The DT4 room thermostats provide control of heating systems for homes and apartments and bring together the slim, modern design with simple functionality, a large and clear LED segment display with an easy-to-use wake up button. The range has features that are easy to love, it offers everything you and your customers want and need.
The DT4 is compatible with both hybrid and greener energy systems and energy-efficient solutions including heat pumps, zoning and underfloor heating and cooling devices and also works with zone valve applications (note, not with electric heating /240 V).
The range:
SPECIAL FEATURES
DT4/DT4M/DT4R Room Thermostat
Operating temperatures | |
Room temperature display range: | 0 °C to 40 °C |
Temperature setting | |
range: | |
Program: | 5 °C to 35 °C |
OFF (Heating Mode): | 5 °C |
Specifications | |
Control form: | Fuzzy Logic |
Heating system mode: | Heating and Cooling |
Switching capacity: | 3A (Resistive), 1A (Inductive) |
Switching type: | SPDT |
Sensing element: | 10k (@25 °C) NTC thermistor |
Power: | Powered by 2 X AA Batteries (Alkaline) OpenTherm® Smart Power batteries not required |
Wiring: | DT4 (wired) & DT4M (OpenTherm®) terminal block capable of accepting wired up to 2.5 mm2 |
RF communication
Specifications | |
RF operation band: | ISM 868.0-868.6 MHz |
Maximum power: | 25 mW |
Protocol: | Encrypted |
Communication range: | 30 m in residential building environment |
Receiver class: R.E.D. | RX Cat 2 |
Receiver box
Specifications | |
Power: | 230 V AC mains supply |
Electrical rating: | 5A (Resistive), 3A (Inductive) |
Cycle rate: | Selectable by application |
Wiring: | Terminal block capable of accepting wired up to 2.5 mm2 |
Wire access: | From bottom with cable clamps. Left Terminals – Mains wiring Right Terminals – Relay Terminals |
IP class: | IP30 |
Environmental and standards
Specifications | |
EMC: | 2014/30/EU |
LVD: | 2014/35/EU |
R&TTE: | 1995/5/EC |
Wire access: | From back via large wall box opening. |
ErP: | |
DT40, YT42 | Class IV (+2 %) |
DTS42, DT41SPM, | Class V (+3 %) |
YT43M, DT41M |
OpenTherm®
By connecting the DT4M to an OpenTherm® appliance, additional OpenTherm® Parameters within the DT4R/DT4M.
Heat Range
The normal lower temperature limit of 5 °C can be increased up to 21 °C to protect from cold. Useful if the users include the elderly, children or disabled. The normal upper-temperature limit of 37 °C can be reduced down to 21 °C to save the users energy.
Cooling Range
The normal lower temperature limit of 15 °C can be increased up to 27 °C, useful if the users include the elderly, children or disabled. The normal upper temperature limit of 40 °C can be reduced down to 27 °C to save the users energy.
Application Coverage
DT4 room thermostat is designed to work with OpenTherm® wired and wireless, boilers, heat pumps and zoning applications such as evohome/HCC100. DT4R also communicates to existing Honeywell Home wireless devices such as ST9000 (UK Timers) and BDR91A (Boiler Relay) allowing easy upgrades to existing systems
Eco Offset
The DT4 has an Eco Offset function that can be used to boost the system for a period of time. Eco Offset state operates in 0.5 °C varying from -3 °C to + 3 °C.
Providing both a boost function when operating in + °C and providing an economy temperature reduction in – °C. The period of time for the Eco Offset is set by the user in the user menu of the product, this can be set from 1-24 hours, with 0 cancelling the Eco setting.
Failsafe
When the temperature sensor fails (DT4, DT4M) or the radio communication between the thermostat and the receiver box is lost the device will cycle the demand 20 % On/80 % Off.
TRANSPORTATION AND STORAGE
Keep parts in their original packaging and unpack them shortly before use. The following parameters apply during transportation and storage
Parameter | Value |
Min. ambient temperature: | 0 °C |
Max. ambient temperature: | 40 °C |
Shipping and storage temperature: | -20 °C to 55 °C |
Parameter | Value |
Min. ambient relative humidity: | 10 % * |
Max. ambient relative humidity: | 90 % * |
Thermostat display/Button layout
Reference to the icons:
Receiver box interface
Series | Colour | Wired | Wireless | On/Off | OpenTherm® | OpenTherm® Smart Power | EAN Code | Item No. |
DT4 | white | • | • | 5059085002619 | DT40WT20 | |||
grey | • | • | 5059085002626 | DT40GT21 | ||||
black | • | • | 5059085002633 | DT40BT22 | ||||
DT4 | white | • | • | 5059085002732 | DT41MWT30 | |||
grey | • | • | 5059085002749 | DT41MGT31 | ||||
black | • | • | 5059085002756 | DT41MBT32 | ||||
DT4M | white | • | • | 5059085002763 | DT41SPMWT30 | |||
grey | • | • | 5059085002770 | DT41SPMGT31 | ||||
black | • | • | 5059085002787 | DT41SPMBT32 | ||||
DT4R | white | • | 5059085002671 | DTS42WRFST20 | ||||
grey | • | 5059085002688 | DTS42GRFST21 | |||||
black | • | 5059085002695 | DTS42BRFST22 | |||||
DT4R | white | • | • | 5059085002640 | YT42WRFT20 | |||
grey | • | • | 5059085002657 | YT42GRFT21 | ||||
black | • | • | 5059085002664 | YT42BRFT22 | ||||
DT4R | white | • | • | 5059085002701 | YT43MRFWT30 | |||
grey | • | • | 5059085002718 | YT43MRFGT31 | ||||
black | • | • | 5059085002725 | YT43MRFBT32 |
DOWNLOAD MANUALS:
HONEYWELL HOME DT4 Room Thermostat Product Data Sheet
OTHER MANUALS:
HONEYWELL HOME DT4 Room Thermostat User Guide
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