User Guide

Copyright 2008, 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.
F-12720-8
www.tac.com
TAC
1354 Clifford Avenue
P.O. Box 2940
Loves Park, IL 61132-2940
Requirements
The thermostat can be mounted in any position with one
spring for pipe or tubing up to 1/2” (13 mm) or 2 springs
hooked together for pipe or tubing up to 1-1/2” (38 mm).
CAUTION
Do not attempt to disassemble the thermostat as it is
hermetically sealed to prevent moisture condensation on the
electrical contacts
Procedure
On a smooth clean section of the pipe or tubing, hook one end
of the spring in the hole on the flange. Position the thermostat,
pull the spring around under the pipe, and hook the other end
in the hole on the opposite side of the flange. If installed on
insulated pipe, build up the insulation around and over the
thermostat only after it is installed.
Make all electrical connections in accordance with job
diagrams and in compliance with national and local electrical
codes.
Standard units are supplied with color coded leads for direct
connection to other equipment or spliced connections in a
nearby electrical enclosure.
Checkout
Expose the unit to a temperature below 62°F (17°C) and a
circuit must be made between yellow and red (TC-2931) or
between white and blue (TC-2942).
Expose the unit to a temperature above 88°F (31°C) and a
circuit must be made between yellow and blue (TC-2931) or
between white and black (TC-2942).
Maintenance
If excessive corrosion develops between the sensing
elements and the pipe, remove unit, clean, and apply a
silicone lubricant such as #6 compound from Dow Corning
Company to prevent future corrosion.
Repair
Do not field repair the thermostat. If the system is not
operating correctly and the reason is traced to the termmostat,
it should be replaced.
Red
Yellow (common)
Blue
Temp.
Drop
Blue
White(common)
Black
Temp.
Drop
TC-2931
TC-2942