Gas Burners - CleaverBrooks FLX Operation, Service And Parts Manual

Profire V Burner
OIL FIRED
Disconnect the electrical power to the burner. Disconnect the
electric oil safety shutoff valve. Reconnect electric power.
Close the pilot line manual gas valve, if used.
Start burner and at the time of pilot trial, with just the
electrical ignition system energized. The flame relay should
not pull in.
Upon completion of successful test, disconnect power supply.
Reconnect oil safety shutoff valve and turn on manual pilot
gas valve. Reconnect power supply and proceed with startup
procedures.
STARTUP AND OPERATING -

GAS BURNERS:

Performing A Gas Valve Leak Test (Bubble Test)
A gas valve leak test must also be performed on the automatic
safety shutoff valves located in the main gas train prior to any
initial commissioning or subsequent maintenance of the
burner and gas train systems, where automatic valve proving
systems interlocked with the main burner safety control are
not provided. This test should be performed periodically to
ensure no leakage of valves in their closed or de-energized
position.
Refer to the diagram below when following this procedure.
The unit should be taken out of service if the unit fails any of
the following tests. Any defective part must be replaced prior
to putting the equipment back into service.
750-177
WARNING
! DANGER
! DANGER
FAILURE TO FOLLOW THIS PROCEDURE MAY
RESULT IN EXPLOSION, FIRE, PROPERTY DAM-
AGE, AND PERSONAL INJURY. THIS PROCE-
DURE MUST BE PERFORMED ONLY BY
AUTHORIZED AND QUALIFIED PERSONNEL.
1. Close (or shut off) manual valve [7] downstream of the
automatic safety shutoff valves, trapping gas pressure
between the safety shutoff valves and manual valve and
causing a flame failure. This should close the auxiliary
safety shutoff valve [4] and main gas safety shutoff
valve [5]. If both or either valve fails to close, do not
proceed further until the problem is corrected.
2. Release gas pressure at the leak test cock [8B] between
manual valve [7] and main gas safety shutoff valve [5],
then conduct a bubble test for leak through blocking
valve [5]. If no leak, close the test cock.
3. Release gas pressure at test cock [8A] and bubble test
for leak through auxiliary safety shutoff valve [4]. If no
leak is observed, close test cock and go to next step. If
either valve leaks, correct the problem and retest 10
times before proceeding.
4. When there are no valve leaks, open manual valve [7]
and relight the burner. Then close manual valve [1]. The
safety shutoff and blocking valve should close due to
low gas pressure.
5. Relight the burners. Reduce the high gas pressure switch
[6] setpoint setting until it reaches the operating gas
pressure, which should cause the auxiliary and main gas
safety shutoff valves to close from high gas pressure.
CAUTION
Chapter 2
2-19