INSTALLATION INSTRUCTIONS
See below typical layout of a pumped central heating hot water circuit with gravity.
Feed and
Expansion Cistern
Cold Water Storage Cistern
Two port
normally open motorized valve controlled by cylinder thermostat
Heat Leak radiator with two full way lock shield valves
Thermostatic radiator valves | Programmable room |
to provide temperature zoning | thermostat |
Double Feed 
indirect cylinder
High limit pipe thermostat to bring on circulator in an overheat situation
Low limit pipe thermostat
to prevent the pump coming on until a minimum temperature is reached
Pump and 
isolating valves
Injector tee
to pump assist the thermosyphon circuit when the pump is operating
Yeoman High Output Boiler
installed to BS8303, ADJ and these installation instructions
See below typical layout of a fully pumped central heating and hot water circuit.
| Cold Water |
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| Storage Cistern |
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| Feed and |
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| Expansion Cistern |
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| Double Feed |
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| indirect cylinder |
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| Circulator and |
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Two port |
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normally open motorized valve |
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controlled by room thermostat |
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and programmer |
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Yeoman High |
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Output Boiler |
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installed to |
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BS8303, ADJ and |
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these installation | High limit pipe thermostat |
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instructions |
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Low limit pipe thermostat |
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| to bring on circulator in an |
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| to prevent the pump coming on until a minimum temperature is reached | |||||||||||||||||
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| overheat situation | |||||||||||||||||
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