEQUIPMENT VENTING SYSTEMNOT PROVIDED. When themanufacturer of
a Product Approvedside wall horizontally vented gasfueled equipment
does not providethe parts for venting the flue gases,but identifies
“special ventingsystems”, the following requirementsshall be
satisfied by the manufacturer:1. The referenced “special
ventingsystem” instructions shall be includedwith the appliance or
equipmentinstallation instructions; and2. The “special venting
systems” shallbe Product Approved by the Board,and the instructions
for that systemshall include a parts list and detailedinstallation
instructions.(e) A copy of all installationinstructions for all
Product Approvedside wall horizontally vented gasfueled equipment,
all ventinginstructions, all parts lists for ventinginstructions,
and/or all venting designinstructions shall remain with
theappliance or equipment at thecompletion of the installation.
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FIGURE 3HORIZONTAL FURNACE W/HEAT TAPE ON CONDENSATE TRAP
GENERAL INFORMATION
DO NOT INSTALL THIS FURNACEIN A MOBILE HOME!! This furnaceis not
approved for installation in amobile home. Doing so could
causeFIRE, PROPERTY DAMAGE,PERSONAL INJURY OR DEATH.
WHEN THIS FURNACE ISINSTALLED IN A RESIDENTIALGARAGE, IT MUST BE
INSTALLEDSO THE BURNERS AND IGNITIONSOURCE ARE LOCATED NO LESSTHAN
18 INCHES ABOVE THEFLOOR. THIS IS TO PREVENTTHE RISK OF
IGNITINGFLAMMABLE VAPORS WHICHMAY BE PRESENT IN A GARAGE.ALSO, THE
FURNACE MUST BELOCATED OR PROTECTED TOAVOID PHYSICAL DAMAGE
BYVEHICLES. FAILURE TO FOLLOWTHESE WARNINGS CAN CAUSE AFIRE OR
EXPLOSION, RESULTINGIN PROPERTY DAMAGE,PERSONAL INJURY OR
DEATH.
1. IMPORTANT: If installing the unitover a finished ceiling or
livingarea, be certain to install anauxiliary condensate drain
panunder the entire unit. Thisauxiliary drain pan should
extendunder any evaporator coilinstalled with the furnace and
theopen portion of the condensatedrain assembly. See“Condensate
Drain/Neutralizer”section for more details.
2. IMPORTANT: If using a coolingevaporator coil with this
furnace:
a. be sure the air passes overthe heat exchanger beforepassing
over the coolingcoil. The cooled air passingover the warm ambient
airinside the heat exchangertubes can causecondensation inside the
tubesresulting in corrosion andeventual failure.
b. install a parallel duct systemto divert all the air from
thefurnace allowing it to passover the cooling coil only.
Usedampers or other means toprevent chilled air frompassing over
the heatexchanger.
If these are manual dampers, theymust be equipped to prevent
heatingor cooling operation unless thedamper is in the full heat or
coolposition.
3. IMPORTANT: Install the furnacelevel. If it is not level,
condensatecannot drain properly, possiblycausing furnace shut
down.
NOTE: These furnaces are approvedfor installation in attics, as
well asalcoves, utility rooms, closets andcrawlspaces. Provisions
must bemade to prevent freezing ofcondensate.
4. IMPORTANT: If this furnace isinstalled in a garage, attic
and/orany unconditioned space, install aself-regulating heat tape
aroundthe condensate trap and along theentire length of the
condensatedrain in the unconditioned space.When the condensing
horizontalgas furnace is installed in anunconditioned space where
thetemperature would be capable ofreaching close to or below
32°F
! WARNING
! WARNING
(0°C), a self-regulating heat tapeis required on the
condensatedrain, along with an insulationwrap. The heat tape should
meetthe following requirements:
a. The heat tape must be ULlisted.
b. The heat tape must beinstalled per themanufacturer’s
instructions forthe entire length of drain pipein the unconditioned
space.
c. The heat tape should be ratedat 5 or 6 watts per foot
at120V
IMPORTANT: Support this unitwhen installed. Since this furnaceis
suitable for attic or crawl spaceinstallation, it may be installed
oncombustible wood flooring or byusing support brackets.
5. IMPORTANT: If installing in autility room, be sure the door
iswide enough to:
a. allow the largest part of thefurnace to pass; or
b. allow any other appliance(such as a water heater)to pass.
c. allow service clearance
LOCATION REQUIREMENTS AND CONSIDERATIONS
I526
DRAINPIPE
HEATTAPE
TRAP
AIRFLOW
-
9
Upflow furnaces are shipped with abottom closure panel
installed.When bottom return air is used,remove the panel by
removing thetwo screws attaching the panel tothe front base angle.
See filtersection for details.
COMBUSTIBLE MATERIAL MUSTNOT BE PLACED ON OR AGAINSTTHE FURNACE
JACKET. THEAREA AROUND THE FURNACEMUST BE KEPT CLEAR AND FREEOF ALL
COMBUSTIBLEMATERIALS INCLUDINGGASOLINE AND OTHERFLAMMABLE VAPORS
ANDLIQUIDS. PLACEMENT OFCOMBUSTIBLE MATERIALS ON,AGAINST OR AROUND
THEFURNACE JACKET CAN CAUSEAN EXPLOSION OR FIRERESULTING IN
PROPERTYDAMAGE, PERSONAL INJURY ORDEATH. THE HOMEOWNERSHOULD BE
CAUTIONED THATTHE FURNACE AREA MUST NOTBE USED AS A BROOM CLOSETOR
FOR ANY OTHER STORAGEPURPOSES.
CLEARANCE -ACCESSIBILITYThe design of forced air furnaces
withinput ratings as listed in the tableunder Figure 5 are
certified by CSA-International for the clearances tocombustible
materials shown ininches.
See name/rating plate and clearancelabel for specific model
number andclearance information.
Service clearance of at least 24inches is recommended in front
ofall furnaces.
NOTE: Use recommended 24”clearance if accessibility
clearancesare greater than fire protectionclearances.
UPFLOW FURNACES ARE DESIGN-CERTIFIED FOR INSTALLATIONON
COMBUSTIBLE FLOORS.NOTE, HOWEVER, THATFURNACES MUST NOT BEINSTALLED
DIRECTLY ONCARPETING, TILE OR OTHERCOMBUSTIBLE MATERIAL OTHERTHAN
WOOD FLOORING.INSTALLATION ON ACOMBUSTIBLE MATERIAL CANRESULT IN
FIRE, CAUSINGPROPERTY DAMAGE, PERSONALINJURY OR DEATH.
! WARNING
THIS FURNACE IS NOTAPPROVED OR RECOMMENDEDFOR INSTALLATION ON
ITS BACK,WITH ACCESS DOORS FACINGUPWARDS OR IN ANYHORIZONTAL
CONFIGURATION.
SITE SELECTION1. Select a site in the building near
the center of the proposed, orexisting, duct system.
2. Give consideration to the ventsystem piping when selecting
thefurnace location. Be sure theventing system can get from
thefurnace to the termination withminimal length and elbows.
3. Locate the furnace near theexisting gas piping. Or, if
runninga new gas line, locate thefurnace to minimize the lengthand
elbows in the gas piping.
4. Locate the furnace to maintainproper clearance to
combustiblesas shown in the following tables.
DO NOT LIFT THE UNIT BY THEHEAT EXCHANGER TUBES.DOING SO CAN
DAMAGE THEHEAT EXCHANGER ASSEMBLY.
! WARNING
CAUTION!
! WARNING
FIGURE 4HORIZONTAL FURNACE INSTALLED W/SUPPORT BRACKETS
GASPIPE
TRAP
EXHAUSTFAN
ELECTRICALCONDUIT
INTAKEVENT
I522
AIRFLOW
NOTE: Do not block furnace access with support rods. Maintain
clearances recommended in Figure7. Allow enough space for proper
service maintenance or replacement of the heat exchanger andblower
assembly.
-
10
FIGURE 5CLEARANCE TO COMBUSTIBLES, UPFLOW UNITS
I392
UPF
LOW M
ODELS
MINIM
UM CLEAR
ANCE
(IN.)
LEFT
RIGHT
SHIP
MODEL
AB
CD
EF
SIDE
SIDE
BACK
TOP
FRONT
VENT
WGT
S
0417
1 /2
1611/32
155 /8
215
1325/32
00
01
2*0
111
0617
1 /2
1611/32
155 /8
215
1325/32
00
01
2*0
117
07A
171 /2
1611/32
155 /8
215
1325/32
00
01
2*0
123
07B
2119
27/32
191 /8
218
1 /2
179 /32
00
01
2*0
145
0921
1927/32
191 /8
218
1 /2
179 /32
00
01
2*0
148
1021
1927/32
191 /8
218
1 /2
179 /32
00
01
2*0
152
1224
1 /2
2311/32
225 /8
222
2025/32
00
01
2*0
160
*A service clearance of a
t least 24 inches is re
commended in front o
f all furnaces.
SUPPLY
AIR
RETURN
AIR
AIRFLOW
OPTIONAL RETURN AIR
CUTOUT (EITHER SIDE)*
*BOTH SIDES FOR 1800 CFM
OPTIONAL
RETURN
AIR CUTOUT
(EITHER SIDE)*
I392.DGN
2 DIA. KNOCKOUT
ALT. GAS CONNECTION
267 ⁄16
275 ⁄8
2 DIA.
GAS CONNECTION
-
11
FIGURE 6CLEARANCE TO COMBUSTIBLES, DOWNFLOW UNITS
I393
DOWNFLOW M
ODELS
MINIM
UM CLEAR
ANCE
(IN.)
