VMP IOM
45
PROBLEM CAUSE REMEDY
Boiler will not 1. Gas Supply Check gas pressure coming into gas train. If low, contact gas company.
maintain pressure 2. Dirty Flue Check flue for carbon buildup or blockage. Clean flue passages with brush.
3. Pressuretrol Disconnect all power to the controller. Disconnect the wires from the
controller. Put an OHM meter between the switch terminals. Lower the
set point and recheck with OHM meter. Switch should break. If the
controller operates improperly, replace it.
4. Scale Built up in boiler Refer to Section 2 “Pressure Vessel Cleaning”.
5. Refractories Check refractories to see if they are cracked or broken in pieces.
Replace as necessary.
6. Steam traps blowing through Check traps to see if they are clean or replace as necessary.
7. Boiler size Boiler may be undersized.
Boiler is Surging 1. Steam traps blowing through Check traps to see if they are clean or replace as necessary.
2. High organic in boiler Drain and clean boiler with washing soda per instruction manual.
(i.e. Perc or oil)
3. High boiler TDS Drain boiler and flush system. Refill and increase blow-down
rate/frequency.
4. Too much water akalinity Have water tested by water treatment company, lower boiler alkalinity
(high PH) to recommended level.
5. High sudden steam load Check total equipment horsepower required against horsepower of
boiler being used. Decrease amount of equipment being used at one
time, or reduce the steam flow by partially closing the steam stop valve.
6. High level of water Consult water treatment expert and adjust levels to boiler
treatment chemicals recommended levels.
Boiler Rumbles and 1. Draft problem Check draft with a gauge. Draft should be a -.02” to -.04” W.C. with
Pulsates burner off or -.04” to -.06” when operating. May need to install a
barometric damper.
Boiler pushing water 1. Steam Traps Check traps. Clean or replace as necessary.
with the steam 2. High boiler TDS Drain boiler and flush system. Refill and increase blow-down
(carryover) rate/frequency.
3. High level of water Consult water treatment expert and adjust to boiler
treatment chemicals recommended levels.
Pump will not cut off 1. Dirty Probes Clean or replace as necessary.
2. Relay failed Make sure relay is plugged in tightly. If so, replace water level relay.
3. Ground Connection Check for tightness and clean.
4. Probes not sensitive enough Replace probes and relays with extra sensitive ones.
(RO/DI Water)
Pump runs but does 1. Vapor locking of pump Allow system to cool down, check steam traps and check temp. If it is
not put water into boiler to be sure return lines are not insulated.
Check return tank above 180°F (82°C) vapor locking of pump may occur.
Inspect check valves. Clean and replace as needed.
Replace pump with multistage centrifugal good for 250°F (121°C).
2. Impeller Adjustment Check for impeller wear and adjust per component information in
instruction manual (Burks only).
3. Pump suction plugged Remove/clean inlet strainer.
4. Plugged feed water nipple Check and clean or replace as necessary.
5. Pump undersized/worn Replace with appropriate pump.
Water pump will not 1. Scale on probes Check and clean or replace as necessary.
come on at times 2. Bad Pump Contactor Check to see if contactor is being powered.
Check to see if contactor coil is pulling in. Replace if necessary.
3. Bad Pump Motor Check the incoming power to the pump to be sure it is receiving power.
If power is present but motor does not run, replace it.
Low Fuel pressure 1. Gas pressure regulator Check and replace.
Boiler Flooding 1. Pump does not shut off Dirty probes. Clean or replace as necessary.
2. Relay failed Make sure relay is plugged in tightly. If so, replace water level relay.
3. Ground Connection Check for tightness and clean.
4. Vacuum created with boiler off As the boiler cools off, it pulls water from the system piping. To prevent
this, add a
1
/4” check valve on the steam gauge assembly piping,
which closes under pressure and opens under vacuum.
Maintenance
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