Burner Settings - CleaverBrooks FLX Operation, Service And Parts Manual

Profire V Burner
are capable of operating at low excess air and less than 50
ppm CO levels at all firing rates.
FUEL OIL ADJUSTMENTS
Adjust for a "clean fire." Typically for No. 2 oil, O
6% at low-fire and 3.5% to 4.5% at high-fire.
The burner should be setup and maintained to yield smoke
spot levels less than a #1 spot (ASTM D2156 Shell-
Bacharach Scale) to minimize soot build up in the boiler.
GAS PILOT FLAME ADJUSTMENT
Burner models VG-VLG and VL-60 to 168 are equipped with
a gas pilot system. The gas pilot flame is regulated by
adjusting the pressure setting of the pilot regulator. Normal
setting is 4" to 6" W.C. when the pilot is burning. The flame
must be sufficient to be proven by the flame detector and
ignite the main flame. Although it is possible to visibly adjust
the size of the pilot flame, obtain a proper DC volt or
microamp reading of the flame signal.
The flame safeguard amplifier has a meter jack for this
purpose. At initial startup and during planned maintenance,
test the pilot flame signal, pilot turndown, and safety switch
lockout. Refer to the flame safeguard instruction manual.
WARNING
! DANGER
! DANGER
AN ULTRA-VIOLET FLAME SENSOR ELECRICAL
SPARK INTERFERENCE TEST MUST BE PER-
FORMED AFTER FINAL ADJUSTMENT. SEE SEC-
TION 3 OF THIS MANUAL FOR ADDITIONAL
INFORMATION.
Check the pilot electrode setting. The pilot is accessible by
loosening the four screws on the side of the blast tube and
disconnecting the gas line.
DIRECT SPARK OIL PILOT ADJUSTMENT
Burner models VL13 to 55 are equipped with a direct spark
ignition. Remove the oil drawer assembly and check
electrode settings and nozzle size.

BURNER SETTINGS

To ensure reliable and safe burner performance, the location
and gap setting of the electrodes, and the relative positions of
the burner nozzle, diffuser, and air baffle components must be
set correctly. These items are preset at the factory, but must be
checked prior to placing the burner into initial service, or after
conducting any service work that may have altered their
position.
The nozzle/diffuser assembly must be removed from inside
the burner to enable measurement and readjustment:
750-177
is 5% to
2
CAUTION
1. Lockout and tag the electrical power supply to the
burner to prevent inadvertent operation during checkout
or maintenance activities.
2. Disconnect the high voltage power supply from the oil-
spark-ignition electrodes (if installed).
3. Disconnect the oil piping from the side of the blast tube.
4. Remove the fasteners that secure the drawer to the side
of the burner housing, and remove the complete assem-
bly.
For burners with a gas pilot:
1. Disconnect the pilot line and loosen the locking screws
on the pilot access cover located on the side of the blast
tube.
2. Disconnect the high voltage ignition cable by pulling it
straight back, away from the pilot assembly. The pilot
assembly will slide back away from the diffuser.
3. Turn the assembly and retract it through the access hole.
4. Check the electrode position.
5. Re-assemble in reverse order.
Figure 2-17: Electrode Position
Measure the position of the tip of the nozzle to the diffuser
and compare to the following drawer assembly drawings. To
adjust:
1. Loosen the locking screws on the diffuser clamp.
2. Slide the diffuser clamp along the length of the burner
pipe until the correct dimension is achieved.
3. Tighten the diffuser clamp securely to the burner pipe.
Apply a lock-tight type compound to the screws before
tightening.
4. Carefully install the drawer assembly into the burner.
Chapter 2
2-23