Boiler Assembly Instructions; Figure 5.2.1 Twin Duct Connection; Figure 5.2.2. 4 Single Milborne 382 / 502 Flue Installation Room Sealed - Hamworthy MILBORNE381 Series Design Installation, Commissioning And Operating Instructions

5.0 BOILER ASSEMBLY
5.1 General
Boilers are despatched to site as fully assembled units. The flue header (where applicable) and frame / pipework
set (where applicable) are the only items that will need assembling on site.
During assembly it is important to take care to prevent damage to the boiler casing.
Boiler positioning must allow the minimum clearances detailed in Section 3.0 to facilitate access for flue and
pipework connections as well as maintenance. The boiler must be installed on a solid masonry wall using the
mounting bracket supplied. To locate the boiler on the wall, a cardboard template is provided in the boiler
packaging.
•
Place the template supplied with the boiler on the wall, at a height of approximately 140 cm from the
ground, using a spirit level to ensure that the mounting holes are horizontal.
•
Secure the template on the wall temporarily and mark the boiler's mounting holes on the wall
•
Drill the holes and install the screw anchors supplied with the boiler.
•
Secure the wall mounting bracket and carefully lift the boiler onto the bracket.
Health and safety. Due to the weight of the boiler, care must be taken when lifting onto the mounting bracket.
Note: when installing multiple boilers, the Master boiler must be placed closest to the heating system to allow
correct location of the mixed flow sensor.
5.2 FLUE SYSTEM
5.2.1 Room Sealed Flue Installations Type C
Figure 5.2.1 shows the twin pipe flue connection for a Milborne 502 boiler. This allows the air supply and the flue
to be piped using separate ducts for room sealed applications.
It is important that horizontal flue terminals
discharges are positioned in accordance with the
requirements detailed in Figure 4.3.
Air supply inlets must be positioned at least 300 mm
from flue terminals to prevent flue gas re-circulation.
Hamworthy Heating recommend that flue terminals
discharges are positioned higher than air inlets.
For C twin type pipe installations the maximum
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equivalent length of 30 metres includes both the
requirements for the air inlet pipe and flue pipe.
To comply with the requirements of the Clean Air
Act 1956 a maximum of 150 kW may be terminated
with horizontal flue discharges.
5.2.2 Components for Individual Flues per Boiler Module
50 mm diameter self extinguishing flue components for use with Milborne boilers.
For use on applcations consisting of B
boiler house, and C
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ducted to the boiler.
Maximum equivalent length for this flue system is 30 metres from boiler to terminal for B
air inlet terminal to flue terminal for C
Equivalent lengths for 90° bends is 4 metres with 3 metres equivalent length for a 45° bend.
HAMWORTHY HEATING LTD
type flue configurations, where combustion air is taken from within the
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room sealed twin duct systems where combustion air is taken directly from outside and
applications.
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- Twin Ducts
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Figure 5.2.1 - Twin Duct connection
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MILBORNE
applications, and from
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500001130/J