Typical Control Wiring Schematic - Carrier 38AQS008 Product Data

Typical control wiring schematic

AHA — Adjustable Heat Anticipator
AWG — American Wire Gage
C — Contactor Compressor
CAP — Capacitor
CB — Circuit Breaker (Compressor)
CC — Cooling Compensator
CH — Crankcase Heater
CLO — Compressor Lockout
CLO1 — Compressor Lockout
CLO2 — Crankcase Heater Lockout
COMP — Compressor Motor
COTP — Compressor Over Temperature Protection
CR — Control Relay
CT — Current Transformer
— Compressor Time Delay
CTD
DB — Defrost Board
DFR — Defrost Relay
DFT — Defrost Thermostat
DIR — Defrost Interlock Relay
— Defrost Timer
DT
DU — Dummy Terminal
EQUIP — Equipment Ground
GND
FCPS — Fan Cycling Pressurestat
— Full Load Amps
FLA
FU — Fuse
HC — Heater Connector
HPS — High-Pressure Switch
HR — Heater Relay
1. If any of the original wire furnished must be replaced, it must be
replaced with type 90 C wire or its equivalent.
2. Thermostat: HH07AT171
Subbase: HH93AZ188
3. Set heat anticipator at .6.
4. Use copper conductors only.
1. Compressor and fan motor(s) thermally protected. Three-phase
motors are protected against primary single-phasing conditions.
2. If any of the original wire furnished must be replaced, it must be
replaced with type 90 C wire or its equivalent.
3. Terminal block 2 (TB2) is for field external control connections,
Class 2 wiring. Supply voltage at TB2 is 24 vac. Maximum power
available at TB2 is 31.5 va.
4. Field-supplied component ratings: IFC sealed coil rating (24 vac)
12 va max.
5. Must use thermostat HH07AT172 with subbase HH93AZ177.
6. Use copper, copper-clad aluminum, or aluminum conductors for
field power supply only.
7. Insulate unused lead when changing tap for 208 volt use.
8. The CB must-trip amps are equal to or less than 140% FLA.
9. Set thermostat heat anticipator(s) for first stage .79; for second
stage .63.
10. The CLO locks out the compressor to prevent short cycling on com-
pressor overload and safety devices. Before replacing CLO, check
these devices.
LEGEND
HTR — Heater
IFC — Indoor-Fan Contactor
IFM — Indoor-Fan Motor
IP — Internal Protector
L — Light
LCS — Loss-of-Charge Switch
LLS — Liquid Line Solenoid
LLSV — Liquid Line Solenoid Valve
LOR — Lockout Relay Switch
— No-Dump Reversing Valve Relay
NDR
NEC — National Electrical Code
OFC — Outdoor-Fan Contactor
OFM — Outdoor-Fan Motor
OFR — Outdoor-Fan Relay
OIL SOL — Oil Return Solenoid
OL — Overload Relay
OPS — Oil Pressure Safety Switch
PCB — Printed Circuit Board
QT — Quadruple Terminal
— Reversing Valve Relay
RVR
RVS — Reversing Valve Solenoid
SOL — Solenoid
SW — Switch
TB — Terminal Block
TC — Thermostat — Cooling
TGD — Time Guard® Device
TH — Thermostat — Heating
TRAN — Transformer
T'STAT — Thermostat
NOTES (38AQS008 Unit)
5. Three-phase motors are protected under primary single-phasing
conditions.
6. 39 va available for field installed accessories. Control power require-
ment for heat pump condensing unit is 36 va (sealed). Supplied
control transformer is 75 va.
NOTES (38AQS012,016 Units)
11. Remove jumper between RC and RH.
12. Defrost cycle time is factory set at 30 min.
38AQ012530
38AQ016530
U — Unloader
UR — Unloader Relay
MODEL
VOLTS
NUMBER
Heineman
47-100-76
208/230
47-100-91
COMPRESSOR DELAY
CTD
(T1,T2)
T
0 .5 SEC.
C1 C1
CLOSES OPENS
(TSTAT)
DEFROST CYCLE
DFT OPEN
OPEN
OF1,OF2 DE-ENERGIZED
RVS DE-ENERGIZED
T=30
0 T
T=50
LAST DEFROST
T=90
CYCLE
Terminal (PCB, Field)
Terminal (PCB, Factory)
Terminal Block Connection
Terminal (Unmarked)
Terminal (Marked)
Field Splice
Factory Splice
Splice (Marked)
Factory Wiring
Field Control Wiring
Accessory or Optional Wiring
Field Power Wiring
PCB Run
COMP DB
MFG. PT NO. Must
Trip
Airpax
Amps
209-3-2599-410 61
209-3-2599-378 89
T+5 MIN.
OPEN
DE-ENERGIZED
T+10 MIN.
MAXIMUM
29