Grindmaster LCD2-1 User Manual

LIQUID COFFEE DISPENSERS

LCD2-1 & LCD2-3

OPERATIONS MANUAL

INSTALLATION

WATER INLET CONNECTION

The following is required for water hook-up:

• A quick disconnect water connection or enough coiled tubing so the machine can be moved for cleaning underneath. (required for NSF
approved water hook-up)

• A 1/4" male flare adapter is provided (packed inside the drain tray) to be attached by the installer to the back of the machine for hook-up
to water supply.

• Installation to a water filter system is required to prevent lime and scale build up in the machine.

• 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. (required for NSF approved water hook-up)

• Equipment is to be installed with adequate backflow protection to comply with applicable Federal, State, and local codes. (required for
NSF approved water hook-up)

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 a flexible water supply hose to 3/8-18 NPT connector in rear. 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. A maximum inlet water temperature of 120° F is
recommended.

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

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.)

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.

BAG-IN-BOX HOOK-UP

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

• 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.

• 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.

• Repeat steps for other dispense spout.

BAG-IN-BOX HOOK-UP (cont.)

• Flip water switch back to “ON” position.

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

HOW TO DISPENSE A CUP OF COFFEE

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
severe burns and injury.

On models with manual dispense switches:

• Place a cup under the selected drink dispense nozzle.

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

On models with portion control dispense switches:

• Place a cup under the selected drink dispense nozzle.

• 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)

• Place a cup under the selected drink dispense nozzle.

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

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

• 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.

• 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.

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

THERMOSTAT ADJUSTMENT

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.

• Unplug machine.

• Remove the drip pan.

• Remove the upper splash panel on the front of the machine by removing the (4) Phillips head screws.

• Remove control panel cover by loosening (2) screws enough to allow keyholes in panel to clear the screw heads.

• Locate the thermostat adjustment dial on the left side of the control board.

• 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.)

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

DRINK STRENGTH ADJUSTMENT (Refer to Figure A)

TOOLS REQUIRED: #2 PHILLIPS SCREWDRIVER

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

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

• Turn off power to machine at power switch.

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

• Locate the mix ratio setting panel directly behind the front splash panel
(see Figure A)

• Adjust drink strength by determining the digital setting for the desired

mix ratio.

(Note: Clockwise will strengthen product, counterclockwise will
weaken the product.)

LCD2-1 & LCD2-3

Figure A

77 77

Service and Cleaning

Daily Cleaning Instructions for the LCD Coffee Dispensers

• 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.

• 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.

• 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

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

• 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.

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

• 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.

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

• 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.

• 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 (1) 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.

• 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.

• 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.

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

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

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

• Repeat all steps for other dispense heads.
To prepare for shipment: Important - Always completely empty water tank, remove bag in box containers, and purge concentrate lines
prior to shipping unit.

LCD2-1 & LCD2-3

LCD2-1 & LCD2-3

TROUBLESHOOTING GUIDE

Problem

No hot water from dispense head

No concentrate is dispensed

Machine does not dispense or fill

Water is cold when dispensed

Drink is too weak or strong

Drink is too hot or cold

Off taste of coffee

If you still need help, call our service department at [phone] (USA & Canada only) or [phone] (Monday through Friday, 8 am - 8 pm EST)
or an authorized service center in your area. Please have the model and serial numbers ready so that accurate information may be given.

Prior authorization must be obtained from Grindmaster Corporation’s Technical Services Department for all warranty claims.

