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Upper Plate
R e
a r
F lu
e -
D r
Lower Plate
Fig. 16
Fig. 19
Flow Pipe
Keep Flue
Uppermost in
Hole
Fig. 21
2
Fig. 22
Template
il l
H o
le
Ø 1
2 5
m m
U p
p e
r P
la t
e
L o
w e
r P
la t
e
Wall Thickness +17 mm
Fig. 18
Priming
Inlet
Pipe
Locate Slots in
FGHR on Tabs
1
2
1
3
Fig. 23
Flue in Sliding
Collar
Wall
Thickness
+17 mm
Fig. 17
Foam Seal
Fig. 20
Direct Rear Flue
fitted to FGHR
4.0 Installation
4.3
Installation - Horizontal Direct Rear Flue
7210434
IMPORTANT: Follow the Installation & Servicing
Instructions supplied with the boiler to the point at
which the wall plate is fitted, but do not mark the flue
position. The Assure FGHR must be fitted on a flat
vertical surface.
1. Align the Assure FGHR template on the wall (Fig. 16)
and mark the positions of suitable fixing points on the
upper and lower plates of the wall frame.
2. Drill & plug the fixing points. Cut the hole for the flue
Ø150 mm. Measure the wall thickness and add 17 mm.
Adjust the telescopic flue to length after locating and
securing it in the sliding collar with the screws supplied.
Tape and secure the flue (Fig. 17).
3. Apply the self-adhesive foam from kit 7215374 to the
rear face of the sliding collar (Fig. 18). Wrap the foam
around the flue twice. Engage the flue & collar in the
channels on the frame (Fig. 19).
4. Insert the flue into the Ø150 mm hole and secure the
frame assembly to the wall, ensuring the flue is uppermost
in the hole by pushing up the sliding collar. Hang the boiler
on the lower plate (Fig. 20). Prime the boiler trap by
pouring 300 ml of clean cold water into the central spigot.
Do not allow any water to spill into the air chamber.
5. After identifying the FGHR inlet and flow pipes (Fig. 21),
manoeuvre them into place behind the boiler.
6. Undo the screws securing the rear flue adaptor and
remove the adaptor. Retain the screws & adaptor for reuse.
Extract the blanking cap and discard, recycling where
possible. Refit the adaptor and secure with the screws
previously removed (Fig. 22).
7. The Assure FGHR can now be fitted (Fig. 23). Locate
the slots in the rear of the FGHR on the tabs of the
flue collar & upper plate. Lower the FGHR to engage
the flue connection on the underside with the boiler
adaptor, taking care to not displace the seals.
8. As the FGHR is lowered the flue & collar assembly
will slide down the channels to the lowest position.
9. Connect the flow & inlet pipes to the fittings on the
underside of the FGHR unit ensuring that the sealing
washers are in place.
10. Continue with the installation and commissioning of
the boiler.
9
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