40QA024-060 Ceiling-Suspended Fan Coil Units€¦ ·  · 2007-04-25Ceiling-Suspended Fan Coil Units Installation, Start-Up and Service Instructions CONTENTS ... Select Location .....

40QA024-060Ceiling-Suspended Fan Coil Units

Installation, Start-Up and Service InstructionsCONTENTS

PageSAFETY CONSIDERATIONS ......................... 1INSTALLATION ................................... 1-17Step 1-- Complete Pre-lnstallation

Checks ............................................ 3• UNPACK UNIT• INSPECT SHIPMENT• BEFORE INSTALLATIONStep 2 -- Select Location ............................ 4Step 3 -- Mount Unit ................................. 6

WOODEN STRUCTURENEWLY BUILT CONCRETE SLABMETAL STRUCTUREPREVIOUSLY BUILT CONCRETE SLABTO MOUNT UNITTO INSTALL THERMOSTAT

Step 4 -- Connect Refrigerant Piping ................ 7Step 5- Connect Condensate Drain Line ........... 8Step 6 -- Make Electrical Connections ............. 10Step 7 -- Install Thermostat ........................ 12Step 8 -- Make Connections Between

Indoor and Outdoor Units ........................ 15• CHECK ACCURATOR METERING DEVICE• COOLING ONLY SYSTEMS• HEAT PUMP SYSTEMSSTART-UP ....................................... 18,19After Extended Shutdown .......................... 18Seasonal Changeovers ............................. 18Adjusting Airflow ................................... 18Operating Mode Memory ........................... 18Automatic Operation (Auto.) Mode .................. 18Operating Sequence ................................ 18

FAN OPERATIONCOOLING MODE OPERATIONHEAT PUMP OPERATIONDEFROST (Heat Pump Only)SYSTEM SAFETIESSPECIAL OPERATION, HEATING

CLEANING AND MAINTENANCE ................ 19,20Lubrication ......................................... 19Air Filters ........................................... 19• REMOVE AIR FILTERS• CLEAN OR REPLACE FILTERSClean Indoor Unit Bottom Panel .................... 20Clean Indoor Coil ................................... 20Clean Outdoor Coil (Outdoor Unit) .................. 20Clean Condensate Drains .......................... 20• CLEAN OR REPLACE DRAIN PANSERVICE ........................................... 20Before Calling for Service .......................... 20• IF SYSTEM FAILS TO OPERATEFRESH AIR INSTALLATION OPTION ................ 20Ventilation-Air Accessory .......................... 20TROUBLESHOOTING ............................... 20START-UP CHECKLIST ...................... C£1, C£-2

SAFETY CONSIDERATIONS

Installing and selaqcing air-conditioning equipment can behazardous due to system pressure and electrical components.Only trained and qualified service personnel should install orservice air-conditioning equipment.

Untrained personnel can perform basic maintenance, suchas cleaning and replacing filters. All other operations should beperformed by trained sel_qce personnel. When working on air-conditioning equipment, obsela_e precautions in literature andon tags and labels attached to unit.

Folbw all safety codes. Wear sat_ty glasses and workgloves. Use quenching cloth for brazing operations. Have fireextinguisher available. Read these instructions thorozLqlll3,Consult local building codes and National Electrical Code(NEC) for special installation requirements.

Before installing or servicing system, always turn offmain power to system. There may be more than one dis-connect switch. Turn off accessory heater power if appli-cable. Electrical shock can cause personal injury.

INSTALLATION

Installation instructions for i_ancoil units (Fig. 1) are con-rained in this manual. Refer to this manual for proper installa-tion of the complete system. Note that the outdoor units areshipped with installation and service instructions for basic in-stallation of the outdoor section. Be sure to make the connec-tions in Cooling Only Systems and Heat Pump Systems sec-tions on page 15 of this literature so that the unit wilt operateproperly.

Refer to Table 1 for proper system matches.

Fig. 1 -- Ceiling-Suspended Fan Coil Unit

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No, 02-40QA0007-SI Printed in U,S,A, Form 40QA-7SI Pg 1 3-06 Replaces; 40QA-5SI

Cooling Only

Heat Pumps

Heating/Cooling

SYSTEM TYPE

Table 1 -- System Matches

INDOOR SECTION NUMBER40QAC

024*

024

036

036

048

060

40QAQ024*

024

036

036

048

060

40QAQ024*

024

036

036

048

060

*Units must be field reconfigured for 11/2 ton (18,000 Btuh) operation. See Before Installation sec-tion on page 3 for details.

NOTE: Numbers in ( ) indicate quantities when there is more than one fan coil unit in the system.

OUTDOOR SECTION NUMBER

38HDR-3,5,6

018

O24

O3O

036

O48

O6O

38QRR-3,5,6

018

O24

O3O

036

O48

O6O

38HDR-3,5,8

018

O24

O3O

036

O48

O6O

Ensure unit operation within the application guidelinessho,a_ in Table 2. When installing the outdoor unit, for coolingoperation when the outdoor-air temperature is below 55 F, thefollowing accessories are required:• low ambient kit• crankcase heater• winter start kit• isolation relay (38QRR heat pump units only)

This will provide cooling operation down to 40 F ambienttemperature. For operation down to 20 F ambient tempera-ture, a rid&installed wind baffle will also be required.

To complete installation of the system, the following itemsmust be field-supplied for connection of the indoor and outdoorunits:

• refrigerant piping• condensate drain piping• thermostat• wiring

For some applications, a flesh air intake, power vent tan,and/or coMensate pump kit may be required.

Table 2 -- Application Range

COOLING

Maximum Minimum

Indoor Outdoor Indoor Outdoor95 F DB 125 F DB 67 F DB 55 F DB*71 FWB 57FWB 40FDB

HEATING (Heat Pump Systems Only)Maximum Minimum

Indoor Outdoor Indoor Outdoor

80 F DB 75 F DB 55 F DB -20 F DB71 F WB 65 F WB

LEGEND

DB -- Dry BulbWB -- Wet Bulb

*This value is for single-zone systems and may be equipped with anaccessory low-ambient control or winter start kit that will allowoperation down to 20 E

Table 3A -- Physical Data, Under Ceiling Cooling Only Units

SYSTEM SIZE 018* 024 030 036 048 060

NOMINAL CAPACITY (tons) 11/2 2 3 3 4 5

NOMINAL SIZE (Btuh) 18,000 24,000 30,000 36,000 48,000 60,000

OPERATING WEIGHT (Ib) 108 108 117 117 149 179MOISTURE REMOVAL WEIGHT(Pints/Hr) 4.0 7.3 6.0 9.0 13.0 14.5FINISH GM Motorhome White with Black Trim

REFRIGERANT R-410AControl (Cooling) AccuRater Control

INDOOR FAN Direct Drive CentrifugalRpm...Cfm High 862...500 1050...600 1275...840 1275...840 1435...1200 1275...1600Rpm...Cfm Medium 690...400 690...400 972...740 972...740 1388... 1160 972... 1220Rpm...Cfm Low 552...320 552...320 830...640 830...640 1315... 1100 830... 1040High Speed Watts 92 92 282 282 425 564Motor Quantity 1 1 1 1 2 2Blowers -- No....Size (in.) 2...6x8 2...6x8 2...6x8 2...6x8 3...6x8 4...6x8

INDOOR COIL Copper Tube, Aluminum FinFace Area (sq It) 2.2 2.2 [ 2.6 2.6 3.0 4.0

No. of Rows 4 4 [ 4 4 4 4Fins/in. 14.9 14.9 14.9 14.9 14.9 14.9Circuits 4 4 4 4 8 8

FILTERS CleanableQuantity 4 I 4 I 5 I 6 I 8 I 6

AIRSWEEPHorizontal User select ON/OFFVertical Manual

CONTROLSControl Voltage 24 VAuto Restart YesFan Speed High/Medium/LowCondensate Pump Safety Yes (Accessory)Indoor Coil Freeze Protection Standard shutoff at 28 FFilter Change Indication 250 Hours of Indoor Fan Operation

REFRIGERANT LINESConnection Type Flare

Liquid Line OD (in.) 3/8Vapor Line OD (in.) 5/8 [ s/8 [ 3/4 [ 3/4 I 7/8 [ 7/81-

Max Line Length For maximum line lengths see condensing unit instructions.CONDENSATE DRAINCONNECTION Pipe Thread (MPT)

CONDENSATE DRAIN SIZE (in.) 3/4

*Field reconfigured to 18,000 Btuh (11/2 tons). See Before Installa-tion section on this page for details.

