RET2000 B - Thermostat DANFOSS - Free user manual and instructions

Product type	Room thermostat
Brand	Danfoss
Model	RET2000 B
Dimensions (H x W x D)	84 x 84 x 35 mm
Power supply	230 VAC ±15%, 50/60 Hz or 2.5–3 VDC (2 AA batteries)
Temperature setting range (heating)	5–30 °C
Temperature setting range (cooling)	16–36 °C
Operating temperature range	0–45 °C
Maximum contact rating	3 A (1) at 230 VAC
Switch type	1 x SPDT, Type 1B
Control mode	On/Off and Chronoproportional (TPI)
Operating modes	Selectable heating and cooling
Protection rating	IP20
Pollution degree	Degree 2
Rated impulse voltage	2.5 kV
Software class	A
ERP class	IV
Battery life	Minimum 2 years
Installation	Approximately 1.5 m above the floor, away from drafts and heat sources
Maintenance and cleaning	Clean with a soft, dry cloth. Do not use solvents or abrasive products.
Safety	Installation by a qualified electrician or competent heating engineer. Complies with IEEE regulations.
Spare parts and repairability	Rechargeable batteries (AA). Microswitch settings accessible. No additional spare parts provided.

Frequently Asked Questions - RET2000 B DANFOSS

How to install the RET2000 B thermostat?

Install the thermostat approximately 1.5 m above the floor, away from drafts (windows, doors) and heat sources (radiators, fireplaces, direct sunlight). Installation must be carried out by a qualified electrician or a competent heating engineer, in accordance with current IEEE regulations.

What are the available operating modes?

The RET2000 B thermostat offers two modes: heating and cooling. You can select the desired mode via the internal microswitches.

How to adjust the microswitches?

Set the microswitches to the required settings: on/off (switching on/off according to a fixed differential) or chrono (energy-saving function with regular cycles). Use 6 or 12 cycles for radiators, 3 cycles for underfloor heating.

How to lock or limit the temperature?

Press the V button (heating) or Λ button (cooling) until standby mode, then hold the button for 5 seconds to access advanced settings (S1 to S3). S1 sets the lower limit, S2 the upper limit, and S3 the setpoint temperature at startup.

What is the battery life?

The thermostat can operate on batteries (2 AA batteries) with a lifespan of at least 2 years. It can also be powered by 230 VAC.

What to do if the screen shows nothing?

Check the power supply: if using batteries, replace them. If the device is mains-powered, check the circuit breaker. If the problem persists, contact a professional.

Can I use the thermostat for cooling?

Yes, the RET2000 B supports cooling mode. The adjustment range is 16 to 36 °C. You must select cooling mode via the microswitches.

How to clean the thermostat?

Clean the device with a soft, dry cloth. Never use solvents, abrasive products, or water, as they could damage the electronics.

What are the symbols on the screen?

In advanced setting mode, the lock indicator flashes. The screen displays the setting number alternately with the current value. In normal operation, it shows the room temperature or setpoint.

Can I replace the batteries without losing settings?

Yes, the settings are retained in memory even when changing batteries. However, it is recommended to replace the batteries quickly to avoid any data loss.

USER MANUAL RET2000 B 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

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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

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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.

Installatie-instructions

Email: [e-mail]

Website: www.heating.danfoss.co.uk

Part No 44035v03 07/15

VIRKP202