Carrier Ceiling Suspended Duct Free Split System 40Qac Users Manual Q 1SI

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40QAC / 38HDR

40QAQ / 38QRR

Ceiling---Suspended Duct Free Split System

Sizes 018 to 060

Installation Instructions

the environmentally sound refrigerant

40QAC, QAQ Unit

38HDR, QRR Unit

NOTE: Read the entire instruction manual before starting the

installation.

!WARNING

UNIT 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.

!WARNING

ELECTRICAL SHOCK 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.

CAUTION

!

2

DIMENSIONS -- INDOOR

NOTES:

1. Dimensions in [ ] are in millimeters.

2. Direction of airflow.

3. Standard unit clearances are as follows:

• 0 in. on top and rear

• 3in.onleftside

• 12 in. on right side

• 36 in.on bottom

(When facing unit discharge.)

A08580

UNIT

SIZE

WEIGHT (lb) A B E F G

Cooling

Only

Heat

Pump f t --- i n . mm f t --- i n . mm f t --- i n . mm f t --- i n . mm f t --- i n . mm

024 108 110 4 --- 2 15/16 1294 3 --- 1 0 1169 4 --- 1 5/81260 — — 1 --- 9 5/8549

036 117 119 4 --- 1 0 13/16 1493 4 --- 5 7/81368 4 --- 9 1/21459 — — 2 --- 1 1/2648

048 149 151 5 --- 1 1 9/16 1817 5 --- 6 5/81692 5 --- 1 0 1/41783 1 --- 9 7/8555 3 --- 3 1/16 992

060 179 181 7 --- 8 2336 7 --- 3 2211 7 --- 6 5/82302 1 --- 1 1 5/8601 4 --- 1 1 9/16 1512

Fig. 1 -- 40QA Dimensions

40QAC/38HDR -- 40QAQ/38QR

R

3

4 3/16"

H

G

L

A

B

J

N

P

E

FD

7 1/2" 2 1/2"

1"

8"

4 1/2"

1 7/16"

11/16"

C

K

N

UNIT SERIES ELECTRICAL

CHARACTERISTICS AB C D E F G H J KLMNP

OPERATING

WEIGHT(lbs)

SHIPPING

WEIGHT(lbs)

SHIPPING

DIMENSIONS (L x W x H)

38HDR018 1 X O O O 25 1/8" 36 15/16" 14 9/16" 16" 23 7/16" 17 3/16" 17 1/8" 22" 13" 6 5/8" 11 1/4" 5/8" 2 15/16" 6" 155 171 42 9/10" X 18" X 28 1/10"

38HDR024 1,2 X O O O 31 1/8" 36 15/16" 14 9/16" 16" 23 7/16" 17 3/16" 23 1/8" 28" 14" 6 3/4" 11 5/8" 5/8" 2 15/16" 6" 180 198 42 9/10" X 18" X 34 1/10"

38HDR030 1 X O O O 37 3/16" 44 9/16" 17 1/16" 18 7/16" 30 1/2" 19 5/8" 29 3/16" 34 1/16" 13 11/16" 8 1/8" 15 7/8" 3/4" 3 7/16" 6 1/2" 200 223 50 1/2" X 20 1/2" X 40 2/10"

38HDR036 1 X O X X 37 3/16" 44 9/16" 17 1/16" 18 7/16" 30 1/2" 19 5/8" 29 3/16" 34 1/16" 13 11/16" 8 1/8" 15 7/8" 3/4" 3 7/16" 6 1/2" 218 240 50 1/2" X 20 1/2" X 40 2/10"

38HDR048 1,2 X O X X 43 3/16" 44 9/16" 17 1/16" 18 7/16" 30 1/2" 19 5/8" 35 3/16" 40 1/16" 14 1/2" 8 1/2" 18 7/8" 7/8" 3 7/16" 6 1/2" 284 309 50 1/2" X 20 1/2" X 46 2/10"

38HDR060 1,2 X O X X 43 3/16" 44 9/16" 17 1/16" 18 7/16" 30 1/2" 19 5/8" 35 3/16" 40 1/16" 14 1/2" 8 1/2" 18 7/8" 7/8" 3 7/16" 6 1/2" 294 319 50 1/2" X 20 1/2" X 46 2/10"

UNIT SIZE

MINIMUM

MOUNTING PAD

DIMENSIONS

18,24 23" X 42"

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

208-230-1-60

230-1-60

208/230-3-60

460-3-60

1 1/2"

FIELD CONTROL SUPPLY

WIRE ENTRY

7/8" HOLE W/GROMMET

1. REQUIRED 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.

2. MINIMUM OUTDOOR OPERATING AMBIENT IN COOLING

MODE IS 55 F, MAX. 125 F.

