CARRIER Air Conditioner/heat Pump(outside Unit) Manual L1002284

User Manual: CARRIER CARRIER Air conditioner/heat pump(outside unit) Manual CARRIER Air conditioner/heat pump(outside unit) Owner's Manual, CARRIER Air conditioner/heat pump(outside unit) installation guides

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to the Expertg

Installation Instructions

40QAC, QAQ []nit

38HDR, QRR []nit

NOTE: Read the entire instruction manual before starting the

installation.

[]NIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could result in personal injury or

equipment damage.

Puron refrigerant systems operate at higher pressures than

standard R-22 systems. To avoid damage to the unit or

possible personal injury, do not use R-22 service equipment or

components on Puron refrigerant equipment.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance,

or use can cause explosion, fire, electrical shock, or other

conditions which may cause death, personal injury, or property

damage. Consult a qualified installer, service agency, or your

distributor or branch for information or assistance. The qualified

installer or agency must use factory-authorized kits or accessories

when modifying this product. Refer to the individual instructions

packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing,

and work gloves. Use quenching cloth for brazing operations.

Have fire extinguisher available. Read these instructions

thoroughly and follow all warnings or cautions included in

literature and attached to the unit. Consult local building codes and

current editions of the National Electrical Code ( NEC ) NFPA 70.

In Canada, refer to current editions of the Canadian electrical code

CSA 22.1.

Recognize safety information. This is the safety-alert symbol

When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury. Understand

these signal words; DANGER, WARNING, and CAUTION. These

words are used with the safety-alert symbol. DANGER identifies

the most serious hazards which will result in severe personal injury

or death. WARNING signifies hazards which could result in

personal injury or death. CAUTION is used to identify unsafe

practices which would result in minor personal injury or product

and property damage. NOTE is used to highlight suggestions

which will result in enhanced installation, reliability, or operation.

ELECTRICALSHOCK HAZARD

Failure to follow this warning could result in personal

injury or death.

Before installing, modifying, or servicing system, main

electrical disconnect switch must be in the OFF

position. There may be more than 1 disconnect switch.

Lock out and tag switch with a suitable warning label.

PERSONAL INJURY AND EQUIPMENT DAMAGE

HAZARD

Failure to follow this caution may result in personal injury

and /or equipment damage.

DO NOT operate the unit without a filter or with grille

removed.

DIMENSIONS - INDOOR

NOTES:

1. Dimensions in [ ] are in millimeters.

2. _ Direction of airflow.

3. Standard unit clearances are as follows:

• 0 in. on tou and rear

• 3 in. on left side

• 12 in. on riqht side

• 36 in.on bottom

(When facing unit discharge.)

0"-10" CONTROL BOX ; G- F___]__I

[254] HIGH VOLTAGE KNOCKOUT

O" 2 11116" "-4"

[881 [102] 0'-1 5/8" [42] 1

....... I--°- -----I ..........................................................................................

[214_ I _ -%2_Y'31 II i $ 11 _ /I \ P"

[19O] ..... I I_

REAR VIEW I 0"-77/[B'_ I [t_'T_,_ [ ) { )I

--- | [ _ '4* I 0"-4" [102] \/" k_/

CONDENSATEPUNPA3[SE AoLR EY.F:A2E. UIR\\........ \ / o.8.O,ON,

(20" MAX. LIFT) 0"-3 5/8" LOW VOLTAGE TO OUTDOOR UNIT AND THERMOSTAT

_ _;:I _\\-_-_--L::F::;RANT pIp IN° CONN .(VAPOR SIDE) _, /

I]I _ _8;_?LE PLARE (018, 024) _ POWER VENTILATION ACCESSORY

0'-4 7/8" L_ 3/4"MALE FLARE(036,048,OEO)

_-_ ____ _O3/_NNpAIPING CONN, (3/4. HALE NFT) B DUCT RING

[131]

_0'-1 11116"

[42]

0"_-5 I/8"

[130]

L

POWER VENTILATION ACCESSORY

MINIMUM 0'-3 _ [763 CLEARANCE

REOUIRED IN BACK OF UNIT

V--_- {-

O' 4_/4 °

1t093

TOP VIEW o'-11L

J [2783

0"-8/16"

[8] -_7

FRONT VIEW [253]

0"-6 9/16"

[I87]

AUTOMATIC AIR SWEEP LOUVERS _

-- REVERSE BRACKETS FOR

OPT IONAL CONCEALED MOUNTING _ O' - 10_

(4)MOUNTING BOLT HOLES 0"-1 1/8" [254]

-1/2 DIA X 1 LONG 0'-1 1/4" [291 '-4"

...............................................rlO.q

ALTERNATE TOP POWER-'/ I [I72]_-,-II_I[

ENTRANCE KNOCKOU] !! L I

B

I

8

E

A

_0'-2 tl/]6"

[69]

TOP ACCESS FOR WIRING,

REFRIGERANT g ACCESSORY

CONDENSATE DRAINAGE

[OPTIONAL)

ACCESS TO CONDENSATE

PUHP THRU SIDE PANEL

WEIGHT (Ib) A

UNIT

SIZE Cooling Heat if-in, mm

Only Pump

024 108 110 4-215/16 1294

036 117 119 4-1013/16 1493

048 149 151 5-119/16 1817

060 179 181 7-8 2336

B E F

if-in, mm if-in, mm if-in, mm if-in.

3-10 1169 4-15/8 1260 -- -- 1-95/8

4--57/8 1368 4--91/2 1459 -- -- 2--11/2

5--65/8 1692 5--101/4 1783 1--97/8 555 3--31/16

7--3 2211 7--65/6 2302 1-- 115/6 601 4-- 119/16

A08580

mm

549

648

992

1512

Fig. 1 - 40QA Dimensions

UNIT SERIES

38HDRO18

38HDRO24

38NDR030

38NDR036

38HDRO48

38NDRO60

I

1.2

t

I

1,2

1,2

ELECTRICAL

CHARACTERISTICS

x0 0 0

X 0 0 0

x0 0 I 0

x o x I x

xox I x

XlOlXlX

6 '-9, 6 eb

('0 "T', (_0 ,

04 0 04 0

,_ o

V

A

L

LIL,

OPERATING

A B C D E FG H J KLMN P WEIGHTIIbsl

Z5 I18" 36 15116" 14 9116" 16" Z3 7116" 17 3116" 17 118" 22" 13" 6 518" 11 I14" 518" 215116" 6" 155

31 1/8" 36 15/16" 14 9/16" 16" 23 T/16" 17 3/16" 23 1/8" 28" 14" 6 3/4" 11 5/8" 5/8" 215116" 6" 180

37 3116" 44 9116" 17 I116" 18 7116" 30 IIZ" 19 518" 29 3/16" 34 I116" 13 11116" 8 118" t5 7/8" 314" 3 7/16" 6 I12" ZOO

37 3/16" 44 91t6" 17 1/16" 18 7/16" 30 1/2" 19 5/8" 29 3/16" 34 1/16" 13 11/16" B 1/8" t5 7/8" 314" 3 7/16" 6 1/2" 218

4_ 3/16" 44 9/161 17 1/161 18 T116" 30 I/Z I19 _181 3S _/161 40 1/161 14 I/Z I 8 I/Z I 18 7/S I 718" 3 7/16" 6 IIZ" Z8J

43 3116" 44 9116" 17 I116" 18 7/16" 30 IIZ" 19 518" 35 3/16" 40 I116" 14 IIZ" 8 I12" 18 7/8" 718" 3 7/16" 6 I12" 294

x : YES

0 : NO

E

lAIR p

I 1/2" f2 1/2"

_--'_L 4 3/16-

t '

K

lAIR J_

H'"'"''"'"'""......... FIELD CONTROL SUPPLY""-----....

WIRE ENTRY

7/8" HOLE W/GROMMET

/-_M VAPOR LINE CONN.

FEMALE SWEAT CONN.

_-_3/8" LIOUID LINE

FEMALE SWEAT CONN,

1

L

!

1

1"

re,,,_

J r

0

B.

HI

2.

3,

4,

5

JUNCTION 80X FOR

POWERSUPLLY AND

CONTROLCONNECTIONS

_t 1/2"

t

L4 I12"

SHIPPING

WEIGHTllbs)

171

198

223

240

309

SHIPPING

DIMENSIONS(L x W x H)

429110-x 18-x281/10-

42 9110" X18" X 34 1/10"

50 1/2" X 20 1/2" X 40 2/10"

50 1/2" X 20 1/2" X40 2/10"

SO 112" X20 1/2" X4G 2/10"

319 50 1/2" X 20 1/2" X46 2/10"

REOUIRED CLEARANCES: WITH COIL rACING WALL; ALLOWG" MIN

CLEARANCEON COIL SIDE AND COIL END AND 3G" MIN CLEARANCE

ON COMPRESSOREND AND FAN SIDE. WITH FAN FACING WALL; ALLOW 8" MIN

CLEARANCEON FAN SIDE AND COIL END AND 36" MIN CLEARANCE

ON COMPRESSOREND AND COIL SIDE. WITN MULTI UNIT APPLICATION;

ARRANGEUNITS SO DISCHARGE OF ONE DOES NOT ENTER INLET OF ANOTHER.

MINIMUM OUTDOOR OPERATING AMBIENT IN COOLING

MODE IS 55°F. MAX. 125°F.

SERIES DESIGNATION IS THE 13TH POSITION OF THE

UNIT MODEL NUMBER,

CENTER OF GRAVITY_

ALL DIMENSIONS ARE IN "INCHES" UNLESS NOTED.

UNITSI_ MOUNT_ PAD

D_

18,24 23" X 42"

30,36,48.60 24" X 50"

POWERSUPPLY CONN.

