Honeywell DT90 manual

Honeywell DT90
8.3 · 29
PDF manual
 · 8 pages
English
manualHoneywell DT90

EN0H 8578 UK07 R1 12/08

DT90

DIGITAL ROOM THERMOSTAT

PRODUCT SPECIFICATION SHEET
The new DT90 family of digital room thermostats is a range of market leading products designed to provide comfort with economy in modern heating systems. Its large display and simple button interface make DT90 extremely easy to use.
Energy efficiency is addressed by state-of-the-art TPI control performance and an ECO button energy saving feature.
Applications include control of gas or oil-fired boiler systems, underfloor heating, electric heating and zoning systems.
With a modern fresh look that complements any style of décor, and a range of valued features for users and installers alike, DT90 sets the standard for simple environmentally-friendly room thermostats.
FEATURES
Energy saving TPI control performance
Advanced self-learning control adapts to the
environment and ensures close temperature control with minimum energy usage
Slim modern styling
Large high contrast display with easy-to-read
characters
Simple user interface
Temperature setting procedure eliminates the
risk of accidental setpoint change
Display shows room temperature, with option
to inquire about setpoint
5°C to 35°C setpoint range with 0.5°C
increments
Temperature set using up or down buttons
Off/standby button, allowing manual switch off,
with frost protection active
Adjustable off/standby setpoint 5°C to 16°C or
DT90 can be set to off completely
Battery powered by 2 x AA (LR6) alkaline cells
Up to 4 years battery life (minimum 2 years),
with battery low warning
Simple battery change by unclipping front
cover
Installer Mode allows the thermostat to be
customised for the application and the needs of the user
NVRAM storage of setup parameters, ensuring
these are never lost
Setpoint limits can be programmed in
24…230Vac SPDT potential-free contacts for
simple 2-wire installation
8 A resistive, 3 A inductive switch rating
Surface or switch-box mounting options
Sensor fault self-diagnostics
Heat/cool changeover operation mode possible
FEATURES UNIQUE TO DT90E ECO MODEL
Energy saving ECO button allows user to
change to a lower, energy saving setpoint for a timed period of their choosing (1…24 hours)
Display shows countdown of time remaining in
ECO energy saving mode

View the manual for the Honeywell DT90 here, for free. This manual comes under the category thermostat and has been rated by 29 people with an average of a 8.3. This manual is available in the following languages: English. Do you have a question about the Honeywell DT90 or do you need help? Ask your question here

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Question and answer

Number of questions: 7
R
Ramón 18 October 2020

Does the Honeywell DT90 thermostat display the set temperature as the ambient temperature and not the actual temperature in the environment at that moment? In other words, does it show the temperature I selected to turn on the boiler when in idle mode?

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R
ronald gorter11 February 2021

My thermostat DT90 indicates that it is 28 degrees Celsius inside the house, but it is actually 19 degrees Celsius. What should I do? Can it be adjusted?

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K
Keith Arthurby10 November 2021

Which two terminals of 1, 2 and 3 on the Honeywell Wiring Centre correspond to the A and B terminals of the DT90, please?

Which two terminals of 1, 2 and 3 on the Honeywell Wiring Centre correspond to the A and B terminals of the DT90, please?
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G
Gavaneanu Daniel5 January 2022

I have a DT92A and I don't know how to make the settings so that the boiler starts less frequently.

I have a DT92A and I don't know how to make the settings so that the boiler starts less frequently.
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P
Pedro Francia19 January 2022

DT90 thermostat, the screen has turned off for me, I change the batteries and it remains off, however the heating works. How can it be fixed? Thank you

DT90 thermostat, the screen has turned off for me, I change the batteries and it remains off, however the heating works. How ...
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S
Sergi Punti10 December 2021

I have changed the batteries of the thermostat, and it doesn't work with the new ones, the screen doesn't turn on, any solution?

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L
Laura30 December 2021

Hello, how do I connect the wires of the Honeywell DT90A thermostat? Could someone help me? Thank you.

Hello, how do I connect the wires of the Honeywell DT90A thermostat? Could someone help me? Thank you.
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General
BrandHoneywell
ModelDT90 | DT90
Productthermostats
EAN5025121386128
LanguageEnglish
FiletypeUser manual (PDF)
Operational conditions
Accuracy0.5 °C
Temperature range (T-T)5 - 35 °C
Features
Memory functionNo
Product colourWhite
Display
DisplayLCD
Power
Number of batteries supported2
Battery voltage230 V
Battery life2 year(s)
Packaging content
Batteries includedYes
Remote control includedNo
Weight & dimensions
Width90 mm
Depth27 mm
Height92 mm
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