1-The valve connection size is 7/8 inch. The recommended line sizeis 11/8 inch.

Step 1 -- Complete Pre-lnstallation Checks

UNPACK UNIT Store fro1coil unit in the original packag-ing until it is moved to the final site for installation. When re-moving unit fiom carton, lift unit by its 4 corners; DO NOT liftunit by its plastic parts.

INSPECT SHIPMENT Upon receipt of shipment, checktan coil unit for dmnage. Forward claim papers directly to thetransportation company. Manufacturer is not responsible fordamage incurred in transit.

Check all items; if any item is missing, notify your dealer.To prevent loss or damage, leave all parts in oiiginal packagesuntil installation.

BEFORE INSTALLATION Perform the following stepsbefore installing indoor tan coil unit. Place the iMoor unit up-side down on the floor, then:

1. Remove side panels by sliding forward, then awayfrom sides of unit (Fig. 2). Reinstall prior to unit start-up.

2. Remove air filters from inlet giilles; then remove andretain screws securing inlet _illes to indoor unit. Rein-stall prior to unit start-up.

Table 3B -- Physical Data, Under Ceiling Heat Pump Units

Face Area (sq ft)No. of RowsFins/in.Circuits

FILTERSQuantity

HEATERS (kW)AIRSWEEP

HorizontalVertical

CONTROLSControl VoltageDefrost MethodDehumidificationAuto RestartFan Speed

UNIT SIZE 018* 024 030 036 048 060

NOMINAL CAPACITY (tons) 11/2 2 3 3 4 5

NOMINAL SIZE (Btuh) 18,000 24,000 30,000 36,000 48,000 60,000

OPERATING WEIGHT (Ib) 110 110 119 119 181 181MOISTURE REMOVAL WEIGHT(Pints/Hr) 4.0 7.3 6.0 9.0 13.0 14.5FINISH GM Motorhome White with Black Trim

REFRIGERANT R-410A

Control (Cooling) AccuRater Control I TXVINDOOR FAN Direct Drive Centrifugal

Rpm...Cfm High 900...480 1050...550 1275...840 1275...840 1435...1130 1275...1600Rpm...Cfm Medium 862...400 900...480 972...740 972...740 1388... 975 972... 1220Rpm...Cfm Low 770...320 862...400 830...640 830...640 1315... 820 830... 1040High Speed Watts 92 92 282 282 425 564Motor Quantity 1 1 1 1 2 2Blowers -- No....Size (in.) 2...6x8 2...6x8 2...6x8 2...6x8 3...6x8 4...6x8

INDOOR COIL Copper Tube, Aluminum Fin2.2 2.2 2.6 2.6 I 3.0 4.0

4 4 4 4 I 4 414.9 14.9 14.9 14.9 14.9 14.9

4 4 4 4 8 8

Gleanable

414 5 516 82.0 2.0 3.0 3.0 4.0 5.0

User select ON/OFFManual

Condensate Pump SafetyFilter Change IndicationFreeze Protection

REFRIGERANT LINESConnection Type

Liquid Line OD (in.)Vapor Line OD (in.)

Max Line LengthCONDENSATE DRAINCONNECTION

CONDENSATE DRAIN SIZE (in.)

24 VTimed

YesYes

High/Medium/LowYes (Accessory)

250 Hours of Indoor Fan OperationIndoor coil less than 28 F, resets at 50 R

Flare3/8

5/8 I 5/8 I 3/4 I 3/4 I 7/8 I 7/81-For maximum line lengths see condensing unit instructions.

Pipe Thread (MPT)

3/4

*Field reconfigured to 18,000 Btuh (11/2 tons). See Before Installa-tion section on page 3 for details.

1-The valve connection size is 7/8 inch. The recommended line sizeis 11/8inch.

3. Remove inlet grilles from indoor unit by sliding for-ward. Reinstall prior to unit start-up.

IMPORTANT: If necessary, reconfigure the 24,000 Btuh [tan coil unit to 18,000 Btuh. Unplug the tM motor at the Icontrol box hamess and plug into the 40QA018 markedconnector.

Step 2 -- Select Location -- Consult local buildingcodes and NEC tbr special installation requirements. See Fig. 3and 4 for unit dimensions and required clearances.

There are several ways the unit may be installed to difLhenttypes of ceiling construction. These instructions do not coverall installation methods. As a typical installation, these instruc-tions focus prhnarily on mounting the unit to metal in new

construction. Plan the installation carefully betbre you begin.Listed below are some mlidelines that should be followedwhen determining location for the unit.

1. Place unit adjacent to an outside wall if fresh air isrequired, ensuring that location allows for complete airdistribution.

2. Locate the thermostat in an area that is not subjected todrafts or direct sunlight through windows. Locate thethermostat on an internal wall whenever possible.

3. Allow sufficient clearance for airflow, wiring, refiiger-ant piping, and servicing unit (Fig. 3 and 4).

4. Make sure the unit is easily accessible to electricalpower.

_1 '-6147219/16"_ l

_0"-95/8 _

[245]

q _O'-S 3liB"[1327

LOOSEN BOLT5 AND SLIDE 0"-43/4"

MOUNTING BRACKET THIS__ CONDENiATE

1121]

DIRECTION--TOBE.DYE AO&%%%BY0"-313/16"

0'-2 I/8"_ _ [96]

IssI _ ___4 =_ SIDE VIEW

_ACCURATER

..... __ _ _ REFRIGERANT DEVICE

• _:, -, ,2,,_, tlv _]roz_S/,S-DISCHARGE AIR _z./ _ [ l l_m

o,-s ,s-\R(2G TSIDERIR,HGOONN._XX / 2 'S_I_[LIQUID SIDE) / / / _, PIPING KNOCKOUT

PIPING CONN _ / DRAIN CONN, REFRIGERANT &[VAPOR BIDE _X DRAIN CO[ _ WIRING,

CONDENSATEREMOVABLE AIR FILTER _ INLET AIR DRAINAGE

(OPTIONAL)

NOTES:1. Dimensions in [ ] are in millimeters.2. Direction of airflow.3. Standard unit clearances are as follows:

• O" on top and rear• 3" on left side• 12" on right side• 36" on bottom

(When facing unit discharge.)

0'-211/16"_

[68]

T

REAR VIEW [ 0'-77/16"L_

REFIGERANT PIPING CONN.(LIQUID SIDE) -_

3/8 MALE FLARE /CONDENSATE POMP ACCESSORY

(20" MAX. LIFT) 0'-35/8"_

[93]0"-41/8"_

[104]0"-4 ?/8"_

[1233O'-S 1/8 _

113t]

_O'-tO'_q_CONTROL BOX I G _FoHVOL O -,_,s,G"i4 i q/| J-. .-k 1,q_ l, ' _ // \ / I ' P

i,1"q_d', i t l ) { J /

__O00NR_ IV _ / LO48"OEO ONLYLOW VOLTAGE TO OUTDOOR Ui_IT AND THERMOSTAT

__)n_B/8"MALE FLARE (018024) APOR SIDE) _Z _,_. ^T*_, ^_=ee_=,IlL 32 " * POWER VENTILATION ACCESSORY__,_.O) S" DUCT RINGL_ DRAIN PIPING CONN. (3/4"MALE NFI')

0'-1 [l/1B"

[421

0"_5_1/8"

[1303

POWER VENTILATION ACCESSORYMINIMUM 0'-3" [761 CLEARANCE

REDUIRED IN BACK OF UNIT

0'-41/4" i

TOP V EW 0'-11"i

- I [27931

1'-11 1/8" I

[5881_1

--REVERSEBRACKETSFOROPTIONAL CONCEALED MOUNTING

_M_T_NG B_ HOLES

o?#)1s-___.

