HAMWORTHY HEATING LTD
MILBORNE 500 SERIES
500001130/A
11
8.0 Flue Gas System
Available for the following flue types
B23 Conventional open flue system drawing combustion air from the room the boiler is installed within.
C63 Room sealed, twin duct, using separately approved flue components for the air supply and flue discharge.
Note: Balanced flues using concentric ducts are not available or approved for this boiler.
Each heat generator (module) inside boiler
assemblies Milborne 501/502 has been validated
equipped with a self-extinguishing polypropylene
flue gas exhaust system (1) with glass-shaped
connections.
As for the air supply system, since boiler assemblies
Milborne 501/502 have been validated as type B or
type C assemblies, air can be taken directly from the
boiler room through specific vacuum pipes (2).
Flue systems must be designed and installed in accordance with the requirements of the relevant standard:
BS5440 for single Milborne 501 installations
BS6644 for single Milborne 502 and multiple boiler installations
Flue Maximum Length.
Each 50 mm flue pipe maximum equivalent length is
30 metres with a maximum 4 metre flow resistance
for each 90° bend and 3 metres for a 45° bend.
Open Flue Installations type B23
Figure 8.1 shows the configuration of a single
Milborne 501 boiler installation using the B23 open
flue arrangement. In this application combustion air
is taken directly from the boiler house.
Figure 8.2 shows the configuration of a single
Milborne 502 boiler installation using the B23 open
flue arrangement. In this application combustion air
is taken directly from the boiler house.
For B23 type open flue arrangements with air intake
from boiler house the maximum equivalent flue
length of 30 metres includes only the flue pipe.
Note: Consideration must be made for the
prevention of condensate from freezing within
the condensate trap at the base of the flue.
Locating the condensate discharge kit to the
horizontal flue section within the building may
provide a suitable solution.
Figure 8.1 - Single Milborne 501 Flue Installation. Related Standard BS5440 Part 1
Milborne 501
Milborne 502
Figure 8.2 - Single Milborne 502 Flue Installation. Related standard BS6644