HOLE SIZES PROVIDED:

718"-1/?"TRADE

13/1G"-314"TRADE

1 318"-1"TRADE

17111

Fig. 2 -38HDR Outdoor Unit Dimensions -English

UNIT

38HDR018

38HDR024

38HDR030

38HDR036

38HDR048

38HDR060

I

1,2

I

I

1.2

1,2

I

F

I

I

A

I

EL_

CHARACll_

xOOO

xOOO

xO OIO

x o XlX

x o XlX

XlOlXIX

!!/1

t- 175

A B C D E F G H J K L M

638.2 938.2 369.9 406,4 595.3 436,6 435.0 558,8 330.2 t68,3 285,8 15,9

790.6 938,2 369,9 406.4 595.3 436.6 587.4 711.2 355.6 171,5 295.3 15,9

944,6 1t3t.9 433,4 4G8.3 774,7 498,5 741,4 865.2 347.7 20G.4 403.2 19.0

944.6 1131.9 433.4 468.3 774.7 498.5 741.4 865.2 347.7 206.4 403.2 19.0

t097.0 1t31.9 433.4 468,3 774.7 498.5 893,8 1017,G 368,3 215,9 479,4 22,2

1097,0 1131_9 433,4 468,3 774.7 498,5 893,8 1017,G 368,3 215,9 479.4 22,2

X = YES

O: NO

lAIR LL I

190,5_

t

K

1

2,

3.

4,

5,

N p 0PB_ATING_

WBQHT'_G)int0t.mKO)Dt,ABVSK3NSLxWx

74,6 t52.4 70,4 77,7 1090,2 X 457,7 X 714,3

74_G 152.4 81.8 90,0 1090.2 X 457,7 X 8GG,7

87.3 tG5.t 90.9 101.4 1282.7 X520.7 X1020,7

87.3 165.1 99.0 109.0 12B2.7x520.7x1020.7

87,3 t65.t t29,0 140,4 1282,7 X 520,7 X 1173,1

87.3 165.1 t33,6 145.0 1282,7x 520.7x 1173.1

REOUIREDCLEARAHCES: WITH COIL FACIHG WALL; ALLOW152,4 XIH

CLEARANCEON COIL SIDE AND COIL END AND 914,4 MIN CLEARANCE

OH GOMPRESSOREHD AND FAH SIDE, WITH FAN FACING WALL; ALLOW203.2 MIN

CLEARANCEON FAN SIDE AND COIL END AND 914,4 MIN CLEARANCE

ON COMPRESSOREHD AND COIL SIDE. WITH MULTI UNIT APPLICATION;

ARRANGEUNITS SO DISCHARGEOF ONE DOES NOT ENTER INLET OF ANOTHER,

MINIMUM OUTDOOROPERATING AMBIENT [H COOLING

MODE IS 12._C. MAX. 51.?C.

SERIES DESIGNATION IS THE 13TH POSITION OF THE

UNIT MODELNUMBER,

CENTEROF GRAVITY_

ALL DIMEHSIONS ARE IN "MM" UNLESS NOTED.

uNrr sizz MOUNTINGPAD

18.24 584.2 X t066.8

30,36.48,60 609,6 X1270,0

B

• '"'"'".................... 'FIELD CONTROLSUPPLY_

WIRE ENTRY

22.22 HOLE W/GROMMET

JUNCTION BOX FOR

POWERSUPLLY AND

CONTROLCONNECTIONS

,I f

D

"L

r

38,1

_M VAPORLINE CONN. ]

FEMALE SWEATCONN. GI/

l

FEMALESWEATCONN.

H

1

36.5-"

FIELD POWERSUPPLYCONN.

HOLE SIZES PROVIDED:

22.22 -12.70 TRADE

30,16 -19,05 TRADE

34.92 -25.40 TRADE

Fig. 3 -38HDR Outdoor Unit Dimensions -SI

UNIT 5B_IES

38QRR018

38QRRO24

38QRR030

38QRRO36

38QRR048

380RR060

0

0

0

0

0

0

T

F

I

E_C_CAL

CHARACT_S_CS

x 0 0 0

XlOlOlO

X0010

X0xlx

X 0 XlX

Xl°lXIN

A B C D E F G H JK L M N P

25 1/8" 36 t5/t6" 14 9/16" t6" 23 7/16" 17 3/16" t7 1/8" 22" 13" 6 5/8" 1t 1/4" 5/8" 2 15!16" 6"

31 I18" 36 15116" 14 9116" 16" 23 7116" 17 3116" 23 I18" 28" 14" 6 314" 11 518" 518" 2 15116" 6"

37 3116" 44 9116" 17 1116" 18 7116" 30 112" 19 518" 29 3116" 34 1116" 13 11116" 8 118" 15 718" 314" 3 7116" 6 112"

37 3116" 44 9116" 17 1116" 18 7116" 30 112" 19 518" 29 3116" 34 1116" 13 11116" 8 118" 15 718" 314" 3 7116" 6 112"

43 3116" 44 9116" 17 1116" 18 7116" 30 112" 19 518" 35 3116" 40 1116" 14 112" 8 112" 18 718" 718" 3 7116" 6 112"

43 3116" 44 9116" 17 1116" 18 7116" 30 112" 19 518" 35 3116" 40 1116" 14 112" 8 112" 18 718" 718" 3 7116" 6 112"

IAIR

I

IAIR

f

K

l

VAPOR LINE CONN,

FEMALE SWEAT CONN,

LIOUID LINE

MALE FLARE CONN.

FIELD CONTROL SUPPLY_---_

WIRE ENTRY

718" HOLE WIGROMMET

I

L

oF-i

[]

2.

3,

4,

5.

JUNCTION BOX FOR

POWER SUPLLY AND

CONTROL CONNECTIONS

_t 1/2"

G

,1

8"

X : YES

0:NO

OPB_ATING SHIPPING SHIPPING

WBGHTabs)WBGHTllbs)DIMB_ISIONS(L x WxHI

167 183 429110.x_o,,x 28ino"

176 194 42 9/10" X 18" X 34 1/10"

187 210 50 1/2" X 20 1/2" X 40 2/10"

232 255 50 1/2" X 20 1/2" X 40 2/10"

278 303 50 t/2" X 20 t/2" X 46 2!10"

306 331 50 112" X 20 112" X 46 2110"

REOUIRED CLEARANCES: WITH COIL FACING WALL; ALLOW 6" MIN

CLEARANCE ON COIL SIDE AND COIL END AND 36" MIN CLEARANCE

ON COMPRESSOR END AND FAN SIDE. WITH FAN FACING WALL; ALLOW 8" MIN

CLEARANCE ON FAN SIDE AND COIL END AND 36" MIN CLEARANCE

ON COMPRESSOR END AND COIL SIDE. WITH MULTI UNIT APPLICATION;

ARRANGE UNITS SO DISCHARGE OF ONE DOES NOT ENTER INLET OF ANOTHER.

MINIMUM OUTDOOR OPERATING AMBIENT IN COOLING

MODE IS 55°F, MAX. 125°F.

SERIES DESIGNATION IS THE 13TH POSITION OF THE

UNIT MODEL NUMBER,

CENTER OF GRAVITY_

ALL DIMENSIONS ARE IN "INCHES" UNLESS NOTED.

_IhlIVlUM

UMT SITW MOUNTINGPAD

DIMB_ISIONS

18,24 23" X 42"

30,36,48,60 24" X 50"

POWER SUPPLY CONN,

HOLE SIZES PROVIDED:

718"-II2"TRADE

1 3116"-314"TRADE

1 318"-I"TRADE

Fig. 4 -38QRR Outdoor Unit Dimensions -English

UMT SB:IIES BCDE FGHJK L M

380RR018 0 638.2 938.2 369.9 406.4 595.3 436.6 435.0 558.8 330.2 168.3 285.8

380RR024 0 790.6 938.2 369.9 406.4 595.3 436.6 587.4 711.2 355.6 171.5 295.3

380RR030 0 944.6 1131,9 433,4 468.3 774,7 498,5 741.4 865.2 347,7 206,4 403.2 1282.7 X 520.7 X 1020,7

380RR036 0 944.6 1131.9 433.4 468.3 7?4.7 498.5 741.4 865.2 347.7 206.4 403.2 1282.7 X 520.7 X 1020.7

380RH048 0 1097,0 1131.9 433,4 468.3 774.7 498,5 893.8 1017.6 368.3 215,9 479.4 1282,7 X 520.7 X 1173,1

380RR060 0 1097.0 1131.9 433.4 468.3 774.7 498.5 893.8 1017,6 368,3 215.9 479.4 1282.7 X 520.7 X 1173.1

B.ECTRICAL

CHARAC'I'B_ISTICS

x 0 0 0

x 0 0 0

x 0 0 I0

x 0 x I x

x 0 x I x

XlOlXlX

o 8

X:YES

0:NO

!!r'll

IAIR J uu'

F

I

-B

OPERATING

N P WBOHT(KO)

15.9 74.6 152.4 75.9

15.9 74.6 t52.4 80.0

19.0 87.3 165.1 85.0

19.0 87.3 165.1 105,4

22.2 87.3 t65.1 126.4

22.2 87.3 165.1 139.0

I.

I 2.

E4.

190,5 F 63.5 5,

SI-IPRNG

WBGHT(KO)

83.2

88.2

95,4

115.9

137.7

150,4

SHIPPING

DIMB_51ONG(L xWxH)

1090.2 X 457.7 X 714.3

1090.2 X 457.7 X 866.7

REOUIRED CLEARANCES: WITH COIL FACING WALL; ALLOW152,4 MIN

CLEARANCE ON COIL SIDE AND COIL END AND 914.4 MIN CLEARANCE

ON COMPRESSOR END AND FAN SIDE, WITH FAN FACING WALL; ALLOW 203,2 MIN

CLEARANCE ON FAN SIDE AND COIL END AND 914.4 MIN CLEARANCE

ON COMPRESSOR END AND COIL SIDE. WITH MULTI UNIT APPLICATION;

ARRANGE UNITS SO DISCHARGE OF ONE DOES NOT ENTER INLET OF ANOTHER.

t

K

MINIMUM OUTDOOROPERATING AMBIENT IN COOLING

MODE IS 12.8°C, MAX. 51.7°C.

106.4

FIELD CONTROL SUPPLY_------_

WIRE ENTRY

22.22 HOLE WlGROMMET

VAPOR LINE CONN.

FEMALE SWEAT CONN,

LIOUIDLINE

MALE FLARE CONN.

