14
Water connections
6.11 Water filter
Must be installed immediately in the water input of the
unit, in a position that is easily accessible for cleaning.
The filter must have an adequate mesh to prevent the
entry of particles grater that:
plate exchanger (mm) 1,6
ATTENTION
⊲ The filter never should be removed, this operation
invalidates the guaranty.
6.12 Non-return valve
Provide for the installation of non-return valves (A) in the
case of several units connected in parallel.
6.13 Operation sequence
Before starting the unit pump:
1 Close all vent valves in the high points of the unit
hydraulic circuit
2 Close all drain shut-o valves in the low points of
the unit’s water circuit
exchangers
pumps
collectors
storage tanks
3 Carefully wash the system with clean water: fill and
drain the system several times.
4 use the bypass to exclude the exchanger from the
flow (diagram on the previous page)
5 fill and empty the system multiple times.
6 Apply additives to prevent corrosion, fouling,
formation of mud and algae.
7 Fill the plant
8 do not use the unit pump.
9 Execute leakage test.
10 Isolate the pipes to avoid heat dispersions and
formation of condensate.
Leave various service points free (wells, vents, etc).
ATTENTION
⊲ Neglecting the washing will lead to several filter
cleaning interventions and at worst cases can cause
damages to the exchangers and the other parts.
6.14 Hydronic units and connection diagrams
recommended
The installer must define:
• type of components
• position in the system
See diagrams on the next pages.
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