SPDT Heating/Cooling Room Thermostat
Operator: Save these instructions for future use!
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
These room thermostats are specially designed to control
combination heating and cooling equipment that operates on
These controls are suitable for fans or water solenoids on
heating/cooling convectors or any similar application that re-
quires a heavy duty room thermostat with single pole, double
throw (SPDT) switch action.
If in doubt about whether your wiring is millivolt, line, or low
voltage, have it inspected by a qualified heating and air condi-
tioning contractor or electrician.
To prevent electrical shock and/or equipment damage
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
Do not exceed the specification ratings.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dan-
This control is a precision instrument, and should be handled
the control to malfunction.
Following installation or replacement, follow appli-
ance manufacturer’s recommended installation and/
or service instructions to insure proper operation.
This control has been accurately calibrated at the factory. Any
attempt to calibrate this control will void the White-Rodgers
Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could cause
shock or fire hazard.
Open on rise
A.C. Motor Rating 120 VAC 240 VAC
Full Load Current
Locked Rotor Current 44.5 A
Non-Inductive 24 A
Close on rise
These controls have a single pole, double throw (SPDT) snap
action switch. The top left-hand terminal (red) is the common
terminal. The top right-hand terminal (blue) has open-on-rise
switch action. The bottom center terminal (white) has close-on-
rise switch action.
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
PART NO. 37-0885B
Printed in U.S.A.