T

L

o

.I/

o

@[]

r

° _.L._u

JUNCTION BOX FOR

POWER SUPLLY AND

CONTROL CONNECTIONS

38.1

G

t

SERIES DESIGNATION IS THE 13TH POSITION OF THE

UNIT MODEL NUMBER.

CENTER OF GRAVITY_

ALL DIMENSIONS ARE IN "MM" UNLESS NOTED.

MINIMUM

UNIT SI2_ MOUNTINGPAD

DIIVlB_51ONS

18,24 584,2 X 1066.8

30.36,48,60 609,6 X 1270.0

36.5 _

FFIELD POWER SUPPLY CORN,

/HOLE SIZES PROVIDED:

/22,22 - 12.70 TRADE

/30.16 -19.05 TRADE

_/34.92-25.40TRADE

25,4

q 203.2

1

114.3

Fig. 5 -38QRR Outdoor Unit Dimensions -SI

These installation instructions cover the installation of the matched

systems listed in table 2.

Parts List

Indoor Unit

The following items are included with the indoor unit:

Table I -Installation Materials

Part No. Name of Part Qty.

1 Side Panels 2

2 Hex Head Bolts 4

3 Mounting Bracket 2

4 Pistons 1

5 Installation Template 1

6 Adapter Tubes 2

MOUNTING

SLOT

HEX-HEAD

BOLT

Fig. 6 - Hanging Fan Coil Unit

Outdoor Unit

The following items are included with the outdoor unit:

A09532

u-FILTER /

Fig. 7 -38HDR018-036

A09536

_F PISTON

HEATING

PISTON CAP FILTER _._LINE SET

__ET_ERE_I_/--FLARE /--/DRIER !(BY OTHERS)

HEATING

Fig. 8 -38QRR018-036

A09537

Piston Flare

Model Filter Drier Pistons

Cap Connector

38HDR _" - - -

38QRR w- w- w- w-

Table 2 - Matched Systems

System Nominal

Type Capacity Outdoor Unit Indoor Unit

40QACO24- - -3

018 38HDRO18---3 .

024 38HDR024---3 40QAC024---3

==

"- 030 38HDR030---3 40QAC036---3

"5

o

O 036 38HDR036---3/5/6 40QAC036---3

048 38HDRO48- - -3/5/6 40QACO48- - -3

060 38HDRO60- - -3/5/6 4OQACO6O- - -3

018 38QRRO18---3 40QAQO24---3

_. 024 38QRRO24- - -3 40QAQO24- - -3

_= 030 38QRRO30---3 40QAQO36---3

iD.

036 38QRRO36- - -3/5/6 40QAQO36- - -3

:'r 048 38QRRO48- - -3/5/6 40QAQO48- - -3

060 38QRRO60- - -3/5/6 4OQAQO6O- - -3

Units must be configured for 1-1/2 ton operation. Refer to instructions

on page 9.

SYSTEM REQUIREMENTS

Clearances

Allow sufficient space around the indoor and outdoor unit for

proper airflow circulation and servicing. Refer to Fig. 1 through

Fig. 5 for minimum required clearances,

Piping: Piping and insulation is field supplied,

PiDin_ Lengths

The minimum length between the indoor and outdoor units is 10 fl

(3 m). Refer to table 3 for the maximum lengths allowed.

Table 3 -Maximum Refrigerant Line Lengths

Unit Max Line Max Elevation (ID Max Elevation (OD

Size Length if(m) over OD) if(m) over OD) if(m)

18K 200 (61) 65 (19.8) 200 (61)

24K 200 (61) 65 (19.8) 200 (61)

3OK 200 (61) 65 (19.8) 200 (61)

36K 200 (61) 65 (19.8) 200 (61)

48K 200 (61) 65 (19.8) 200 (61)

6OK 200 (61) 65 (19.8) 200 (61)

Note:For lengths greater than 25 ft (7.6 m), refer to the Duct Free Long

Line Guide.

Pipe Sizes

Refer to table 4 for pipe sizes.

Table 4 - Pipe Sizes

PIPE SIZES (in)

Unit Size

18

24

30

36

48

60

Liquid Phase

3/8

3/8

3/8

3/8

3/8

3/8

Vapor

38HDR 38QRR

5/8 5/8

5/8 5/8

3/4 3/4

3/4 3/4

7/8 3/4

7/8 3/4

Note:On heat pumps, both lines need to be insulated using at least 1/2 inch

closed foam insulation.

Refriuerant Charge

The 38HDR and 38QRR units can be matched with multiple

outdoor units and thus additional charge might be required when

matched with the 40QAC or 40QAQ units.

Table 5-Additional Charge

Additional Charge lb. (kg.)

Unit Size 38HDR 38QRR

018 0.7 (0.32) 0.7 (0.32)

024 1.3 (0.59) 0.8 (0.36)

030 1.4 (0.64) 0

036 0.2 (0.1) 0.5 (0.23)

048 0.2 (0.1) 0

060 0.5 (0.23) 0

Note:The above additional charge is required amount for line lengths up to

25 ft (7.6 m). For line lengths exceeding 25 ft (7.6 m), additional charge will

be required. Refer to the Duct Free Splits Long Line Guide.

Metering Device

The 40QAC and 40QAQ units use an accurator or a TXV as

shown in Table 6.

Table 6- Accurator Sizes

Unit Size Cooling Only Heat Pumps

40QAC 40QAQ 38QRR

018 TVX 49 40

024 TVX 55 43

030 TVX 65 55

036 TVX 70 63

048 TVX 80 73

060 TVX TXV 80

NOTE: Pistons are supplied with either the indoor or outdoor units.

Power and Connecting Cables -Field Supplied

Power:

• The main power is supplied to both the indoor and outdoor

units.

• Consult local building codes, NEC (National Electric Code) or

CEC (Canadian Electric Code) for any special requirements.

• Use Table 7 for the electrical requirements for the outdoor units

and Table 8 for the indoor units to correctly size the cables and

disconnect switches.

Control Wiring

Thermostat wires should be used for control wiring between the

indoor and outdoor units. A two conductor cable is required for

the cooling only units and a seven conductor cable is required on

heat pumps, 18 AWG is recommended for any length up to 200 ft

(61.0 m).

User Interface - Finished Goods Accessory

Any of the following three thermostats can be used depending on

the type of system on hand and the desired features. Refer to Table

9to select the proper thermostat.

UNIT SIZE V-PH-Hz

Table 7-38HDR /QRR Electrical Requirements

38HDR

FUSE/HACR BKR

MIN CKT AMPS MIN CKT AMPS

AMPS

20

25

30

30

20

15

40

25

15

60

30

15

018 208/230-1-60 12.1 12.1

024 208/230-1-60 17.7 18.8

030 208/230-1-60 19.1 17.5

208/230-1-60 19.1 20.9

036 208/230 -3 -60 13.0 14.1

460-3 -60 7.9 7.9

208/230-1-60 26.4 34.6

048 208/230-3 -60 17.9 22.4

460-3 -60 8.4 10.0

208/230-1-60 34.5 34.5

060 208/230 -3 -60 21.5 23.6

460-3-60 10.6 10.6

40QAQ

38QRR

FUSE/HACR BKR AMPS

20

30

30

30

20

15

50

30

15

60

40

15

UNIT MCA MOCP

024 9.29 15.0

036 17.70 20.0

048 23.80 25.0

060 28.70 30.0

Table 9 - Thermostat Selection

Table 8 -40QAC /QAQ Electrical Requirements

VOLTAGE 40QAC

V-Ph-60 Hz MCA MOCP

208/230-1 0.63 15.0

208/230-1 1.60 15.0

208/230-1 2.00 15.0

208/230-1 3.30 15.0

Model Number

System Type

Cooling Only

53DFS250-FS

Cooling Only & HP

53DFS250-SL

7 Day Programmable

5+1 +1 Day Programmable

=

Remote Room Sensor _/

#_

Dry Contact Equipped _/ -

Cooling Only

53DFST2-NP

Operating Range

Ensure that the system operates within the application guidelines

shown in the following tables.

Cooling operating range:

Maximum

DB WB

°F (°C) °F (°C)

128

Outdoor Unit - -

(51.7)

95 71 57

Indoor Unit (35) (21.7) (13.9)

Heating operating range:

Outdoor Unit

Indoor Unit

Accessories

Maximum

DB WB

°F (°C) °F (°C)

75 67

(23.9) (19.4)

80 71

(26.7) (21.7)

Minimum

DB WB

°F (°C) °F (°C)

55

(12.8)

67

(19.4)

Minimum

DB WB

°F (°C) °F (°C)

-20

(-28.9)

55

(12.8)

An extensive list of field installed accessories is available for both

indoor and outdoor units. Identify what accessories, if any, are

required for the application at hand and consult the separate

installation instructions for the accessories. Some of the

accessories, especially on the indoor units, can be installed much

easier if planned ahead.

INSTALLATION

Complete Pro-installation Checks

1. Unpack Unit - Store the indoor and outdoor units in the

original packaging until it is moved to the final site for in-

stallation.

2. Inspect Shipment - Upon receipt of shipment, check the

indoor and outdoor units for damage. If there is any dana-

age, forward claim papers directly to the transportation

company. Manufacturer is not responsible for damage in-

curred in transit.

3. Inspect Parts Supplied With Units - Check all items

against parts list (see page 7). If any items are missing, noti-

fy your distributor or Carrier office. To prevent loss or

damage, leave all parts in original packages until installa-

tion.

Consider System Requirements

1. Consult local building codes and NEC for special installa-

tion requirements.

2. When deciding the location of the indoor and outdoor units,

ensure that the piping run does not exceed the allowed dis-

tances listed in Table 3.

3. Make sure the indoor and outdoor units are easily accessible

to electrical power.

4. Allow sufficient clearances for airflow, wiring, refrigerant

piping, and servicing the unit. See Fig.l through Fig. 5.

5. Condensate piping can be directed through the inside wall

to an approved drain or straight outside.

INSTALL INDOOR UNIT

Plan the installation carefully before you begin.

1. Select indoor unit location. If possible, place the unit adja-

cent to an outside wall if fresh air is required, and ensure

that the location allows for complete air distribution.

