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 user 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? Ask your question here

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Question and answer

Number of questions: 5
R
Ramón 18 October 2020

Marks as room temperature the same temperature that I set for the boiler to start and it doesn't show the actual temperature in the environment 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 in the house but it is actually 19 degrees. 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 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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G
Gavaneanu Daniel5 January 2022

I have a DT92A and I don't know how to make the settings so that the central heating starts less often.

I have a DT92A and I don't know how to make the settings so that the central heating starts less often.
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Pedro Francia19 January 2022

DT90 thermostat, the screen has turned off on me, I have changed the oils and it remains off, however the heating is still working. How can it be fixed? Thank you.

DT90 thermostat, the screen has turned off on me, I have changed the oils and it remains off, however the heating is still wo...
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The Honeywell DT90 is a thermostat that can accurately measure temperature with an error margin of 0.5°C. It features an LCD display that shows the temperature readings in a clear and easy-to-read manner. The thermostat is powered by two 230V batteries that are included in the package. Its battery life is two years, and the memory function is not supported in this model. The Honeywell DT90 has a modern and compact design that measures 90 mm in width, 27 mm in depth, and 92 mm in height. The small size makes it easy to install and operate without any professional assistance. However, it doesn't have a remote control included, so it has to be manually operated. The Honeywell DT90 is a reliable and cost-effective solution to control temperature in residential and commercial spaces. It can be used to regulate heating or cooling systems to maintain a comfortable temperature. The accurate temperature readings ensure efficient energy usage, which is essential for reducing utility bills. Due to its durable construction and reliable performance, Honeywell DT90 is a popular choice for those who want a no-fuss thermostat solution. To conclude, the Honeywell DT90 is a simple and efficient device that provides accurate temperature measurements to control heating or cooling systems. Its compact design and long battery life make it an affordable solution for regulating temperature in homes and offices.

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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