OWNER’S GUIDE
69-2659EF-03
TH450 Non-Programmable Thermostat
1. DESCRIPTION
The TH450 thermostat is designed to control an electric
heating system such as a baseboard heater, a radiant ceiling,
a convector or a fan-forced convector.
This thermostat cannot be used with:
• a resistive load under 1.25 A
• a resistive load over 16.7 A
• a system driven by a contactor or a relay (inductive load)
• a central heating system
SUPPLIED PARTS
• One (1) thermostat
• Two (2) 6-32 mounting screws
• Two (2) solderless connectors
2. INSTALLATION
The installation must be carried out by an electrician and
must comply with local electrical codes.
WARNING
CUT POWER TO THE HEATING SYSTEM AT THE MAIN
ELECTRICAL PANEL TO AVOID ANY RISK OF
ELECTRICAL SHOCK.
Loosen the screw and remove the faceplate of the thermostat
from its wallplate.
NOTE:
The screw remains captive on the wallplate.
Make the connections using solderless connectors for
copper wires. The thermostat wires are non-polarized; this
means either wire can be connected to either terminal.
WARNING
This thermostat has tinned copper wires for line and load
connections. Special CO/ALR solderless connectors must be
used when connecting with aluminum conductors.
Install the wallplate to the electrical box.
Temperature
display
Temperature
adjustment
buttons
Keypad
lock
Heating intensity
Appears when the
thermostat is configured for
a fan-forced heater.
2-wire Installation
4-wire Installation