NOTE: If unit is not installed adjacent to an outside

wall and fresh air is required, a power ventilation kit ac-

cessory is available.

2. Remove the indoor unit from the carton and place it upside

down and perform the following steps:

a. Remove side panels by sliding forward, then away from

sides of the unit. See Fig. 9.

[4721

;3/16"

LOOSEN BOLTS AND SLIDE- "_3Js"_J

HOUNTIBG BRACKET THIS )[3_8

OIRECIION_TO RENOVE 4_2_i. _4314"

2I/8 ,4

'L'OE 'BE ,,ELT.',J //i/ F, ,,,B. --L,.

BIRECTION_TO REHOVE i _ [!611_ [253

/:\.,.,...oo<o.,

(LIQUID SIDE) /N,.E ,B,0...,BE,

_WPOBSIBE_//

R,EMOVABLE AIR FILTER _ _DRAINCONNECTION

A09525

Fig. 9-Removal of Mounting Brackets from Indoor Unit

b. Remove air filters from inlet grilles; then remove and

retain screws securing inlet grilles to indoor unit.

c. Remove inlet grilles from indoor unit by sliding for-

ward.

d. If a size 024 indoor unit is to be matched with a size

018 outdoor unit, switch the Molex plug on the motor.

The Molex plugs are labeled as 018 or 024.

e. Loosen hex bolts on the side of the unit and remove the

mounting brackets by sliding them out in direction

shown in Fig. 10. Allow approximately 3/8 inch space

between the bolt head and the unit as shown in Fig. 10.

INDOORUNIT

BO,T

_EAD BOLTS 3/8 IN.

(4, FACTORY SUPPLIED)

A09527

Fig. 10 - Installing Hex-Head Mounting Bolts

in Fan Coil Unit

f. If piping is going to be run from the right hand side,

open knock-out by removing the pre-split portion in

the rear of the right hand side panel with a saw or cutter

knife.

3.MountUnit- the installation location should have already

been identified taking into account the piping length, wiring

and piping,connections, and clearances.

a. Use mounting template, included inside box, to locate

mounting bolt holes, piping holes, electrical connec-

tions, and accessory outdoor intake, if used. See Fig. 11

and Fig. 12.

INDOORUNIT

_,._ BOLT

_EAD BOLTS 3/8 IN.

(4, FACTORY SUPPLIED)

Unit Size

O24

O36

O48

O6O

A

50-15/16

(129.4)

58-13/16

(149.4)

71-9/16

(181.8)

92

(233.7)

DIMENSIONS in. (cm)

B

46

(116.8)

53 -7/8

(136.8)

66-5/8

(169.2)

87

(221)

c

49-5/8

(126.0)

57-1/2

(146.1)

70-1/4

(178.4)

90-5/8

(230.2)

A09528

Fig. 11 - Fan Coil Unit Hanging Dimensions

TOP -

REAR,

,_ 4 1/4+ "®'-'(

B-MOUNT*

3-MOUNT1"

POSITION OF

--_"HANGING

BOLT

(3]8 IN. DIA.

HOLE)

Unit Size

O24

O36

O48

O6O

- Concealed mounting holes

- Exposed mounting holes.

DIMENSIONS in. (cm)

B C

46 49-5/8

(116.8) (126.0)

56 - 7/8 57-1/2

(136.8) (146.1)

66- 5/8 70-1/4

(169.2) (178.4)

87 90-5/8

(221) (230.2)

Fig. 12 - Mounting Included with Fan Coil Unit

A09046

NOTE: If fresh air is required, a n_ininmm of 3 inch (76.2 ram)

clearance is required in back of unit.

b. Mount hanging brackets on ceiling (see Fig. 13) for

either concealed or exposed bolt hanging position.

(CEILING)

CONCEALED MOUNT EXPOSED MOUNT

LAGSCREW _ ,_f CEILINGBOARD

___5/16" OR LESS

I I

I/_"'-_. SIDEPANEL(RIGHT)

__.1_

(WALL)

-:ADBOLT

HANGERBOLT _ _ CEILINGBOARD

HANGER_-_f

i I

BODY _ j

I

I/

(CEIUNG)

(WALL)

A09530

Fig. 13 - Mounting Hanging Brackets

10

Whenmountingbrackets,selectthepropertypeofhardwarefrom

theguidelinesbelow.SeeFig.14

PERSONALINJURY AND/OR EQUIPMENT

DAMAGEHAZARD

Failureto follow this caution may result in personal injury

and /or equipment damage.

Solid structure in ceiling MUST be used due to weight of the

unit.

Wooden Structure:

Install hanging bolts on a square wooden piece placed over beams.

Newly Built Concrete Slab:

Install hanging bolts with inserts, embedded bolts, etc.

Metal Structure:

Install hanging bolts utilizing an existing angle or by installing a

new support angle.

Previously Built Concrete Slab:

Install hanging bolts with expansion anchor.

REINFORCING

(SLIDE INSERT) BAR_

_EDDED

!I OODENil BEAM BO T

(EDGE SHARP

HANGING jlt BRACE INSERT)

BOLT (EMBEDDED BOLT

OF PIPING )

WOODEN STRUCTURE NEWLY BUILT CONCRETE SLAB

RANG, ORT ANC.OR

BOLT ANGLE BAR

METAL STRUCTURE PREVIOUSLY

BUILT CONCRETESLAB

Fig. 14 - Fan Coil Unit Mounting Methods

(hardware is field-supplied)

A09526

c. Drill holes for routing refrigerant lines, condensate line

and electrical and control connections.

d. Lift the unit into place, and fit the hex-head bolts on

sides of indoor unit into mounting slots of mounting

brackets. Ensure unit is mounted with a slight tilt to the

rear side for proper drainage.

e. Tighten indoor unit hex-head bolts securely.

INSTALL OUTDOOR UNIT

The outdoor units can be installed on the ground, on the roof, or

mounted on a wall.

NOTE: Install the unit so that the coil does not face into

prevailing winds. If this is not possible and constant wind winds

above 25 mph are expected, use accessory wind baffle. See

installation instructions provided with accessory kit. Wind baffles

should also be used on all units with accessory low ambient

temperature control.

Mounting on Ground

1. Mount unit on a solid level concrete pad.

2. If a heat pump is being installed, use a field- provided snow

stand or ice rack where prolonged subfreezing temperatures

or heavy snow occurs.

3. Position unit so water or ice from roof does not fall directly

onto unit.

4. On cooling only units, an accessory stacking kit can be used

when units are to be stacked. See installation instructions

provided with the accessory kit.

Mounting on Roof

PERSONAL INJURY AND/OR EQUIPMENT

DAMAGE HAZARD

Failure to follow this caution may result in personal injury

and /or equipment damage.

Be sure unit panels are securely in place prior to rigging.

1. Rig the unit. Keep the unit upright and lift using a sling.

Use cardboard or padding under the sling, and spreader bars

to prevent sling damage to the unit. See Fig 15. See Fig. 2

through Fig. 5 for center of gravity reference

2. Mount unit on a solid concrete pad or platform.

3. Isolate unit and piping from structure

4. If a heat pump is being installed, use a field- provided snow

stand or ice rack where prolonged subfreezing temperatures

or heavy snow occurs.

5. On cooling only units, an accessory stacking kit can be used

when units are to be stacked. See installation instructions

provided with accessory kit.

SUNG

SUNG PADDING

COMPRESSOR

END

CENTER OF

GRAVFY

Fig. 15 - Lifting []nit with Sling

A07396

Mounting Unit on Wall

The units can also be mounted on the wall using the accessory

mounting kit.

11

Complete Outdoor Refrigerant Piping Connec-

tions

Follow the following general guidelines:

1. Use refrigerant grade field - supplied tubing.

Refer to Table 4 for the correct line sizes.

2. Do not use less than 10 ft (93.05 m) of interconnecting

tubing.

[]NIT DAMAGE HAZARD

Failure to follow this caution may result in equipment

damage or improper operation.

If any section of pipe is buried, there nmst be a 6 in. (152.4

ram) vertical rise to the valve connections on the outdoor

unit. If more than the recommended length is buried,

refrigerant may nfigrate to cooler, buried section during

extended periods of system shutdown. This causes

refrigerant slugging and could possibly damage the

compressor at start-up.

When more than 80 fl (24.4 m) of interconnecting tubing is used,

consult the Duct-Free Split System Long Line Application Guide

for required accessories.

3. On cooling only units, insulate the liquid line. On heat

pumps, insulate both lines. A minimum of 1/2 inch foam

pipe insulation is recommended.

4. Run the refrigerant tubes as directly as possible and avoid

unnecessary turns and bends.

5. Suspend refrigerant tubes to avoid damage to insulation or

tubes so they do not transnfit vibration to the structure.

6. When passing refrigerant tubes through the wall, seal the

opening so rain and insects do not enter the structure. Leave

some slack in refrigerant tubes between structure and out-

door unit to absorb vibration.

NOTE: A fusible plug is located in unit suction line; do not cap

this plug. If local codes require additional safety devices, install as

directed.

Connection at Outdoor Unit

[]NIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

To prevent damage to unit or service valves observe the

following:

• A brazing shield MUST be used.

• Wrap service valves with wet cloth or use a heat sink

material.

1. Braze the connector tubes (field supplied for the 38HDR

units and factory supplied for the 38QRR units) to the inlet

of the factory supplied filter drier. If a cooling only unit is

being installed move to step 3 (see Fig. 8).

2. Remove the plastic cap from the liquid and suction service

valve on the 38QRR unit and assemble the heating piston

and piston cap supplied with the outdoor unit as shown in

Fig. 16.

I 1 SERVICE

VALVE

1]_ TEFLON SEAL

NOTE:TeflonSeal mustface toward the outdoor heat pumpunit.

A09538

Fig. 16 -AccuRater Metering Device at Service

Valve (Bypass Type Components),

Heat Pump Systems Only

NOTE: The Teflon seal on the piston should point towards the

liquid service valve.

The size of the factory supplied piston might have to

adjusted for long line applications (over 80 ft /24.4 m).

