4.4 Plumbing
•Try to reduce the resistance to the water from the piping.
•The piping must be clear and free from dirt and blockage. A water leakage test must be carried out to
ensure that there is no water leaking before the installation can be made.
•The pipe must be tested by pressure separately. DO NOT test it together with the unit.
•There must be an expansion tank on the top point of the water loop, and the water level inside the tank
must be at least 0.5meters higher than the top point of the water loop.
•The flow switch is installed inside of the heat pump, check to ensure that the wiring and action of the
switch is normal and controlled by the controller.
•The connection between the heat pump and the construction is best to be of a flexible type to avoid
vibration transfer. The support to the water pipe must be separate, but not rely on the heat pump unit.
•Try to avoid any air from being trapped inside the water pipe, there must be an air vent on the top point of
the water loop.
•There must be a thermometer and pressure meter at the water inlet and outlet for easy inspection during
running.
•There must be drainage on the low points of the water system, and there is already drainage on the
chassis of the heat pump. The water in the system must be drained out during winter if the heat pump is
not to be used.
4.5 Electrical Connection
•Open the panel and open the power line hole
•Thread the power line though the hole and connect it to the power line terminal. The three-core control
line of the remote controller shall be plugged with the three-core signal line on the main board according
to the wiring diagram.
•For an external water pump, thread the power line of the water pump through the hole and connect it to
the water pump terminals.
•If an additional auxiliary heater is needed to be to be controlled by the heat pump controller, the relay (or
power) of the aux-heather must be connected to the relevant output of the controller.
ATTENTION:
•The unit should use an independent power supply, see wiring in 8.4 Cable Specifications. Power supply
voltage must be in line with the rated voltage.
•The power supply circuit must be equipped with an All-pole disconnect device and have at least 3mm
contact opening distance.
•The wiring must be completed by a professional technician in accordance with the circuit diagram.
•Power supply circuit must have earth wire; the earth wire of power should be connected with an external
earth wire safely. The external earth wire must be in order.
•The creepage protection device must be settled in accordance with the relevant national technical
standards for electronic equipment.
•The power wire and signal wire should be neatly arranged. High voltage wires and low voltage wires must
be separated and free from any interference. These wires must also be free from any pipes or valves on
the unit.
•When all wiring is completed, the power should only be connected after a thorough double check.
