Honeywell YT43MRFBT32 Room Thermostat Instructions

: June 13, 2024
: Honeywell

Table of Contents

APPLICATION
SPECIAL FEATURES
TECHNICAL DATA
METHOD OF OPERATION
TRANSPORTATION AND STORAGE
TECHNICAL CHARACTERISTICS
ORDERING INFORMATION
Documents / Resources

YT43MRFBT32 Room Thermostat
Instructions

DT4/DT4R/DT4M
Room Thermostat

APPLICATION

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:

DT4, DT4R and DT4M are compatible with 24-230 V On/Off appliances such as gas boilers, combi-boilers, and heat pumps
DT4 and DT4M are for wired on the wall installations and the DT4R for wireless installations
DT4R is a thermostat and receiver box that is also designed to be backwards compatible with existing Honeywell Home RF products. The DT4R is designed with the installers in mind and includes a received module with mounting options for directly on the wall or on the wall box
DT4M and DT4R versions support OpenTherm® appliances, with versions available for both standard OpenTherm® and OpenTherm® Smart Power

SPECIAL FEATURES

Slim and modern design and three colourways blends into any décor
Table stand or wall mounted thermostat options to fit new and replacement installations
Modern and clear LED display with adjustable brightness for easier viewing in all light conditions
Clear coloured icon indicating product state
Adjustable parameter functions to allow optimum control of connected appliance
Off’ position has an integral frost protection setting at minimum 5 °C to prevent pipes freezing
Eco Offset – allowing a timed offset temperature for Eco mode during heating and cooling
Backwards compatibility with existing Honeywell Home wireless products
Receiver box with clear LED indication and override button
On/Off or OpenTherm® (DT4R/DT4M) compatible control
A flip up wiring platform for easy wiring
User menu allows extra functions to be set at the discretion of the user:
– Heating, Cooling or Heating and Cooling
– On/Off
– Eco Offset duration
Installer menu allows extra functions to be set at the discretion of the installer to match the homeowner’s applications and needs
– LED display brightness
– Cycle rate
– Heating and cooling changeover
– Upper/Lower set point limit adjustment
– Minimum ON time
– Minimum OFF time
– Temperature Eco Offset
– Factory reset
– Binding (DT4R only)

TECHNICAL DATA

DT4/DT4M/DT4R Room Thermostat

Operating temperatures

RF communication

Specifications

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

METHOD OF OPERATION

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.

-3 °C in Heating mode will reduce the temperature by 3 °C
-3 °C in Cooling mode will increase the temperature by 3 °C
+3 °C in Heating mode will increase the temperature by 3 °C
+3 °C in Cooling mode will reduce the temperature by 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 % *

*non condensing

TECHNICAL CHARACTERISTICS

Thermostat display/Button layout

Reference to the icons:

Heat Demand: Room temperature is below set-point – indicating there is a demand for heating (boiler activity might occur).
Cooling Demand: Room temperature is above set-point – indicating there is a demand for chiller or cooling appliance demand.
Wireless Signal: Thermostat (DT4R only) is connected to the Receiver Box.
Eco: Temporary adjustment of set point.
Off: Indicating the thermostat is currently off.
Warning: Alerting you there is an issue with communication or battery level.
Low Battery: Power has reached approximately 10 % – flashes when critically low (see changing the batteries).

Receiver box interface

Honeywell YT43MRFBT32 Room Thermostat - Receiver box

Status LED
• Communication with thermostat
• Binding mode
Manual override
Reset
• Delete binding

Dimensions

Overview

Honeywell YT43MRFBT32 Room Thermostat - Dimensions

Note: All dimensions in mm unless stated otherwise.

ORDERING INFORMATION

Options

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

Note : Every package includes 14 languages: English, Dutch, French, German, Italian, Spanish, Portuguese, Bulgarian, Czech, Hungarian, Polish, Romanian, Slovak, Turkish.

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EN0H-8608GE23 R0323
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