Goldmedal 2556 User manual

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Part No. 69922
Revised May 2002
DISCOVERY
Instruction Manual
Model #2556
Cincinnati, OH 45241-4807 USA
www.gmpopcorn.com

DISCOVERY
MODEL 2556
2
Safety Precautions

DISCOVERY
MODEL 2556
3
INSTALLATION INSTRUCTIONS
Inspection of Shipment:
Unpack the shipping container and thoroughly inspect the machine for any damage that may have occurred
during transit. Notify the freight carrier immediately in order to file a damage claim.
Setup:
Your new Discovery Popcorn Machine is completely assembled and tested at the factory.
Remove all packing material and tape before starting operation.
Electrical Requirements:
Domestic models only: 120v/208v or 120v/240v 60 Hz.
A 30 amp – 4 wire wall receptacle is shipped with each machine. This receptacle will accept the attachment
plug on the popper and must be used. Your electrician must furnish sufficient current for proper operation of
your machine. We recommend this popper be on a dedicated and circuit
protected line. (note: The Discovery “uses” both “hot to neutral” legs, 120v. The machine does not “use” the
208v or 240v, “hot to hot” connection.
FINAL PREPARATIONS
The popcorn machine was adjusted, inspected, and tested before it left the factory.
After the machine has been installed, mount the kettle assembly in the hanger arms
and plug in the kettle lead-in cord. Tighten the ring on the kettle lead-in plug.
If supplied with automatic oil delivery system:
Connect the clear oil line from the pump to the aluminum line from the popper with
the supplied hose clamp. Connect the 6 pin connector from the popper to the
receptacle on the oil pump. Both Bucket pump (2114 or 2114EX) and Bag-in-a-Box
pump 2257H or 2257HX) have the same receptacle.
Follow the instructions provided in the oil pump manual to set the oil delivery amount.
The proper amount of oil for the 32oz. Discovery is between 8oz. to 9.6oz.
To check for proper amount of oil, and assure oil is liquid, dispense a “shot” into a
measuring cup.

DISCOVERY
MODEL 2556
4
OPERATING INSTRUCTIONS
CONTROLS AND THEIR FUNCTIONS
LIGHT SWITCH
Operates on all the lights, interior and dome, on your popcorn machine.
WARMER SWITCH
Operates the warmer in the corn storage area, keeps popped corn warm.
KETTLE HEAT SWITCH
Operates the heating elements in the popping kettle.
KETTLE MOTOR AND EXHAUST SWITCH
Operates both the kettle agitator motor and the exhaust blower. The exhaust blower is only required
when popping corn.
OIL SYSTEM MASTER SWITCH (If supplied)
Sends power to the oil pump, either the Bucket Pump or Bag-in-a-Box models. The warmer/blower on
the oil pump is activated. The warmer/blower on the oil pump will keep coconut popping oil liquid if
the doors on the base are kept closed. It may be desirable to keep this switch on at night, if you have
problems keeping the coconut oil liquid. Coconut oil will congeal at temperatures below approximately
76º F [24º C].
“RED” OIL DISPENSE MOMENTARY SWITCH(If supplied)
When pushed, will dispense the predetermined amount of oil into the kettle.
SALT/SWEET SWITCH (If supplied)
Adjust the kettle temperature for salt or sugar based popcorn.
LIGHT & AUDIBLE SIGNAL (LOAD – DUMP)
Alerts the operator to:
1. Load the corn and oil or
2. Dump the popped corn from the kettle or
3. Turn off the kettle heat switch if they are done popping corn

DISCOVERY
MODEL 2556
5
POPPING CORN
1. Turn on all Switches.
2. When popping with coconut oil, be sure the oil is liquid. Dispense oil into a measuring cup first then
use that oil for the first popping cycle.
3. When the kettle is ready (about 5-8 minutes), the Light and Audible Signal turn on. Lift the kettle lid
and pour in 32 oz. of corn (use the supplied corn cup) and 8 teaspoons (21 cc) of Flavacol. Close lid.
4. Press the RED oil pump button (if supplied). The proper amount of oil is pumped into the kettle. The
Light and Signal will turn off.
5. When the popcorn has completed popping, the Light and Signal will turn on. Dump the Popcorn.
6. On the final kettle of corn, turn the “KETTLE HEAT” switch off, just as the lids are forced open by the
popping corn. This saves electricity, and helps eliminate smoke and odor after you have stopped
popping.
REMEMBER:
If the kettle heat switch is turned on and the Signal is sounding one of the following actions should
be taken:
1. Load the corn and oil or
2. Dump the popped corn from the kettle or
3. Turn off the kettle heat switch if you are done popping corn
When you are finished popping, make sure “KETTLE HEAT” and “KETTLE MOTOR” switches are turned
“OFF”.
NEVER LEAVE THE HEAT ON WHEN YOU ARE NOT POPPING.

