Ice-O-Matic UCG060A, UCG080A, UCG100A, UCG130A Installation Manual

UCG GOURMET SERIES UNDERCOUNTER
MODELS- UCG060A, UCG080A, UCG100A, UCG130A
Installation and Service Manual
Ice-O-Matic 11100 E. 45 Denver, Colorado 80239 Part Number 9081522-01 1-866-PURE-ICE Revision 09/20
th
Ave.
UCG GOURMET SERIES UNDERCOUNTER
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UCG GOURMET SERIES UNDERCOUNTER
CAUTION: Incorrect voltage supplied to the ice
WARNING: This ice maker is designed for indoor installation only.
GENERAL INFORMATION AND INSTALLATION
A. INTRODUCTION
This manual provides the specifications and the step-by step procedures for the installation, start up, operation, cleaning, and maintenance for the Ice-O-Matic UCG Undercounter Series ice makers. To
retain the safety and performance built into this ice maker, it is important that installation and maintenance be conducted in the manner outlined in this manual.
For more technical information, refer to www.iceomatic.com.
B. UNPACKING AND INSPECTION
1. Call your authorized Ice-O-Matic Distributor or Dealer for proper installation.
2. Visually inspect the exterior of the packaging and skid. Any severe damage noted should be
reported to the delivering carrier.
3. Cut and remove the plastic strip securing the carton box to the skid. Cut open the top of the
carton and remove the protection sheet. Pull out the corner posts, and then remove the carton.
4. Remove the front panel of the unit, and inspect for any concealed damage. Notify the carrier
of any concealed damage.
5. Check that refrigerant lines do not rub against or touch other lines or surfaces, and the fan
blade moves freely.
6. Check that the compressor fits snugly onto all its mounting pads.
7. Remove all internal support packaging and masking tape.
8. Use a clean, damp cloth to wipe the surfaces inside the storage bin and the outside of the
cabinet.
9. See data plate on the rear side of the unit and check that local main voltage corresponds with
the voltage specified on it.
maker will void your parts replacement program.
10. Register the unit at www.iceomatic.com/warranty.
11. Install and adjust legs provided to level the unit.
C. LOCATION AND LEVELING
Extended periods of operation at temperatures exceeding the following limitations will constitute misuse under the terms of the Ice-O-Matic Manufacturer’s Limited Warranty, resulting in loss of warranty coverage.
1. Position the unit in the selected permanent location. Criteria for selection of location include:
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UCG GOURMET SERIES UNDERCOUNTER
NOTE: All external wiring should conform to national,
a. Minimum room temperature of 50˚F (10˚C) and maximum room temperature of
100˚F (40˚C).
b. Minimum water inlet temperature of 40˚F (5˚C) and maximum water inlet
temperature of 90˚F (35˚C).
c. Well ventilated location. d. Service access: adequate space must be left for all service connections through the
rear of the ice maker. A minimum clearance of 6” (15cm) must be left at the sides of the unit for routing air drawn into and exhausted out of the compartment to maintain proper condensing operation.
2. Level the unit in both the left to right and front to rear directions.
D. ELECTRICAL CONNECTIONS
See data plate for current requirements to determine wire size to be used for electrical connections. All Ice-O-Matic ice makers require a solid earth wire. They are supplied from the factory completely pre-wired and require only electrical power connections to the wire cord provided at the rear of the unit. Make sure the ice maker is connected to its own circuit and individually fused (see data plate for fuse size). The maximum allowable voltage variation should not exceed -10% and +10% of the data plate rating. Low voltage can cause faulty functioning and may be responsible for serious damage to the overload switch and motor windings. Check voltage on the line and the ice maker’s data plate before connecting the unit.
state, and local standards and regulations.
E. WATER SUPPLY AND DRAIN CONNECTIONS
GENERAL
When choosing the water supply for the ice maker consideration should be given to:
a. Length of run b. Water clarity and purity c. Adequate water supply pressure
Since water is the most important single ingredient in producing ice, the three items listed above are extremely significant. Low water pressure, below 14 psi (1 bar), may cause malfunction of the ice maker. Water containing excessive minerals will tend to produce cloudy ice cubes, in addition to scale build-up on parts of the water system.
