Grindmaster LCD2-1, LCD2-3 Installation Manual

0304 Form # AM-322-03
Part # 62280

American Metal Ware®Liquid Coffee Dispenser

Operation and Instruction Manual

for

LCD2-1

& LCD2-3

© Grindmaster Corporation, 1998
Printed in USA

TABLE OF CONTENTS

Prior authorization must be obtained
from Grindmaster Corporation for all
warranty claims.

Warning Labels . . . . . . . . . . . . . . . . . . . . . .2

Installation . . . . . . . . . . . . . . . . . . . . . . . .3-4

How to Dispense a Cup of Coffee . . . . . . . . 4- 5

Adjustments . . . . . . . . . . . . . . . . . . . . . .5-6

Drink Strength Adjustment . . . . . . . . . . . .5-6

Service and Cleaning . . . . . . . . . . . . . . 6-9

Troubleshooting Guide . . . . . . . . . . . .10-11

Exploded Views . . . . . . . . . . . . . . . . . .12-17

Wiring Diagrams . . . . . . . . . . . . . . . . .18-23

Grindmaster Corporation

4003 Collins Lane
Louisville, Kentucky 40245
[phone] 800-695-4500
[phone] (technical service only)
FAX [phone]
www.grindmaster.com

Models LCD2-1 & LCD2-3

American Metal Ware Liquid Coffee Dispenser Page 2

Warning Labels

The following warning labels were on your dispenser when it was shipped from the factory. They
should remain on your dispenser in good, readable condition at all times. If one of your labels is
missing or damaged, order a replacement label immediately.

!

Part #62243, Located on merchandising door valance on front of dispenser

Part #61321, Located behind the drip pan on the front of the dispenser

!

WARNING: Risk of electric shock. Disconnect from power before servicing.

Hot parts and surfaces inside and outside machine may cause burns. Tank drain
hose inside machine dispenses very hot water. Will cause burns and/or personal
injury. Must have five gallon heat resistant container to catch hot water. Hot water
may splash. Do not attempt to stop hot water once it begins flowing. Replace plug
and clamp prior to refilling tank.

Part #61319, Located on the outside on the back of the dispenser

Part #61326, Located on the outside on the left of the dispenser

Part #61325, Located on the drain hose inside the dispenser

ADVERTENCIA

AUGU MUY CALIENTE PUEDE CAUSAR QUEMADURAS

IMPORTANTE
UD DEBE TENER UN RECIPIENTE RESISTENTE AL CALOR DE CINCO (5)
GALONES PARAQUARDAR AGUACALIENTE. PARAVACIAR ELAGUA CATIENTE
DEL DEPOSITO, QUITE LA ABRAZADERA, APRETE EL TUBBO Y DESCONECTE
LA MANGUERA. NO TRATE DE DETENER EL AGUA UNA VEZ QUE EMPIECE A
FLUIR. REEMPLACE ELTAPONYY SUGETE ELTURBO ANTES DE RELLENAR EL
DEPOSITO.

AVERTISSEMENT

L'EAU TRES CHAUDE PEUT PROVOQUER DES BRULURES

IMPORTANT
IL FAUT UN RECIPIENT RESISTANT A LA CHALEUR D'UNE CAPACITE DE 5
GALLONS (19 LITRES) POUR RECUEILLIR L'EAU CHAUDE DU RESERVOIR.
POUR VIDER LE RESERVOIR, SENLEVER LE SERRE-JOINT, PINCER LE TUBE ET
RETIRER LE TUYAU. NE PAS ARRETER L'ECOULEMENT D'LEAU. AVANT DE
REMPLIR A NOUVEAU LE RESERFVOIR. REPLACE LA FICHE ET LE SERRE
JOINT.

WARNING

Very hot water may cause burns

IMPORTANT

- You must have a 5 gallon heat resistant container to
catch hot water.

