-
Owners Manual/Installation InstructionsCMF80-PG Convertible (65,
75, and 90 KBTU/H Inputs),CMF 100-PG (90 KBTU/H Input)CMF80-PO
Convertible (65, 75, and 90 KBTU/H Inputs),CMF 100-PO (90 KBTU/H
Input)
Counterflow Gas or Oil Heating Appliance
Read all instructions carefully before beginning the
installation. Read all labels and tagson the furnace carefully and
follow all precautions outlined on those labels and tags.
FOR YOUR SAFETYDo not store or use gasoline or otherflammable
vapors and liquids in thevicinity of this or any other
appliance.
! WARNING:Improper installation, alteration, ser-vice or
maintenance can cause injuryor property damage. Refer to thismanual
for assistance or consult aqualified installer, service agency,
orthe gas supplier for additional infor-mation.
FOR YOUR SAFETYWHAT TO DO IF YOU
SMELL GAS• Do not try to light any appliance.• Do not touch any
electric switch; do not
use any phone in your building.• Immediately call your gas
supplier from a
neighbor’s phone. Follow the gas supplier’sinstructions.
• If you cannot reach your gas supplier, callthe fire
department.
Rated CMF-PG CMF-PO CMF-PG CMF-POBTUH 80 CONV. 80 CONV. 100
100Input 75,000 75,000 90,000 90,000
Output 56,000 60,000 68,000 72,000
GENERALCMF furnaces are high quality, direct ventfurnaces used
for manufactured housing, rec-
reational vehicle, and residential† applications.These furnaces
are offered in either power gas(designated by PG) or power oil
(designated byPO) models. The power gas models are de-signed for
operation with either natural or pro-pane (LP) gas.
The CMF series is convertible from power oil topower gas, and
vice versa. Furthermore, thefiring rate of the CMF80 Convertible
Series canbe changed using a certified NORDYNEconversion kit
field-installed by a qualified servicetechnician. Refer to the
“Firing Rate Conversion”section later in these instructions for
moreinformation on the firing rate change.
These furnaces are certified to the UL307standards (UL 307A for
oil models; UL 307B forgas models), and can be installed in a
variety ofapplications, as shown in Table 1. This furnaceis not to
be used for temporary heating ofbuildings or structures under
construction.
! WARNING:This furnace must be installed by a quali-fied
installing agency and in accordancewith applicable local codes and
ordi-nances that govern this type of equip-ment. Failure to
properly install the fur-nace, base assembly, and venting sys-tem
as described herein may damage theequipment and/or the home, can
create afire or asphyxiation hazard, violates U.S.listing
requirements, and will void thewarranty. This furnace is NOT
approvedfor installation with split system air con-ditioning. Use a
NORDYNE packaged airconditioning system.
-
2
! WARNING:Do not use this appliance if any part hasbeen
submerged under water. Immedi-ately call a qualified service
technician toinspect the appliance and to replace anypart of the
control system and any gascontrol that has been submerged
underwater.
INSTALLATION REQUIREMENTS
Equipment CheckAll units are securely packaged at the time
ofshipment and should be carefully inspectedupon arrival for
damage. Claims for damages(apparent or concealed), shortage in
shipment,or nondelivery should be filed immediately againstthe
carrier by the consignee. The carrier isresponsible for making
prompt inspection ofdamage and for a thorough investigation ofeach
claim. The manufacturer will not acceptclaims for transportation
damage.
Requirements and Codes:Installer shall be familiar with and
comply with allcodes and regulations and applicable to
theinstallation of these heating appliances andrelated
equipment.
All manufactured housing installations mustconform with these
instructions, all applicablelocal codes, ANSI Z223.1/NFPA 54
(NationalFuel Gas Code), ANSI/NFPA 31 (Installation ofOil Burning
Equipment), ANSI/NFPA 70(National Electrical Code), the
ManufacturedHome Construction and Safety Standard, Title24 CFR,
part 3280, or when this standard is notapplicable, the standard for
Manufactured Home
Installations (Manufactured Home Sites,Communities, and
Set-ups), ANSI 225.1.
All residential installations (Refer to Table 1)must conform
with these instructions, allapplicable local building codes, ANSI
Z223.1/NFPA 54 (National Fuel Gas Code), ANSI/NFPA 31 (Installation
of Oil-Burning Equipment),ANSI/NFPA70 (National Electrical Code),
andNFPA 211 (Chimneys, Fireplaces, Vents, andSolid Fuel-Burning
Appliances).
The National Fuel Gas Code is available bywriting:
American National StandardsInstitute, Inc.1430 BroadwayNew York,
NY 10018
NFPA publications are available by writing:
National Fire Protection AssociationBatterymarch ParkQuincy, ME
02269
Combustion Air and VentilationRequirementsProvisions for
adequate combustion air andventilation air must be in accordance
with theANSI Z223.1/NFPA 54, (National Fuel GasCode), ANSI/NFPA 31
(Installation of Oil BurningEquipment), and all applicable local
codes.
Depending upon the type of installation (SeeTable 1), the CMF
furnace can draw thecombustion air either from outside the
home(direct vent) or from the space being conditioned.A direct vent
system is one in which the flueproducts are exhausted to and the
combustionair is drawn from outside the house. A directvent system
can also be referred to as a sealedcombustion system.
Type of Ducted Direct Vent Furnace Flue ProductsInstallation
Application System Required Base Used Exhausted By
ManufacturedHousing or Yes Yes
Recreational Vehicle
MA-100 or MA-200 NORDYNE SRJ Roofjack or
Universal Base an Existing Chimney*
CB-200A Cottage NORDYNE SRJ Roofjack or
Base an Existing Chimney*
CB-200A Cottage NORDYNE SRJ Roofjack orBase an Existing
Chimney*
†Residential is only defined as a single-story non-manufactured
housing installation.
*Refer to the "Venting Requirements" section later in these
instructions for more details on properly venting this appliance
through an existing chimney.
MA-100 or MA-200Universal Base
NORDYNE SRJRoofjack Only
Yes
No
Yes
YesResidential†
Residential†
Residential†
Yes
No
Table 1
-
3
For direct vent applications either the combustionair duct
provided with the MA Series base kit orthe direct vent kit can be
used. The direct ventkit must be ordered separately. Only for
aspecial CB-200A cottage base installation canthe CMF draw the
combustion air from theconditioned space. The CB-200A cottage
basekit must be ordered separately. Refer to thereplacement parts
listing provided with thefurnace to order the direct vent kit or
the cottagebase kit. Follow the instructions provided withthe kits
for proper installation.
When unsure about combustion air supplyavailability, a direct
vent system should beused. For small rooms, confined spaces,
tightconstruction or similar situations in which thecombustion air
requirements of the furnacemight not be met, a direct vent system
must beused. The air openings in the door of the unit andthe warm
air registers from the ductwork orbase must not be restricted.
Combustion air must not be drawn from acontaminated atmosphere.
Excessiveexposure to contaminated combustion air willresult in
safety and performance relatedproblems. Some examples of
chemicalcontaminants are chlorine, fluorine, and sulfur,which can
be found in a wide variety of somecommon commercial and household
products.
The installation of the furnace must allow for anadequate supply
of combustion air. Thecombustion air opening of the furnace must
bedesigned and located to prevent blockage bysnow.
When drawing the combustion air fromunderneath the home, ensure
that a vent or ductof at least 18 square inches of free area
isprovided from outside. Check to ensure that thecombustion air
opening is unobstructed. Whenusing the combustion air duct, ensure
that itextends through the floor. When using thedirect vent kit,
the combustion air opening mustbe located in the same pressure zone
as the flueexit of the roof jack or chimney. Refer to
theinstructions provided with the direct vent kit formore
information.
Venting Requirements — ManufacturedHousing InstallationsFor all
manufactured housing applications, theCMF furnace must be vented
using the SRJseries roofjack. The instructions for selectingthe
proper roofjack for your installation aredetailed later in these
instructions.
Venting Requirements — ResidentialInstallations
! WARNING:This furnace is not to be connected to achimney flue
serving a separate appli-ance designed to burn solid fuel.
For residential applications (Refer to Table 1),the CMF furnace
may be vented through theSRJ series roofjack or through an
existingchimney. If the SRJ roofjack is to be used, thenthe
instructions for selecting the proper roofjackfor your installation
are detailed later in theseinstructions. If venting through an
existingchimney, then the venting system used must bein accordance
with these instructions, allapplicable local building codes, ANSI
Z223.1/NFPA 54 (National Fuel Gas Code), ANSI/NFPA 31 (Installation
of Oil-Burning Equipment),and NFPA 211 (Chimneys, Fireplaces,
Vents,and Solid Fuel-Burning Appliances).
! WARNING:When venting through a chimney, checkthe chimney for
soot, leaks, obstruc-tions, and proper installation.
The materials used to construct the ventingsystem must be
capable of withstandingexposure to temperatures of at least 700
degreesF. The existing chimney servicing this furnacemust be
vertical. Horizontal distances to anexisting chimney must be as
short as possible,and the connecting pipe must slope upward tothe
chimney at not less than a 45 degree angle.The total length of the
sloping pipe must notexceed 6 feet. The venting system must haveno
obstructions or sharp bends where soot andother foreign matter can
accumulate.
