Danfoss RET2000 Data sheet
Datasheet
RET2000 Digital Room Thermostat
Features
RET2000 Digital Room Thermostats combine
sleek modern design with high performing
energy saving control. Incorporating a generous,
easy to read display that clearly shows the room
temperature and output status of the thermostat.
Further enhanced by an inbuilt backlight this
thermostat is also ideal for those with poorer
eyesight or where the location is dimly lit. As well
as standard on/o control the user can select
to benet from Danfoss chrono- proportional
control. Normally set at installation although easy
to change via a DIP switch this micro-processor
based control system will deliver increased
comfort and improved economy.
When chrono-proportional mode is set, the
thermostat introduces a xed cycle rate on
the system and then determines the duration
of the On and O periods within each cycle in
proportion to load. The control algorithm used to
determine the on/o periods uses a proportional
+ integral (PI) routine to eliminate oset normally
associated with on/o or simple proportional
control.
Chrono-proportional control signicantly
improves comfort and generally improves boiler
eciency by optimising water temperature.
Additional features include settable upper and
lower temperature limits as well as pushbutton
lock to avoid tampering. If preferred the
temperature display can also be set to show oF.
The RET2000 also has the option to be set as a
cooling device, reversing the output logic and
including compressor delay settings.
• Selectable Chrono Proportional or On/O
control
• User Set Upper and Lower Temperature Limits
• Output On Indication
• Push Button Lock
• Cooling Option with Compressor delay
• °C or °F Selectable Display
Installer Settings
Function Setting Function
Chrono 1 On/Off
6 Cycles 2 3/12 Cycles
3 Cycles 3 12 Cycles
Heating 4 Cooling
°C 5 °F
Keys Unlocked 6 Keys Locked
© Danfoss HS | 09/2015 | 111v02 VDRKT202
Heating Control Cooling Control
Function Setting Function
No Comp Delay 1 Comp Delay
4 Min Delay 2 2 Min Delay
Not Active 3 Not Active
Heating 4 Cooling
°C 5 °F
Keys Unlocked 6 Keys Locked
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Datasheet RET2000 Digital Room Thermostat
ErP
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Specications and
Ordering Information
Product Conversion Table
ErP Class
Product
Class
Thermostat Features RET2000MS RET2000M RET2000B
Ordering codes 087N644200 087N644000 087N644100
Product Line 03
Type Digital Thermostat
Power Supply 230Vac +/-15%, 50/60Hz 2.5 – 3VDC (2xAA batteries)
Output 230Vac Volt free
Setting temperature range 5-30 °C
Operating temperature range 0-45 °C
Switch rating 3A at 230Vac
Switch type SPDT type 1B
Battery lifetime N/A Min. 2 years
IP Rating IP20
On/O Control Yes
Chrono-proportional control Yes
Dimensions (mm) H84 x W84 x D37
New Part Can Replace
RET2000MS New
RET2000M RET-M
RET2000B RET-B, RT51, RET-B-LS
ERP Class
The products represented within this document are classied according to, and allow completion of, the Energy Related Product
(ErP) Directive System Package che and the ErP system data label. ErP Labelling obligation is applicable from 26th September
2015.
ErP Class Product Function and ErP Description Additional eciency gain
TPI Room Thermostat, for use with on/off output heaters
IV
An electronic room thermostat that controls both thermostat cycle rate
and in-cycle on/o ratio of the heater proportional to room temperature.
TPI control strategy reduces mean water temperature, improves room
temperature control accuracy and enhances system eciency.
2%
Wiring Details
RET2000B
2
1
ON
COM
3
OFF
RET2000M RET2000MS
ELECTRONICS
N
N
230Vac
L
L
1
COM
2
ON
OFF
3
ELECTRONICS
N
N
230Vac
L
L
2
ON
3
OFF
Danfoss Ltd.
Ampthill Road
Bedford MK42 9ER
Tel: 01234 364621
Fax: 01234 219705
Email: ukheating@danfoss.com
Website: www.heating.danfoss.co.uk
Danfoss can accept no responsibility for possible errors in catalogues, brochures, and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already
on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
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© Danfoss HS | 09/2015 | 111v02 VDRKT202
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