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7.3 Flow and return connections
Use T-pieces for externally mounting the
pressure relief valve and the boiler bleed valve
for servicing the boiler. We advise to install two
service valves in the flow and return pipes
underneath the boiler, so the boiler can be
isolated from the heating system and eventually
disconnected, when needed.
When using a system pump, this pump should
always be mounted in the return pipe of the
heating system.
Do not use chloride-based fluxes for soldering
any pipes of the water system.
7.4 The expansion vessel
The capacity of the expansion vessel must be
selected and based on the capacity of the
central heating system and the static pressure.
Suggested is to fit the expansion vessel in the
return pipe of the central heating system. It can
be combined with the drain valve for service.
See the drawing.
7.5 Pressure relief valve
The boiler has no internal pressure relief valve. This should be installed close to the boiler in the flow pipe of the
heating system. When having cascaded boilers, each boiler should have its own pressure relief valve.
It is recommended to install service valves, so the boiler can be isolated from the heating system, when needed.
Make sure that the pressure relief valve is mounted between the boiler and the service valves.
The specifications and size of the relief valve should be determined by the installer and must comply with all
applicable regulations and boiler capacity.
The condensate trap must
always be filled to the edge
with water, before replacing
to the unit.
Pressure
relief valve
Boiler bleed
valve for service
Boiler
service valves
BOILER
EHS.T0501.100
Summary of Contents for S-CBX 105
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