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White-Rodgers B50 Electric Heat Thermostat Installation Guide
B50
ELECTRIC-HEAT THERMOSTAT
(Double Line Disconnect)
INSTALLATION INSTRUCTIONS
FAILURETO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE IN-
STALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY
AND/OR PROPERTY DAMAGE.
DESCRIPTION
The B50 Electric Heat Thermostat is designed for use on all
types of electrical heating installations such as cable heat,
baseboards, wall insert heaters, etc.
50
60
40
70
TheB50 thermostatisintendedforuseon240or277VACwhere
local codes require that a double line disconnect thermostat
be used. This thermostat can also be used on 120 VAC. (See
specific wiring information for 120 VAC.)
OFF
80
Dial Setting: This thermostat may be set anywhere between
40° and 80°F by simply turning the knob so the indicator on
knob points to the desired setting.
The knob may be turned past 40° to the “OFF”position to obtain
temporary shutdown of the heating equipment for short periods
of time such as on weekends, vacation, etc. Turning knob to
“OFF” position will break both sides of line.
This Thermostat includes:
NOTE: Only one side of line is broken during normal cycling of
this thermostat.
•
Wall cover plate (required when thermostat will not hide wall
imperfections behind old thermostat)
Two cover mounting screws
•
•
Three Temperature Limiting Pins
PRECAUTIONS
This control is a precision instrument, and should be handled
carefully.Rough handling or distorting components could cause
the control to malfunction. Take care not to push or damage
the internal bimetal sensing element during installation.
WARNING
!
Do not use on circuits exceeding specified voltages.
Higher voltages will damage control and could cause
shock or fire hazard.
Do not use on inductive loads. Inductive (motor) loads
will damage control and could cause shock,fire hazard
or failure of thermostat.
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.
All wiring must conform to local and national electrical codes
and ordinances.
SPECIFICATIONS
Switch Rating: Non-Inductive
22A (5000W) 240VAC
19A (5000W) 277VAC
22A (2500W) 120VAC
Temperature Range: 40° to 80°F
Differential: 3.0°F
Switch Action: Open on rise
Contact Structure: Double Line Disconnect - DPST
PART NO. 37-7272B
1546
| General | Details |
|---|---|
| Name | White-Rodgers B50 Electric Heat Thermostat Installation Guide |
| Make | WHITE RODGERS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.13 MB |
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White-Rodgers B50 Manual: Questions and Answers
Can the White-Rodgers B50 be used on 120 VAC systems?
Yes. The thermostat is designed for 240 or 277 VAC where local codes require a double line disconnect, but it can also be used on 120 VAC with specific wiring connections. Installation Guide, p. 1
Where are the temperature limiting pins located on the White-Rodgers B50?
On the inside of the cover. Three pins come supplied, with one as a spare. Installation Guide, p. 2
What is the temperature range for the White-Rodgers B50?
40° to 80°F. Installation Guide, p. 1
How do I use temperature limiting pins on the White-Rodgers B50?
Temperature limiting pins protect the thermostat setting from unauthorized changes.
- Remove the cover from the thermostat.
- Press the small tapered end of a pin firmly into the inside of the cover at the approximate maximum temperature position.
- Press a second pin into the approximate minimum temperature position.
- Rotate the temperature knob to verify it sits between both pins.
- Replace the cover and install the supplied screws at the top and bottom to secure it.
- Check that knob rotation is limited as intended by the pins. Installation Guide, p. 2
What do the L1 and L2 terminals on the White-Rodgers B50 connect to?
L1 is the hot line connection, and L2 is the common or return line connection.
| Terminal | Connection |
|---|---|
| L1 | Hot line (power in) |
| L2 | Common line (return) |
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