- To empty hot water from tank remove clamp, pinch

the tube and unplug hose. Do not attempt to stop
water once it begins flowing.

- Replace plug and clamp prior to refilling tank.

Installation

Water Inlet Connection:

The National Sanitation Foundation requires the following for an NSF approved water hook-up:

1. A quick disconnect water connection or enough coiled tubing so that the machine can be moved for cleaning
underneath.

2. An approved backflow prevention device, such as a double check valve to be installed between the machine and
water supply. A1/4" male flare adapter is provided (packed inside drain tray) to be attached by installer to the
back of the machine for hook-up to water supply. On units plumbed to permanent water line, installation of a water
filter/softener system is recommended to prevent lime and scale build up in the machine. On units pumping from
remote water container, filtered water is recommended to prevent lime and scale buildup in the machine.

3. Water pipe connections and fixtures directly connected to potable water supply shall be sized, installed and

maintained in accordance with Federal, State, and Local codes.

Water hook-up:

1. Install the (2) front 4" legs to provide approximately 1/2" clearance with the bottom of the machine.

2. Install drain tray bracket to the front of the machine by sliding the bracket between the front 4" legs and the
bottom of the machine. The bracket should self locate with screw heads on the bottom of the machine. Tighten
the front 4" legs to secure the drain tray bracket.

3. Install the (2) back 4" legs and tighten.

4. Install the plastic drain tray onto the drain tray bracket. (Note: The drain tray is provided with a removable plug to
allow for plumbing the drain tray to a drain.)

5. Connect the metal swivel fitting provided to a flexible water supply hose. Ensure the water supply hose has
sufficient length to allow the machine to be moved for cleaning or service. Supplying hot water to the machine will
greatly increase the capacity of the machine. The use of copper tubing is required to prevent rupture when using
a hot water supply. Amaximum inlet water temperature of 160Þ F is recommended.

6. Ensure that the water supply to the machine is within 20 to 100psi. Install a pressure regulator if pressure is too
high.

American Metal Ware Liquid Coffee Dispenser Page 3

!

WARNING: ELECTRIC SHOCK HAZARD

Only qualified service personnel should perform installation of this appliance.
Improper installation could result in serious injury or death.

!

WARNING: ELECTRIC SHOCK HAZARD

Never use the ground conductor as a neutral conductor. Serious injury or
death could occur in the event of a fault condition.

!

WARNING: ELECTRIC SHOCK HAZARD

Always disconnect power to the machine before servicing or cleaning. Risk
of electric shock is present which can cause serious injury or death.

American Metal Ware Liquid Coffee Dispenser Page 4

Installation (cont.)

Electrical Hook-up: Ensure water connection is made to machine before proceeding

The electrical ratings for your dispenser are located on the serial plate on the outside cabinet. For configuration of
three heater models to optional wattages, refer to configuration manual 62210 supplied with the machine.

1. For cord connected models, plug the power cord into an appropriate grounded and dedicated electrical outlet.
Go to step 8.

2. For hard-wired models not supplied with a can electrical cord, the dispenser should be connected to a dedicated
circuit with a fused disconnect switch or a circuit breaker near the dispenser.

3. Strain relief knockouts are supplied on the back of the machine chassis for power entry.

• Electrical connections and wiring materials must conform to local codes and/or be in compliance with

the National Electric Code

• Use only copper conductors

4. Remove the access panel located on the upper left side of the dispenser. Note: wiring diagram is on backside
of access panel.

5. Connect the power supply conductors, neutral and ground wire to the appropriate positions on the terminal block
located on the upper left side of the dispenser. The ground lug is separate from the terminal block. Note: if
power supply available does not provide for a neutral conductor, a stepdown transformer must be installed to
provide the necessary 120 volt power supply for the control circuits. Consult factory for assistance.

6. Install the side access panel.

7. Flip power supply to machine “ON” at the branch supply disconnect.

8. Flip power switch to the “ON” position and allow the water tank to fill. The machine will make a subtle hissing
sound while filling. Allow 3-4 minutes for fill time depending on water pressure.