LEFT
RIGHT
SHIP
MODEL
AB
CD
EF
SIDE
SIDE
BACK
TOP
FRONT
VENT
WGT
S
0617
1 ⁄216
11⁄32
155 ⁄8
216
5 ⁄813
7 ⁄80
00
12*
0117
07A
171 ⁄2
1611⁄32
155 ⁄8
216
5 ⁄813
7 ⁄80
00
12*
0123
07B
2119
27/32
193 /16
218
1 /2
179 /32
00
01
2*0
123
0921
1927⁄32
193 ⁄1
62
201 ⁄8
173 ⁄8
00
01
2*0
148
1021
1927⁄32
193 ⁄1
62
201 ⁄8
173 ⁄8
00
01
2*0
152
1224
1 ⁄223
11⁄32
225 ⁄8
223
5 ⁄820
7 ⁄80
00
12*
0160
*A service clearance of a
t least 24 inches is re
commended in front o
f all furnaces.
NOTE:IN DOWNFLOW CONFIGURATION, RETURN AIR CUTOUT IS NOT
PERMITTED.
AIRFLOW
SUPPLY
AIR
RETURN
AIR
A103501.DGN
2 DIA.
ALT. GAS CONNECTION
2513⁄16
43⁄8
2 DIA.
GAS
CONNECTION
-
12
FIGURE 7CLEARANCE TO COMBUSTIBLES, HORIZONTAL UNITS
I520
HORIZONTA
L MODELS
MINIM
UM CLEAR
ANCE
(IN.)
LEFT
RIGHT
SHIP
MODEL
AB
CD
EF
SIDE
SIDE
BACK
TOP
FRONT
VENT
WGT
S
0617
1 ⁄216
11⁄32
155 ⁄8
216
5 ⁄813
7 ⁄80
00
12*
0117
07A
171 ⁄2
1611⁄32
155 ⁄8
216
5 ⁄813
7 ⁄80
00
12*
0123
07B
2119
27⁄32
193 ⁄1
62
201 ⁄8
173 ⁄8
00
01
2*0
123
0921
1927⁄32
193 ⁄1
62
201 ⁄8
173 ⁄8
00
01
2*0
148
1021
1927⁄32
193 ⁄1
62
201 ⁄8
173 ⁄8
00
01
2*0
152
1224
1 ⁄223
11⁄32
225 ⁄8
223
5 ⁄820
7 ⁄80
00
12*
0160
*A service clearance of a
t least 24 inches is re
commended in front o
f all furnaces.
NOTE: In horizontal configuration, return air cutout is not
permitted.
Horizontal left-hand airflow only.
IMPORTANT: This furnace is not approved or recommended for
installation on its back, with access doors facing upwards.
AIRFLOW
DRAIN TRAP LOCATION
SUPPLY
AIR
RETURN AIR
A103601.DGN
2 DIA.
GAS
CONNECTION
2 DIA.
ALT. GAS
CONNECTION
43⁄8
2513⁄16
-
1313
DUCTINGProper air flow is required for thecorrect operation of
this furnace.Too little air flow can cause erraticoperation and can
damage the heatexchanger. The duct system mustcarry the correct
amount of air forheating and cooling if summer airconditioning is
used.
Size the ducts according toacceptable industry standards
andmethods. The total static pressuredrop of the air distribution
systemshould not exceed 0.5" w.c.
NEVER ALLOW THE PRODUCTSOF COMBUSTION FROM THEFLUE TO ENTER THE
RETURN AIRDUCTWORK OR THE CIRCULATEDAIR SUPPLY. ALL RETURNDUCTWORK
MUST BEADEQUATELY SEALED ANDSECURED TO THE FURNACEWITH SHEET METAL
SCREWS;AND JOINTS, TAPED. ALL OTHERDUCT JOINTS MUST BE SECUREDWITH
APPROVED CONNECTIONSAND SEALED AIRTIGHT. WHENAN UPFLOW FURNACE
ISMOUNTED ON A PLATFORM WITHRETURN THROUGH THE BOTTOM,IT MUST BE
SEALED AIRTIGHTBETWEEN THE FURNACE ANDTHE RETURN AIR PLENUM.
THEFLOOR OR PLATFORM MUSTPROVIDE SOUND PHYSICALSUPPORT OF THE
FURNACEWITHOUT SAGGING, CRACKS, ORGAPS, AROUND THE BASE,PROVIDING A
SEAL BETWEENTHE SUPPORT AND THE BASE.
FAILURE TO PREVENTPRODUCTS OF COMBUSTIONFROM BEING CIRCULATED
INTOTHE LIVING SPACE CAN CREATEPOTENTIALLY HAZARDOUSCONDITIONS,
INCLUDINGCARBON MONOXIDE POISONINGTHAT COULD RESULT INPERSONAL
INJURY OR DEATH.
DO NOT, UNDER ANYCIRCUMSTANCES, CONNECTRETURN OR SUPPLY
DUCTWORKTO OR FROM ANY OTHER HEATPRODUCING DEVICE SUCH AS
AFIREPLACE INSERT, STOVE, ETC.DOING SO MAY RESULT IN FIRE,CARBON
MONOXIDE POISONING,EXPLOSION, PERSONAL INJURYOR PROPERTY
DAMAGE.
IMPORTANT: Some high efficiencyfilters have a greater than
normalresistance to air flow. This canadversely affect furnace
operation.BE SURE TO CHECK AIR FLOW.
IMPORTANT: When using outside air,design and adjust the system
to maintaina return air temperature ABOVE 55° Fduring the heating
season.
NOTE: Return air grilles and warm airregisters must not be
obstructed orclosed.
UPFLOW UNITS1. Position the unit to minimize long
runs of duct or runs of duct withmany turns and elbows.
2. Open the return air compartment.
UPFLOW FURNACE: A SOLID METALBASE PLATE MUST REMAIN IN
THEFURNACE BOTTOM WHEN USINGSIDE AIR RETURN. FAILURE TOINSTALL A
BASE PLATE COULDCAUSE THE PRODUCTS OFCOMBUSTION TO CIRCULATE
INTOTHE LIVING SPACE AND CREATEPOTENTIAL LY HAZARDOUSCONDITIONS,
INCLUDING CARBONMONOXIDE POISONING OR DEATH.FOR BOTTOM RETURN,
REMOVESOLID METAL BASE PLATE.
a. Cut an opening in the side. Theopening should be cut the
fullwidth and height of the knockoutson the unit. See Figure 8.
NOTE: Where the maximum air flowis 1800 CFM or more, both sides
or 1side and the bottom must be used forreturn air.
3. Connect the return duct or returnair cabinet to the unit.
Make theconnection air tight to prevententraining combustion
gasesfrom an adjacent fuel-burningappliance.
4. Be sure to have adequatespace for the unit filter.
NOTE: DO NOT take return airfrom bathrooms, kitchens,furnace
rooms, garages, utility orlaundry rooms, or cold areas.
NOTE: DO NOT use a rear airreturn.
5. If summer air conditioning isdesired, position the indoor
coilon the supply-air side of the unit.Insure that no air can
bypass thiscoil.
6. Connect the supply air plenum tothe furnace plenum
opening.
IMPORTANT: If a flexible ductconnector must be used, itMUST be
rated for a minimumtemperature of 250°F.continuous.
! WARNING
FIGURE 8UPFLOW CUTOUT AND DRILL INFORMATION
JACKET
DRILL (2)3/16" DIA.HOLES
8.000
4.875
1.531
! WARNING
-
14
DOWNFLOW UNITS1. Position the unit to minimize long
runs of duct or runs of duct withmany turns and elbows.
2. If summer air conditioning isdesired, position the indoor
coilon the supply-air side of the unit.Insure that no air can
bypass thiscoil.
3. If installing on a combustible floorand not using an
airconditioning plenum, install thespecial non-combustible
floorbase. See Table 1 and Figure 9.
THE DOWNFLOW FURNACEDESIGN IS CERTIFIED FORINSTALLATION ON A
NON-COMBUSTIBLE FLOOR. USE THESPECIAL BASE SPECIFIED ONTHE FURNACE
CLEARANCELABEL. FAILURE TO INSTALL THESPECIAL BASE MAY RESULT
INFIRE, PROPERTY DAMAGE,PERSONAL INJURY OR DEATH.THIS SPECIAL BASE
IS SHIPPEDFROM THE FACTORY AS ANACCESSORY.
4. Connect the furnace to thesupply air plenum.
5. Connect the return air ducting tothe return air opening at
the topof the unit. Make the connectionair tight to prevent
entrainingcombustion gases from anadjacent fuel-burning
appliance.
NOTE: In downflowconfiguration, return air cut out isnot
permitted.
6. Be sure to have adequatespace for the unit filter.
NOTE: DO NOT take return airfrom bathrooms, kitchens,
furnacerooms, garages, utility or laundryrooms, or cold areas.
HORIZONTAL UNITIMPORTANT: THIS FURNACE MAYONLY BE INSTALLED SO
AS WHENFACING THE FRONT OF THEFURNACE, SUPPLY AIR ISDISCHARGED ON
THE LEFT HANDSIDE.
1. Position the unit to minimize longruns of duct or runs of
duct withmany turns and elbows.