If an inspection determines that the chimney isobstructed, the
chimney must be cleaned.Furthermore, the connecting flue pipe must
becleaned or replaced.
For ONLY a CMF power oil furnace installationvented into an
existing chimney, a barometricdamper can be installed at the vent
connectionof the furnace to regulate the draft. The
barometricdamper must be properly installed per themanufacturer’s
instructions. Refer to allapplicable codes to determine whether or
not a
-
4
barometric damper can be used for your CMFpower oil furnace
installation. The barometricdamper used must be installed such that
airfrom the conditioned space can only enter theflue passageway. Do
not use a double actingbarometric damper. All flue pipe joints
should befastened with sheet metal screws for rigidity.
The chimney height, required draft, and numberof appliances
served by the chimney must bein accordance with all applicable
codes. Toprevent down draft, the chimney should extendat least two
feet above the peak of the roof.
It is recommended that the furnace flue serveno other
appliances. When the chimney servesonly the furnace, the flue area
must be sizedaccording to all applicable codes. The minimuminternal
area of the flue must be equal to at leastthe area of the furnace
flue exit.
When two or more appliances must vent througha common flue, the
area of the common flueshould be sized in accordance with all
applicablecodes.
When an existing furnace is removed or replacedin a venting
system, then the venting systemmay not be properly sized to vent
the attachedappliances. The venting system must bechecked to ensure
proper venting. Improperlysized venting systems can result in the
formationof condensate, leakage, spillage, et cetera.Refer to the
ANSI Z223.1/NFPA 54, (NationalFuel Gas Code), and ANSI/NFPA 31(
Installationof Oil Burning Equipment) for correcting anyimproperly
operating venting system.
The following steps shall be followed with eachappliance
connected to the venting systemplaced in operation, while any other
appliancesconnected to the venting system are not inoperation:
(a) Seal any unused openings in the ventingsystem.
(b) Inspect the venting system for proper sizeand horizontal
pitch, as required in theANSI Z223.1/NFPA 54, (National Fuel
GasCode) and ANSI/NFPA 31 (Installation ofOilBurning Equipment),
and these instruc-tions. Determinethat there is no blockage or
restriction,leakage, corrosionor other deficiencies which could
cause anunsafe condition.
(c) In so far as is practical, close all buildingdoors and
windows and all doors betweenthe space in which the appliance(s)
con-nected to the venting system are locatedand other spaces of the
building. Turn onclothes dryers and any appliance not con-nected to
the venting system. Turn on anyexhaust fans, such as range hoods
andbathroom exhausts, so they shall operateat maximum speed. Do not
operate asummer exhaust fan. Close fireplacedampers.
(d) Follow the lighting instructions. Place theappliance being
inspected in operation.Adjust thermostat so appliance shall
oper-ate continuously.
(e) Test for draft hood equipped appliancespillage at the draft
hood relief openingafter 5 minutes of main burner operation.Use the
flame of a match or candle.
(f) After it has been determined that eachappliance connected to
the venting sys-tem properly vents when tested as out-lined above,
return doors, windows,exhaust fans, fireplace dampers and anyother
gas burning appliance to their previ-ous conditions of use.
Flashing
BarrelCeiling Plate
VentVentilationKnock-Out
DUCTCONNECTOR
Return AirGrille and Filter
Power SupplyConnection
AccessDoor
Base Pan
Fuel Line
Feeder Duct
CombustionAir Duct
FURNACEASSEMBLY
ROOF JACKASSEMBLY
Combustion AirAdapter (Not Shown)is to be InstalledOver
CombustionAir Duct
Figure 1. Typical Furnace Installation forManufactured Housing
Applications
-
5
(g) If improper venting is observed during anyof the above
tests, the venting systemmust be corrected.
Unit Location and Clearance to AdjacentMaterial RequirementsThe
unit must be installed in a level position. Thefurnace must be
installed with the minimumclearances from adjacent materials as
stated inTable 2. Additional clearance should be providedto permit
servicing of filters, blower, motors,controls, combustion air
connections, and ventconnections.
UNIT INSTALLATIONThese instructions are intended for the use
ofqualified individuals specially trained andexperienced in
installation of this type equipmentand related system components.
Installationand service personnel are required by somegoverning
bodies to be licensed. Persons notqualified should not attempt to
install thisequipment or interpret these instructions.
MA-200 Base InstallationThe MA-200 base is designed for O.E.M.
andreplacement installation of the CMF series fur-nace (see Figures
2 and 3). The warm air ductsystem should be designed so the duct
staticpressure external to the furnace does notexceed the static
pressure listed on the furnacedata label.
Use the base pan to mark the 12-1/8" x 12-1/8" center opening
for the feeder duct. When the4" offset feeder duct is used, the
floor openingwill be offset 4 inches from the opening in themain
duct. If using the combustion air duct,select and knock out the
combustion air open-ing to be used. Then mark the 2-1/4" x
7-1/4"opening for the combustion air duct.
Cut the opening for the feeder duct 14-1/8" x 14-1/8" in
flooring (cutting opening 1" larger all theway will allow the
flanges on the underside of thebase pan to fit in the opening).
If using the combustion air duct, cut the openingfor the duct
about 1/8" larger than the markingon the floor. Be sure to cut
through all insulationand the bottom board so that the combustion
airduct is unobstructed to outside air.
Drill an approximate 1" diameter hole for the fuelline through
the floor and bottom board to theoutside. Fuel lines are not
supplied with thefurnace. They should be installed to complywith
all applicable codes.
Drop transition or offset feeder duct upsidedown through the
floor opening and center thetop of the feeder duct in 14-1/8" x
14-1/8" flooropening. Using the feeder duct as a guide, markand cut
a 12" x 12" opening in the distributionduct. (See Figure 3)
Insert the feeder tabs into the main duct andbend them over
tightly so that the main ductedges are trapped between flanges and
tabs.Metal tape may also be used to ensure an airtight
connection.
** See Item K in the "Closet Installation ofFurnace" section
later in these instruc-tions for clearance less than 6".
Table 2. Minimum Clearancesto Adjacent Materials
Closet AlcoveALL MODELS Installation Installation
Sides 0" 0"Back 0" 0"Front 6"** 18"Top 17" 17"Vent 6" 6"Duct
within 3’ from Furnace 1/4" 1/4"Plenum 1" 1"Roof Jack Barrel 0"
0"
Figure 2. MA-200 Base Pan
FRONT
7-1/8 X 2-3/16 Knock-outsCombustion Air
Feeder Duct Opening
FlueLocation
24-1/8
8-3/8
12-1/8
12-1/8
9-1/8
18-1/4
-
6
Install the base pan around the feeder duct withthe (2) screws
through the holes towards therear of the base pan.
Slit the corners of the feeder duct down to thetop of the base
pan. While the top of thedistribution duct is pulled up with one
hand, benddown each side of the feeder duct tightly to thebase with
the other hand. Trim the metal to allowa one inch flange over the
top of the base panand seal that flange with the metal tape.
If a “V” or “U”-box crossover system is to beused, see the
instructions provided with thecrossover system.
Figure 4. MA-100 Universal Base,Bottom Panel
12-1/8
12-1/8
Feeder DuctOpening
7-1/8 X 2-3/16 Knock-outsCombustion Air
18-1/4
24-1/2
Figure 5. Feeder Duct Installation
Heat Duct Below Joists
Base Feeder Duct
FloorJoists
Cut This Line
Bend OverAlong This Line
1"
Figure 3. Transition and Offset Ducts
Heater Duct Below Joists
Flange
Bend Over Tabs
Base
FloorJoists
Slit 4 CornersBend Down 4 Sides
TRANSITIONDUCT
FloorJoists
Heater Duct Below JoistsBend Over Tabs
Flange
Slit 4 Corners
Base
Bend Down 4 Sides
MA-100 Universal Base InstallationThe MA-100 base is designed
primarily forreplacement installation of the CMF series fur-nace
where the manufactured home duct sys-tem may be small and
restrictive to proper airflow. The MA-100 base provides
approxi-mately four (4) inches of additional plenumspace before the
discharge air enters the manu-factured home duct system. (See
Figures 4and 5)
Use the bottom panel of the base assembly tomark the 12-1/8" x
12-1/8" center opening forthe feeder duct. If using the combustion
air duct,select and knock out the combustion air open-ing to be
used. Then mark the 2-1/4" x 7-1/4"opening for the combustion air
duct.
Cut the opening for the feeder duct 14-1/8" x 14-1/8" in
flooring (cutting opening 1" larger all theway around 12-1/8" x
12-1/8" template mark-ing). This will allow the four flanges on
theunderside of the panel to fit into the opening.
If using the combustion air duct, cut the openingfor the duct
about 1/8" larger than the markingon the floor. Be sure to cut
through all insulationand the bottom board so that the combustion
airduct is unobstructed to the outside air.
Drill a 1" hole for the fuel line through the floor andbottom
board to the outside. Fuel lines are notsupplied with the furnace.
