Carrier 48TJD User Manual
Page 50
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 534-774
Printed in U.S.A.
Form 48TJ-18SI
Pg 50
10-00
Replaces: 48TJ-16SI
Book 1
4
Tab
1a 6a
Copyright 2000 Carrier Corporation
LEGEND FOR FIG. 56 — TYPICAL WIRING SCHEMATIC AND COMPONENT ARRANGEMENT
IMPORTANT: Refer to unit wiring label for actual unit wiring information.
AHA
— Adjustable Heat Anticipator
BR
— Burner Relay
C
— Contactor, Compressor
CAP
— Capacitor
CC
— Cooling Compensator
COMP — Compressor Motor
CR
— Combustion Relay
ECON — Economizer
EQUIP — Equipment
FPT
— Freeze-Up Protection Thermostat
GND
— Ground
GVR
— Gas Valve Relay
HPS
— High-Pressure Switch
HS
— Hall-Effect Sensor
HV
— High Voltage
I
— Ignitor
IDM
— Induced-Draft Motor
IFM
— Indoor (Evaporator) Fan Motor
IGC
— Integrated Gas Unit Controller
LED
— Light-Emitting Diode
LPS
— Low-Pressure/Loss-of-Charge Switch
LS
— Limit Switch
MGV
— Main Gas Valve
MTR
— Motor
OFM
— Outdoor (Condenser) Fan Motor
PL
— Plug Assembly
QT
— Quadruple Terminal
R
— Relay
RS
— Rollout Switch
SAT
— Supply Air Thermostat
SEN
— Sensor
SW1
— Switch Fully Open
SW2
— Switch Fully Closed
SW3
— Switch Min. Vent Position
SW4
— Switch Max. Vent Position
TC
— Thermostat-Cooling
TH
— Thermostat-Heating
TRAN — Transformer
Field Splice
Marked Wire
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Splice (Marked)
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
To indicate common potential only.
Not to represent wiring.
NOTES:
1. If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its equivalent.
2. Three-phase motors are protected under primary single-phasing conditions.
3. Thermostat: HH07AT170, 172, 174 and P272-2783
Subbase: HH93AZ176, 178 and P272-1882, 1883
4. Set heat anticipator at .14 amp. For units with 2 stages of heating, set stage two anticipator at .14 amp.
5. Use copper conductors only.
6. TRAN is wired for 230-v unit. If unit is to be run with 208-v power supply, disconnect BLK wire from 230-v tap
and connect to 208-v tap.