2. If summer air conditioning isdesired, position the indoor
coil onthe supply air side of the unit.Insure that no air can
bypass thiscoil.
3. Connect the furnace to the supplyair plenum.
4. Connect the return air ducting tothe return air opening at
the rightend of the unit. Make theconnection air tight to
preventpulling combustion gases from anadjacent fuel-burning
appliance.
NOTE: In horizontal configuration,return air cut out is not
permitted.
5. Be sure to have adequate spacefor the unit filter.
NOTE: DO NOT take return airfrom bathrooms, kitchens,
furnacerooms, garages, utility or laundryrooms, or cold areas.
! WARNING
FIGURE 9NON-COMBUSTIBLE FLOOR BASE
TABLE 1NON-COMBUSTIBLE FLOOR BASES
Floor Base SizeNo. Cabinet
(-)XGC-B17 17
(-)XGC-B21 21
(-)XGC-B24 24
-
15
GENERAL INFORMATION
READ AND FOLLOW ALLINSTRUCTIONS IN THIS SECTION.FAILURE TO
PROPERLY VENTTHIS FURNACE CAN CAUSECARBON MONOXIDE POISONINGOR AN
EXPLOSION OR FIRE,RESULTING IN PROPERTYDAMAGE, PERSONAL INJURYOR
DEATH.
This furnace removes both sensibleand latent heat from the
combustionflue gases. Removal of latent heatresults in condensation
of flue gaswater vapor. This condensed watervapor drains from the
secondary heatexchanger and out of the unit into adrain trap.
When installed as a non-direct ventfurnace, only exhaust piping
isrequired and inside combustion airmay be used. Refer to section
on“COMBUSTION & VENTILATION AIRFOR FURNACE INSTALLATIONS.”
Direct vent installations require adedicated combustion air and
ventingsystem. All air for combustion is takenfrom the outside
atmosphere and allcombustion products are dischargedto the
outdoors.
The combustion air and vent pipefittings must conform to
AmericanNational Standards Institute (ANSI)and American Society for
TestingMaterials (ASTM) standardsD1785 (Schedule 40 PVC),
D2665(PVC-DWV), D2241 (SDR-21 andSDR26-26 PVC), D2661 (ABS-DWV)or
F628 (Schedule 40 ABS-DWV).
IN CANADA, PRODUCTSCERTIFIED FOR INSTALLATIONAND INTENDED TO BE
VENTEDWITH PLASTIC VENT SYSTEMS(PVC, CPVC) MUST USE VENTSYSTEMS
THAT ARE CERTIFIEDTO THE STANDARD FOR TYPE BHGAS VENTING SYSTEMS,
ULCS636.THE COMPONENTS OF THECERTIFIED MATERIAL MUST NOTBE
INTERCHANGED WITH OTHERVENT SYSTEMS OR
UNLISTEDPIPE/FITTINGS.PLASTIC COMPONENTS ANDSPECIFIED PRIMERS AND
GLUESOF THE CERTIFIED SYSTEM MUSTBE FROM A SINGLE
SYSTEMMANUFACTURER AND NOTINTERMIXED WITH OTHERSYSTEM
MANUFACTURER’SPARTS.NOTE: INLET AIR PIPING IS NOTCONSIDERED TO BE A
PART OFTHE “VENTING SYSTEM”. THE
REQUIREMENT THAT VENTMATERIAL BE CERTIFIED TO ULCS636 DOES NOT
APPLY TO INLETAIR PIPING. VENT TERMINATIONSAND CONCENTRIC
TERMINATIONSMUST BE APPROVED BY THEMANUFACTURER AND
CERTIFIEDULC-636.
IMPORTANT: The plastic combustionair and venting components are
ofSchedule 40 PVC. If using ABSpiping, ensure that the
solventcement is compatible for joining PVCto ABS components or use
amechanical connection that canwithstand the vent temperatures
andare corrosion resistant.
NOTE: Schedule 40 ABS-DWV pipeand fittings may be used as
analternate to PVC pipe for thecombustion air inlet and vent
pipes.
NOTE: Cellular core PVC is alsoapproved for use. It must be
schedule40PVC-DWV cellular pipe for non-pressure applications
andmanufactured under ASTM F-891.
NOTE: With the furnace correctlyvented, the inducer will
moveapproximately 25 cfm per 100,000Btu’s.
IMPORTANT: No part of thecombustion air and vent pipes mayrun
under ground.
OVERTEMPERATURESAFETY SWITCHESFurnaces are equipped with
safetyswitches in the control compartmentto protect against
overtemperatureconditions caused by inadequatecombustion air
supply. The switchesare located in the burnercompartment. If a
switch is tripped itmust be manually reset.
DO NOT JUMPER THESEDEVICES! IF ONE OF THESESWITCHES SHOULD TRIP,
AQUALIFIED INSTALLER, SERVICEAGENCY OR THE GAS SUPPLIERMUST BE
CALLED TO CHECKAND/OR CORRECT FORADEQUATE COMBUSTION AIRSUPPLY. DO
NOT RESET THESWITCHES WITHOUT TAKINGCORRECTIVE ACTION TO ASSURETHAT
AN ADEQUATE SUPPLY OFCOMBUSTION AIR IS MAINTAINEDUNDER ALL
CONDITIONS OFOPERATION. FAILURE TO DO SOCAN RESULT IN
CARBONMONOXIDE POISONING ORDEATH. IF THIS UNIT IS MOUNTEDIN A
CLOSET, THE DOOR MUSTBE CLOSED WHEN MAKING THISCHECK.
REPLACE THESE SWITCHESONLY WITH THE IDENTICALREPLACEMENT
PART.
EXISTING VENT SYSTEMSWhen the installation of this
furnacereplaces an existing furnace that isremoved from a vent
system servingother appliances, the vent system islikely to be too
large to properly ventthe remaining attached appliances.The
following steps should befollowed with each applianceremaining
connected to the originalcommon vent system. Place theappliance to
be tested in operation,while the other appliances
remainingconnected to the common ventsystem are not in operation.
Test theoperation of each applianceindividually by the following
method.1. Permanently seal any unused
openings in the common ventingsystem.
2. Visually inspect the ventingsystem for proper size
andhorizontal pitch and determinethat there is no
blockage,restriction, leakage, corrosion orother deficiencies which
couldcause an unsafe condition.
3. If practical, close all buildingdoors, windows and all
doorsbetween the space where theappliances remaining connectedto
the common venting systemare located.Turn on clothes dryers and
anyappliance not connected to thecommon venting system. Turn onany
exhaust fans, such as rangehoods and bathroom exhausts,so they will
operate at maximumspeed. Do not operate a summerexhaust fan. Close
fireplacedampers.
4. Follow the lighting instructions.Place the appliance
beinginspected into operation. Adjustthe thermostat so the
appliancewill operate continuously.
5. Test for spillage at the draft hoodrelief opening after 5
minutes ofmain burner operation. Use theflame of a match or candle,
orsmoke from a cigarette, cigaror pipe.
VENTING AND COMBUSTION AIR PIPING
! WARNING
! WARNING
! WARNING
-
16
1. Cut pipe end square. Chamferedge of pipe. Clean fitting
socketand pipe joint area of all dirt,grease and moisture.
2. After checking pipe and socketfor proper fit, wipe socket
andpipe with cleaner-primer. Applya liberal coat of primer to
insidesurface of socket and outside ofpipe. Read instructions
includedwith the primer for properapplication.
3. Apply a thin coat of cementevenly in the socket. Quicklyapply
a heavy coat of cement tothe pipe end and insert pipe intofitting
with a slight twistingmovement until it bottoms out.NOTE: Cement
must be fluid; ifnot, recoat.
4. Hold the pipe in the fitting for 30seconds to prevent the
taperedsocket from pushing the pipe outof the fitting.
5. Wipe all excess cement from thejoint with a rag. Allow 15
minutesbefore handling. Cure time variesaccording to fit,
temperature andhumidity.
NOTE: Stir the solvent cementfrequently while using. Use a
naturalbristle brush or the dauber suppliedwith the can. The proper
brush size isone inch.IMPORTANT: For Proper InstallationDO NOT use
solvent cement thathas become curdled, lumpy orthickened.DO NOT
thin. Observe shelfprecautions printed on containers.For
application below 32°F, use onlylow-temperature-type
solventcement.
6. After it has been determined thateach appliance that
remainsconnected to the commonventing system properly vents(when
tested as outlined above),return doors, windows, exhaustfans,
fireplace dampers and anyother gas-burning appliance totheir
previous conditions of use.
7. If improper venting is observedduring any of the above tests,
thecommon venting system must beresized.
When the furnace is installed in thesame space with other
gasappliances such as a water heater, besure there is an adequate
supply ofcombustion and ventilation air for theother appliances. Do
not delete orreduce the combustion air supplyrequired by the other
gas appliancesin this space. See Z223.1, NationalFuel Gas Code
(NFPA54) fordetermining the combustion airrequirements for gas
appliances. Anunconfined space must have at least50 cubic feet
(volume) for each1,000 BTUH of the total input of allappliances in
the space. If the openspace containing the appliances is ina
building with tight construction(contemporary construction),
outsideair may still be required for theappliances to burn and vent
properly.Outside air openings should be sizedthe same as for a
confined space.IMPORTANT: Only the current ventinstructions apply.
All 90 Plus GasFurnaces cannot be common vented.
