Danfoss RET1000MD Data sheet

Datasheet

RET1000MD Delayed Start Room Thermostat

Features

RET1000MD Smart Room Thermostat combines sleek modern design with high performing energy saving control. The well-proportioned dial and clear temperature scale makes setting easy, including an easy to set upper and lower temperature limiting feature. All RET1000 thermostats include stylish backlit LED icons providing clear indication of power and output status. 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.

Installer Settings

RET1000MD

 

Function

Setting

Function

 

 

 

 

On/O

 

Chrono

 

1

 

6 Cycles

 

2

3/12 Cycles

 

 

 

3 Cycles

 

3

12 Cycles

 

 

 

Delayed Start On

 

4

Delayed Start O

 

 

 

 

 

 

 

Delay Curve

The RET1000MD intelligent room thermostat

 

delays the start-up of the heating system by a

 

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 exceed 60

 

minutes.

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 RET1000MD is a smart room thermostat that incorporates an additional energy saving delay start feature, which delays the start-up of the heating dependent upon how close to set-point 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.

Intelligent Delayed Start

Selectable Chrono Proportional or On/Off control

User Set Upper and Lower Temperature Limits

Output On Indication

Power Indication

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Temperature below thermostat setting, C

© Danfoss HS | 09/2015 | 143v02 VDJTB202

1

Danfoss RET1000MD Data sheet

Datasheet

RET1000MD Delayed Start Room Thermostat

Specifications and

Ordering Information

Product Conversion Table

ErP Class

ErP

Product 4

Class

Thermostat Features

RET1000MD

Ordering codes

087N645400

Product Line

03

Type

Dial 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

RET1000MD

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.

 

Wiring Details

RET1000 MD

TS715 si

RET1000 MD

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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 | 143v02 VDJTB202

 

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