Service manual

“The conveyor can’t seem to keep up the tank temperatures, can it be fi xed?”
EVERYTHING TAKES HEAT AWAY. The only thing that will sustain the water temperature in a tank of water
being sprayed into the air is the kW in the element itself. All of the following cause cooling of the tank
temperatures.
If the voltage is low (200v) kW is less and water takes longer to heat, use heater rated 200/208v
If the curtains are missing, cooling takes place
If plastic trays are being washed rack after rack, they hold the curtains open
If cooling fans are running in the room, they will cool the sprays
If venting fans are over 800-1200 CFM, they will cool the sprays
If water is draining down the table, the tank heater will be turned off during fi ll
If there is calcium build up on the heater element, heat will be lost
If the heater is faulty, a loss of kW results. A heater has a fi nite life like a light bulb
If the thermostat set point is adjusted low, it will not catch up
If the tank thermometer is not calibrated accurately, the thermostat set point could be in error
If fi nal rinse temperatures are low, they will cool the whole machine.
You will need an accurate amp gauge and digital thermometer to troubleshoot heating problems.
SPRAY ARMS
“Why is water spraying out of the top of the doors or out of the sides onto the tables?”
A missing or bent spray arm end cap allows water to rush out of the spray arm, causing splashing out of
openings on the machine.
“Why does the end cap fi t so loose, it falls open?”
For the captive endcaps, this happens when the cap latch has been forced shut over seeds or toothpicks,
over time it loosens up. Look at the cap end-wise (the coin edge). It should be straight. Bend with an
adjustable wrench the small tab so it is straight with the coin edge, and the latch will snap tight again.
FILL SOLENOID
“Will the machine fi ll and shut off automatically when I turn the machine on?”
The answer is YES; it will fi ll automatically when it is turned on. Any time the tank water level drops below
the bottom of the tank “fl oat” the machine will turn off the tank heaters and turn on the fi ll valve. When the
top of the fl oat is covered, the switch will turn off the water and turn the heaters back on.
“The machine is fi lling all the time, what is the cause?”
The “fl oat” in the ADC conveyor and HT machines actually will not fl oat. They are heavier than water and
will sink. They work according to specifi c gravity, when submerged in water; they become light enough for
the return spring in the fl oat switch to lift the weight. There is no maintenance or adjustment to the system.
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