White Rodgers 2B61-186 User's Manual
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
Printed in U.S.A.
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
2B61-186 Remote Bulb Thermostats are designed for use on a
wide variety of heating equipment and appliances, and are
especially suitable for electric heating. Extremely compact in
size, these snap-action thermostats are suitable for use on both
inductive and non-inductive loads.
When the temperature of the liquid or air surrounding the bulb
rises, the switch contacts open to turn off the heat. When the
temperature drops, the contacts close to turn on the heat.
INSTALLATION INSTRUCTIONS
TYPE 2B61-186
OUTDOOR HEAT PUMP
THERMOSTAT
PRECAUTIONS
To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box, until installation is complete.
CAUTION
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.
SPECIFICATIONS
Switch Action: Open on rise, snap-action
Contact Structure: – S.P.S.T.
Temperature Range : 0
° to 50°F (-18° to 10°C)
Differential: 6
°F (3°C) approx.
Maximum Ambient: 150
°F (66°C)
Temperature Switch:
Capillary: 48"
Electrical Rating
These controls have been accurately calibrated at the factory.
Any attempt to calibrate these controls voids the White-Rodgers
warranty.
The switch mechanism of this control may be mounted in any
location, provided that the temperature and humidity of the air in
which it is located do not cause a condensation on the switch
parts.
If the equipment manufacturer has made provisions for location
of the switch and control bulb, follow his instructions. If none are
provided, the following general rules should be observed:
NOTE
1. The control bulb should be located in an area of average
temperature of the medium being controlled.
When used to sense air temperature (as in an electric
heater) the bulb should be located so that the return air to the
heater flows freely over the bulb. The bulb should be fas-
tened away from the cabinet of the heater so that it senses
air temperature, and not cabinet temperature.
When used to control a liquid bath, be sure that the bulb is
fully immersed in the liquid. Also be sure that the bulb is
located where it can sense average temperature of the liquid.
In this regard, do not locate the bulb too close to the heating
element.
INSTALLATION
INDUCTIVE RATING
NON-INDUCTIVE
RATING
FULL LOAD
LOCKED ROTOR
120V
240V
120V
240V
120V
240V
25A
25A
10A
6A
60A
36A
Operator: Save these instructions for future use!
WHITE-RODGERS
PART NO. 37-3528B
Replaces 37-3528
9551
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