Circulating Air Source Heat Pump Water Heater
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Fig4 Non-timer water supply installation diagram for modular unit (the heating water tank is higher than
heat storage water tank)
1) Makeup water control: When the water level inside the water tank is lower than the low water
level, the water makeup solenoid valve will be started to make up water; when the water level reaches
the high water level, the water makeup solenoid valve will be turned off. For the first time water makeup
before operation, water can be made up into water tank directly. During operation, the water will make up
automatically from the water inlet of heating unit.
2) Instruction for heating operation: When the hot water temperature inside the water tank is lower
than a certain temperature below the set temperature, the unit will be started up. The hot water
circulating pump will let the water inside the hot water tank; when the water temperature inside the water
tank reaches set temperature, the unit will stop operation.
As for the project with thermal storage water tank, if the water level switch of thermal storage water
tank is lower than the low water level, the water discharge solenoid valve (water discharge pump)
between heating water tank and thermal storage water tank will be started up, and then fill the thermal
storage water tank with water. If the water level switch of the thermal storage water tank is at the high
water level, the water discharge solenoid valve between heating water tank and thermal storage water
tank (water discharge water pump) won’t act and it won’t fill the thermal storage water tank with filter.
3) Parallel connection quantity of unit 1≤n≤16.
4) The heating water tank and the thermal storage water tank must be insulated.
5) As for the heat supply system of modular system with timer function, if the water consumption
volume is not big and not frequently, it’s no need to set thermal storage water tank in the project (fig 2);
as for the non-timer heat supply system, if the water consumption volume is big and frequently, it’s
required to set heating water tank and thermal storage water tank. In general, one heating water tank is
ok; while there should be one or more thermal storage water tank according to the actual circumstances
for satisfying water consumption requirement at any time. At present, there are two kinds of setting
method for heating water tank and thermal storage water tank: one setting method is contour setting,
