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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Installation Instructions
SAFETY
Improper

installation,

CONSIDERATIONS

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
packaged with the kits or accessories when installing.
40QAC,

QAQ

instructions

Follow all safety codes. Wear safety glasses, protective
clothing,
and work gloves. Use quenching
cloth for brazing
operations.

[]nit

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
When

safety

you

see

information.

This is the safety-alert

this symbol

the

unit

symbol

and in instructions

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
practices

injury
which

or death. CAUTION
is used to identify unsafe
would result in minor personal injury or product

and property
damage.
NOTE is used
which will result in enhanced installation,

38HDR,
NOTE:
Read
installation.

the entire

QRR

instruction

ELECTRICALSHOCK

[]nit
manual

before

starting

the

Failure to follow
injury or death.

to highlight
suggestions
reliability, or operation.

HAZARD

this warning

could

result

Before installing, modifying,
or servicing
electrical
disconnect
switch
must be

in personal

system,
in the

position. There may be more than 1 disconnect
Lock out and tag switch with a suitable warning

[]NIT

OPERATION

AND SAFETY

main
OFF

switch.
label.

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.

PERSONAL
HAZARD

INJURY

AND

Failure to follow this caution
and / or equipment damage.
DO NOT
removed.

operate

the

unit

EQUIPMENT

may result

without

DAMAGE

in personal

a filter

or with

injury

grille

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.)

[254]
"-4"
[102]

O" 2 11116"
[881
.......

[214_
REAR

VIEW

---

0"-10"

I _ -%2_Y'31

[19O]
.....
0"-77/[B'_

HIGH
0'-1

[

[t_'T_,_

VOLTAGE KNOCKOUT
5/8"

_0'-1

[42]

I--°-

BOX
;
-----I CONTROL
..........................................................................................

G-

[102]

)

{

F___]__I
0"_-5

11
[

I 0"-4"

'4*

11116"
[42]

I/8"

[130]

)I
_/

CONDENSATEPUNPA3[SE
UIR\\
........
AoLR EY.F:A2E.
\
/ o.8.O,
ON,
(20"

MAX.

LIFT)

0"-3

5/8"

LOW VOLTAGE TO OUTDOOR UNIT

_
0'-4
_-_

_;:I
7/8"

_\\-_-_--L::F::;RANT

]I
L_
____

AND THERMOSTAT

pIp IN° CONN . (VAPOR SIDE)

_8;_?LE
PLARE (018, 024)
3/4"MALE
FLARE(036,048,OEO)
_O3/_NNpAIPING
CONN, (3/4. HALE

/
_

POWER
B

NFT)

VENTILATION

ACCESSORY

DUCT RING

[131]

-- REVERSE BRACKETS FOR

OPT IONAL CONCEALED MOUNTING
(4)MOUNTING
BOLT HOLES

POWER VENTILATION ACCESSORY
MINIMUM 0'-3 _ [763 CLEARANCE
REOUIRED IN BACK OF UNIT

V--_-

-1/2

X 1 LONG

0'-1

1/4"

TOP POWER-'/

ENTRANCE KNOCKOU]

_0'-2
[69]

[I72]
_-,-II_I[
L

tl/]6"

TOP ACCESS FOR WIRING,
REFRIGERANT g ACCESSORY
CONDENSATE DRAINAGE
[OPTIONAL)

ACCESS TO CONDENSATE
PUHP THRU SIDE PANEL

[2783

8
E
A

0"-8/16"

-_7

[253]
0"-6

VIEW

'-4"

o'-11L

FRONT

[291

VIEW

[8]

O' - 10 _
[254]

4_/4
°
1t093
ALTERNATE

TOP

1/8"

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

DIA

0"-1

9/16"
[I87]

AUTOMATIC

AIR

SWEEP LOUVERS _

A08580

UNIT
SIZE
024
036
048
060

WEIGHT
Cooling
Only
108
117
149
179

(Ib)
Heat
Pump
110
119
151
181

A
if-in,

4-215/16
4-1013/16
5-119/16
7-8

1294
1493
1817
2336

if-in,
3-10
4--57/8
5--65/8
7--3

Fig. 1 - 40QA

if-in,

1169
1368
1692
2211

4-15/8
4--91/2
5--101/4
7--65/6

1260
1459
1783
2302

Dimensions

if-in,
--1 --97/8
1 -- 115/6

mm
--555
601

if-in.
1-95/8
2--11/2
3--31/16
4-- 119/16

549
648
992
1512

UNIT SERIES
38HDRO18
38HDRO24
38NDR030
38NDR036
38HDRO48
38NDRO60

I
1.2
t
I
1,2
1,2

ELECTRICAL
CHARACTERISTICS
x

X
x

0
0

x
x

o
o

x I
x I

x
x

XlOlXlX
6

('0
04

'-9,
"T',
0

(_0
04

eb
0

Z5
31
37
37

I18"
1/8"
3116"
3/16"

3/16"

36
36
44
44
44

43 3116"

15116"
15/16"
9116"
91t6"
9/161

44 9116"

14
14
17
17

9116"
9/16"
I116"
1/16"

16"
16"
18 7116"
18 7/16"

1/161

17 I116"

Z3
23
30
30

T116"

7116"
T/16"
IIZ"
1/2"

18 7/16"

I/Z

17
17
19
19
19

30 IIZ"

3116"
3/16"
518"
5/8"
_181

19 518"

G
17
23
29
29
3S

118"
1/8"
3/16"
3/16"

22"
28"
34 I116"
34 1/16"

_/161

35 3/16"

1/161

40 I116"

13"
14"
13 11116"
13 11/16"
14

I/Z

14 IIZ"

6
6
8
B

518"
3/4"
118"
1/8"

11
11
t5
t5

I14"
5/8"
7/8"
7/8"

I/Z

7/S

8 I12"

518"
5/8"
314"
314"
I

18 7/8"

N
2
2
3
3

15116"
15116"
7/16"
7/16"

718"

3 7/16"

7/16"

OPERATING SHIPPING
SHIPPING
WEIGHTIIbsl WEIGHTllbs) DIMENSIONS
(L x W x H)

P
6"
6"
6 I12"
6 1/2"

155
180
ZOO
218

Z8J

IIZ"

6 I12"

171
198
223
240
309
319

294

429110-x 18-x 281/1042 9110"
50 1/2" X
50 1/2" X
SO 112" X
50 1/2" X

X
20
20
20
20

REOUIRED CLEARANCES: WITH COIL rACING WALL; ALLOW G" 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.

x : YES
0 : NO

lAIR

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_
I 1/2"

2 1/2"

_--'_L

LIL,

ALL DIMENSIONS ARE IN "INCHES" UNLESS NOTED.

