11
Route thermostat cable or equivalent single leads of no. 18
AWG (American wire Gage) colored wire from subbase termi-
nals through conduit in unit to low-voltage connections as
shown on unit wiring diagram and Fig. 10A-10C.
NOTE: For wire runs up to 50 ft, use no. 18 AWG insulated
wire (35 C minimum). For 51 to 75 ft, use no. 16 AWG insu-
lated wire (35 C minimum). For over 75 ft, use no. 14 AWG
insulated wire (35 C minimum). All wire larger than no. 18
AWG cannot be directly connected to the thermostat and will
require a junction box and a splice at the thermostat.
ELECTRIC RESISTANCE CRANKCASE HEATER — The
crankcase heater is inserted into the compressor crankcase. The
crankcase heater is operated from the normally closed contacts
of the control relay (CR1) and is automatically energized when
compressor stops. This heater keeps crankcase warm to pre-
vent oil dilution by refrigerant, ensures good lubrication, and
minimizes loss of oil during start-up.
AIRFLOW SWITCH — Carrier recommends an indoor air-
flow switch (field supplied) be installed and interlocked with
the outdoor unit. This prevents the outdoor unit from operating
if indoor airflow fails (broken fan belt, etc.). Operation of the
compressor in vacuum can damage bearing surfaces. Install
indoor airflow switch in a convenient location at the indoor
supply air duct and wire per Fig. 11.
Table 7A — Electrical Data (3 Ph/60 Hz)
Table 7B — Electrical Data (3 Ph/50 Hz)
LEGEND *Units are suitable for use on electrical systems where voltage sup-
plied to the unit terminals is not below or above the listed limits.
NOTES:
1. MCA and MOCP values are calculated in accordance with NEC
(National Electric Code) (U.S.A. Standard), Article 440.
2. Motor RLA and FLA values are established in accordance
with UL (Underwriters’ Laboratories) Standard 1995 (U.S.A.
Standard).
Table 8 — Recommended Thermostats
LEGEND
*Thermostat kit includes Temp System relay pack.
†Subbase has ON-AUTO fan switch.
IMPORTANT: The common (COM) terminals from all
three fan coil relay boards must be connected to the ‘P’
terminal in condensing unit ‘A’.
38AQS
UNIT COMPRESSOR FAN MOTORS (Single-Phase)
Model
Volts
MCA ICF
MOCP
(Amps)
Fuse Only
RLA LRA
Total
Fans
FLA (ea)
Fan No.
Name-
plate
Supplied*
Min Max 12
012
501
601
101
208-230
460
575
187
414
518
253
528
660
62.5
29.1
22.8
178
81
65
100
40
35
43.6
20.0
15.7
170
77
62
2
4.3
2.3
1.8
3.7
1.9
1.8
016
501
601
101
208-230
460
575
187
414
518
253
528
660
87.5
40.7
33.0
274
124
100
125
60
50
63.6
29.3
23.8
266
120
96
2
4.3
2.3
1.8
3.7
1.9
1.8
38AQS
UNIT COMPRESSOR FAN MOTORS (Single-Phase)
Model
Volts
MCA ICF
MOCP
(Amps)
Fuse Only
RLA LRA
Total
Fans
FLA (ea)
Fan No.
Name-
plate
Supplied*
Min Max 12
012
800
900
230
400
198
342
264
457
47.5
31.4
134.4
80.4
75
50
32.9
20.0
128
74
2
3.5
3.5
2.9
2.9
016
800
900
230
400
198
342
264
457
66.9
43.0
206.4
121.4
100
60
47.9
29.3
200
115
2
3.5
3.5
2.9
2.9
FLA
—
Full Load Amps (fan motors)
ICF
—
Maximum Instantaneous Current Flow during start-up
(LRA of compressor plus total FLA of fan motors)
LRA
—
Locked Rotor Amps
MCA
—
Minimum Circuit Amps per NEC Section 430-24
MOCP
—
Maximum Overcurrent Protection (fuse only)
RLA
—
Rated Load Amps (compressor)
THERMOSTAT NO. 33CSTKT-01* 33CSTK--01* HH07AT172 (°F) HH07AT162 (°C)
SUBBASE NO. — — HH93AZ177† HH93AZ177†
Type Communicating, Programmable Standard
Display — °F or °C
XX
CCN Compatible
XX
2 Cooling Stages
XXXX
2 Heating Stages
XXXX
Auto Changeover
XXXX
Fan Switch
XXX† X†
Timeclock
X
Emergency Heat
XX
CCN
—
Carrier Comfort Network
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