System Filling And Emptying; Filling - Beretta POWER MAX 50 P DEP 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
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 softening (total hardness < 5° f) results in cor-
rosion 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 operat-
ing 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 syn-
thetic 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 inter-
mittently (e.g. in under-floor heating systems whose
pipes are not protected by impermeable synthetic
sheaths, in circuits with open expansion vessels, or
in circuits that require frequent top-ups) always sepa-
rate the boiler's water circuit from the central heating
circuit.
a
It is prohibited to top up the heating system constant-
ly or frequently, since this can damage the thermal
module's heat exchanger. The use of automatic top-
ping 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, cor-
rectly sized and with the correct pre-loading pressure
(to be regularly checked);
- that the system be always at a pressure higher than
the atmospheric one at any point (including the pump
suction side) and under any operating conditions (all
seals and hydraulic couplings in a system are de-
signed to withstand pressure towards the outside,
but not underpressure);
Value Unit
Colourless, without
sediment
Min. 6.5; Max. 8
< 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
micro-
<200 siemens/
Min. 0.6; Max. 6 bar
Max. 40% (only pro-
pylene glycol)
- the installation be not made with gas-permeable ma-
terials (e.g. plastic pipes without oxygen barrier for
underfloor heating systems)
b
PH
Damages suffered by the thermal module, caused
by encrustations and corrosion, are not covered by
warranty. In addition, the non compliance of the water
requirements listed in this chapter will void the appli-
ance 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.
cm
%
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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