HAMWORTHY HEATING LTD
42
Wessex ModuMax
mk3
Boilers
500001308/C
C1.8 Location
The flue system must not be placed or fitted where there is undue risk of accidental damage to the flue pipe or
undue danger to persons in the vicinity. Check that the flue and chimney are clear from any obstruction. Wessex
ModuMax boilers are suitable for installation in a balanced compartment in accordance with the requirements of
BS 6644. Consult Hamworthy Heating Technical Department for help or assistance if in doubt.
C1.9. Condensate Discharge
Due to the high thermal efficiency of the boiler,
condensation will occur within the boiler casing
during firing from cold conditions. A drain with an
integral trap is fitted to the rear of each module
suitable for connection to a 32mm plastic waste
pipe (not Hamworthy Heating Ltd supply), which
must be connected to a tundish (not Hamworthy
Heating Ltd supply). Discharge piping from a
tundish should be of synthetic material due to the
mild acidity of the condensate (pH3
-
5), with all
discharge piping having a minimum fall of 30mm/m
away from the boiler. Consideration should be
given to possible freezing of condense water traps
and pipework. This must be avoided at all times by
routing pipework within the building, where
possible. In addition to the above the stacked
module arrangement flue boxes are supplied with a
trap terminating in a 32mm i.d. connection, which
should be connected in a similar manner to a
drain.
Figure C1.1.1 Flue Resistance
Model
Flue
Dia.
(mm)
Max Flue
Length
(m)
Equivalent
Length (m)
90°
Equivalent
Length (m)
45°
97/97
116/116
100
15
1.5
1.2
147/147
150
43
2.4
1.8
196/196
28
254/254
22
97/194c
180
101
2.8
2.1
97/291c
41
116/232c
180
85
2.9
2.2
116/348c
35
147/294c
250
163
4.4
3.4
147/441c
69
196/392c
94
196/588c
36
254/508c
250
110
4.6
3.5
254/762c
44
Connection of 100mm dia. Ducts — Open Flue Systems
Refer to Figure C1.1.2. Fit the flue components on route to the terminal discharge taking care not to damage the
flue seal when assembling the flue components, and ensuring a minimum 2° slope and that the flue system is self
supporting using wall brackets where necessary. In terminating the flue system, ensure that the joint through the
wall / roof is made good and weatherproofed.
Important
-
In fitting the HHL supplied 100mm dia. Ducts to a stainless steel flue system,
the flue system must have it’s own condense drain. The system must not be allowed to
drain back through the HHL supplied components.
