5 33-00135EFS—07
Fig. 3. Terminal Designations for Boiler.
M35656A
J
R
C
Y
O/B
T
D
L
S1
S1
TERMINALS FOR 10K OHM TEMPERATURE SENSOR. CAN BE USED FOR FREEZE PROTECTION IN THE CASE OF THE THERMOSTAT
LOSING THE SIGNAL TO THE ERM. SENSOR MUST REMAIN INDOORS TO BE USED FOR FREEZE PROTECTION.
TERMINAL FOR HEAT CALL.
TERMINALS FOR 24VAC POWER.
TERMINAL FOR JUMPER. JUMPER BETWEEN J AND R SHOULD BE REMOVED FOR BOILER USE.
TERMINAL DESIGNATIONS FOR BOILER
Y2
T
TERMINAL FOR HEAT CALL.
NOTE: ERM WILL NOT SUPPORT SERIES20 OPERATION. WHEN CONFIGURED AS A BOILER, THE Y RELAY SHALL BE OFF AT ALL TIMES.
33-00135EFS_D.book Page 5 Friday, September 8, 2017 1:59 PM
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