L__Y-01 SERIES
TPI CORPORATION
PO BOX 4973
JOHNSON CITY, TN 37602
INSTALLATION INSTRUCTIONS
APPLICATION
The L series are designed for use as operating or regulating controls only. Where control failure could result
in personal injury or the loss of property, an approved backup temperature limit control or an advisory alarm system
should be used to warn of control failure.
Model
Description
Operation
L__Y-01
Heat or Cool SPDT
Opens N.C. circuit on temp. rise/closes N.O. circuit on temp rise.
Electrical Ratings
25 AMP @ 125/240/480 Vac
3/4 HP @ 125 Vac
1 1/2 HP @ 240 Vac
*CAUTION*
Installation must be performed by an experienced, qualified service person.
Always disconnect power supply before performing any work.
Wire nut or otherwise insulate any unused conductors.
All wiring must conform to state and local codes.
Safety Information
1. Disconnect all power before installing or servicing.
2. Be certain that the electrical load that is to be controled does not exceed the thermostat rating.
3. This thermostat is intended for permanent installation and must be installed in accordance with the National
Elecric Code (NEC) and all state and local codes.
4. Use copper conductors only.
Installation
1. Locate the thermostat sensing bulb 4 to 6 FT. above the floor, where it will be exposed to an average temperature
of the controlled space. Do not mount near windows, doors or direct sunlight.
2. Remove the thermostat cover. Position the box with the wiring hole oriented as desired. Fasten the box to the wall
with 2-3 screws through the mounting holes.
3. The thermostat may be installed using conduit, flexible cable or other code approved wiring methods. All fittings
and materials used should be approved for the application and should be installed in accordance with instructions.
4. Complete the wiring by attaching the thermostat leads in accordance to the applicable wiring diagram using wire
nuts (not provided). A green groung wire is provided to attach the line and equipment groung to the thermostat.
After the connections are made, all wires should be pushed back into the box.
5. The thermostat cover should now be attached to the box using the screw provided.
Operation
After installation and wiring, check the operation in the following manner:
1. Adjust the thermostat set point to about 10 degrees below room temperature.
2. Restore power.
3. Slowly raise the set point of the thermostat. When the set point reaches room temperature, the heater should come
on.
Since the thermostat may be afffected by the installers hand, allow the necessary amount of time after handling before
performing operation check.
The L Series thermostats are factory calibrated and require no field adjustments. Changing the calibration will void the
warranty. Do not bend or damage the sensing bulb as this will afffect operation of the unit.
FORM 8051 REV. A
