Introduction
The TH147-P programmable thermostat can be used to control:
• a gas, fuel oil or electric furnace - 2 or 3 wires
• a central air conditioner - 2 or 3 wires
• a hot water system with or without pump - 2 wires
• a millivolt system - 2 wires
• a central heating and cooling system - 4 or 5 wires
Attention: This thermostat is not compatible with heat pumps or
multi-stage systems.
Display
Fan operating
System operating
mode selector
mode selector
Installation
Note: The installation must be performed by an electrician or a quali-
fied installer.
2.1
Removing the Old Thermostat
IN ORDER TO AVOID ANY RISK OF ELECTRIC SHOCK, CUT
POWER TO THE HEATING/COOLING SYSTEM.
Remove the old thermostat to access the wires.
Attention: If the old thermostat was mounted onto an electrical box,
it might have been powered by 120/240 volts. In this case, the
TH147-P thermostat cannot be used.
Identify and label each wire (with the corresponding letter on the
wire terminal) and remove them from the terminals.
If necessary, strip the end of each wire
(maximum of 6 mm).
Wrap the wires around a pencil to prevent
them from falling into the wall.
If the hole in the wall is too big, insulate it
using a non-flammable material in order to
avoid air draughts behind the thermostat.
TH147-P
Adjustment
buttons
Backlight
button
Programming
buttons
2.2
Installing the New Baseplate
1.
For a new installation, choose a location approximately 1.5 m (5
feet) above the floor and on an inside wall. Avoid draughty areas
(top of staircase, air outlet, etc), dead air spots (behind doors),
direct sunlight or areas near concealed pipes or chimneys.
Remove the thermostat faceplate.
Loosen the locking screw in order to separate the thermostat
from its baseplate (the screw cannot be completely removed).
Gently tilt the thermostat upwards.
Mark and bore the appropriate mounting holes (or use the
existing holes). Insert the plastic anchors.
Pass the wires through the opening of the baseplate and fix the
baseplate to the wall using the screws provided.
2.
2.3
Connecting the Thermostat
Refer to the following table for matching the wire labels with the
thermostat terminals.
Terminals
Rh
Heating power supply
Rc
Cooling power supply
W
Heating signal
Y
Cooling signal
G
Fan
Note: Do not connect wires identified as C, X or B. Wrap the bare
end of these wires with electrical tape.
Loosen the screws of the
terminal block and insert the
wires in the respective
terminals.
Tighten the screws.
Important: The red jumper wire
between Rh and Rc terminals must
be removed in a 5-wire installation.
TH147-P
Installation and User Guide
Programmable Thermostat
Description
Wire labels
Rh, R, 4, V
W, W1, H
Y, Y1, M
Rc, R
G, F
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