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: 5
R
Ramón 18 October 2020

Mark as room temperature the same temperature that I set for the boiler to start and it doesn't return to show the actual temperature in the room at that moment. In other words, what it shows at rest is the one I have chosen to start the boiler.

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R
ronald gorter11 February 2021

My thermostat, the 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, 1, 2 and 3, at the Honeywell Wiring Centre are equivalent to the A and B terminals of the DT90, please?

Which two terminals, 1, 2 and 3, at the Honeywell Wiring Centre are equivalent 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 adjust the settings so that the boiler starts less often.

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

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

DT90 thermostat, the screen has turned off, I change the oils and it remains off, however the heating works. How can it be fi...
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The Honeywell DT90 is a thermostat that boasts an accuracy of 0.5°C. It has an LCD display, and is powered by two 230V batteries with a battery life of 2 years. The product has a width of 90 millimeters, a depth of 27 millimeters, and a height of 92 millimeters. Batteries are included, but a remote control is not. The Honeywell DT90 has no memory function. In terms of design, the thermostat is compact and easy to install. Measuring only 27 millimeters deep, it can be mounted onto walls seamlessly without taking up too much space. Due to its small size, the display can be perceived as slightly small, although it still provides clear readings of indoor temperatures. The Honeywell DT90 is designed for basic thermostat needs, and does not come with advanced features such as Wi-Fi connectivity or remote controls. Overall, the Honeywell DT90 is a functional and reliable thermostat that can adequately meet the basic temperature control needs of households. Its accuracy of 0.5°C ensures precision in temperature measurement, and the inclusion of batteries adds convenience and accessibility. However, it lacks in terms of advanced features and memory function.

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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