Honeywell T4M Programmable Modulating Thermostat Installation Guide

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T4M Thermostat  

Programmable Modulating Thermostat  

OpenTherm Boiler  

Thermostat  

EN  

Quick Start Installation Guide  

A

B

C

Compatible with OpenTherm appliances only.  

Not compatible with 230V boilers, zone valve  

applications or 230V electric heating.  

OpenTherm  

Communication  

T

T

S

S

Installation in 3 steps...  

Wire the  

Thermostat  

Power Up  

and Test  

Configure  

the System  

Polarity free  

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3

OT OT  

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T

S

S

OpenTherm  

Boiler  

To prevent a short circuit from a loose wire -  

Must be installed by a competent person.  

• When using multi-core cables: Only remove enough outer  

insulation to allow secure fixing of the cores into the terminal block.  

To ensure your safety make sure the mains power  

is switched OFF before accessing wiring.  

• When using single core cables: Secure them together with  

a cable tie as close as possible to the terminal block.  

32318058-001 B  

Wire the Thermostat  

Power Up and Test  

Power Up the Heating System and do a quick functional test  

on the thermostat to check that it switches the boiler.  

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2

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.  

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.  

1.2-1.5m  

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.  

A) Separate the wallplate from  

the thermostat, and using a  

screwdriver open the wallplate  

terminal cover to connect wires.  

B) Connect wires according  

to wiring diagrams and  

clip the cover closed.  

A

B

C

T

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max 6mm  

min 0.25mm²  

max 1.5mm²  

https://manual-hub.com/  

VIEW FULL SCREEN PDF MANUAL

General	Details
Name	Honeywell T4M Programmable Modulating Thermostat Installation Guide
Make	Honeywell
Language	English
Filetype	PDF (Download)
File size	0.14 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• Honeywell

Honeywell T4M Programmable Modulating Thermostat Installation Guide Overview

Summary of Contents

• Page 1: T4M thermostat Programmable modulating thermostat Compatible with OpenTherm appliances only. Installation in 3 steps: wire the thermostat, power up and test, configure the system. Must be installed by a competent person. Ensure mains power is switched OFF before accessing wiring. Find a suitable wall location away from draughts and heat sources. Perform a quick functional test on the thermostat to check that it switches the boiler. Connect wires according to wiring diagrams. Secure single core cables together with a cable tie as close as possible to the terminal block.
• Page 2: Configure the system Specific settings for the thermostat and heating system can be configured in the advanced menu. Press and hold buttons together until the display changes (approx. 3 seconds). Number of periods per day Wired remote sensor Fail safe mode Press button to exit advanced menu and save any changes. What’s happening? How to fix it... Check heating system is powered. Faulty wiring connection - Check wiring at thermostat and boiler terminals. Replace thermostat or check wiring to remote temperature sensor if fitted. Conforms to protection requirements of the following directives: EMC: 2014/30/EU and LVD: 2014/35/EU. At the end of the product life dispose of the packaging and product in a corresponding recycling centre.