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4 .7
Connections on the domestic water side
7651255 - v.01 - 23052016
This must be done in accordance with the current standards and local
regulations.
The maximum operating pressure of the heat exchanger in the hot water
boiler is 8 bar.
4 .7 .1
Special precautions
For the hydraulic connection it is absolutely essential that the supply lines
be flushed to prevent metal filings or other particles from entering the
boiler.
4 .7 .2
Combination inlet group
Attention
According to the safety regulations, a combination inlet group must
be installed on the cold water inlet of the domestic water heating
circuit.
Maximum pressure of the combination inlet group: 8 bar
Include the combination inlet group in the cold water circuit.
4 .7 .3
Shut-off valves
The primary and secondary circuits must include shut-off valves so
they can be isolated for convenient maintenance of the domestic water
heating circuit. Through use of these shut-off valves it is possible to
perform maintenance on the boiler and the components without having
to empty the entire system. Moreover, these shut-off valves make it
possible to isolate the domestic water heating circuit in the installation to
perform pressure testing at pressures higher than the permitted operating
pressure.
Attention
When connecting to copper pipes, a coupling made of steel, cast
metal or an insulating material must be used between the hot water
outlet of the boiler and this pipe to fully eliminate the possibility of
corrosion of the connection.
4 .7 .4
Cold water/domestic water connection
The connection to the cold water supply must be made as shown in the
diagram on page 11. A drain and a funnel for the safety fittings must be
present in the boiler room. The parts used for connection to the cold
water supply must comply with the local standards and regulations. A
combination inlet group must be installed in the cold water supply.
4 .7 .5
Tap water mixing valve
In combination with solar collectors, we recommend the installation of a
thermostatic tap water mixing valve.
4 .7 .6
Hot water recirculation line
See
Page 13.
4 Installation
HFS 650 / HSF 700
21
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