HAMWORTHY HEATING LTD
18
FLEET H series
500001212/F
5.0 BOILER ASSEMBLY
5.1 General
Boilers are despatched to site as fully assembled units. The flue components (where applicable) and pipe work
kit (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 pipe
work connections as well as maintenance. The boiler must be installed on a solid floor. In locating the boiler a
pallet truck is recommended so as to avoid damage to the casing parts
Health and safety.
Due to the weight of the boiler, care must be taken when manoeuvring the boiler. HHL
suggest the use of a pallet truck
5.2 Water Connections
The connections provided on the boiler (refer to Appendix E and figure 4.4) are suitable for direct connection to
the system pipe work. However HHL recommend the use of individual isolating valves, which should be fitted to
each module to enable isolation from the system. However, the arrangement must comply with the requirements of
BS 6644.
When installing water system pipe work, it must be self supporting and care must be taken to ensure that undue
stress is avoided on the boiler flow and return connections. It is recommended that unions are fitted local to the
boiler and outside of the casing, to permit future servicing requirements.
Each module is fitted with safety valve rated at 6bar. The valve discharge pipe is routed to the rear of the boiler,
where it must be piped to discharge via a tundish (not HHL supply) suitably located for ease of visibility.
The Fleet is designed to operate at 20°C
∆
T across the flow and return. Should the flow rate drop, the boiler
controls will modulate the burner to maintain 20°C
∆
T. The boiler module is fitted with a single speed circulating
pump and flow is controlled through a balancing valve, which must be checked and set during commissioning. As
a safety precaution, a flow switch is fitted to the boiler heat exchanger to shut the system down in the event of
sudden adverse flow conditions.
Where using Hamworthy Heating Ltd pipe work kits, assembly of these is detailed in Instruction Manual
500005132 supplied with kit.
5.3 Flue Connection
5.3.1
The Hamworthy Fleet boiler is designed for use with the following flue systems supplied by Hamworthy - see Appendix C
80/125mm concentric room sealed, balanced flue system for rear/side through the wall discharge.
100/150mm concentric, room sealed, balanced flue system for remote discharge, horizontal or vertical.
100/130 & 150mm separate air and flue ducts, room sealed, balanced flue system for remote discharge.
100/130 & 150mm flue duct, for connection to an open flue (chimney) system.
Flue systems should be designed with reference to
BS 5440
part 1
,
IGE/UP/10
and
Third Edition of the 1956 Clean Air
Act Memorandum.
5.3.2
Flue installations can be configured to suit a number of applications, see Appendix C, but must comply with one of the
following options:
Room
Sealed.
Type C13: Horizontal balanced flue.
Type C33: Vertical balanced flue.
Type C53: Separate intake and discharge ducts terminating in different pressure zones.
Open
Flue.
Type B23: Intake from ventilated plant room and discharge via horizontal/vertical flue.
For room sealed applications, the flue ducts must be supplied by HHL.
For open flued applications, it is advisable to use the HHL supplied ducts to the point of conenction to a chimney.
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