Service manual

If there is a fault, repairs consist of #1 replacement of the ADS switch (P/N 291-3014 only, similar looking

switches will not work), #2 replace the “ﬂ oat” or #3 removing anything that interferes with the rod holding the

weight—like buildup inside the protecting tube. With the machine full, test by ﬂ ipping the lever that pushes

against the switch button 5-10 times, should never stick on. If it does, refer to the three repairs above.

There are two switches on the conveyor, either one turns on the single ﬁ ll valve.

“Why won’t the machine ﬁ ll with water when I turn it on?”

If there is no “ﬁ ll” water coming in, it can be a result of an electrical problem from a faulty switch, loose wire,

or a failed coil. Test at the ﬁ ll coil’s two electric wires to see if there is 115v when the machine is turned on

and tanks are empty, if there is voltage, the problem is a bad coil. Or it can be a result of no water supply to

the machine, check to see if the valve has been turn off.

“Why does it take so long to ﬁ ll the machine?”

Reasons for slow ﬁ lling can be clogged or undersized piping (1/2” pipe min, recommend ¾” pipe), restricted

pipes, faulty PRV (pressure regulator valve), water heater type, and the facility’s water pressure problems.

Tankless or on-demand water heaters are not recommended for commercial dishmachines because of

restricted pressure and long ﬁ ll times.

“What should we do if the incoming water is too cold?”

If the water heater is too far away, pipes need to be insulated. If the heater is not sized for the demand, it

needs to be up graded. If it is turned down too far, it needs to be set up (120°F min at the machine).

“How do I adjust the ﬁ ll so all the tanks ﬁ ll up on a 66 or 44?”

There is a diverter plate located inside the wash cabinet, near the center at the top. It is mounted on two

studs and has slotted holes. Loosen the two nuts and it can slide left or right. Place the diverter so it just

interrupts the incoming water stream enough to separate a small jet of water about the size of a pencil. This

jet of water will follow the plate and ﬂ ow into the rinse tank. When the rinse tank is the last tank to ﬁ ll up, that

will mean the overﬂ ow from wash and rinse tanks will ﬁ ll the last tank (power scrapper tank) of the ADC-66

before shutting off the water. This is the same procedure for setting the adjustment on the ADC-44.

FINAL RINSE SOLENOID

“How much pressure should be indicated on the gauge when the ﬁ nal rinse is spraying?”

The requirement is a minimum of 20 psi and a maximum of 25 psi. Pressures that are near 30 psi will

overcome most peristaltic feeders and prohibit chemical dispensing into the ﬁ nal rinse manifold.

“The pressure gauge reads 65 psi, but when it goes into ﬁ nal rinse the pressure will drop to 15 psi, there is

plenty of pressure in the building, why does it drop so much when connected to the ADC-44?

The 65 psi is simply the building’s static pressure. That means, when all openings are closed to the

building’s water pressure—the source (municipal utility), is providing that much pressure to the local water

system. Like a balloon ﬁ lled with air and a knot tied in the end.