WATER SUPPLY
Connect the ¾” male fitting of the solenoid water inlet valve, using the flexible tube supplied, to the cold-water supply line with regular plumbing fitting and a shut-off valve installed in an accessible
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UCG GOURMET SERIES UNDERCOUNTER
NOTE: The water supply and the water drain must be
position between the water supply line and the unit. If water contains a high level of impurities, it is advisable to consider the use of an appropriate water filter.
WATER DRAIN
The recommended drain tube is a plastic or flexible tube with ¾” (18mm) I.D. which runs to an open trapped and vented drain.
installed to conform with the local code. In some cases, a licensed plumber and/or a plumbing permit is required.
The water can be pumped out up to 30m on horizontal length.
F. FINAL CHECK LIST
1. Is the unit in a room where the ambient temperatures are within a minimum of 50˚F (10˚C)
even in winter months?
2. Is there at least a 6” (15cm) clearance around the unit for proper air circulation?
3. Is the unit level? (IMPORTANT)
4. Have all the electrical and plumbing connections been made, and is the water supply shut-off
valve open?
5. Has the voltage been tested and checked against the data plate rating?
6. Has the water supply pressure been checked to ensure a water pressure of at least 14 psi (1
bar)?
7. Check all refrigerant lines and conduit lines to guard against vibrations and possible failure.
8. Have the bolts holding the compressor down been checked to ensure that the compressor is
snugly fitted onto the mounting pads?
9. Have the bin liner and cabinet been wiped clean?
pg. 5
10. Has the owner/user been given the Installation and Service Manual and been instructed on
WARNING: This icemaker is not designed for outdoor installation and will not function in
malfunction with water temperatures below 40˚F (5˚C) or above 90˚F (35˚C).
NOTE: Every time the unit returns under power, after having been switched off,
the importance of periodic maintenance checks?
11. Has the unit been registered for warranty? Check for correct model and serial number against
the serial plate.
12. Has the owner been given the name and the phone number of the authorized Ice-O-Matic
Service Agency serving him/her?
G. INSTALLATION PRACTICE
ambient temperatures below 50˚F (10˚C) and above 100˚F (40˚C). This ice maker will
UCG GOURMET SERIES UNDERCOUNTER
OPERATING INSTRUCTIONS
START UP
After having correctly installed the ice maker and completed the plumbing and electrical connections, perform the following “start-up” procedure.
A. Plug in the ice maker. Unit will start up in charging cycle mode.
the water inlet valve, the hot gas valve, and the water drain valve get energized for a period of 5 minutes, allowing water to the machine sump reservoir to fill up and to wash off any dirt that has been deposited. (Fig. 1.)
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UCG GOURMET SERIES UNDERCOUNTER
NOTE: If in the 5 minutes during water fill phase the machine sump reservoir does
B. During the water filling operation, check to verify that the incoming water dribbles, through the
evaporator plate dribbler holes, down into the sump reservoir to fill. Also, check that the incoming surplus of water flows out through the overflow pipe into the drain line. During the water fill phase, the components energized are:
1. Water inlet solenoid valve
2. Hot gas solenoid valve
3. Water drain solenoid valve
not get filled with water up to the rim of the overflow pipe, it is advisable to check:
1. The water pressure of the water supply line that must be at least 14psig (1
bar) minimum and 70psig (5 bar) maximum.
2. The filtering device installed in the water line that may reduce the water
pressure below the minimum value of 14psig (1 bar).
3. Any clogging situation in the water circuit like the inlet water strainer
and/or the flow control.
C. At completion of the water fill phase (5 minutes) the unit passes automatically into the freezing cycle
with the start up of the compressor, water pump, and fan motor (controlled by the condensing temperature sensor located within the condenser fins (Fig. 2).
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UCG GOURMET SERIES UNDERCOUNTER
NOTE: The condenser temperature sensor, which is located within the condenser
In case the air filter is clogged, preventing the proper flow of air or, in case the fan
D. Install, if required, the refrigerant service gauges on both the high side and low side Schrader valves
to check the compressor head and suction pressures.
fins, keep the head (condensing) pressure between 110-130psig (8.5-9.5 bar).
motor is out of operation, the condenser temperature rises and when it reaches 160˚F (70˚C), the condenser temperature sensor shuts off the ice maker with the light up of the red warning LED (Fig. 3) as well as the red alarm light (ON steady).
