Jackson 24A-AF, Instruction Manual

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RINSE TANK HEATER SYSTEM
Function:
The Rinse Tank Heater System is electrically connected in the circuit with the control system functioning
on 110/130V and the power system functioning on 208/230V for both systems. The heat circuit is
controlled by the 'on/fill' switch (mounted on front panel) and a thermostat (mounted near thermometer)
which activates the coil on the heat relay. When higher temperature is required, power is applied to the
heaters when the contacts of the heat relay are closed. Should the rinse tank thermometer read either
too high or too low, follow checkout below.
Checkout of Heater System for Rinse Tank: (Refer to drawing, Figure #2)
Note: The following checkout should be done by a qualified service person or electrician.
1. Turn off power to machine by tripping circuit breaker to 'off position.
2. Remove front kick plate below door.
3. Make sure rinse temperature is below 180°.
4. Reapply power and observe heat relay (2-pole) letter G, figure 2, as 'on/fill' switch is turned on and
off several times.
AA If heat relay contacts do not close, with 'on/fill' switch on:
1. Check power supply at Position 1 on terminal board X. Voltage should be 110VAC.
2. Check Position 3; there should be 'zero' volts there. If not, readjust thermostat per thermostat
instructions.
3. If voltage is being applied to Position 1, then the relay should be replaced; coil on relay probably
defective.
BB To determine if elements are working:
1. There's an insulated movable bar on the heat relay across the top of the two
contacts. With an insulated probe, depress the bar and observe rinse thermometer;
the temperature should rise noticeably in a minute or two. If it moves very slowly, it
would indicate that one element is defective. If it moves consistently higher at a
good rate, the elements are okay.
Note: A check with an amp probe, if available, can be made.
The element should draw 22-25 amps. Replace element if found defective.
CC If the heat relay closes:
1. Check power supply at Position 4 on terminal board X, right hand view. It should be 220V
approx. If not, check circuit breaker at customer's panel; replace if defective.
2. Check power at Position 5; voltage should be 220V. If not, check connections and wires for
breaks; replace as necessary.
3. With 'on/fill' switch on and relay closed, check power at Position 6; voltage should be 220V. If
not, replace heat relay.
4. If No. 3 above checks out okay, check at Position 7; voltage should be 220V. If not, check wiring
from heat relay to elements for loose connections or broken wires;
repair as necessary.