FULTON VMP-W 40 -150 HP Installation And Operation Manual page 40

MAINTENANCE
Problem
Burner Cut-O / Ignition
Failure/ Flame Failure
* For natural gas red boilers. Refer to the test re sheet for all other fuels.
4-10
Troubleshooting Gas Fired Boilers
Potential Cause
Power Supply
Gas Supply
Ignition Electrodes
Bad Air Switch
Dirty or defective UV Scanner
Transformer
Flame Safeguard Control
Contact open on air safety
switch
Loose Wire Connection
Scanner wiring reversed at panel
box
Protectorelay
VMPW-IOM-2012-1001
Potential Remedy
Check fuse or circuit; reset or replace, as
necessary.
Check to be sure main gas cock is not
closed. Check coil in gas valve with OHM
meter. Replace if faulty. Check gas regulator
setting and readjust as necessary. Check
inlet gas pressure and increase or decrease
as necessary.
Check for gas pressure and for intermittent
supply problems. Gas pressure for natural
gas should be 4 in to 11 in wc at the head of
the train.*
Check electrodes for carbon buildup and clean if
necessary. Check for proper adjustment. Readjust
if necessary. Check for cracks in porcelain; if found
replace.
Check for bad air switch by jumpering the two air
switch leads at the terminal block. If the boiler
starts and runs with these terminals jumpered,
the air switch should be replaced.
Check for debris on ame scanner and clean or
replace as needed. Ensure scanner is properly
located.
Check voltage between transformer leads at
terminal block to be sure transformer is being
powered.
Check voltage between ignition terminal and
neutral. Check must be made before control locks
out on safety. If no power, replace control.
Adjust to proper setting
Check connections to all components.
Change to correct terminals.
Check voltage between pilot terminal and
ignition terminal. Check must be made before
control locks out on safety. If zero voltage, clean
relay contacts and recheck for power. If no power,
replace control.
SECTION 4
© The Fulton Companies 2012