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Gravity fed supplies
The BSM MUST be fed from a cold water storage cistern and hot water cylinder
providing nominally equal pressures.
Note! For gravity fed supplies you must remove the hot and cold inlet flow regulators
and the outlet flow regulator to make sure that the maximum flow rate is achieved.
Refer to section: 'Maintenance, Flow regulator Removal'.
Mains pressurised instantaneous hot water supplies, heated from a thermal
store
Packages of this type, fitted with a tempering valve can be used.
A drop tight pressure reducing valve MUST be fitted if the supply pressures exceed
5 bar maintained.
An expansion vessel MUST be fitted (and regularly maintained) if any form of backflow
prevention device is fitted, e.g. non-return valve, PRV. This will ensure that excess
expansion or pulse pressures do not damage the product or the plumbing system.
The expansion vessel may already be fitted externally or internally within the thermal
store (check with thermal store manufacturer).
COLD HOT
10
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