They should beinstalled to comply with local codes.
Put the bottom base panel in place (See Figure5). Drop the
transition feeder duct upside downthrough the opening and mark a
12" x 12"opening to be cut into the distribution duct.Remove the
bottom panel and transition feederduct; then cut the opening into
the distributionduct.
-
7
Damper InstallationAn automatic shut-off damper is available
(seereplacement parts list). An automated shut offdamper is
required when the home is air con-ditioned by a self-contained
unit. This damperis designed to fit in the feeder duct
cavity,directly under the furnace. A damper is requiredto prevent
chilled air from flowing over thefurnace heat exchanger. For proper
installa-tion, refer to the instructions provided with
thedamper.
Installation of Furnace onto the MA-200BaseLift the furnace over
the base so that the flangeat the back comes to rest on the inside
rails ofthe base.
Raise the front of the furnace to clear the gasketon the bottom
of the furnace and slide the backuntil the rear flange drops into
the channel at therear of the base. Be careful not to damage
thecombustion air adapter, if present, while posi-tioning the
unit.
Be sure that the furnace is all the way back soas to engage the
tabs on the rear flange on thebase.
Open the access door. Fasten the front of thefurnace and the
base to the floor with #8 x 1/2"long sheet metal screws.
Using the provided hose clamp, secure theflexible combustion air
tubing from the burner tothe combustion air adapter.
Installation of Furnace onto the MA-100BaseTilt the furnace
forward and carefully work thefurnace back over the MA-100
Universal base.
Lift the furnace as necessary when positioningthe unit over the
base assembly to prevent anydamage to the feeder duct assembly and
com-bustion air adapter, if present.
Be sure the furnace is positioned all the way tothe back of the
base assembly.
Open the furnace door and fasten the furnaceto the base using #8
x 1/2" long sheet metalscrews.
Install the feeder duct by bending the tabs insidethe heat duct
and using the metal tape to insurean airtight connection.
Set the bottom base panel over the feeder duct.Slit the corners
of the feeder duct down to thetop of the base. While the top of the
distributionduct is pulled up with one hand, bend down eachside of
the feeder duct tightly to the base with theother hand. Trim the
metal to allow one inchflange over the top of the base and seal
thatflange with the metal tape.
Secure the top panel to the floor with two (2)screws through the
front flange.
If a “V” or “U”-box crossover system is to beused, see the
instructions provided with thecrossover system.
Combustion Air Duct/Pipe InstallationThe CMF furnace must draw
the combustion airfrom outside, except for special
installations(See Table 1). This can be accomplished eitherby using
the 2”X7” rectangular combustion airduct provided in the MA series
base kits or usingthe direct vent kit.
When the rectangular combustion air duct is tobe used, install
the combustion air duct throughthe selected knockout in the base.
For directvent applications, the rear knock-out in thefurnace base
cannot be used. After thecombustion air duct has been positioned,
installthe combustion air adapter. This adapter willtransition the
2”X7” opening of the combustionair duct to the 2” diameter of the
burner flexibletubing. This adapter is included in the MA
seriesbase kits. For retrofit applications in which theMA series
base is already installed, thecombustion air adapter can be ordered
as a kit.Refer to the Replacement Parts List for moredetails on
ordering this kit.Secure the adapter with either wood or
metalfasteners (field provided), depending upon theparticular
installation. Ensure that the gasketfor the adapter is positioned
properly beforeinstalling the adapter. Attach the flexible hosefrom
the burner to the combustion air adapterusing the provided metal
hose clamp.
When the direct vent kit is used, follow theinstructions
provided with the kit. Note: Thedirect vent kit should be installed
beforepositioning the furnace on the base.
-
8
Using the provided hose clamp, secure theflexible combustion air
tubing from the burner tothe combustion air adapter.
CB-200A Cottage Base InstallationThe CMF can be installed on a
CB-200A cottagebase in certain applications, as described earlierin
these instructions (See Table 1). Refer to theReplacement Parts
List for information onordering this base. For installation, refer
to theinstructions that are provided with the CB-200Abase kit.
Closet Installation of the FurnaceReturn air systems for a
closet installation of thefurnace may consist of a grille or
grilles in acloset door or side wall thatcommunicates with the
living area of the home.(See Figure 6) Return air openings should
notbe located to draw air directly from a bathroom.Grilles placed
in a side wall require a 6" clear-ance from the wall to the furnace
so that the airmay enter the front grille of the furnace.
Inaddition, all return air systems, including thefloor and ceiling
systems, must meet the follow-ing conditions:
A. The return-air opening into the closet,regardless of its
location, is to be a mini-mum of 200 square inches.
B. If the return-air opening is located in thefloor of the
closet (versus the vertical frontor side wall), the opening is to
be providedwith means to prevent its inadvertent clo-sure by a flat
object placed over the open-ing.
C. The cross-sectional area of the returnduct system (when
located in the floor orceiling of the manufactured home)
leadinginto the closet is to be not less than 200square inches.
D. The total free area of the openings in thefloor or the
ceiling registers serving thereturn air duct system is to be not
less than300 square inches. At least one suchregister is to be
located where the likeli-hood of its being covered by
carpeting,boxes, and other objects is minimized.
E. Materials located in the return duct systemshall have a flame
spread classification of200 or less.
F. Noncombustible pans having one inchupturned flanges are
located beneathopenings in a floor return duct system.
G. Hollow spaces used as ducts or plenumsfor environmental air
may contain mineral-insulated metal sheathed cable,
aluminumsheathed cable, electrical metallic tubing,rigid metal
conduit, flexible metal conduitnot to exceed four (4) feet, or
metal-cladcables. Wiring materials, fixtures, are tobe suitable for
the expected ambienttemperatures to which they will be
sub-jected.
H. Gas piping cannot be located in the returnduct system.
I. The negative pressure in the closet mustnot be less than
minus 0.05 inches watercolumn with the closet door closed and
thefan operating at high speed. A readingbelow minus 0.05"
indicates a dirty filter ora restricted return air system.
Figure 6. Closet Installation
-
9
J. For floor return systems, the manufac-tured housing
manufacturer or installershall affix a prominent marking on or
nearthe appliance where it is easily read whenthe closet door is
open. The marking shallread: “CAUTION, HAZARD OF AS-PHYXIATION. DO
NOT COVER ORRESTRICT FLOOR RETURN AIR OPEN-ING.” or equivalent.
(This label is suppliedwith the instruction manual in each
fur-nace.)
K. For closet installation with less than 6"front clearance, but
not less than 1", alouvered door must be used having aminimum 200
square inch free area open-ing directly in line with openings in
thefurnace door. A fully louvered door havingthe minimum free area
is also permitted if
the front tolerance is not less than 4".Adjust duct registers to
obtain a tempera-ture rise within the range specified on thefurnace
nameplate.
! WARNING:Failure to comply with the above proce-dure and the
following instructions mayresult in fire, asphyxiation or
carbonmonoxide poisoning.
SRJ Roof Jack InstallationRefer to Figure 7 to determine SRJ
roof jackand appropriate accessories required foryour
installation.
Furnace Base Package for O.E.M. and replacement installations .
Model No. MA-200
See Replacement Parts List for types of Base Packages
offered.
Furnace Base Package for replacement installations
..................... Model No. MA-100
See Replacement Parts List for types of Base Packages
offered.
RA-S4
RA-S3
RA-S2.5
4/12
3/12
2-1/2/12
None Flat
SRJ1 & SRJ2 Models are one piece constructionSRJ3, SRJ4,
& SRJ5 Models are two piece construction-C Models are two piece
construction
OPTIONAL:Raised Inlet Models (-C)RoofJack Adaptor (Use to mount
roofjack on pitched roof)Protective Cap (Use when top of roofjack
is removed)
Use AdaptorModel No.
When roof pitch is: 1/2 Minimum
FurnaceCMF Series
57"
Add -C for Raised Inlet ModelsExample: SRJ3-34-C
And Ceiling Height is:Add Suffix
For Vent Pipe
7'-28
7'6"-34
8'-40
Ceiling Trim Plates
When Ceiling Cavity is:
Use Roof Jack Model No.
49" to 59"
37" to 48"
SRJ5
25" to 36"
13" to 24"
12" or Less
SRJ4
SRJ3
SRJ2
SRJ1
Adaptor
14" Removable SRJ3, SRJ4, & SRJ525" Removable All -C
Models
Figure 7. Selection of Roof Jack and Accessories Chart
-
10
! WARNING:1. The roof jack and vent pipe as deter-
mined from the chart on in Figure 7must be applied.
2. The indicating line near the bottom ofthe roof jack must
extend below thefinished ceiling.
3. The vent pipe must be attached to thefurnace flue collar with
the sheet metalscrew provided.
4. DO NOT install any elbows (adjust-able or non-adjustable) or
a stackdamper in the venting system.
NOTICE: Accuracy in locating the base panand the roof jack
openings with respect to theflue outlet is required to avoid
hazardous mis-alignment of the air and vent systems. (SeeFigure
1)
Use only the SRJ series roof jack as specifiedon the furnace
label.