After having diagnosed the cause of the temperature increase and corrected it, then it is necessary to unplug (wait a few seconds) and plug back in, thus restarting the freeze cycle.
The machine restarts with the usual 5 minutes water fill phase in order to provide enough water into the sump tank.
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UCG GOURMET SERIES UNDERCOUNTER
E. Check to see through the ice discharge opening that the spray system is correctly seated and that the
water jets uniformly reach the interior of the inverted mold cups. Also, make sure that the plastic curtain is hanging freely and there is not excessive water spilling through it.
F. The ice making process begins with the water sprayed into the molds that gets gradually refrigerated
by the heat exchange with the refrigerant flowing into the evaporator serpentine. During the freeze cycle, the evaporator temperature falls to 32˚F (0˚C) (red LED blinking as per Fig. 4) and then to 5˚F (- 15˚C) (red LED ON steady as per Fig. 4a). When it reaches 5˚F (-15˚C), the evaporator temperature sensor supplies a low voltage power signal to the electronic control device (PC Board) in order to activate an electronic timer. This takes over the control of the freeze cycle up to the complete formation of the ice cubes.
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UCG GOURMET SERIES UNDERCOUNTER
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UCG GOURMET SERIES UNDERCOUNTER
NOTE: The length of the defrost cycle is automatically determined by the PC Board in
G. After about 17-20 minutes from the beginning of the freeze cycle, in a hypothetical ambient
temperature of 70˚F (21˚C), the defrost cycle takes place with the hot gas, the water inlet, and the water drain valves simultaneously activated (Fig. 5). The electrical components in operation on these models are the compressor, water inlet valve, hot gas valve, water drain valve, and the water pump in the first 15 seconds.
relation of the time necessary for the unit to reduce the evaporator temperature from 32˚F (0˚C) small red LED blinking to 5˚F (-15˚C) small red LED ON steady - time T2. It is possible to extend the length of the defrost cycle by changing the setting of the dip switch 7 and 8 as shown on the table on page 22.
H. Check, during the defrost cycle, that the incoming water flows correctly into the sump reservoir in
order to refill it and that the surplus overflows through the overflow drain tube.
I. Check the texture of ice cubes just released. They have to be in the right shape with a small depression
of slightly less than ¼” (about 5-6mm) in their crown. If not, wait for the completion of the second cycle before performing any adjustment. If the ice cubes are shallow and cloudy, it is possible that the ice maker runs short of water during the freeze cycle second phase or, the quality of the supplied water requires the use of an appropriate water filter.
J. As soon as the water into the sealed water reservoir reaches the maximum level, the two metal pins
close the electrical contact through the water, transmitting a low voltage current to the PC Board. The PC Board activates the water drain pump for 8 seconds pumping out most of the water contained into the sealed water reservoir.
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UCG GOURMET SERIES UNDERCOUNTER
K. To be sure of the correct operation of bin thermostat, hold ice against the bin thermostat for 2
minutes. The unit should turn OFF.
L. Remove, if fitted, the refrigerant service gauges and refit the unit service panels previously removed.
M. Instruct the owner/user on the general operation of the ice machine and about the cleaning and care
it requires.
PRINCIPLE OF OPERATION
In the Ice-O-Matic cube ice makers, the water used to make the ice is kept constantly in circulation by an electric water pump which primes it to the spray system nozzles form where it is diverted into the inverted mold cups of the evaporator. A small quantity of the sprayed water freezes into ice; the rest of it cascades by gravity into the sump assembly below for recirculation.
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UCG GOURMET SERIES UNDERCOUNTER
A. FREEZE CYCLE
The freeze cycle is controlled by the evaporator temperature sensor (which has its probe in contact with the evaporator serpentine) that determines the length of its first portion of the cycle. When the temperature of the evaporator serpentine drops to a pre-set value (small red LED ON steady) the evaporator sensor probe changes its electrical resistance allowing a low voltage current (15 volts) to flow to the PC Board which in turn activates an electric timer. The timer, which is built into the PC Board, takes over from the evaporator temperature sensor, and controls the freeze cycle to completion.
The change of the electric potential of the evaporator sensor with the consequent activation of the timer (time mode) is signaled by the glowing of the RED LED located in the front of the PC Board.