9. After the water tank has completed the fill cycle, the green Ready light located on the front of the dispenser
should extinguish signifying that the heating element has been activated. Allow 10-60 minutes for the Ready light
to illuminate signifying the water tank has reached operating temperature. (Note: Heatup time is dependent on
water inlet temperature and input wattage to the machine.)

Bag-in-Box Hook-up

1. Place bag-in-box containers inside the cabinet behind the front door. Connect the quick connect fitting to each
bag-in-box.

2. After connecting the bag-in-box, flip the water switch located behind the front door to the “OFF” position and flip
the concentrate switch to the “ON” position.

3. Activate the appropriate dispense switch on the front of the door in order to prime the concentrate lines with
product. Continue to activate the dispense switch until concentrate is dispensed from the appropriate dispense
spout.

4. Repeat steps for other dispense spout.

5. Flip water switch back to “ON” position.

6. Close front door and ensure that both water and product are dispensed simultaneously.

How to Dispense a Cup of Coffee

Attention: This machine employs an interlock switch to disable the dispense and fill circuits
when the front door is open. Ensure the front door is closed while installing or operating the
machine. A watchdog circuit also monitors the water level in the tank and will disable the
machine if the water level in the tank is not normal within (5) minutes of fill time. The machine
will require power to be reset to clear the watchdog timeout.

WARNING:

Do not use cups over 6 3/4" (15.2 cm) tall with this machine. Use of cups over this height could
result in severed burns and injury.

!

American Metal Ware Liquid Coffee Dispenser Page 5

How to Dispense a Cup of Coffee (cont.)

On models with manual dispense switches:

1. Place a cup under the selected drink dispense nozzle.

2. Push and hold dispense switch until cup is full and then release switch.

On models with portion control dispense switches:

1. Place a cup under the selected drink dispense nozzle.

2. Push button for one second, then release to dispense one serving.

Note: Portion may be cancelled by push and release of the switch.

Adjustments

Portion Adjustment (Portion control units only)

1. Place a cup under the selected drink dispense nozzle.

2. Press and hold the desired dispense switch and press and release the manual top-off button to activate the
programming sequence.

3. After a 10 second time delay, the machine is triggered into program mode and will begin dispensing.

4. Continue pressing the button until cup is full, then release the switch to prevent overfill. The elapsed portion
dispense time is saved to memory and will remain until the dispense switch is reprogrammed.

5. Check the portion size by placing an empty cup under the desired dispense nozzle, then press and release
the dispense switch. The machine will dispense the preprogrammed portion size.

6. If the portion size is incorrect, repeat steps 1, 2, 3, 4 & 5 until the desired portion size is achieved.

Thermostat

Adjustment

(Refer to Figure A)

Note: The thermostat range is approximately
160° to 200°F (71.11°C to 93.33°C). The tank temperature
is factory set at 190°F (87.78°C), making beverage
temperature slightly lower than 190°F (87.78°C).
The factory setting is recommended for liquid coffee based
concentrates. Other products may require different mixing
temperatures. Follow product manufacturer’s recommended
mixing water temperature for non-coffee products.

Temperature can be adjusted as follows:
Tool required: #2 Phillips screwdriver.

1. Unplug machine.

2. Remove the drip pan.

3. Remove the upper splash panel on the front of the machine

by removing the (4) Phillips head screws.

4. Remove control panel cover by loosening (2) screws enough

to allow keyholes in panel to clear the screw heads.

5. Locate the thermostat adjustment dial on the left side of the
control board. (Refer to Figure A)

6. To adjust the temperature of the water being dispensed, turn the adjustment dial on the control board. (Turn
clockwise to increase the water temperature or counter clockwise to decrease the water temperature.)

Figure A

!

CAUTION!

Do not force the adjustment dial beyond its 270 degrees of rotation or damage to the control board may
occur.

