TH104PLUS 400-104-004-D 2008-01-29 1/4
TH104PLUS

User Guide

Programmable Thermostat

The TH104PLUS thermostat can be used to control an electric
heating system such as a baseboard heater, a radiant floor, a radiant
ceiling, a convector or a fan-forced heater.
The thermostat cannot be used with the following:
• a resistive load under 2 A
• a resistive load over 14.6 A
• systems driven by a contactor or a relay (inductive load)
• central heating systems
SUPPLIED PARTS
• One (1) thermostat
• Two (2) 6-32 mounting screws
• Two (2) solderless connectors
TURN OFF POWER TO THE HEATING SYSTEM AT THE MAIN
POWER PANEL TO AVOID ELECTRICAL SHOCK.
All cables and connections must comply with local electrical
codes.
This thermostat has tinned copper wires for line and load con-
nections. Special CO/ALR solderless connectors must be used if
these wires will be connected to aluminium conductors.
Install the thermostat onto an electrical box.
Install the thermostat about 5 feet high, on an inside wall facing
the heater.
Avoid locations where there are air drafts (such as the top of a
staircase or an air outlet), dead air spots (such as behind a
door), or direct sunlight.
Do not install the thermostat on a wall that conceals chimney or
stove pipes.
The thermostat wires are not polarized; either wire can be con-
nected to the load or to the power supply.
1) Connect the thermostat
Connect the thermostat wires to the power and to the load using
solderless connectors for copper wires.
nDescription
1.
oInstallation
2.
Period no. in
Automatic mode
Temperature
Heating power
indicator
Time and day
Manual
mode
Automatic
mode
Economy
mode
Setting no. in
Economy mode
Appears during
a power failure
Appears when the
setpoint is displayed
Flashes when the
clock has been reset
Up/Down buttons
Mode button
Day button
Hour button
Program button
Return button
Reset opening
Minute button
Appears if the
thermostat is configured
for a fan-forced heater
4-wire installation
2-wire installation
400-104-004-D (TH104PLUS) ENG.fm Page 1 Tuesday, January 29, 2008 4:21 PM