Alarko SUPER FIT 24, Инструкции по сборке, установке и эксплуатации

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4.5 Water Connections
I In order to safeguard the heat exchanger and circulation pump, especially
in case of boiler replacement, it is recommended that the system is hot-
flushed to remove any impurities (especially oil and grease) from the
pipes and radiators.
Make sure that the domestic water and central heating pipes are not used
to earth the electrical system. The pipes are totally unsuitable for this
purpose.
Isolation valves must be installed on the Heating and DHW circuits. This
will facilitate all maintenance and service operations where boiler needs
to be drained.
The fitting placed under pump (Figure 16 – see Detail A) must be tightened
with torque of maximum 18 Nm in case of rubber gasket use. This value
is 30 Nm in case of cylinder head gasket use.
• To prevent vibration and noise coming from the system do not use pipes
of reduced diameter, short radius elbows or severe reductions in the cross
sections of the water passages.
Domestic hot water circuit
• In order to prevent scaling and eventual damage to DHW heat exchanger,
the mains water supply must not have a hardness rating of more than 17,5
French hardness. It is nevertheless advisable to check the properties of the
water supply and install the appropriate treatment devices where necessary.
The cold water supply pressure at the inlet to the boiler must be between
0.5 and 10 bar.
HF HWO G CWI HR
Figure 16. Water connections