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Maintenance Split systems are very easy to maintain, in reality they are not very different to the maintenance on a Central A/C or heat pump system, and can be placed on a similar maintenance schedule. 1. Heat Pump If the heat pump unit is installed outdoors, it will be exposed to the elements. Remove the top and side covers of the unit and check the evaporator for any dirt or debris. On the Gen2 unit, there is a filter on the cold water inlet connection – periodically, it needs to be removed and the filter cleaned. Check for leaks of any kind from pipes and tears in insulation. To clean the unit, simply blow away the debris with an air hose or spray the unit down with a water hose, coil cleaning solutions can be used without problem. 2. System Draw water from the tank via a faucet: check the delivered mixed temperature vs customer requirement. Adjust the mixing valve if needed. Draw water from the tank to start the heat pump. Check the unit parameter mode to check delivered water temperature vs set-point. Check error history. Note any recent or new error codes If drain down freeze protection system is installed, cycle the power to check valve operation – restart system and ensure unit operation. 3. Tank Open the pressure relief valve to prevent sticking, ensure water is discharged. Check the thermistor connection in to the thermistor well and the wiring connection to the terminals (both sides of the terminal). 32PDF Image | Sanden SANCO2 Heat Pump Water Heater 2017
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