Erie TA157-004 3-Wire Floating Thermostat ... - Industrial Stores

TAC
1354 Clifford Avenue
P. O. Box 2940
Loves Park, IL 61132-2940
www.tac.com
TA157 Series
TB157 Series
3-Wire FloatingThermostat/Controller
Installation Instructions
MOUNTING AND WIRING
Caution: Disconnect power supply and ensure that all
wiring complies with applicable codes and ordinances.
1. The T157 Series thermostats install with two furnished
mounting screws to a standard 4-11/16" x 2-1/8" square
device box with a 2" x 4" adapter ring.
2. For wall installations, mount the thermostat on an inside
wall approximately 5 ft. above the floor. The location
should provide circulation at average room temeprature.
Avoid direct sunlight or sources of hot or cold air in the
room or wall.
3. To remove cover, first set knob to mid span and remove.
Mount thermostat base assembly to the outlet box using
the screws provided. Tighten the screws evenly but do
not over tighten. Connect wires as shown in the
appropriate wiring diagram for your thermostat style.
4. To use a remote sensor on units with local sensing
capability, remove jumper JP-1 to disable local sensing.
Failure to remove JP-1 will cause improper operation of
the thermostat.
5. On units with cycling fan option, connect terminal 1
(SWITCHED POWER) to 6 (FAN SUPPLY) for
continuous fan operation, see Figure-1.
6. Reinstall the cover assembly. Install cover locking screw
if provided (see Figure-2). Reinstall the knob to complete
installation.
7. Checkout: After wiring and installation are complete,
energize the system and check the operation. Adjust the
thermostat as necessary to complete at least one cycle.
Be sure the thermostat and all other equipment are
functioning correctly.
Operation
TA157 Models: Heating/Cooling thermostats requiring a
switch for manual selection of HEAT-OFF-COOL. Some
models have an integral Fan Switch for manual selection of
fan speeds.
TB157 Models: Auto-Change Over Heating, Cooling
thermostat. Heat on to Cool on dead band is 5 F° nominal.
Some models have an integral system switch for selection of
fan speeds.
Models with SYSTEM Switches
TA157 Models: In the OFF position, all outputs are OFF
except with the Cycling Fan Option, the FAN output is
dependent on external connections.
HEAT POSITION: The thermostat controls the heat output.
COOL POSITION: The thermostat controls the cool output.
TB157 Models: Manual selection of ON and OFF. In the OFF
position, all outputs are OFF except with the Cycling Fan
Option, the FAN output is dependent on external
connections. In the ON position the thermostat controls either
the HEAT or COOL output w/o manual selection.
Models with FAN Speed Switches
Manual selection of HIGH, MEDIUM, or LOW fan speeds. In
units with the Cycling Fan Option, the Fan operation
(CYCLING vs CONTINUOUS) is determined by application
connections.
Printed in U.S.A. 1/07 © Copyright 2007 TAC All Rights Reserved. F-66048-1

Note: Specific models may vary in the number of connections
available. Terminal designations remain consistant between
models.
Copyright 2007, TAC
All brand names, trademarks and registered
trademarks are the property of their respective
owners. Information contained within this
document is subject to change without notice.
TAC
1354 Clifford Avenue
P.O. Box 2940
Loves Park, IL 61132-2940
F-66048-1
www.tac.com