JOINING PIPE AND FITTINGS
PVC SOLVENT CEMENTS ANDPRIMERS ARE HIGHLYFLAMMABLE.
PROVIDEADEQUATE VENTILATION AND DONOT ASSEMBLE NEAR HEATSOURCE OR
AN OPEN FLAME. DONOT SMOKE. AVOID SKIN OR EYECONTACT. OBSERVE
ALLCAUTIONS AND WARNINGSPRINTED ON MATERIALCONTAINERS. FAILURE
TOFOLLOW THESE GUIDELINESMAY RESULT IN FIRE, EXPLOSIONOR
ASPHYXIATION CAUSINGPERSONAL INJURY OR DEATH.All pipe, fittings,
solvent cement,primers and procedures mustconform to American
NationalStandard Institute and AmericanSociety for Testing and
Materials(ANSI/ASTM) standards as shownbelow:
CEMENTING JOINTSProperly seal all joints in the PVCvent using
the following materials andprocedures.PVC CLEANER-PRIMER ANDPVC
MEDIUM-BODY SOLVENTCEMENTIMPORTANT: After cutting pipe,remove all
ragged edges and burrs.This is important to prevent reductionin
pressure drop throughout thesystem.
! WARNING
PIPE & FITTING MATERIAL ASTMSPECIFICATION
Schedule 40 PVC (Pipe) D1785
Schedule 40 PVC (Cellular Core Pipe) F891
Schedule 40 PVC (Fittings) D2466
SDR-21PVC (Pipe) D2241
SDR-26 PVC (Pipe) D2241
Schedule 40 ABS Cellular Core DWV (Pipe) F628
Schedule 40 ABS (Pipe) D1527
Schedule 40 ABS (Fittings) D2468
ABS-DWV (Drain Waste & Vent)(Pipe & Fittings) D2661
PVC-DWV (Drain Waste & Vent)(Pipe & Fittings) D2665
-
17
NON-DIRECTFURNACE INSTALLATIONS
THE FURNACE AND ANY OTHERFUEL-BURNING APPLIANCE MUSTBE PROVIDED
WITH ENOUGHFRESH AIR FOR PROPERCOMBUSTION AND VENTILATIONOF THE
FLUE GASES. MOSTHOMES WILL REQUIRE THATOUTSIDE AIR BE SUPPLIED
INTOTHE FURNACE AREA. FAILURETO DO SO CAN CAUSEPERSONAL INJURY OR
DEATHFROM CARBON MONOXIDEPOISONING.
Adequate facilities for providing air forcombustion and
ventilation must beprovided in accordance with section5.3, “Air for
Combustion andVentilation” of the National Fuel GasCode, ANSI
Z223.1 (latest edition) orapplicable provisions for the
localbuilding codes, and not obstructed soas to prevent the flow of
air to thefurnace.
IMPORTANT: Air for combustion andventilation must not come from
acorrosive atmosphere. Any failuredue to corrosive elements in
theatmosphere is excluded fromwarranty coverage.
The following types of installation(but not limited to the
following) willrequire OUTDOOR AIR forcombustion, due to
chemicalexposures:
• Commercial buildings• Buildings with indoor pools• Furnaces
installed in laundry rooms• Furnaces in hobby or craft rooms•
Furnaces installed near chemicalstorage areas.
Exposure to the following substancesin the combustion air supply
(but notlimited to the following) will alsorequire OUTDOOR AIR
forcombustion:
• Permanent wave solutions• Chlorinated waxes and cleaners•
Chlorine-based swimming poolchemicals
• Water softening chemicals• De-icing salts or chemicals• Carbon
tetrachloride• Halogen type refrigerants
• Cleaning solvents (such asperchloroethylene)
• Printing inks, paint removers,varnishes, etc.
• Hydrochloric acid• Cements and glues• Antistatic fabric
softeners forclothes dryers
• Masonry curing and acid washingmaterials
Combustion air must be free of acid-forming chemicals such as
sulphur,fluorine and chlorine. These elementsare found in aerosol
sprays,detergents, bleaches, cleaningsolvents, air fresheners,
paint andvarnish removers, refrigerants andmany other commercial
andhousehold products. When burned ina gas flame, vapors from
theseproducts form acid compounds. Theacid compounds increase the
dewpoint temperature of the flue productsand are highly corrosive
after theycondense.
ALL FURNACE INSTALLATIONSMUST COMPLY WITH THENATIONAL FUEL GAS
CODE ANDLOCAL CODES TO PROVIDEADEQUATE COMBUSTION ANDVENTILATION
AIR FOR THEFURNACE. FAILURE TO DO SOCAN RESULT IN EXPLOSION,FIRE,
PROPERTY DAMAGE,CARBON MONOXIDE POISONING,PERSONAL INJURY OR
DEATH.
Combustion air requirements aredetermined by whether the furnace
isin an open (unconfined) area or in aconfined space such as a
closet orsmall room.
EXAMPLE 1:FURNACE LOCATED IN ANUNCONFINED SPACE
Using indoor air for combustion.
An unconfined space must have atleast 50 cubic feet for each
1,000BTUH of the total input for allappliances in the space. Here
are afew examples of the room sizesrequired for different inputs.
The sizesare based on 8-foot ceilings.
BTUH Minimum Sq. Feet Typical Room SizeInput With 8' Ceiling
With 8' Ceiling
45,000 281 14' x 20' OR 16' x 18'
60,000 375 15' x 25' OR 19' x 20'
75,000 469 15' x 31' OR 20' x 24'
90,000 563 20’ x 28’ OR 24’ x 24’
105,000 657 20' x 33' OR 26' x 25'
120,000 750 25' x 30' OR 24' x 32'
If the open space containing thefurnace is in a building with
tightconstruction, outside air may still berequired for the furnace
to operateand vent properly. Outside airopenings should be sized
the sameas for a confined space.
EXAMPLE 2:FURNACE LOCATED IN ACONFINED SPACE
A confined space (any space smallerthan shown above as
“unconfined”)must have openings into the spacewhich are located in
accordance withthe requirements set forth in thefollowing
subsections A and B. Sizethe openings by how they areconnected to
the heated area or tothe outside,and by the input of all appliances
inthe space.
If confined space is within a buildingwith tight construction,
combustion airmust be taken from outdoors or areafreely
communicating with theoutdoors.
A. USING INDOOR AIR FORCOMBUSTION
IMPORTANT: Air should not betaken from a heated space with
afireplace, exhaust fan or otherdevice that may produce anegative
pressure.
If combustion air is taken from theheated area, the openings
musteach have at least 100 squareinches of free area. Each
openingmust have at least one square inchof free area for each
1,000 BTUHof total input in the space. Hereare some examples of
typicalopenings required.
COMBUSTION AND VENTILATION AIR
! WARNING
! WARNING
-
18
BTUH Free AreaInput Each Opening
45,000 100 square inches
60,000 100 square inches
75,000 100 square inches
90,000 100 square inches
105,000 105 square inches
120,000 120 square inches
B. USING OUTDOOR AIR FORCOMBUSTION
IMPORTANT: Do not take air froman attic space that is
equippedwith power ventilation.
The confined space mustcommunicate with the outdoors
inaccordance with Methods 1 or 2.The minimum dimension of
airopenings shall not be less than 3inches. Where ducts are
used,they shall be of the same cross-sectional area as the free
area ofthe openings to which theyconnect.
Method 1Two permanent openings, onelocated within 12 inches of
the topand one located within 12 inchesof the bottom of the
enclosure,shall be provided. The openingsshall communicate
directly, or byducts, with the outdoors or spaces(crawl or attic)
that freelycommunicate with the outdoors.
a. Where directly communicatingwith the outdoors or where
communicating to the outdoorsthrough vertical ducts as shown
inFigure 11, each opening shallhave a minimum free area of 1square
inch for each 4,000 BTUHof total appliance input rating in
theenclosure.
BTUH Free Area Round PipeInput Each Opening Size
45,000 11.25 square inches 4"
60,000 15.00 square inches 5"
75,000 18.75 square inches 5"
90,000 22.50 square inches 6"
105,000 26.25 square inches 6"
120,000 30.00 square inches 6"
b. Where communicating withoutdoors through horizontal
ducts,each opening shall have aminimum free area of 1 squareinch
for each 2,000 BTUH of totalinput rating of all equipment in
theenclosure (see Figure 12).
Here are some typical sizes:
BTUH Free Area Round PipeInput Each Opening Size
45,000 22.50 square inches 6"
60,000 30.00 square inches 6"
75,000 37.50 square inches 7"
90,000 45.00 square inches 8"
105,000 52.50 square inches 8"
120,000 60.00 square inches 9"
FIGURE 11AIR FROM ATTIC/CRAWL SPACE
FIGURE 12OUTSIDE AIR USING A HORIZONTAL DUCT
FIGURE 10AIR FROM HEATED SPACE
NOTE:EACH OPENING SHALLHAVE A FREE AREA OFNOT LESS THAN
ONESQUARE INCH PER 1,000BTU PER H0UR OF THETOTAL INPUT RATING OFALL
EQUIPMENT IN THEENCLOSURE, BUT NOTLESS THAN 100 SQUAREINCHES.
GASWATERHEATER
FURNACE
GASWATERHEATER
GASWATERHEATER
FURNACE FURNACE
12" MAX.12"MAX.
