Owner`s manual

27
Electrical connections
Before starting the work on electrical connections ensure, the power supply corresponds to the data on
manufacturer´s nameplate and check also the electric characteristics of the unit.
Important: person making the installation is responsible for connection of unit protective circuit breaker,
which must have parameters corresponding to the capacity of the unit (see table with electric characteristics
of the unit).
Connection to the electric distribution network must be done in compliance with valid standards and
regulations.
Procedure for electrical connection: remove the inspection panel, which will allow access to the electrical
box. For removing of inspection panel take out the control unit from its holder. Pull the power supply cable
through the cable bushing.
WARNING!
Connections must be done according to the wiring diagram, which is located on the electric box.
Wires of power supply cable must be made of copper and must have the cross-section in compliance with
valid standards.
Earth connection of the unit must be done through earthing clamp, located inside the electric box.
Power supply voltage must not have fluctuations of more than 10%. Phase unbalance must not be more
than 3%.
All wires are connected through screw terminals.
Wire insulation must removed in the length of 10 mm.
Trial operation
Check before trial operation:
 Check the indoor unit and ensure all pipes are in order and respective valves are open.
 Check electrical connections. Check the power supply, fixing of screw connections, correct
connecting according to the wiring diagram and correct earthing of the unit.
 Check the heat pump inclusive all screws and parts of the pump to see they are ok. After switching
on check control unit indicators to see there is no malfunction. During the trial operation it is possible
to connect a pressure gauge to the test valve and check high pressure (or low pressure) of the gas.
Trial operation:
 After the first power connection heat pump will activate (LCD display will illuminate), necessary test
will be done automatically and heat pump is waiting for next settings in stand-by mode.
 Check if the water pump is running and if it is running normally.
 After 1 minute of operation of water pump, compressor will start. Listen, if there is no strange sounds
coming out from the compressor (noisy knocking, squeaks…). If this should be the case, switch the
unit off and check the compressor.
 Set valves of water distribution so, that warm (cold) water distribution to each branch is correct and
corresponds requirements for heating (cooling).
 Check whether the temperature of output water is stable.