Refer to the Duct Free Long Line Application Guide

for additional information.

3. On 38HDR units, remove the plastic caps on the liquid and

suction service valves. Braze the completed filter drier as-

sembly (from Step 1) to the liquid service valve. On the

38QRR unit, connect the completed filter drier assembly

(from Step 1) to the piston cap.

4. Braze the field supplied line set to the filter drier assembly

and to the suction valve.

5. Insulate any exposed areas between the filter drier and the

liquid valve.

Complete Outdoor Power and Control Wiring

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal iniury or

death.

The unit cabinet must have an uninterrupted or unbroken

ground to nfininfize personal iniury if an electrical fault should

occur. The ground may consist of electrical wire or metal

conduit when installed in accordance with existing electrical

codes.

[]NIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

Unit failure as a result of operation on improper line voltage or

excessive phase imbalance constitutes abuse and may cause

damage to electrical components. Such operation could void

any applicable Carrier warranty.

12

ELECTRICALSHOCKHAZARD

Failure to follow this warning could result in personal injury or

death.

Before perfornfing service or maintenance, be sure indoor unit

main power switch is turned OFF and indoor blower has

stopped.

Lock out and tag switch with suitable warning label.

Power Wiring

1. Mount outdoor power disconnect. The unit is factory wired

for the voltage shown on the unit nameplate. The fused dis-

connect switch nmst be provided within sight of the unit,

readily accessible, but out of reach of children. Provisions

for locking the disconnect switch on the OFF (open) posi-

tion is advisable. The disconnect switch must comply with

NEC and local codes. Protect the unit and wiring using only

the recommended fuse/circuit breaker size. See Table 10..

2. Run power wiring from main box to disconnect per NEC

and local codes.

3. Run power wiring from the disconnect switch to outdoor

unit. Use only minimum 60°C copper conductors between

the disconnect switch and the unit for field power connec-

tion.

4. Route the field power wires through the conduit connection

opening in the unit side panel and connect in junction box

as shown in Fig 17. The unit and power wiring must be

grounded.

SINGLE-PHASE _ m =GROUNDLEADm _GROUNDINGLUG

I 7 2SE

THREE-PHASE

CONN TO

DISCONNECT

PER NEC

=GROUND LEAD

LEGEND

NEC -- National Electrical Code

-- Splice (field)

-- -- ' Field Wiring

-- Factory Widng

.-,/_ BLK

._.-- BLU

._._ YEL

_[_ GROUNDING LUG

THREE-PHASE UNIT

Fig. 17 -Line Power Connections

A08251

NOTE: Operating unit on improper line voltage constitutes

abuse and could affect Carrier warranty. DO NOT install unit

in a system where voltage may fluctuate above or below

permissible limits.

Control Wiring

The control circuit is 24 volts AC (mininmn_ 40VA) supplied from

the indoor unit.

1. Make sure you have enough control wires to cover the dis-

tance between the indoor and outdoor unit.

2. Route one end of the control wiring through the opening

provided in the unit side panel and connect to the control

ternfinal strip using either Fig. 18 for 38HDR units and Fig.

19 for 38QRR units.

COOLm BLU

COMMON (C)_BRN

FIELD SUPPLIED

T'STAT WIRE

24VAC SUPPLY

REQUIRED

42Z]

COMMON (C)_BLK ==''_

(W2)--WHT _

COOL (Y)--YEL _

24VAC (R)--RED _

REQUIRED

HEAT (O)--ORG _

(REV, VALVE) FIELD SUPPLIE

T'STAT WIRE

OUTDOORUNIT

-E]

-E]

-EZ]

OUTDOOR UNIT INDOOR UNIT

LOW VOLTAGE CONNECTIONS LOW VOLTAGE CONNECTIONS

24VAC SUPPLY

REQUIRED

INDOOR UNIT

A09603

Fig. 18 -38HDR Typical Control Circuit Connections

A09509

Fig. 19 -38QRR Typical Control Circuit Connections

NOTE: Use No. 18 AWG color-coded, insulated (35°C nfininmm) wire. If the distance between the indoor and outdoor unit is greater than

100 ft. (30.5 m), as measured along the control voltage wires, use No. 16 AWG color-coded wire to avoid excessive voltage drop.

13

ELECTRICAL DATA

38HDR

UNIT SIZE

018

024

030

036

048

060

V-PH-Hz

208/230-1-60

208/230-1-60

208/230-1-60

208/230-1-60

208/230-3-60

460-3-60

208/230-1-60

208/230-3-60

460-3-60

208/230-1-60

208/230-3-60

460-3-60

Table 10 - 38HDR Electrical Data

VOLTAGE RANGE* COMPRESSOR OUTDOOR FAN MOTOR

Min Max RLA LRA FLA NEC Hp kW Out

253 9.0 48.0 0.8 0.125 0.09

253 13.5 58.3 0.8 0.125 0.09

253 14.1 73.0 1.5 0.25 0.19

253 14.1 77.0 1.5 0.25 0.19

253 9.2 71.0 1.5 0.25 0.19

506 5.6 38.0 0.8 0.25 0.19

253 19.9 109.0 1.5 0.25 0.19

253 13.1 83.1 1.5 0.25 0.19

506 6.1 41.0 0.8 0.25 0.19

253 26.4 134.0 1.5 0.25 0.19

253 15.0 110.0 1.5 0.25 0.19

506 7.8 52.0 0.8 0.25 0.19

187

187

187

187

187

414

187

187

414

187

187

414

MIN CKT FUSE/HACR

AMPS BKR AMPS

12.1 20

17.7 25

19.1 30

19.1 30

13.0 20

7.9 15

26.4 40

17.9 25

8.9 15

34.5 60

21.5 30

10.6 15

38QRR

UNIT SIZE

018

024

030

036

048

060

V-PH-Hz

208/230-1-60

208/230-1-60

208/230-1-60

208/230-1-60

208/230-3-60

460-3-60

208/230-1-60

208/230-3-60

460-3-60

208/230-1-60

208/230-3-60

460-3-60

VOLTAGE

RANGE*

Min Max

187 253

187 253

187 253

187 253

187 253

414 506

187 253

187 253

414 506

187 253

187 253

414 506

Table 11 -38QRR Electrical Data

COMPRESSOR

RLA LRA

9.0 48.0

14.4 58.3

12.8 64.0

15.5 77.0

10.1 71.0

5.6 38.0

26.5 117.0

16.7 83.1

7.3 41.0

26.4 134.0

17.7 110.0

7.8 52.0

OUTDOOR FAN MOTOR MIN CKT

FLA NEC Hp kw Out AMPS

0.8 0.125 0.09 12.1

0.8 0.125 0.09 18.8

1.5 0.25 0.19 17.5

1.5 0.25 0.19 20.9

1.5 0.25 0.19 14.1

0.8 0.25 0.19 7.9

1.5 0.25 0.19 34.6

1.5 0.25 0.19 22.4

0.8 0.25 0.19 10.0

1.5 0.25 0.19 34.5

1.5 0.25 0.19 23.6

0.8 0.25 0.19 10.6

FUSE/HACR BKR

AMPS

2O

3O

3O

3O

2O

15

5O

3O

15

6O

4O

15

UNIT

40QAC024-3

40QAC036-3

40QAC048-3

40QAC060-3

40QAQ024-3

40QAQ036-3

40QAQ048-3

40QAQ060-3

VOLTAGE

V-Ph-60 Hz

208/230-1

208/230-1

208/230-1

208/230-1

208/230-1

208/230-1

208/230-1

208/230-1

Table 12 -40QAC/QAQ Electrical Data

VOLTAGE

RANGE* FAN HEATER POWER

FLA

MIN. MAX. kW FLA

187 253 0.50 -- --

187 253 1.30 -- --

187 253 1.60t --

187 253 2.60_ --

MCA

0.63

1.60

-- 2.00

-- 3.30

MOCP FLA

15.0 0.50

15.0 1.30

15.0 1.60

15.0 2.60

15.0 11.29

20.0 14.30

25.0 19.00

30.0 24.30

187 253 0.50 2.00

187 253 1.30 3.00

187 253 1.60t 4.00

187 253 2.60t 5.00

8.66 9.29

13.00 17.70

17.40 23.80

21.70 28.70

MINIMUM

WIRE SIZE

(AWG)

14

14

14

14

14

14

12

10

LEGEND

FLA - Full Load Amps

LRA - Locked Rotor Amps

MCA - Minimum Circuit Amps

RLA - Rated Load Amps

NOTES

*Permissible limits of the voltage range at which the unit will operate

satisfactorily

1- One fan is 1.1 amps, the second fan is 0.5 amps.

Two fans each operating at 1.3 amps.

14

SCHEMATIC - COOLING ONLY

IND)O { UNIT

2CS/2SO SO [_Rn-

,'LK--

ClSCON4ECT

>E_ NEC LU=

_LU

gLK k

THER"O,____T AT

PL2

)L2 --[LU X/_ WH T"--I

r'-SLk LJ _{: WHT 1I

DR FR2 I'L3 z HI _

FRI F¢ #L 8 ME

I J TH" I ! _( : I !E} <G !E) H [[!L}I -Lt YEL _/@fEL,,_ _:iL}I

I I .I." I "d6* _,<r,{<BR / I _

9L C3, O48, )r" _ "

?LJ _ 4HT --

t \ /:_> IFM?