BEA

i<-_0"-10_0'-11/8" [254]

0"-1 1/4" [29] "-4"

ALTERNATE TOP POWER _ I [_021{-,-Ihl[ENTRANCE KNOCKOUT !I h I

q

[ ....

FRONT VIEW

O'_9

IC AIR SWEEP LOUVERS J

_0"-2 11/16"[59]

TOP ACCESS FOR WIRING,REFRIGERANT 8 ACCESSORYCONDENSATEDRAINAGE(OPTIONAL)

ACCESS TO CONDENSATE

PUMP THRU SIDE PANEL

UNITSIZE

024

036

048

060

WEIGHT(Ib)

Cooling Only Heat Pump108 110

117 119

149 151

179 181

A B E F G

ft-in, mm ft-in, mm ft-in, mm ft-in, mm ft-in, mm

4- 215/[6 1294 3110 1169 4- 15/8 1260 -- -- 1- 95/8 549

4-10[s/[e 1493 4- 57/8 1368 4- 91/2 1459 -- -- 2- 11/2 648

5-11G/[6 1817 5- 6B/8 1692 5-10[/4 1783 1- 97/B 555 3- 3[/[G 992

7- 8 2336 7- 3 2211 7- 65/8 2302 1-115/8 601 4-119/[G 1512

Fig. 3 -- Base Unit Dimensions

FRONT VIEW

. -_- _

N

Fig. 4 -- Fan Coil Unit Clearances

5. Run refrigerant piping as directly as possible and avoidany unnecessary turns or bends.

6. Condensate piping can be directed through the insidewall to an approved drain or straight outside.

NOTE: The piping hole tbr condensate line must slope at aminimum pitch of t/4 in. per foot to ensure proper drainage. Ifproper pitch cannot be achieved, install accessory condensatepmnp at this time.

Step 3 -- Mount Unit -- Refer to Fig. 4 for clearancesand dimensions. Use mounting template included inside box tolocate mounting bolt holes, piping holes, electrical connec-tions, and accessory outdoor-air intake, if used.

Select proper type of hardware fiom the guidelines below.See Fig. 5.

Solid structure in ceiling must be used due to the weight ofthe unit.

WOODEN STRUCTURE Install hmlging bolts on asquare wooden piece placed over beams.

NEWLY BUILT CONCRETE SLAB Install hanging boltswith inserts, elnbedded bolts, etc.

METAL STRUCTURE Install hanNng bolts utilizing anexisting angle or by installing a new support angle.

PREVIOUSLY BUILT CONCRETE SLAB Install hang-ing bolts with expansion anchor.TO MOUNT UNIT:

1. Remove mounting bracket and reinstall the 2 hex-headbolts (factory-supplied) into each side of indoor unit assho,a_ in Fig. 6. Allow approximately 3/s-in. spacebetween bolt head and unit.

REINFORCING

(SLIDE INSERT) BAR

_EDDEDBANGIN_i BRACE I=1BEAM (EDGE SHARP BOLTBOLT INSERT) (EMBEDDED BOLT

OF PIPING )

WOODEN STRUCTURE NEWLY BUILT CONCRETE SLAB

BOLT ANGLE BAR

METAL STRUCTURE PREVIOUSLYBUILT CONCRETE SLAB

Fig. 5 -- Fan Coil Unit Mounting Methods(Hardware is Field-Supplied)

2. Determine installation position, paying particularattention to piping lengths, wiring connections, clear-ances, etc. See Fig. 3 for connection locations, Fig. 4t\_r clearances, and Fig. 7 and 8 for bolt locations.

3. Open kalockout if right-side piping connections arerequired (Fig. 9), by removing the pre-slit portion inthe rear of the right side panel with a saw or cutterknife.

4. Mount hanging brackets on ceiling (Fig. 10) for eitherconcealed or exposed bolt hanging position.

5. Lift the unit into place, and fit the hex-head bolts onsides of indoor unit into mounting slots of mountingbrackets (Fig. 11). Ensure unit is mounted with a slighttilt to the right rear side for properly drainage.

6. Tighten indoor unit hex-head bolts securely.

INDOOR UNIT

_ _'_€._r _ BOLT

(4, FACTORY SUPPLIED)

Fig. 6 -- Installing Hex-Head Mounting Boltsin Fan Coil Unit

REVERSE BRACKET HOLEFOR OPTIONAL CONCEALEDMOUNTING 4-1/2" x 1_ SLOTS

T21-b,., kll

EXPOSED MOUNTINGHOLE FOR HANGING BOLT4- 1/2"x 1" SLOTS

2,3 5/8"111 11"

DIMENSIONS (in.)

UNIT SIZE A B C

024 5015/1G 46 495/8036 5813/1G 53718 571/2

048 719/16 66518 701/4060 92 87 905/8

Fig. 7 -- Fan Coil Unit Hanging Dimensions

k, 4 114"

R ,RI-f--B-MOUNT*

C-MOUNTt ----------=-

POSITION OFHANGINGBOLT

(3/8 IN, DIA.HOLE)

DIMENSIONS (in.)

UNIT SIZE B C

024 46 495/8036 537/8 671/2

048 665/8 70114060 87 90518

*Exposed mounting holes.1-Reverse bracket holes (concealed mounting).

Fig. 8 -- Mounting Included withFan Coil Unit

SIDE VIEW OF RIGHT-SIDE PANEL

I _ ....... "lr_,. --{ REMOVE THE

_Q_ I | 1_-_-" _J PRE-SLIT

I - "7 __ PORTION IN REAR

OF PANEL WITH1 { A SAW OR CUTTERL -- - -- , KNIFE

1 P ....... I

Fig. 9 -- Removing Rear Knockout in Side Panelif Right-Side Piping Connection is Used

TO INSTALL THERMOSTAT:

If there is at least 3/8in. of space between the back of indoorunit midwall:

1. Route thermostat wires (field-supplied) through slot inright side or rear panel of indoor unit (Fig. 3).

2. Route wires over refrigerant and drain piping as shownin Fig. 12.

I IMPORTANT: Do not route wires under the piping, or Iwires could impede air filter removal. IStep 4 1 Connect Refrigerant Piping i Fan coilunits may be connected to outdoor umts using field-suppliedrefi-igerant _ade piping. Refer to Tables 3A and 3B for the cor-rect size piping. The length of retiigerant pipe depends on theunit placement and building structure; run pipes as directly aspossible. For piping requirements over 50 ft of total run, ormore than 25 ft of lift, consult the Residential Long Line Appli-cation Guide.

DO NOT BURY MORE THAN 36 IN. OF REFRIGER-ANT PIPE IN THE GROUND. It"any section of pipe isburied, there must be a 6-in. vertical rise to the valve con-nections on the outdoor unit. Ifmore than the recomlnendedlength is buried, refiigerant may mira'ate to the cooler, bur-ied section during extended periods of unit shutdown, caus-ing retiigerant slugging and possible compressor damage atstart-up.

To connect piping:

1. Install insulation. It is extremely important that allrefrigerant lines and the metering device be insulatedon heat pumps and multi-splits. On cooling only units,the liquid line may be left uninsulated. Use any accept-able heat resistant closed-cell t%am insulation (mini-mum 3/8-in. wall thickaless). When insulating piping,cap ends and slide insulation over the piping. Insula-tion can also be cut and placed over piping.

2. Run liquid and gas refrigerant piping.

a. Run pipes as directly as possible, and avoid anyunnecessary turns and bends.

b. Suspend refrigerant pipes so that the insulation isnot damaged and vibrations are not transmitted tothe structure.

c. Leave slack in the reliigerant pipe between thestructure and the unit to absorb vibrations.

d. A piston is shipped in the factory-installed meter-ing device body (Fig. 13) with the indoor unit. UseTables 4A-4C to verify that you have the requiredpiston size for the system being installed.

IMPORTANT: The metering device is factory-installed and only needs to be replaced for long lineapplications or if the system combination requires it.See Tables 4A-4C. See Fig. 13.

