System Filling And Emptying; Filling - Beretta POWER MAX Installation And Operation Manual

Parameters
General characteristic
PH value
Dissolved oxygen
Total iron (Fe)
Total copper (Cu)
Na2SO3
N2H4
PO4
CaCO3
Trisodium phosphate
Chlorine
Electrical conductivity
Pressure
Max. 40% (only propylene
Glycol
b
All data in the table refer to water contained in the system after
8 weeks' operation.
b
Do not use excessively softened water. Excessive water sof-
tening (total hardness < 5° f) results in corrosion due to contact
with metal elements (pipes or thermal module components)
b
Immediately repair any leaks or drips that could result in air
entering the system
b
Excessive pressure fluctuations can cause stress and fatigue
to the heat exchanger. Keep the operating pressure constant.
b
Water used to fill a system for the first time and water used
to top it up must always be filtered (using synthetic or metal
mesh filters with a filtration rating of no less than 50 microns) to
prevent sludge from forming and triggering deposit corrosion.
b
If oxygen enters a circuit continuously or even intermittently
(e.g. in under-floor heating systems whose pipes are not pro-
tected by impermeable synthetic sheaths, in circuits with open
expansion vessels, or in circuits that require frequent top-ups)
always separate the boiler's water circuit from the central heat-
ing circuit.
a
It is prohibited to top up the heating system constantly or fre-
quently, since this can damage the thermal module's heat ex-
changer. The use of automatic topping up systems should be
avoided for this reason.
To sum up, in order to eliminate contact between air and water (and to
prevent the latter from becoming oxidized), it is necessary:
- that the expansion system be a closed vessel, correctly sized
and with the correct pre-loading pressure (to be regularly
checked);
- that the system be always at a pressure higher than the atmos-
pheric one at any point (including the pump suction side) and
under any operating conditions (all seals and hydraulic cou-
plings in a system are designed to withstand pressure towards
the outside, but not underpressure);
Value Unit
Colourless, without
sediment
Min. 6.5; Max. 8 PH
< 0,05 mg/l
< 0,3 mg/l
< 0,1 mg/l
< 10 mg/l
< 3 mg/l
< 15 mg/l
Min. 50 ; Max.150 ppm
None ppm
< 100 ppm
<200 μS/cm
Min. 0.6; Max. 6 bar
%
glycol)
- the installation be not made with gas-permeable materials (e.g.
plastic pipes without oxygen barrier for underfloor heating sys-
tems)
b
Damages suffered by the thermal module, caused by encrus-
tations and corrosion, are not covered by warranty. In addition,
the non compliance of the water requirements listed in this
chapter will void the appliance warranty itself.

2.12 System filling and emptying

The thermal module POWER MAX must be provided with a charging
system to be connected to the appliance's return line.
RI
Before filling or emptying the system, switch the system's master
switch to the OFF position and the thermal module's master switch
to ( 0 ).

2.12.1 Filling

- Make sure that drain cocks (1) are closed before you start
loading the system
POWER MAX 50 P DEP - POWER MAX 50 P
1
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