8LK 230_' 048,0 C O['LY

_L_, ( N_)ENSATE I>JNP

A{;tE SORY _EPO'/E '_HEN

L_L_J TRAI _S i_ _CCE;SO Y IS U',E

_ NOTE ? --4HT_WHT

0_2 TBf TB PL[ S....!YE

WH

c_

PL2

-----t --

_ T_4

' ALTERN#TE T'STAT ,4/AIR

,WEE> F J['<TI _

,EE NTE

LEGEND NOTE5

{_} TER 4INAL CLARKE

0 TERt IN_L ,:JNMARKE }

• SPLICE

D TERHINAL sLeeK

FACTOR_ _II_INO

FIEL9 CO_:TROL WIRI_S

FIELd) PO,_ER WIr_I_(_

_ PRINTED CIRCUIT 80ARD

_CCESSO_Y OR OPTIONAL WIRIN6

AS_ '_[R SWEEP _OTOR

#JR 4EEP _IT;H

CAP CA >±CITOR

c_ CONTROL RELAY

[R DEFI@ T IELAY

EQUII .GN). E_UII :"El T POUiD

F>T FREEZE PROTECTI(N THE_MO TAT

F! FAN _ELAY

FU FUE

IFH INDO0_ FAN MOTO[

OL o _'ERLOAO

[CP PpI[ TE CI ICUIT OR#l}

PR 'UP DELAY _EL_

PL 'LUG

p ,lip MOTOR

P ,_P SliT )FF SW/TCH

<6SI)R S#FETY S_ITCH )ELAY RELAy

Tb TERMINAL BL(CK

T)R TI_E )ELAy RELAy

TR#% TRAN F'Rt ER

:_> I

-.] I

2. bI!E [[, ACCORDANCE_ITH ATION#L

ELECTRICALCOlE .E.C. AN[} LOCAL{:ODES.

3. TRAnSFORmERIS THERMALLYP_OTECTEt A_D

WILL RESET AUTOMATICALLY

IFM{S} ARE I_HERE_TLY THERmaLLYPROTECTEd.

S. USE COPPERCONDUCTOr,S ONLY.

_. WHENUSI_S THE_I_OSTATWITH AIR SWEEPFdNCTION:

¸YELLOWWIREFRO_ _3 TO BE CONNECTEDTO _SRI.

BL_¢I._ WIRE TO BE _I_;(:r)N_4ECTE_)FROM_SR_.

LEA/E ISLe'OKWIRE TIE W_>I_E[} TO YELLOWWIRE.

COMPONENT ARRANGEMENT

i iiiiii

E(;JIP (_N)

F]EL PO_E_

OI_CON_ECT PER NE¢

Fig. 20 -38HDR and 40QAC Cooling System Wiring Diagram

A09597

15

SCHEMATIC -HEATPUMP

LEGEND NOTES

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COMPONENT ARRANGEMENT

Fig. 21 -38QRR and 40QAQ Heat Pump System Wiring Diagram

A09598

16

Complete Indoor Piping

The piping to the indoor unit can be routed from the back, side and

top. If the unit is being piped from the top or the side see note

below.

1. On heat 400A0024 - 048, the cooling piston {indoor} is

shipped in the factory installed metering device with the in-

door unit. Use Table 6 to verify that you have the correct

piston size for the system being installed.

2. Run the line set and the control wiring from the outdoor to

the indoor unit through the hole in the wall. Keep the piping

general guidelines in mind.

3. Cut the liquid and suction line to the correct length using a

tube cutter.

4. Remove the flare nuts from the indoor piping connections.

Install them onto the liquid and suction lines and make flare

connections.

5. Apply a small amount of refrigerant oil to the flare connec-

tion and tubing.

6. Align the tubing with the refrigerant connections on the in-

door unit.

7. Tighten the flare nut and finish the installation using two

wrenches as shown in Fig. 22.

NOTE: When piping is being routed from the top or side, two

pipe adaptors are supplied with the unit. Flare the pipe

adaptors to the indoor unit connections and sweat the other

ends to the line set.

Connect Condensate Drain Line

Observe all local sanitary codes when installing condensate drains.

Refer to Fig. 23 for drain pipe connection from indoor unit.

1. Use hard polyvinyl chloride (PVC) pipe material with nom-

inal ID of 3/4 in. to connect at drain line. Use pipe insula-

tion 1/4 in. thick, such as Armaflex insulation, on exposed

piping inside the conditioned space.

2. To insure regular flow of condensate water, the drain pipe

should be pitched toward an open drain or sump at a down-

ward slope of at least 1/4 in. per ft.

3. If the drain piping is routed through the side of the unit, at-

tach a field fabricated piece of sheet metal to support the

drain pipe as shown in Fig. 23.

4. Attach drain pipe with nylon wire tie passing through hole

as shown in Fig. 23.

WIRE TIE

KNOCKOUT {REAR PIPING)

HOLE DRAIN PIPING

REAR EXIT

HOLE FOR RIGHT

PIPING

,_._ DRAIN PIPING

DRAIN PIPING PLATE (F_eldFabrtcaed)

A07354

Fig. 22 -Tighten Flare Nut

8. Insulate both connections on the 38QRR and the liquid line

connection on the 38HDR units.

RIGHT- HAND EXIT

A09534

Fig. 23 -Routing Drain Piping

NOTE: Do not fasten nylon wire ties tight enough to deform the

insulation, as this affects performance.

5. Install an external trap at the end of the condensate line.

NOTE: Should the installation require one, a condensate pump

may be ordered as a fields-installed accessory. It is easier to install

pump before hanging the unit.

17

Complete Control Wiring

1. Run the control wiring close to the ternfinal block on the

indoor unit.

2. Connect the wires as shown in Fig 18 and Fig. 20 for

38HDR units, and Fig. 19 and Fig. 21 for 38QRR units.

Complete Power Connection To Indoor Unit

Be sure field wiring complies with local building codes and NEC,

and unit voltage is within linfits shown in Table 12.

Contact local power company for correction of improper line

voltage.

ELECTRICALSHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before installing, modifying, or servicing system, main

electrical disconnect switch nmst be in the OFF position.

There may be more than 1 disconnect switch. Lock out and

tag switch with a suitaMe warning label.

[]NIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

Unit failure as a result of operation on improper line voltage or

excessive phase imbalance constitutes abuse and may cause

damage to electrical components. Such operation could void

any applicable Carrier warranty.

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

unit.

NOTE: Install branch circuit disconnect of adequate size to handle

unit starting current per NEC. Locate disconnect within sight of,

and readily accessible from, unit, per section 440-14 of NEC.

Some codes allow indoor unit to share disconnect with outdoor

unit if disconnect can be locked; check local code before installing

in this manner.

1. Route ground and power wires.

ELECTRICALSHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

According to NEC and most local codes, the unit must have

an uninterrupted, unbroken ground to nfininfize personal

iniury if an electric fault should occur. The ground may

consist of electrical wire or metal conduit when installed in

accordance with existing electrical codes.

2. Route line power leads from inside disconnect to the fan

coil. Place wire through the whole on the control box.

3. Connect wire to high voltage ternfinal board (TBI) and

ground screw.

NOTE: When routing the wire in the unit, use care to keep the

wire away from refrigerant and condensate piping and any

sharp edges.

NOTE: The 208/230-v units are factory wired for 230-v to

24-v transformer operation, For 208-v to 24-v operation,

interchange the blue (208-v) and red (230-v) wires. Cap any

unused wires with wire nuts.

Install Thermostat

These

list of

1.

2,

3,

systems use a three speed thermostat. Refer to Table 9 for a

recommended thermostats.

Mount thermostat to a wall in the occupied space using

hardware provided with the thermostat. Locate the thermo-

stat, preferably on an interior wall, in an area that is not sub-

jected to drafts or direct sunlight through windows.

Run the thermostat wires to the control box of the indoor

unit. If running the thermostat through the back of the unit,

3/8 in. space between the unit and the wall is required.

Route wires over refrigerant and drain piping as shown in

Fig. 24.

_ REFRIGERANTPIPING

*Field-supplied.

A09533

Fig. 24 - Routing Wires Over Piping

NOTE: Do not route wires under the piping, or wires could

impede air filter removal.

4. Connect the thermostat wires to the indoor unit per Fig 25

for a 40QAC unit and Fig. 26 for a 40QAQ unit.

18

THERHOSTAT

FT-

FT

H_-

FT

FT

HP ONLY

f

COOLING ONLY--_ _

TB2

D

D

r_q

E0

D

D

rfq

Fig. 25 -Thermostat Wire Connection for 40QAC

A09545

Reassemble Indoor Unit

1. Reinstall filters and inlet grilles

2. Reinstall the side panels

START-UP

Preliminary Checks

1. Check condensate drainage system; on the opposite side of

the drain connection, insert awater bottle up into the fan

coil unit and fill the drain pan (see Fig. 27). Water must

flow steadily; if not, check the pipe slope or inspect for any

pipe restrictions.

LOUVERS

Fig. 27 - Inserting Water Into Drain Pan

A09538

2. Make sure all wiring connections are correct and they are

tight.

3. Field electrical power source must agree with unit name

plate rating.

4. Check that all barriers, covers, and panels are in place. En-

sure that the filters and return-air grilles on the indoor unit

have been installed and that the discharge louvers are posi-

tioned correctly.

5. All service valves must be closed.

6. On units with crankcase heaters, ensure belly-band heaters

are tight around the compressor.

THERMOSTAT

m

E

E

B-

E

IT

EI

J

r

r J

I

T82

[]

m

[]

Fig. 26 - Thermostat Wire Connection for 40QAQ

Evacuate and Dehydrate the System

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

Never use the system compressor as a vacuum pump.

Using Vacuum Pump

1. Completely tighten flare nuts A, B, C, D, connect manifold

gage charge hose to a charge port of the low side service

valve. (See Fig. 28.)

2. Connect charge hose to vacuum pump.

3. Fully open the low side of manifold gage. (See Fig. 29.)

4. Start vacuum pump

5. Evacuate using either deep vacuum or triple evacuation

method.

6. After evacuation is complete, fully close the low side of

manifold gage and stop operation of vacuum pump.

7. The factory charge contained in the outdoor unit is good for

up to 25 ft. (8 m) of line length. For refrigerant lines longer

than 25 ft (8 m), add 0.3 oz. per foot of extra piping up to

the maximum allowable length.

8. Disconnect charge hose from charge connection of the low

side service valve.

9. Fully open service valves B and A.

10. Securely tighten caps of service valves.

Outdoor Unit Refrigerant

_B Low Side

High Side

Service Valve

Indoor Unit

A07360

Fig. 28 -Service Valve

19

Manifold Gage

500 microns "

Low side valve _Z.)

