Water circuit of a combined service wall-mounted gas-fired boiler

(19)

(11)

EP 0 976 989 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	08.11.2000 Bulletin 2000/45

(43)	Date of publication A2:
	02.02.2000 Bulletin 2000/05

(21)	Application number: 98123350.5

(22)	Date of filing: 08.12.1998

(51)	International Patent Classification (IPC)⁷: F24H 9/14

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

29.07.1998 IT MI980531 U

(71)	Applicant: IABER S.p.A.
	23900 Lecco (IT)

(72)	Inventor:
	Tagliaferri, Marco 23900 Lecco (IT)

(74)	Representative: Carloni, Franco
	c/o Calvani, Salvi & Veronelli S.r.l., Piazza Duca d'Aosta, 4 20124 Milano 20124 Milano (IT)

(54)	Water circuit of a combined service wall-mounted gas-fired boiler

(57) The water circuit (10) for a combined service wall-mounted gas-fired boiler includes a primary circuit (11) in which the hot water for room heating is circulated and a secondary circuit (12) in which hot water for domestic use is circulated. In order to fill with water the primary circuit (11) of the boiler and the room heating units connected thereto through pipes (M,R) a three-way valve (32) is provided. This valve (32) is arranged so as to connect the primary circuit (11) or the secondary circuit (12) to the water mains (D) or to disconnect both therefrom. When the filling with water of the primary circuit (11) and the room heating units is required, the three-way valve (32) connects the primary circuit (11) to the water mains (D), while during the normal operation of the boiler the three-way valve (32) connects the secondary circuit (12) to the water mains (D).

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