Carrier 50KQA Product Data page 30

Typical wiring schematics (cont)
REMOTE-MOUNTED THERMOSTAT WITH COMPLETE C CONTROLLER
Power Supply
Refer to Data Plate
Use copper conductors only.
See Note 2
L2
Refer to Disconnect
box for optional
power supply connection
Optional
Cord
Connection
Trans
24V
Typical Heat Pump T-stat
SEE NOTE 5
Class 1 or 2
Wiring acceptable
outside control box
Y
O
G
R
C
L
BRN
WV
AL — Alarm Relay Contacts
BM — Blower Motor
BR — Blower Relay
Cap — Capacitor
Condensate Overflow
CO —
CR — Compressor Relay
DM — Damper Motor
FP1 — Sensor, Water Coil Freeze Protection
FP2 — Sensor, Air Coil Freeze Protection
Fan Speed Switch
FSS —
HP — High-Pressure Switch
JW1 — Jumper Wire for Alarm
LOC — Loss of Charge Pressure Switch
P1 — Field Wiring Terminal Block
Power Terminal Block
PB —
RVS — Reversing Valve Solenoid
Trans — Transformer
UPM Unit Performance Monitor
—
WV Water Valve
—
30
Neutral on 265V Systems
Ground
RED
PB
L1
L2 (ribbed)
Ground
L1 (plain)
BRN
BLK
(265V)
RED
ORG (208V)
230V WHT
(115V)
YEL
YEL
1
SEE
NOTE 7
YEL GRY
BR
BLU
BRN C
YEL
R
Class 1 Wiring
Y
required inside
control box
Compressor
Y
W
Cooling
O
Fan
G
24 VAC
R
Common
C
Alarm
AL1
AL2
SEE NOTE 6
Alarm
A
Relay
P1
YEL
LEGEND
----------
H
BLU
CAP
6 8
C RED RED
CR
F
BLK 2 4
BLK
2 B (HIGH)
BRN
BM
YEL
1 A (LOW)
COM NO 3
BLK BLK
RED
2
BR
BLK
1
SEE
FSS
NOTE 3
ORG
DM
BRN
0 1 0
BR CR
YEL
BRN BRN BRN
CC
BRG CCG
Test Pins
Compressor
Relay
SEE
NOTE 4
Dip Switch
JW3
1 UPM
FP1 Low Temp
2
Not Used
Off On
JW2
FP2 Low Temp
Status
G
LED
JW1
C
Microprocessor
Control Logic
CO
Field Line Voltage Wiring
Field Low-Voltage Wiring
Printed Circuit Trace
Optional Low Voltage
Wiring
Relay Contactor Coil
Solenoid Coil
Thermistor
Ground
Ground
PB
Cap
Compressor
S
R
C
Complete
C
SEE
NOTE 7
1 RED
(LOCATED IN COMPRESSOR COMPARTMENT)
HP
HP
RED
2
3 BLU
LOC
LOC
BRN
4
5 GRY
SEE
FP1
FP1
NOTE 4
6 GRY
7 VIO
FP2 FP2
VIO
8
BRN
9
RV
RVS
ORG
10
BLOWER MOTOR WIRING
Not Used Not Used
UNIT SIZE
CO 12 007
009
P2
012
24V
015
DC
019
EH1
EH2
P3
NOTES:
1. Compressor and Blower Motor thermally pro-
tected internally.
2. All wiring to the unit must comply with NEC
and local codes.
3. Transformer is wired to 115V (WHT) lead for
115/1/60 units, 265V (BRN) Lead for 265/1/
60 units or 208V (RED) Lead for 208/1/60.
For 230/1/60 switch RED and ORG Leads at
L1 and insulate RED lead. Transformer is
energy limiting or may have circuit breaker.
4. FP1 Thermistor provides freeze protection
for WATER. When using ANTI-FREEZE solu-
tions, cut JW3 jumper.
5. Typical heat pump thermostat wiring shown.
Refer to thermostat Installation Instructions
for wiring to the unit.
6. 24 V Alarm Signal shown. For Dry Alarm
Contact, cut JW1 Jumper and Dry Contact
will be available between AL1 and AL2.
7. Transformer secondary ground via Com-
plete C board standoffs and screws to Con-
trol Box. (Ground available from top two
standoffs as shown.)
CR
BR
Transformer
FAN SPEED SWITCH
1
2
3
POLE A POLE B
5 3
5 3
5 4
4 3
4 3