Fulton Companies Gas Fired Steam Boiler VMP-50

WARNING! Make sure main power switch is off before starting work

1. Cleaning the water gauge glass

CAUTION! Do not clean the gauge or gauge glass while pressurized or in operation

a. Clean the water gauge glass using a commercial non-abrasive glass cleaner. Use diluted acids such as hydrochloric (muriatic) acid when regular cleaners do not seem to work. Do not use wire brushes or any other abrasive materials which could scratch the glass. If any leakage is evident, replace the gaskets

b. Always replace the high impact plastic gauge glass protector which is standard on all Fulton Boilers

3. Check scanner or flame rod and ignition electrodes

4. Check starter contacts. Burned or pitted contacts should be replaced. Do not use sand paper or file to clean

5. Clean water traps and strainers in fuel lines

NOTE: If it is determined that a servo motor needs to be replaced, the first step in this process is to verify the model number of the new servo motor is the same as the old servo motor

NOTE: The model number starts with the letters SQM and is displayed on a label on the side of the motor. Once the new motor has been verified to be correct, turn power to the boiler off

Turn off all electricity to the boiler

Remove the cover on the servo motor to be changed

Remove the green wiring plugs and the conduit termination point from the motor by pulling them towards you. A black grounding wire runs from the motor to the conduit termination point. Pull it off from the conduit termination point

Also note the location of the jumper on the left side of the motor

Loosen the allen screws on the motor end of the motor to valve coupling

Unbolt the motor from the mounting bracket and remove the motor

Turn the valve so it is in the closed position and can rotate clockwise to open

Ceramic fiber burner tile removed

Need to replace burner tile bottom holding clips?

Scroll assembly replaced without damaging the ceramic fiber burner tile

1. Cleaning the gas burner assembly

a. Disconnect the gas head from the burner by disconnecting the union. Remove the burner plate screws. Withdraw the burner assembly and clean the flame rod and ignition electrode

b. Check that the settings of the flame rod, if applicable, and ignition electrode correspond to those in the illustration below

c. Reassemble the burner assembly and check the flame rod setting or scanner setting

d. Check the combustion efficiency of the burner and adjust if necessary

e. Clean probe on top of boiler shell and probes in water column. There must be no pressure on the boiler during the removal of the probes

f. Check refractories for soot or breakage and inspect the stainless steel ring (50-100 HP only)

g. With the boiler under no more than 15 PSI pressure, check that the steam safety valve is operating by lifting the lever

2. Drain condensate tank and clean tank by flushing with hose. Check float valve operation

Boiler is cool with little or no pressure showing on the steam pressure gauge

Boiler blow-down valves are open

Note the level in the water gauge glass

Burner shuts off when water drops below the required level

Manual reset of the low water relay is required