• Door is open (An interlock switch disables
the dispense and fill circuits when the door
is open)

• Faulty thermistor

• Faulty water tank heater

• Fill circuit watchdog timer has tripped

• Water switch is in “OFF” position

• Water supply to machine is turned off

• Check for flashing diagnostic lights on
control board

• Concentrate switch is in “OFF” position

• Bag-in-box is empty

• Bag-in-box connector is pointing up (This
position can create a partial vacuum in the
concentrate tube which may prevent product
from being pumped to the dispense spout)

• Concentrate pickup tube is kinked

• Concentrate pump tubing is clogged

• Transformer is blown

• Blown fuse on controller

• Fill circuit watchdog timer has been activated

• Faulty thermistor

• Faulty water tank heater

• Poor water quality, to include high chlorine
level, heavy mineral concentration or stale
water

• Ensure door is latched closed. Reset
power to machine to ensure fill circuit
watchdog timer is reset

• Consult factory for assistance

• Check for open heater and replace if
necessary

• Ensure water supply to machine is on and
reset power to machine. Green Ready
light off indicates heater is activated and
tank is heating

• Ensure switch is in “ON” position

• Ensure water supply is on then reset
power to the machine to reset the fill
circuit watchdog timer

• Ensure switch is in “ON” position

• Ensure bag-in-box is not empty; replace
with new bag-in-box if empty

• Position bag-in-box with connector
pointing down to provide a positive
pressure in the concentrate tube

• Inspect tubing routing and ensure
concentrate tubing is not kinked

• Periodically clean and sanitize tubing per
the Cleaning and Sanitizing procedure
section in this instruction manual

• (Refer to Control Diagnostic diagram)
Check if green LED on control board is
illuminated when machine is powered on.
Green LED indicates that control is
receiving proper supply voltage from
transformer. Replace transformer if
LED does not illuminate.

• Check fuse and replace if necessary

• Ensure water supply to machine is on
and reset power to machine to reset
watchdog timer

• Check if Red “Therm/Fail” LED is
illuminated. Replace thermistor if LED
is illuminated.

• Check for “open” heater and replace
if necessary

• Refer to Drink Strength Adjustment

section

• Refer to Thermostat Adjustment
section

• Addition of a taste and odor filter to
incoming water

• Drain water from tank, remove and
delime. If necessary, flush tank with
fresh water.

The following procedures must be performed by a qualified service technician.

Possible Cause Solution

LCD2-1 & LCD2-3

Models LCD2-1 & LCD2-3 Parts List

Part #

61108
61128
61131
61191

61800-02

61822
61994
61999
61805
62249
62251
62264
62265
62274
62293
62297
62338
68133
71147

DESCRIPTION

PROBE, WATER LEVEL
PROBE, THERMISTOR
RELAY, HEATER
SWITCH, VACUUM 14” BDR
CONTROLLER, AUTO/REMOTE/3-PORTION
TUBING, 3/16 ID PUMP TUBING
PUMP, 3 ROLLER
CAP, LCD DISPENSE SPOUT
FITTING, QCD LIQUIBOX
RESTRICTOR, LCD SPOUT
VALVE, DUMP
ELEMENT, HEATING 240V 5000W
ELEMENT, HEATING 240V 6600W
DIFFUSER, SPOUT
TUBING, 1/8 ID PUMP TUBING
VALVE, INLET 2.5GPM
PUMP, 2 ROLLER
FITTING, SCHOLLE “T” BIB
GROMMET, PROBE

62265

62264

71147

61128

62297

62251

61191

62274

68133

61805

61108

61822

62293

62338

61994

61131

61999

62249

Controller
61800-02 - Auto/Remote/3-Portion
61800-05 - Manual/Remote
62354 - LCD 2-3-*-M models

10 Minute dispense max.

Grindmaster® Coffee Grinders and Brewers • PrecisionBrew™ Brewing Systems • Espressimo® Espresso Machines

Crathco® Hot Beverage Dispensers • Crathco® Cold and Frozen Beverage Dispensers • AMW Coffee and Tea Systems

Tel [phone] • Fax [phone] • 1-800-695-4500 (USA & Canada only)

P.O. Box 35020 • Louisville, KY 40232 • USA

www.grindmaster.com • email: [e-mail]

0307 Form # AM-330-04

Part # 62280

© Grindmaster Corporation, 2006
PRINTED IN USA