For Proper System Operation, Make Sure That - Biasi Riva Advance Combi Installation & Operation Instructions

15. Commissioning
15.1 For proper system operation, make
sure that:
•
using softened water to reduce the
total hardness. The water must also be
conditioned in order to keep the pH within
the foreseen threshold in order to prevent
corrosion (see the following table).
• Both for new systems as well as when
systems that eliminate air and impurities
impurity separators and micro air bubble
separators);
• Avoid draining system water during
ordinary maintenance, even apparently
with suitable shut-off valves;
• Always analyze the system water before
opening the communication between the
new generator and the system in order to
determine if the parameters of the water
indicate the need to completely drain
the system, to use the water already
contained in the system or to chemically
wash the system, using mains water
with the addition of detergent, when it
is suspected that the system could be
dirty or particularly blocked, and the next
time new water is loaded. If the analysis
of a sample of the water that will be
used for loading the system shows the
following values, the system can be used.
Otherwise, an inhibitor must be used.
9,6 < pH < 10,5
Ca + Mg : <0,5 °F
++ ++
OH + 1/2 CO : de 5 à 15 °F
3
P O : de 10 à 30 mg/l
2 5
Na SO : de 20 à 50 mg/l
2 3
If the system water is also in contact with
aluminum, a pH value <8.5 is required.
43 RIVA ADVANCE COMBI MANUAL
• Remove the front panel of the case.
• Lift the cap on the automatic air purger
valve 3 (Fig 15.1) one full turn and leave
open permanently.
Figure 15.1
•
valve between the cold water inlet and
Central Heating System (See 44 on piping
diagrams on page 11 of this manual and
12 of the User manual).
• Open each radiator air vent starting at the
lower point and close it only when clear
• Purge the air from the pump by unscrewing
the pump plug 2 (Fig. 15.1); release the
pump by turning the rotor in the direction
indicated by the arrow on the information
plate.
• Close the pump plug.
•
reading should ideally be 1.3 bar (19 psi)
and not less than 0.3 bar (4.3 psi).
• Close all air release valves on the c.h.
system.
• Inspect the boiler and the system for
water soundness and remedy any leaks
discovered.
•
loose particles and any system debris
3
2