4 3/16-

t '

UNITSI_

lAIR

18,24
30,36,48.60

JUNCTION 80X FOR
POWERSUPLLY AND
1 7111

V
L

18" X 34 1/10"
1/2" X 40 2/10"
1/2" X 40 2/10"
1/2" X 4G 2/10"
1/2" X 46 2/10"

CONTROL CONNECTIONS
!

H'"'"''"'"'""
.........

re,,,
_

J r

FIELD CONTROL SUPPLY""-----....
WIRE ENTRY
7/8" HOLE W/GROMMET

/-_M

VAPOR LINE CONN.
FEMALE SWEAT CONN.

1/2"

_-_3/8"

LIOUID

LINE

FEMALE SWEAT CONN,

Fig. 2 - 38HDR

Outdoor

Unit Dimensions

4 I12"

- English

MOUNT_ PAD
D_
23"

X 42"

24"

X 50"

POWERSUPPLY CONN.
HOLE SIZES PROVIDED:
718"-1/?"TRADE
1 3/1G"-314"TRADE
1 318"-1"TRADE

EL_
CHARACll_

UNIT
38HDR018
38HDR024
38HDR030
38HDR036
38HDR048
38HDR060

I
1,2
I
I
1.2
1,2

x
x
x

O
O
O

O
O
OIO

x
x

o
o

XlX
XlX

XlOlXIX

O
O

638.2
790.6
944,6
944.6
t097.0
1097,0

938.2
938,2
1t3t.9
1131.9
1t31.9
1131_9

369.9
369,9
433,4
433.4
433.4
433,4

406,4
406.4
4G8.3
468.3
468,3
468,3

595.3
595.3
774,7
774.7
774.7
774.7

436,6
436.6
498,5
498.5
498.5
498,5

435.0
587.4
741,4
741.4
893,8
893,8

558,8
711.2
865.2
865.2
1017,G
1017,G

330.2
355.6
347.7
347.7
368,3
368,3

t68,3
171,5
20G.4
206.4
215,9
215,9

285,8
295.3
403.2
403.2
479,4
479.4

15,9
15,9
19.0
19.0
22,2
22,2

74,6
74_G
87.3

t52.4
152.4
tG5.t

87.3
87,3

87.3

0PB_ATING _
WBQHT'_G)int0t.mKO)Dt,ABVSK3NS
L x Wx
70,4
81.8
90.9

77,7
90,0
101.4

1090,2 X 457,7 X 714,3
1090.2 X 457,7 X 8GG,7
1282.7 X 520.7 X 1020,7

165.1

99.0

109.0

12B2.7
x 520.7x 1020.7

t65.t

t29,0

140,4

1282,7

165.1

t33,6

145.0

1282,7x 520.7x 1173.1

X 520,7

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,

X = YES
O: NO

lAIR

2, MINIMUM OUTDOOROPERATING AMBIENT [H COOLING
MODE IS 12._C.
MAX. 51.?C.

LL I

3. SERIES DESIGNATION IS THE 13TH POSITION OF THE
UNIT MODELNUMBER,
4, CENTEROF GRAVITY_
190,5_

I!!/1
I

5, ALL DIMEHSIONS ARE IN "MM" UNLESS NOTED.

uNrr sizz

18.24

30,36.48,60

175

36.5-"
CONTROLCONNECTIONS

• '"'"'"....................

,I f

FIELD CONTROLSUPPLY_
WIRE ENTRY
22.22 HOLE W/GROMMET

38,1
D

H
_M

FEMALE
SWEATCONN.
VAPORLINE
CONN.

GI/

]

"L
r

FEMALESWEATCONN.

Fig. 3 - 38HDR

Outdoor

Unit Dimensions

- SI

MOUNTING
PAD
584.2

X t066.8

609,6

X 1270,0

FIELD POWERSUPPLYCONN.
HOLE SIZES PROVIDED:
22.22 - 12.70 TRADE
30,16 - 19,05 TRADE

JUNCTION BOX FOR
POWERSUPLLY AND

I
I

X 1173,1

34.92

- 25.40

TRADE

E_C_CAL
UNIT 5B_IESCHARACT_S_CS
38QRR018
38QRRO24
38QRR030
38QRRO36
38QRR048
380RR060

0
0
0
0
0
0

XlOlOlO
X
X
X

0
0
0

010
xlx
XlX

Xl°lXIN

A
25
31
37
37
43
43

1/8"
I18"
3116"
3116"
3116"
3116"

B
36
36
44
44
44
44

t5/t6"
15116"
9116"
9116"
9116"
9116"

C
14
14
17
17
17
17

9/16"
9116"
1116"
1116"
1116"
1116"

t6"
16"
18 7116"
18 7116"
18 7116"
18 7116"

23
23
30
30
30
30

7/16"
7116"
112"
112"
112"
112"

17 3/16"
17 3116"
19 518"
19 518"
19 518"
19 518"

t7
23
29
29
35
35

1/8"
I18"
3116"
3116"
3116"
3116"

22"
28"
34 1116"
34 1116"
40 1116"
40 1116"

13"
14"
13 11116"
13 11116"
14 112"
14 112"

K
6
6
8
8
8
8

5/8"
314"
118"
118"
112"
112"

1t
11
15
15
18
18

1/4"
518"
718"
718"
718"
718"

5/8"
518"
314"
314"
718"
718"

2
2
3
3
3
3

15!16"
15116"
7116"
7116"
7116"
7116"

6
6
6
6

6"
6"
112"
112"
112"
112"

OPB_ATING SHIPPING

SHIPPING

WBGHTabs)
WBGHTllbs)
DIMB_ISIONS
(L x W x HI
167
183
429110.x_o,,x 28ino"
176
187
232
278
306

194
210
255
303
331

42 9/10"
50 1/2" X
50 1/2" X
50 t/2"
X
50 112" X

X
20
20
20
20

18" X 34 1/10"
1/2" X 40 2/10"
1/2" X 40 2/10"
t/2"
X 46 2!10"
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.

X : YES
0 : NO

2. MINIMUM OUTDOOR OPERATING AMBIENT IN COOLING
MODE IS 55°F, MAX. 125°F.
IAIR

3, SERIES DESIGNATION IS THE 13TH POSITION OF THE
UNIT MODEL NUMBER,
4, CENTER OF GRAVITY_
5. ALL DIMENSIONS ARE IN "INCHES" UNLESS NOTED.

