To prevent electrical shock and/or equipment
damage, disconnect electric power to system at
main fuse or circuit breaker box until installation
Label all wires prior to disconnection when ser-
vicing controls. Wiring errors can cause improper
and dangerous operation.
Following installation or replacement, follow
appliance manufacturers’ recommended instal-
lation/service instructions to insure proper op-
PART NO. 37-6133A
Printed in U.S.A.
This series of limit controls has a normally closed SPST
switch that opens on temperature rise to limit the maxi-
mum allowable temperature in forced air heating sys-
THIS CONTROL MUST BE INSTALLED BY A QUALI-
All wiring must conform to local and national electrical
codes and ordinances.
This control is a precision instrument, and should be
handled carefully. Rough handling or distorting compo-
nents could cause the control to malfunction.
This control has been accurately calibrated at the factory.
Any attempt to re-calibrate this control will void the White-
Do not use on circuits exceeding specified volt-
ages. Higher voltages will damage control and
could cause shock or fire hazard.
If in doubt about whether your wiring is millivolt,
low or line voltage, have it inspected by a quali-
fied heating and air conditioning contractor or a
tems. A small bimetal sensing element is located in the air
stream for quick response. These controls have a fixed
temperature setting and fixed differential.
Resistive: 15 amps @ 120 VAC
13 amps @ 240 VAC
9.3 amps @ 277 VAC
Inductive: 5.8 FLA, 34.8 LRA @ 120 VAC
2.9 FLA, 13.0 LRA @ 240 VAC
Pilot Duty: 278 VA
Fixed setting stamped on control
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
Operator: Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
This control must be mounted in the air stream of the
appliance. Follow the original equipment manufacturers’
recommendations for proper location and wiring.
All wiring must conform to local and national
electrical codes and ordinances.