Bosch Appliances 35CDI II, 28CDI General Notes, Central Heating System, Sealed Heating System

GENERAL NOTES

CENTRAL HEATING SYSTEM

During the first few hours of operation of the central heating system, check that all radiators are being heated at an even rate. Should the upper area of a radiator be at a lower temperature than the base of the radiator, it should be vented by releasing air through the venting screw at the top of each radiator. Make sure your installer shows you how to carry out the operation. Repeated venting will reduce the quantity of water in the system and this must be replen- ished for safe and satisfactory operation of the appliance. Should water leaks be found in the system or excessive venting be required from any radiator, your installer or heating engineer should be con- tacted and the system corrected.

Fig. 1a.	SEALED HEATING SYSTEM
	The appliance can be fitted to a sealed heating sys-
	tem which is pre-pressurised. In this case your installer
	will advise you on the minimum and maximum pres-
	sure that should be indicated on the pressure gauge. See
	Fig. 2. Check regularly that this pressure is maintained
	and contact your installer or maintenance engineer if
	there is a permanent significant drop in pressure indi-
	cated on the gauge. If the system loses pressure it
	should be re-pressurised as instructed by the installer
	(N.B. Maximum operating pressure 2.5 bar).
	Re-pressurising The System (See Fig. 1a).
	(If in doubt leave this procedure to your installer).
	Remove the bottom panel to gain access to the fill-
	ing loop assembly.
	Insert the bayonet end of the filling key into the
	corresponding cut outs in the filling loop housing and
Grey	twist to lock the key in place.
	Turn the grey knob anti-clockwise to allow water
Knob
	ingress and fill until the required pressure is reached.
	Turn the grey knob clockwise to stop filling and
	remove the filling key by lining up the bayonet end of
Filling Key	the key with the cut outs in the filling loop housing and
	withdrawing the key.
	N.B. The key must always be removed from the
	filling loop housing after the system has been filled to
	prevent accidental filling and to comply with Bylaw 14
	of the Water Bylaws Scheme.
	Store the key in a safe place for future use and
	refit the bottom panel.
	OPEN VENTED HEATING SYSTEM
	The appliance may be fitted to an open vented
	heating system your installer will advise you. There is
	no need to observe the pressure gauge.

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