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INSTALLATION & SERVICING INSTRUCTIONS
18
MOUNTING FRAME FIXING &
FLUE OPENING
6-720-611-730b (12.05)
CAUTION: Ensure there are no pipes,
electric cables, damp proof course or other
hazards before drilling.
SAFETY:
All relevant safety precautions must be undertaken.
Protective clothing, footwear, gloves and safety
goggles must be worn as appropriate.
MOUNTING FRAME/PIPEWORK POSITIONS:
A - Mounting frame.
B - Manifold connections.
C - Mounting frame fixing point.
D - Wall.
E - Gas and water pipework (not supplied).
F - Boiler.
FIXING THE MOUNTING FRAME:
Position the mounting frame (A) on the floor
against the wall with manifold connections (B)
facing away from the wall (D) ensuring there is
enough space for the pipework (E).
Allow the minimum space from each side of the
frame (A) for the boiler overhang (F) and minimum
service clearance, as shown.
Ensure the mounting frame is level and mark
fixing points (C).
Secure mounting frame (A) to the floor using
appropriate fixings (not supplied).
Clear any debris from the site.
FLUE OPENING:
Follow the diagram opposite to mark the centre
of the flue (1, & 2) for rear opening, (2 & 3) for
side opening or (1 & 4) for top opening.
Measurements shown include the minimum
service clearances.
* IMPORTANT: for horizontal flues, increase
this height by 52mm for every 1000mm of
horizontal length that the flue opening is away
from the boiler
NOTE: all horizontal flue sections must rise away
from the boiler by 52mm per meter to ensure that
condensate flows back into the boiler for safe
discharge via the condensate waste pipe.
Cover the mounting frame manifold assembly
(A) to protect the valves.
Make an opening (X, Y or Z) through the wall
using a core drill or similar at a size relative to
the wall thickness as shown below:
Wall
Flue opening
thickness
60/100mmØ
150 - 240mm
125mmØ
240 - 330mm
130mmØ
330 - 420mm
135mmØ
420 - 500mm
140mmØ
Where the flue terminal can only be fitted from
inside the building, increase the opening to
150mmØ to allow the optional weather collar
to fit through the opening.
Clear away any debris.
MOUNTING FRAME FIXING &
FLUE OPENING
2
1
3
4
38mm
Z
X
Y
123
343
123
730*
+18
X
Y
Z
All dimensions in mm
110
65
98.5
65
65
C
B
A
A
D
E
267
B
B
21
F
D
D