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.
These room thermostats are especially designed for controlling
heating equipment operating on line voltage with heavy electrical
loads. They are suitable for operation of unit heaters, boilers,
furnaces, electric heaters, etc., or any similar application requir-
ing a heavy duty room thermostat.
These thermostats are ideal for use in public places where it is
desirable to have a tamper-proof control to prevent unauthorized
temperature adjustment.
The dial is inside the special locked case which requires use of
a special wrench to remove case from mounting plate to change
temperature setting.
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.
The proper location of a heavy duty room thermostat is very
important to assure good performance. The following general
rules will help in determining the proper location:
1. Make sure that it is in a place where air circulates around it
freely. This is important.
2. Never install it on or near an outside wall.
3. Keep it away from windows or doors.
4. Don't locate it too close to a strong light or any other false
source of heat such as direct sunlight, steam lines, etc.
5. Mount it on a post or a partitioning wall, but make sure that
there are no pipes or duct work in that wall or directly behind it.
6. If the electrical conduit leads into a cooler or a warmer room,
plug up the space around the wires in the conduit with rock
wool.
To prevent electrical shock and/or equipment damage,
disconnect electric power to system, at main fuse or
circuit breaker box, until installation is complete.
Do not use on circuits exceeding specified voltages.
Higher voltages will damage control and could cause
shock or fire hazard.
The mounting plate for this thermostat has two
holes 3
standard switch box.
white-rodgers.com
1
emersonclimate.com
TYPE 152
Room Thermostats
Heating Service, Internal Dial
INSTALLATION INSTRUCTIONS
DESCRIPTION
9 0
7 0
8 0
5 0
6 0
4 0
PRECAUTIONS
CAUTION
!
WARNING
!
INSTALLATION
CONCRETE
PLASTER
JUNCTION BOX
THERMOSTAT
CONDUIT
INSIDE WALL
CONDUIT
ALONG WALL
WALL INSTALLATION
/
"apart for attaching the control on a
5
16
Figure 1
PART NO. 37-1117D
Replaces 37-1117C
1539