Combi 90 Outdoor Module
10
4 - BOILER INSTALLATION
1
If the boiler is to be fitted against the wall, prepare the
wall to accept the heating system pipework. To mark
the wall for drilling, refer to Fig. 1 for the positions of
the pipework openings in the enclosure sides.
Note: Pipework should be insulated where it
passes through the wall into the boiler enclosure.
2
The electrical supply to the boiler should be
routed through the wall in a suitable conduit,
such that it enters the boiler enclosure via one of
the pipework openings. The cable can be routed
to the front of the boiler, for connection to the
boiler control panel, either over the top or
beneath the boiler heat exchanger. Heat resistant
PVC cable, of at least 1.0 mm² cross section
should be used within the boiler enclosure.
3
The oil supply line should be installed up to the
position of the boiler. Refer to the main installation
and servicing manual for details. The final connection
into the boiler enclosure can be made with 10 mm soft
copper, routed along the base of the enclosure (either
between the enclosure and wall or in front of the
enclosure) to enter through one of the holes located in
the bottom edge of either side panel, at the front
(burner) end.
4
A remote sensing fire valve must be installed in the
fuel supply line a minimum of 1 metre from the point
of entry to the boiler, with the sensing head located
above the burner using the clip mounted on the
underside of the control panel.
Preparations for installation
4.2
Conventional flue
4.3
Where it is not practical to use the factory supplied
low level flue, the Grant range of Outdoor Modules
may be fitted with a conventional flue system.
A twin wall stainless steel insulated flue system is
available from Grant UK.
An insulated boiler connector elbow, complete with
test point, replaces the low level terminal and flue
guard supplied with the boiler.
The Grant External flue system connects to the elbow
and may terminate at high level or vertically as
required. See Fig. 5.
The flue system is suitable for use with class C2
kerosene and class D gas oil.
When using gas oil the flue must terminate a
minimum of 2 metres above outside ground level.
The following components are available from Grant UK.
Item
Starter elbow
150 mm extension
250 mm extension
450 mm extension
950 mm extension
195-270 mm adjustable extension
45° elbow
High level terminal
Vertical terminal
wall bracket
Extended wall bracket kit
Part No.
GKM90
GX150/90
GX250/90
GX450/90
GX950/90
GXA250/90
GE45/90
GTH90
GTV90
GWB90
GEB90