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Evo Flex Manual
4.4 Water Loop Connection
Pay attention to the below matters when the water pipe is connected.
•
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.
•
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.
4.5 Electrical Connection
•
Open the front panel and open the power supply access.
•
The power supply must go through the wire access and be connected to the power supply terminals in the
controlling box. Then connect the 3-signal wire plugs of the wire controller and main controller.
•
If an external water pump is required, please insert the power supply wire into the wire access and connect
it to the water pump terminals.
•
If an additional auxiliary heater is needed to be controlled by the heat pump controller, the relay (or power)
of the aux-heater must be connected to the relevant output of the controller.
4.6 Initial Start-up of the Unit
INSPECTION BEFORE TRIAL RUNNING
•
Check the indoor unit, make sure that the pipe connection is done correctly, and the relevant valves are open.
•
Check the water loop to ensure that the water inside of the expansion tank is filled to an appropriate level, and
the water supply is working, and the water loop is full of water and free of trapped air. Make sure there is good
insulation for the water pipe.
•
Check the electrical wiring. Make sure that the power voltage is normal, the screws are fastened, the wiring is
made in line with the diagram and that the earthing is connected.
•
Check that the heat pump includes all the screws and components, and that they are in good order. When
powering the unit on, review the indicator on the controller to see if there is any indication of failure. The gas
gauge can be connected to the check valve to see the high pressure (or low pressure) of the system during trial
running.
TRIAL RUNNING
•
Start the heat pump by pressing the ‘POWER’ button key on the controller. Check whether the water pump is
running, if it runs normally there will be 0.2MPa on the water pressure meter.
•
When the water pump has ran for a minute, the compressor will start. Listen for any strange sounds from the
compressor, if an abnormal sound occurs please stop the unit and check the compressor. If the compressor runs
well please look for the pressure meter of the refrigerant.
•
Check whether the power input and running current is in line with the manual. If not please stop and check.
•
Adjust the valved on the water loop to make sure that the hot (cool) water supply to each door is good and
meets the requirements of heating (or cooling).
•
Review whether the outlet water temperature is stable.
•
The parameters of the controller are set by the factory, the user cannot change these themselves.