For special applications such as long lines or raisedelevations, consult the Residential Long LineApplication Guide for specific system require-ments. The arrow on the metering device bodymust face away from the indoor coil.

f. RefertotheoutdoorunitInstallation,Start-UpandServiceInstructionsforadditionalint\mnation.

g. Installa factory-suppliedfilterdrierneartheout-door unit. On heat pump systems, a bi-flow filterdrier must be used.

3. Insulate and caulk wall openings to reduce air infiltra-tion and refrigerant pipe vibrations on structure.

4. Evacuate piping, if necessary. If either refrigerant pip-ing or the indoor coil is exposed to atmospheric condi-tions, it must be evacuated to 1000 microns toeliminate contamination and moisture in the system.

Step 5- Connect Condensate Drain Line --Observe all local sanitary codes when installing condensatedrains. Refer to Fig. 3 and 14 for drain pipe connection fiomindoor unit.

1. Use hard polyvinyt chloride (PVC) pipe material withnominal ID of 3/4 in. to connect at drain line. Use pipeinsulation 1/4-in. thick, such as Armaflex insulation, onexposed piping inside the conditioned space.

2. To ensure regular flow of condensate water, the drainpipe should be pitched toward an open drain or sumpat a downward slope of at least 1/4-in.per ft.

3. Attach plate with screws under piping hole.

4. Attach drain pipe with nylon wire tie passing throughhole (Fig. 15).

NOTE: Do not fasten nylon wire ties tight enough todeforln the insulation, as this affects its performance.

5. Insulate condensate drain line(s) that are located in orabove an occupied area with a condensate-proof mate-rial such as polyurethane or neoprene.

6. Install an external trap at the end of the condensateline.

NOTE: Should the installation require one, a conden-sate pmnp may be ordered as a field-installedaccessory.

Table 4A -- Piston and Charge Combinations -- Cooling Only Systems

COOLINGINDOOR UNIT SIZE

024

036

048

060

OUTDOOR UNIT38HDR

018

024

030

036

048

O6O

PISTONSIZE

57

57

65

7O

8O

9O

CHARGE (Ib)

7.0

7.75

10.1

8.9

12.2

12.5

Table 4B -- Piston and Charge Combinations -- Heat Pump Systems

HEAT PUMP OUTDOOR UNIT PISTON SIZE PISTON SIZE CHARGE (Ib)INDOOR UNIT SIZE 38QRR INDOOR OUTDOOR

018 49 40 7.5024

024 55 43 7.8

030 65 55 12036

038 70 63 13048 048 82 73 12.2

060 060 --* 80 12.8

*Size 060 indoor heat pump systems use a TXV Ihermostatic expansion valve), part no. EA36YD250.

Table 4C -- Piston and Charge Combinations -- Heat and Cool Systems

HEAT PUMPINDOOR UNIT SIZE

024

036

048

060

OUTDOOR UNIT38HDR

018

024

030

036

048

O6O

PISTONSIZE

57

57

65

7O

8O

CHARGE (Ib)

7.0

7.75

10.1

8.9

12.2

12.5

*Size 060 indoor heat pump systems use a TXV (thermostatic expansion valve), part no. EA36YD250.

(CEILING)

CONCEALED MOUNT EXPOSED MOUNT

LAG SCREW ,_S CEIUNG BOARD

__5/16" OR LESS

I I

I /)'_ SIDE PANEL(RIGHT)_ ,,,,-L_

(WALL)

MOUNTING SLOTS

HANGER BOLT _ _¢" CEILING BOARD

, ---1131r'--f-, t0"OR,ESSHANGER _'- --

i I

BODY _ /I

(CEIUNG)

(WALL)

Fig. 10- Mounting Hanging Brackets

. , j,v

MOUNTINGSLOT

HEX-HEADBOLT

Fig. 11 -- Hanging Fan Coil Unit

_ REFRIGERANT PIPING

*Factory-supplied,

Fig. 12 -- Routing Wires Over Piping

SERVICE

VALVE

TEFLON SEAL

NOTE: Teflon Seal must face toward the outdoor heat pump unit.

Fig. 13 -- AccuRater Metering Device at ServiceValve (Bypass Type Components),

Heat Pump Systems Only

Step 6 -- Make Electrical Connections -- Be surefield wiring complies with local building codes and NEC, andunit voltage is within limits shown in Table 5.

Contact local power company for correction of improperline voltage.

To avoid personal injury or damage to unit, do not makeelectrical connections until all power sources are shutdown, locked out, and tagged off. Failure to do so couldresult in personal injury or unit damage.

Operation of unit on improper line voltage constitutes abuseand could affect wananty. Refer to Table 5 for permissibleoperating limits. Do not install unit in system where voltagemay tluctuate above or below permissible lhnits.

NOTE: Use copper wire only between disconnect switch(es)and unit.

NOTE: Install branch circuit disconnect of adequate size tohandle unit starting cunent per NEC. Locate disconnect withinsight of, and readily accessible tiom, unit, per Section 440-14of NEC. Some codes allow indoor unit to share disconnect with

outdoor unit if disconnect can be locked; check local codebefore installing in this manner.

1. Route ground and power wires.

According to NEC and most local codes, the unit must havean uninterrupted, unbroken ground to minimize personalinjury if an electric thult should occm: The gouM mayconsist of electrical wire or metal conduit when installed inaccordance with existing electrical codes. Failure to followthis warning could result in an electric shock, fire, or death.

2. Route line power leads (see Fig. 16) from indoor dis-connect to the tan coil unit. Place wire through hole onthe control box (Fig. 17). Connect wire to high voltageterminal board (TB 1) and mound screw. When routingthe wire in the unit, use care to keep the wire awayfrom refiigerant and condensate piping and any sharpedges. The 208/230-v units are factory wired t\_r230-v to 24-v transformer operation. For 208-v to24-v operation, interchange blue (208-v) and red(230-v) wires. Cap any unused wires with wire nuts.

Table 5 -- Electrical Data*

SYSTEM UNITTYPE SIZE Motor 1 FLA

0241. 0.5

COOLING 036 1.3ONLY 048 1.1

060 1.3

0241" 0.5036 1.3

HEAT PUMP048 1.0

060 1.3

LEGEND

FAN

Motor 2 FLA

0.5

1.3

0.5

1.3

AWG -- American Wire GageFLA -- Full Load AmpsMCA -- Minimum Circuit Amps per NEC Section 430-24MOCP -- Maximum Overcurrent ProtectionNEC -- National Electrical Code

HEATER

kW FLA MCA

-- -- 0.53

-- -- 1.60

-- -- 2.00

-- -- 3.30

2.00 8.66 9.29

3.00 13.00 17.70

4.00 17.40 23.80

5.00 21.70 28.70

POWER

MOCP

15

15

15

15

15

2O

25

3O

FLA

0.50

1.30

1.60

2.60

11.29

14.30

19.00

24.30

MIN WIRE SIZE(AWG)

14

14

14

14

14

14

12

10

*All units are 208/230-3-60. Minimum operating voltage is 187, max-imum is 253. Units will operate satisfactorily within this voltagerange.

1-Electrical data is the same for both the 24,000 Btuh 024 unit andthe 024 unit that has been field-reconfigured for 18,000 Btuh. Referto Before Installation section on page 3 for reconfiguration details.

10

AIRFLOW

WEATHERPROOFFUSED DISCONNECT **

:. pERNEC

_"'_'/, ''"_2 WIRES 1_

__ 3WIRES3_(+) GROUND

HEAT PUMP METERING

DEVICEATOUTDOORUNITFILTERDRIER*(SEE FIG. 17)

SIGHT GLASS**

WITH ACCESSORY PUMP t(MAX 20 IN. LIFT)

2 WIRES

(+)GROUND _

FUSED DISCONNECT**i

CONTROL CONNECTIONS

(COOLING ONLY),(HEAT PUMP)

AIRFLOW

THERMOSTATt

COOLINGDEVICE

(INSTALLED INSIDEUNIT)*

CONTROL POWERPROVIDED INSIDE UNIT

CONDENSATEDRAIN LINE**

LEGEND

-- PhaseNEC -- National Electrical Code--------,-- Piping

Line Voltage-- 24V.... Thermistor

*Standard.1-Accessory item.