3. SERIES DESIGNATION IS THE 13TH POSITION OF THE

UNIT MODEL NUMBER.

4. CENTER OF GRAVITY

5. ALL DIMENSIONS ARE IN "INCHES" UNLESS NOTED.

FIELD POWER SUPPLY CONN.

HOLE SIZES PROVIDED:

7/8"-1/2"TRADE

1 3/16"-3/4"TRADE

1 3/8"-1"TRADE

3/8" LIQUID LINE

FEMALE SWEAT CONN.

X = YES

O = NO

FEMALE SWEAT CONN.

VAPOR LINE CONN.

M

JUNCTION BOX FOR

POWER SUPLLY AND

CONTROL CONNECTIONS

AIR

AIR

Fig. 2 -- 38HDR Outdoor Unit Dimensions -- English

40QAC/38HDR -- 40QAQ/38QRR

4

106.4

17.5

H

G

L

A

B

J

K

N

P

E

FDC

190.5 63.5

25.4

203.2

38.1

114.3

36.5

UNIT SERIES ELECTRICAL

CHARACTERISTICS AB C D E F G H J KLMNP

OPERATING

WEIGHT(KG)

SHIPPING

WEIGHT(KG)

SHIPPING

DIMENSIONS (L x W x H)

38HDR018 1 X O O O 638.2 938.2 369.9 406.4 595.3 436.6 435.0 558.8 330.2 168.3 285.8 15.9 74.6 152.4 70.4 77.7 1090.2 X 457.7 X 714.3

38HDR024 1,2 X O O O 790.6 938.2 369.9 406.4 595.3 436.6 587.4 711.2 355.6 171.5 295.3 15.9 74.6 152.4 81.8 90.0 1090.2 X 457.7 X 866.7

38HDR030 1 X O O O 944.6 1131.9 433.4 468.3 774.7 498.5 741.4 865.2 347.7 206.4 403.2 19.0 87.3 165.1 90.9 101.4 1282.7 X 520.7 X 1020.7

38HDR036 1 X O X X 944.6 1131.9 433.4 468.3 774.7 498.5 741.4 865.2 347.7 206.4 403.2 19.0 87.3 165.1 99.0 109.0 1282.7 X 520.7 X 1020.7

38HDR048 1,2 X O X X 1097.0 1131.9 433.4 468.3 774.7 498.5 893.8 1017.6 368.3 215.9 479.4 22.2 87.3 165.1 129.0 140.4 1282.7 X 520.7 X 1173.1

38HDR060 1,2 X O X X 1097.0 1131.9 433.4 468.3 774.7 498.5 893.8 1017.6 368.3 215.9 479.4 22.2 87.3 165.1 133.6 145.0 1282.7 X 520.7 X 1173.1

UNIT SIZE

MINIMUM

MOUNTING PAD

DIMENSIONS

18,24 584.2 X 1066.8

30,36,48,60 609.6 X 1270.0

208-230-1-60

230-1-60

208/230-3-60

460-3-60

FIELD CONTROL SUPPLY

WIRE ENTRY

22.22 HOLE W/GROMMET

FIELD POWER SUPPLY CONN.

HOLE SIZES PROVIDED:

22.22 - 12.70 TRADE

30.16 - 19.05 TRADE

34.92 - 25.40 TRADE

9.53 LIQUID LINE

FEMALE SWEAT CONN.

X = YES

O = NO

1. REQUIRED CLEARANCES: WITH COIL FACING WALL; ALLOW 152.4 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.

2. MINIMUM OUTDOOR OPERATING AMBIENT IN COOLING

MODE IS 12.8 C, MAX. 51.7 C.

3. SERIES DESIGNATION IS THE 13TH POSITION OF THE

UNIT MODEL NUMBER.

4. CENTER OF GRAVITY

5. ALL DIMENSIONS ARE IN "MM" UNLESS NOTED.

FEMALE SWEAT CONN.

VAPOR LINE CONN.

