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Installation requirements
Installation of the Greenstar regular boiler range must
be in accordance with the relevant requirements of the
Gas Safety (Installation Use) Regulations (as amended),
current IEE Wiring Regulations, local Building Regulations,
Building Standards (Scotland) regulations and bylaws of
the local Water company and Health and Safety Document
No. 635 (Electricity at Work Regulations 1989). It should be
in accordance with the relevant recommendations of the
following British Standards:
BS 6798; BS 5449; BS 5546:1; BS 5440:1; BS 5440:2;
BS 6891.
Gas Safety (Installation and Use) Regulations. All gas
appliances must be installed by a Gas Safe registered
person in accordance with the above regulations. Failure to
install appliances correctly could lead to prosecution.
The manufacturer’s notes must not be taken in any way as
overriding statutory regulations.
It is important with an aluminium heat exchanger that the
pH level of the water does not exceed 8. Levels in excess of
this could be detrimental to the heat exchanger.
The use of a suitable inhibitor will provide a resistance
to this. Contact Sentinel (Tel: 0800 3894670) or
Fernox (Tel: 01799 521133) for further details.
Sealed primary systems
The appliance is fitted with a manual reset high limit
thermostat and is suitable for use with a sealed
primary system.
The system should be installed in compliance with the
requirements of BS 5449: Part1. The system must be fitted
with a spring loaded safety valve set to operate at 3bar
(45 psi) and the pipe connections made through the system
must be capable of sustaining a pressure of up to 3bar.
Manual air vents should be fitted at any high points in
the system.
The following is a list of major items which must be fitted
to the system:
1. Safety valve – 3bar
2. Pressure gauge – 0 - 4bar
3. Expansion vessel
4. Automatic air vent
System filling and make-up
To comply with the Water Authority requirements, the
system should be filled via a temporary hose connection
to the mains cold water supply, with a double check valve
assembly and test point fitted to the mains water side of a
temporary circuit.
Valves and joints
It is very important that all valves and joints are able to
sustain a working pressure of up to 3bar (45psi). Particular
care should be exercised when fitting radiator valves and
only those of high quality to BS 2767:10 should be used.
All other valves and fittings should comply with BS 1010.
Loss of water pressure from a sealed system will require
continuous recharging with fresh water and consequential
introduction of air. Air is highly corrosive and will
considerably reduce life expectancy of radiators,
pumps etc.
Plastic pipework
The use of plastic pipework is acceptable. However, some
plastics are permeable to oxygen and must be avoided.
Only pipework with a polymeric barrier should be used.
Please note that the first 600mm of pipework connected to
the boiler must be of copper or steel.
Typical fully pumped sealed system
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