T
I

_IhlIVlUM
UMT SITW

MOUNTINGPAD

DIMB_ISIONS

18,24
30,36,48,60

K
I

23" X 42"
24" X 50"

IAIR
JUNCTION BOX FOR
POWER SUPLLY AND
CONTROL CONNECTIONS
o

F-i

FIELD CONTROL SUPPLY_---_
WIRE ENTRY
718" HOLE WIGROMMET
_t

VAPOR LINE CONN,
FEMALE SWEAT CONN,

1/2"

[]

LIOUID LINE
MALE FLARE CONN.

Fig. 4 - 38QRR

Outdoor

Unit Dimensions

- English

POWER SUPPLY CONN,
HOLE SIZES PROVIDED:
718"-II2"TRADE
1 3116"-314"TRADE
1 318"-I"TRADE

B.ECTRICAL

UMT SB:IIES
CHARAC'I'B_ISTICS
380RR018
380RR024
380RR030
380RR036
380RH048
380RR060

0
0
0
0
0
0

x
x
x
x

0
0
0
0

0
0
x
x

I
I
I

638.2
790.6
944.6
944.6
1097,0
1097.0

XlOlXlX

938.2
938.2
1131,9
1131.9
1131.9
1131.9

369.9
369.9
433,4
433.4
433,4
433.4

D
406.4
406.4
468.3
468.3
468.3
468.3

595.3
595.3
774,7
7?4.7
774.7
774.7

436.6
436.6
498,5
498.5
498,5
498.5

G
435.0
587.4
741.4
741.4
893.8
893.8

558.8
711.2
865.2
865.2
1017.6
1017,6

330.2
355.6
347,7
347.7
368.3
368,3

K
168.3
171.5
206,4
206.4
215,9
215.9

285.8
295.3
403.2
403.2
479.4
479.4

15.9
15.9
19.0
19.0
22.2
22.2

I.
X : YES
0 : NO

74.6
74.6
87.3
87.3
87.3
87.3

152.4
t52.4
165.1
165.1
t65.1
165.1

OPERATINGSI-IPRNG
SHIPPING
WBOHT(KO)
WBGHT(KO)
DIMB_51ONG
(L x W x H)
75.9
80.0
85.0
105,4
126.4
139.0

83.2
88.2
95,4
115.9
137.7
150,4

1090.2
1090.2
1282.7
1282.7
1282,7
1282.7

X
X
X
X
X
X

457.7
457.7
520.7
520.7
520.7
520.7

X
X
X
X
X
X

REOUIRED 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.
MINIMUM OUTDOOROPERATING AMBIENT IN COOLING
MODE IS 12.8°C, MAX. 51.7°C.

2. SERIES DESIGNATION
UNIT MODEL NUMBER.

IS THE 13TH POSITION OF THE

4. CENTER OF GRAVITY_
190,5

!!r'll

63.5

ALL DIMENSIONS

UNIT SI2_

106.4

18,24

IAIR

30.36,48,60

ARE IN "MM" UNLESS NOTED.

MINIMUM
MOUNTING
PAD
DIIVlB_51ONS
584,2

X 1066.8

609,6

X 1270.0

J uu'
FFIELD
/HOLE
/22,22
/30.16

JUNCTION BOX FOR
POWER SUPLLY AND

CONTROL CONNECTIONS

B
o

38.1
o

VAPOR LINE CONN.
FEMALE SWEAT CONN,

[]

° _.L._u
q

LIOUIDLINE
MALE FLARE CONN.

Fig. 5 - 38QRR

Unit Dimensions

1
203.2
114.3

25,4

Outdoor

36.5 _
_/34.92-25.40TRADE

.I/

FIELD CONTROL SUPPLY_------_
WIRE ENTRY
22.22 HOLE WlGROMMET

- SI

714.3
866.7
1020,7
1020.7
1173,1
1173.1

POWER SUPPLY CORN,
SIZES PROVIDED:
- 12.70 TRADE
- 19.05 TRADE

These

installation

systems

listed

Parts

List

Indoor
The

instructions
in table

cover

the installation

of the matched

Table
System
Type

Unit

following

items

are included

Table

with

the indoor

I - Installation

unit:

""5
o
O

Materials

Part No.
1
2

Name of Part
Side Panels
Hex Head Bolts

Qty.
2
4

3
4

Mounting Bracket
Pistons

2
1

5
6

Installation Template
Adapter Tubes

1
2

2 - Matched

Nominal
Capacity

Systems

Outdoor Unit

Indoor Unit

018

38HDRO18---3

40QACO24.

- -3

024

38HDR024---3

40QAC024---3

030

38HDR030---3

40QAC036---3

036

38HDR036---3/5/6

40QAC036---3

048

38HDRO48-

- -3/5/6

40QACO48-

060

38HDRO60-

- -3/5/6

4OQACO6O- - -3

- -3

018

38QRRO18---3

40QAQO24---3

024

38QRRO24-

40QAQO24-

030

38QRRO30---3

- -3

40QAQO36---3

iD.

:'r
MOUNTING
SLOT

036
048

38QRRO3638QRRO48-

- -3/5/6
- -3/5/6

40QAQO3640QAQO48-

060

38QRRO60-

- -3/5/6

4OQAQO6O- - -3

Units must be configured
on page 9.

for 1-1/2

SYSTEM

ton operation.

- -3
- -3

Refer to instructions

REQUIREMENTS

Clearances
Allow

sufficient

space

around

the indoor

proper airflow circulation
and servicing.
Fig. 5 for minimum required clearances,

HEX-HEAD
BOLT

Piping:

Piping

PiDin_

Lengths

The minimum
A09532

Fig. 6 - Hanging

Fan Coil Unit

(3 m).

and insulation

length between

Outdoor

Unit

The following

items are included

with the outdoor

u-FILTER

unit:

unit

for

to Fig. 1 through

is field supplied,

the indoor

Refer to table 3 for the maximum
Table 3 - Maximum

and outdoor
Refer

and outdoor
lengths

Refrigerant

units is 10 fl

allowed.

