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Cont. ALL piping external to the building or in an unconditioned space MUST have a minimum 3⁄4” thick closed cell insulation with all joints taped, ensuring none of the system piping is exposed. 4. Water Quality Water with high concentrations of chloride that exceed 0.1 ounces per gallon (200mg/litre) can cause corrosion and subsequent failures, and thus the warranty will be no longer valid for the heat pump unit and tank unit. No warranty coverage is given on the heat pump unit and tank unit where the PH is less than 6.0. Supply water with a PH less than 6.0 may be treated to raise the PH and it is recommended that an analysis of the supply water be conducted before connecting the heat pump unit to the system. Changing, or alternating, from one water supply to another can have a detrimental effect on the operation and/or life expectation of the water tank, PR valve, water heating circulation and the heat exchanger in the system and should be tested to ensure it meets the warranty requirements in the installation manual. 5. Tank Unit Positioning If installing the tank unit indoors or in an enclosed space, leave at least 2” of clearance around the back and sides of the tank. Sanden tanks have all of the connections on the sides of the tank, not the top of the tank like the majority of the North American water heaters. Ensure adequate clearance for the connections and piping to the tank and the piping for the supplied mixing valve is maintained. 6. Outdoor Unit Positioning Ensure that a minimum distance of 6” behind the unit and 12” in front of the unit is maintained, otherwise, the condenser airflow could be affected. Ensure adequate access for service and setting panel operation is provided. Access to the unit can be obtained by removing the top cover and front cover of the condensing unit and all valve and electrical connections are on the RHS of the outdoor unit when looking at the condenser fan. Sanden recommends a minimum of 18” separation when stacking the units vertically and 24” for RHS service access. 7. Error Codes Errors occur typically because the system has either: too little flow of water from the tank to the heat pump, incorrect voltage to the system, and/or has not been purged of air in the water on start up. 15PDF Image | Sanden SANCO2 Heat Pump Water Heater 2017
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