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/o control the user can select
to benet 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 oset normally associated
with on/o or simple proportional control.

Chrono-proportional control signicantly
improves comfort and generally improves boiler
eciency 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/O
control

• User Set Upper and Lower Temperature Limits

• Output On Indication

• Push Button Lock

• °C or °F Selectable Display

Installer Settings

Function Setting Function

Chrono 1 On/O

6 Cycles 2 3/12 Cycles

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

RET2000MD

1

Datasheet RET2000MD Delayed Room Thermostat

Time delay after time control

switch on, minutes

Temperature below thermostat setting, ⁰C

ELECTRONICS

N

L

1

2

3

COM

ON

OFF

ELECTRONICS

N

L

1

2

3

4

N

L

TS715 si RET2000 MD

ErP

4

Specications and
Ordering Information

Product Conversion Table

ErP Class

Product

Class

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/O 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 classied 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

TPI Room Thermostat, for use with on/off output heaters

An electronic room thermostat that controls both thermostat cycle rate and in-cycle on/o ratio

IV

of the heater proportional to room temperature. TPI control strategy reduces mean water tem­perature, improves room temperature control accuracy and enhances system eciency.

Additional

eciency gain

2%

Delay Curve The RET2000MD intelligent room thermostat

delays the start-up of the heating system by a
variable time period that is determined by the
dierence in the room temperature compared
to the temperature set on the thermostat. The
smaller the dierence, the longer the delay
before the heating is allowed to turn on. A built­in limit ensures that the delay period cannot
exceed 60 minutes.

Wiring Details

RET2000MD

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.

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© Danfoss HS | 09/2015 | 145v02 VDJTC202