Line Lengths

Unit
Size

Max Line
Length if(m)

Max Elevation (ID
over OD) if(m)

Max Elevation (OD
over OD) if(m)

18K
24K

200 (61)
200 (61)

65 (19.8)
65 (19.8)

200 (61)
200 (61)

3OK
36K

200 (61)
200 (61)

65 (19.8)
65 (19.8)

200 (61)
200 (61)

48K
6OK

200 (61)
200 (61)

65 (19.8)
65 (19.8)

200 (61)
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

A09536

4 for

pipe

sizes.
Table

Fig. 7 - 38HDR018-036

PISTON
HEATING
PISTON

CAP

__ET_ERE_I_/--FLARE

FILTER

/--/DRIER

_._LINE

!(BY

SET

OTHERS)

HEATING

A09537

Fig. 8 - 38QRR018-036

Model

Filter Drier

38HDR
38QRR

_"
w-

Piston
Cap
w-

4 - Pipe

Sizes

PIPE SIZES (in)

Pistons
w-

Flare
Connector
w-

Unit Size

Liquid Phase

18
24
30
36
48
60

3/8
3/8
3/8
3/8
3/8
3/8

Vapor
38HDR
5/8
5/8
3/4
3/4
7/8
7/8

38QRR
5/8
5/8
3/4
3/4
3/4
3/4

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

Refriuerant

Charge

Power and Connecting
Power:

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

Additional

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

Charge

Unit Size

Charge
38HDR

018
024
030
036
048
060

0.7 (0.32)
1.3 (0.59)
1.4 (0.64)
0.2 (0.1)
0.2 (0.1)
0.5 (0.23)

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

lb. (kg.)

CEC (Canadian Electric Code) for any special requirements.
• Use Table 7 for the electrical requirements for the outdoor units

38QRR
0.7 (0.32)
0.8 (0.36)
0
0.5 (0.23)
0
0

and Table 8 for the indoor units to correctly size the cables and
disconnect switches.

Control Wiring
Thermostat

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.

indoor
the

Metering
Device
The 40QAC and 40QAQ units use an accurator or a TXV as
shown in Table 6.

Cooling Only
40QAC
TVX
TVX
TVX
TVX
TVX
TVX

018
024
030
036
048
060

NOTE: Pistons are supplied with either the indoor or outdoor

Table

units

18 AWG

User Interface
the

Heat Pumps

only

units.

used

for

A two

and

control

wiring

conductor

a seven

conductor

is recommended

between

the

is required

for

is required

cable

for

cable
any

length

of the
type

following

of system

9 to select

- Finished
three
on hand

the proper

thermostats
and the

can

desired

be used

depending

features.

Refer

thermostat.

units.

/ QRR

Electrical

Requirements
38QRR

UNIT SIZE

V-PH-Hz

018

208/230-1-60

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

208/230 -3 -60

13.0

14.1

460-3 -60

7.9

208/230-1-60

26.4

34.6

208/230-3

17.9

22.4

8.4

10.0

208/230-1-60

34.5

208/230 -3 -60

21.5

23.6

10.6

048

MIN CKT AMPS

-60

460-3 -60

060

460-3-60

Table
UNIT

8 - 40QAC

VOLTAGE
V-Ph-60
Hz

/ QAQ

FUSE/HACR
AMPS

Electrical

BKR

MIN CKT AMPS

FUSE/HACR

BKR AMPS

Requirements

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
System Type

Model Number

Cooling Only & HP
53DFS250-SL

Cooling Only
53DFS250-FS

Cooling Only
53DFST2-NP

7 Day Programmable
=

5+1 +1 Day Programmable
Remote Room Sensor

Dry Contact Equipped

to Table

38QRR
40
43
55
63
73
80

7 - 38HDR

Goods Accessory

38HDR

036

up to 200

(61.0 m).

Sizes

40QAQ
49
55
65
70
80
TXV

should

outdoor

pumps,

Any

Unit Size

wires
and

cooling

heat

Table 6 - Accurator

Cables - Field Supplied

Operating

INSTALL

Range

Ensure that the system operates
shown in the following tables.

Cooling

operating

the application

guidelines

Plan the installation

Indoor Unit

(35)

operating

(21.7)

(19.4)

cessory

Indoor Unit

2. Remove

the indoor

down and perform

(13.9)

a. Remove

Minimum
DB
WB
°F (°C)
°F (°C)
-20

a power

(19.4)

80
(26.7)

71
(21.7)

55
(12.8)

accessories

is available

the unit adja-

ventilation

unit from the carton
the following

kit ac-

side panels

and place it upside

steps:

by sliding forward,

then away from

See Fig. 9.
[4721
; 3/16"

LOOSEN

BOLTS

AND

SLIDE-

"_3Js"_J

HOUNTIBG BRACKET THIS

OIRECIION_TO
RENOVE
2 I/8 ,4

(23.9)

place

is available.

sides of the unit.

Maximum
DB
WB
°F (°C)
°F (°C)
75
67

you begin.
If possible,

wall and fresh air is required,

range:

Outdoor Unit

before

unit location.

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

Minimum
DB
WB
°F (°C)
°F (°C)
55
(12.8)
67
57

Maximum
DB
WB
°F (°C)
°F (°C)
128
(51.7)
95
71

UNIT

carefully

1. Select indoor

range:

Outdoor Unit

Heating

within

INDOOR

(-28.9)

)[3_8

4_2_i.
314"

Accessories
An extensive

list of field installed

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

'L'OE
'BE,,EL
T.',J //i/
BIRECTION_TO
(LIQUID

accessories,
especially
on the indoor
easier if planned ahead.

units,

can be installed

much

SIDE)

_WPOB
SIBE_/
R,EMOVABLE

REHOVE

AIR

FILTER

F, ,,,B. --L,.
i

\.,.,...ooE_

NEC

LU=

.I."

"d6*

8LK 230_'

048,0

_L_,
L_L_J
THER"
O,____T AT

( N_)ENSATE I>JNP
A{;tE SORY
_S
i_

TRAI

NOTE ?

0_2

IFM?
C O['LY

_EPO'/E
'_HEN
_CCE;SO
Y IS

U',E

--4HT_WHT

TBf

PL[

....
!YE

PL2

-----t

T_4
'

ALTERN#TE

T'STAT

,4/AIR

,WEE>
F J['±CITOR
CONTROL RELAY
DEFI@ T IELAY

EQUII .GN).
E_UII :"El T POUiD
F>T
FREEZE PROTECTI(N
THE_MO
F!
FAN _ELAY
FU
FUE

:_>

2. bI!E [[, ACCORDANCE
_ITH ATION#L
ELECTRICALCOlE .E.C.
AN[} LOCAL{:ODES.
3. TRAnSFORmER
IS 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:
¸YELLOW
WIRE FRO_ _3 TO BE CONNECTED
TO _SRI.
BL_¢I.
_ WIRE TO BE _I_;(:r)N_4ECTE_)
FROM_SR_.
LEA/E ISLe'OKWIRE TIE W_>I_E[} TO YELLOWWIRE.

