SYSTEM FILLING AND DRAINING
S - AF appliances are NOT fitted with a filler valve, and
therefore a suitable filling system must be envisaged
during installation at the most convenient point for the
installer.
As a guideline, the figure illustrates a possible system
filling unit connection point (CI).
NOTE:
The appliance is equipped with an automatic valve for
purging the air from the system.
Before starting the system filling or draining operation:
- Set the main switch (IG) of the system and the main
appliance switch (Ip) to “OFF”
FILLING
- Ensure that the drain valve (1) is closed
- Ensure that the pre-charge pressure of the expansion
vessel(s) is correct
- Open the water system shut-off devices (CI) and slowly
charge until the pressure gauge (2) indicates a value, in
cool conditions, of approx. 2 bar
- Close the water system shut-off devices (CI).
DRAINING
- Ensure that the water system shut-off devices (CI) are
closed
- Connect a transfer hose to the drain valve (1) and then
open the valve
- On completion of draining, close the valve (1).
DSP
Ip
Vf
TST
IG
MI
CI
RI
1
2
MI
CI
RI
1
- 30
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INST
ALLA
TION