5
Traditional concentric flue system, Figure 3a, with a maximum length of
5000 mm. The flanged flue elbow is designed with 3° slope towards the
appliance so that the condensate can easily drain off. It has to be
considered that for every metre horizontal flue length the terminal exit
centreline is approx. 45 mm higher than the elbow's centreline.
The standard terminal is 755 mm long but can be cut to a minimum flue
length of 250 mm, which is suitable for single, 100 mm (4”), brick walls.
Ø60/100mm concentric
standard horizontal wall
terminal.
Max. length 5000mm.
Min. length 250mm.
The pluming from the flue may
cause nuisance to neighbours
or other buildings.
Horizontal terminal has a
built-in fall in the flue to allow
condensate to drain away.
If horizontal flue requires
extension pipe, the flue
should be installed such
that there is no section less than
2.5º – 3º to the horizontal.
93 flanged elbow (concentric)
with sampling point
Standard horizontal flue kit - Part no. 956083
Kit A
60/100 flue accessories:
0.5m flue extension duct - 956092
1m flue extension duct - 956093
93 flue extension elbow - 956091
45 flue extension elbow (2x) - 956090
Vertical flue turret - 956087
3a
(C13) - PART NO.956083
2.5.1
KIT A HORIZONTAL WALL TERMINAL
TERMINAL (C33) - HBL PART 956081
2.5.2
KIT B VERTICAL CONCENTRIC FLUE
Roof terminal
with rain cover
and pitched roof
flashing kit.
Vertical flue socket
with sampling point.
60/100 flue accessories:
0.5m flue extension duct - 956092
1m flue extension duct - 956093
93 flue extension elbow - 956091
45 flue extension elbow (2x) - 956090
Flat roof flashing plate - 956088
93 flanged flue elbow - 956086
Max. length12m.
Min. length 0.6m.
Kit B
Vertical flue kit - Part no. 956081
3b
Standard concentric (ø100/60) vertical flue application, Figures
3b, 3c, through roof attics with a maximum length of 12000 mm.
The kit comprises of the roof terminal, flashing kit, vertical
adaptor with sampling point and bracket.
The maximum length is measured from the top of the appliance
casing to the underside of the air cowl.
For installation details refer to the flue kit instructions.
Fig 3(c) Offset vertical flue.
‘a’ measured from the boiler centre line to the centre line of the
extension elbow.
‘b’ measured from the centre line of the extension elbow to the
underside of the air cowl.
Maximum allowable length of a + b = 8900 mm.
Roof terminal
with rain cover
and pitched roof
flashing kit.
a
b
3c
If the standard horizontal terminal is likely to cause nuisance to
neighbours or buildings, because of excess pluming, then this
particular flue kit raises the flue gas outlet point to a higher
elevation with the minimum amount of changes. The flue gas duct
is teed-off from the concentric part and covered by an 80 mm
outer tube to protect the flue duct from freezing. The air in-take
remains at the lower level (see Figure 3d).
If choosing this option then the external flue duct length should be
taken into account when calculating equivalent flue length.
For installation details refer to the flue kit instructions.
OUTLET (C53)
2.5.3
KIT C: RAISED EXTERNAL FLUE
32
45
HEAT EXCHANGER
Refer to Figure 46
a)
Ensure supply voltage is isolated, and that the gas supply is
isolated.
b)
Remove the gas control valve, fan & burner assembly; refer to
section 6.2.
c)
Remove the heat exchanger: refer to section 9.8.
d)
Disconnect the condensate drainpipe sump adaptor from the
heat exchanger; refer to section 9.12.
e)
Remove the existing flue hood from the heat exchanger, two
screws, and fit the replacement flue hood onto the heat
exchanger; use new flue hood seals; refer to Figure 46.
f)
Fit the condensate drainpipe sump adaptor to the heat
exchanger and flue hood.
9.9
FLUE HOOD
46
FLUE HOOD
Refer to Figure 47
a)
Ensure supply voltage is isolated.
b)
Disconnect the electrical lead from the sensor to be changed.
c)
Unclip the sensor from the pipe and remove.
d)
Clip the replacement sensor onto the pipe and position as
shown in Figure 47.
e)
Reconnect the electrical lead.
9.10
WATER TEMPERATURE SENSORS
return pipe 'O' rings and fibre washers and replace as necessary.
Ensure that all joints and seals are correctly re-fitted. If required
re-solder flow and return pipes.
q)
Re-fill central heating system and vent air from the system
using the manual air vent. Re-pressurise the system as necessary
and check for water leaks.
Note: It is likely that the heat exchanger will still
contain water.
47
FLOW SENSOR
g)
Unscrew the flue sensor from the existing flue hood and fit
onto the new flue hood; refer to section 9.16.
h)
Re-assemble in reverse order; check integrity of the flow and
return pipe 'O' rings and fibre washers and replace as necessary.
Ensure that all joints and seals are correctly re-fitted.
i)
Re-fill central heating system and vent air from the system
using the manual air vent. Re-pressurise the system as necessary
and check for water leaks.
