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2 .10 Filling the system
Once the hydraulic connections have been completed the sys-
tem will have to be filled.
Operate on the filling tap.
Vent air from inside the pipes and the device at the same time.
Operate the manual air vent valve.
During these operations, the machine must be disconnected
from the mains power supply.
The working pressure of the system must not exceed 1.5 bar
with the pump switched off. To check any possible leaks from
the system when setting up we suggest you increase the test
pressure and then reduce it successively it to reach the working
pressure.
If the water pressure exceeds 3 bar the safety valve opens and
discharges the water. Connect a drain pipe to water safety valve
so as to prevent that some water leakage can get inside electri-
cal parts.
Once all the electrical connections have been made and the cir-
culation pump is activated, check that there are no pockets of air
in the system. If this happens, stop the pump, release the air and
re-start, repeating the procedure until it is all cleared. To avoid
dangerous cavitations which could damage the pump and make
the entire system less efficient, the inlet pressure with the pump
switched on must not be less than 0.6 bar, measurable with the
pressure gauge on the device.
1.
Filling tap
2.
Manual air relief valve
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