M

JUNCTION BOX FOR

POWER SUPLLY AND

CONTROL CONNECTIONS

AIR

AIR

Fig. 3 -- 38HDR Outdoor Unit Dimensions -- SI

40QAC/38HDR -- 40QAQ/38QRR

5

4 3/16"

11/16"

J

K

N

P

E

FDC

7 1/2" 2 1/2"

UNIT SERIES ELECTRICAL

CHARACTERISTICS AB C D E F G H J KLMNP

OPERATING

WEIGHT(lbs)

SHIPPING

WEIGHT(lbs)

SHIPPING

DIMENSIONS (L x W x H)

38QRR018 0 X O O O 25 1/8" 36 15/16" 14 9/16" 16" 23 7/16" 17 3/16" 17 1/8" 22" 13" 6 5/8" 11 1/4" 5/8" 2 15/16" 6" 167 183 42 9/10" X 18" X 28 1/10"

38QRR024 0 X O O O 31 1/8" 36 15/16" 14 9/16" 16" 23 7/16" 17 3/16" 23 1/8" 28" 14" 6 3/4" 11 5/8" 5/8" 2 15/16" 6" 176 194 42 9/10" X 18" X 34 1/10"

38QRR030 0 X O O O 37 3/16" 44 9/16" 17 1/16" 18 7/16" 30 1/2" 19 5/8" 29 3/16" 34 1/16" 13 11/16" 8 1/8" 15 7/8" 3/4" 3 7/16" 6 1/2" 187 210 50 1/2" X 20 1/2" X 40 2/10"

38QRR036 0 X O X X 37 3/16" 44 9/16" 17 1/16" 18 7/16" 30 1/2" 19 5/8" 29 3/16" 34 1/16" 13 11/16" 8 1/8" 15 7/8" 3/4" 3 7/16" 6 1/2" 232 255 50 1/2" X 20 1/2" X 40 2/10"

38QRR048 0 X O X X 43 3/16" 44 9/16" 17 1/16" 18 7/16" 30 1/2" 19 5/8" 35 3/16" 40 1/16" 14 1/2" 8 1/2" 18 7/8" 7/8" 3 7/16" 6 1/2" 278 303 50 1/2" X 20 1/2" X 46 2/10"

38QRR060 0 X O X X 43 3/16" 44 9/16" 17 1/16" 18 7/16" 30 1/2" 19 5/8" 35 3/16" 40 1/16" 14 1/2" 8 1/2" 18 7/8" 7/8" 3 7/16" 6 1/2" 306 331 50 1/2" X 20 1/2" X 46 2/10"

UNIT SIZE

MINIMUM

MOUNTING PAD

DIMENSIONS

18,24 23" X 42"

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

208-230-1-60

230-1-60

208/230-3-60

460-3-60

1. REQUIRED 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.

2. MINIMUM OUTDOOR OPERATING AMBIENT IN COOLING

MODE IS 55 F, MAX. 125 F.

3. SERIES DESIGNATION IS THE 13TH POSITION OF THE

UNIT MODEL NUMBER.

4. CENTER OF GRAVITY

5. ALL DIMENSIONS ARE IN "INCHES" UNLESS NOTED.

X = YES

O = NO

AIR

AIR

A

B

3/8" LIQUID LINE

MALE FLARE CONN.

FEMALE SWEAT CONN.

VAPOR LINE CONN.

M

H

G

L

1"

8"

4 1/2"

1 7/16"

1 1/2"

FIELD CONTROL SUPPLY

WIRE ENTRY

7/8" HOLE W/GROMMET

FIELD POWER SUPPLY CONN.

HOLE SIZES PROVIDED:

7/8"-1/2"TRADE

1 3/16"-3/4"TRADE

1 3/8"-1"TRADE

JUNCTION BOX FOR

POWER SUPLLY AND

CONTROL CONNECTIONS

Fig. 4 -- 38QRR Outdoor Unit Dimensions -- English

40QAC/38HDR -- 40QAQ/38QRR

6

106.4

17.5

J

K

N

P

E

FDC

190.5 63.5

N

UNIT SERIES ELECTRICAL

CHARACTERISTICS AB C D E F G H J KLMNP

OPERATING

WEIGHT(KG)

SHIPPING

WEIGHT(KG)

SHIPPING

DIMENSIONS (L x W x H)

38QRR018 0 X O O O 638.2 938.2 369.9 406.4 595.3 436.6 435.0 558.8 330.2 168.3 285.8 15.9 74.6 152.4 75.9 83.2 1090.2 X 457.7 X 714.3

38QRR024 0 X O O O 790.6 938.2 369.9 406.4 595.3 436.6 587.4 711.2 355.6 171.5 295.3 15.9 74.6 152.4 80.0 88.2 1090.2 X 457.7 X 866.7

38QRR030 0 X O O O 944.6 1131.9 433.4 468.3 774.7 498.5 741.4 865.2 347.7 206.4 403.2 19.0 87.3 165.1 85.0 95.4 1282.7 X 520.7 X 1020.7

