Plumbing Connections - Ferroli MACH Instrucciones De Uso

2.3 Plumbing connections

For correct operation it is necessary to install a hydraulic separator between the unit and the system as indicated in
fig. 35.
A pump external to the unit must not be used in the generator hydraulic loop (1), as the circulation of heat transfer fluid
in the loop (1) is ensured by the circulating pumps inside the unit and managed by its control system. An adequately
sized external pump must be provided for circulation only in the system hydraulic loop (2).
The unit's internal circulating pumps are sized for circulation only in the generator hydraulic loop, and
A
cannot be used for direct circulation in systems without a hydraulic separator.
The heating capacity of the unit must be previously established by calculating the building's heat requirement according
to current regulations. The system must be provided with all the components for correct and regular operation. In par-
ticular, provide for all the protection and safety devices required by current regulations. They must be installed on the
hot water circuit flow piping, upstream of the hydraulic separator, within a distance of not more than 0.5 m, without in-
terposing shutoff devices. The unit is not supplied with an expansion vessel or safety valve, therefore their con-
nection must be carried out by the installer.
The safety valve outlet must be connected to a funnel or collection pipe to prevent
B
water spurting onto the floor in case of overpressure in the heating circuit.
Otherwise, if the discharge valve cuts in and floods the room, the boiler manufac-
turer cannot be held liable.
Do not use the water system pipes to ground electrical appliances.
Before installation, flush all the pipes of the system thoroughly to remove
B
any residuals or impurities that could affect proper operation of the unit. Use
chemical conditioners suitable for the purpose; i.e. able to remove from the walls
and bottom of the pipes and the various components of the system, sludge, metal
oxides and, in low temperature systems, also biomass, with just the circulation of
the water, with system hot and/or cold. The products used must not be corrosive
and/or aggressive for metals and plastics and must not significantly alter the natu-
ral pH of the water.
310
fig. 35
cod. 3541V120 - Rev 00 - 09/2021
MACH
EN