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TH108-A-347S3

      400-108-001-C                    1/29/07                    1/2

This thermostat can be used to control an electric heating system
such as a baseboard heater, a radiant ceiling, a radiant floor, a con-
vector, etc.
The thermostat cannot be used with the following:

a resistive load under 2 A

a resistive load over 12.5 A

a system driven by a contactor or a relay (inductive load)

a fan-forced heating system (e.g.: fan-forced convector)

a central heating system

SUPPLIED PARTS

One (1) thermostat

Two (2) 6-32 mounting screws

Two (2) solderless connectors

TURN OFF POWER OF THE HEATING SYSTEM AT THE MAIN
POWER PANEL TO AVOID ELECTRIC SHOCK.

Loosen the screw holding the control module to the base. The screw
cannot be completely removed. Lift the control module to remove it
from the base.

Make the appropriate connections. Please note that the thermostat
wires are non-polarized; either wire can be connected to either termi-
nal.

NOTE: 

 All cables and connections must conform to the local electri-

cal code. Special CO/ALR solderless connectors must be used when
connecting with aluminium conductors.

Align and affix the base to the
electrical box.

NOTE

: Before installing the

thermostat base, install pro-
vided adapter plate (U-shaped)
on 347V electrical box which is
bigger than regular electrical
boxes.

Set the switch at the back of the remov-
able part of the thermostat to °C or °F.

Replace the front part of the thermostat
on the base and secure it in place with
the screw.

NOTE

: Keep the air vents of thermostat

clean and unobstructed at all times.

n

Description

1.

o

Installation

2.

Temperature 
display 

Percentage of 
heating time *

Temperature 
adjustment 
buttons

* The thermostat displays the percentage of heating time required to 
maintain the desired temperature. For example,   is displayed when 
heating is activated 40 percent of the time.

2-wire installation

4-wire installation

TH108-A-347S3

User Guide

Electronic Thermostat

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