38QRR036 0 X O X X 944.6 1131.9 433.4 468.3 774.7 498.5 741.4 865.2 347.7 206.4 403.2 19.0 87.3 165.1 105.4 115.9 1282.7 X 520.7 X 1020.7

38QRR048 0 X O X X 1097.0 1131.9 433.4 468.3 774.7 498.5 893.8 1017.6 368.3 215.9 479.4 22.2 87.3 165.1 126.4 137.7 1282.7 X 520.7 X 1173.1

38QRR060 0 X O X X 1097.0 1131.9 433.4 468.3 774.7 498.5 893.8 1017.6 368.3 215.9 479.4 22.2 87.3 165.1 139.0 150.4 1282.7 X 520.7 X 1173.1

UNIT SIZE

MINIMUM

MOUNTING PAD

DIMENSIONS

18,24 584.2 X 1066.8

30,36,48,60 609.6 X 1270.0

208-230-1-60

230-1-60

208/230-3-60

460-3-60

X = YES

O = NO

1. REQUIRED CLEARANCES: WITH COIL FACING WALL; ALLOW 152.4 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.

2. MINIMUM OUTDOOR OPERATING AMBIENT IN COOLING

MODE IS 12.8 C, MAX. 51.7 C.

3. SERIES DESIGNATION IS THE 13TH POSITION OF THE

UNIT MODEL NUMBER.

4. CENTER OF GRAVITY

5. ALL DIMENSIONS ARE IN "MM" UNLESS NOTED.

AIR

AIR

A

B

9.53 LIQUID LINE

MALE FLARE CONN.

FEMALE SWEAT CONN.

VAPOR LINE CONN.

MH

G

L

25.4

203.2

38.1

114.3

36.5

FIELD CONTROL SUPPLY

WIRE ENTRY

22.22 HOLE W/GROMMET

FIELD POWER SUPPLY CONN.

HOLE SIZES PROVIDED:

22.22 - 12.70 TRADE

30.16 - 19.05 TRADE

34.92 - 25.40 TRADE

JUNCTION BOX FOR

POWER SUPLLY AND

CONTROL CONNECTIONS

Fig. 5 -- 38QRR Outdoor Unit Dimensions -- SI

40QAC/38HDR -- 40QAQ/38QRR

7

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 1 – Installation Materials

Part No. Name of Part Qty.

1Side Panels 2

2Hex Head Bolts 4

3Mounting Bracket 2

4Pistons 1

5Installation Template 1

6Adapter Tubes 2

A09532

Fig. 6 -- Hanging Fan Coil Unit

Outdoor Unit

The following items are included with the outdoor unit:

A09536

Fig. 7 -- 38HDR018--036

A09537

Fig. 8 -- 38QRR018--036

Model Filter Drier Piston

Cap Pistons Flare

Connector

38HDR n--- --- ---

38QRR n n n n

Table 2 – Matched Systems

System

Ty p e

Nominal

Capacity Outdoor Unit Indoor Unit

Cooling

018 3 8 H D R 0 1 8 --- --- --- 3 4 0 Q AC 0 2 4 --- --- --- 3

*

024 3 8 H D R 0 2 4 --- --- --- 3 4 0 Q AC 0 2 4 --- --- --- 3

030 3 8 H D R 0 3 0 --- --- --- 3 4 0 Q AC 0 3 6 --- --- --- 3

036 38HDR036--- --- ---3/5/6 4 0 Q AC 0 3 6 --- --- --- 3

048 38HDR048--- --- ---3/5/6 4 0 Q AC 0 4 8 --- --- --- 3

060 38HDR060--- --- ---3/5/6 4 0 Q AC 0 6 0 --- --- --- 3

Heat Pumps

Heat Pumps

018 3 8 Q R R0 1 8 --- --- --- 3 4 0 Q AQ 0 2 4 --- --- --- 3

024 3 8 Q R R0 2 4 --- --- --- 3 4 0 Q AQ 0 2 4 --- --- --- 3

030 3 8 Q R R0 3 0 --- --- --- 3 4 0 Q AQ 0 3 6 --- --- --- 3

036 38QRR036--- --- ---3/5/6 4 0 QA Q0 3 6 --- --- --- 3

048 38QRR048--- --- ---3/5/6 4 0 QA Q0 4 8 --- --- --- 3

060 38QRR060--- --- ---3/5/6 4 0 QA Q0 6 0 --- --- --- 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.

