User's Manual

CentraLite EMS
Operations, Maintenance & Service Manual
Page 22 of 31
Replacement of the Thermostat:
Figure 4 shows the backplate for the Thermostat, with the terminals labeled:
Figure 4 - Thermostat Backplate and Terminal Labels
Standard Universal Connection
R
C
Y1
G
G3
W2
G2
W1
B/0
Y2
G1
24VAC
Common
Cool / First Stage
Cool
Fan / High
Speed Fan
Second Stage
Heat / Medium
Speed Fan
Heat / Reversing
Valve
Second Stage Cool /
Low Speed Fan