Honeywell DT90 manual

Honeywell DT90
8.3 · 29
PDF user manual
 · 8 pages
English
user 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: 10
R
Ramón October 18, 2020

The Honeywell DT90 thermostat sets the ambient temperature the same as the one I programmed for the boiler to start running, and it does not display the actual temperature in the environment at that moment. In other words, it shows the temperature I have chosen to start the boiler at rest.

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R
ronald gorterFebruary 11, 2021

My Honeywell DT90 thermostat indicates that it is 28°C inside the house, but it is actually 19°C. What should I do, can it be adjusted?

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Keith ArthurbyNovember 10, 2021

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

Which two terminals (1, 2, and 3) at the Honeywell Wiring Centre correspond to the A and B terminals of the DT90, please?
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Gavaneanu DanielJanuary 5, 2022

I have a DT92A and I do not know how to make the settings for the boiler to start less frequently.

I have a DT92A and I do not know how to make the settings for the boiler to start less frequently.
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Pedro FranciaJanuary 19, 2022

DT90 thermostat, my screen has turned off, I have changed the batteries and it still remains off, although the heating is working. How can I fix it? Thank you.

DT90 thermostat, my screen has turned off, I have changed the batteries and it still remains off, although the heating is wor...
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S
Sergi PuntiDecember 10, 2021

I have changed the batteries of the thermostat and it is not working with the new ones. The screen does not turn on. Any solution?

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LauraDecember 30, 2021

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

Hello, how do I connect the wires of the Honeywell DT90A thermostat? Can someone help me? Thank you.
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P BonniciDecember 21, 2022

We have just had the DTE90E Ecco Model intalled. It worked ok for first day, now i dont know if I've pressed the wrong buttons, but it now seems to take hours to reach the temperate I tried to set it at? I pressed up arrow to 18 degrees, but it then reverts back to 15.5. It has been at 15.5 for the past hour & a half. What do I hav to do, to make it reach 18 degrees?

The Honeywell DT90 is a thermostat that offers precise temperature control with an accuracy of 0.5 °C. Its LCD display allows for easy reading and adjustment of temperature settings. The thermostat operates on two 230V batteries, which are included in the package. With its compact dimensions of 90 mm in width, 27 mm in depth, and 92 mm in height, the Honeywell DT90 can fit into various spaces without taking up too much room. This makes it suitable for both residential and commercial settings. Although it does not have a memory function, the thermostat's simple interface and straightforward controls make it easy to set and maintain desired temperatures. Users can manually adjust the temperature according to their comfort level or energy-saving preferences. The Honeywell DT90 is designed to provide reliable performance and longevity. The premium materials used in its construction ensure durability, allowing the thermostat to withstand regular use and potential wear and tear. One notable feature of the Honeywell DT90 is its long battery life. With a lifespan of two years, users can enjoy extended use without worrying about constantly replacing the batteries. Regarding additional features, the Honeywell DT90 does not include a remote control. However, its compact size and user-friendly interface make it easy to operate directly on the device. Overall, the Honeywell DT90 is a compact and reliable thermostat that offers precise temperature control. With its durable construction, long battery life, and user-friendly design, it provides a practical solution for maintaining a comfortable indoor environment.

General
BrandHoneywell
ModelDT90 | DT90
Productthermostats
EAN5025121386128
LanguageEnglish
FiletypeManual (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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Can't find the answer to your question in the manual? You may find the answer to your question in the FAQs about the Honeywell DT90 below.

Where is the best location to place the thermostat?

The best place for the thermostat is the room where you spend the most time, in many cases the living room or kitchen. Place the thermostat about one and a half metres above the floor, not in the sun and not on an outside wall.

What is the dead band of a thermostat?

If your thermostat has a dead band, your installation is, as it were, 'at rest'. The thermostat only switches on when, for example, the difference deviates more than 2˚C from the set room temperature.

What is the ideal room temperature?

Most people find that the ideal room temperature is between 19 and 22 degrees Celsius.

What is the height of the Honeywell DT90?

The Honeywell DT90 has a height of 92 mm.

What is the width of the Honeywell DT90?

The Honeywell DT90 has a width of 90 mm.

What is the depth of the Honeywell DT90?

The Honeywell DT90 has a depth of 27 mm.

Is the manual of the Honeywell DT90 available in English?

Yes, the manual of the Honeywell DT90 is available in English .

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