Piping Lengths

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

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

Table 3 – Maximum Refrigerant Line Lengths

Unit

Size

Max Line

Length ft(m)

Max Elevation (ID

over OD) ft(m)

Max Elevation (OD

over OD) ft(m)

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

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

30K 200 (61) 65 (19.8) 200 (61)

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

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

60K 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.

Table4–PipeSizes

PIPE SIZES (in)

Unit Size Liquid Phase Vapor

38HDR 38QRR

18 3/8 5/8 5/8

24 3/8 5/8 5/8

30 3/8 3/4 3/4

36 3/8 3/4 3/4

48 3/8 7/8 3/4

60 3/8 7/8 3/4

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

closed foam insulation.

40QAC/38HDR -- 40QAQ/38QR

R

8

Refrigerant 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:

SThe main power is supplied to both the indoor and outdoor

units.

SConsult local building codes, NEC (National Electric Code) or

CEC (Canadian Electric Code) for any special requirements.

SUse 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

9 to select the proper thermostat.

Table 7 – 38HDR / QRR Electrical Requirements

UNIT SIZE V --- P H --- H z

38HDR 38QRR

MIN CKT AMPS FUSE/HACR BKR

AMPS MIN CKT AMPS FUSE/HACR BKR AMPS

018 208/230---1---60 12.1 20 12.1 20

024 208/230---1---60 17.7 25 18.8 30

030 208/230---1---60 19.1 30 17.5 30

036

208/230---1---60 19.1 30 20.9 30

208/230---3---60 13.0 20 14.1 20

4 6 0 --- 3 --- 6 0 7.9 15 7.9 15

048

208/230---1---60 26.4 40 34.6 50

208/230---3---60 17.9 25 22.4 30

4 6 0 --- 3 --- 6 0 8.4 15 10.0 15

060

208/230---1---60 34.5 60 34.5 60

208/230---3---60 21.5 30 23.6 40

4 6 0 --- 3 --- 6 0 10.6 15 10.6 15

Table 8 – 40QAC / QAQ Electrical Requirements

UNIT VOLTAGE

V --- P h --- 6 0 H z

40QAC 40QAQ

MCA MOCP MCA MOCP

024 208/230---1 0.63 15.0 9.29 15.0

036 208/230---1 1.60 15.0 17.70 20.0

048 208/230---1 2.00 15.0 23.80 25.0

060 208/230---1 3.30 15.0 28.70 30.0

Table 9 – Thermostat Selection

Model Number

System Type

Cooling Only & HP

53DFS250 --- SL

Cooling Only

53DFS250 --- FS

Cooling Only

53DFST2 --- NP

Features

7 Day Programmable √√---

5+1+1 Day Programmable --- --- √

Remote Room Sensor √ √

Dry Contact Equipped √√---

40QAC/38HDR -- 40QAQ/38QR

R

9

Operating Range

Ensure that the system operates within the application guidelines

shown in the following tables.

Cooling operating range:

Maximum Minimum

DB

_F(_C)

WB

_F(_C)

DB

_F(_C)

WB

_F(_C)

Outdoor Unit 125

(51.7) --- 55

(12.8) ---

Indoor Unit 95

(35)

71

(21.7)

67

(19.4)

57

(13.9)

Heating operating range:

Maximum Minimum

DB

_F(_C)

WB

_F(_C)

DB

_F(_C)

WB

_F(_C)

Outdoor Unit 75

(23.9)

67

(19.4)

--- 2 0

(---28.9) ---

Indoor Unit 80

(26.7)

71

(21.7)

55

(12.8) ---

Accessories

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 Pre--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 dam-

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.1 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.

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.

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.

40QAC/38HDR -- 40QAQ/38QR

R

10

3. Mount Unit -- 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.

Unit Size DIMENSIONS in. (cm)

A B C

024 50---15/16

(129.4)

46

(116.8)

49---5/8

(126.0)

036 58---13/16

(149.4)

53---7/8

(136.8)

57---1/2

(146.1)

048 71---9/16

(181.8)

66---5/8

(169.2)

70---1/4

(178.4)

060 92

(233.7)

87

(221)

90---5/8

(230.2)

A09528

Fig. 11 -- Fan Coil Unit Hanging Dimensions

Unit Size DIMENSIONS in. (cm)

B C

024 46

(116.8)

49---5/8

(126.0)

036 53---7/8

(136.8)

57---1/2

(146.1)

048 66---5/8

(169.2)

70---1/4

(178.4)

060 87

(221)

90---5/8

(230.2)

* --- Concealed mounting holes

{--- E x po se d m o u n ti n g h o l e s.