**Field supplied.I-I-Insulate for heat pump application.

NOTES:1. All piping must follow standard refrigerant piping techniques.2. All wiring must comply with the applicable local and national codes.3. Liquid line need not be insulated (cooling only units).4. Wiring and piping shown are general points-of-connection guides

only and are not intended for a specific installation.5. Insulate condensate line if run above a conditioned space.7. Metering device is provided.

Fig. 14- Component Location (Typical Ceiling-Suspended System)

]!

Step 7 -- Install Thermostat -- These systems use a3-speed thermostat. The thermostat monitors the system opera-tion and controls the operating mode. To change settings or re-fer to the thermostat Operating Instructions.

Mount thermostat to a wall in the occupied space using2 field-supplied screws. Locate the thermostat in an area that isnot subjected to drafts or direct sunlight through windows.Locate thermostat on ml interior wall whenever possible.Fimlre 18 shows available thermostats.

KNOCKOUT (REAR PIPING)

208/230 V _--

SINGLE-PHASE|CONNECTION/ITO INDOOR

UNIT |

DISCONNECT L

LEGEND

TB -- Terminal Block

TB1

:DEQUIPMENTGROUND

Fig. 16 -- Line Power Connections

WIRE TIE

HOLE

REAR EXIT

DRAIN PIPING

HOLE FOR RIGHT

f PIPING

I__ _ _ _ /'DRAIN PIPING

/USE 2 SCREWS REMOVEDFROM SHPPING BRACKET

RIGHT-HANDEXiT

Fig. 15- Routing Drain Piping

12

COMPONENT ARRANGEMENT

T_TA_OUTD_ ONIT

N_ASSIl

1 lllilil[ liitlfl

I T; t Ill

036,048,080 ONLY [_!_N

o PCB 'r_

i

FIELD PO_R HOLE FOR

D]_:ONNECT I_R NEC POWERWlRING

FRONT VIEW SIDE VIEW

HP ONLY

LEGEND

ASM -- Air Sweep Motor NEC -- National Electrical CodeASR -- Air Sweep Relay PL -- PlugEQUIP GND -- Equipment Ground TB -- Terminal BoardFL -- Fuse Link TRAN -- Transformer

FPT -- Freeze Protection Thermostat Q Terminal (Marked)HP -- Heat PumpHR -- Heater Relay O Terminal (Unmarked)HTR -- HeaterHTT -- Heater Temp. Thermostat • SpliceIFM -- Indoor-Fan Motor

Terminal Block

Factory Wiring

Field Power Wiring

Field Control Wiring

Printed Circuit Board

Accessory or Optional Wiring

NOTES:1. If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its equivalent.2. Wire in accordance with NEC and local codes.3. Transformer is thermally protected and will reset automatically.4. Indoor-fan motor(s) are inherently thermally protected.

Fig. 17 -- Control Circuit Connections Arrangement

]3

©

©

o /xo

FLAT THERMOSTAT (FLATSTAT)CARRIER

COOLING ONLYHEAT & COOL(53DFS250-FS)

. 70°t

o ©

SLIMLINE THERMOSTATCARRIER

HEAT PUMPCOOLING ONLYHEAT & COOL(53DFS250-SL)

-f-f AoTo

5-1-1 PROGRAMMABLE THERMOSTATCARRIER

COOLING ONLYHEAT & COOL(53DFST2-NP)

Fig. 18 -- Thermostats

]4

Step 8 -- Make Connections Between Indoorand Outdoor Units -- The thermostat is wired betweenthe indoor and outdoor units to make the system complete.CHECK ACCURATER METERING DEVICE The cor-rect AccuRater (bypass type) refrigermlt control is required tbrsystem capacity opthnization. An AccuRater device(see Fig. 19) is supplied with the outdoor unit. Refer toTables 4A-4C to determine the correct AccuRater piston sizeand charge combination required for the condenser/evaporatorsystem being installed.

Piston style as shown in Fig. 19 is shipped with the unit.Do not interchange components between the AccuRater devicetypes.

COOLING ONLY SYSTEMS The tbllowing connec-tions must be made to the outdoor unit for it to operate as a sys-tem with the indoor unit:

Route 2 wires of field-supplied 18-gage AWG (AmericanWire Gage) thermostat cable between the low-voltage terminalblock of the tan coil unit and the blue and brown low-voltagewires in the outdoor unit low voltage tenninat block. Connectthe wires Y1 to Y and C to C. See Fig. 20.

HEAT PUMP SYSTEMS The tbllowing connectionsmust be made to the outdoor unit tbr it to operate as a systemwith the indoor unit:

Route 5 wires of field-supplied 18-gage AWG thermostatcable between the low-voltage terminal block of the fan coiland the outdoor unit low-voltage terminal block. Connect Y1to Y, R to R, O to O, W2 to W2, mid C to C with the wires. SeeFig. 21.

The heat pump unit uses a timed defiost method. The timeddefrost cml be field set for 30, 50, or 90 minutes. The timed de-tiost is factory set for 90 minutes.

38HDR018-060

HEATING

CONNECTOR

METERED FLOW

_HEATING

LINE SET

/DRIER (BY OTHERS)

38QRR018-060

Fig. 19 -- AccuRater (Bypass Type)Metering Device Components

15

TIME DELAY RELAY TIMING SEQUENCE

COMPRESSOR

TDR 1 SEC_ RUN TIME _J _2 MIN,

BLACK DENOTE5 CLOBED CONTACT5

PUMP DELAY RELAY

POR T1 T3 [__ I

BLACK 0 E NoRTUENsT:_I:sED CO N TAOTS IRELAY CHART

INDOOR FAN HIGH FR2INDOOR FAN MED FR] FR2INDOOR FAN LOW FRI

LEGEND

r_ TERMINAL BLOCK-- FACTORY _ImNG

F[ELD CONTROL _]RINB

_ _ F[ELD POWER WIRIN_

ASM Am 5_EEP MOTOR IFM mDOOR FAN MmORASR Am 5WEEP RELAY LP5 LO_ PRESSURE S_ITCHAS_ Am _EEP SWITCH OFM OUTDOORF_N MOTORC CONTACTOR OFR OUTDOORFAN RELAYCAP CAPACITOR OL OVERLOADCOaT CRaNkCASE HEATER THERMOSTAT PDR PUMP DELAY RELAYca CRaNkCaSE HEATE_ PL PLU_CLO COMPRESSOR LOCKOUT PM PUMP MOTORCOMP COMPRESSOR PSS PUMP SHUT OFF 5WITCHCR CONTROL RELAY

DR DEFROST RELAY TDR TmE DELAY RELAYEOUm.GND. EOUmMENT GRUUND m_N TRANSFORMERFL FU_E LINKFPT FREEZE PROTEOTION THERMO£TATFR FAN RELAYHP HEAT PUMPHPS HIgH PRESSURE S_[TCHHR HEATER RELAYHm HEATERmT HEATER IEMP THERMOSTAT

NOTES

i IF ANY OF THE OR]_]NAL WIRE FURNISHED tlU_T BEREPLAOED, IT MUST BE REPLACED WITH TYPE 90_0 WIREOR [T_ EQUIVALENT

2 WIRE IN AOOORDANCEW[TH NATIONAL ELECTRICAL CODE {N E 0.)AND ALL LOCAL OODE_.

3 TRAN£FORMER I£ THERMALLY PROTECTED AND NILL RESET AUTOMAT[OALLY.

4 IFM(S),OFM ANB CDMP H_VE INTERNAL THERMAL PROTECTIBN

5. THE OLO LOCKS OUT THE COMPRESSOR TO PREVENT SHORT OYOON6ON OOMPRESSOR OVERLOADS AND SAFETY DEV[CES.BEFORE REPLACING CLO CHEOK THESE DEV]CES.M[NltlUtl ONE AMp TURN REQU[RED TO HOLD CONTAOT£ CLOSED.

