Fulton VMP Hot Water (VMPW) - Manual (Page 37)

Questions? Call (315) 298-5121, or visit us online at www.fulton.com
SECTION 4
VMPW-IOM-2012-1001
MAINTENANCE
4-7
ã
WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional/professional codes and
regulations.
Ð
CAUTION
All maintenance procedures should
be completed by trained personnel.
Appropriate training and instructions
are available from the Fulton Service
Department at (315) 298-5121 or your
local Fulton Thermal Representative.
Ensure that the blower/gas train
assembly is fully supported during
removal/cleaning or burner, as the
transition elbow will be removed.
2. Adhere to the following:
Gas-Fired Unit It is a good policy to have 3.5-4.0% excess oxygen, which will
provide 10.5-9.5% excess carbon dioxide.
Oil-Fired Unit It is a good policy to have 4.0% excess oxygen, which will
provide 11.0% excess carbon dioxide.
Verify that carbon monoxide level is zero. To do this, use a
Bacharach sniff er and CO tubes to prove a clean burn.
Note: Actual values may change when boiler is installed and connected to appropriate stack. Refer to
factory test fi re sheet for original factory settings.
3. To increase the oxygen in the burner, open air adjustment to right. To
reduce the secondary air, move air adjustment to the left.
NOTE: Too much oxygen will blow the pilot out. Too little oxygen will make the
boiler burn dirty.
Procedure for Flame Scanner Adjustment
Flame scanner adjustments are made with the detectors installed and the burner
running. It is essential to obtain optimum fl ame signal detection for safe and
continual operation of the control relay.
Gas Unit
Perform adjustment as follows:
1. Close gas cocks on gas train assembly. This will prevent gas from going into
the burner.
2. Turn boiler on while microampmeter is in place.
3. During the ignition trial period, determine if the microampmeter exceeds
#1. If yes, it is likely picking up ignition interference and realignment is
necessary. It may be necessary to place a reduced scanner orifi ce plug into
the scanner eye area.
4. Repeat steps 1 - 3 until a reading of #1 or less is achieved on the
microampmeter.
5. Reopen gas cocks and adjust the scanner signal response to maximum
possible signal.
Oil Unit
Perform adjustment as follows:
1. Turn power to panel OFF.
2. Disconnect the hot wire to the oil valves. This will prevent the oil valves
from opening.