Service manual

6. Curtains missing or open—replace curtains. Long curtains are placed on the ends. The conveyor is an

open process because of the two openings; this allows greater disturbance to the energy transfer.

7. Racks washing large trays—trays will divert water out of its tank

8. Washing plastic trays—plastic will act as a heat absorber. Do not wash large plastic trays rack to rack,

alternate with glasses, silverware racks so heat is not totally drained out of the water.

9. Racks over loaded with too many ceramic plates become a heatsink—space out plates properly

10. Not pre-rinsing the ceramic plates and other ware with hot water means they enter the machine at

room temperature or cooler and tamp down the tank temperature—especially true in the fall or winter

months.

11. Finally, individual accounts may have disturbances that are not commonly seen. Everything takes heat

away from water, the only way to replace it is with wattage.

Even if all eleven points in this ADS heating guide are addressed, nothing will change the fact that an idle

water tank heated to a set temperature, when the pump ﬁ rst starts spraying, will not be able to equalize

the layers of water temperature for several minutes. The same is true of an electric grill, which has much

better heat transfer from element to metal than from element to liquid. It still takes time for the entire grill

to equalize in temperature when ﬁ rst turned on, it is not instant.

We don’t trivialize this or dismiss it, but it is a reality we must live with. All manufacturers of commercial

dishmachines (that have a holding tank with a sustainer heater) experience a drop in temperature when

the tank is ﬁ rst stirred. Depending on conditions at the account, once the machine is used in a continuous

manner, the temperatures will equalize around the set-point. If, under normal use, this does not happen

there may be one of the eleven points missing, as noted in our guide. This is unless they are washing

racks of plastic trays back to back, in which case the curtains are pushed open and the plastic draws off

all sustaining temperatures. Nothing can be done to prevent this except to space out the racks of plastic

trays with other racks of dishware.

ADC 66 Conveyor

An 18 kW heater will draw 44.7 amps on each leg on 208v and put 16.1 kW in the water. On 200volts it

will be 42.9 amps and only put 14.8 kW in the water. The wash motor will be drawing about 8 amps each

leg on 208v. Test each leg on the heater and motor and compare to those rates above. If both are lower

amps than 44.7 or 8 respectively, then the tester needs calibration. If the heater is in the 30ish amp range

and your motor is at 8 amps, then that will indicate there is a problem with the 18 kW heater, or it is a 12

kW or 14 kW by mistake. If the machine is reﬁ lling during operations it will be caused by a weakened ﬂ oat

switch (replace), poor racking procedure (training), table problems (sink too close to machine), or spray

arms not in position or jets are bent spraying into other tanks (training).

--Russell Payzant 7/2013