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UCG GOURMET SERIES UNDERCOUNTER
NOTE: If after 15 minutes in the freeze cycle the temperature of the
evaporator sensor probe is higher than 32˚F (0˚C) – small red LED still OFF – (shortage of refrigerant, inoperative hot gas valve, etc.) the PC Board will switch the unit OFF immediately with the simultaneous blinking of the WARNING RED LED.
The length of this timed portion of the freeze cycle is pre-fixed and related to the setting of the first four DIP SWITCH keys. The DIP SWITCH key settings are made in consideration of the type of condenser used and size of ice cubes.
Table B indicates the various lengths of the timed portion of the freeze cycle in relation to the different combinations of the DIP SWITCH keys. The electrical components in operation during the freeze cycle are the compressor, fan motor, and water pump. During the second phase of the freeze cycle (time mode), they are joined by the electronic timer.
The condenser temperature sensor senses a rising of the condenser temperature beyond the pre­fixed limit, changes its electrical resistance, and transmits a low voltage power flow to the microprocessor of the PC Board, which in turn energizes the fan motor.
When the opposite situation occurs, i.e. the condenser temperature gets below the pre-fixed limit, the temperature sensor changes again its electrical resistance reducing the current flow to the PC Board, causing the fan motor to temporarily cut off.
In case the condenser temperature probe senses that the condenser temperature has risen to 160˚F (70˚C), the cause is one of the following reasons:
• Clogged condenser
• Fan motor malfunction
• Ambient temperature higher than 100˚F (40˚C)
The reasons above will cause the total and immediate shut off of the machine in order to prevent the unit from operating in abnormal and dangerous conditions. When the ice maker stops on account of this protective device, there is a simultaneous glowing of the RED LED and RED LIGHT (STEADY), warning the user of the HIGH TEMPERATURE situation. After having eliminated the source of the condenser high temperature, restarting the machine is necessary. The ice machine will resume its normal operation by going through the 5-minute water fill phase.
B. DEFROST OR HARVEST CYCLE (FIG. E AND G)
As the electronic timer has carried the system throughout the second phase of the freeze cycle, the defrost cycle begins.
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UCG GOURMET SERIES UNDERCOUNTER
NOTE: In case the unit is able to reach 32˚F (0˚C) evaporating temperature
within 15 minutes, but after 45 minutes from the beginning of the freeze cycle it has not yet reached the evaporator temperature of 5˚F (-15˚C), the machine goes straight into the defrost cycle omitting the timed portion of the freeze cycle per the setting of the first four DIP SWITCHES.
The length of the defrost cycle is related to the length of the second phase of the freeze cycle T2. (Time to drop the evaporating temperature from 32˚F (0˚C) – small red LED blinking – to 5˚F (-15˚C) small red LED ON steady. It is possible to extend the length of the defrost cycle by changing the setting of the DIP SWITCH 7 and 8 as shown on the table on page 22.
The electrical components in operation during this phase are the compres sor, water inlet valve, hot gas valve, and water drain valve.
The incoming water, passing through the water inlet valve and the flow control, runs over the evaporator plate and then flows by gravity through the dribbler holes down into the sump/reservoir. (Fig. F and H). The water filling the sump/reservoir forces part of the surplus water from the previous freeze cycle to go out to the waste through the overflow pipe. This overflow limits the level of the sump water, which will be used to produce the next batch of ice cubes. Meanwhile, the refrigerant as hot gas, discharged from the compressor, flows through the hot gas valve directly into the evaporator serpentine by-passing the condenser. The hot gas circulating into the serpentine of the evaporator warms up the copper molds, causing the defrost of the ice cubes. The ice cubes, released from the cups, drop by gravity onto a slanted cube chute, then through a curtained opening they fall into the storage bin. At the end of the defrost cycle, the hot gas valve, the water inlet valve, and the water drain valve close and the machine starts again a new freeze cycle.
C. OPERATION – CONTROL SEQUENCE
At the start of the freeze cycle the evaporator temperature sensor controls the length of the first part of the freeze cycle. As it reaches a predetermined temperature it supplies a low voltage current to the PC Board in order to activate the electronic timer, which takes over the control of the freeze cycle for a pre-fixed time, according to the DIP SWITCH keys setting (see Tab. B).