Cut an approximate 8-1/4" diameter openingthrough the roof and
ceiling directly in line withthe flue connection on the top of the
furnace.
A roof jack adaptor is required for use on asloping roof. Center
the adaptor opening overthe roof opening, use sealant or caulking
underthe adaptor. Use roofing nails or screws onwood construction
or sheet metal screws onmetal roofs (caulking, nails or screws not
pro-vided).
Insert the vent pipe into the bottom of the roofjack; locking
slot, downward, toward the fur-nace. Slide the pipe into the roof
jack to a lengththat will allow a convenient reach to the
connec-tion at the top of the furnace.
Ease the roof jack assembly through the open-ings. The lower
portion of the outer barrel mustextend through the finished ceiling
as indicatedon the barrel. Use sealant or caulking on theroof or
adaptor to seal under the flashing of theroof jack assembly.
Extend the vent pipe down to engage the lockingslot with the
screw in the top of the furnace fluepipe. Turn to lock and tighten
the screw. Alljoints and connections should be inspectedbefore
start up of the furnace. (See Figures 8& 9)
Fasten the ceiling trim/fire stop plates aroundthe upper barrel
with four nails or wood screws(not provided).
NOTE: Model SRJ-3, 4, and 5 roof jackspermit the top section to
be removed for transitof the dwelling. If the top is removed,
remainingopenings must be sealed from rain, debris, etc.,until the
top is replaced. A plastic accessorycap is to be fastened to the
lower roof jacksection with the same screws used to mount theroof
jack cap assembly. (See Figure 8)
Figure 8. Roof Jack Figure 9. Vent Pipe Installation
VENT PIPE
SLIDE DOWN TOENGAGE SCREW
FLUE PIPEOF FURNACE
TURN TO LOCK-TIGHTEN SCREW
������
����������
��������
Insert Sliding Pipe
Fasten CeilingTrim Plates
Ceiling
Roof
Roof Jack Adaptor
Install With LineBelow Ceiling
Remove three screwsto separate two piecemodels; replace
withprotective cap fortransit only
Fasten roof flashing to adaptoror flat roof; apply sealant
orcaulking underneath
Fasten adaptor to sloped roof; applysealant or
caulkingunderneath
������
-
11
IMPORTANT: When the top section of theroof jack is removed for
transit, a special warn-ing label must be attached adjacent to the
fuelline connection of the gas or oil burner. Thespecial warning
label is suppled with two pieceroof jack assemblies.
Chimney InstallationWhen venting the CMF through an
existingchimney, the materials, sizing, and installationof the
chimney must be in accordance with theANSI Z223.1/NFPA 54,
(National Fuel GasCode), ANSI/NFPA 31(Installation of Oil Burn-ing
Equipment), NFPA 211 (Chimneys, Fire-places, Vents, and Solid
Fuel-Burning Appli-ances) and all applicable local codes.
Thematerials used must be capable of withstandingexposure to
temperatures of at least 700°F .
The CMF power gas units are fan-assisted.
Installation of Ventilaire III or IV AirQuality Package
(Accessory)The Ventilaire air quality packages are availableto meet
the ventilation requirements as outlined
VENT PIPE
3 FEET MIN.
ROOF JACK ASSY.
ROOF CAP ASSY.
FLEX DUCT
CEILING TRIM COLLAR
CONNECTORDRAW BAND
DRAW BAND
FURNACE
Figure 10. Typical Installation
FURNACE
CAUTIONMAINTAIN 2 1/2" MINIMUM CLEARANCEBETWEEN FLUE PIPE AND
FLEX DUCT.FAILURE TO COMPLY WITH THISRESTRICTION COULD
CAUSEEQUIPMENT DAMAGE. VENTILAIRE IIIILLUSTRATED OTHER
LISTEDVARIATIONS AVAILABLE. CHECK WITHMANUFACTURER.
VentilAire III
VentilAire IV
Figure 11. VentilAire III and IV
-
12
Table 3. Pipe Length Selection Chart
Type ofPipe
Black IronPipe for 20’ _ 60’ 100’
Natural Gas
Aluminum or
Copper Tubing* 10’ _ 30’ _
for Natural GasAluminum or
Copper Tubing _ 40’ 100’ _for LP Gas
*Copper tubing should be internally tin coated.
1/2" 5/8" 3/4" 1"
Maximum Possible PipeLength Required for Different
Pipe Diameters
in H.U.D. Standard Part 3280.103 (b) (2). Thesepackages
introduce outdoor air into the livingspace during furnace blower
operation. TheVentilAire IV also serves to exhaust moist and/or hot
air from the attic space. See Figures 10and 11 for typical
installation. Completeinstallation instructions are supplied with
eachair quality package.
FUEL CONNECTIONS
Gas Piping Requirements - PG Series OnlyGas piping should be
sized and installed inaccordance with local codes ANSI Z223.1/NFPA
54 (National Fuel Gas Code) and utilityregulations. To install the
gas supply piping,connect a separate gas line from the gas meterto
the burner with a manual shut-off valveinstalled in the line at the
furnace. This valveshould be readily accessible to shut-off the
gassupply to the furnace in case of an emergencyshutdown. When
installing the gas supply line,always use new clean piping and
route the linein such a manner as to be easily accessible.The
piping and threading must be free fromcutting burrs and defects.
The line must bedurable, substantial, and gas tight. Installing
atee fitting with a sediment trap at the bottom ofthe riser to
catch any foreign debris in the gassupply line is recommended. An
additional mainmanual shut-off valve may be installed in thegas
supply line to shut-off the main fuel supply,if desired by the
homeowner or required by localcodes.The proper gas supply line size
can bedetermined using the gas piping chart, shownin Table 3. Black
pipe is the most practical fornatural gas, because of the larger
sizes required.Copper tubing with an internal coating of tin
isrecommended for use with propane (LP) gasinstallations. Compounds
used on the threadedjoints must be resistant to the actions of
propane(LP) gases.
Carefully check for gas leaks with a soapsolution or a
commercial leak detector fluid.NEVER USE A MATCH OR OPEN FLAME
TODETECT A GAS LEAK!
! CAUTION:The furnace and its appliance main gasvalve must be
disconnected from the gassupply piping system during any pres-sure
testing of that system at test pres-sures in excess of ½ psi (3.5
kPa). Thefurnace must be isolated from the gassupply piping system
by closing the equip-ment shut-off valve during any pressuretesting
of the gas supply piping system attest pressures equal to or less
than ½ psi(3.5 kPa).
Oil Piping Installation — PO Series OnlyThe following procedures
are recommendedas good practice. However, requirements oflocal
codes and ordinances, H.U.D. Manufac-tured Home and Safety
Standards or NationalFire Protection Association must be
satisfied,where they apply, for an approved installation.
Use a tank capacity suitable for the applicationwith a
weatherproof, capped fill opening and ashielded vent to let in air
as fuel is used. The tankmust be clean inside before filling. All
water,rust, sediment, and other foreign matter mustbe flushed
out.
If a two pipe system is used or if oil is taken fromthe bottom
of the tank, a filter is recommended.Furthermore, a manual shut-off
valve may beused on a single pipe or two pipe system. Pleasenote
that local codes will dictate the specificinstallation
requirements.
-
13
A fuel or tank gauge is recommended for easychecking of the fuel
level. Check the gaugereading with a dip stick.
Locate the storage tank conveniently near thehome. For above
ground fuel tank installations,the tank may rest three to four
inches off theground. Fuel tanks may also be buried ifproperly
coated to resist corrosion. For belowground fuel tank
installations, the vertical di-mension from the bottom of the tank
to the fuelpump must not exceed ten feet. Keep the tankfilled
especially in the summer to reduce theaccumulation of
condensation.
Fuel Line Hook-Up: One Line SystemThe one line system is highly
recommendedwhere vertical lift, from bottom of tank to pump,is not
more than eight feet. A single line hookuphas the advantage of
costing less and givingquieter operation.
Fuel Line Hook-Up: Two Line SystemUse a two line system only if
the vertical liftexceeds 8 feet.
1. Install the oil feed line as outlined in steps1-6 below.
2. Install the oil pump bypass plug in thebottom return
port.
3. Run the return line up through the furnacebase to the return
port of the pump. Runthe other end of the line to the tank,
using3/8" O.D. copper tubing or 1/4" pipe withthe ends capped, and
routing the line so itstays clean.
Figure 12. Recommended Tank Hook-Up200 to 300 Gallon Tank
Drain
End of Oil Supply Line3" to 5" AboveBottom Drain
Guide pipe
GaugeVent with
Cap 2" DuplexBushing 2" Fill
3/8" Oil Supply Line
Note: Additional venting maybe required if tank is filled
rapidly.
4. Insert the return line through the secondopening in the
duplex bushing. If thebottom of the tank is lower than the
pumpintake, the tube should be inserted three orfour inches from
the tank bottom. If thebottom of the tank is higher than the
pumpintake, the return line should extend notmore than 8" inside
the tank.
Hook-Up Procedure (See Figure 12)
1. Use 3/8" O.D. copper tubing for the fuelline. Cap the end
with tape to keep out dirtwhile the line is being routed.