sLeeK

FACTOR_

AS_

NOTE5

CLARKE

DELAY

TAT

COMPONENT ARRANGEMENT

OR#l}

_EL_

MOTOR
i

iiiiii

)ELAy RELAy
F'Rt ER

E(; JIP (_N)
F]EL

PO_E_

OI_CON_ECT PER NE¢

A09597

Fig. 20 - 38HDR

and 40QAC

Cooling

System

Wiring

Diagram

SCHEMATIC - HEATPUMP

LEGEND

NOTES

TER

(>
()

:.J
Fq
f:

A09598

Fig. 21 - 38QRR

and 40QAQ

Heat Pump

System

Wiring

Diagram

Complete

Connect

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.

guidelines

3. Cut the liquid
tube cutter.

the correct

piping
should
ward

a small amount

the conditioned

regular

line to the correct

of refrigerant

length

using

space.

flow of condensate

be pitched

toward

water,

pipe

in. per ft.

is routed

through

the side of the unit, at-

tach a field fabricated
piece of sheet
drain pipe as shown in Fig. 23.

piping connections.
lines and make flare

the drain

an open drain or sump at a down-

slope of at least 1/4

3. If the drain piping

4. Remove the flare nuts from the indoor
Install them onto the liquid and suction
connections.
5. Apply

inside

2. To insure

in mind.

and suction

Line

1. Use hard polyvinyl chloride (PVC) pipe material with nominal ID of 3/4 in. to connect at drain line. Use pipe insulation 1/4 in. thick, such as Armaflex insulation,
on exposed

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

Drain

Observe all local sanitary codes when installing condensate
drains.
Refer to Fig. 23 for drain pipe connection
from indoor unit.

1. On heat 400A0024
- 048, the cooling piston {indoor} is
shipped in the factory installed metering device with the indoor unit. Use Table 6 to verify that you have
piston size for the system being installed.

Condensate

4. Attach drain pipe with nylon
as shown in Fig. 23.

metal

wire tie passing

oil to the flare connec-

to support
through

the
hole

KNOCKOUT {REAR PIPING)

tion and tubing.
6. Align the tubing
door unit.
7. Tighten
wrenches
NOTE:
pipe

When

adaptors

with the refrigerant

the flare nut and finish
as shown
piping
are

the installation

on the inusing

two

in Fig. 22.

is being
supplied

adaptors
to the indoor
ends to the line set.

connections

unit

routed
with

from
the

connections

the top or side, two

unit.
and

Flare
sweat

the

WIRE TIE
HOLE

pipe

DRAIN

PIPING

REAR EXIT

the other

PIPING

HOLE FOR RIGHT

,_._

DRAIN PIPING

DRAIN PIPING PLATE (F_eldFabrtcaed)

RIGHT- HAND EXIT
A09534

Fig. 23 - Routing

A07354

Fig. 22 - Tighten

Flare

Drain

Piping

Nut
NOTE:

8. Insulate both connections
on the 38QRR
connection on the 38HDR units.

and the liquid line

Do not fasten

insulation,

nylon

5. Install an external
NOTE:

Should

may be ordered
pump

wire ties tight enough

to deform

the

as this affects performance.

before

trap at the end of the condensate

the installation
as a fields-installed

hanging

the unit.

require

one,

accessory.

a condensate

line.
pump

It is easier to install

Complete

Control

2. Route

Wiring

1. Run the control
indoor unit.

wiring

close to the ternfinal block

on the

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

Be sure field wiring complies with local building codes
and unit voltage is within linfits shown in Table 12.
Contact
voltage.

local

power

company

for correction

3. Connect
wire
ground screw.
NOTE:
wire

Unit

When
away

sharp

and NEC,
line

leads

from

to high

routing

from

voltage

and

The 208/230-v

units

operation,

interchange
the blue (208-v)
unused wires with wire nuts.

Failure to follow
or death.

this warning

1. Mount thermostat
hardware provided

injury

stat, preferably
jected to drafts

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.

board

(TBI)

and

condensate

piping

and

any

are factory

wired

For

to 24-v

208-v

for 230-v

operation,

wires.

Cap

any

wires

Refer to Table 9 for a

on an interior wall, in an area that is not subor direct sunlight through windows.
wires to the control

the thermostat

3/8 in. space between
Route

thermostat.

to a wall in the occupied
space using
with the thermostat.
Locate the thermo-

Run the thermostat
unit. If running

to the fan
box.

Thermostat

systems use a three speed
list of recommended
thermostats.

could result in personal

ternfinal

and red (230-v)

These
HAZARD

disconnect

on the control

the wire in the unit, use care to keep the

refrigerant

transformer

Install
ELECTRICALSHOCK

inside

the whole

edges.

NOTE:
24-v

of improper

line power

coil. Place wire through

through

box of the indoor
the back of the unit,

the unit and the wall is required.

over refrigerant

and drain

piping

as shown

Fig. 24.
[]NIT

DAMAGE

HAZARD

Failure to follow this caution
or improper operation.

may result in equipment

damage

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:
unit.

Use copper

NOTE:

wire only between

Install branch circuit

disconnect

of adequate

size to handle

accessible
from, unit, per section 440-14
of NEC.
allow indoor unit to share disconnect
with outdoor

within

local code before

sight

*Field-supplied.

of,

installing

A09533

Fig. 24 - Routing
NOTE:
impede

ground

and power

ELECTRICALSHOCK
Failure to follow
or death.

check

disconnect

and

and readily
Some codes

can be locked;

Locate

switch(es)

current

unit if disconnect
in this manner.

per NEC.

disconnect

unit starting

1. Route

wires.

HAZARD

this warning

could result in personal

with existing

electrical

Do not route

wires

Wires Over
under

Piping

the piping,

injury

codes.

or wires

could

air filter removal.

4. Connect the thermostat wires to the indoor
for a 40QAC unit and Fig. 26 for a 40QAQ

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

REFRIGERANTPIPING

unit per Fig 25
unit.

THERHOSTAT

THERMOSTAT
m

TB2

FT-

T82

E
J

E
HP ONLY

B-

r
COOLING

ONLY--_

r_q
[]
E0
m

H_[]

rfq

A09545

Fig. 25 - Thermostat

Reassemble

Wire

Connection

for 40QAC

Fig. 26 - Thermostat

Indoor Unit

Evacuate

1. Reinstall

filters and inlet grilles

2. Reinstall

the side panels

START-UP
Preliminary
1. Check

Checks
condensate

the drain

drainage

connection,

system;

insert

a water

on the opposite
bottle

up into

side of

Wire Connection

and Dehydrate

UNIT

DAMAGE

HAZARD

Failure

to follow

this caution

for 40QAQ

the System

may result in equipment

or improper operation.
Never use the system compressor

as a vacuum

damage

pump.