1 SQ. INCH PER4000 BTUH INLET AIR
OUTLET AIR 1 SQ. INCHPER 2000 BTUH
INLET AIR 1 SQ. INCHPER 2000 BTUH
1 SQ. INCH PER4000 BTUHOUTLET AIR
OPTIONAL 1 SQ. INCH PER 4000 BTUH INLET AIR
VENTILATEDATTIC GABLE ORSOFFIT VENTS
GABLEVENTOUTLET AIR
IN ATTICMUST BEABOVEINSULATION
-
19
FIGURE 13COMBUSTION AIR FITTING
Method 2 (not shown)One permanent opening, locatedwithin 12
inches of the top of theenclosure, shall be permittedwhere the
equipment hasclearances of at least 1 inch fromthe sides and back
and 6 inchesfrom the front of the appliance.The opening shall
directlycommunicate with the outdoors orcommunicate through a
vertical orhorizontal duct to the outdoors orspaces (crawl or
attic) that freelycommunicate with the outdoors,and shall have a
minimum freearea of:
a. 1 square inch for each 3,000BTUH of the total input rating of
allequipment located in the enclosureand
BTUH Free Area Round PipeInput Each Opening Size
45,000 15.00 square inches 4"
60,000 16.67 square inches 5"
75,000 25.00 square inches 6"
90,000 30.00 square inches 6"
105,000 35.00 square inches 7"
120,000 40.00 square inches 7"
b. Not less than the sum of theareas of all vent connectors in
theconfined space.
If unit is installed where there is anexhaust fan, sufficient
ventilationmust be provided to prevent theexhaust fan from creating
a negativepressure.
Combustion air openings must not berestricted in any manner.
CONSULT LOCAL CODES FORSPECIAL REQUIREMENTS.
CONNECTION TOFURNACEIMPORTANT:When indoorcombustion air is used,
the inlet airopening at the furnace must beprotected from
accidental blockage.(See Figure 13).
UPFLOW
DOWNFLOW/HORIZONTAL
2" PVCDOUBLEELBOW
TOPOPTION
EXHAUST
2" PVC ELBOW
SIDEOPTION
2" PVCDOUBLEELBOW*
COMBUSTION AIREXHAUST
ATTACH DOUBLE ELBOW TO INTAKE AIRCOLLAR AND SECURE WITH TWO
SHEETMETAL SCREWS TO PREVENT ACCIDENTALBLOCKAGE OF INTAKE AIR
OPENING.
*NOTE: WHEN FURNACE IS INSTALLED IN A HORIZONTAL POSITIONONLY
ONE 90° ELBOW IS REQUIRED. INSTALL THE ELBOW SO THEOPEN END IS
POINTED DOWNWARD.
ATTACH DOUBLE ELBOW TO TOP INLETAIR OPENING OR 90° ELBOW TO
SIDEINLET AIR OPENING TO PREVENTACCIDENTAL BLOCKAGE OF
INTAKEOPENING. PLUG OPENING NOT USED.
I337I336
PREDRILL FOR SCREWS.
-
20
ELEVATED SINGLE PIPE ALTERNATE TEE TERMINATIONSee Figure 15. The
tee termination may be elevated up to 24 inches above thewall
penetration if required for anticipated snow levels. Use 2
long-sweep, 2-in.PVC elbows and 2-in. PVC pipe, attaching the tee
so it is 12 inches from the wall.
NON-DIRECT VENTINSTALLATIONGUIDELINESIMPORTANT: Failure to
correctly followall venting guidelines may result inerratic furnace
operation, freeze-up ofcombustion air or exhaust air piping
orsooting of the furnace.All exhaust piping must be installed
incompliance with Part 7, “Venting ofEquipment,” of the latest
edition of theNational Fuel Gas Code NPFA54/ ANSIZ223.1-, local
codes or ordinances andthese instructions.1. Vertical piping is
preferred.2. All horizontal piping must slope
upward a minimum of 1/4 inch perfoot of run so that condensate
drainstoward the furnace.
3. All horizontal runs must besupported at least every 4 feet.
Nosags or dips are permitted.
4. IMPORTANT: Do not common ventwith any other appliance. Do
notinstall in the same chase or chimneywith a metal or high
temperatureplastic pipe from another gas or fuel-burning appliance
unless therequired minimum clearances tocombustibles are
maintainedbetween the pvc pipe and otherpipes.
5. All vent runs through unconditionedspaces where
below-freezingtemperatures are expected shouldbe insulated with
1-in. thick,medium-density, foil-facedfiberglass. An equivalent
“arm-a-flex” or “rub-a-tex” insulation mayalso be used as long as
there is noheat tape applied to the vent pipe.For horizontal runs
where water maycollect, wrap the vent pipe with self-regulating 3
or 5 watt heat tape. Theheat tape must be U.L. listed andinstalled
per the manufacturer’sinstructions.
6. The minimum vent pipe length is5 feet.
7. Extend the exhaust pipe a minimumof 18” from the cabinet
before turningvent.
8. Vent cannot be ran underground.
FIGURE 14TEE TERMINAL – FOR STANDARDHORIZONTAL
NON-DIRECTINSTALLATION
VENT
12" 12" MIN. ABOVEGRADE OR
SNOW LEVEL
NUMBERS OF ELBOWS45° OR 90°
Medium / Long Radius ONLY
1-2 3-4 5-6
2”Standard 60 55 50
45,000Alternate 55 50 45
2”Standard 30 25 20
Alternate 25 20 1560,000
3”Standard 120 120 115
Alternate 120 120 110
3”Standard 45 40 NA
75,000Alternate 45 45 NA
3”Standard 90 85 75
90,000Alternate 60 50 45
105,000 3”Standard 45 40 NA
Alternate 45 45 NA
120,000 3”Standard 70 65 55
Alternate 40 30 25
NOTES:1. *N.A. - NOT APPLICABLE.2. MAXIMUM OF 6 ELBOWS MAY BE
USED. DO NOT COUNT ELBOWS REQUIRED FORALTERNATE TERMINATION. USE
ONLY MEDIUM OR LONG SWEEP ELBOWS.
3. A 45 OR 22.5 DEGREE ELBOW IS CONSIDERED ONE ELBOW.4. NO
SCREENS MAY BE USED TO COVER EXHAUST.*A = 17-1/2” CABINET WIDTH B =
21) CABINET WIDTH
FURNACEINPUT
VENT PIPE INSTALLATION
PIPESIZE
TERMINATION
TABLE 2UPFLOW UNITSFOR NON-DIRECT VENT APPLICATIONS - AIR FOR
COMBUSTION PROVIDED FROM INDOORS
MAXIMUM ALLOWABLE LENGTH IN FEET OF EACH EXHAUST PIPE AND INTAKE
PIPE
NUMBERS OF ELBOWS45° OR 90°
Medium / Long Radius ONLY
1-2 3-4 5-6
2”Standard 40 35 30
Alternate 30 25 2060,000
3”Standard 120 120 120
Alternate 110 105 100
3”Standard 120 120 120
75,000Alternate 100 95 85
90,000 3”Standard 110 105 95
Alternate 50 40 35
105,000 3”Standard 65 60 55
Alternate 50 40 35
120,000 3”Standard 40 35 30
Alternate 40 35 30
NOTES:1. *N.R. - NOT RECOMMENDED.2. MAXIMUM OF 6 - 90 DEGREE
ELBOWS MAY BE USED. DO NOT COUNT ELBOWS REQUIRED FORALTERNATE
TERMINATION. USE ONLY MEDIUM OR LONG SWEEP ELBOWS.
3. A 45 OR 22.5 DEGREE ELBOW IS CONSIDERED ONE ELBOW.4. NO
SCREENS MAY BE USED TO COVER EXHAUST.*A = 17-1/2” CABINET WIDTH B =
21” CABINET WIDTH
FURNACEINPUT
PIPESIZE
TERMINATION
TABLE 3DOWNFLOW/HORIZONTAL UNITSFOR NON-DIRECT VENT APPLICATIONS
- AIR FOR COMBUSTION PROVIDED FROM INDOORS
MAXIMUM ALLOWABLE LENGTH IN FEET OF EACH EXHAUST PIPE AND INTAKE
PIPE
-
21
STANDARD INSTALLATIONSThe single-pipe system requires anexhaust
pipe only. Combustion air maybe taken from the furnace
installationarea or ducted to the furnace area fromthe outside.
Size the exhaust pipe as specified inTable 2. This table lists
the maximumallowable length in feet of the exhaustpipe that may be
used for all furnaceinputs as related to the number ofelbows
required and the termination.(See shaded area.)
Vertical through-the-roof installations donot require a vent
termination. Use 2-in.PVC pipe extending a minimum of 12inches
above the anticipated level ofsnow accumulation. See exhaust
piperequirements, Figure 19. When 3-in.vent pipe is used from
furnace to theroof, reduce it to 2 inches beforepenetrating the
roof. A maximum of 18inches of 2-in. pipe may be used belowthe
roof. Maximum exposed vent lengthabove the roof line is 30”. Total
2” ventlength is a maximum of 48”.
Horizontal vent terminations require a2-in. PVC tee positioned
12 inches fromthe outside wall. See exhaust piperequirements,
Figure 29. When 3-in.pipe is used from the furnace to theoutside
wall, reduce it to 2 inchesbefore penetrating the wall. A maximumof
18 inches of 2-in. pipe may be usedinside the wall.
