A.O. Smith BFM - 100 Installation & Service Manual page 71

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Instruction manual BFM
COMPONENTS:
A Mantle
B Isolating transformer
C DPS (Differential air pressure switch)
D Filter
E Reset button
F Frost thermostat
G Control thermostat
H ON/OFF switch
K Safety thermostat
L High-limit thermostat
M Burner control
N Terminal block
P Earth strip
R Relay
OPTIONAL COMPONENTS
S Clock
T Potentiostat
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