Electrical Connections - Hamworthy Purewell VariHeat he Installation, Commisioning And Maintenance Instructions

Open Vented Systems
Boilers must not be capable of isolation from the vent pipe. Valves between boiler and vent pipe to be three way
type such that when boiler is isolated from vent pipe it is open to atmosphere. Safety valves should be mounted
on the boiler using the connection provided.
Sealed Systems
Boilers must not be capable of isolation from the safety valve. Valves between boiler and safety valve to be three
way type such that when boiler is isolated from safety valve it is open to atmosphere. Hamworthy Heating Ltd
provide a connection on the boiler for the safety valve .
Where using Hamworthy Heating Ltd pipework kits, assembly of these is detailed in the Instruction manual
supplied with kit.

5.3 Electrical Connections:

The following electrical connections are provided on each module on a rail at the base of the front of the boiler.
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Supply: Live, Neutral and Earth. See Section 4.6 for details.
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Live and Neutral connections for Shunt pump or Primary Pump
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Boiler Overheat Fault Alarm Signal Output
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Common Fault ie A Boiler Ignition Lockout Or Fault Alarm Signal Output
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Boiler Normal Run Signal Output
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Remote On/Off
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0-10v Analogue Control Signal Input
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External sensors
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Cascade Management of Multiple Boiler Installations
HAMWORTHY HEATING LTD
12
PUREWELL VariHeat he 500001155/F