A.O. Smith BFM 80 - Manual (Page 10)

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Description Unit BFM 30 BFM 50 BFM 80
DATA NATURAL GAS G 20
Nominal gas inlet pressure mbar 20 20 20
Burner pressure mbar 12.5 12.5 12.5
Input kW 29 47 75
Output to water kW 27 42 68
Gas consumption* m3/h 3.0 4.7 7.9
Diameter main injector m m 2.60 2.50 2.70
Diameter injector ignition burner m m 0.56 / 0.41 0.56 / 0.41 0.56 / 0.41
Heating time
∆
T=45°C min 35 25 12
DATA PROPANE/BUTANE G 30 - G 31 G30 G31 G30 G31 G30 G31
Nominal gas inlet pressure mbar 30 37 30 37 30 37
Input kW 29 28 46 44 75 71
Gas consumption kg/h 2.3 2.1 3.6 3.3 5.8 5.3
Diameter main injector m m 1.45 1.40 1.50
Diameter injector ignition burner m m 0.25 0.25 0.25
GENERAL
Storage capacity litre 309 298 253
Number of bar burners - 3 5 7
Number of anodes - 2 2 4
Number of flue tubes - 5 7 16
Water connections - Rp11/2 Rp11/2 Rp11/2
Gas connection - Rp3/4 Rp3/4 Rp3/4
Drain connection - 3/4" - 14 NPT 3/4" - 14 NPT 3/4" - 14 NPT
Anode - 3/4" - 14 NPT 3/4" - 14 NPT 3/4" - 14 NPT
Connection T&P-plug** - 1” - 14 NPT 1” - 14 NPT 1” - 14 NPT
Maximum working heat bar 8 8 8
Empty weight kg 270 290 350
1.3.2 Technical data
Heater category:II
2H3+
* Gas usage at 1013,25 mbar and 15 °C.
** For a leak-tight connection European coupling pieces with pipe screw-thread according to ISO 228/1 or ISO 7/1 can be
used on the NPT-connection nipples.