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13
TYPICAL WIRING SCHEMATICS (cont)
LEGEND
AHA —
Adjustable Heat Anticipator
BKR W/AT —
Breaks with Amp Turns
C —
Contactor Compressor
CC —
Cooling Compensator
CLO —
Compressor Lockout
COMP —
Compressor Motor
CT —
Current Transformer
EQUIP —
Equipment
GND —
Ground
HPS —
High-Pressure Switch
IFC —
Indoor-Fan Contactor
IFM —
Indoor-Fan Motor
IFR —
Indoor-Fan Relay
JB —
Junction Box
L —
Light
LOR —
Lockout Relay
LPS —
Low-Pressure Switch
NEC —
National Electrical Code
OFM —
Outdoor-Fan Motor
PL —
Plug Assembly
PRI —
Primary
TB —
Terminal Block
TC —
Thermostat-Cooling
TH —
Thermostat-Heating
TRAN —
Transformer
Marked Wire
Denotes connection point between
subbase and thermostat
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Field Splice
Splice (Marked)
Factory Splice
Factory Wiring
Accessory or Optional Wiring
Field Control Wiring
Field Power Wiring
To indicate common potential
only, not to represent wiring
502A048,060, 575-3-60 Units
NOTES:
1. Compressor and fan motors are thermally protected, three-phase
motors protected against primary single-phase conditions.
2. If any original wires furnished must be replaced, it should be
replaced with 90 C or its equivalent.
3. Numbers indicate the line location of used contacts. 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 HH07AT170, 172 or 174 with subbase
HN63AZ176, 177 or 179.
5. Neutral for 240/416 v supply (Canada only).
6. The CLO locks out the compressor to prevent short cycling on
compressor overloads and safety devices, before replacing CLO
check these devices.