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.

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

LOUVERS

charge

hose to vacuum

pump.

3. Fully open the low side of manifold
4. Start vacuum
5. Evacuate
method.
6. After

using

either

evacuation

manifold

gage. (See Fig. 29.)

pump
deep

vacuum

fully

is complete,

gage and stop operation

triple

evacuation

the low

of vacuum

side of

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
the maximum
allowable length.
A09538

Fig. 27 - Inserting
2. Make
tight.

sure all wiring

3. Field electrical
plate rating.
4. Check

connections

Pan

are correct

power

source

must

that all barriers,

covers,

and panels

sure that the filters
have been installed
tioned

Water Into Drain

agree

and they are

with

unit

valves

hose from charge

9. Fully open service

valves

10. Securely

name

tighten

are in place. En-

of the low

valves.

Refrigerant

and return-air
grilles on the indoor unit
and that the discharge louvers are posi-

connection

Indoor Unit

Low Side
High Side

Service

Valve

must be closed.
A07360

6. On units with crankcase heaters,
are tight around the compressor.

ensure

belly-band

heaters

Fig. 28 - Service

up to

B and A.

caps of service

Outdoor Unit

correctly.

5. All service

8. Disconnect
charge
side service valve.

piping

Valve

Triple

Manifold Gage

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.
500 microns

Low side valve

Refer to Fig. 31 and proceed

_Z.)
High side valve

Charge

hose-_

2. Close service
/

Charge

hose
Vacuum

as follows:

1. Pump system down to 28 in. of mercury and allow pump
continue operating for an additional 15 minutes.

3. Connect
pump

valves

a nitrogen

open until system
4. Close service

and shut off vacuum
cylinder

pressure

pump.

and regulator

to system

and

is 2 psig.

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
then be free of any contaminants
and water vapor.

Low side valve
A07361

will

IEVACUATE
I

Fig. 29 - Manifold

I BREAK VACUUM WITH DRY NITROGEN I
Deep Vacuum

Method

The deep vacuum
method requires a vacuum
pump capable
pulling a vacuum of 500 microns and a vacuum gage capable
accurately

measuring
is the most _ositive

[28!3

of
of

IEVACUATE
I

this vacuum depth. The deep vacuum method
way of assuring a system is free of air and

IBREAK VACUUM WITH DRY NITROGEN I

liquid water. See Fig. 30)

IEvACuATE
I

ICHECK
FOR
T,GHT
OR¥
SYSTEM
I

LEAK IN
SYSTEM

(IF IT HOLDS DEEP VACUUM)

I RELEASE
C,ARGE,NTO
SYSTE I

A95425

VACUUM TIGHT
TOO WET

Fig. 31 - Triple

TIGHT
DRY SYSTEM
1

3
4
MINUTES

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.

A95424

Fig. 30 - Deep

Vacuum

2. Release charge into the system by opening
liquid and suction line service valves.

Graph

3. Set the wireless
low ambient
4. Refer

remote

temperature.

to Table

control

or wired

Operate

5 to determine

(back-seating)

remote

control

be-

the unit for 15 minutes.
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
5. Calculate

charge that is required
the total additional

beyond

charge

25 ft (7.6 m).

required

and weigh

6. Charge should be added as liquid (not gas) slowly
fully to low side to avoid liquid slugging.

in.

and care-

OPERATING
Ceiling-suspended

SAFETIES

SEQUENCE

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
continuously.
A switch
the swing

flmction

the unit can be stationary
or swing
located at the bottom of the unit will turn

on and off.

Ceiling-suspended

systems

power ventilation

kit and/or

FAN

OPERATION

operation.

See

may be equipped

thermostat

condensate

pump.

Fan

are

coils

instructions

with

an accessory

senses

MODE

a demand

OPERATION

for cooling,

fan

speed

condensate

pump

(if so equipped)

switch

will continue

to operate

runs whenever

If the unit has the accessory

ventilation

operate

fan is set for medium

HEAT

PUMP

senses

a demand

the indoor
OPERATION
for heating

speed (if not already
energized.
The internal

kit, the ventilation

When

the indoor

operating),

the

UNIT

thermostat

pump

(if supplied)

thermostat are not operated during heating
relay (CR2)
closes, and the compressor

this warning

DAMAGE

Failure
damage

could

result

in personal

system,
in the

avoid

main
OFF

switch.
label.

HAZARD

to follow this caution
or improper operation.
shrinkage,

may

not

wash

result
filter

in equipment
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.

fan will
thermostat

valve will not be

For

proper

maintenance
Lubrication

condensate

HAZARD

position. There may be more than 1 disconnect
Lock out and tag switch with a suitable warning

the

fan will start in the selected

and the reversing

MAINTENANCE

Before installing, modifying,
or servicing
electrical
disconnect
switch
must be

or high speed.
room

freeze

of 28 °F (-2.22 ° C) or
fan will be shut down

off.

AND

Failure to follow
injury or death.

fan will stop with the compressor.

whenever

will turn the system

ELECTRICALSHOCK

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

safety

coil

selection.

is energized.

until the room

the following
Indoor

3-speed

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

with

components:

accessory condensate
pump, cooling cycle only) -- If the level of
condensate
in the drain pan rises too high, the condensate
float

When the room thermostat

the fan coil relay board

is equipped

system

until the coil temperature
exceeds 28°F (-2.22°C).
The indoor fan
will continue to run. Condensate
float switch (units equipped with

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

The system

protect

protection
thermostat -- If a coil temperature
lower is sensed, the compressor
and outdoor

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

-to

CLEANING
capable

for

devices

and freeze protection
operation.
The control
and outdoor
fan are

system

operation,

operations

in Table

outdoor-fan

The

motors

indoor-fan,

are factory

perform

the

cleaning

automatic

air sweep,

and

13.
lubricated

and require

and the

no oiling.

AIR FILTERS

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
DFB logic

(factory default setting) of compressor
checks the defrost thermostat
(DFT).

UNIT

run time, the
If the DFT is

Failure
damage

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

The DFB logic checks
the DFT opens
back to normal
DFB switches

the 10-minute

defrost timer

turns off

and the DFT. If

in less than 10 nfinutes, the DFB switches the unit
heating operation.
If the DFT remains closed, the
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

HAZARD

to follow
this caution
or improper operation.

may

result

in equipment

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.

(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,
the electric heater and stops the indoor fan.

DAMAGE

REMOVE
AIR
straight out.
CLEAN
or washed

FILTERS

REPLACE

in warm

Remove

FILTERS

filters
Filters

water. Shake filter to remove

pulling

them

can be vacuumed
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.

