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46
HBG EVAPORATOR OPERATOR’S MANUAL
HBG • 8.913-990.0-K
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
BURNER WON’T SHUT
DOWN AT LOW WATER
Low water fl oat does not work Check switch for continuity, then
adjust or replace.
WATER WON’T HEAT UP
OR HEATS UP TOO SLOWLY
Sludge buildup on fl oor or tank Scrape sludge from bottom of tank.
Incorrect gas supply for burner Recheck manifold. Reset if needed.
AIR PUMP
WON’T START
Long fl oat, top micro switch not
energized. Water too high
Keep evaporating or
manually lower the water level.
Air regulator setting adjusted too low Readjust air regulator to between 50
and 100 psi.
Air pump solenoid plugged Clean out.
No voltage to air pump solenoid coil Check wiring in electrical box.
Replace parts as needed.
Bad air pump solenoid coil Replace solenoid coil.
WASTEWATER
DISCHARGING FROM
AIR PUMP EXHAUST
Check for diaphragm rupture If ruptured, replace.
Check for diaphragm nut Tighten nut.
AIR BUBBLES IN
DISCHARGE HOSE
Check connections of suction plumbing If loose, retighten.
Check band clamps on intake manifold If loose, retighten.
Check o-rings between intake manifold
and fl uid caps
Replace
o-rings if worn.
Check tightness of diaphragm nut Tighten nut.
AIR PUMP BLOWS AIR
OUT MAIN EXHAUST
WHENSTALLED ON
EITHER STROKE
Check U cups on spool in major valve Replace if needed.
Check valve plate and insert for wear Replace if needed.
Check sleeve and o-ring on diaphragm
connecting rod
Replace if needed.
Check o-rings on piston for wear Replace if needed.
LOW DISCHARGE G.P.M.
Check air supply Adjust to between 50 and 100 psi.
Check for plugged discharge hose Unplug discharge hose.
For the pump to prime itself it must be
mounted in a vertical position so that
the balls will check by gravity
Level machine.
“Check for pump cavitation - suc-
tion pipe should be 1/2”” minimum or
larger if high viscosity fl uids are being
pumped. Suction hose must be non-
collapsible type, capable of pulling a
high vacuum”
Replace hoses if undersized.
Check all joints on intake manifolds
and suction connections. These must
be air tight
Tighten all joints and connections.
Check for sticking or improperly seating
check valves
Clean check valves.
If pump cycles at a high rate or runs er-
ratically, check piston o-rings for wear
Replace
o-rings if needed
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