RET2000 MS - Thermostat DANFOSS - Free user manual and instructions

Brand	Danfoss
Model	RET2000 MS
Product type	Electronic room thermostat
Power supply	230 VAC ±15 %, 50/60 Hz
Temperature range (heating)	5 °C to 30 °C
Temperature range (cooling)	16 °C to 36 °C
Contact rating	3 A at 230 VAC
Switch type	1 x SPDT, Type 1B
Protection rating	IP20
Dimensions (H x W x D)	84 x 84 x 35 mm
Weight	200 g
Recommended mounting	1.5 m above floor, away from drafts and heat sources
Control type	On/Off or Chronoproportional (TPI)
Operating modes	Selectable heating and cooling
ERP class	IV
Efficiency gain	2%
Compliance	EN 60730-2-9
Pollution degree	2
Rated impulse voltage	2.5 kV
Ball pressure test	75 °C
Software class	A
Lock and limit functions	Adjustable lower (S1) and upper (S2) temperature limits, setpoint at power-up (S3)
Maintenance and cleaning	Clean with a soft dry cloth. Do not use abrasive products or solvents.
Safety	Installation by a qualified electrician. Disconnect power before any intervention.
Spare parts and repairability	No replaceable parts. In case of defect, the unit must be replaced.

Frequently Asked Questions - RET2000 MS DANFOSS

How to install the RET2000 MS thermostat?

Install the thermostat approximately 1.5 m above the floor, away from drafts and heat sources (radiators, direct sunlight). Installation must be carried out by a qualified electrician. Follow the wiring diagram provided in the manual.

What is the difference between On/Off and Chrono modes?

The On/Off mode triggers the boiler based on a fixed temperature differential. The Chrono (TPI) mode is an energy-saving function that activates the boiler at regular intervals to reach the setpoint without overshooting, thus improving comfort and efficiency.

How to set temperature limits?

In standby mode, press and hold the V (heating) or ∧ (cooling) button for 5 seconds to enter advanced settings. Use parameters S1 (lower limit) and S2 (upper limit) to set the allowed range. Press both buttons simultaneously to change parameter and exit by holding both buttons for 5 seconds.

Can I use this thermostat for cooling?

Yes, the RET2000 MS supports selectable heating and cooling modes. The temperature range in cooling mode is 16 °C to 36 °C.

How to lock the keypad?

Keypad locking is activated via the microswitch. Refer to the manual for hardware lock configuration. Once activated, only adjustments via microswitches are possible.

What to do if the screen flashes?

Flashing indicates that the thermostat is in advanced setting mode. If you do not wish to change settings, wait 2 minutes: the thermostat automatically returns to standby mode without saving changes.

What is the battery life?

The RET2000 MS model is mains powered. For the RET2000B and RET2000M variants using batteries, the battery life is at least 2 years with AA alkaline batteries.

How to reset the thermostat?

To reset advanced settings, press and hold both buttons simultaneously for more than 5 seconds in standby mode. This exits setting mode without saving. No factory reset is described in the manual.

Which cycles to use for Chrono mode?

Use 6 or 12 cycles for heating systems with radiators, and 3 cycles for underfloor heating. These settings are adjustable via microswitches.

Does the thermostat display the room temperature?

Yes, the screen displays the room temperature. Setpoint values and settings are also displayed during modification.

USER MANUAL RET2000 MS DANFOSS

ENGINEERING TOMORROW

RET2000 B/M/MS

Electronic digital thermostat with LCD

Installation Guide

Danfoss Heating

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.

Installation Instructions

Specifications RET2000MS	RET2000M	RET2000B
Operating Voltage 230Vac ±1	5%, 50/60Hz		2.5 - 3 VDC (2xAA batteries)
Output 230Vac Volt free
Setting temp. range 5-30°C (cooling 16-36°C)
Operating temp. range 0-45°C
Switch rating 3A (1) at 230Vac
Switch type 1 x SPDT Type 1B
Battery lifetime N/A Min. 2 years
IP rating IP20
On/off control Yes
Chrono-proportional control Yes
Operating modes	Heating/Cooling selectable
Construction	EN 60730-2-9
Control pollution situation	Degree 2
Rated impulse voltage	2.5kV
Ball pressure test	75°C
Dimensions (mm) H84 x W84	x D35
Software Classification	A

Danfoss Heating

3

Installation Instructions

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 Descri-p-tion	Additional efficiency gain
IV TPI Room Thermostat, for use with on/off output heaters An electronic room thermostat that controls both thermostat cycle rate and in-cycle on/off ratio of the heater proportional to room temperature. TPI control strategy reduces mean water temperature, improves room temperature control accuracy and enhances system efficiency.	2%	Erp Class 4

Mounting

Fix at a height of 1.5m approx from the floor, away from draughts or heat sources such as radiators, open fires or direct sunlight.

Please Note: This product should only be installed by a qualified electrician or competent heating installer and should be in accordance with the current edition of the IEEE wiring regulations.

Wiring

GB

DE

DK

ES

FR

NL

RU

TR

RET2000B

Wiring

RET2000M

RET2000MS

DIL switch settings

Slide the DIL switches to the settings required.

ON/OFF - output switches ON when below set temperature and OFF when above. (Reverse when in cool mode)

CHRONO - energy saving feature which fires the boiler at regular intervals to maintain a set temperature, achieving a constant ambient environment for the user.

use 6 or 12 Cycles for radiator systems
- use 3 Cycles for underfloor heating

DIL Switch Settings

Heating selection

Cooling selection

Mounting

GB

DE

DK

ES

FR

NL

RU

TR

Locking and Limiting

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

• Press the V button when in heat mode or button when in cool mode until the standby mode is reached.
• The button or 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 flash and the display will show the setting number alternating with the current value for that setting.

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

• 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

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) in Heat mode, or between 16°C (61°F) and 36°C (97°F) in Cool mode.

Default – 5°C/41°F for Heat mode or 16°C/61°F for Cool mode.

S2 – Upper Temperature Limit

This setting allows for a Upper Temperature Limit to be set. The Upper Limit can be set between 5°C (41°F) and 30°C (86°F) in Heat mode, or between 16°C (61°F) and 36°C (97°F) in Cool mode. 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 for Heat mode or 36°C/97°F for Cool mode.

S3 – Set Point Power-Up Temperature

This setting defines 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 for Heat mode or 24°C/75°F for Cool mode.

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Website: www.heating.danfoss.co.uk

Part No 44035v03 07/15

VIRKP202