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AALBORG
INDUSTRIES
21-52/60
I
COMMISSIONING OM5560_97#A.2
2.2.2
Check
the
stop sequence
Step
A:
The stop sequence should also be carefully monitored on site. Operate the
burner for a few minutes and stop it from the control system.
Step B: Check that the solenoid valves are activated and that the air dampers are
moved into closed position.
Step
C:
Check that the burner motor stops.
Step D: Check that the furnace
is
free
of
oil spillage.
2.2.3 Setting
and
testing
of
the
minimum
air
pressure
switch
Step A: When the burner
is
in operation, check the minimum air pressure switch by
increasing the switch point for the switch. Unscrew the protective cover
of
the switch and increase the switch point at the setting wheel. The burner
stops, and a shut down is indicated in the control system.
Step B: Decrease the switch point again. Reset the shut down after testing and start
the burner again.
Step
C:
Measure the pressure difference between the suction and pressure side
of
the fan at minimum burner load. Use this value for determination
of
the
switch point.
It
should be approximately 80%
of
this value.
Step D: Adjust the setting wheel
of
the minimum pressure switch to the calculated
value and mount the protective cover.
2.2.4 'Setting
and
testing
of
the
high oil
pressure
switch
Step A: When the burner
is
in operation, check the high oil pressure switch by de-
creasing the switch point for the switch. The burner stops, and a shut down
is
indicated
in
the control system.
Step
B: Decrease the switch point again.
It
should be adjusted to 6 bar. Reset the
shut down after testing.
2.2.5
Check
the
safety interlock
shut
down for flame failure
equipment
Step A: When the burner
is
in operation, check the flame failure equipment by re-
moving one
of
the flame scanners from the holder and cover the sensor. The
burner stops, and a shut down for flame failure
is
indicated
in
the control
system. Reset
all
shut downs.
Step B: Check and simulate a glowing furnace
by
using a flash light pointed directly
at the flame scanner.
Step C: Set the burner into start mode. The control system should indicate a shut
down for flame failure. .
Step D: Mount the flame scanner into the holder and reset
all
shut downs.
Step
E:.
Perform the saine checks with the other flame scanner.
2.2.6
Check
the safety interlock
shut
down for
burner
swing
out
Step A: When the burner
is
in operation, unscrew the screw that holds the burner
flange and carefully swing out the burner a few
mm.
The burner stops, and
a shut down for burner swing out
is
indicated
in
the control system.
Step B: Close the burner and secure with the screw. Reset
all
shut downs.
Language
UK
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