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32318058001 B
1
Wire the
Thermostat
2
Power Up
and Test
3
Configure
the System
T4M Thermostat
Programmable Modulating Thermostat
Quick Start Installation Guide
Compatible with OpenTherm appliances only.
Not compatible with 230V boilers, zone valve
applications or 230V electric heating.
Installation in 3 steps...
Must be installed by a competent person.
To ensure your safety make sure the mains power
is switched OFF before accessing wiring.
EN
OpenTherm
Communication
Find a suitable wall location away from draughts,
direct sunlight or other heat sources, and where cables
can be run from the boiler to the thermostat.
B) Connect wires according
to wiring diagrams and
clip the cover closed.
Wire the Thermostat
1
1.2-1.5m
OpenTherm Boiler
OpenTherm
Boiler
Thermostat
A
B
C
T
OT OT
T
S
S
To prevent a short circuit from a loose wire -
When using multi-core cables: Only remove enough outer
insulation to allow secure fixing of the cores into the terminal block.
When using single core cables: Secure them together with
a cable tie as close as possible to the terminal block.
Polarity free
Press the button to increase
the temperature to maximum and
check the boiler switches on
The heat demand icon on the
thermostat should be on.
Now press the button to decrease
the temperature to minimum and
check the boiler switches off
The heat demand icon on the
thermostat should also go off.
Power Up the Heating System and do a quick functional test
on the thermostat to check that it switches the boiler.
Power Up and Test
2
A) Separate the wallplate from
the thermostat, and using a
screwdriver open the wallplate
terminal cover to connect wires.
min 0.25mm²
max 1.5mm²
max 6mm
1


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Honeywell T4M User Manual - English - 16 pages

Honeywell T4M Installation Guide - German - 2 pages

Honeywell T4M User Manual - German - 16 pages


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