Ariston 3024151 Instrucciones De Instalacion Y Uso página 36

GB
installation
all the fi ttings, in addition to the effi -
cient operation of the safety valve.
- After checking the tightness, empty
the system completely in order to pre-
vent the water inside it from freezing.
- Cleaning the system
Prior to fi lling the system, it is necessary
to eliminate any residues that have built-
up during the manufacturing and instal-
lation phases. Even minimal amounts of
foreign material can act as a catalyst and
cause the carrier fl uid to decompose.
- Flush the system thoroughly with
water and/or a product specifi cally
designed for cleaning solar heating
systems, until all residues have been
removed.
- If specially formulated cleaning prod-
ucts have been used, fl ush the system
again with water only, in order to pre-
vent any potential chemical reactions
between the cleaning product and the
propylene glycol.
- Empty the system completely.
- Filling the system
Open all cut-off and relief devices, in par-
ticular the relief plugs on the collector
attachments and the air relief valve con-
nected to the degasser.
Only propylene glycol formulated for use
in solar heating systems can be used as
the carrier fl uid. It is not permitted to op-
erate the system using water only, even
in areas protected against frost (lack of
protection against corrosion).
Comply with any indications provided in
the glycol safety sheet.
- Introduce the carrier fl uid into the sys-
tem by means of a force pump through
the fi ll valve and the hose connector
provided, while keeping the fl ow rate
adjustment tap closed and the drain
tap open.
36
FLOW RATE
ADJUSTMENT VALVE
- Close the cut-off and relief devices in
sequence, as soon as the liquid starts
to escape. Leave the fi lling pump run-
ning until the system is completely
free of air bubbles. Before completing
the fi lling procedure, adjust the sys-
tem pressure and shut off the fi lling
and drain valves slowly.
- System pressure: 0.5 bar above the
static head (but at least 1.5 bar).
- Let the system stabilise then check
the pressure. If necessary, open the
valves and adjust the pressure value
again; once the fi lling value has been
reached, shut the valves.
- Adjusting the fl ow rate
(only possible once the electrical con-
nections have been made)
- The fl ow rate can be adjusted by inter-
vening on the valve inside the module.
- Turn the valve clockwise to reduce the
fl ow rate or anti-clockwise to increase
it.
- Adjust the fl ow rate defi ned by the sys-
tem's design.
- The system interface display will visu-
alise the fl ow rate.
FILL