Ferroli OMNIA HYBRID C, Installation, Maintenance And User Manual

Page: 20 / 116

20
EN
Cod. 3541T090 - Rev. 00 - 06/2019
INSTALLATION
6.11 Vacuum operation (obligatory)
ir and humidity in the cooling circuit impair the operation of the unit with effects
such as:
• Increased pressure.
• Reduced efficiency.
• Formation of ice on the capillary and subsequent blockage of the same.
• Corrosion in the circuit.
This is why a vacuum must be created in the connection pipes and indoor unit.
Proceed in the following way:
• Connect the previously described charging pipe to the vacuum pump.
• Turn on the relative knob on the monometric unit to allow the pump to access
the cooling circuit.
• Wait until the pressure level measured by the pressure gauge is around 3 mm
Hg (400 Pa)
• As soon as the required vacuum value is reached, shut the connection cock and
stop the vacuum pump.
U.I.
U.E.
GAS
CONNECTIONS
fig. 25 -
☞
NOTA
■ To activate the system it is necessary to open both the liquid and gas shut-off valves of the outdoor unit: remove the caps from both valves, and then open the valves
with an Allen wrench.
■ It is advisable to open the valves when the installation of the system is complete from an electric and hydraulic point of view and it is therefore possible
to proceed with the first start-up.
6.12 Indoor unit hydraulic connections
The safety valve outlet must be connected to a funnel or collection pipe to prevent water spurting onto the floor in case
of overpressure in the heating circuit. Otherwise, if the discharge valve cuts in and floods the room, the boiler manufacturer
cannot be held liable.
Before installation, flush all the pipes of the system thoroughly to remove any residuals or impurities that could affect
proper operation of the unit.
In case of replacement of generators in existing installations, the system must be completely emptied and cleaned of any
sludge and pollutants. For that purpose only use suitable guaranteed products for heating systems (see next section), that
do not harm metals, plastics or rubber.
The manufacturer declines any liability for damage caused to the generator by failure to properly clean the system.
Since the joints of the unit are made of brass and brass is an easily deformable material, using appropriate
tools for connecting the hydraulic circuit, inappropriate tools will cause damage to the pipes.
Make the connections to the respective points (see “fig. 6 - dimensional data and connections” on page 11) and to the symbols given on the unit.