RET 230 HCW1 - Thermostat DANFOSS - Free user manual and instructions

USER MANUAL RET 230 HCW1 DANFOSS

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

GB - Installation Instructions Thermostat featuresTemperature range, heating 5-30°CWater changeover temp - Cool to Heat - Heat to Cool > 30°C< 16°CThermostat off/auto & fan on selector Power supply 230 Vac ± 15%, 50/60HzRelay outputs, heat/cool & fan 2 x SPST, 3(1)A, 10-230 Vac, Type 1BDimensions (mm) 110 wide x 90 high x 40 highDesign standard EN60730-2-9Rated impulse voltage 2.5KvBall hardness test 75°CControl pollution situation Degree 2Temperature accuracy ±1°C Specifi cation4 GB - Installation Instructions 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 fl ow pipe. If the fl ow temperature exceeds 30°C the thermostat operates as a heating thermostat, if the fl ow 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 fi tting of a bypass valve between system fl ow 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 fl oor, 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 fl ow 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 fi tting of a bypass valve between system fl ow and return to ensure circulation past the sensor.

Note: If HEAT/COOL/FAN outputs are 230V, link terminals L-COM7 GB - Installation Instructions 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.

CHRONO 3CHRONO 68 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 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. GB - Installation Instructions9 GB - Installation Instructions 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 fi rmly 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.10 Fan runs continuously Fan runs with heat or cool demand Thermostat off LED lit green when thermostat is powered LED lit orange when fan running LCD display shows actual room temperature unless knob is moved at which time a fl ashing set temperature is momentarily displayed. During heating demand a fl ame symbol is lit, during cooling demand a snowfl ake symbol is lit LED lit green during heating or cooling demand Temperature setting dial, read setting off LCD display 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. GB - User Instructions RESET button11 Remarque: Ce produit doit être installé exclusivement par un électricien qualifi é ou un installateur de chauffage compétent et doit être conforme à la version en vigueur des réglementations de câblage IEEE. Instructions d’installation