White Rodgers 2A37-1 Heavy Duty Space Thermostats Installation Instruction
Printed in U.S.A.
INSTALLATION INSTRUCTIONS
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
This Hydraulic-Action temperature control is readily ap-
plicable for many types of commercial or industrial heat-
ing applications.
plicable for many types of commercial or industrial heat-
ing applications.
The speed of response of the temperature sensitive
element makes it particularly applicable to warehouses,
factories, garages and similar installations.
element makes it particularly applicable to warehouses,
factories, garages and similar installations.
TYPE 2A37
HEATING
TEMPERATURE CONTROL
Adjustable Differential
When the temperature in the controlled area rises, the
fluid in the coiled element expands, causing the contacts
in the switch mechanism to snap open, turning off the
heating system.
fluid in the coiled element expands, causing the contacts
in the switch mechanism to snap open, turning off the
heating system.
As the air cools in the controlled area, the fluid in the coiled
element contracts. When the temperature drops to the
control setting, the contacts snap closed turning on the
heating system.
element contracts. When the temperature drops to the
control setting, the contacts snap closed turning on the
heating system.
PRINCIPLE OF OPERATION
SPECIFICATIONS
ELECTRICAL DATA
Switch Action:
S.P.S.T. - Open on Rise
THERMAL DATA
Range: 20
°
to 90
°
F (-7
°
to 32
°
C)
Differential: 3
°
to 20
°
F (1.7
°
to 11
°
C) Adj.
WARNING
To prevent electrical shock and/or equipment
damage, disconnect electric power to system at
main fuse or circuit breaker box until installation
is complete.
damage, disconnect electric power to system at
main fuse or circuit breaker box until installation
is complete.
Do not use on circuits exceeding specified volt-
ages. Higher voltages will damage control and
could cause shock or fire hazard.
ages. Higher voltages will damage control and
could cause shock or fire hazard.
CAUTION
THESE CONTROLS MUST BE INSTALLED BY A
QUALIFIED INSTALLER.
QUALIFIED INSTALLER.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical
codes and ordinances.
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.
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 calibrate this control will void the White-
Rodgers warranty.
Any attempt to calibrate this control will void the White-
Rodgers warranty.
PRECAUTIONS
WHITE-RODGERS
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS RD., ST. LOUIS, MO. 63123
(314) 577-1300, FAX (314) 577-1517
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
(905) 475-4653, FAX (905) 475-4625
PART NO. 37-1122B
Replaces 37-1122 & 37-9082
9548
Operator: Save these instructions for future use!