DISCOVERY
MODEL 2556
6
CLEANING INSTRUCTIONS
DAILY:
Clean the Kettle
1. As you pop corn, wipe the kettle with a clean cloth. It is easy to keep the outside clean when the kettle is
warm and the oil is not baked on.
CAUTION: The hot kettle will cause burns if you touch it with your hand.
2. Every night, mix a gallon of Heat’n Kleen solution (2 tablespoons per gallon of water). Turn on the kettle
heat. When the water starts to boil, turn off the heat and let it work overnight.
3. The next morning, dump the solution in a bucket and wipe the inside of the kettle with a cloth.
4. A CLEAN-IN-PLACE hook is located behind the operator side kettle support arm. Just tilt the kettle to
the dump position, and swing the hook into position to hold the kettle in the dumped position. This
feature will help you clean the kettle.
Clean the Popcorn Machine
1. Wipe the stainless steel parts with a clean cloth and cleaner designed for stainless steel. Do not use
oven cleaners, as they will damage parts of the machine.
2. Ammonia cleaners will damage the plastic doors. Use only non-ammonia cleaners.
WEEKLY:
Clean the filters in the popcorn machine
1. Loosen the screw on the filter cover plate on the ceiling inside the popper. Remove the cover and mesh
filters. Clean the mesh filters in warm soapy water. Let dry overnight and reinstall.
CAUTION: Keeping the filters clean is important to let the exhaust system “do its job”.
2. Check the condition of the clear oil lines and tighten or replace as required.
Item No. Part No. Description
1 41250 Metal mesh filter

DISCOVERY
MODEL 2556
7
MAINTENANCE INSTRUCTIONS

DISCOVERY
MODEL 2556
8
TROUBLESHOOTING
LONG POPPING CYCLES
If your pop cycle is longer than 4 minutes, it can be the result of several things:
A. HEATING ELEMENT - One of the heating elements in the kettle may be burned out. This would
result in the kettle never reaching the proper operating temperature.
B. LOW VOLTAGE - If the machine is operated on low voltage, this could cause the kettle not to reach
the proper operating temperature. Voltage for each leg, with kettle turned on, must be at least 110v.
C. INADEQUATE SUPPLY LINES - Inadequately sized electrical supply lines, in addition to being a fire
hazard, would also prevent the kettle from reaching the proper operating temperature. Check with a
qualified electrician.
D. INFERIOR CORN - Inferior quality corn would result in longer popping cycles. Use only top quality
hybrid popcorn from reputable suppliers. Even then, if you let your corn pick up moisture or dry out,
your popping cycles will be slow.
KETTLE DOES NOT HEAT
Before you go any further, make sure the kettle lead-in cord is plugged in and the circuit breakers are
not tripped. Make sure all electrical connections are tight.
A. KETTLE HEAT SWITCH - Check the voltage to and from the “KETTLE HEAT” switch, and if the
switch is defective replace it.
B. CONTROL - A defective thermocouple lead will cause the kettle not to heat. Check for good
connections from the kettle to the control.
C. MAIN RELAY
MOTOR WILL NOT TURN AGITATOR
WARNING! If the kettle agitator shaft is not rotating, Do Not Pop corn.
Adjust the clearance between the kettle bottom and the stir blade to 1/32” (use a dime). Loosen the set
screw in the collars above and below the crossbar and adjust the agitator shaft as necessary. Then re-
tighten the set screws in the collars.
OIL PUMP DOES NOT DELIVER OIL TO KETTLE
If the pump is operating but oil is not dispensed, the oil may be solid in the oil lines. If the pump is not
operating see the pump manual for instructions.

DISCOVERY
MODEL 2556
9
TROUBLESHOOTING
REPLACING BROKEN GLASS
Should you accidentally break a panel of glass, it can be replaced very easily without disassembling the
popper.
1. Remove all loose pieces of glass.
2. Unscrew the glass retaining strips.
3. Remove all rigid glass channels from around the glass to be replaced. Set it aside as it must be
reused.
4. Carefully remove the rest of broken glass.
5. Apply decals to the new glass panel.
6. Slide rigid glass channels over the exposed sides and bottom. Maneuver the new glass into
position.
7. Replace glass retaining strips using the same screws you removed earlier.
Glass Size: (Front) 31 1/16” X 32 3 /16 " X 1 /8 "
(Sides) 23 15 /16" x 33 3 /16" x 1 /8"