i-HPV5 Inverter air/water heat pumps with axial fan
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It is advisable to use an external tap to ll the system, which is the responsibility
of the installer.
There is always a service tap in the unit to be used if it is necessary to top up/
discharge the amount of water in the system or adjust the percentage of glycol.
A
When it is required to top up the circuit or to adapt the glycol level, please use the service valve. Unscrew
and remove the cap from the service valve (A) and connect a 14 or 12 mm pipe (inside diameter - check
the valve model installed on your unit), connected to the water mains, to the hose connector and then
drain the circuit by unscrewing the specic ring nut (B). Aer the end of the operaon, reghten the ring
nut (B) and screw the cap back on (A).In any case it is recommended to use an external valve to ll the
system wich can be set up by the installer.
The unit is ed with an air venng valve to automacally remove air that has built up in the circuit, pre-
venng undesirable eects such as premature corrosion and wear, lower performance and low exchange
output.
The device also features a safety funcon because, in the event of exchanger breakdown, it allows the
refrigerant gas to escape outside, prevenng it fro being conveyed to the internal terminals.
The valve can be kept in a closed posion by closing the plug on the drain; by loosening the plug, the valve
remains in open posion and air is discharged automacally.
ELECTRICAL CONNECTIONS
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