Carrier 48HDT - Manual (Page 23)

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TYPICAL WIRING DIAGRAM LEGEND
(48HD,LD008)
AHA — Adjustable Heat Anticipator PI - Plug Assembly
Assy — Assembly PS — Pilot Sensor
C
— Contactor Compressor QT - Ouadruple Terminal
CAP. — Capacitor RLC — Rotor Locking Circuit
CC — Cooling Compensator RS — Rollout Switch
CH — Crankcase Heater Std — Standard
CLO — Compressor Lockout Sw — Switch
CLS __ Cooling Lockout Switch TB — Terminal Block
COMP — Compressor Motor TC — Thermostat, Cooling
CS — Centrifugal Switch TDR — Time-Delay Relay
DM — Damper Motor TH - Thermostat, Heating
DR — Damper Relay TRAN - Transformer
EC — Enthalpy Control
ECT — Economizer Thermostat Marked Wire
Equip
Fu — Equipment
Fuse
Denotes Connection Point Between
Gnd — Ground
Subbase and Thermostat
HPS — High-Pressure Switch
o
Terminal (Marked)
1 — Ignitor Electrode
IDM — Induced Draft Motor
o
□
Terminal (Unmarked)
IDR ___ Induced Draft Relay
Terminal Block
IFC — Indoor Fan Contactor
IFM — Indoor Fan Motor
•o
Field Splice
IFR — Indoor Fan Relay
IPP Ignitor Power Pack Splice (Marked)
L
LPS — Light
Low-Pressure Switch
—•— Factory Splice
LS Limit Switch Factory Wiring
MAT. — Mixed Air Thermostat Internal Connection
MGV
Mtr
NS __ Main Gas Valve
Motor
Night Setback Switch
__________
Accessory or Optional Wiring
— Field Control Wiring
OAT. — Outdoor Air Thermostat — —
Field Power Wiring
OFM — Outdoor Fan Motor To indicate common potential only,
PGV Pilot Gas Valve not to represent wiring
TYPICAL WIRING DIAGRAM NOTES
(48HD,LD008)
1. Compressor and fan motors are thermally pro­
tected — 3-phase motors are protected against
primary single-phasing conditions.
2. If any original wires must be replaced, use 90 C
wire or equivalent.
3. Numbers indicate the line location of used con­
tacts. A bracket over (2) numbers signifies a
single pole double throw contact. An underlined
number signifies a normally closed contact. Plain
(no line) number .^signifies a normally open
contact.
4. Must use thermostat HH07AT172 or 174 with
subbase HH93AZ177.
5. Set heat anticipators at one amp (208/230-3-60).
Set heat anticipators at 1.2 amp (460-3-60).
6. Factory connected to 230-v or 460-v lead per unit
rated voltage. If 208-v power supply is used,
connect to 200-v lead and insulate 230-v lead.
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