Table

13 - Cleaning

INDOOR

and Maintenance

Schedule

MONTHLY

TASK

QUARTERLY

YEARLY

UNIT

Clean Air Filters

X
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
Clean Outdoor Fan

are Tight

Clean Outdoor Coil

Check that Outdoor Fan Assembly
Clean Drain Pan
NOTE:

Maintenance

CLEAN

procedures

INDOOR

UNIT

panel of the unit becomes

is Tight
X

for the outdoor

BOTTOM

units are in the individual unit installation

PANEL

dirty or smudged,

panel with a soft dry cloth. Use
off carefully with a dry cloth.

a mild

If the bottom

wipe the outside

liquid

detergent

SERVICE

of the

and wipe

CLEAN
INDOOR
COIL -- To clean the coil, remove indoor
unit bottom panel and vacuum the coil fins, using care not to bend
or damage
CLEAN

CUT

ELECTRICALSHOCK
Failure to follow
or death.

fins.
OUTDOOR

COIL

(Outdoor

instructions.

[]nit)

HAZARD

this warning

could

result in personal

injury

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.

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.

ENVIRONMENTAL
Failure to follow
damage.

To clean

the outdoor

1. Remove

from discharge

this caution

may

result

in environmental

Federal regulations
require that you do not vent refrigerant to
the atmosphere.
Recover
during system repair or final unit
disposal.

coil:

any dirt or obstruction

HAZARD

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
CLEAN

CONDENSATE

pans at the start of each cooling
water into the drain.
To clean

replace

A. REMOVE FILTERS

coil fins to flush out debris.
DRAINS

drain

season.

Clean all drains
Check

and drain

the flow by pouring

pan:

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

INTAKE
GRILLE

that may

B. WASH

FILTERS,

((("

spill from drain pan.
2. Remove
tached).

the

intake

grille

3. Remove

the condensate

water drain into a 3-gallon

[]NIT

DAMAGE

and

water

distribution
in the drain

assembly

(at-

pan by letting

bucket.

HAZARD
C. VACUUM

FILTERS

Failure to follow this caution may result in equipment
damage,

A09539

Fig. 32 - Cleaning

Do not use a screwdriver to pry drain pan out of assembly
- it could damage the pan.
4. Remove
5. Carefully

the 4 screws holding

the drain pan.

hold the drain pan to remove

it from the assembly.

Filters

Before

Calling

for

IF SYSTEM FAILS TO OPERATE -- Be sure:

Service

Save the cost of a service
1. Be sure main power

call by doing
to system

the following:
is turned

on.

2. Press Mode button

until OFF is displayed.

3. Press Mode button

until either

Wait 5 minutes.

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 necessary. If system does not operate properly, check Table 14
for typical solutions.

•

unit ON/OFF switch is in ON position

•

fuse or circuit breaker is not tripped

FRESH

AIR INSTALLATION

The

have

units

an installation

installation
of fresh
Before
beginning,
building

practices,

OPTION

option,

which

allows

for

field

air ventilation.
Plan the installation
carefully.
measure
carefully
and
follow
acceptable
NEC,

and local codes.

Ventilation-Air
Accessory
installation
instructions.

Refer

to ventilation

air accessory

TROUBLESHOOTING
If the under-ceiling
Refer to Table
If the problem

fan coil unit fails to start or operate

properly,

sometimes

the problem

is minor

and can be handled

14 for some common problems, causes, and typical solutions. See Fig. 36 and 37 for additional
cannot be corrected, contact a local dealer for further assistance.
Table
PROBLEM

System Does Not Start.

System Does Not Cool Properly.

unit disconnect

power

switch is off.

is set to night mode.

Replace fuse or reset circuit breaker.*
Turn on disconnect

switch(as).

Cancel mode using Day/Night

button on thermostat.

Power failure.

Restore power.

Unit is in off mode.

Press Mode button on thermostat
plays the desired unit mode.

Three-minute

Wait for 3 minutes.

Temperature
ure.

time delay is running.
is above or below the selected temperat-

Select new temperature

Clean or replace air filter(s).

Temperature

Reset temperature
thermostat.

is set too high or too low.

unit outdoor

coil restricted.

until thermostat

dis-

using the thermostat.

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

Outdoor

to desired comfort setting using the

Remove obstruction.

Fan speed is set too low.

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

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

Clean or replace air filter(s).

Temperature

Reset temperature
thermostat.

Outdoor

is set too high or too low.

unit outdoor

coil restricted.

to desired comfort setting using the

Remove obstruction.

System Does not Heat Properly.

Ice or frost has Formed on Indoor
Coil JInsufficient

Airflow.

Fan speed is set too low.

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

Outdoor

Check manual defrost timer setting and adjust as necessary.

unit outdoor

Low outdoor-air

call.

details.

TYPICAL SOLUTION

Blown fuse or circuit breaker tripped at building
entry.

Thermostat

a service

14 - Troubleshooting

CAUSE

Indoor and/or outdoor

without

system troubleshooting

coil is frosted up.

temperature.

Run system in fan-only

mode until frost is gone.

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

Clean or replace air filter(s).

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.

