Champion PP-28 Corner, Technical Manual

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BASIC SERVICE
BASIC SERVICE
This next section provides photos, illustrations and basic instructions for the electrical service
and replacement of the main components. It does not cover all components such as the wash arm
supports, hoses or panels. These repairs require simple observation and basic mechanical skill
and therefore are not included in this manual.
WARNING:
Machine surfaces are hot during and after normal operation.
WARNING:
When working on the pot and pan washer, disconnect the electrical service and place a red
tag at the disconnect switch to indicate work is being done on the circuit.
WARNING:
Use extreme caution when testing circuits while power is applied to the machine.
Fill/Rinse Solenoid Valves
There are two different types of valves used on the PP-28; Hot Water and Steam valves, both of
which are rated 120VAC. The steam booster and steam fill valves come with a four screw pattern
on the body. In all cases these valves must be installed with the coil above the valve body. Repair
kits include spring, piston, and diaphragm. The electrical solenoid coil is replaceable as well.
When ordering the replacement components as well as the complete valves, specify the size and
type needed.
Vacuum Breaker
The vacuum breaker is located on the top of the machine providing a anti-siphoning protection.
The diaphragm is replaceable by removing the bell shaped top and unscrewing the body.
Dual Float Switches
The tank has a dual float switch assembly. The float switch is on a 24 VAC circuit. When the tank
is empty and both floats are down, the switch for the float will be in a
NO (Normally Open)
position calling for the tank to fill with no heat. When both floats rise to the top the switch will
be in a
NC (Normally Closed) position. The tank heat will be activated and the fill will stop.
Tank Heat
The tank heat can be electric, steam coils or steam injectors.
Electric: Uses 10KW elements that are coated with a special alloy to protect against detergents
in the tank. The element circuit is protected by a thermostat and a HI-Limit switch in the tank.
Steam Coils: Use a 120 volt power to a steam solenoid in a closed loop coil heat exchanger
using a diaphragm trap. The coil circuit is protected by a thermostat in the tank.
Steam Injectors: Use a 120 volt power to a steam solenoid valve that injects steam through a
two muffler system. A one-way check valve prevents back-siphoning should the valve fail.
This circuit is also controlled by a thermostat located in the tank.
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