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COMMISSIONING OM5560_97#A.2
2.2.7 Check the safety interlock
shut
down for high oil
pressure
Step A: When the burner
is
in operation, check the high oil pressure shut down and
trip functiori
as
described in the paragraph "Commissioning
of
the oil sys-
tem". The burner stops, and a shut down for high oil pressure is indicated in
the control system. Reset the shut downs after testing.
2.2.8 Check the
trip
function for
burner
motor
overload
Step A: When the burner
is
in operation, check the trip function for burner motor
overlmid
by
pressing the test button for the burner motor on the circuit
breaker.
Step B: The burner motor stops and a shut down for burner motor failure
is
indicated
in the control system.
Step C: Reset the circuit breakers and all shut downs after testing.
2.2.9
Check
the
safety interlock
shutdown
for too low
water
level
Step A: When the burner
is
in operation, perform a live test
of
both
of
the water level
safety devises. One
of
the alarms must be deactivated while testing the other
and opposite.
Step B: Decrease the water level in the boiler by means
of
the blow-down valves
until the water level has fallen below the too low level mark. After the re-
sponse delay has expired the burner stops and a shut down
is
indicated in
the control system.
Step C: Increase the water level in the boiler and reset the shut down. Perform the'
same test for the other safety device.
Step D: Increase the water level in the boiler and reset all alarms and shut downs.
Activate
all
safety devices again.
2.2.10 Check
the
safety interlock
shut
down for high steam
pressure
Step A: When the burner
is
in operation, raise the boiler pressure until the set point
for high alarm
is
reached. The control system must indicate a high alarm.
Step B: With the burner
in
operation, check the shut down and trip function for high
steam pressure. Raise the steam pressure until the burner stops. A shut down
is
indicated in the control system.
Step C:
If
the boiler safety system
is
equipped with more than one high steam pres-
sure shut down
it
is
necessary to perform the same check with both high
steam pressure shut downs. One
of
the shut downs must be deactivated while
testing the other and opposite.
Step D: With all steam pressure safety interlocks activated, reset all alarms and shut
downs.
2.2.11 Check
the
active safety interlock
shut
downs in emergency operation
Step A: Operate the burner as described
in
the chapter "Manual operation".
Step B: When the burner
is
in
operation, check the active safety interlock shut downs
such
as
e.g. flame failure, too low water level, etc.
as
described previously.
2.3
Commissioning
on
heavy
fuel
oil
When the burner has been commissioned on diesel
oil
the final commissioning
on
heavy fuel oil can
be
carried out.
21-53/60
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