Ferroli OMNIA H 04E, Installation, Maintenance And User Manual

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TIGHTNESS CHECK (RECOMMENDED OPERATION)
Before setting the system in a vacuum, it is advisable to make sure
that the cooling circuit is tight, including the connecting joints between
the pipes and the indoor unit. Proceed in the following way:
• With the service valves of the outdoor unit completely shut, remove
the cap from the service tap (1- side figure) of the gas connection
(the larger one)
• Connect the service valve to a monometric unit plus nitrogen bottle
(N2).
• Pressurize the system to a maximum 30 bar using the nitrogen in
the bottle.
• Use liquid soap to check that the joints are tight.
Keep the bottle vertical during the pressurizing operation to prevent
liquid nitrogen from infiltrating into the system!
• Check all the connection joints on both the outdoor and indoor
units to make sure that they are tight. Bubbles will form if leaks are
present. If bubbles appear, make sure that the unions have been
tightened and that the flares are the right shape.
• Wipe off the liquid soap with a rag.
• Reduce the pressure of the nitrogen in the circuit by loosening the
charge pipe from the bottle.
• Having reduced the pressure, disconnect the nitrogen bottle.
VACUUM OPERATION (OBLIGATORY)
Air 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.
fi g. 1
fi g. 2
■ 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 fi rst start-up.
NOTA
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GAS
CONNECTIONS
U.I.
U.I.
U.E.
U.E.
GAS
CONNECTIONS
INSTALLATION