Charge hose-_

High side valve

/Charge hose

Vacuum pump

Low side valve

A07361

Fig. 29 - Manifold

Deep Vacuum Method

The deep vacuum method requires a vacuum pump capable of

pulling a vacuum of 500 microns and a vacuum gage capable of

accurately measuring this vacuum depth. The deep vacuum method

is the most

liquid water.

o

_ositive way of assuring a system is free of air and

See Fig. 30)

LEAK IN

SYSTEM

VACUUM TIGHT

TOO WET

TIGHT

DRY SYSTEM

1234567

MINUTES

Fig. 30 -Deep Vacuum Graph

A95424

Triple Evacuation Method

The triple evacuation method should only be used when vacuum

pump is only capable of pumping down to 28 in. of mercury

vacuum and system does not contain any liquid water.

Refer to Fig. 31 and proceed as follows:

1. Pump system down to 28 in. of mercury and allow pump to

continue operating for an additional 15 minutes.

2. Close service valves and shut off vacuum pump.

3. Connect a nitrogen cylinder and regulator to system and

open until system pressure is 2 psig.

4. Close service valve and allow system to stand for 1 hr. Dur-

ing this time, dry nitrogen will be able to diffuse throughout

the system absorbing moisture.

5. Repeat this procedure as indicated in Fig. 31. System will

then be free of any contaminants and water vapor.

IEVACUATEI

IBREAK VACUUM WITH DRY NITROGEN I

[28!3

IEVACUATEI

IBREAK VACUUM WITH DRY NITROGEN I

IEvACuATEI

ICHECKFORT,GHTOR¥SYSTEMI

(IF IT HOLDS DEEP VACUUM)

I RELEASEC,ARGE,NTOSYSTE I

A95425

Fig. 31 - Triple Evacuation Method

To Start the Unit:

1. If the outdoor unit is equipped with a crankcase heater, turn

on the indoor and outdoor disconnect switches to supply

power the system 12 hours before starting the system.

2. Release charge into the system by opening (back-seating)

liquid and suction line service valves.

3. Set the wireless remote control or wired remote control be-

low ambient temperature. Operate the unit for 15 minutes.

4. Refer to Table 5 to determine if additional charge is re-

quired. Also, if you have a long line application, refer to the

Duct Free Long Line Application Guide to determine the

additional charge that is required beyond 25 ft (7.6 m).

5. Calculate the total additional charge required and weigh in.

6. Charge should be added as liquid (not gas) slowly and care-

fully to low side to avoid liquid slugging.

20

OPERATING SEQUENCE

Ceiling-suspended fan coil units have a relay board which controls

system operation in response to a room thermostat. The user may

manually select any one of 3 fan speeds for unit operation. The

discharge louvers on the unit can be stationary or swing

continuously. A switch located at the bottom of the unit will turn

the swing flmction on and off.

Ceiling-suspended systems may be equipped with an accessory

power ventilation kit and/or condensate pump.

FAN OPERATION -- Fan coils are capable of 3-speed

operation. See thermostat instructions for fan speed selection.

When the fan(s) is operating in medium or high speed and the unit

is equipped with the power ventilation kit, the ventilation fan will

operate to provide fresh air.

COOLING MODE OPERATION -- When the room thermostat

senses a demand for cooling, the fan coil relay board is energized.

The indoor fan(s) will start in the selected speed (if it is not already

operating). The reversing valve (heat pump only) will energize for

cooling operation.

The internal condensate pump (if so equipped) runs whenever the

reversing valve is energized (heat pump only) and/or the unit is in

cooling. As long as the condensate float switch and freeze

protection thermostat are closed, the cooling relays in the fan coil

unit will close. This energizes the compressor and outdoor fan in

the outdoor unit.

The compressor will continue to operate until the room thermostat

is satisfied. When the cooling demand is satisfied, the compressor

and outdoor fan will stop. If the system is in the AUTO. position,

the indoor fan will stop with the compressor.

If the unit has the accessory ventilation kit, the ventilation fan will

operate whenever the indoor fan is set for medium or high speed.

HEAT PUMP OPERATION -- When the room thermostat

senses a demand for heating the indoor fan will start in the selected

speed (if not already operating), and the reversing valve will not be

energized.

The internal condensate pump (if supplied) and freeze protection

thermostat are not operated during heating operation. The control

relay (CR2) closes, and the compressor and outdoor fan are

energized through the defrost board (DFB), which is located in the

outdoor unit. The microprocessor logic in the DFB is energized

when the compressor starts, and the defrost timer runs. Once every

90 minutes (factory default setting) of compressor run time, the

DFB logic checks the defrost thermostat (DFT). If the DFT is

open, the unit continues in heating operation. If the DFT is closed,

the DFB switches the unit to defrost mode. The timing on the DFB

may be set at either 30, 50, or 90 minutes.

DEFROST (Heat Pump Only) -- The DFB energizes the RVS

(reversing valve solenoid), and the reversing valve switches to the

cooling position. The K1 relay on the DFB opens and the outdoor

fan stops. The W2 contact on the DFB is also energized, which in

turn energizes the defrost relay on the fan coil relay board, turns off

the electric heater and stops the indoor fan.

The DFB logic checks the 10-minute defrost timer and the DFT. If

the DFT opens in less than 10 nfinutes, the DFB switches the unit

back to normal heating operation. If the DFT remains closed, the

DFB switches the unit back to heating operation after 10 minutes.

When the DFB changes back to heating mode, the RVR (reversing

valve relay) is de-energized and the reversing valve switches back

to heating operation. Both the outdoor and indoor fans come back

on, and if necessary, the electric heater also turns on. SYSTEM

SAFETIES -- The system is equipped with the following safety

devices to protect system components: Indoor coil freeze

protection thermostat -- If a coil temperature of 28 °F (-2.22 ° C) or

lower is sensed, the compressor and outdoor fan will be shut down

until the coil temperature exceeds 28°F (-2.22°C). The indoor fan

will continue to run. Condensate float switch (units equipped with

accessory condensate pump, cooling cycle only) -- If the level of

condensate in the drain pan rises too high, the condensate float

switch will turn the system off.

CLEANING AND MAINTENANCE

ELECTRICALSHOCK HAZARD

Failure to follow this warning could result in personal

injury or death.

Before installing, modifying, or servicing system, main

electrical disconnect switch must be in the OFF

position. There may be more than 1 disconnect switch.

Lock out and tag switch with a suitable warning label.

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment

damage or improper operation.

To avoid shrinkage, do not wash filter in water over

120°F (48.9°C). To avoid damage, do not expose filter to

fire or direct sunlight . Clean the filter more frequently

when air is extremely dirty.

For proper system operation, perform the cleaning and

maintenance operations in Table 13.

Lubrication -- The indoor-fan, automatic air sweep, and the

outdoor-fan motors are factory lubricated and require no oiling.

AIR FILTERS

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment

damage or improper operation.

Operating the system with dirty air filters may damage the

indoor unit and can cause reduced cooling performance,

intermittent system operation, frost build-up on the indoor

coil, and blown fuses. Inspect and clean or replace the air

filters monthly.

REMOVE AIR FILTERS -- Remove filters by pulling them

straight out.

CLEAN OR REPLACE FILTERS -- Filters can be vacuumed

or washed in warm water. Shake filter to remove any excess water,

and replace by sliding filter behind grille until filter snaps in place.

Refer to Fig. 32. If the filter has begun to break down or is torn,

replace it. Replacement filters are available through your dealer.

21

TASK

INDOOR UNIT

Clean Air Filters X

Clean Drain Pipe

Clean Condensate Drain Pan

Clean Indoor Coil

Clean Indoor Unit Front Panel

OUTDOOR UNIT

Clean the Fins From Outside

Open the Unit and Clean Fins Inside

Remove Dust From Electrical Parts

Check Electrical Connections are Tight

Clean Outdoor Fan

Clean Outdoor Coil

Check that Outdoor Fan Assembly is Tight

Clean Drain Pan

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

Table 13 - Cleaning and Maintenance Schedule

MONTHLY QUARTERLY YEARLY

X

X

X

X

X

X

X

X

X

X

X

X

CLEAN INDOOR UNIT BOTTOM PANEL -- If the bottom

panel of the unit becomes dirty or smudged, wipe the outside of the

panel with a soft dry cloth. Use a mild liquid detergent and wipe

off carefully with a dry cloth.

CLEAN INDOOR COIL -- To clean the coil, remove indoor

unit bottom panel and vacuum the coil fins, using care not to bend

or damage fins.

CLEAN OUTDOOR COIL (Outdoor []nit)

CUT HAZARD

Failure to follow this caution may result in personal iniury.

Sheet metal parts may have sharp edges or burrs. Use care and

wear appropriate protective clothing and gloves when

cleaning. Clean coil carefully.

To clean the outdoor coil:

1. Remove any dirt or obstruction from discharge opening.

2. Use a garden hose to spray water on the coil. Debris that

collects between coil fins inhibits heat transfer -- direct the

water spray between coil fins to flush out debris.

CLEAN CONDENSATE DRAINS -- Clean all drains and drain

pans at the start of each cooling season. Check the flow by pouring

water into the drain.

To clean or replace drain pan:

1. Place a plastic sheet on the floor to catch any water that may

spill from drain pan.

2. Remove the intake grille and distribution assembly (at-

tached).

3. Remove the condensate water in the drain pan by letting

water drain into a 3-gallon bucket.

[]NIT DAMAGE HAZARD

SERVICE

ELECTRICALSHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before servicing system, main electrical disconnect switch

must be in the OFF position. There may be more than 1

disconnect switch. Lock out and tag switch with a suitable

warning label.

ENVIRONMENTAL HAZARD

Failure to follow this caution may result in environmental

damage.

Federal regulations require that you do not vent refrigerant to

the atmosphere. Recover during system repair or final unit

disposal.

A. REMOVE FILTERS

INTAKE

GRILLE B. WASH FILTERS, (((" "_

OR

Failure to follow this caution may result in equipment

damage,

Do not use a screwdriver to pry drain pan out of assembly

- it could damage the pan.

4. Remove the 4 screws holding the drain pan.

5. Carefully hold the drain pan to remove it from the assembly.

C. VACUUM FILTERS

Fig. 32 - Cleaning Filters

A09539

22

Before Calling for Service

Save the cost of a service call by doing the following:

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

2. Press Mode button until OFF is displayed. Wait 5 minutes.

3. Press Mode button until either COOL or HEAT is displayed

(as desired).

