A.O. Smith BFM 80 - Manual (Page 28)

28
Ensure connections correct,
if yes replace
MAXIMUM THERMOSTAT
Check
voltage present at
GATE 12 MAXIMUM
THERMOSTAT?
Check
voltage present at
GATE 1 BURNER
AUTOMATION
S4560D 1150?
Check
voltage present at
GATE 8 BURNER
AUTOMATION
Is VENTILATING FAN
in operation?
Check
voltage present at
GATE 7, BURNER
AUTOMATION
Check
voltage present at
GATE 3 AIR PROVING
SWITCH
Check
voltage present at
GATE 1 AIR PROVING
SWITCH
Check
voltage present at
GATE 7, BURNER
AUTOMATION
Ensure connections correct,
if yes replace
BURNER AUTOMATION
Replace
BURNER AUTOMATION
Ensure connections correct,
if yes replace
VENTILATING FAN
Ensure connections correct
Disconnect the pipe air
supply by removing the
elbow at the rear bottom.
Measure pressure at
hose H
at the column. Replace
BURNER AUTOMATION
DISCONNECT
GAS SUPPLY
Ensure connections
correct,
if yes replace
BURNER
AUTOMATION
yes
yes
yes
yes
yes
yes
yes
yes
yes yes
no
no
no
no
no no no
no