Adjustments (cont.)

Drink S

trength Adjustment

(Refer to Figure A& B)

Tools required: #2 Phillips Screwdriver

1. Dispense a drink to determine if drink is too strong or weak.

2. Turn off power to machine at power switch.

3. Remove front splash panel below dispense heads in front of machine.

4. Locate the mix ratio setting panel directly behind the front splash panel (see Figure B)

5. Adjust drink strength by determining the digital setting for the desired mix ratio. (Note: Clockwise will strengthen

product, counterclockwise will weaken the product.)

Note: (For Hot Chocolate see figure B and follow the same steps as above.)

Service and Cleaning

Daily Cleaning Instructions for the LCD Coffee Dispensers:

1. Wipe down all stainless steel surfaces of the dispense spout, bag-in-box cabinetry and drip tray areas with a clean
soft cloth using a mixture of one oz. (28 g) Ivory liquid detergent or equivalent to one gallon (3.8 litre) of fresh water.

2. Follow by wiping down all stainless steel surfaces of the dispense spout and cabinetry with a clean soft cloth
moistened with fresh water and allow to air dry.

3. Remove drain tray and wash in a three compartment sink with warm soapy water per above concentration until all
signs of product residue are removed, rinse thoroughly with fresh water and air dry.

Weekly Cleaning Instructions for the LCD Coffee Dispensers:

1. Flip water switch (a) to “OFF” position.

2. Remove fitting cap (a) from bag-in-box quick disconnect fitting then remove internal check valve parts by rotating the
retaining cap at the opposite end of the o-ring end. This will allow free flow of sanitizing solution through the
connector and faster cleaning.

2a. For Hot Chocolate disconnect BIB fitting and insert Scholle probe sanitizing attachment (not provided).

3. Insert the bag-in-box quick disconnect fitting into a one gallon (3.8 litre) basin of very warm (150°F/65.56°C) soapy
water. Use 1/2 oz. (14 g) Ivory liquid detergent or equivalent to one gallon (3.8 litre) of water.

4. Push and hold the corresponding dispense switch until clear soapy water is dispensed from the spout.

American Metal Ware Liquid Coffee Dispenser Page 6

Figure B

WARNING: ELECTRIC SHOCK HAZARD

Always disconnect power to the machine before servicing or cleaning. Risk of electric
shock is present which can cause serious injury or death.

!

Service and Cleaning (cont.)

Weekly Cleaning Instructions for the LCD Coffee Dispensers: (cont.)

5. Flush soapy water by repeating steps 3 and 4 using one gallon (3.8 litre) of very warm (150°F/65.56°C) water
without soap.

6. Prepare one gallon (3.8 liter) of food grade sanitizing solution in a container per manufacturer’s recommendations
and repeat step (4) until sanitizing solution is dispensed from the spout. Let sanitizing solution work for 5 minutes,
then flush the concentrate line by pushing and holding the dispense switch until the sanitizing solution dispenses
clear.
(Note: recommended sanitizing solution is KAY-5 Sanitizer/Cleaner; mix one oz. (28 g) packet of sanitizer powder

+ 2 1/2 gallons (9.5 litre) of warm (approximately 120°F/48.89°C) water to achieve a solution of 100ppm of
available chlorine).

7. Remove the bag-in-box connector from the sanitizing solution basin and purge the concentrate line by pushing and
holding the dispense switch until the concentrate tube runs dry.

8. Flush the concentrate line with fresh water by submerging the bag-in-box connector in a one gallon (3.8 litre)
container of fresh tap water and activating the corresponding dispense switch for one minute.

9. Re-assemble the bag-in-box connector, then reconnect the bag-in-box connector to a bag-in-box of concentrate.

10. Prime the concentrate line by pushing and holding the dispense switch until concentrate drips from the spout.

11. Flip the water switch to the “ON” position and dispense and discard (2) 6 oz. (168 g) drinks.

12. Repeat all steps for other dispense heads.

To prepare for shipment: Important - Always completely empty water tank and remove bag in box containers

prior to shipping unit. (See Draining the Tank and Cleaning the Concentrate Line Sections). Purge concentrate
lines.

