A.O. Smith 28 30 50 60 service manual Gas data, Installation diagram, General, G30-30 mbar butane

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Installation diagram

Table 3.6 Gas data

Gas category dataII2H3+	Unit	BFC 28	BFC 30	BFC 50	BFC 60
Data for natural gas 2H: G20-20 mbar
Orifice diameter	mm	4.90	5.10	7.00	7.10
Nominal load (upper value)	kW	32.1	34.5	52.6	63.2
Nominal capacity	kW	30.3	32.8	48.6	59.6
Supply pressure	mbar	20	20	20	20
Burner pressure	mbar	8.5	8.5	8.5	11.5
Gas consumption(1)	m3/h	3.1	3.3	5.0	6.0
Data for LP gas 3+
General
Orifice diameter	mm	2.50	2.60	3.40	3.80
Restrictor diameter	mm	n.a.	n.a.	n.a.	n.a.
G30-30 mbar (butane)
Nominal load (upper value)	kW	30.7	32.8	50.6	59.4
Supply pressure	mbar	37	37	37	37
Burner pressure(2)	mbar	37	37	37	37
Gas consumption(1)	kg/h	2.2	2.4	3.7	4.3
G31-37 mbar (butane)
Nominal load (upper value)	kW	29.0	30.9	50.3	59.1
Supply pressure	mbar	37	37	37	37
Burner pressure(2)	mbar	37	37	37	37
Gas consumption(1)	kg/h	2.1	2.2	3.6	4.2

(1)Based on 1013.25 mbar and 15oC.

(2)If using a flat sealing plate instead of a burner pressure regulator, it is assumed that the burner pressure is equal to the supply pressure. In practice however, the burner pressure will be lower.

3.5Installation diagram Figure 3.3 shows the water and gas connection diagrams for unvented and vented installations. The following paragraphs, describing the connections in detail, make reference to these diagrams

Release R.1.3 UK 23