SHERPA SHW
Sanitary water heat pump
19
To access the electrical box:
1)
remove the plastic cover of the top part
2)
remove the metallic cover of the electrical box unscrewing the 4 screws
3)
the unit is already provided with a power supply cable connected to the electrical box. If it’s necessary to disconnect it and to
connect a longer cable, or if it’s necessary to connect an ON/OFF remote signal, or an external flow switch and pump for
circulating sanitary water or solar water, please refer to the wiring diagram.
The specification of the power supply wire is 3*1.5mm². Fuse specification is T 3.15A 250V.
There must be a switch when connecting the unit to the power system. The current of the switch is 10A.
A creepage breaker must be installed near the power supply and the unit must be effectively earthed. The specification of the
creepage breaker is 30mA, less than 0.1sec.
10
START UP
Before start-up:
Check out the availability of the supplied wiring diagram and manual of installed apparatus.
Check out the availability of the electrical and hydraulic diagram of the plant in which the unit is installed.
Check out that all water connections are properly installed and all indications on unit labels are observed.
Check the inlet water pressure, make sure that the pressure is sufficient (above 1,5 bar).
Check that the shut-off valves of the hydraulic circuit are open.
Verify that the hydraulic circuit has been charged under pressure and air vented.
Check if any water flows out from the hot water outlet, make sure that the tank is full of water before turning on the power.
Ensure that arrangements have been provided to drain the condensate.
Check out that all power cables are properly connected and all terminals are hardly fixed.
Check that electrical connections are carried out according to the norms in force including grounding.
Check out that the voltage is the one shown in the unit technical label.
Make sure the voltage is within the limits (± 10%) of tolerance range.
Check out that there is no refrigerant leakage.
Check out that all the cover panels are installed in the proper position and locked with fastening screws before start up.
Check the unit; make sure everything is ok before turning ‘ON’ the power of the unit, check the light on the wire controller
when the unit runs.
Use the wire controller to start the unit.
Listen to the unit carefully when turning ‘ON’ the power of the unit. Turn the power ‘OFF’ when you hear an abnormal sound.
Measure the water temperature, to check the undulation of the water temperature.
Once the parameters have been set, the user cannot change the parameters optionally. Please use a qualified service person
to do this.
WARNING: Never switch off the unit (for a temporary stop) by switching off the main switch: this component should
be used to disconnect the unit from the power supply only for long stoppages or maintenance/repairing operations.
WARNING: Do not modify the internal wiring of the unit otherwise the warranty will terminate immediately.