2. Install duplex bushing for two 3/8" lines inthe top fitting
of the tank.
3. Insert one end of the tubing through theduplex bushing until
it is three to five inchesfrom the bottom drain. Tighten the
bush-ing.
4. Run the line where it will not be subject todamage. Also make
bends gradually andavoid kinks which might restrict oil flow.
5. Open the burner access door. Connectthe oil line to the
intake port on the pump.Tighten other port plugs on the pump.
6. Be sure the oil line is airtight! Air leaks cancause the pump
to lose prime and willcreate other problems such as nozzlefailure,
odors, rumbling noise, and falsesafety shut down.
7. Insert the short length of the copper tubelevel with the
bottom of the duplex bushing.Tighten the bushing. Form the tube
into aninverted “U” to serve as a vent.
How to Eliminate Air LeaksTo eliminate problems caused by air in
the oilline, all connections in the oil supply line and allplugs,
nuts, and fittings on the pump must beairtight. This includes the
nut that covers thepressure adjustment. It is important that
thehook-up be done carefully and with a goodflaring tool.
Fuel Oil TypeDo not use fuel oil heavier than Grade No. 2.Grade
No. 1 may be used where the oil supplyis subject to low
temperatures.
-
14
Bur
ner
Plu
g
Rec
epta
cleB
low
er S
peed
Set
ting
Sho
wn
is th
e M
ediu
m S
peed
(see
tabl
e)
Fan
& L
imit
Con
trol
Man
ual S
w.
Fan
Sw
.
If an
y of
the
orig
inal
wire
sup
plie
dw
ith th
e ap
plia
nce
is r
epla
ced,
use
105
C w
ire o
r eq
uiva
lent
.
Lim
itS
w.
Aux
.S
w.
Doo
rS
w.
Rec
pt.
Mot
or
Doo
rS
witc
h
120V
NL1 G
Aux
. Lim
it
Blk
Blk
L112
0V G
N
1 2 3 4 5 6
1 2 3 4 5 6
11 11
Blu
e
Red
Blo
wer
Mot
or
Wht
Wht
Blk
Red
Blu
e
Blk
Wht
Wht
Blk
Red
Blo
wer
Wir
eC
olo
rB
low
erS
pee
d
Blu
e
Bla
ck
Low
Med
.
Hig
h
Rep
rese
nts
Con
trol
Box
Blk
Brn
Brn
Blo
wer
Mot
orC
apac
itor
Bur
ner
Plu
g
L1N
Igni
tion
Tra
nsfo
rmer
Bur
ner
Mot
or
BLA
CK
WH
ITE
OR
AN
GE
Cad
Cel
l
Prim
ary
Con
trol
T2
T1 F F
TE
RM
INA
L H
OU
SIN
G
IGN
ITO
R
CO
NT
RO
LM
OD
ULE
GA
SV
ALV
E
IND
L1 HS
I
HSIG
L2 W PS
I
FS
I
GV
PS
O
FSG
C
WH
ITE
RE
D
RE
D
GR
EE
N
BLU
E
BLU
E
BLA
CK
BLA
CK
BLA
CK
BLA
CK
RE
D
TE
RM
INA
LB
OA
RD
BU
SH
ING
LIN
E C
OR
D
BU
SH
ING
TO
CO
MB
US
TIO
N M
OT
OR
BUR
NER
ELE
CTR
ICAL
BO
X
BU
SH
ING BU
SH
ING
OP
TIO
NA
L 24
V C
OM
MO
N(F
OR
OP
TIO
NA
L A
CC
ES
SO
RY
KIT
S)
C
N L1
GR
OU
ND
SC
RE
W
YE
LLO
W
CLO
SED
END
CONN
ECTO
R
BLU
E
BLACK
BLACK
RED
RED
TT
(C &
W)
Figure 13. Wiring Diagram
Mo
del
PG
B-D
I Po
wer
Gas
Bu
rner
“D
irec
t Ig
nit
ion
”
Mo
del
AF
-15
Oil
Bu
rner
7037
900
Mo
del
CM
F S
erie
s F
urn
ace
Typ
ical
wir
ing
dia
gra
mfo
r 24
Vac
th
erm
ost
atan
d R
7184
fo
r an
oil-
fire
d fo
rced
air
syst
emL
IMIT
BU
RN
ER
MO
TOR
IGN
ITO
RIG
NIT
OR
L2
L1
L2
T TR71
84
BU
RN
ER
MO
TOR
CA
DC
EL
L
JUN
CT
ION
BO
X
CA
DC
EL
L
OR
AN
GE
BL
UE
BL
AC
K
WH
ITE
L2L1
(HO
T)
FAN
RE
LA
YC
OO
LIN
GC
ON
TR
OL
T86
00
RC G Y R W
1
1
L1
(HO
T)
1P
OW
ER
SU
PP
LY. P
RO
VID
E D
ISC
ON
NE
CT
ME
AN
SA
ND
OV
ER
LO
AD
PR
OT
EC
TIO
N A
S R
EQ
UIR
ED
.
LE
GE
ND
:
S
CR
EW
TE
RM
INA
L
1/4
IN. Q
UIC
K C
ON
NE
CT
TE
RM
INA
L
-
15
DO NOT USE GASOLINE, CRANKCASE OIL,OR ANY OIL CONTAINING
GASOLINE.
! WARNING:Failure to keep supply oil clean by variousprocedures
described above may causefailure of certain components such as
thefuel pump gears, check valve, shaft seal,or burner nozzle which
may result in aburner fire.
ELECTRICAL WIRING
GeneralAll electrical wiring must be made in accordancewith
these instructions, all local codes, andANSI/NFPA 70 (National
Electric Code). Thisfurnace shall be installed so the
electricalcomponents are protected from water.
If any of the original wiring supplied with theappliance must be
replaced, it must be replacedwith wiring of the same material,
gauge, andtemperature rating.
Line Voltage RequirementsBefore proceeding with the electrical
connec-tions, make certain that the voltage, frequency,and phase of
the supply source are the sameas those specified on the unit rating
plate. This
unit must be electrically grounded in accor-dance with local
codes, or in the absence oflocal codes, with ANSI/NFPA 70 (National
Elec-trical Code).
Use 14-2 Type NM cable with ground or conduitwith single wires.
Secure the cable at theappliance using a code approved
connector.
Line Voltage ConnectionsBefore connecting the power supply
wiring,become familiar with the wiring of this applianceby
reviewing the wiring diagram, shown inFigure 13 , or the wiring
label located on theinside of the appliance.
1. Open the appliance door to gain access tothe control box.
2. Remove the control box cover.
3. Connect the black wire of the power supplycable to the black
wire of the appliance.
4. Connect the white wire of the power supplycable to the white
wire of the appliance.
5. Connect the ground wire of the powersupply cable to the green
screw located inthe control box of the appliance.
6. Check all electrical connections, whichshould be secure and
tight.
CAUTIONDo Not Rotate — Hold
Dial When Setting Pointers
Scaleplate
Limit Stop*Fan OFFIndicator
Fan ONIndicator
Limit Indicator(Factory-Set at 160 F)
50
100150
20
025
0
FAN LIMIT
OFF
ON OFF
Figure 14. Fan and Limit Settings
-
16
7. Replace the control box cover.
8. Install a disconnect switch (fused or un-fused) between the
appliance and theelectrical supply at a convenient locationnear the
appliance. This switch should beeasily accessible.
Room Thermostat RequirementsWhen selecting thermostat location,
consider-ation must be given to the following:
1. Locate the thermostat approximately fivefeet above the floor
in a location accessiblefor wiring and setting, preferably in a
livingor adjoining room.
2. Locate on an inside wall.
3. Do not locate where influenced by abnor-mal heat, such as
from sunlight, radio,T.V., or lamps.
4. Do not locate where influenced by abnor-mal cold, such as on
an outside wall, on awall separating an unheated room,near drafts
from stairwells or doors, orclose to windows.
5. Do not locate where air circulation is poor,such as behind
open doors, in corners oralcoves, or close to furniture.
The heat anticipator of the thermostat should beadjusted to .4
amps for power oil models, and.9 for power gas direct ignition
models.
Room Thermostat Connections
1. Run R and W from the thermostat to theburner compartment.
2. Connect R to one of the low voltageterminals on the
burner.
3. Connect W to the other low voltage terminalon the burner.
FAN AND LIMIT CONTROLS
Constant Blower OperationThe button protruding through the cover
of thefan and limit control provides either automaticoperation of
the blower through the thermostat
or constant blower operation. Pull the button outfor automatic
operation. Push the button in forconstant blower operation.
Fan and Limit Settings
! CAUTION:When adjusting the fan setting levers,hold the
scaleplate dial to keep it fromturning and straining the sensing
ele-ment.
The fan and limit switch has three levers: FANON, FAN OFF, and
LIMIT OFF. These leverscontrol the blower operation of the
appliance.
The FAN ON lever controls the temperature atwhich the blower
energizes. This lever can beadjusted through a range of 15oF above
the FANOFF setting to 30 oF below the LIMIT OFFsetting. The
recommended factory setting is110 oF.