An alternate termination may be usedas shown in Figure 15 to
clearanticipated snow levels. The tee maybe raised up to 24 inches
above thewall penetration. Use two long-sweepradius bend, 2-in. PVC
elbows and alength of 2-in. PVC pipe so that theelbows are on
24-in. centers.
NOTE: Extend the exhaust a minimumof 18" from the furnace top
plate beforeturning vent.
NON-DIRECT VENT TERMINATIONLOCATION REQUIREMENTS
MOISTURE IN THE COMBUSTIONPRODUCTS CONDENSES AS ITLEAVES THE
TERMINATION. THISCONDENSATE CAN FREEZE ONEXTERIOR WALLS, UNDER
THEEAVES, AND ON SURROUNDINGOBJECTS. SOME DISCOLORATIONIS TO BE
EXPECTED. HOWEVER,IMPROPER LOCATION ORINSTALLATION CAN
CAUSESTRUCTURAL OR EXTERIOR FINISHDAMAGE TO THE BUILDING.
Non-direct venting locationrequirements are slightly different
insome cases than direct venting. Installa non-direct vent with the
followingminimum clearances.See Figure 16.
1. Locate the bottom of the ventterminal at least 12 inches
abovegrade. Increase the 12-in.minimum to keep the terminalopenings
above the level of snowaccumulation, where applicable.
2. The vent shall not terminate overpublic walkways or over an
areawhere condensate or vapor couldcreate a nuisance or hazard.
3. 4 feet below, 4 feet horizontallyfrom, or 1 foot above any
door,window soffit, under eave vent orgravity air inlet to the
building.
4. The vent terminal shall have aminimum horizontal clearance
of4 feet from electric meters, gasmeters, regulators and
reliefequipment.
5. 6 feet from an inside cornerformed by two exterior walls –10
feet is the recommendeddistance.
6. Locate it 3 feet above any forcedair inlet located within 10
feet.Any fresh air or make-up air inlet,such as for a dryer or
furnacearea, is considered a forced airinlet.
7. Avoid areas where drippingcondensate may cause problems,such
as above planters, patios, oradjacent to windows wheresteam may
cause fogging.
! CAUTION
In addition to the minimum clearanceslisted above, the vent
location shouldalso be governed by the followingguidelines.
1. Do not terminate under any kindof patio or deck. If running
thevent under a deck, insulate it toinsure no condensate freezesand
blocks the pipe.
2. Do not locate on the side of abuilding with prevailing
winterwinds. This will help preventmoisture from freezing on
wallsand overhangs (under eaves).
3. Do not extend vent directlythrough brick or masonrysurfaces.
Use a rust-resistantsheet metal or plastic backingplate behind
vent.
4. Do not locate too close to shrubsas condensate may stunt or
killthem.
5. Minimum vertical clearances of 1foot are recommended
foroverhangs up to 1 foot horizontal.The vertical clearance should
beincreased equally for eachadditional increase in
horizontaloverhang to a maximum verticalclearance of 6 feet.
6. Caulk all cracks, seams andjoints within 6 feet
horizontallyand above and below vent.
7. Do not terminate in any area thatmay allow flue gases to
stagnate.
FIGURE 15ALTERNATE HORIZONTAL TERMINATION FOR NON-DIRECT
VENTINSTALLATIONS
NOT APPLICABLE FOR:(-)GRL-07EYBGS MODEL(-)GRL-07EMAES
MODEL(-)GRL-10EZAJS MODEL
12"
FROM
24"MAX.
PIPESUPPORTSTRAP
OUTSIDEWALL
I198
-
22
FIGURE 16OTHER THAN DIRECT VENT TERMINAL CLEARANCES
Nat
ural
Gas
and
Pro
pan
e In
stal
latio
n C
od
eN
atio
nal F
uel G
as C
od
e
Can
adia
n In
stal
lati
on
sU
S In
stal
lati
on
sC
anad
ian
Inst
alla
tio
ns
US
Inst
alla
tio
ns
-
23
DIRECT VENTINSTALLATIONS
READ AND FOLLOW ALLINSTRUCTIONS IN THIS SECTION.FAILURE TO
PROPERLY VENTTHIS FURNACE CAN CAUSECARBON MONOXIDE POISONINGOR AN
EXPLOSION OR FIRE,RESULTING IN PROPERTYDAMAGE, PERSONAL INJURYOR
DEATH.Direct vent installations require adedicated combustion air
and ventingsystem. All air for combustion is takenfrom the outside
atmosphere and allcombustion products are discharged tothe
outdoors. Therefore, noventilation or combustion airopenings are
required.IMPORTANT: The plastic combustionair and venting
components are ofSchedule 40 PVC. If using ABS pipingensure that
the solvent cement iscompatible for joining PVC to ABScomponents or
use a mechanicalconnection that can withstand the venttemperatures
and are corrosionresistant.
INSTALLATION GUIDELINESAll exhaust piping must be installed
incompliance with Part 7, “Venting ofEquipment,” of the latest
edition of theNational Fuel Gas Code NPFA54/ANSI Z223.1-, local
codes orordinances and these instructions.1. Vertical piping is
preferred.2. All horizontal piping must slope
upward a minimum of 1/4 inchper foot of run so that
condensatedrains toward the furnace.
3. All horizontal runs must besupported at least every 4 feet.No
sags or dips are permitted.
4. IMPORTANT: Do not commonvent with any other appliance. Donot
install in the same chase orchimney with a metal or hightemperature
plastic pipe fromanother gas or fuel-burningappliance unless the
requiredminimum clearances tocombustibles are maintainedbetween the
PVC pipe and otherpipes. Minimum 3 ft. clearancerequired between
combustion airinlet and any other exhaust.
5. For horizontal runs where watermay collect, wrap the vent
pipewith self-regulating 3 or 5 wattheat tape. The heat tape must
beU.L. listed and installed per themanufacturer’s instructions.
6. The minimum, pipe length is5 feet for combustion air
andexhaust.
7. Do not install elbows back toback. Allow at least 15”
betweenelbows.
Size the exhaust and combustion airintake pipes as specified in
Table 4 orTable 5. This table lists the maximum
! WARNING
Standard/Concentric RXGY-D02/RXGY-D02A/RXGY-E03A/GXGY-G02 65 60
5545,000 2”
Alternate RXGY-D02/RXGY-D02A 55 50 45
Standard/Concentric RXGY-D02/RXGY-D02A/RXGY-E03A/RXGY-G02 40 35
302”
Alternate RXGY-D02/RXGY-D02A 40 35 3060,000
3”Standard/Concentric RXGY-D03/RXGY-D03A/RXGY-E03A/RXGY-G02 120
120 120
Alternate RXGY-D03/RXGY-D03A 110 105 100
Standard/Concentric RXGY-D03/RXGY-D03A/RXGY-E03A/RXGY-G02 50 40
NA75,000 3”
Alternate RXGY-D03/RXGY-D03A 50 40 NA
Standard/Concentric RXGY-D03/RXGY-D03A/RXGY-E03A/RXGY-G02 110
105 9590,000 3”
Alternate RXGY-D03/RXGY-D03A 50 40 35
Standard/Concentric RXGY-D03/RXGY-D03A/RXGY-E03A/RXGY-G02 50 40
NA105,000 3”
Alternate RXGY-D03/RXGY-D03A 50 40 NA
Standard/Concentric RXGY-D03/RXGY-D03A/RXGY-E03A/RXGY-G02 50 40
30120,000 3”
Alternate RXGY-D04/RXGY-D04A 45 35 30
FURNACEINPUT
PIPESIZE
TERMINATION VENT TERMINATIONKIT RECOMMENDED
2 4 6
NUMBER OF ELBOWS45 or 90 Degrees
Medium / Long Radius ONLY
TABLE 4UPFLOW UNITS FOR DIRECT VENT APPLICATIONS - AIR FOR
COMBUSTION PROVIDED FROM OUTDOORS
MAXIMUM ALLOWABLE LENGTH IN FEET OF EACH EXHAUST PIPE AND INTAKE
AIR PIPE
TABLE 5DOWNFLOW/HORIZONTAL UNITS FOR DIRECT VENT APPLICATIONS -
AIR FOR COMBUSTION PROVIDED FROM OUTDOORS
MAXIMUM ALLOWABLE LENGTH IN FEET OF EACH EXHAUST PIPE AND INTAKE
AIR PIPE
FURNACEINPUT
PIPESIZE
TERMINATION VENT TERMINATIONKIT RECOMMENDED
1 - 2 3 - 4 5 - 6
NUMBER OF ELBOWS22.5, 45 or 90 Degrees
Medium / Long Radius ONLY
NOTES:1. N.A. - NOT APPLICABLE2. MAXIMUM OF 6 ELBOWS MAY BE
USED. DO NOT COUNT ELBOWS IN ALTERNATE TERMINATION KIT.MEDIUM OR
LONG SWEEP ELBOWS MAY BE USED.
3. A 45 DEGREE ELBOW IS CONSIDERED ONE ELBOW.4. CONCENTRIC
TERMINATION NO. RXGY-E03/RXGY-E03A IS FOR THRU-THE-ROOF OR
THRU-THE-WALL VENTING.5. USE KITS RXGY-DO2/D02A (2"), RXGY-G02
(2"), OR RXGY-D03/D03A (3") FOR STANDARD OR ALTERNATETHRU-THE-WALL
VENTING.
