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292447-YIM-A-0507
Unitary Products Group 17
Thermostat Wiring
The thermostat should be located on an inside wall
approximately 56 inch above the floor where it will not be
subject to drafts, sun exposure or heat from electrical fixtures or
appliances. Follow the manufacturer's instructions enclosed
with thermostat for general installation procedure. Seven (7)
color-coded, insulated wires should be used to connect the
thermostat to the unit. Refer to Table 7 for control wire sizing
and maximum length.
Figure 23: Typical Low Voltage Field Wiring
Table 7: Control Wire Sizes
Wire Size Maximum Length
1
1. From the unit to the thermostat and back to the unit.
18 AWG 150 Feet
THERMOSTAT
1
TERMINALS
( RCB )
REHEAT
CONTROL BOARD
RC
RH
Y1
Y2
W1
W2
G
C
X1
X3
X4
A1
A2
T
T
R
Y1
Y2
W1
W2
G
C
OCC
HUM
1
2
3
4
HUM
TERMINAL BLOCK
RH
3
2
1
Electronic programmable Thermostat 2ET0770010024
( includes subbase).
2
Terminals A1 and A2 provide a relay output to close the
outdoor economizer dampers when the thermostat
switches to the set-back position.
3
TO REMOTE SENSOR
2ET04701324 IF USED
DEHUMIDISTAT
Dehumidistat closes on rise in humidity.
RC
RH
Y1
Y2
G
W1
W2
C
C
W2
W1
G
Y2
Y1
R
OCC
( RCB )
REHEAT
CONTROL
BOARD
HUM
TERMINAL
BLOCK
RH
1
1
2
3
4
1
DEHUMIDISTAT
Dehumidistat closes on rise in humidity.
TYPICAL
THERMOSTAT