The FAN OFF lever controls the temperatureat which the blower is
to stop to prevent thecirculation of cool air. The recommended
factorysetting is 90 oF.
The LIMIT OFF lever is a safety stop. This levershould not be
adjusted or tampered with for anyreason. The factory setting is 160
oF.
Figure 15. Direct Ignition Gas Valve
-
17
Auxiliary LimitThis furnace is equipped with an auxiliary
manualreset limit. This limit is designed to function("trip") in
the event of a blower motor failure. Ifthe limit trips, reset the
limit by firmly pressingthe red button in the center of the limit.
The limitis located on the left hand side of the blowerassembly. If
the limit will not reset, continues totrip, or the blower does not
function, notify yourNORDYNE Distributor or Service
PROimmediately.
MAINTENANCE
Air FiltersAir filters should be inspected and
cleanedmonthly.
Combustion Air and Venting SystemInspect the combustion air and
venting systemat the beginning and end of the heating systemfor
deterioration, blockage, or damage. Cleanthe system, if
necessary.
LIGHTING AND OPERATINGINSTRUCTIONS FOR CMF PG DIRECTIGNITION GAS
BURNERS
For Your Safety Read Before Lighting orOperating.
! WARNING:If you do not follow these instructionsexactly, a fire
or explosion may resultcausing property damage, personal in-jury or
loss of life.
A. This appliance does not have a pilot. It isequipped with an
ignition device whichautomatically lights the burner. Do not tryto
light the burner by hand.
B. BEFORE LIGHTING OR OPERATINGsmell all around the appliance
area for gas.Be sure to smell next to the floor becausesome gas is
heavier than air and will settleon the floor.
WHAT TO DO IF YOU SMELL GAS:• Do not try to light any
appliance.• Do not touch any electric switch, do not
use the phone.• Leave the building immediately, then
call your gas supplier.• If you cannot reach the gas supplier,
call
the fire department.
C. Use only your hand to push in and movethe gas control lever.
Never use tools. Ifthe lever will not push in by hand, don't tryto
repair it, call a qualified service techni-cian. Force or attempted
repair may resultin a fire or explosion.
D. Do not use this appliance if any part hasbeen under water.
Immediately call aqualified service technician to inspect
theappliance and to replace any part of thecontrol system and any
gas control whichhas been under water.
E. Should overheating occur, or the gas sup-ply fail to shut
off, turn off the manual gasvalve to the appliance.
Operating Instructions for PG DirectIgnition Burner
1. STOP! Read the safety information above.
2. Set the thermostat to OFF or to its lowestsetting.
3. Turn off all electric power to the appliance.
4. This appliance is equipped with an ignitiondevice which
automatically lights theburner. DO NOT try to light the burner
byhand.
5. Turn the latch and open the furnace door.
6. Push in the gas control lever and move toOFF. DO NOT
FORCE.
7. Wait ten (10) minutes to clear out any gas.If you then smell
gas, STOP! FollowSection B in the safety information above.If you
don’t smell gas, go to the next step.
-
18
8. Move the gas control lever to ON.
9. Close the furnace door and turn the latch.
10. Turn on all electric power to the appliance.
11. Turn the thermostat to ON and set to thedesired setting.
12. If the appliance will not operate after onere-try, follow
the instructions in the “ToTurn Off Gas To Appliance” Section
belowand call your service technician or gassupplier.
To Turn Off Gas to the Appliance
1. Set the thermostat to OFF or to its lowestsetting.
2. Turn off all electric power to the applianceif service is to
be performed.
3. Turn the latch and open the furnace door.
4. Push in the gas control lever and move toOFF. DO NOT
FORCE.
5. Close the furnace door and turn the latch.
Checking the Input of the FurnaceRefer to the rating plate on
the furnace todetermine the firing rate for your application.Using
Table 4, determine the appropriate orificesize for the firing rate
and gas being used in yourapplication. Check the burner orifice to
ensurethat it is the correct size.
The input of this furnace can be checked usingthe following
procedure, which is based onusing a one cubic foot gas meter:
Firing Rate Natural Gas Natural Gas LP Gas LP Gas TimeBurner
Input Orifice Time Per Rev.* Orifice Per Rev.**
Designation (BTUH) Number (sec) Number (sec)Gas Gun-65-DI-S
65,000 24 55 43 138Gas Gun-75-DI-S 75,000 20 48 40 120Gas
Gun-90-DI-S 90,000 16 40 36 100
* There times are based on natural gas at an average of 1,000
BTU per cubic foot, a burnermanifold pressure of 3.5 in WC, and a
meter dial size of 1 cubic foot.
** There times are based on LP gas at an average of 2,500 BTU
per cubic foot, a burnermanifold pressure of 3.5 in WC, and a meter
dial size of 1 cubic foot.
Table 4. Natural and LP Gas Orifices
1. Shut off all other gas fired appliances,except for any
pilots.
2. Start the furnace in heating mode and allowit to run for at
least three minutes.
3. Measure the amount of time (in seconds)required for the gas
meter to complete onerevolution. Note that one revolution will
beequal to one cubic foot of gas.
4. Compare the time measured with theappropriate time listed in
Table 4. If the timevaries by more that 5% from the timesshown in
the table, then measure the inletand gas valve manifold pressures,
usingthe procedure outlined in the “Measuringthe Inlet Supply and
Manifold Pressures”section.
5. If both the inlet gas pressure and themanifold pressure are
properly set, thencheck the burner orifice to ensure that it
isproperly sized. Further gas problemsshould be referred to the
local gas supplier.
Measuring the Inlet Gas and ManifoldPressuresFor natural gas
installations, the inlet gas linepressure at the gas valve inlet
must be between5 in WC and 7 in WC. For LP gas installations,the
incoming gas line pressure at the gas valveinlet must be between 11
in WC and 13 in WC.This pressure can be checked at the portlocated
on the gas inlet end of the gas valveusing a pressure gauge or
U-tube manometer,which must be installed according to
themanufacturer’s supplied instructions.
For natural gas installations, the manifoldpressure must be set
at 3.5 in WC. For LP gasinstallations, the manifold pressure must
be set
-
19
at 10.0 in WC. This pressure can be checkedat the port located
on the gas outlet end of thegas valve using a pressure gauge or
U-tubemanometer, which must be installed accordingto the
manufacturer’s supplied instructions. Ifthe manifold pressure is
not equal to the valvesabove, then it must be adjusted. To adjust
themanifold pressure, remove the regulatorconverter from the gas
valve, as shown inFigure 16. Then turn the adjusting screwclockwise
to increase the pressure orcounterclockwise to reduce the pressure.
Oncethe manifold pressure is correctly set, replacethe regulator
converter in the same manner asit was removed earlier.
To install a pressure gauge or U-tube manometerin the gas
valve:
1. Determine which pressure, the inlet gas ormanifold pressure,
you want to measure.
2. With a 3/16” Allen wrench, remove theappropriate tap plug
located on the gasvalve. When measuring the inlet gaspressure,
remove the tap plug on the inletside of the gas valve. When
measuring themanifold pressure, remove the tap plug onthe outlet
side of the gas valve.
3. Install a fitting, which has a 1/8” NPT pipethread that is
compatible with the pressuregauge or U-tube manometer.
4. Install the pressure gauge or U-tube ma-nometer according to
the manufacturer’ssupplied instructions.
5. After measuring the pressure, be sure toremove the pressure
gauge or U-tubemanometer from the gas valve and replacethe tap
plug. Ensure that the tap plug is tightand not cross-threaded.
Gas Burner ControlsThe gas valve lever can be set to ON or
OFF,as shown in Figure 16. When in the ON position,gas flow through
the gas valve is allowed whenthe valve is energized electrically.
When in theOFF position, gas flow is completely shut off.
Combustion Blower Centrifugal Switch
Figure 16. Natural Gas Configuration
The electric motor for the blower which suppliescombustion air
to the burner is equipped with acentrifugal switch wired in series
with the burnercontrols. This switch is normally open until
thespeed of the blower motor closes it therebypowering the burner
controls. The burnercontrols will not function until the blower
motoris operating at full speed.
Natural Gas to LP ConversionThis gas fired heating appliance was
shippedfrom the factory for use with natural gas. How-ever, the
appliance can be converted to be usedwith LP gas. Use the following
procedure forgas conversion of the burner.
1. Follow instructions “To Turn Off Gas ToAppliance” earlier in
these instructions.
2. Shut off gas supply at meter.
3. Disconnect gas burner electric cord, gaspiping to burner, and
thermostat leads.
4. Remove three (3) hexagon nuts holdingburner in place.
5. Disconnect inlet pipe union at burner.
Table 5. Air Shutter Settingfor Different Fuels
Input Natural LP Gas Oil(BTU/H) Gas Setting Setting
Setting65,000 3.0 3.0 3.075,000 3.5 3.5 4.090,000 4.0 4.0 3.5
RegulatorConverter
-
20
6. Disconnect the two wires leading to gascontrol valve.
7. Remove three (3) bolts from U-shapedmanifold plate and
orifice assembly.