6, Hi TERMINAL AND Hi TO H2 JUMPER USED ONLY WHEN INDOOR UNITI_ A HEAT PUMP MODEL,

? WHEN US]N6 THERMOSTAT WITH AIR SWEEP FUNCT]ON,YELLOW _IRE FROM _3 TO BE OONNECTED TO A£R1.BLACK NIRE TO BE DI£CONNEOTED FROM ASRI.LEAVE BLAOK W[RE TIE WRAPPED TO YELLOM WIRE.

8 CRANKCASE HEATER _ TSTAT USED ON SELECTED MODELS ONLY,

Fig. 20 -- Cooling System Wiring Diagram

16

208/230V1PH

TOOUTDOORUNIT DISCONNECT

DISCONNECTPERNEC

BLK_y

YEL OFM

EL_BLU

YEL

m _ BLK_[_IF_Z]) rrm BLK COMPeLKC_CHT _ _BLKNOTEe CN

= m _BLK YEL

38QRR

40QAQ

CONDENBATEPUMPPL8 ACCESBORY

BLU_>-'-BLU

BLU _>--'-BLU

THERMOSTAT

I

A_A_A_A_A_A_A_A_A_A_LT_LTERNATET'STATW/AmS_EEPFUNCTIONSEE NOTE

F_SEE NOTE7

,

11

®

YELI<lEZlao_o Kl

40QAO

380RR

--YEL

--BRN _ IR !--ORG S RV5 i

--ORG'_BLK-- BLKJ B N yL

--BLK-+BLK_ NOTEs

--BLK---4_--BLK_ I _ I BLU

....... .......BLK THFM

TIME DELAY RELAY TIMING SEQUENCE

TDR T1T2Fllilmilll_

BLACK DENOTES CLOSED CONTACTS

....... _M_ .... 5EC

30 5EC_I_ RUN TIME_

PDRT_T3p''_m'Rm'_I L_ .......... _ Lloo

I BLACKDENO:_::_;SEDCONTACT5

LEGEND

TERM ] NAL (MARKED]TERM]NAL (UNMARKED)

5PL[CETERM [ NAL BLOCK

FACTORY _IR]NG

F]ELD CONTROL _[R]NO

..... F]ELD PO_ER WIR[NG

PR]NTED C]RCU[T BOARD

_CCE_SORYOROPTIONALvm]Ne

ASM A[R SWEEP MOTOR ]FM INDOOR FAN MOTOR

A_R A[R S_EEP RELAY LLP_ LIBUID LO_ PRESSURE _]TCH

kSW A[R SWEEP S_[TCH OFM OUTDOOR FAN MOTOR

C CONTkCTOR OL OVERLOAD

O_P C_PAOITOR pDR PUMP DELAY RELAY

CCHT CRANKCASE HEATER THERMOSTAT pL PLUG

CH CRANKCASE HEATER pM PUMP MOTOR

CLO COMPRESSgR LOCKOUT p_5 PUMP _HUT OFF _]TCH

¢ONP COMPRESSOR

OR CONTROL RELAY RVS REVERS]N8 VALVE SOLEND]D

C_ CURRENT _ENSOR TB TERMINAL BLOCK

DFB DEFROST BOARD (OUTDOOR UNIT) TDR TIME BELAY RELAY

OFT DEFROST THERMOSTAT TRAN TRkN_FORMER

DR DEFROBT RELAY

EaUmGNO EQUmMENTOROUNOEL FUSE LINK

FPT FREEZE PROTECT[ON THERMOSTAT

FR FAN RELAY

HP_ HIGH PRESSURE SWITCH

HR HEATER RELAY

HTR HEATER

HTT HEATER TEMP THERMO5TAT

NOTES

1 IF kNY OF THE ORIG[NAL _[RE FURN]SHED MUST BE

REPLACED, ]T MUST BE REPLACEB _]TH TYPE BO=C _]RE

OR IT5 EQU]¥ALENT

2 UIRE IN ,_OCORDANCE WITH NAT]ONAL ELECTRICAL CODE (N.E C.)

AND ALL LOCkL CODES.

_, TRAN5FORMER I5 THERMALLY PROTECTED AND _[LL RESET AUTDMATID_LLY,

4, IFM[S),OFM AND COMP HAVE INTERNAL THERMAL PROTECT]ON,

5, THE CLO LOCKS OUT THE COMPRESSOR TO PREVENT SHORT CYCL[NG

ON COMPRESSOR OVERLOADS AND SAFETY DEVICE_.

BEFORE REPLAC[NG CLO CH_CK THE_E DEVICE_

MINIMUM ONE AMP TURN RE_U[RED TO HOLD CONTACTS CLOSED,

6, WHEN USIN_ THERMOSTAT _]TH A]R SWEEP FUNCTION

YELLOW W]RE FROM 63 TO BE CONNECTED TO ASRI,

BLACK UmE TO BE D]SCONNECTED FROM ASR1,

LEAVE BLACK W]RE T]E WRAPPED TO YELLOW W[RE,

2 TH[S CONNECTION REQUIRED FOR USE _/T'£TAT£ THat

HAVE LED LOCKOUT INDICATOR,

8 CRANKCASE HEATER _ T_TAT U_ED ON SELECTED MODEL_ ONLY

Fig. 21 -- Heat Pump Wiring Diagram

17

START-UP

Never operate unit without a filter or with _tle relnoved;

damage to the unit or personal injury may result.

Make the following checks and complete the Start-UpChecklist on page CL-1 betbre system start-up. Also refer tothe condensing unit Installation, Start-Up and Service Instruc-tions for system start-up instructions and reliigerant chargingmethods.

1. Check condensate drainage system:

a. Remove grille and frame fiOln the unit.b. On the opposite side of the drain connection, insert

a water bottle up into the fan coil unit and till drainpan. Refer to Fig. 22. Water must flow steadily; ifnot, check the pipe slope or inspect t\_r aW piperestrictions.

2. Make sure that all wiring connections are correct andthat they are tight.

3. Check that all barriers, covers, and panels are in place.Ensure that the tilters and return-air miltes have beeninstalled and that the discharge louvers are positionedcorrectly.

After Extended Shutdown -- If the systemhas beenturned off for more than 12hours and a crankcase heater is be-ing used, turn on the indoor and outdoor unit disconnectswitches to supply power to the system for 12 hours BEFOREstarting the system.

Seasonal Changeovers -- When changing heat pumpsystem from cooling to heating or heating to cooling, or beforestarting cooling only system after it has been out of use for thewinter season, perform the following steps BEFORE startingthe system:

1. Inspect and clean the outdoor unit, particularly thecoil.

2. Clean or replace the air filters in the indoor unit.

3. Clean the indoor unit drain pan and drain pipe, andremove any obstructions.

4. If the outdoor unit is equipped with a crankcase heater,turn on indoor and outdoor unit disconnect switches tosupply power to the system 12 hours bel\_re startingthe system.

Adjusting Airflow

AUTOMATIC AIR SWEEP All units are equipped withan air sweep feature which directs the airflow louvers up anddown to provide optimum room air circulation. The air sweepfunction can be controlled by the toggle switch located on thelower right comer of the unit. If using a thermostat with an airsweep switch, see Fig. 20 and 21 for wiring modifications.

Operating Mode Memory-- After the system isturned off oi after a power failure, the system relnains in thelast operating mode selected. When the system is turned backon, or when power is automatically restored, operation contin-ues in the same operating mode as when the system shut down.

Automatic Operation (Auto.) Mode -- If auto.mode is selected, the system automatically switches over theoperating mode tiom heating to cooling, or fiom cooling toheating (heat pump system only) depending on the selectedtemperature. Auto. mode also controls tan speed if not manual-ly overridden.

NOTE: Between the cooling cycle and the heating cycle thereis a neutral zone of approxilnately 2° F above and 2° F bebwthe selected temperature when only the tan is operating.

