Danfoss DHP-A User Manual

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Danfoss DHP-A User Manual Manual pdf 9 page image

3.5 Water heaterDanfoss heat pumps DHP-H and DHP-C are supplied with an integrated 180 litre water heater. They are equip-ped with a TWS coil, which results in more effective heat transfer and more efficient layering of the water in thewater heater.123457861 Tap hot water2 Top temperature sensor3 Water heater4 TWS coil5 Start temperature sensor6 Supply line to TWS coil7 Return line from TWS coil8 Cold water lineHot water production is prioritised over heat production.The temperature of the hot water cannot be adjusted. Hot water production does not stop at a preset watertemperature; it stops when the compressor’s operating pressure switch reaches its maximum pressure. Thiscorresponds to a hot water temperature of approximately 50–55°C in normal conditions.To prevent the build up of bacteria in the water tank, the temperature of the water is increased at regular inter-vals using the integrated electrical heater (anti-legionella function). The factory-set time interval is seven days(can be adjusted). When the anti-legionella function is active, the heat pump produces hot water until the tem-perature for the start temperature sensor (5) has reached 60°C.In the control system’s TEMPERATURE menu, the temperatures that are measured and calculated for the hotwater and heating system supply line are displayed. The current temperature of the top temperature sensor (2)and the temperature of the supply line during heating and hot water production are displayed. The tempera-ture of the supply line often exceeds the maximum permitted hot water temperature, usually during hot waterproduction.The hot water tanks for DHP-A differ from the other heat pumps as the function for defrosting the outdoor unitis different.User Guide Domestic heat pumpsDanfoss Heating Solutions VUGFE102 9