3
LEGEND
NOTES FOR FIG. 1, 7
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:
HH07AT170, 172, 174, and P272-2783
Subbase:
HH93AZ176, 178, and P272-1882, 1883
3. Set heat anticipator at .14 amp for units with 2 stages of heating.
Set stage two anticipator at .14 amps.
4. Use copper conductors only.
5. 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 (RED). Insulate end of 230-v tap (ORN).
NOTES FOR FIG. 2, 5, 8, 10, 12, 15
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 amps.
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 (ORN) and connect
to 208-v (RED). Insulate end of 230-v tap.
NOTES FOR FIG. 3, 4, 6, 9, 11, 13, 14, 16, 17
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 amps.
5. Use copper conductors only.
AHA —
Adjustable Heat Anticipator
C—
Contactor, Compressor
CAP. —
Capacitor
CB —
Circuit Breaker
CC —
Cooling Compensator
COMP —
Compressor Motor
D—
Diode
DAT —
Discharge Air Thermistor
DX —
Direct Expansion
EC —
Enthalpy Control
ECON —
Economizer
EPS —
Emergency Power Supply
(Nine-Volt Battery)
EQUIP —
Equipment
ER —
Economizer Relay
FPT —
Freeze-Up Protection Thermostat
GND —
Ground
HPS —
High-Pressure Switch
HS —
Hall Effect Sensor
I—
Ignitor
IAQ —
Indoor Air Quality
IDM —
Induced-Draft Motor
IFC —
Indoor-Fan Contactor
IFM —
Indoor-Fan Motor
IFMOVL —
Indoor-Fan Motor Overload
IGC —
Integrated Gas Unit Controller
LED —
Light-Emitting Diode
LPS —
Low-Pressure Switch
LS —
Limit Switch
MGV —
Main Gas Valve
MTR —
Motor
OAT —
Outdoor-Air Thermostat
OFC —
Outdoor-Fan Contactor
OFM —
Outdoor-Fan Motor
OLR —
Overload Relay
P—
Plug
PL —
Plug Assembly
QT —
Quadruple Terminal
R—
Relay
RS —
Rollout Switch
SAT —
Supply-Air Thermostat
SEN —
Sensor
ST —
Start Thermistor
SW1 —
Switch Fully Open
SW2 —
Switch Fully Closed
SW3 —
Switch Minimum Vent Position
SW4 —
Switch Maximum Vent Position
TC —
Thermostat, Cooling
TDR —
Time-Delay Relay
TH —
Thermostat, Heating
TRAN —
Transformer
VVT —
Variable Volume/Variable Temperature
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.
Ground
|(
Capacitor
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