25HCB6
Comfortt Series 2---Stage Heat Pump
with Puronr Refrigerant
2 To 5 Nominal Tons
Wiring Diagrams
CONNECTION
DIAGRAM
BLU
*SR
BRN
2 1
5
*CHS
*SC
BLK
*CH
BLK
or
RED
RED or BLK
L1
C
BLK
YEL
11
21
23
23
S
R
YEL
EQUIP GND
BLK
RED
BLK
BLU
RVSR
R
AUXR
W2
R
RED
CTD
30
ORN
PNK
R
CB
C Y O W2 R E L
PNK
DFT
INDOOR UNIT
TERMINAL BLOCK
G INDOOR THERMOSTAT (NOTE #5)
NOTES:
1. COMPRESSOR AND FAN MOTOR FURNISHED WITH INHERENT THERMAL PROTECTION.
2. TO BE WIRED IN ACCORDANCE WITH NATIONAL ELECTRIC CODE (N.E.C.) AND LOCAL CODES.
3. N.E.C. CLASS 2, 24 V CIRCUIT, MIN. 40 VA REQUIRED, 60VA ON UNITS INSTALLED WITH LLS.
4. USE COPPER CONDUCTORS ONLY FROM DISCONNECT TO UNIT.
5. MUST USE THERMOSTAT AND SUB-BASE AS STATED IN PRE-SALE LITERATURE.
6. IF INDOOR SECTION HAS A TRANSFORMER WITH A GROUNDED SECONDARY, CONNECT THE GROUNDED SIDE TO "C" ON THE CIRCUIT BOARD.
7. IF ANY OF THE ORIGINAL WIRE, AS SUPPLIED, MUST BE REPLACED, USE THE SAME OR EQUIVALENT WIRE.
8. CHECK ALL ELECTRICAL CONNECTIONS INSIDE CONTROL BOX FOR TIGHTNESS.
9. DO NOT ATTEMPT TO OPERATE UNIT UNTIL SERVICE VALVES HAVE BEEN OPENED.
10. USE CONDUCTORS SUITABLE FOR AT LEAST 75ºC (167ºF).
DIP SWITCH SETTINGS
30 MINUTES
2
3
1
OR
(DEFAULT)
90 MINUTES
60 MINUTES
2
3 60
1
2
OR
120 MINUTES
120
3
1
OR
90
2
3
ON
1
2
*DTS
* HPS
CTD
T2
CONT
C
LOGIC
NOTE
YEL WHT
BLK ORN RED
Y2
* LPS
C
HK32EA003
C Y O W2 R E L W3 G
* UTS
RVS
ORN
DFT
C Y O W2 R
T1
BRN/YEL
O
90
*CS
Y Y
C
SPEED
UP
60
LOGIC
YEL/BLU
T2
LOGIC
DFT
Y2 Y2
BLU / PNK
C
120
DFT
AUXR
LOGIC
C
RVSR
BLU / PNK
T1
SPEED
UP
O
YEL / PNK
OF2
OF
RVS
Y
1
OF1
* HPS
RED
DR
OF1
F
CAP
BLK
* DTS
YEL / PNK
OFM
DR
O
BLK
H
C
OFM
BRN/YEL
* UTS
* LPS
30
1
* SR
* CH
* ST
+t°
*SC
2
5
* CHS
YEL
YEL/BLU
CONT
23
23
S
EQUIP
GND
COMP
BRN
L2
COMP C R
CONT
11
21
BLK
*CS
BLK
BLU
F
SCHEMATIC DIAGRAM
(LADDER FORM)
L1
*ST +t
YEL
C
CONT
L2
208/230 1Ø
POWER
SUPPLY
H
BLK
BLK
BLU
CAP
YEL
3
QUIET
SHFT
OFF
(DEFAULT)
FIELD SELECTABLE OPTIONS FOR TIME PERIOD
BETWEEN DEFROST CYCLES (MINUTES)
JUMPERED TEST PINS (USE METAL OBJECT), FIELD SPEED-UP CYCLE
1) MOMENTARILY SHORT PINS AND RELEASE TO BYPASS COMPRESSOR OFF DELAY.
2) SHORT FOR 5+ SEC. AND RELEASE FOR FORCED DEFROST.
3) PERMANENT SHORT WILL BE IGNORED.
DEFROST WILL TERMINATE IN 30 SEC. IF DFT OPEN.
DEFROST WILL TERMINATE NORMALLY IF DFT IS CLOSED.
THIS DEFROST CONTROL BOARD CONTAINS A FIVE MINUTE SHORT CYCLE
PROTECTOR. A FIVE MINUTE DELAY WILL OCCUR BETWEEN COMPRESSOR
OFF/ON CYCLES.
-LEGEND-
FACTORY POWER WIRING
FIELD POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
CONDUCTOR ON CIRCUIT BOARD
COMPONENT CONNECTION
1/4 - INCH QUICK CONNECT TERMINALS
FIELD SPLICE
JUNCTION
PLUG RECEPTACLE
AUXR AUXILLARY HEAT RELAY
CAPACITOR (DUAL RUN)
CAP
CRANKCASE HEATER
*CH
*CHS CRANKCASE HEATER SWITCH
COMP COMPRESSOR
COMPRESSOR TIME DELAY
CTD
CONT CONTACTOR
CIRCUIT BOARD
CB
COMPRESSOR SOLENOID
*CS
DEFROST THERMOSTAT
DFT
DEFROST RELAY AND CIRCUITRY
DR
*DTS DISCHARGE TEMPERATURE SWITCH
*HPS HIGH PRESSURE SWITCH
*LPS LOW PRESSURE SWITCH
OFM OUTDOOR FAN MOTOR
REVERSING VALVE SOLENOID
RVS
RVSR REVERSING VALVE SOLENOID RELAY
START CAPACITOR
*SC
START RELAY
*SR
START THERMISTOR
*ST
*UTS UNLOADER TEMP SWITCH
* MAY BE FACTORY OR FIELD INSTALLED 335977-101 REV. A
Fig. 1 – Wiring Diagram — Model sizes 2--5 tons, 208/230--1
Copyright 2009 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231
Printed in U.S.A.
Edition Date: 09/09
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
2
Catalog No: 25HCB6---1W
Replaces: New