Filling And Purging The Installation - Fujitsu Waterstage WOYG112LCTA Maintenance Document

Air to Water Heat Pump (Split integrated DHW type)
4 .3

Filling and purging the installation

Check the pipe fixings, the tightness of the connectors
and the stability of the appliance.
Check the direction in which the water is circulating and
that all the valves open.
Proceed to fill the installation.
Do not operate the circulating pump while filling. Open all
the drain valves in the installation and the bleeder valve
for the hydraulic unit (P) to remove the air contained in
the conduits.
Close the drain and bleeder valves and add water until
the pressure in the hydraulic circuit reaches 1 bars.
Check that the hydraulic circuit has been purged correctly.
Check there is not a leak.
After the "Commissioning", page
machine has started, purge the hydraulic unit again
(2 litres of water).
" Precise filling pressure is determined by the
manometric height of the installation .
P
figure 28 - Hydraulic unit bleeder valve
Installation and operating manual "1768 - EN"
1
2
40, once the
3
4
5
6
7
8
9
10
11
Legend:
1
2
3
4
5
6
7
8
9
10
11
"Liquid" refrigerant connection.
"Gas" refrigerant connection .
Heating return (1 circuit).
Heating flow (1 circuit).
Stop valve (not supplied).
DHW exit (domestic hot water).
DCW entry (domestic cold water).
Shut-off (not supplied).
Filling.
Safety unit (required / not supplied).
Connecting to the drain with the siphon.
- Bleed tap evacuation.
- Safety valve evacuation.
figure 27 - Connections
- 27 -