RET 230 HCW3 - Thermostat DANFOSS - Free user manual and instructions

Technical Features	Details
Type of thermostat	Programmable electronic thermostat
Temperature range	5°C to 30°C
Power supply	230 V AC
Temperature sensor	Built-in sensor
Display	Backlit LCD screen
Operating modes	Comfort, Economy, Frost protection
Programming	Programmable over 7 days
Installation	Wall mounting
Maintenance	Annual check recommended
Safety	Overheat protection
Warranty	2 years
Additional information	Compatible with various heating systems

Frequently Asked Questions - RET 230 HCW3 DANFOSS

How can I set the temperature on the DANFOSS RET 230 HCW3 thermostat?

To set the temperature, press the temperature adjustment button and use the arrows to increase or decrease the desired temperature.

What should I do if the thermostat does not turn on?

First, check that the thermostat is properly powered. Make sure the circuit breaker is not tripped and that the batteries (if applicable) are in good condition.

How do I reset the thermostat?

To reset the thermostat, press and hold the reset button for about 5 seconds until the screen flashes.

The thermostat displays an error, what should I do?

Refer to the user manual for the specific error code. Generally, restarting the thermostat or checking the connections can resolve the issue.

How do I change the thermostat batteries?

Open the battery compartment at the back of the thermostat, remove the used batteries, and replace them with new AA batteries, respecting the polarity.

The thermostat does not communicate with the heating system, what should I do?

Check that the thermostat is properly configured for your heating system. Also ensure that the connections are secure and that the heating system is functioning correctly.

How do I activate eco mode on the thermostat?

To activate eco mode, press the mode button until the eco mode icon appears on the screen.

Is there a programming function on the thermostat?

Yes, the DANFOSS RET 230 HCW3 has a programming function. You can access the programming settings by pressing the programming button and following the on-screen instructions.

What is the adjustable temperature range on the thermostat?

The adjustable temperature range on the DANFOSS RET 230 HCW3 thermostat is generally between 5 °C and 30 °C.

How do I know if the thermostat is working properly?

To check proper operation, monitor if the thermostat responds to temperature changes and if the heating system activates accordingly.

USER MANUAL RET 230 HCW3 DANFOSS

Electronic Heat / Cool thermostat with auto-changeover based on water temperature

Installation Instructions User Instructions

Installation Instructions 3-9
User Instructions 10

Installation Instructions

Please note

This product should only be installed by a suitably qualified electrician or heating installer. The installation must comply with local Building Regulations and wiring Regulations, including any competent person requirements that may exist

Specification

Thermostat features
Temperature range, heating 5-30°C
Water changeover temp - Cool to Heat - Heat to Cool	>30°C <16°C
Manual fan speed selector	●
Thermostat off/auto & fan on selector	●
Power supply 230 Vac ± 15%, 50/60Hz
Relay outputs, heat/cool & fan 2 x	SPST, 3(1)A, 10-230 Vac, Type 1B
Dimensions (mm) 110 wide x 90 high x 40 high
Design standard EN60730-2-9
Rated impulse voltage 2.5Kv
Ball hardness test 75°C
Control pollution situation Degree 2
Temperature accuracy ±1°C

Product overview

The thermostat is designed for use in systems equipped with fan coils served by a 2-pipe central changeover system. The thermostat controls the operation of a motorized valve which, during heating periods, opens when heat is required and which, during cooling periods, opens when cooling is required.

The changeover from heating to cooling is achieved automatically by measuring the temperature of the flow pipe. If the flow temperature exceeds 30^ the thermostat operates as a heating thermostat, if the flow temperature is less than 16^ the thermostat operates as a cooling thermostat

Important note: It is essential that the circuit in which the pipe sensor is located is not closed off and that water circulates past the sensor at all times. This may require the fitting of a bypass valve between system flow and return at the end of each circuit.

Installation

First remove the wallplate from the back of the unit.

• Ensure that there is a minimum of 50mm above the unit and 100mm below the unit in order to mount the plug-in module.

Fix at a height of approximately 1.5m from the floor, away from draughts or heat sources such a fan-coil outlets, sunlight or offi ce equipment.

Pipe sensor location

Fix the pipe sensor to the flow pipe using the clamping band supplied.

Important note: It is essential that the circuit in which the pipe sensor is located is not closed off and that water circulates past the sensor at all times when the system is in operation. This may require the fitting of a bypass valve between system flow and return to ensure circulation past the sensor.

2-pipe fan coil application

Note:

If HEAT/COOL/FAN outputs are 230V, link terminals L-COM

Commissioning

Prior to re-fi tting the thermostat to the wallplate, the DIL switches on the rear of the unit must be set to the desired setting.

DIL Switch options, shown in factory set position.

Sw On

DIL Switch descriptions

Switch 4: If set to On/Off, both heating and cooling stages operate in on/off mode. If set to Chrono, heating stage operates in chrono-proportional modes, cooling continues in On/off mode

Switch 3: Active only if switch 4 is set to Chrono. This switch determines the number of cycles per hour that the thermostat will impose on the system, the options are three 20 minute cycles or six 10 minute cycles

Switch 2: Allows Celsius or Fahrenheit temperature scaling to be selected

Switch 1: Not used in this model

Mounting thermostat to the wallplate

To mount the thermostat to the wallplate, align the tabs on the top of the thermostat with the apertures in the wallplate and hinge the thermostat down, pressing firmly to engage the securing clip in the wallplate.

Locking & limiting

To lock or limit the setting range turn the setting dial to 3 and remove knob.
Position the locking springs on the rear of the dial to the desired position and re-mount the knob ensuring that number 3 on the dial aligns with the reference mark on the case.

Note: Should it be necessary to reset the microprocessor for any reason, a reset button is located beneath the setting dial. Use a non-metallic point, for example a matchstick, to depress the recessed button.

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This product complies with the following EC Directives:

Electro-Magnetic Compatibility Directive.

(EMC) (89\336\EEC), (92\31\EEC)

Low Voltage Directive.

(LVD) (73\23\EEC), (93\68\EEC)

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