Operating Sequence -- Ceiling-suspended tan coilunits have a relay board which controls system operation in re-sponse to a room therlnostat. The user may malmally select anyone of 3 tan speeds tbr unit operation. Ceiling-suspended sys-tems may be equipped with an accessory power ventilation kitand/or condensate pump.FAN OPERATION Fan coils are capable of 3-speed opera-tion. See therlnostat instructions for tan speed selection. Whenthe l_aJl(s)is operating in mediuln or high speed and the unit isequipped with the power ventilation kit, the ventilation tan wiltoperate to provide tiesh air.COOLING MODE OPERATION When the room ther-mostat senses a demand for cooling, the fan coil relay board isenergized. The indoor tan(s) will start in the selected speed (ifit is not already operating). The reversing valve (heat pmnponly) will energize tbr cooling operation.

The internal condensate pump (if so equipped) runs when-ever the reversing valve is energized (heat pump only) and/orthe unit is in cooling. As long as the condensate float switchand fieeze protection thermostat are closed, the cooling relaysin the tZancoil unit wilt close. This eneNizes the compressorand outdoor tZaJlin the outdoor unit. The compressor will con-tinue to operate until the room therlnostat is satisfied. When thecooling demand is satisfied, the compressor and outdoor tanwill stop. If the system is in the AUTO. position, the indoor thnwill stop with the compressor. If the unit has the accessory ven-tilation kit, the ventilation fan wilt operate whenever the indoortan is set for medium or high speed.HEAT PUMP OPERATION When the room therlnostatsenses a demand for heating the indoor fan will start in theselected speed (if not aheady operating), and the reversingvalve will not be eneigized. The internal condensate pump (ifsupplied) and freeze protection therlnostat are not operatedduring heating operation. The control relay (CR2) closes, andthe compressor and outdoor fan are energized through the de-fiost board (DFB), which is located in the outdoor unit. Themicroprocessor logic in the DFB is energized when the com-pressor starts, and the defiost timer runs. Once every 90 min-utes (factory default setting) of compressor mn time, the DFBlogic checks the detiost therlnostat (DFT). It"the DFT is open,the unit continues in heating operation. If the DFT is closed, theDFB switches the unit to defiost mode. The timing on the DFBmay be set at either 30, 50, or 90 minutes.

DEFROST (Heat Pmnp Only) The DFB energizes theRVS (reversing valve solenoid), and the reversing valveswitches to the cooling position. The K1 relay on the DFBopens and the outdoor tan stops. The W2 contact on the DFB isalso energized, which in mm energizes the detiost relay on thetan coil relay board, rams off the electric heater and stops theindoor t:an.

The DFB logic checks the 10-minute defiost timer and theDFT. If the DFT opens in less than 10 minutes, the DFBswitches the unit back to norlnal heating operation. If the DFTrelnains closed, the DFB switches the unit back to heating op-eration after 10minutes. When the DFB changes back to heat-ing mode, the RVR (reversing valve relay) is deenergized andthe reversing valve switches back to heating operation. Boththe outdoor and indoor tZaalscome back on, and if necessary, theelectric heater also turns on.

SYSTEM SAFETIES The system is equipped with thefollowing safety devices to protect system components:

Indoor coil tieeze protection therlnostat Ifa coil telnper-amre of 28 F or lower is sensed, the compressor and outdoortan wilt be shut do,a_ until the coil temperature exceeds 28 F.The indoor tan will continue to ran.

Condensate float switch (units equipped with accessorycoMensate pump, cooling cycle only) If the level of con-densate in the drain pan rises too high, the condensate floatswitch will turn the system off"

18

SPECIALOPERATION,HEATING Outdoorcoolingunitsmaybematchedwithheatpumpceiting-suspeMedtancoilunitstoprovidesupplementalelectricheat.All otheroperationisthesameasacooling-onlysystem,excepttheseunitshaveheatingcapabilityasfollows:

Whentheroomthermostatinitiatesacallforheating,theelectricheateristurnedon.Theindoorunittanwillstartatthesametime,if itwasnotalreadyrunning.

Whentheheatingrequirelnentissatisfied,theroomthermo-statwillopen,andtheheaterwiltturnoft'.

CLEANING AND MAINTENANCE

LOUVERS

To avoid the possibility of electric shock, before pertbnningany cleaning and maintenance operations, always tum offpower to the system by pressing the mode button on theremote thermostat until the display shows "OFF," and turn-ing off the outdoor disconnect switch located near the out-door unit. If the indoor unit is on a separate switch, be sureto turn this disconnect offas well.

Do not wash filter in ,a_aterover 120 F (to avoid shrinkage).Do not expose filter to tire (to avoid tire dmnage). Do notexpose filter to direct sunlight. Clean filter more tiequentlywhen air is extremely dirty.

For proper system operation, perform the cleaning andmaintenance operations in Table 6.

Lubrication -- The indoor-fan, automatic air sweep, and theoutdoor-tZanlnotors are factory lubricated and require no oiling.

Fig. 22 -- Inserting Water into Drain Pan

Air Filters (Fig. 23)

Operating the system with dirty air filters may dmnage theindoor unit and, in addition, can cause reduced cooling per-fonnance, intermittent system operation, frost build-up onthe indoor coil, and blown fuses, hlspect and clean orreplace the air filters monthly.

REMOVE AIR FILTERS Relnove filters by pulling themstraight out.CLEAN OR REPLACE FILTERS Filters can be vacu-umed or washed in warm ware1: Shake filter to remove any ex-cess water, and replace by sliding filter behind mille until filtersnaps in place. Rel}r to Fig. 23.

If the filter has begun to break down or is tom, replace it.Replacemem filters are available through your dealer.

Table 6 -- Cleaning and Maintenance Schedule

QUARTERLY YEARLY

XXX

X

X

TASK MONTHLY

INDOOR UNITClean Air Filters XClean Drain PipeClean Condensate Drain PanClean Indoor CoilClean Indoor Unit Front Panel

OUTDOOR UNITClean the Fins From OutsideOpen the Unit and Clean Fins InsideRemove Dust From Electrical PartsCheck Electrical Connections are TightClean Outdoor FanClean Outdoor CoilCheck that Outdoor Fan Assembly is TightClean Drain Pan

NOTE: Maintenance procedures for the outdoor units are in the individual unit installation instructions.

XXXXXX

19

CleanIndoor Unit Bottom Panel--It'the bottom panelof the unit becomes dirty or smudged, wipe the outside of thepanel with a soft dry cloth. Use a mild liquid deteNent andwipe offcarefulty with a dry cloth.

Clean Indoor Coil -- To clean the coil, relnove iMoor unitbottom panel and vacumn the coil fins, using care not to bendor damage fins.

Clean Outdoor Coil (Outdoor Unit)

Some metal parts and sharp fins of outdoor unit coil cancause personal injury during cleaning. Clean coil carefully.

To clean the outdoor coil:

1. Remove any dirt or obstruction fiom dischargeopening.

2. Use a garden hose to spray water on the coil. Debristhat collects between coil fins inhibits heat transferdirect the water spray bewveen coil fins to flush outdebris.

Clean Condensate Drains- Clean all drains and drainpans at the start of each cooling season. Check the flow bypouring water into the drain.

CLEAN OR REPLACE DRAIN PAN

1. Place a plastic sheet on the floor to catch any waterthat may spill fioln drain pan.

2. Remove the intake grille and distribution asselnbty(attached).

3. Remove the condensate water in the drain pan by let-ting water drain into a 3-gallon bucket.

Do not use a screwdriver to pry drain pan out of asselnblyit could damage the pan.

4. Remove the 4 screws holding the drain pan.

5. Carefully hold the drain pan to remove it fiom theassembly.

SERVICE

When servicing unit, mm off all electric power to unit toavoid shock hazard or injury fiom rotating parts.

Do not vent refrigerant to atmosphere when selwicing unit.Recover refrigerant during system repair or unit removal.

A. REMOVE FILTERS

INTAKEGRILLE B. WASH FILTERS, _{("'_._

OR

C. VACUUM FILTERS

Fig. 23 -- Cleaning Filters

Before Calling for Service-- Save the cost of a servicecall by doing the following:

1. Be sure main power to system is turned on.

2. Press Mode button until OFF is displayed. Wait 5 min-utes.

3. Press Mode button until either COOL or HEAT is dis-played (as desired).

4. Adjust therlnostat set point to desired room tempera-ture. If system starts within a few minutes, service maynot be necessary. If system does not operate properly,check Table 7 for typical solutions.

