Bosch Appliances 18/25, 12/18 Filling Primary Sealed Systems, Showers/Bidets, Domestic HOT Water

PRE -	INSTALLATION
INSTALLATION
COMMISSIONING

			Water main
Heating return			supply
	Non return	Non return
Hose	valve	valve
return
Stop			Stop
cock	Test cock		cock
Temporary hose

		Make up
Heating return	Auto air		vessel
	vent
	Non return		1000mm above
	valve
			the highest point
			of the system
	Stop
	cock
	Fill Point

WATER SYSTEMS & PIPEWORK

FILLING PRIMARY SEALED SYSTEMS:

•Filling the system must comply with one of the methods shown opposite.

•The filling point must be at low level and must never be a permanent direct fixing to the mains water supply.

•Filling loops must be WRAS approved.

SHOWERS/BIDETS:

•If a shower head can be immersed in water or comes closer than 25mm from the top edge of a bath or shower tray spill over level then an anti-siphon device must be fitted to the shower hose.

•Only thermostatically controlled showers are suitable for use with this appliance.

•Bidets with direct hot & cold mains water can be used (with the approval of the local water authority) and must be the over rim flushing type with shrouded outlets to prevent the fitting of hand held sprays.

DOMESTIC HOT WATER:

•Plastic pipework must not be used for the DHW system.

•Taps and mixing valves must be capable of sustaining a pressure up to 10 bar in accordance with the Water Regulations as they will be operating at mains water pressure.

•Hot water temperature and flow rate are affected by the size and insulation of pipework making up the distribution system and are controlled by the hot water tap and the water main inlet pressure. A mixing valve can be fitted if a more permanent setting is required.

•If using more than one outlet at once causes water flow starvation, fit flow balancing valves or Ball-O-Fix valves to the appropriate outlets.

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WATER SYSTEMS & PIPEWORK	INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32
	8 716 113 389b (09/07)