A09046

Fig. 12 -- Mounting Included with Fan Coil Unit

NOTE: If fresh air is required, a minimum of 3 inch (76.2 mm)

clearance is required in back of unit.

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

either concealed or exposed bolt hanging position.

A09530

Fig. 13 -- Mounting Hanging Brackets

40QAC/38HDR -- 40QAQ/38QR

R

11

When mounting brackets, select the proper type of hardware from

the guidelines below. See Fig. 14

PERSONAL INJURY AND/OR EQUIPMENT

DAMAGE HAZARD

Failure to 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.

CAUTION

!

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.

A09526

Fig. 14 -- Fan Coil Unit Mounting Methods

(hardware is field--supplied)

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.

CAUTION

!

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.

A07396

Fig. 15 -- Lifting Unit with Sling

Mounting Unit on Wall

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

mounting kit.

40QAC/38HDR -- 40QAQ/38QR

R

12

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.

CAUTION

!

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment

damage or improper operation.

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

mm) vertical rise to the valve connections on the outdoor

unit. If more than the recommended length is buried,

refrigerant may migrate 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 ft (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 transmit 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

CAUTION

!

UNIT 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:

SA brazing shield MUST be used.

SWrap 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.

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

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

andtothesuctionvalve.

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

liquid valve.

Complete Outdoor Power and Control Wiring

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or

death.

The unit cabinet must have an uninterrupted or unbroken

ground to minimize personal injury if an electrical fault should

occur. The ground may consist of electrical wire or metal

conduit when installed in accordance with existing electrical

codes.

CAUTION

!

UNIT 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.

40QAC/38HDR -- 40QAQ/38QR

R

13

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or

death.

Before performing 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 must 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.

BLK

BLK

SINGLE-PHASE UNIT

GROUNDING LUG

SINGLE-PHASE

CONN TO

DISCONNECT

PER NEC

BLK

BLU

YEL

GROUNDING LUG

THREE-PHASE

CONN TO

DISCONNECT

PER NEC

THREE-PHASE UNIT

GROUND LEAD

GROUND LEAD

LEGEND

NEC -- National Electrical Code

-- Splice (field)

Field Wiring

Factory Wiring

A08251

Fig. 17 -- Line Power Connections

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 (minimum 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

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

19 for 38QRR units.

Y1

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 minimum) 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.

