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clean heat technology
5-5.2 System Boiler Kit
A System Boiler Kit is supplied with each System Boiler, this may be placed within the
Boiler casing for delivery.
Fig. 5-5c Expansion Vessel
BFISC 24/30 and BWISC 16/25
FLEXIBLE HOSE
EXPANSION
VESSEL
BOILER RETURN
FLOOR STANDING SHOWN
INST
INST
INST
INST
INSTALLA
ALLA
ALLA
ALLA
ALLATION 5
TION 5
TION 5
TION 5
TION 5
5-5.3 Expansion Vessel
Boilers:- BFISC 12/24, BWISC 12/16, BWESC 12/16 and BFESC 12/24
The expansion vessel is supplied fitted to the boiler within the case.
On Floor Standing Boilers, to access the flue test point, the vessel can be lifted out from
the Boiler without the need to disconnect it.
Boilers:- BFISC 24/30 and BWISC 16/25
The expansion vessel is supplied separate from the Boiler. It must be fitted to the heating
return adjacent to the Boiler using a 22mm/½BSP/22mm T.
No valves or any other components must be fitted between the expansion vessel and the
Boiler.
All Boilers
Maximum pre-charge pressure 1.5 Bar
Maximum working temperature
90°C
Factory pre-charge pressure
1 Bar
Maximum working pressure
3Bar
Expansion Vessel Capacity 10 litres for maximum system expansion of 9 litres.
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