Central Heating To Boiler Connections - Wolf ComfortLine CHK Installation And Maintenance Instructions Manual

Connect the heating flow and return to the
respective boiler fittings. For connections,
see below.
Install a check valve downstream of the
boiler circuit pump(s) to prevent incorrect
circulation.
Install a safety assembly com-
prising a safety valve with a
response pressure of 3 bar and
an automatic air-vent valve.The
pipework between the boiler
and the safety valve must not
be able to be shut off. Severely
excessive boiler pressure due to
excessive boiler temperatures,
can burst the boiler body or the
boiler pipework, which would
lead to a sudden excape of hot
water (risk of scalding).
Connect any underfloor heating
system via a three or four-way
mixer.
Connection for venting
and safety flow
Filling / Draining
Central heating boiler connections
20
Central heating boiler connections
Note
Return temperature raising facility
Note
Provide system separation by
means of a heat exchanger,
when using pipes which are not
impermeable to oxygen.
This boiler is only suitable for
heating systems with pumped
heating circuits. If no heating
circuit pump has been installed,
sufficient circulation through the
radiators cannot be ensured,
putting the room heating in
question.
Recommendation: Convert
open systems into sealed
systems.
Heating systems with large
water volume (above 20 litres
per kW output) require a re-
turn temperature of 30 °C, as
otherwise the longer heat-up
time of such systems would
create condensate and run an
increased risk of boiler body
corrosion.
Boiler return
Boiler return
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