Danfoss RET2000MD Data sheet

Datasheet

RET2000MD Delayed Start Room

Thermostat

Features

RET2000MD Digital Room Thermostat combines 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/off control the user can select

to benefit from Danfoss chronoproportional 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 fixed cycle rate on the system and then determines the duration of the On and Off periods within each cycle in proportion to load.

The control algorithm used to determine the on/ off periods uses a proportional + integral (PI) routine to eliminate offset normally associated with on/off or simple proportional control.

Chrono-proportional control significantly improves comfort and generally improves boiler efficiency by optimising water temperature.

The RET2000MD is an intelligent room thermostat that incorporates an additional energy saving delay start feature, which delays the start-up of the heating dependent upon how close to setpoint the room temperature is at the time heating is scheduled to turn on.

Under most load conditions, this feature reduces the number of hours per day that the system runs, without creating any discomfort. This feature can, if necessary, be cancelled if the user wishes to

override the delay period.

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.

•Inteligent Delayed Start

•Selectable Chrono Proportional or On/Off control

•User Set Upper and Lower Temperature Limits

•Output On Indication

•Push Button Lock

•°C or °F Selectable Display

Installer Settings	RET2000MD
Function		Setting			Function
Chrono					On/O
			1
6 Cycles					3/12 Cycles
			2
3 Cycles			3		12 Cycles
Delayed Start On			4		Delayed Start O
°C			5		°F
Keys Unlocked			6		Keys Locked

© Danfoss HS | 09/2015 | 145v02 VDJTC202

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Datasheet

RET2000MD Delayed Room Thermostat

Specifications and

Ordering Information

Product Conversion Table

ErP Class

ErP

Product 4

Class

Delay Curve

Thermostat Features	RET2000MD
Ordering codes	087N644500
Product Line	03
Type	Digital Thermostat
Power Supply	230Vac, 50/60Hz
Output	Volt free
Setting temperature range	5-30 °C
Operating temperature range	0-45 °C
Switch rating	3A at 230Vac
Switch type	SPDT type 1B
IP Rating	IP20
On/Off Control	Yes
Chrono-proportional control	Yes
Dimensions (mm)	H84 x W84 x D37

New Part	Can Replace
RET2000MD	RET-MD

ERP Class

The products represented within this document are classified according to, and allow completion of, the Energy Related Product (ErP) Directive System Package fiche and the ErP system data label. ErP Labelling obligation is applicable from 26th September 2015.

	ErP Class	Product Function and ErP Description	Additional
			efficiency 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/off ratio	2%
		of the heater proportional to room temperature. TPI control strategy reduces mean water tem-
		perature, improves room temperature control accuracy and enhances system efficiency.

	The RET2000MD intelligent room thermostat
	delays the start-up of the heating system by a	<![if ! IE]> <![endif]>controlaftertimedelay minuteson,switch
	variable time period that is determined by the
	difference in the room temperature compared
	to the temperature set on the thermostat. The
	smaller the difference, the longer the delay
	before the heating is allowed to turn on. A built-
	in limit ensures that the delay period cannot	<![if ! IE]> <![endif]>Time
	exceed 60 minutes.
		Temperature below thermostat setting, C

Wiring Details

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Danfoss Ltd.

Ampthill Road

Bedford MK42 9ER

Tel: [phone]

Fax: [phone]

Email: [e-mail]

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.

2	© Danfoss HS | 09/2015 | 145v02 VDJTC202