FULTON VMP Series - Page 70

VMP-IOMM-2018-2
Fulton Ltd
Page 62
TROUBLESHOOTING - 6
Problem Cause Remedy
8. Boiler will not
maintain pressure
1. Gas Supply Check gas pressure coming into the gas train, if low
contact the gas supplier.
Check the setting on the gas valve regulator, adjust as
required.Ifpossiblemetertheowrate.
2. Dirtyue CheckueforCarbonbuild-uporblockage.Cleanue
passages with brush.
3. Pressure Control Disconnect all power to the controller. Disconnect the
wires from the controller. Connect an ohmmeter between
the switch terminals. Lower the set point of the controller,
the switch should make raise the set point and re-check,
switch should break. If the controller operates improperly,
replace it.
4. Scale build-up in boiler Clean the pressure vessel.
5. Refractory Bricks. Check the bricks are not plugged with soot or broken into
pieces. Clean and replace as required.
6. Steam traps blowing through. Check steam traps, clean or replace as required.
7. Boiler size. Boiler may be under sized for the application. Consult
Fulton.
8. Faulty Gas Valve. Checkgasowrate.
9. Boiler is Surging
(Widelyuctuating
water level in sight
glass)
1. Steam traps blowing through. Check steam traps, clean or replace as required.
2. Contamination in boiler. Empty boiler and feed tank.
Flushoutandrell,ifsystemoperatesbutprogressively
deteriorates, there is probably a leak somewhere in the
system.
3. Scale buildup or lime deposits. Consult Fulton or call a water treatment specialist.
4. Too much compound (water
treatment over dose).
Dumpcontentsofthereturntankandushthesystem.
Test the water.
5. High Alkalinity (high pH). Have a water treatment specialist test the water.
6. Load exceeds boiler capacity. Check total system load against the output of the boiler.
Decrease the load required at any one time.
10. Boiler rumbles and
pulsates
1. Poor Combustion Check combustion readings.
2. Draft Check draft with a gauge. Draft should be -.05 to -.10 mbar
with the burner off, or -.10 to -.15 mbar when operating.
A barometric damper may need to be installed.
3. Too much main air. Adjust main air gate.
11. Boiler carrying over
water with the steam
1. Steam Traps. Check steam traps, clean or replace as required.
2. Too much compound (water
treatment over dose) in the
system.
Dumpcontentsofthereturntankandushthesystem.
Test the water.
3. Contamination in boiler. Emptyboilerandfeedtank.Flushoutandrell,ifsystem
operates but progressively deteriorates, there is probably a
leak somewhere in the system.
12. Low fuel pressure. 1. Gas pressure regulator Check and replace.
6.1 TROUBLESHOOTING GAS BOILER