Honeywell T4M Programmable Modulating Thermostat Installation Guide
Configure the System
Parameters
No
3
Parameter
Number
Description
Settings (default in bold)
1 = EN, 2 = NL, 3 = DE, 4 = FR, 5 = ES
5 - 21 (°C)
Specific settings for the thermostat
and heating system can be
configured in the advanced menu.
Language
1:LA
Parameter
Setting
Lower Temperature Limit
Upper Temperature Limit
Schedule options
4:LL
5:UL
6:SO
Press and hold and then
buttons together until the display
changes (approx. 3 seconds).
21 - 35 (°C)
1 = 7 day (different schedule each day of the week)
2 = 5 + 2 day (weekday + weekend schedule)
3 = 1 day (same schedule every day)
Number of periods per day
Wired Remote Sensor
Fail Safe mode
4 or 6
7:NP
8:SS
B) Press and buttons to
change a parameter
A) Press
and
through the parameter list
buttons to navigate
0 = No Remote Sensor, 1 = Wired Remote Sensor
0 = Boiler off, 1 = Boiler 20% on / 80% off
0 = Off, 1 = On (only on demand)
0 = 24 hr, 1 = AM/PM
9:LC
Backlight
10:BL
11:CL
12:DS
13:TO
15:SD
16:FS
Clock Format
Daylight Saving time change
Temperature Display Offset
Restore Schedule Defaults
Restore Factory Settings
0 = Off, 1 = Auto
+/-1.5°C
0, 1 = reset
D) Press button to exit advanced
menu and save any changes
C) Press
(or press
button to save the change
to cancel the change)
0, 1 = reset
OpenTherm Data ID's
No
Troubleshooting
Description
Settings (default in bold)
What’s happening?
What it could mean...
No power to
heating system
How to fix it...
Thermostat
display is blank
Check heating system is powered
Low load control
0 = Off, 1 = On
5 - 99°C
O T1
Control setpoint
OT2
OT3
OT4
OT5
OT6
OT7
OT8
OT9
O T1 0
O T11
O T1 2
Faulty wiring connection Check wiring at thermostat
and boiler terminals
Supply water temperature
Return water temperature
Max. supply water temperature
Hot water temperature
Hot water setpoint
Actual power
5 - 99°C
5 - 99°C
Faulty temperature
sensor
Replace thermostat or check wiring to
remote temperature sensor if fitted
Display =
5 - 99°C
Thermostat shows
heat demand
but boiler doesn't
respond
Boiler (water) already
at temperature
Normal behaviour - wait for
water temperature to drop
5 - 99°C
5 - 99°C
Faulty wiring connection Check wiring at thermostat
and boiler terminals
0 - 99%
Water pressure
0.0 - 9.9
OTC control
0 = Off, 1 = On
4 - 40 (16)
0 = Off, 1 = On
OTC curve
Room compensation
Conforms to protection requirements of the following directives:
EMC: 2014/30/EU and LVD: 2014/35/EU
Honeywell Control Systems Ltd.
Skimped Hill Lane,
Bracknell,
Manufactured for and on behalf of the Environmental & Energy Solutions
Division of Honeywell Technologies Sàrl, ACS-E&ES, Z.A., La Pièce 16,
1180 Rolle, Switzerland by its Authorised Representative Honeywell Inc.
ErP: Class VI (+4%), (EU) 811/2013
Berkshire
RG12 1EB
WEEE Directive 2012/19/EC - Waste Electrical and Electronic Equipment directive
At the end of the product life dispose of the packaging and product in a corresponding recycling
centre. Do not dispose of the unit with the usual domestic refuse. Do not burn the product.
© 2016 Honeywell International Inc. | Printed in UK
| 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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