IF SYSTEM FAILS TO OPERATE Be sure:

• unit ON/OFF switch is in ON position• fuse or circuit breaker is not tripped

FRESH AIR INSTALLATION OPTION

The units have an installation option, which allows tbr fieldinstallation of fiesh air ventilation. Plan the installation careful-ly. Before begilming, measure carefully and follow acceptablebuilding practices, NEC, and local codes.

Ventilation-Air Accessory -- Refer to ventilation airaccessory installation instructions.

TROUBLESHOOTING

If the under-ceiling fan coil unit fails to start or operateproperly, solnetilnes the problem is minor and can be handledwithout a service call. Refer to Table 7 for some comlnon prob-lems, causes, and typical solutions. See Fig. 20 and 21 for addi-tional system troubleshooting details. If the probleln cannot becorrected, contact a local dealer for further assistance.

20

Table 7 -- Troubleshooting

PROBLEM

System Does Not Start.

System Does Not Cool Properly.

System Does not Heat Properly.

Ice or frost has Formedon Indoor Coil.t

Insufficient Airflow.

CAUSE

Blown fuse or circuit breaker tripped at buildingpower entry.Indoor and/or outdoor unit disconnect switch is off,

Thermostat is set to night mode.Power failure.

Unit is in off mode.

Three-minute time delay is running,

Temperature is above or below the selectedtemperature.

Air filter(s) in indoor unit is dirty or needs to bereplaced.

Temperature is set too high or too low.

Outdoor unit outdoor coil restricted.

Fan speed is set too low.

Air filter(s) in indoor unit is dirty or needs to bereplaced.

Temperature is set too high or too low.

Outdoor unit outdoor coil restricted.

Fan speed is set too low.

Outdoor unit outdoor coil is frosted up.

Low outdoor-air temperature.

Air filter(s) in indoor unit is dirty or needs to bereplaced.

Air filter(s) in indoor unit is dirty or needs to bereplaced.Fan coil unit coil is blocked,

TYPICAL SOLUTION

Replace fuse or reset circuit breaker.*

Turn on disconnect switch(es),

Cancel mode using Day/Night button on thermostat.

Restore power.Press Mode button on thermostat until thermostatdisplays the desired unit mode.Wait for 3 minutes.

Select new temperature using the thermostat,

Clean or replace air filter(s).

Reset temperature to desired comfort setting usingthe thermostat.

Remove obstruction.

Adjust fan speed to high or auto. using the Fanbutton on the thermostat.

Clean or replace air filter(s).

Reset temperature to desired comfort setting usingthe thermostat.

Remove obstruction.

Adjust fan speed to high or auto. using the Fanbutton on the thermostat.

Check manual defrost timer setting and adjust asnecessary.

Run system in fan-only mode until frost is gone.

Clean or replace air filter(s).

Clean or replace air filter(s).

Clean air discharge louvers.

*If fuse blows or circuit breaker trips again after first start attempt, DO NOT attempt to start system again.Contact your local dealer for assistance.

1-When outdoor temperature is approximately 55 F or below, indoor coil frosting may occur when system isoperated in cooling or maximum dehumidification mode. Units are not intended to operate below 55 Fwithout appropriate accessories.

2!

SERVICE TRAINING

Packaged Selwice Training promams are an excellent way to increase your knowledge of the equipmentdiscussed in this manual, including:

• Unit Familiarization • Maintenance

• Installation Overview • Operating Sequence

A large selection of product, theory, and skills pro_mns are available, using popular video-based formatsand materials. All include video and/or slides, plus companion book.

Classroom Service Training which includes "hands-off' experience with the products in our labs can meanincreased confidence that really pays divideMs in taster troubleshooting and fewer callbacks. Comsedescriptions and schedules are in our catalog.

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Copyright 2006 Carrier Corporation

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations,

Catalog No. 02-40QA0007-SI Printed in U.S.A. Form 40QA-7SI Pg 22 3-06 Replaces: 40QA-5SI

START-UP CHECKLIST

I. PRELIMINARY INFORMATION

OUTDOOR UNIT: MODEL NO.

INDOOR UNIT: MODEL NO.

SERIAL NO.

SERIAL NO.

ACCESSORIES:

PISTONS: INDOOR SIZE:OUTDOOR SIZE:

REFRIGERANT PIPING: EQUIVALENT LINE LENGTH:

LIFT: FAN COIL ABOVE OUTDOOR UNIT?FAN COIL BELOW OUTDOOR LEGIT?

II. PRE-START-UP

INDOOR LEGIT(REFER TO OUTDOOR LEGITINSTALLATION INSTRUCTIONS FOR OUTDOOR UNITPRE-START-UP FLEGCTIONS)

IS THERE ANY SHIPPING DAMAGE?

IF YES, WHERE?

WILL THIS DAMAGE PREVENT LEGITSTART-UP?

IS POWER SUPPLY CORRECT?

HAS GROUND WIRE BEEN CONNECTED?

HAS THE CORRECT SIZE FUSE OR HACR BREAKER BEEN PROVIDED?

ARE POWER WIRES TO THE LEGITSIZED AND INSTALLED PROPERLY?

IS THE DISCONNECT SWITCH INSTALLED WITHIN SIGHT OF THE UNIT?

IS THE LOW-VOLTAGE CABLE (INDOOR TO OUTDOOR LEGIT)RLEGAND CONNECTED PROPERLY?

HAS CONDENSATE DRAIN BEEN RLEG,SLOPED AND TRAPPED PROPERLY?

IS FILTER(S) IN PLACE?

IS LEGITMOLEGTEDLEVEL?

IS HEATING PISTON INSTALLED (FIG 13), THE CORRECT SIZE, AND IN THE CORRECT DIRECTION?

III. PIPING

IS A LIQUID LINE SOLENOID INSTALLED IF REQUIRED BY LONG-LINE APPLICATIONS ?

IS FILTER DRIER INSTALLED AT THE OUTDOOR UNIT?

HAVE LEAK CHECKS BEEN MADE AT THE COMPRESSOR, OUTDOOR UNIT, FLARE CONNECTIONS, FILTERDRIERS, AND FUSIBLE PLUGS WITH A LEAK DETECTOR?*

*FIELD PIPING AND ALL TUBING CONNECTIONS MUST BE LEAK TESTED BY THE PRESSURE METHOD DE-

SCRIBED IN CARRIER GENERAL TRAINING FOR AIR CONDITIONING MANUAL (GTAC2), MODULE 5. USE R-22AT APPROXIMATELY 25 PSI(+ BACKED UP WITH AN INERT GAS TO REACH A TOTAL SYSTEM PRESSURE NOTTO EXCEED 245 PSIG

CL-1

START-UP CHECKLIST (cont)

HAS PIPING SYSTEM BEEN EVACUATED TO 1000 MICRONS (IF REQUIRED)?

HAS SYSTEM CHARGE BEEN WEIGHED IN (IF REQUIRED)?

HAVE SERVICE VALVES BEEN FULLY BACKSEATED?

CHECK VOLTAGE: IS VOLTAGE WITHIN RANGE SHOWN FOR UNIT (WITH UNIT OPERATING)?OUTDOOR INDOOR

IV. START-UP

IF UNIT HAS A CRANKCASE HEATER_ HAS IT BEEN ON FOR 24 HOURS?

MEASURE AND RECORD THE:

AIR ENTERING OUTDOOR U_qIT:

AIR ENTERING INDOOR UNIT:

DISCHARGE LINE TEMPERATURE:

VAPOR LINE TEMPERATURE:

MEASURE AND RECORD THE:

VAPOR LINE PRESSURE:

DISCHARGE PRESSURE:

PSIG

PSIG

F

F

F

Copyright 2006 Carrier Corporation

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 02-40QA0007-SI Printed in U.S.A. Form 40QA-7SI Pg CL-2 3-06 Replaces: 40QA-5SI

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