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WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS RD., ST. LOUIS, MO. 63123
(314) 577-1300, FAX (314) 577-1517
9999 HWY. 48, MARKHAM, ONT. L3P 3J3
(905) 475-4653, FAX (905) 475-4625
WHITE-RODGERS
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
The White-Rodgers combination warm air limit and single
speed fan control combines into one compact case, a switch
which controls the fan or blower operation and also a switch
which acts as a safety limit control.
The fan switch is designed to control blower operation. It will
start the fan circulating warm air when the bonnet temperature
reaches the pre-determined temperature setting; stopping the
fan and when the bonnet temperature falls below the pre-
determined setting.
The warm air limit switch is designed to act as a safety switch
which automatically shuts off the burner when the furnace
temperature reaches a dangerously high point, regardless of
the cause.
The limit switch of these controls has special contacts which are
suitable for use on low voltage and millivolt (thermocouple
generator type) circuits as well as line voltage equipment such
as gas valves, oil burner motors, etc.
Printed in U.S.A.
DESCRIPTION
THESE CONTROLS MUST BE INSTALLED BY A QUALIFIED
INSTALLER.
Do not exceed the specification ratings.
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 components could cause
the control to malfunction.
This control has been accurately calibrated at the factory. any
attempt to calibrate this control will void the White-Rodgers
warranty.
WARNING
Do not use on circuits exceeding specified volt-
age. Higher voltage will damage control and could
cause shock or fire hazard.
CAUTION
To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
PRECAUTIONS
If the furnace manufacturer has made provision for, or recom-
mendations for location of this control, then follow those instruc-
tions. If not, the following suggestions should be observed.
The temperature sensitive bulbs should be positioned in the
furnace bonnet so that they will be located in the area which is
subjected to the most rapid temperature changes.
Avoid locations where there may be dead air spots or stratifica-
tion affecting free air circulation. Corners, sharp turns, baffles or
other obstructions usually cause these conditions. Do not locate
the control elements where the air-flow from the bonnet into any
single duct will control its operation.
INSTALLATION
Operator: Save these instructions for future use!
PART NO. 37-0874C
Replaces 37-0874-1 & 37-9098
9549
TYPE 5A75
FAN & LIMIT CONTROL
INSTALLATION INSTRUCTIONS