40QAC/38HDR -- 40QAQ/38QR

R

14

ELECTRICAL DATA

Table 10 – 38HDR Electrical Data

38HDR

UNIT SIZE V --- P H --- H z VOLTAGE RANGE* COMPRESSOR OUTDOOR FAN MOTOR MIN CKT

AMPS

FUSE/HACR

BKR AMPS

Min Max RLA LRA FLA NEC Hp kW Out

018 208/230---1---60 187 253 9.0 48.0 0.8 0.125 0.09 12.1 20

024 208/230---1---60 187 253 13.5 58.3 0.8 0.125 0.09 17.7 25

030 208/230---1---60 187 253 14.1 73.0 1.5 0.25 0.19 19.1 30

036

208/230---1---60 187 253 14.1 77.0 1.5 0.25 0.19 19.1 30

208/230---3---60 187 253 9.2 71.0 1.5 0.25 0.19 13.0 20

4 6 0 --- 3 --- 6 0 414 506 5.6 38.0 0.8 0.25 0.19 7.9 15

048

208/230---1---60 187 253 19.9 109.0 1.5 0.25 0.19 26.4 40

208/230---3---60 187 253 13.1 83.1 1.5 0.25 0.19 17.9 25

4 6 0 --- 3 --- 6 0 414 506 6.1 41.0 0.8 0.25 0.19 8.9 15

060

208/230---1---60 187 253 26.4 134.0 1.5 0.25 0.19 34.5 60

208/230---3---60 187 253 15.0 110.0 1.5 0.25 0.19 21.5 30

4 6 0 --- 3 --- 6 0 414 506 7.8 52.0 0.8 0.25 0.19 10.6 15

Table 11 – 38QRR Electrical Data

38QRR

UNIT SIZE V --- P H --- H z

VOLTAGE

RANGE* COMPRESSOR OUTDOOR FAN MOTOR MIN CKT

AMPS

FUSE/HACR BKR

AMPS

RLA LRA FLA NEC Hp kw Out

Min Max

018 208/230---1---60 187 253 9.0 48.0 0.8 0.125 0.09 12.1 20

024 208/230---1---60 187 253 14.4 58.3 0.8 0.125 0.09 18.8 30

030 208/230---1---60 187 253 12.8 64.0 1.5 0.25 0.19 17.5 30

036

208/230---1---60 187 253 15.5 77.0 1.5 0.25 0.19 20.9 30

208/230---3---60 187 253 10.1 71.0 1.5 0.25 0.19 14.1 20

4 6 0 --- 3 --- 6 0 414 506 5.6 38.0 0.8 0.25 0.19 7.9 15

048

208/230---1---60 187 253 26.5 117.0 1.5 0.25 0.19 34.6 50

208/230---3---60 187 253 16.7 83.1 1.5 0.25 0.19 22.4 30

4 6 0 --- 3 --- 6 0 414 506 7.3 41.0 0.8 0.25 0.19 10.0 15

060

208/230---1---60 187 253 26.4 134.0 1.5 0.25 0.19 34.5 60

208/230---3---60 187 253 17.7 110.0 1.5 0.25 0.19 23.6 40

4 6 0 --- 3 --- 6 0 414 506 7.8 52.0 0.8 0.25 0.19 10.6 15

Table 12 – 40QAC/QAQ Electrical Data

UNIT VOLTAGE

V --- P h --- 6 0 H z

VOLTAGE

RANGE* FAN

FLA

HEATER POWER MINIMUM

WIRE SIZE

(AWG)

MIN. MAX. kW FLA MCA MOCP FLA

40QAC024 --- 3 208/230---1 187 253 0.50 — — 0.63 15.0 0.50 14

40QAC036 --- 3 208/230---1 187 253 1.30 — — 1.60 15.0 1.30 14

40QAC048 --- 3 208/230---1 187 253 1.60{— — 2.00 15.0 1.60 14

40QAC060 --- 3 208/230---1 187 253 2.60}— — 3.30 15.0 2.60 14

40QAQ024 --- 3 208/230---1 187 253 0.50 2.00 8.66 9.29 15.0 11.29 14

40QAQ036 --- 3 208/230---1 187 253 1.30 3.00 13.00 17.70 20.0 14.30 14

40QAQ048 --- 3 208/230---1 187 253 1.60{4.00 17.40 23.80 25.0 19.00 12

40QAQ060 --- 3 208/230---1 187 253 2.60{5.00 21.70 28.70 30.0 24.30 10

LEGEND

FLA --- F u l l L o a d A m p s

LRA --- L o c k e d R o to r A m ps

MCA --- Minimum Circuit Amps

RLA --- RatedLoadAmps

NOTES

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

satisfactorily

{Onefanis1.1amps,thesecondfanis0.5amps.

}Two fans each operating at 1.3 amps.

40QAC/38HDR -- 40QAQ/38QR

R

15

A09597

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

40QAC/38HDR -- 40QAQ/38QR

R

16

A09598

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

40QAC/38HDR -- 40QAQ/38QR

R

17

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 40QAQ024 – 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.

A07354

Fig. 22 -- Tighten Flare Nut

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

connection on the 38HDR units.

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.

(Field Fabricated)

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.

40QAC/38HDR -- 40QAQ/38QR

R

18

Complete Control Wiring

1. Run the control wiring close to the terminal 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 limits shown in Table 12.

Contact local power company for correction of improper line

voltage.

!WARNING

ELECTRICAL SHOCK 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.

CAUTION

!

UNIT 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.

!WARNING

ELECTRICAL SHOCK 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 minimize personal

injury 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 terminal board (TB1) 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 systems use a three speed thermostat. Refer to Table 9 for a

list of recommended thermostats.

1. 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.

2. 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.

3. Route wires over refrigerant and drain piping as shown in

Fig. 24.

*

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.

40QAC/38HDR -- 40QAQ/38QR

R

19

HP ONLY

COOLING ONLY

A09545

Fig. 25 -- Thermostat Wire Connection for 40QAC

Heating Only

Fig. 26 -- Thermostat Wire Connection for 40QAQ

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 a water 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.

A09538

Fig. 27 -- Inserting Water Into Drain Pan

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.

Evacuate and Dehydrate the System

CAUTION

!

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 Indoor Uni

t

Refrigerant

Service Valve

Low Side

High Side

A

B

C

D

A07360

Fig. 28 -- Service Valve

40QAC/38HDR -- 40QAQ/38QR

R

20

Manifold Gage

500 microns

Low side valve

High side valve

Charge hose

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 positive way of assuring a system is free of air and

liquid water. (See Fig. 30)

500

MINUTES

01234567

1000

1500

LEAK IN

SYSTEM

VACUUM TIGHT

TOO WET

TIGHT

DRY SYSTEM

2000

MICRONS

2500

3000

3500

4000

4500

5000

A95424

Fig. 30 -- Deep Vacuum Graph

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.

