Typical Wiring Schematics - Carrier 50KQA Product Data

Typical wiring schematics

Power Supply
Refer to Data Plate
Use copper conductors only.
See Note 2
Refer to Disconnect
box for optional
power supply connection
Optional
Cord
Connection
1
YEL
2 2A
UMT
RED
PBS
2
3
3A
YEL
3
RED
GRY
BRN
1A 1
DM
PBS
ORG
YEL YEL
YEL
1B
YEL
BRN
WV
AL — Alarm Relay Contacts
BM — Blower Motor
BR — Blower Relay
Cap — Capacitor
CO — Condensate Overflow
CR — Compressor Relay
DM — Damper Motor
FP1 — Sensor, Water Coil Freeze Protection
FP2 — Sensor, Air Coil Freeze Protection
HP — High-Pressure Switch
JW1 — Jumper Wire for Alarm
LOC — Loss of Charge Pressure Switch
PB — Power Terminal Block
PBS — Push Button Switch
— Reversing Valve Solenoid
RVS
Trans — Transformer
UMT — Unit Mounted Thermostat
— Unit Performance Monitor
UPM
WV — Water Valve
26
MANUAL CHANGEOVER WITH COMPLETE C CONTROLLER
Ground
Neutral on 265V Systems
L2
L1
L2 (ribbed)
Ground
L1 (plain)
Trans
BLK
ORG
24V
230V
SEE
NOTE 7
BR BRG CCG
BLU
C
Test Pins
YEL
R
BRN
Y
SEE
YEL NOTE 4
Y
JW3
W
FP1 Low Temp
O
ORG JW2
FP2 Low Temp
G
RED
R
C
JW1
AL1
AL2
BRN
SEE NOTE 6
Alarm
A
Relay
P1
LEGEND
----------
H
BLU
CAP
6 8
RED C
RED RED
CR
F
2 4
BLK BLK
2 B (HIGH)
BRN
BM
YEL
1 A (LOW)
BLK
5 5A
BLK
BRN
(265V)
6 6A
BLK
RED
SEE
7 7A
(208V)
NOTE 3
WHT PBS
(115V)
SEE
NOTE 7
1 0
CR
YEL
BRN
CC
Compressor
1 RED
Relay
HP
RED
2
3 BLU
LOC
BRN
4
Dip Switch
5 GRY
FP1
1 UPM
GRY
6
2
Not Used
Off On
7 VIO
FP2
VIO
8
BRN
9
Status
RV
G
LED
ORG
10
Not Used Not Used
C
CO 12
Microprocessor
P2
Control Logic
24V
DC
EH1
EH2
P3
CO
Field Line Voltage Wiring
Field Low-Voltage Wiring
Printed Circuit Trace
Optional Low Voltage
Wiring
Relay Contactor Coil
Solenoid Coil
Thermistor
Ground
Mate-N-Lock
Ground
PB
Cap
Compressor
S
R
C
Complete
C
UMT
RED
RED
BLK
PUSH BUTTON SWITCH ATTRIBUTES
X = CLOSED
TERMINALS 1 2
1A 1B 2A 3A 4A 5A 6A 7A 8A
STOP X O O
FAN ONLY X O O
LOW COOL O X X
HIGH COOL O X X
LOW HEAT X O O
HIGH HEAT X O O
HP
LOC
BLOWER MOTOR WIRING
UNIT SIZE
FP1
007
SEE
009
NOTE 4
012
FP2
015
019
RVS
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 solutions,
cut JW3 jumper.
5. Typical unit-mounted thermostat wiring shown.
6. 24 V Alarm Signal shown. For Dry Alarm Con-
tact, cut JW1 Jumper and Dry Contact will be
available between AL1 and AL2.
7. Transformer secondary ground via Complete C
board standoffs and screws to Control Box.
(Ground available from top two standoffs as
shown.)
CR
Transformer
PBS
O = OPEN
3 4 5 6 7 8
O O O O O O
O O X O O O
O O O X O O
O O O O X O
X X O X O O
X X O O X X
POLE A POLE B
5 3
5 3
5 4
4 3
4 3