Unical HP OWER 320RK, Руководство пользователя и инсталлятора

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B
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 specific ring nut (B). After the end of the operation, retighten the ring nut (B) and
screw the cap back on (A).In any case it is recommended to use an external valve to fill the system wich can
be set up by the installer.
FOR THE HEAT PUMP UNITS, ESPECIALLY IN VERY COLD CLIMATE REGIONS, IT’S RECOMMENDED TO INSTALL ELEVATION SUPPORTS IN ORDER
TO ALLOW ICE FORMATION UNDER THE UNIT WITHOUT DAMAGING IT BY FREEZING.
CAUTION: for heat pump units, in the event that the prepared ducting system is not used, a limited amount of water
(possible ice in the winter period) from the condensate drainage system may be deposited in the vicinity of the unit, with
consequent danger of slipping/falling.
5.8.4 Filling / Discharge of the plant
CAUTION: supervise all filling/top-up operations.
CAUTION: before filling/topping up the system disconnect power to the units.
CAUTION: the system must always be filled/topped up in controlled pressure conditions (1÷3 bar). Make sure that a pressure
reducer and safety valve have been installed on the filling/top-up line..
CAUTION: the water on the filling/top-up line must be appropriately pre-filtered from any impurities and suspended parti-
cles. Make sure that a removable cartridge filter and dirt separator are installed on the line.
CAUTION: regularly check and vent the air built up in the system..
CAUTION: install an automatic air venting valve at the highest point of the system.
If the unit must be completely drained,first close the manual inlet and outlet shutters (not supplied) and then disconnect the pipes on the water
inlet and outlet so that the liquid in the unit can drain (to make this operation easier, it is advisable to install two external drain cocks between
the unit and the manual shutters on the water inlet and outlet).