Name: Honeywell DT90
Brand: Honeywell
SKU: 272953
Rating: 83 (22 reviews)

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 22 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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Angela wardle • 21-12-2021No comments

My thermostat is set for 18c but as you see is up to higher temperatures with a flashing symbol in right corner. What is the flashing symbol bottom right corner.

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Keith Arthurby • 10-11-2021No comments

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

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Kieran • 30-11-2020No comments

How can you racing thermostat to wireless box

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Terry • 3-11-2021No comments

How do you increase the temperature setting

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Stuart • 6-1-2021No comments

Setting tmer

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Lisa Hood • 14-12-2022No comments

how do I set it to come on before I get back home?

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Geoffrey GWYNNE • 13-12-2021No comments

Having successfully installed my DT90E, must I enter Installer Mode before I can use it operationally?

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Keith harvey • 8-11-2021No comments

My DT90 all ways switch off half deg higher than set point is this normal? Thanks

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Lynsey • 22-10-2021No comments

What is the heating demand indicator for

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Laurette Read • 18-10-2021No comments

If your portable thermostat says 5 and you don't know if the green Eco button was the last thing you pressed OR NOT and you keep trying the upward arrow to get the heat setting you want without success what can you do?

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Number of questions: 17