Danfoss RET2000 MD Installation guide

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RET2000 MD

Electronic digital thermostat with LCD, delayed start

Danfoss Heating

Installation Guide

For a large print version of these instructions

please call Marketing on 0845 121 7400.

Danfoss can accept no responsibility for possible errors in catalogues, brochures, and other printed material. 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.

RET2000MD

Installation Instructions

Speci cations RET2000MD

Operating Voltage 230Vac 50/60Hz

Output Volt free

Setting temp. range 5-30°C

Operating temp. range 0-45°C

Switch rating 3A (1) at 230Vac

Switch type 1 x SPDT Type 1B

IP rating IP20

On/o control Yes

Chrono-proportional control Yes

Delayed start Yes

Construction EN 60730-2-9

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Control pollution situation Degree 2

Rated impulse voltage 2.5kV

Ball pressure test 75°C

Dimensions (mm) H84 x W84 x D35

Software Classi cation A

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Mounting

Fix at a height of 1.5m approx from the  oor, away from draughts or heat sources such as radiators, open  res or direct sunlight.

Please Note:

This product should only be installed by a quali ed electrician or competent heating installer and should be in accordance with the current edition of the IEEE wiring regulations.

RET2000MD

Mounting

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Wiring

RET2000MD

ELECTRONICS

230Vac

Note: For RET2000 MD live supply is from the Time Control output.

COM

OFF

RET2000MD

DIL switch settings

Slide the DIL switches to the settings required.

ON/OFF - output switches ON when below set temperature and OFF when above.

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CHRONO -

intervals to maintain a set temperature, achieving a constant ambient environment for the user.

use 6 Cycles for radiator systems

use 3 Cycles for under oor heating

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energy saving feature which  res the boiler at regular

DIL switch settings

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DELAYED START -

energy saving feature which automatically delays the heating start time, depending on how close to set-point the ambient room temperature already is (see chart opposite). For example during milder weather the heating start time can be delayed to avoid wasting fuel by bringing rooms up to temperature earlier than necessary.

Delayed start only operates when switched from a timer control.

CHRONO 6 CYCLES 3 CYCLES

ON/OFF 3/12 CYCLES 12 CYCLES

DELAYED START ON

°C

KEYS UNLOCKED

DELAYED START OFF °F KEYS LOCKED

RET2000MD

DIL Switch Settings

switch on, minutes

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Time delay after time control

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Temperature below thermostat setting, ⁰C

Locking and Limiting

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The RET2000 has an Advance Programming Mode in order to set up temperature lock and limit settings.

• Press the V button until the standby mode is reached.

• The V button should then be released and then pressed and held for a further 5 seconds to enter the Advanced Programming Mode.

• To indicate that the unit is in Advanced Programming Mode the Standby Indicator will  ash and the display will show the setting number alternating with the current value for that setting.

• To change the setting press either the Λ or V button.

RET2000MD

• A simultaneous push and release of both buttons will scroll through the steps S1 to S3 and will save the current set value if altered.

• To exit Advanced Programming Mode and return to Standby Mode press and hold both buttons for more than 5 seconds.

• While in Advanced Programming Mode if no buttons are pressed for more than 2 minutes the unit will automatically return to Standby mode, and the value on the current setting will not be saved.

S1 – Lower Temperature Limit

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This setting allows for a Lower Temperature Limit to be set. The Lower Limit can be set between 5°C (41°F) and 30°C (86°F).

Default – 5°C/41°F

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S2 – Upper Temperature Limit

This setting allows for a Upper Temperature Limit to be set.

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The Upper Limit can be set between 5°C (41°F) and 30°C (86°F). However, this will be limited by the Lower Temperature Limit set in S1 therefore the Upper Temperature Limit cannot be less than the Lower Temperature Limit.

Default – 30°C/86°F

S3 – Set Point Power-Up Temperature

This setting de nes the set point at power up when Button Lock is enabled on the DIL switch. This can be set between the Lower and Upper Temperature Limits set in S1 and S2.

Default – 21°C/70°F

RET2000MD