66396-YIM-C-1004
Unitary Products Group
11
FIGURE 5 - TYPICAL FIELD WIRING
W2
RC
RH
Y1
Y2
W1
G
C
X1
X3
X4
A1
A2
T
T
W2
Y1
Y2
W1
G
C
OCC
X
R
THERMOSTAT
1
TERMINALS
UNIT CONTROL
BOARD
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.
24 Volt
Transformer
2
TO REMOTE SENSOR
2ET04701324 IF USED
O C C
W 1
W 2
Y 1
G
Y 2
X
R
S D
C
R
E
M
O
TE
M
IN
P
O
S
W 1
W 2
Y 1
G
Y 2
C
U N I T C O N T R O L
B O A R D
T - S T A T
R H
R C
The thermostat must provide a “G” sig-
nal when there is a call for “W1.”The
unit control board will energize the
indoor blower when the compressors
are energized; however, if the thermo-
stat calls for “W2” during the anti-short-
cycle delay, the electric heat (when
installed) will be energized immediately
upon the call for “W2.”
