Hamworthy Sherborne Series, Installation, Commissioning And Servicing Instructions

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HAMWORTHY HEATING LTD
9
SHERBORNE 500001167/E
5.0 SITE LOCATION & PREPARATION
5.1 Site Location.
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The wall, floor or plinth for the boilers, frames & water manifold kit must be both flat & level to ensure correct
alignment of fittings & connections.
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The wall or floor must be sufficiently strong to support the weight of both the boilers & manifold kit where used.
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The wall or floor must be fireproof in accordance with BS 6644.
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The plantroom must have sufficient space for installation of boilers, manifold kits, pipework, pumps, controls, flues,
ventilation, access & servicing, & other items of plant.
5.2 Gas Supply.
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Gas supply pipes must be in accordance with BS 6891 or IGE/UP/2
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Gas supply connection to the boiler must not be smaller than the connection on the boiler - Rp 3/4”
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Gas installation must be soundness tested to BS 6891 or IGE/UP/1 & IGE/UP/1A.
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Gas installation must be purged to BS 6891 or IGE/UP/1 & IGE/UP/1A.
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Inlet gas pressure to boiler for Natural Gas should be nominal 20mbar (minimum 17.5mbar) dynamic at the
connection to the boiler. Refer to Appendix A for LPG.
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Boiler house gas isolation valve must be clearly identified & installed close to the entrance / exit.
5.3 Water Supply & Return
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Feed & Expansion tanks to comply with static height requirements of BS6880 & BS6644.
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Cold feed & open vent pipes to comply with requirements of BS 6644.
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Pressurised system to comply with BS 7074.
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It is recommended that the system pipework is flushed twice before water treatment.
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In hard water areas (>180mg CaCO
3
/litre) precautions such as water treatment are strongly recommended to
prevent the build up of sludge and scale and also to control the system water pH to between 7.0 & 8.0.
•
Leaks in the system pipework should be fixed to prevent dilution of water treatment.
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Maximum working water pressure is 7 bar.
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For minimum water pressure see Appendix E .
Rp 3/4” Gas Connection