8. Remove the main orifice and replace it withthe appropriate LP
fuel orifice. Refer to therating plate on the furnace to determine
thefiring rate for your application. If the firingrate of your
furnace has been converted,ensure that the appropriate LP orifice
forthe new firing rate is installed. Then, useTable 4 to determine
the proper LP orificefor your firing rate.
9. Remove the regulator converter and itsblack cover located on
top of the gas valveand invert. (See Figure 16 — For LP, thered
ring will be located at the bottom and the“LP” stamping on the
converter will appearright side up.)
10. Screw converter back into the regulator,hand tight plus1/8
turn, and replace the black cover ontothe converter top to protect
the threads.
11. Reinstall the burner assembly into thefurnace.
12. Reconnect the gas piping and electricalwires to the gas
valve.
Figure 17. Oil Pumps
AIR BLEED VALVE
NOZZLEPORT
NOZZLEPORT WEBSTER
SUNTEC
INLET PORT
INLET PORT
INLET PORT
AIR BLEEDVALVE
13. Open the manual shut-off valve and followthe “Operating
Instructions” as outlinedpreviously in this manual to put the
furnaceinto operation.
Adjusting the BurnerThe air shutter is factory pre-set for
installationin a given furnace, as shown in Table 5. Youshould not
need to adjust the air shutter settingof the gas gun burner except
when convertingthe firing rate of the furnace. For your
installation,check to ensure that the air shutter setting
iscorrect. It is very important that the combustionair supply be
ample without decreasing theefficiency of the burner. An inadequate
amountof air can cause carbon monoxide (CO)production. The carbon
dioxide (CO2) contentof the flue products should be in the range
of8.0% to 9.0% for natural gas and 9.0% to 10.0%for LP gas. The
burner should run quietly.For high altitude operation (altitudes
greaterthan 2,000 feet), the input should be de-rated by4% for each
1,000 feet above sea level byreducing the orifice size or
decreasing themanifold pressure. When decreasing themanifold
pressure, the pressure must not beset below 3.2 in WC. If the
pressure needs tobe set below 3.2 in WC to achieve the proper
de-rate, then change the orifice size and raise themanifold
pressure back to 3.5 in WC.
Figure 18. PO Oil Burner Electrode Settings
5/32" GapElectrode
5/16" ABOVE CLNozzle
1/16"
1-1/8" - 65,000 and 75,000 BTU/HR Inputs, FO Head
1-13/32" - 90,000 BTU/HR Input, F3H Head
-
21
LIGHTING AND OPERATING INSTRUC-TIONS FOR CMF PO OIL BURNERS
Oil burners in this series are factory equippedwith a primary
control capable of eitherintermittent or interrupted ignition.
Start-Up Procedure
1. Open all manual shut-off valves in the oilsupply line from
the tank to the burner.
2. Turn ON the electrical supply to thefurnace.
3. Set the room thermostat to the desiredtemperature.
Air-Bleed Procedure - Single PipeInstallation
1. Open the door to the furnace.
2. Attach 1/4" I.D. plastic tube over the endof the airbleed
valve on the oil pump asshown in Figure 17. Place the other endof
the tube in a large container.
3. Pull the door interlock switch out to startthe burner.
4. Turn the airbleed valve open not more than1/2 turn to get a
fast flow of oil into thecontainer.
5. To assure continuous operation, use awire to jump terminals
T-T (or F-F) on theprimary control while burner is running.
Iffurnace is equipped with the HoneywellR7184 primary control,
priming oil pumpprocedure is as follows:
a. While the ignition is on, press thereset button for 1/2
second or lessand release the reset button. Thelockout time will be
extended to 4minutes.
b. If prime is not established within the4 minutes, the control
will lock out.Press the reset button to reset thecontrol and to
step “a”.
c. Repeat steps “a” and “b”, if needed,until the pump is fully
primed.
6. When oil flow is clear and free of airbubbles, close
air-bleed valve and tighten.
(Time to bleed air out will vary dependingon length of oil line,
number of bends, etc.)
7. Remove the jumper wire on the primarycontrol.
Oil Burner Shutdown ProcedureSet the room thermostat to “OFF” or
itslowest setting.
Flame Adjustment
1. Turn the thermostat to a setting belowroom temperature to
start the furnace.
2. Allow the furnace to operate for about ten(10) minutes.
3. Adjust the air shutter setting until 11% CO2with a number
zero smoke or less isachieved. Furthermore, the draft over thefire
must be at least negative 0.02 in WC.The factory set air shutter
settings areshown in Table 5.
Electrode SettingThe electrode setting is carefully set at
thefactory. However, during transit, the setting ofthe electrodes
may become improper. Beforeattempting to start the oil burner,
check thepositioning of the electrodes to ensure that theyare
properly positioned, as shown in Figure 18.Improperly adjusted
electrodes can result inpoor ignition. Do not permit the electrodes
to becloser than ¼” to any grounded surface.
SWITCHING FROM INTERRUPTED TOINTERMITTENT IGNITION
CONTROLHoneywell oil primary control can be switchedbetween
interrupted and intermittent ignitioncontrol. To switch from
interrupted duty (Factoryset) to intermittent duty, remove the
ignitor wirefrom the blue control wire. Attach the burnermotor and
igniter wire to the orange control wire.Cap and reseal the orange
wire. Cap and isolatethe blue control wire. Refer to Figure 13.
FIRING RATE CONVERSION
The rated firing rates of the CMF80 convertiblefurnaces (PO
& PG) can be adjusted from thefactory setting of 75,000 BTU/hr.
The firing ratecan be changed to either 65,000 BTU/hr or to90,000
BTU/hr using the appropriate certifiedNORDYNE conversion kit
installed by aNORDYNE distributor or Service PRO. See
theReplacement Parts Listing for the appropriatekit number to
order.
-
22
FURNACE OPERATING SEQUENCE
A. Gas Furnace
1. On a call for heat, the thermostat contactsclose, which
applies 24 volts to the “W”terminal.
2. The combustion blower motor energizes.After the motor begins
to rotate, thecentrifugal switch, which is located in themotor end
cap, closes.
3. A thirty (30) second pre-purge periodbegins, during which the
ignition control willinitiate an internal safety start check.
4. Upon passing the safety check, the controlbegins a fifteen
(15) second ignitor warm-up period. During this period, the ignitor
willwarm to the ignition temperature.
5. The control then applies 24 volts to the gasvalve.
6. The ignitor ignites the gas, and thepresence of flame will be
detected usingflame rectification principles.
7. The flame must be detected within a timedtrial ignition
period. If the flame is detected,then the ignitor is de-energized.
The gasvalve will remain open until the call for heatfrom the
thermostat is completed.Conversely, if the flame is not
detected,then the control will close the gas valve atthe end of the
timed trial ignition period. Thecontrol will then attempt ignition
two (2)more times before locking out.
8. The circulating air blower will energizethereafter, when the
temperature fanswitch closes.
9. When the thermostat is satisfied, the “W”terminal is
de-energized.
10. The gas valve circuit will be de-energized,and the gas valve
will close.
11. The circulating air blower will de-energize,when the
temperature fan switch opens.
The control will close the gas valve, if thepresence of flame is
not or no longer detected.The control will attempt to re-ignite the
gas twicebefore locking out. Once in lock-out, the control
can be reset by interrupting the 24 volt power.This can be
easily accomplished by setting thethermostat below room temperature
for at leastforty five (45) seconds, and then returning it tothe
desired setting.
If adjusting the thermostat does not reset theignition control,
turn off the power to the appliancefor forty five (45) seconds, and
then turn it backon.
NOTE: If the gas control has been replaced orserviced, lighting
may not be satisfactory untilair has been purged from the gas line
or the gasinput and combustion air have been adjusted.
B. Oil Furnace - Honeywell R7184 Control
1. When a call for heat is initiated, there is a2-6 second delay
while the controlperforms a safe start check.
2. The ignition and motor are turned on anda flame should be
established within the15-second lockout time.
3. If flame is not sensed within the 15-secondlockout time, the
control shuts down onsafety lockout and must be manually reset.If
control locks out three times in a row, thecontrol enters
restricted lockout. To reset,hold down the reset button for 30
secondsuntil the LED flashes twice.
4. Once flame is established, the ignitionremains on 10 seconds
to ensure flamestability. It then turns off.
(interruptedignition)
5. The circulating air blower will energizethereafter, the
temperature fan switchcloses.
6. The furnace runs until the call for heat issatisfied. Burner
is shut down.
7. The circulating air blower will de-energize,when the
temperature fan switch opens.
ADJUSTING HEAT DISTRIBUTION
1. Set the room thermostat for the desiredroom temperature.
2. Balance the heat distribution by adjustingthe register
openings.
-
23
SERVICE GUIDE FOR FURNACES WITHPGB POWER BURNER WITH
DIRECTIGNITION
! CAUTION:Verify proper operation after servicing.
! IMPORTANT:1. Always disconnect power before ser-
vicing.2. Only persons trained and experienced
in direct ignition systems should ser-vice this equipment.
3. If a condition exists that causes theignition control to go
into safetylockout, meter readings must betaken quickly after
restart - within trialfor ignition period.
