5 Pipe Connections
18
Pipe Connections
5
.1 Water Connections
Flow and Return Connections -
All models
On all models a 22mm push-fit
connection is provided for both the
heating flow and return connections.
H
oles are provided in the top and
bottom casing panels to route the
pipework as required.
All pipes to be fitted into the push-fit
connectors provided should be cut
using a pipe slicer or pipe cutter - to
leave the pipe ends with a slight
radius and free from any burrs or
sharp edges. Pipes to be used with
these fittings should not be cut
square using a hacksaw.
5.2 Water Connections –
System Models
A 15mm discharge pipe must be
connected to the safety valve outlet
connection. This pipe must be
unrestricted, i.e. no valves. The discharge
pipe should be run to the outside of the
building and terminate so that it cannot
cause injury to persons or property.
A 15mm double check valve ballofix
type valve is provided on the flexible
filling loop hose for connection of the
cold mains supply to the heating
system. The cold mains supply should
terminate inside the boiler casing.
A drain cock is fitted at the bottom on
the front of the boiler to allow the
heating system to be drained.
The expansion vessel is connected via a
flexible hose to allow it to be moved to
gain access to the burner and
condense trap for servicing. When
replacing the vessel, care should be
taken to ensure that the flexible
connecting hose is not twisted.
Figure 5-1: Non-system boiler flow and
return connections
Figure 5-3: Grant Vortex Eco Wall Hung boiler with front casing removed
Figure 5-2: System boiler Flow and
Return connections
!
NOTE
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