CHECK FOR TIGHT, DRY SYSTEM

(IF IT HOLDS DEEP VACUUM)

EVACUATE

BREAK VACUUM WITH DRY NITROGEN

WAIT

EVACUATE

RELEASE CHARGE INTO SYSTEM

BREAK VACUUM WITH DRY NITROGEN

EVACUATE

WAIT

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.

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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 function 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 minutes, 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

!WARNING

ELECTRICAL SHOCK 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.

CAUTION

!

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

CAUTION

!

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.

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Table 13 – Cleaning and Maintenance Schedule

TASK MONTHLY QUARTERLY YEARLY

INDOOR UNIT

Clean Air Filters X

Clean Drain Pipe X

Clean Condensate Drain Pan X

Clean Indoor Coil X

Clean Indoor Unit Front Panel X

OUTDOOR UNIT

Clean the Fins From Outside X

Open the Unit and Clean Fins Inside X

Remove Dust From Electrical Parts X

Check Electrical Connections are Tight X

Clean Outdoor Fan X

Clean Outdoor Coil X

Check that Outdoor Fan Assembly is Tight X

Clean Drain Pan X

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

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 Unit)

CUT HAZARD

Failure to follow this caution may result in personal injury.

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

wear appropriate protective clothing and gloves when

cleaning. Clean coil carefully.

CAUTION

!

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.

CAUTION

!

UNIT DAMAGE HAZARD

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.

SERVICE

!WARNING

ELECTRICAL SHOCK 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.

CAUTION

!

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.

A09539

Fig. 32 -- Cleaning Filters

40QAC/38HDR -- 40QAQ/38QR

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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:

Sunit ON/OFF switch is in ON position

Sfuse 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 CAUSE TYPICAL SOLUTION

System Does Not Start.

Blown fuse or circuit breaker tripped at building power

entry. Replacefuseorresetcircuitbreaker.*

Indoor and/or outdoor unit disconnect switch is off. Turn on disconnect switch(es).

Thermostat is set to night mode. Cancel mode using Day/Night button on thermostat.

Power failure. Restore power.

Unit is in off mode. Press Mode button on thermostat until thermostat dis-

plays the desired unit mode.

Three---minute time delay is running. Wait for 3 minutes.

Temperature is above or below the selected temperat-

ure. Select new temperature using the thermostat.

System Does Not Cool Properly.

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

Temperatu r e is set to o h igh o r too low. Reset temperature to desired comfort setting using the

thermostat.

Outdoor unit outdoor coil restricted. Remove obstruction.

Fan speed is set too low. Adjust fan speed to high or auto. using the Fan button

on the thermostat.

System Does not Heat Properly.

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

Temperatu r e is set to o h igh o r too low. Reset temperature to desired comfort setting using the

thermostat.

Outdoor unit outdoor coil restricted. Remove obstruction.

Fan speed is set too low. Adjust fan speed to high or auto. using the Fan button

on the thermostat.

Outdoor unit outdoor coil is frosted up. Check manual defrost timer setting and adjust as ne-

cessary.

Ice or frost has Formed on Indoor

Coil.{

Low outdoor---air temperature. Runsysteminfan---onlymodeuntilfrostisgone.

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

Insufficient Airflow. Air filter(s) in indoor unit is dirty or needs to be replaced. Clean or replace air filter(s).

Fan coil unit coil is blocked. 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.

40QAC/38HDR -- 40QAQ/38QR

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LEGEND

NOTE: For systems with indoor units equipped with microprocessor

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

NC — Normally Closed

ODT — Outdoor Thermostat

A07435

Fig. 33 -- Troubleshooting the Heating Cycle

40QAC/38HDR -- 40QAQ/38QR

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LEGEND

NOTE: For systems with indoor units equipped with microprocessor

control, see se

p

arate controls, service, and troubleshootin

g

manual.

NC — Normally Closed

ODT — Outdoor Thermostat

A07436

Fig. 34 -- Troubleshooting the Cooling Cycle

40QAC/38HDR -- 40QAQ/38QR

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Copyright 2009 Carrier Corp. S7310 W. Morris St. SIndianapolis, IN 46231 Printed in U.S.A. Edition Date: 10/09

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

C a t a l o g N o : 4 0 Q A C --- Q --- 2 S I

R e p l a c e s : 4 0 Q A C --- Q --- 1 S I

40QAC/38HDR -- 40QAQ/38QR

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