6. USE KITS RXGY-D04/D04A FOR ALTERNATE VENTING OF 120,000 BTUH
UNITS WITH LONG RUNS.7. KIT NUMBERS CONTAINING SUFFIX “A” ARE
APPROVED FOR INSTALLATION IN CANADA.8. NO SCREENS MAY BE USED TO
COVER COMBUSTION AIR AND EXHAUST.(A*) = 171⁄2” CABINET (B*) = 21”
CABINET
2”Standard/Concentric RXGY-D02/RXGY-D02A/RXGY-E03A/RXGY-G02 40
35 30
Alternate RXGY-D02/RXGY-D02A 30 25 2060,000
3”Standard/Concentric RXGY-D03/RXGY-D03A/RXGY-E03A/RXGY-G02 120
120 120
Alternate RXGY-D03/RXGY-D03A 110 105 100
Standard/Concentric RXGY-D03/RXGY-D03A/RXGY-E03A/RXGY-G02 120
120 12075,000 3”
Alternate RXGY-D03/RXGY-D03A 100 95 85
Standard/Concentric RXGY-D03/RXGY-D03A/RXGY-D03A/RXGY-G02 110
105 9590,000 3”
Alternate RXGY-D03/RXGH-D03A 50 40 35
Standard/Concentric RXGY-D03/RXGY-D03A/RXGH-E03A/RXGY-G02 65 60
55105,000 3”
Alternate RXGY-D03/RXGY-D03A 50 40 35
Standard/Concentric RXGY-D03/RXGY-D03A/RXGY-E03A/RXGY-G02 40 35
30
120,000 3” Alternate RXGY-D03/RXGY-D03A 40 35 30
Alternate RXGY-D04/RXGY-D04A 45 35 30
NOTES:1. N.A. - NOT APPLICABLE2. MAXIMUM OF 6 ELBOWS MAY BE
USED. DO NOT COUNT ELBOWS IN ALTERNATE TERMINATION KIT.MEDIUM OR
LONG SWEEP ELBOWS MAY BE USED.
3. A 45 DEGREE ELBOW IS CONSIDERED ONE ELBOW.4. CONCENTRIC
TERMINATION NO. RXGY-E03/RXGY-E03A IS FOR THRU-THE-ROOF OR
THRU-THE-WALL VENTING.5. USE KITS RXGY-DO2/D02A (2"), RXGY-G02
(2"), OR RXGY-D03/D03A (3") FOR STANDARD OR ALTERNATETHRU-THE-WALL
VENTING.
6. USE KITS RXGY-D04/D04A FOR ALTERNATE VENTING OF 120,000 BTUH
UNITS WITH LONG RUNS.7. KIT NUMBERS CONTAINING SUFFIX “A” ARE
APPROVED FOR INSTALLATION IN CANADA.8. NO SCREENS MAY BE USED TO
COVER COMBUSTION AIR AND EXHAUST.(A*) = 171⁄2” CABINET (B*) = 21”
CABINET
-
24
COMBUSTION AIR FORDIRECT VENTINSTALLATIONSTHE COMBUSTION AIR
SYSTEMDESIGNED FOR THIS FURNACEMUST BE USED.
When this furnace is installed as adirect vent forced air
furnace, allcombustion air is supplied directly tothe burner
through a special air inletsystem outlined in these
instructions.This system consists of field-suppliedSchedule 40 or
26 SDR-PVC pipeand one of the following horizontalvent termination
kits: (-)XGY-D02/D02A, (-)XGY-D03/D03A, (-)XGY-D04/D04A, or
(-)XGY-E03A.
NOTE: Schedule 40 ABS-DWV pipeand fittings may be used as
analternate to PVC pipe for thecombustion air inlet and vent
pipes.
The combustion air for this furnace issupplied directly from the
outdoorsthrough the combustion air inletsystem.
When the furnace is installed in thesame space with other
gasappliances, such as a water heater,be sure there is an adequate
supplyof combustion and ventilation air forthe other appliances. Do
not delete orreduce the combustion air supplyrequired by the other
gas appliancesin this space. See Z223.1, NationalFuel Gas Code
(NFPA54) for deter-mining the combustion airrequirements for gas
appliances. Anunconfined space must have at least50 cubic feet
(volume) for each1,000 BTUH of the total input of allappliances in
the space. If the openspace containing the appliances is ina
building with tight construction(contemporary construction),
outsideair may still be required for theappliances to burn and vent
properly.Outside air openings should be sizedthe same as for a
confined space.
STANDARD TERMINATIONSSTANDARD VERTICALTERMINATIONS
COMBUSTION AIR PIPING
Use two medium-radius sweepelbows to keep the inlet downward
to
prevent entry of rain. See Figure 19for the proper relationship
ofcombustion air to exhausttermination.
STANDARD HORIZONTALTERMINATIONS
COMBUSTION AIR PIPING
When 3-in. pipe is used between thefurnace and outside wall,
reduce itto 2 inches before penetrating thewall. Up to 18 inches of
2-in. pipemay be used inside the wall.
The standard horizontal intake airtermination for all models is
a 2-in.PVC coupling with a wind deflectorvane (provided) attached.
Cut a21/4-in. length of 2-in. PVC pipe.Connect this pipe and
another 2-in.PVC coupling to the coupling at thewall. The outer
coupling mustterminate 4 inches from the wall.
IMPORTANT: To ensure properfurnace operation, the supplied
vanemust be installed in the verticalposition with PVC solvent as
shown inFigure 20, Detail B.
The combustion air inlet terminalmust be located with respect to
theexhaust terminal as shown in Figure20, Detail C.
IMPORTANT: All furnaces withhorizontal air intakes, except
thoseusing concentric vent kit (-)XGY-E03/E03A, must have a drain
teeassembly and trap installed as closeto the furnace as possible.
This is todrain any water that may be in thecombustion air pipe to
prevent it fromentering the furnace combustionchamber.
These parts are included in kits (-)XGY-D02/D02A (for 2-in.
pipe), (-)XGY-D03/D03A (for 3-in. pipe) and(-)XGY-D04/D04A (special
for the120,000 BTU furnace installed withthe alternate horizontal
termination).Attach the trap to the bottom of thetee with PVC
solvent. Connect theother end to a suitable drain, as to
thedownstream of a condensate trap onthe furnace.
STANDARD VERTICALTERMINATIONS
EXHAUST VENT PIPING
Vertical through-the-roof ventapplications do not require
anexhaust terminal. The exhaust ventmust terminate at least 12
inchesabove the combustion intake air
termination. The exhaust vent formodels with inputs of 90,000
through120,000 BTUH is 2-in. PVC pipe120,000 BTUH models
withexcessively long runs require 21/2”.Refer to Table 4 for
properapplication. This mustbe reduced to 11/2“ the last12 inches
for models with inputs of45,000 through 75,000 BTUH.See Figure
19.
STANDARD HORIZONTALTERMINATIONS
EXHAUST PIPING
For direct vent systems the standardtermination is 2-in. PVC
pipeextending 12 inches from the wall forfurnaces with inputs from
105,000 to120,000 BTUH. Install a 2-in. couplingat the outside wall
to prevent thetermination from being pushedinward. When 3-in. pipe
is usedbetween the furnace and outside wall,reduce to 2 inches
before penetratingthe wall. The standard termination is11/2 -in.
PVC pipe extending outward12 inches from the wall for modelswith
inputs of 45,000 to 75,000BTUH. Install a 2-in. to 11/2-in.coupling
at the outside wall to preventpushing the termination back into
thewall. See Figure 20, Detail A.
The combustion air and exhaustterminations must be at least
12inches above grade and must beoriented with respect to each other
asshown in Figure 20, Detail B. Refer tosection on alternate
venting optionswhen higher snow levels areanticipated.
ALTERNATETERMINATIONSALTERNATE HORIZONTALDIRECT VENT
TERMINATIONS
(-)XGY-D02/D02A, -D03/D03A AND -D04/D04A
The combustion air and exhaustterminations may be raised
amaximum of 24 inches above thewall penetration to maintain
therequired 12 inch clearance abovegrade or snow level. See Figure
17.Size the pipe length according toTable 4 and Table 5.
Review the following guidelines:
• Size the entire vent systemaccording to the alternate,
notstandard, termination shown inTable 4 and Table 5.
allowable length in feet of the exhaustand combustion air intake
pipes thatmay be used for all furnace inputs asrelated to the
number of elbowsrequired and the termination (seeshaded area).NOTE:
Extend the exhaust a minimumof 18" from the furnace top platebefore
turning vent.8. The maximum exposed vent
length (above the roof line) is 30”.
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25
FIGURE 17ALTERNATE HORIZONTAL DIRECT VENT TERMINATION
SEE DETAIL A
24” MAX.
PIPESUPPORTSTRAP
3” MAX.NOTE: 3-1/2”MAX. WHEND04 KIT ISUSED.
EXHAUST VENT21/2" PVC FOR MODELS WITH 120,000 BTU INPUT(KIT NO.
(-)XGY-D04)
2" PVC FOR MODELS WITH INPUTS OF 90,000 AND120,000 BTU. REDUCE
TO 11/2" FOR MODELS WITHINPUTS OF 45,000 THRU 75,000 BTU (SEE
DETAIL A).ELBOWS AND RISERS ARE 2" PVC.
INTAKE VENT21/2" PVC FOR MODELS WITH120,000 BTU INPUT.2" PVC
ELBOWS AND RISERMODELS WITH INPUTS OF 45,000THRU 105,000 BTU.USE
KIT NO. (-)XGY-D02/D02A WHEN 2"PIPE IS USED BETWEEN FURNACE
ANDOUTSIDE WALL. USE KIT NO. (-)XGY-D03/D03A WHEN 3" PIPE IS
USED.