4. Adjust thermostat set point to desired room temperature. If

system starts within a few minutes, service may not be ne-

cessary. If system does not operate properly, check Table 14

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 for field

installation of fresh air ventilation. Plan the installation carefully.

Before beginning, measure carefully and follow acceptable

building practices, NEC, and local codes.

Ventilation-Air Accessory -- Refer to ventilation air accessory

installation instructions.

TROUBLESHOOTING

If the under-ceiling fan coil unit fails to start or operate properly, sometimes the problem is minor and can be handled without a service call.

Refer to Table 14 for some common problems, causes, and typical solutions. See Fig. 36 and 37 for additional system troubleshooting details.

If the problem cannot be corrected, contact a local dealer for further assistance.

Table 14 - Troubleshooting

PROBLEM

System Does Not Start.

System Does Not Cool Properly.

System Does not Heat Properly.

Ice or frost has Formed on Indoor

Coil J-

Insufficient Airflow.

CAUSE

Blown fuse or circuit breaker tripped at building power

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 selected temperat-

ure.

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

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 be replaced.

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 be replaced.

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

Fan coil unit coil is blocked.

TYPICAL SOLUTION

Replace fuse or reset circuit breaker.*

Turn on disconnect switch(as).

Cancel mode using Day/Night button on thermostat.

Restore power.

Press Mode button on thermostat until thermostat dis-

plays 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 using the

thermostat.

Remove obstruction.

Adjust fan speed to high or auto. using the Fan button

on the thermostat.

Clean or replace air filter(s).

Reset temperature to desired comfort setting using the

thermostat.

Remove obstruction.

Adjust fan speed to high or auto. using the Fan button

on the thermostat.

Check manual defrost timer setting and adjust as ne-

cessary.

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.

When outdoor temperature is approximately 55°F (12.8°C) or below, indoor coil frosting may occur when system is operated in cooling or maximum

dehumidification mode. Units are not intended to operate below 55°F (12.8°C) without appropriate accessories.

23

I

--[CONTAOTO ENJ

-"-t DEFECTIVE LOW- I

VOLTAGE

TRANSFORMER

_1 CONTACTOR I

COIL OPEN OR

SHORTED

_1 OPEN INDOOR ITHERMOSTAT

_-t LIQUID-LINE I

PRESSURE

SWITCH OPEN

_-_ LOSS OF CHARGE

_{ OPEN CONTROLCIRCUIT

t

COMPRESSOR

WILL NOT RUN

II

NTAOTOR1CLOSED

_t COMPRESSOR I

POWER SUPPLY

OPEN

_-t LOOSE LEAD'S AT I

COMPRESSOR

GEAR 11PHI

I

NO HEATING OR I

I

INSUFFICIENT

HEATING

I

I

COMPRESSOR J

RUNS BUT

CYCLES ON

INTERNAL

OVERLOAD

---[ DIRTY FILTERS ]OR INDOOR COIL

._ INDOOR FAN DEFECTIVE FAN

STOPPED OR MOTOR

CYCLING ON CAPACITOR

OVERLOAD

_ DAMAGED ]

REVERSING LOOSE LEADS AT

VALVE FAN MOTOR

_-[ RESTRICTION IN FAN MOTORDISCHARGE LINE BURNED OUT

[

ILOWSOCT'ONILOW HEAD

iISTOPPED

_.____.._1

_1 LOOSE LEADS AT I

OUTDOOR FAN

MOTOR

_1 INTERNAL I

FAN MOTOR

OVERLOAD

OPEN

I

COMPRESSOR I

RUNS

INSUFFICIENT

HEATING

I

1

OUT RFANIRUNNING

--[ REVERSING IVALVE STUCK

--[ RESTRICTED ILIQUID LINE

I

-1 STR'PHEATE_INOT OPERATING

fOUTDOOR

THERMOSTAT

DEFECTIVE

______J

ODT SET-rING

TOO LOW

CAP TUBE

PINCHED OR

BULB NOT

SENSING TRUE

_1 COMPRESSOR ISTUCK

___ COMPRESSOR ]

INTERNAL

OVERLOAD OPEN

___OPEN'SHORTED' I

OR GROUNDED

COMPRESSOR

MOTOR

WINDINGS

_l DEFECTIVE RUN ICAPACITOR

"_1 OVERCHARGE I

OR NON-

CONDENSABLES

IN SYSTEM

LOW

REFRIGERANT

CHARGE

_--I LINE VOLTAGE

TOO HIGH OR

LOW

----I DEFECTIVE RUN I

CAPACITOR

(1-PH)

_1 COMPRESSOR I

BEARINGS

FAULTY

_1 HIGH-LOAD ICONDITION

"_1 REVERSING I

VALVE JAMMED

IN MIDPOSmON

_t HIGH I

SUPERHEAT

_1 FAN MOTOR IBURNED OUT

.__ DEFROST RELAY

NC

CONTACTS OPEN

ON CIRCUIT

BOARD

I FAN MOTOR

CONTACTS

WELDED CLOSED

IN DEFROST

RELAY

I REVERSING

VALVE DID NOT

SHIFT

I UNITNOT t'-

PROPERLY

CHARGED

__{ ACCURATER®

PISTON

IRESTRICTED

OR CLOGGED

_1 UNDER- ICHARGED

"'t OUTDOOR COIL IDIRTY

_1 STRAINER IRESTRICTED

_1 OUTDOOR COIL ]

HEAVILY

FROSTED

I

DEFECTIVE I -'_

DEFROST

THERMOSTAT

OUTDOOR TEMP

I_1 STRIP HEATER

RELAY OR

CONTACTOR

DEFECTIVE

OPENING IN 1

POWER CIRCUIT

TO HEATER

ELEMENTS

BROKEN FUSE

LINK

t BROKEN HEATER ]ELEMENT

__l OPENOVER- l

TEMPERATURE

THERMOSTAT

DEFECTIVE ROOM 1

THERMOSTAT

(2ND STAGE')

DEFROST ]

THERMOSTAT IN

POOR PHYSICAL

CONTACT WITH

TUBE

DEFECTIVE ICIRCUIT BOARD

BAD ELECTRICAL

CONNECTION

DEFROST CIRCUIT

ANYWHEREIN

LEGEND

NC -- Normally Closed

ODT -- Outdoor Thermostat

NOTE: For systems with indoor units equipped with microprocessor

control, see separate controls, service, and troubleshooting manual.

Fig. 33 -Troubleshooting the Heating Cycle

A07435

24

[

I COMPRESSOR i

WILL NOT RUN

I

[ ]

_{ DEFECTIVE

LOW-VOLTAGE

TRANSFORMER

--_ OPENTHERMOSTAT

_{i OPEN CONTROL ]CIRCUIT

_-[ LOSS OF CHARGE ]

_[_ LOOSE

ELECTRICAL

CONNECTION

g COMPRESSOR ]

POWER SUPPLY

OPEN

_ LOOSE LEADS AT ]COMPRESSOR

FAULTY START

GEAR (!-PH)

_[ OPEN, SHORTED,

OR GROUNDED

COMPRESSOR

MOTOR

WINDINGS

q COMPRESSORSTUCK

__ COMPRESSOR

INTERNAL

PROTECTION

OPEN

--_ DEFECTIVE RUN ]CARAC_OR

NO COOLING OR ]

INSUFFICIENT

COOUNG

I

t

COMPRESSOR

RUNS BUT

CYCLES ON

INTERNAL

OVERLOAD

OUTDOOR FAN _L

STOPPED OR

CYCUNGON

OVERLOAD

_[ OUTDOOR AIR 1

RESTRICTED OR

RECIRCULATING

DAMAGED OR

STUCK

REVERSING

VALVE

_{ RESTRICTEDDISCHARGE TUBE

--_ LOOSE LEAD AT IFAN MOTOR

_ DEFROST RELAYS i

NC CONTACTS

OPEN

_[ MOTORDEFECTIVE

_{INOORRECT OFM ]CAPACITOR

£

LOW SUCTION 1PRESSURE

_-[ DIRTY AIR

FILTERS

-_ DUCTRESTRICTED

--_ DAMPERS }

PARTLY CLOSED

l

COMPRESSOR

RUNS BUT

INSUFFICIENT

COOLING

l HIGH SUCTION

LOW HEAD

PRESSURE

__[

__{ REVERSING

VALVE HUNG UP

OR INTERNAL

LEAK

DEFECTIVE

COMPRESSOR

VALVES

1

I HIGHSOCT'ON1LOW SUPERHEAT

__]

[_ UNIT

OVERCHARGED 1

1 iNCORRECT 1

ACCURATER

PISTON

iNTERNAL 1

PRESSURE

RELIEF OPEN

___ OVERCHARGE

OR NON-

CONDENSABLES

IN SYSTEM

LOW

REFRIGERANT

CHARGE

_{_ LINE VOLTAGE

TOO HIGH OR

LOW

__{ DEFECTIVE

DEFPOST

THERMOSTAT

DEFECTIVE RUN t

CAPAC_OR

,_ COMPRESSOR ]

BEARINGS

=¢ULTY

INDOOR COIL ]FROSTED

LIQUID LINE 1

SLIGHTLY

RESTRICTED

ACCURATER®

RESTRICTED

_[ INCORRECT I

ACCURATER

PISTON

__ INDOOR COIL _

STRAINER

RESTRICTED

LEGEND

NC -- Normally Closed

ODT -- Outdoor Thermostat

NOTE: For systems with indoor units equipped with microprocessor

control, see separate controls, service, and troubleshooting manual.

INDOOR BLOWER l

MOTOR

DEFECTIVE OR

CYCLING ON

OVERLOAD

Fig. 34 - Troubleshooting the Cooling Cycle

A07436

25

Copyright 2009 Carrier Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 10/09

Manufacturer reserves the right to change, at any time, specification8 and design8 without notice and without obligations,

2d

Catalog No: 40QAC-Q-2SI

Replaces: 40QAC- Q- lSl