Draining the Tank

Always empty the tank before shipping.

WARNING: Draining of tank should be performed by a qualified service technician. The tank contains
4 1/2 gallons (17.1 litre) of very hot water. May cause severe burns.

1. Prepare a 5 gallon (17.5 litre) heat resistant container to drain the tank water into.

2. Unplug the machine.

3. Remove the drain tray and front access panel.

4. Locate the silicone drain hose on the left side wall. Put the end of the drain hose into the bucket.
Secure the end of the drain hose (i.e. with tape) into the bucket.

5. Remove the hose clamp and plug.

6. Allow the tank to drain completely.

WARNING: Do not attempt to stop the flow of water once it begins to drain.

7. Once the tank is empty, securely replace the plug and clamp on the end of the hose. Reposition the drain
hose inside the hose clip on the left side wall.

8. Reassemble the front access panel and drain tray.

Purging Machine of all Water for Shipment in Cold Areas

WARNING: This procedure should be performed by a qualified service technician.

The unit can be purged of water as follows:

1. Turn the power switch to the "OFF" position.

2. Drain the water tank (refer to instructions on Page 6.) Do not replace the drain hose plug and clamp until
further instructed.

3. Turn the power switch to the "ON" position. The Ready light should turn itself on within 12 seconds. The 12
second delay signals that the heating element has been disabled due to the lack of water in the tank after it is
drained. Important: If the Ready light does not turn itself on within 12 seconds, turn the power off to

avoid burning out the heating element.

4. Listen for the inlet valve to energize. To purge the inlet valve and water inlet tube, apply 10-20 psi compressed air
to the inlet valve connection for 10 to 20 seconds while the inlet valve is energized. Note: Do not energize the
inlet valve for more than 5 minutes at a time. Otherwise, the watchdog timer will disable the inlet valve. If this
occurs, reset the machine by flipping the power switch off then on.

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American Metal Ware Liquid Coffee Dispenser Page 8

Figure C

Figure D

Service and Cleaning (cont.)

Changing the Lightbulb on Stainless Steel Models with a Backlit Merchandiser

(Refer to Figures C and D)

(Refer to serial tag to verify model number of your machine)

WARNING: Disconnect machine from branch electrical supply before changing the lightbulb

Note: The machine uses a F8T5 12" (30cm) 8 watt replacement bulb.

1. Open the merchandiser door.

2. Remove the (2) screws at each end of the lightbulb panel inside the door.

3. The panel will come down to allow the bulb to be changed.

4. Remove the old lightbulb by gently turning the lightbulb 1/4 turn to the left and pulling the bulb from the socket.

5. Install the new bulb by lining the pins on either end of the bulb parallel with the socket opening.

6. Gently insert both ends of the bulb into the socket and turn the bulb 1/4 turn to the right until the bulb locks into
place.

7. Replace the lightbulb panel. Reinstall the screws.

Changing the Lightbulb on Models W

ith a Backlit Merchandiser

(Refer to Figure E)

(Refer to serial tag to verify model number of your machine)

WARNING: Disconnect machine from branch electrical supply before changing the lightbulb.

Note: The machine uses a F8T5 12" (30cm) 8 watt replacement bulb.

1. Remove the front merchandiser photo and cover by grasping
the edges of the merchandiser.

2. Remove the old lightbulb by gently turning the lightbulb
1/4 turn to the left and pulling the bulb from the socket.

3. Install the new bulb by lining up the pins on either
end of the bulb parallel with the socket opening.

4. Gently insert both ends of the bulb into the socket
and turn the bulb 1/4 turn to the right until the bulb
locks into place.

5. Replace the merchandiser photo and cover.

Figure E