I339
• Insulate the entire length of ventpipe, between the elbow
where thepipe exits the wall and the elbowwhere the termination is
made, witha closed-cell insulation, such as“Arm-a-Flex” or
“Rub-a-Tex” with aminimum of 1/2” thickness.
• All elbows installed on the exteriorof the building must be of
the longsweep nature.
• As required for the horizontal pipingran within the structure,
any piperan horizontal outside the structuremust slope upward a
minimum of1/4” per foot run so that condensatedrains toward the
furnace.
From the top elbow in the exhaustpipe, extend a length of PVC
pipeoutward so that it terminates exactly12 inches from the wall.
See Figure17. Reduce the exhaust pipeextension to is 11⁄2 inch pipe
for45,000 BTUH through 75,000 BTUHunits.
The 45,000 BTUH unit only uses kit (-)XGY-D02/D02A. The 60,000
BTUHand 75,000 BTUH downflow onlyunits may use kits
(-)XGY-D02/D02Aor (-)XGY-D03/D03A depending onpipe lengths and
number of elbows.Use kit (-)XGY-D03/D03A with 90,000BTUH downflow
through 120,000BTUH units or upflow 90,000 or120,000. The
(-)XGY-D04/D04A kitonly applies to the 120,000 BTUHunit using an
alternate terminationand excessively long runs. SeeTable 4.
The following are parts lists for the (-)XGY-D02/D02A,
(-)XGY-D03/D03Aand (-)XGY-D04/D04A alternatehorizontal direct vent
termination kits:
(-)XGY-D02/D02A1. 2-in. tee with reducer assembly2. 1⁄2-in. PVC
6-in. dia. trap3. PVC vane4. 2-in. PVC elbow5. 11⁄2-in. PVC nipple
with coupling6. PVC strap7. vent template
(-)XGY-D03/D03A1. 3-in. tee with reducer assembly2. 1⁄2-in. PVC
6-in. dia. trap3. PVC vane4. 2-in. PVC elbow5. PVC strap6. vent
template
(-)XGY-D04/D04A1. 21⁄2-in. PVC elbow2. 3" x 21⁄2" PVC bushing3.
21⁄2" x 61⁄2" long PVC pipe4. 21⁄2" x 16" long PVC pipe5. 21⁄2" x
21" long PVC pipe6. PVC vane7. 3-in. tee with reducer assembly8.
6-in. dia. 1⁄2-in. PVC trap9. PVC strap10. vent template
NOTE: The (-)XGY-D04/D04A kit onlyapplies to the 120,000 BTUH
unitusing an alternate termination andexcessively long runs.
3”
4”EXHAUST VANE
INTAKE OPTIONALINTAKE
DETAIL BEXHAUST / INTAKE RELATIONSHIP
DETAIL AEXHAUST VENT FOR
MODELS WITHINPUT OF 45,000 THRU
75,000 BTU
DETAIL CCOMBUSTION AIRTERMINATION
4" FROMWALL
12"FROMWALL
1-1/2"PIPE
12" FROMWALL
(-)XGY-D02A1. 2” Tee assembly w/1⁄2” drain
connection2. 1⁄2” PVC-5” diameter trap3. Wind deflector vane4.
Vent template
(-)XGY-D03A1. 3” Tee assembly w/1⁄2” drain
connection2. 1⁄2” PVC-5” diameter trap3. Wind deflector vane4.
Vent Template
(-)XGY-D04A1. 3” Tee assembly w/1⁄2” drain
connection2. 1⁄2” PVC-6” diameter trap3. Wind deflector vane4.
Vent template
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26
FIGURE 18CONCENTRIC VENT KIT NO. (-)XGY-E03A
SIDEWALL ASSEMBLY
ROOF INSTALLATION
1" MAXIMUM
FIELD-SUPPLIEDSTRAP
ITEM No. DESCRIPTION
A 2.5" PVC PIPE SCHEDULE 40 -- 37.125" LONG
B 4" PVC PIPE SCHEDULE 40 -- 24" LONG
C 3" x 3" x 4" SPECIAL CONCENTRIC FITTING
D 3" x 45° STREET ELBOW (FIELD SUPPLIED)
E PVC RAINCAP
E
B
A
C
D
E
B
A
C
D
CONCENTRIC TERMINATIONSVERTICAL/HORIZONTAL CONCENTRIC VENTKIT
NO. (-)XGY-E03A
This kit is for vertical/horizontalintake air/vent runs and may
beinstalled through roofs or sidewalls.One 5” diameter hole is
required forthe installation. See Figure 18 forthe general layout.
Completeinstallation instructions are includedwith the kit.
MAINTAIN 12 IN.MINIMUM CLEARANCEABOVE HIGHESTANTICIPATED
SNOWLEVEL. MAXIMUM OF24 IN. ABOVE ROOF.
NOTE: • Support must be field installedto secure termination kit
to structure.
• No screens may be used to covercombustion air and exhaust.
NOTE: The following IPEX brandconcentric termination (System
636)may be purchased in the field andused in place of factory
supplied kits:
3” Concentric Kit – Item # 196006
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27
FIGURE 19STANDARD VERTICAL DIRECT VENTING
FIGURE 20STANDARD HORIZONTAL DIRECT VENTING
I407
3" MAX.SEPARATION
36" MAX. COMBUSTION AIRPIPE
12" MIN.SEPARATION
12" MIN. ABOVEROOF LEVELROOF LINEEXHAUST PIPE
COMBUSTION AIR PIPE
SUPPLY AIR
RETURN AIR
EXHAUST VENT
3"MAX.
EXHAUSTVENT
ROOF LINE
COMBUSTIONAIR PIPE
12"MIN.
12"MIN.
ANTICIPATEDSNOW LEVEL
COMBUSTIONAIR PIPE
3"MAX.EXHAUST
VENT
12"MIN.
12"MIN.
3"
MAX.
12" MIN
. 12" MIN
. ABOVE
ANTICIPA
TED SN
OW LEVEL
NOTES:
1 INCREASE THE 12-IN. MINIMUMTO KEEP TERMINAL OPENINGABOVE
ANTICIPATED LEVEL OFSNOW ACCUMULATION WHEREAPPLICABLE.
2 WHEN 3-IN. DIAM. PIPE IS USED,REDUCE TO 2-IN. DIAMETER
BEFOREPENETRATING ROOF. A MAXIMUMOF 18 IN. OF 2-IN. PIPE MAY BEUSED
BEFORE PASSINGTHROUGH ROOF.
3 SUPPORT VERTICAL PIPE EVERY 6FEET.4 EXHAUST TERMINATION -
TERMINATETHE LAST 12 INCHES WITH 2” PVC PIPE
ON 90,000 AND 120,000 BTUH MODELS.REDUCE AND TERMINATE THE
LAST12 INCHES WITH 11/2” PVC PIPE ON45,000 THROUGH 75,000
BTUHMODELS. SEE DETAIL A.
5 30” MAXIMUM EXPOSED VENTLENGTH.6 THE COMBUSTION AIR PIPE
MUSTTERMINATE IN THE SAME PRESSURE
ZONE AS THE EXHAUST PIPE.
7 NO SCREENS MAY BE USED TOCOVER COMBUSTION AIR ANDEXHAUST.
PITCHED ROOF INSTALLATIONS
NOTES:
1 SUPPORT HORIZONTAL PIPEEVERY FOUR FEET.2 WHEN 3 IN. PIPE IS
USED REDUCE TO 2 IN.BEFORE PENETRATING OUTSIDE WALL.3 18 IN.
MAXIMUM. 2 IN. DIAMETER PIPE MAYBE USED INSIDE THE WALL.4 DETAIL
“A” - EXHAUST TERMINATIONTERMINATE THE LAST 12 INCHES WITH 2”
PVC PIPE ON 90,000 AND 120,000 BTUHMODELS. REDUCE AND TERMINATE
THELAST 12 INCHES WITH 11/2” PVC PIPE ON45,000 THROUGH 75,000 BTUH
MODELS.
5 INCREASE THE 12 IN. MINIMUM ABOVEGRADE TO KEEP TERMINAL
OPENINGSABOVE ANTICIPATED LEVEL OF SNOWACCUMULATION WHERE
APPLICABLE.
6 DETAIL “B”, INSTALL WIND DEFLECTORVANE IN 2 IN. PVC COUPLING
IN VERTICALPOSITION USING PVC SOLVENT.THE COMBUSTION AIR
TERMINATION MUSTBE IN THE SAME PRESSURE ZONE AS THEEXHAUST
TERMINATION.
7 THE COMBUSTION AIR PIPE MUSTTERMINATE IN THE SAME PRESSUREZONE
AS THE EXHAUST PIPE.
8 NO SCREENS MAY BE USED TO COVERCOMBUSTION AIR AND EXHAUST.9 NO
ELBOWS CAN BE INSTALLED ATTERMINATION.
3”
12”
4”
4”
SEE DETAIL A
VANE 2” PVCCOUPLING
12” MIN. ABOVEGRADE LEVEL 5
SEE DETAIL B
2” OR 3” TEEW/DRAIN TRAP
RETURN AIR
TRAP
SUPPLY AIR
EXHAUST PIPE
COMBUSTION AIR PIPE
CONNECTTO DRAIN
12