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9.1.4 The combustion air inlet duct must not pass
through the cabinet panel by more than 50
mm.
9.1.5 When the DJL model is to be used as a type
B22 appliance i.e. combustion air being taken
from the space to be heated, a protection
grille complying with IP 20 must be installed at
the inlet point of the cabinet (see figure 10).
9.1.6 Attention must be given to properly seal the
mounting flange of the heating module.
9.1.7 A gas service inlet (PVC) sealing ring is also
provided for the appliance for size Rc 3/4 or
5/4). The hole size required for this seal ring
in the casing is Ø 50mm or Ø 75mm.
All cables and wires passing through the
casing of the burner/controls section should
be via strain relief bushings. It is
recommended that sealing is accomplished
by the use of the sealed ring type.
Connections between the burner module
controls compartment must be effectively
sealed from the appliance air-stream so the
pressure within the compartment remains
neutral.
9.1.8 A viewing port for the purpose of ascertaining
the operation of the burner should be
included. The viewing port may be located
behind a door or panel provided that when the
door or panel is opened the combustion circuit
remains in its
“sealed”
condition so that
burner operation is not upset.
Table 5 : Maximum cabinet air leakage rates
DJL
Heat input
KW (gcv)
Allowed leakage
m
3
/h @ 50Pa
8030 06
37.00
18.50
8045 09
56.00
25.00
8050 06
62.00
25.00
8060 12
74.00
25.00
8075 09
91.50
25.00
8075 15
91.45
25.00
8090 18
109.88
25.00
8100 12
120.00
25.00
8125M.15
153.47
25.00
8150M.18
182.91
25.00
8175M.21
211.76
25.00
8200M.24
244.17
25.00
Table 6 :
Centre distances combustion air inlet flue
outlet
Model
Connection
Ø
(mm)
Centre
distance B
(mm)
Cabinet hole
size
required for
sealing ring
(mm)
8030 06
100
140
112
8045 09
130
225
142
8050 06
130
225
142
8060 12
130
225
142
8075 09
130
225
142
8075 15
130
225
142
8090 18
130
225
142
8100 12
130
225
142
8125M.15
130
225
142
8150M.18
130
225
142
8175M.21
130
225
142
8200M.24
130
225
142
Figure 10: Arrangement for class B22
appliance & gas service inlet