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4.0 INSTALLATION - CISTERN FED
4.1 This method of installation must be used if the outlet is to be
connected to one or more conventional taps. It is not recommended
for supplying a shower. Individual site demands should be consid-
ered when choosing the number of outlets to be served.
4.2 A vent pipe must be connected to the outlet connection of the
heater.
The vent pipe must have a minimum internal diameter of 19mm.
The vent pipe must be unobstructed, rise continuosly and be
arranged to discharge into the cold water feed cistern.
DO NOT connect any pressure relief device to the vent pipe of
this water heater.
4.3 The cold water supply must be from a cold water feed cistern
complying with Water Byelaw 30. The maximum head pressure
must not exceed 20 metres.
4.4 It is recommended that a WBS Listed isolating valve is fitted on the
cold water supply to the heater.
4.5 The inlet must not be connected directly to the cold water mains
supply.
Diagram 3 Typical Cistern Fed
Installation
5
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