4. Always de-energize the system for atleast 45 seconds before
recy-cling for further tests.
5. The ignition control cannot be repaired.If the
troubleshooting procedureindicates a malfunction in the con-trol,
it must be replaced.
! CAUTION:Label all wires prior to disconnectionwhen servicing
controls. Wiring Errorscan cause improper and dangerous
op-eration.
A. Burner motor does not run - thermostatcalls for heat.
1. Defective thermostat circuit - bridgeTT connections on burner
junctionbox, if burner motor runs, check:
a. Thermostat connectionsb. Thermostat
2. No voltage to burner - plug test lampinto burner plug
receptacle, if it doesnot light, check for:
a. Blown fuse, electric supply offb. Door switch not making
contactc. Limit switch in open mode
d. Check for clean air filter and properairflow
e. Loose wire connectionsf. Check for tripped manual reset
aux-
iliary limit.
3. 120 volts is available to burner - Testlamp does not light.
Remove junctionbox cover on burner, check for:
a. Loose wiresb. Defective transformerc. Defective motor
B. Burner motor does not run, no main flame.
1. Defective centrifugal switch
a. Check the operation of centrifugalswitch by removing end bell
of theburner motor.
2. Check for gas supply - gas line valveon, control lever
on.
3. Check for burner safety lockout. (Re-start burner)
4. Check for 24 volts to ignition control
a. No voltage at purge timer - checkthe centrifugal switch in
the com-bustion motor.
b. No voltage to ignition control - checkpurge timer (allow one
minute forpurge timer to activate).
c. Check for 120 volts to ignition con-trol. (-Voltmeter at L1
and L2).
C. Ignition control is powered (120v and 24v).Ignitor does not
heat up.
1. Remove AMP plug from burner tubereceptacle and check for 120
volts atthe plug during ignition sequence
2. Replace ignition control if 120 volts isnot supplied to AMP
plug within 3 min-utes of ignition cycle start.
D. 120 volts is available at AMP plug. Ignitordoes not heat
up.
1. Disconnect burner plug from furnacereceptacle.
2. Disconnect AMP plug from burner tubereceptacle and check
ignitor circuitthrough receptacle with an ohmmeter.
-
24
a. Normal ohm reading should be be-tween 40 to 75 ohms.
b. An infinite or zero ohm reading indi-cates a defective
ignitor and it mustbe replaced.
3. Check for continuity from ignitor re-ceptacle to burner
ground.
4. Check for hairline cracks in ignitor’sinsulating ceramic.
! WARNING:When replacing the ignition control, re-placement
control MUST have the safetylockout time. FAILURE TO FOLLOWTHIS
WARNING MAY RESULT IN AN EX-PLOSION.
E. Main flame ignites but burner locks out.
1. Ignition control is not properlygrounded.
2. Defective ignition control.
3. Improper gas pressure or burner airadjustment is not allowing
flame tocontact ignitor tip for flame provingrectification.
F. 24 volts supplied to gas valve during igni-tion but no main
gas flow.
1. Gas valve may be defective. Replaceif necessary.
2. Gas piping may be plugged. Check foradequate gas supply to
gas valve atunion.
G. Burner operates, insufficient heat
1. Check the thermostat for proper set-ting and location. The
thermostatshould not be located where it will beaffected by another
heat source.(Lamps, ovens, sunlight, etc.)
2. Check for clean air filters and properair flow.
3. Check burner for proper gas firingrate.
4. Be sure unit is not undersized for itsthermal load.
5. Check thermostat anticipator. (0.9amps)
H. Burner does not shut off. (Note: Burnerwill stop when the
door switch is open. Withthe door open, secure the door switch
inthe closed position by depressing theswitch. The means for
securing the doorswitch must be removed once this testinghas been
completed.
1. Disconnect the thermostat wires fromTT connections on the
burner junctionbox. If the burner shuts off, check for:
a. Short circuit in the thermostat wires.
b. Defective thermostat.
I. Burner flame without motor running — gasvalve is stuck in
open position — Replacethe control, burner and heat exchangermay
need cleaning.
J. Noisy fire — Readjust combustion air toreduce volume of air
being drawn into theburner. (Caution — See “Adjusting theBurner” or
“Flame Adjustment” sections)
K. High Gas Bills
1. Check the combustion air adjustment.
2. Be sure the proper size orifice is beingused.
3. Be sure the return air filter is clean.
4. Be sure the home is insulated, win-dows and doors fit
tightly, and thereare no air leaks in the heating ducts.
5. Check room thermostat to be sure thesetting is not higher
than necessary.Low humidity requires higher tempera-tures for
comfort. Perhaps humidityshould be increased.
L. Circulation blower will not operate eventhough the burner
operates.
1. Turn on the manual blower switch, ifthe blower operates,
check the fanswitch.
2. Check the wiring to the motor.
3. Check for a burned out motor.
-
25
Control Module Status IndicatorA. Gas Furnace
1. One flash - the control is in lock-outbecause the inducer
centrifugal switchis or was stuck closed.
2. Two flashes - the control is in lockoutbecause the signal was
not receivedby the control that the inducercentrifugal switch had
closed withinthe time.
3. Three flashes - the control is in lockoutbecause a failed
ignition attempt, a gasvalve error, or a false flame sensedduring
the warm up period. A falseflame condition exists when the
flamesensor senses a flame without a flamepresent. If a false flame
has beensensed, the control will only return tonormal operation
after the false flamecondition is no longer present.
4. Four flashes - the control is in lockoutdue to a failure
within the control board.
B. Oil FurnaceThe indicator light on the oil primary
controlprovides lockout,recycle, and cad cell indications as
follows:
1. Flashing ½ second on, ½ second off -system is locked out or
in restrictedmode.
2. Flashing 2 seconds on, 2 seconds off- control is in recycle
mode.
3. Indicator light is on - cad cell is sensingflame.
4. Indicator light is off - cad cell is notsensing flame.
TROUBLESHOOTING- Honeywell R7184Primary Control
The following service procedures will help youbecome familiar
with the R7184 oil primarycontrol. For further service information,
pleaserefer to Honeywell R7184 Installation Instruc-tions, 69-1233
and Beckett Technician's QuickReference Guide, RWB 61351.
A. Burner does not start with a call for heat.
1. Check the electrical supply to thefurnace.
2. Be sure the furnace door switch is inthe on position.
3. Check for line voltage at the oil primarycontrol. Thevoltage
should be 115 VAC.
4. Check indicator light with burner off, nocall for heat
(noflame).
a. If indicator light is on, the cad cellis seeing stray light
or the cad cellor controller is defective.
b. If Indicator light is off, go to step 5.
c. If flashing, reset as B 1.
5. Jumper T to T terminals on primarycontrol.
a. If burner starts, check thermostator limit
wiringconnections.
b. If burner does not start, turn offpower. Check allwiring
connections.
c. If burner does not start, replaceR7184 control.
B. Burner starts, then locks out on safetywith indicator light
flashing at ½second on, ½ second off.
1. Reset primary control.
To reset the control from lockout, thebutton needs only to be
pressed andreleased. If it is in restricted mode, thebutton should
be held in for 30seconds (until the light flashes twice,or until
the light stops flashing onearlier models).
Note: Restricted Mode: If the controllocks out three times in a
row withouta complete heat cycle betweenattempts, the lockout
becomesrestricted mode.
-
26
Table 6. Cad Cell Resistance when sensing flame
Led Flashes Cad Cell Resistance in Ohms
0 - 400
400 - 800
800 - 1,600
>1600
1
2
3
4
a. If indicator light stops flashing andignition remains off,
primary con-trol could be defective. If linevoltage is present at
the ignitorterminals, but there is no ignition,the ignitor is
probably defective andneeds to be replaced.
b. If indicator light stops flashing, burnerturns on, but
control locks out again,check cad cell. If cad cell is Okay,replace
primary control.
c. If Indicator light continues to flash at½ second on. ½ second
off, verifythat control is not in restricted mode,if restricted
mode, reset it. If not inrestricted mode, replace R7184.
d. If indicator light stays off while theflame is on, check cad
cell sightingfor view of flame.
e. If burner locks out, check cad cellresistance.
f. If burner keeps running, system isOkay.
g. If indicator light is off, check cadcell assembly after
disconnectingline voltage power.
C. Burner will not start, and indicatorlight is flashing at 2
second on, 2second off.
Hold the reset button down for 1-2seconds. If indicator light
continues toflash, wait for 60-70 seconds. If it stillcontinues to
flash, replace the primarycontrol.
D. To Check Cad Cell Resistance.
Press and release the button during therun mode. The light will
flash to indicate thecad cell resistance. For proper
burneroperation, it is important that the cad cellresistance
reading is not over 1600 Ohms.For cad cell resistance, see Table
6.
-
¢708062¬¤708062
O’Fallon, MO
708062B (Replaces 708062A)
Specifications and illustrations subject to changewithout notice
and without incurring obligations.
Printed in U.S.A. (8/03)
INSTALLER: Please leavethese installation instructionswith the
homeowner.
EFFICIENCYRATINGCERTIFIED
ama