NO HEATING OR
INSUFFICIENT
HEATING

RUNS BUT
CYCLES ON
INTERNAL
COMPRESSOR
OVERLOAD

COMPRESSOR
WILL NOT RUN

I
RUNS
INSUFFICIENT
COMPRESSOR
HEATING

CLOSED

-"-t

COIL OPEN OR
CONTACTOR
SHORTED

OPEN INDOOR
THERMOSTAT

_-t

PRESSURE
SWITCH
LIQUID-LINE
OPEN

POWER SUPPLY
COMPRESSOR
OPEN

---[

STOPPED

I
._

LOOSE LEAD'S AT
COMPRESSOR

_-[

GEAR 11PHI

COMPRESSOR
STUCK

"_1

LOSS OF CHARGE

___

OVERLOAD
COMPRESSOR OPEN

LEADS

FAN

DISCHARGE
RESTRICTION

LINE
IN

OR NONCONDENSABLES
OVERCHARGE
IN SYSTEM

FAN

MOTOR

BURNED
FAN
MOTOR
OUT

OPEN
CIRCUIT
CONTROL

OR GROUNDED
COMPRESSOR
MOTOR
___OPEN'SHORTED'
WINDINGS

DEFECTIVE
CAPACITORRUN

TOO
_--I

LINE

HIGH

FAN
AT

--[

VALVE
REVERSING
STUCK

ODT SET-rING
TOO LOW

--[

RESTRICTED
LIQUID LINE

CAP TUBE
PINCHED OR
BULB NOT
SENSING TRUE
OUTDOOR
TEMP

__{

PISTON
I RESTRICTED
ACCURATER®
OR CLOGGED

CHARGED
UNDER-

FAN MOTOR
OVERLOAD
INTERNAL
OPEN

BURNED
FAN MOTOR
OUT

NC
CONTACTS OPEN
ON CIRCUIT
DEFROST
RELAY
BOARD

----I

"'t

OUTDOOR
DIRTY COIL

CAPACITOR
DEFECTIVE
(1 -PH) RUN

RESTRICTED
STRAINER

BEARINGS
COMPRESSOR
FAULTY

HEAVILY
OUTDOOR
FROSTEDCOIL

BROKEN FUSE
LINK

]
__l

HIGH-LOAD
CONDITION

"_1

VOLTAGE
LOW

RELAY OR
CONTACTOR
STRIP
HEATER
DEFECTIVE

POWER CIRCUIT
TO HEATER
OPENING
ELEMENTS IN

THERMOSTAT
OUTDOOR
DEFECTIVE

.__

RUNNING

______J

LOOSE MOTOR
LEADS

REFRIGERANT
CHARGE
LOW

]

I OUTI RFAN

STOPPED

OUTDOOR
]

NOT OPERATING

_.____.._1
LOOSE

-1 STR'PHEATE_
I

LOW HEAD

CAPACITOR
DEFECTIVE

DAMAGED
VALVE

I LOWSOCT'ON
I

MOTOR

CYCLING
ON
INDOOR
FAN
OVERLOAD

[

]

REVERSING

_-t

INTERNAL

_-_

ORDIRTY
INDOOR
FILTERSCOIL

NTAOTOR
1
--[CONTAOTO
ENJ
VOLTAGE
DEFECTIVE
TRANSFORMER
LOW-

VALVE JAMMED
IN REVERSING
MIDPOSmON

CONTACTS
WELDED CLOSED
IN DEFROST
FAN
MOTOR
RELAY

DEFROST
THERMOSTAT
DEFECTIVE

THERMOSTAT
IN
POOR PHYSICAL
CONTACT
WITH
DEFROST
TUBE

VALVE DID NOT
REVERSING
SHIFT

-'_

BROKEN
ELEMENT
HEATER

TEMPERATURE
OPENOVERTHERMOSTAT

]

THERMOSTAT
DEFECTIVE
ROOM 1
(2ND STAGE')

]

PROPERLY
_t

SUPERHEAT
HIGH

CHARGED
UNITNOT

t'-

CIRCUIT
DEFECTIVE
BOARD

BAD ELECTRICAL
CONNECTION
ANYWHEREIN
DEFROST CIRCUIT

LEGEND
NC
-- Normally Closed
ODT -- Outdoor Thermostat
NOTE: For systems with indoor units equipped with microprocessor
control, see separate controls, service, and troubleshooting manual.
A07435

Fig. 33 - Troubleshooting

the Heating

Cycle

INSUFFICIENT
NO COOUNG
COOLING OR

[
I

LOW-VOLTAGE
TRANSFORMER
DEFECTIVE

l
COMPRESSOR
RUNS BUT
INSUFFICIENT
COOLING

COMPRESSOR
RUNS BUT
CYCLES ON
INTERNAL
OVERLOAD

[

WILL
NOT RUN
COMPRESSOR

]

POWER SUPPLY
COMPRESSOR
OPEN

LOOSE
COMPRESSOR
LEADS AT ]

]

STOPPED OR
CYCUNGON
OUTDOOR
OVERLOADFAN

RESTRICTED
OR
RECIRCULATING
OUTDOOR
AIR

--_

LOOSE
FAN MOTOR
LEAD AT

LOW
PRESSURE
SUCTION

LOW HEAD
HIGH
PRESSURE
SUCTION

I HIGHSOCT'ON
1
LOW SUPERHEAT

__[
NC CONTACTS
OPEN
DEFROST
RELAYS

_-[

DIRTY
AIR
FILTERS

__{

__]
VALVE HUNG UP
OR INTERNAL
REVERSING
LEAK

OVERCHARGED

--_

STUCK
REVERSING
DAMAGED
VALVE OR

THERMOSTAT
OPEN

_{i

OPENCIRCUIT
CONTROL

]

_-[

LOSS OF CHARGE

]

FAULTY
GEAR

START
(!-PH)

OR GROUNDED
COMPRESSOR
_[

ELECTRICAL
CONNECTION
LOOSE

_[_

___

OPEN, MOTOR
SHORTED,
WINDINGS

INTERNAL
PROTECTION
COMPRESSOR
OPEN

--_

DEFECTIVE
CARAC_OR RUN

DISCHARGE
RESTRICTEDTUBE

DEFECTIVE
MOTOR

_{INOORRECT
CAPACITOR OFM

OR NONCONDENSABLES
OVERCHARGE
IN SYSTEM

__{

]

--_

DEFPOST
THERMOSTAT
DEFECTIVE

COMPRESSOR
DEFECTIVE
VALVES

RESTRICTED
DUCT

DAMPERS
PARTLY
CLOSED

}

INDOOR
FROSTED
COIL

]

SLIGHTLY
LIQUID LINE
RESTRICTED

PRESSURE
RELIEF
iNTERNAL
OPEN

UNIT
ACCURATER
iNCORRECT
PISTON

REFRIGERANT
CHARGE
LOW

COMPRESSOR
STUCK

_{_

TOO HIGH OR
LINE LOW
VOLTAGE

DEFECTIVE
CAPAC_OR RUN

]

RESTRICTED
ACCURATER®

BEARINGS
,_

COMPRESSOR
=¢ULTY

]

ACCURATER
INCORRECT
PISTON

STRAINER
INDOOR
RESTRICTED
COIL

MOTOR
DEFECTIVE

CYCLING BLOWER
ON
INDOOR
OVERLOAD

LEGEND
NC
ODT

---

Normally Closed
Outdoor Thermostat

NOTE: For systems with indoor units equipped with microprocessor
control, see separate controls, service, and troubleshooting manual.
A07436

Fig. 34 - Troubleshooting

the Cooling

Cycle

2009 Carrier Corp. • 7310 W. Morris

Manufacturer

reserves

the right to change,

St. • Indianapolis,

IN 46231

at any time, specification8

and design8

Printed
without

in U.S.A.

Edition

notice and without

Date:

10/09

obligations,

Catalog No: 40QAC-Q-2SI
Replaces:

40QAC-

Q- lSl

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

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