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INSTALLATION
WATER
SYSTEM
The installation must comply with the requirements of the following codes of practice.
BS 5449 Part 1 Forced Circulation Hot Water Systems
BS 7074 Part 1 Code of Practice for Sealed Water Systems.
BS 7593 Treatment of water in domestic hot water central heating systems.
Isolation valves must be fitted.
The water system must be thoroughly flushed out before adding inhibitor to BS 7593: 1992 treatment of water
in central heating boiler.
Fill the system. Vent all air from system. Vent Pump. Clear any air locks and examine the system for water
leaks.
IMPORTANT: ENSURE ALL SERVICE VALVES ARE IN AN OPEN POSITION.
IMPORTANT: THIS BOILER IS TO BE FITTED ON FULLY PUMPED SYSTEMS ONLY.
IMPORTANT: COMBINATION BOILER ONLY – ALL DOMESTIC HOT WATER OUTLETS SHOULD BE RESTRICTED TO
5L/M
SEALED WATER SYSTEM REQUIREMENTS
The installation must comply with the appropriate requirements of the current issue of BS4814, BS5449,
BS6798 and BS7074 Part 1 and 2.
Safety Valve
A 3-bar safety valve is fitted within the unit. The drain must be routed to the outside of the building. The drain
must not discharge above an entrance or a window or any public access area, be clear of any electrical fittings
and positioned so that any discharge can be seen.
