![background image](http://html.mh-extra.com/html/york/eco2-055/eco2-055_installation-operation-and-maintenance_912487128.webp)
YORK INTERNATIONAL
128
FORM 100.50-NOM1 (604)
Service
FIG. 53 –
THERMOSTAT INTERFACE BOARD (OPTIONAL)
00493VIP
T’STAT TERMINALS
FUNCTION
MOD DCU
CONNECTION
FUNCTION
R
24 VAC from controller
R
24 VAC from controller
Y1
COOL 1
TSAO
Analog voltage
Y2
COOL 2
TSAO
Analog voltage
W1
HEAT 1
TSAO
Analog voltage
W2
HEAT 2
TSAO
Analog voltage
G
Not Used
OCC
Not Used
SD
Not Used
P
Not Used
X
Not Used
C
Common
C
Common from controller
TABLE 32 – THERMOSTAT INTERFACE BOARD CONNECTIONS