i-32V5 Air/water inverter heat pumps with axial fansi
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If the unit needs to be drained completely, rst close the manual inlet and outlet gate valves (not included in supply) and then detach the pipes
on the outside of the water inlet and outlet to drain liquid from the unit (to make this operaon easier, it is recommended to install two drain
valves between the unit and manual gate valves on the outside of the water inlet and outlet).
If it is necessary to top up the system or adjust the glycol content, the service tap can be used.
Unscrew the cap of the service tap (A) and connect a pipe of 14 or 12 mm (ineral diameter
measurements - check the tap model installed on your unit) connected to the water mains to
the hose connector, then ll the system by unscrewing the ring nut (B). Once the operaon is
completed, ghten the ring nut (B) again and screw the cap (A). In any case, it is advisable to
use an external tap to ll the system.
In the hydraulic circuit of the unit, 2 service sleeves with gap (1/4”G) are installed
dowstream and upstream of the circulator (ref. SM unit funconal diagram paragraph
5.6.2); when removing/mounng the cap, use 2 spanners as shown in the gure to
avoid damaging the pipes.
The unit is ed with an air venng valve to automacally remove air that has built up in
the circuit, prevenng undesirable eects such as premature corrosion and wear, lower
performance and low exchange output.
The device has also a safety funcon in that, in the event of exchanger breakdown, it
allows the refrigerant gas to escape into the outside air, prevenng it from being trans-
ported 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 vented automacally.
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