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12
4.3
PREPARING THE BOILER
a)
Remove the front painted door by sliding it towards the top of
the boiler and then away from the boiler.
b)
Remove the right hand portion of the case by unscrewing the two
(upper and lower) screws (C) (Fig. 15) and sliding the case away
from the appliance.
c)
Remove the four screws securing the left hand case (D).
Remove the case by sliding it forwards away from the appliance.
15
INNER CASING REMOVAL
i)
Cut the hole in the wall for the flue/air duct. The diameter
should not be less than 100mm (4in) and must be horizontal.
If the hole is not accessible from the outside of the building, its
minimum diameter should be sufficient to allow the insertion
for the wall liner (130mm (5
1
/
4
in) diameter) which will be
sealed with mortar. Refer to Fig. 20
(The wall liner is available as an optional extra.)
j)
Accurately measure the wall thickness, and note this
dimension for use later.
k)
Remove wall mounting bracket from back of boiler by
releasing over-centre clamps on top rear of boiler
l)
Secure the wall mounting bracket in position using the screws
provided. Ensure that the bracket is the correct way up.
4.4
MOUNTING THE BOILER
Lift the boiler into position, the rear bottom edge of the boiler
locates onto the bottom return of the wall plate. The top of the
boiler is then pushed back against the top of the wall plate and
the “over centre” clamps are located in their rectangular holes in
the top of the wall plate, clamped in position and secured with the
two split pins provided in the fixing kit.
Remove the combustion chamber front panel by pulling it
forwards out of the appliance, ensure the four flue baffles are
positioned correctly with their top being flat onto the top of the
heat exchanger fins (Key No. 67-Fig 8 page 6).
Remove and discard the wire that retains the heat exchanger baffles.
Replace the combustion chamber front panel ensuring it is fitted
correctly into the two side guides. Refit the left hand case with the
four screws previously removed.
4.5
AIR FLUE DUCT INSTALLATION
4.5.1
PREPARING THE AIR/FLUE DUCTS
If the wall thickness is less than 800mm (31in) the air/flue duct
may be fitted without access to the external wall providing that the
optional wall liner is used. (This is necessary to seal any cavity and
to allow the sealing ring to pass through from inside but still open
and provide an adequate seal). The wall liner has a tube diameter
of 130mm with a wall thickness of 0.8mm.
a)
Measure the required flue length as shown in Figure 16. Refer
to section 2.5 to determine whether any extension kits are
required. Installations using only the standard ducts or
standard ducts with straight extensions are described in this
section. Installation instructions for all other flue systems are
described in the supplements at the rear of this booklet.
b)
Fit the external sealing ring to the terminal assembly and
assemble the air/flue ducts as shown in Figure 17. The
standard duct is always used at the entry/exit to the boiler,
and the sliding (telescopic) terminal is always slid into the end
of the standard or extension duct (where appropriate).
c)
Achieve the correct flue length using Figure 18 as a guide.
Note that the flue length is measured to the inside of the
external wall sealing ring. In most cases it will be possible to
achieve the required flue length without cutting the ducts,
however where necessary the plain ends of the extension ducts
may be cut.
Never cut the swaged end
, and always
ensure that the cut is square and free of burrs or debris. The
minimum overlap of the telescopic section is 50mm (2in).
d)
Assemble the flue using Figure 19 as a guide. It is important
that the steps are carried out in the order stated in Figure 19.
When securing the ducts in position always drill two 3.3 mm
diameter holes in each extension air duct joint and use the self
tapping screws provided to secure each joint.
NOTE IT IS ESSENTIAL THAT THE TERMINAL IS FITTED THE
CORRECT WAY UP See Fig 17 (i.e. rainshield at the top).
16
MEASURING THE EXACT FLUE LENGTH
FAN OUTLET
EXTERNAL
Dia. 60mm
•
TOTAL FLUE LENGTH FROM
FLUE OUTLET CENTRE TO
OUTSIDE WALL FACE:
= LENGTH
L
WALL
L
•
•
•
•
D
C
C
CONTROL
KNOB
