A.O. Smith BFM - 100 Gas data, Description Unit, Natural gas G20 20 mbar, G31 37mbar propane

3

3.4.3

Installation

Gas data

Gas data

is

Description	Unit	BFM	BFM	BFM	BFM	BFM
		30	50	80	100	120
Gas category: 30 through 100 II2H3+, 120: II2H3P
Natural gas G20 - 20 mbar
Orifice diameter	mm	2.60	2.50	2.70	3.20	3.30
Diameter of pilot flame orifice	mm	0.56/0.41	0.56/0.41	0.56/0.41	0.56/0.41	0.56/0.41
(1) = Blank plate	1 or 2	2	2	2	2	2
(2) = Burner pressure regulator
Nominal load (upper value)	kW	32.2	52.2	83.3	113.3	127.7
Nominal output	kW	26.4	42.3	67.5	90.8	102.4
Supply pressure	mbar	20	20	20	20	20
Burner pressure (†)	mbar	12.5	12.9	12.9	12.5	14.0
Gas consumption (*)	m3/h	3.1	5.0	7.9	10.8	12.2
LP gas data
G30 - 30 mbar (butane)
Orifice diameter	mm	1.45	1.40	1.50	1.95	n.a.
Diameter of pilot flame orifice	mm	0.25	0.25	0.25	0.25
(1) = Blank plate	1 or 2	1	1	1	1
(2) = Burner pressure regulator
Nominal load (upper value)	kW	31.4	49.9	81.3	110.5
Nominal output	kW	26.4	41.4	67.5	90.8
Supply pressure	mbar	30	30	30	30
Burner pressure (†)	mbar	-	-	-	-
Gas consumption (*)	kg/h	2.3	3.6	5.9	8.0
G31 - 37mbar (propane)
Orifice diameter	mm	1.45	1.40	1.50	1.95	2.30
Diameter of pilot flame orifice	mm	0.25	0.25	0.25	0.25	0.25
(1) = Blank plate	1 or 2	1	1	1	1	2
(2) = Burner pressure regulator
Nominal load (upper value)	kW	30.4	47.8	77.2	110.9	125.0
Nominal output	kW	25.5	39.6	63.9	90.8	102.4
Supply pressure	mbar	37	37	37	37	37
Burner pressure (†)	-	-	-	-	--	22.0
Gas consumption (*)	kg/h	2.2	3.4	5.5	7.9	8.9

(*) Based on 1013.25 mbar and 15 °C.

(†) If using a blank 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.

22 Instruction manual BFM