Danfoss RET230 HCW-1 Electronic Heat Cool Thermostat User Manual

Danfoss RET230 HCW-1 Electronic Heat Cool Thermostat

Product Information

Specifications

• Thermostat features:
  • Temperature range, heating
  • Water changeover temp – Cool to Heat – Heat to Cool
  • Thermostat off/auto & fan on selector
• Power supply: Relay outputs, heat/cool & fan
• Dimensions (mm): 110 wide x 90 high x 40 high
• Design standard: Type 1B
• Rated impulse voltage
• Ball hardness test
• Control pollution situation
• Temperature accuracy

Product Overview

The RET 230 HCW-1 thermostat is designed for use in systems equipped with fan coils served by a -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.

Installation Instructions

1. First remove the wallplate from the back of the unit.
2. Ensure that there is a minimum of 50mm above the unit and 100mm below the unit in order to mount the plug-in module.
3. Fix the unit at a height of approximately 1.5m from the floor, away from draughts or heat sources such as fan-coil outlets, sunlight, or office equipment.
4. Fix the pipe sensor to the flow pipe using the clamping band supplied.

Pipe Sensor Location

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.

Wiring

For 2-pipe fan coil application, refer to the electronics wiring diagram provided.

FAQ

Q: Who should install this product?

A: This product should only be installed by a suitably qualified electrician or heating installer.

Q: What regulations should the installation comply with?

A: The installation must comply with local Building Regulations and wiring Regulations, including any competent person requirements that may exist.

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

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

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°C the thermostat operates as a heating thermostat, if the flow temperature is less than 16°C 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 office 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.

Wiring

2-pipe fan coil application

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

Commissioning

Prior to re-fitting 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 (all switches in On position)

DIL Switch descriptions

• Switch 4: If set to On/Off, both heating and cooling operates in on/off mode. If set to Chrono, both heating and cooling operates in chrono-proportional 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 0 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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Fero danette Competiti DirectiVe. C Directives: (EMC) (89\336 \EEC), (92\31 \EEC) Low Voltage Directive. (LVD) (73\23\EEC), (93\68\EEC)

Part No 39053 Issue 04 05/06 SW REV 2.1

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