The evaporator temperature sensor, factory pre-set, is the same for all the models and is not adjustable in the field.
Once the freeze cycle is completed, the system goes automatically into the defrost cycle which has also a pre-fixed length. At completion of the defrost cycle, the PC Board commands the unit to start again a new freeze cycle.
D. OPERATION – ELECTRICAL SEQUENCE
The following charts illustrate which switches and which components are ON or OFF during a particular phase of the ice making cycle. Refer to the wiring diagram for a reference.
1. BEGINNING FREEZE
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UCG GOURMET SERIES UNDERCOUNTER
Electrical Components (Loads)
ON
OFF
Compressor……………………………..
Fan Motor and TRIAC……………….
Hot Gas Valve…………………………..
 Water Inlet Valve……………………..
 PC Board Relay 1 Coil……………….
 PC Board Relay 2 & 3 Coil…………
Water Pump…………………………….
PC Board Timer………………………..
Electronic Controls & Sensors
ON
OFF
Evaporator Sensor…………………..
 Condenser Sensor…………………….
Bin Thermostat…………………………
Electrical Components (Loads)
ON
OFF
Compressor……………………………..
Fan Motor and TRIAC……………….
Hot Gas Valve…………………………..
 Water Inlet Valve……………………..
 PC Board Relay 1 Coil……………….
 PC Board Relay 2 & 3 Coil…………
Water Pump…………………………….
PC Board Timer………………………..
Electronic Controls & Sensors
ON
OFF
Evaporator Sensor…………………..
Condenser Sensor…………………….
Bin Thermostat…………………………
Electrical Components (Loads)
ON
OFF
Compressor……………………………..
Fan Motor and TRIAC……………….
 Hot Gas Valve…………………………..
Water Inlet Valve……………………..
PC Board Relay 1 Coil……………….
PC Board Relay 2 & 3 Coil…………
 Water Pump…………………………….
 PC Board Timer………………………..
Electronic Controls & Sensors
ON
OFF
Evaporator Sensor…………………..
 Condenser Sensor…………………….
 Bin Thermostat…………………………
2. TIMED FREEZE
3. HARVEST
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UCG GOURMET SERIES UNDERCOUNTER
4. REFRIGERANT METERING DEVICE
Capillary Tube
5. COMPONENTS DESCRIPTION
a. Evaporator Temperature Sensor
The evaporator temperature sensor probe, located in contact with the evaporator serpentine, detects the dropping of the evaporator temperature during the freeze cycle and signals it by supplying a current flow to the microprocessor of the PC Board. According to the current received, the small red LED of the PC Board is energized (blink or steady). When steady, the microprocessor supplies power to the electronic timer built into the PC Board so that it takes control of the last portion of the freeze cycle. The length of the timed phase is pre-fixed by the setting of the keys 1, 2, 3, and 4 of the DIP SWITCH.
If after 15 minutes from the beginning of the freeze cycle, the evaporating temperature has not yet reached 32˚F (0˚C) – small red LEF OFF – the PC Board switches OFF the machine with the blinking of WARNING RED LED.
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UCG GOURMET SERIES UNDERCOUNTER
b. Condenser Temperature Sensor
The condenser temperature sensor probe, located within the condenser fins, detects the condenser temperature variations and signals them by supplying current, a low voltage, to the PC Board. In relation to the different current received, the microprocessor of the PC Board supplies, through a TRIAC, the power at high voltage to the fan motor in order to cool the condenser and to reduce its temperature. In case the condenser temperature rises and reaches 160˚F (70˚C), the current arriving to the microprocessor will immediately shut down the machine.
c. Bin Thermostat
If the bin thermostat is open at the completion of harvest, the unit will shut down.
d. PC Board
The PC Board, in the control box, located in the front of the unit, consist of two separate printed circuits – one at high and one at low voltage. Integrated with fuse for power output (6.3A), four aligned LEDs monitor the operation of the machine. It consists of one extra monitoring RED LED (blink 32˚F (0˚C) – steady - 60˚F (15˚C)), one DIP SWITCH block with ten keys, one push button, input terminals for the leads of the sensor probes, and input and output terminals for the leads of the ice maker electrical wires.
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UCG GOURMET SERIES UNDERCOUNTER
At restart, from tripping OFF at bin full, the new PC Board assures 45 seconds water fill phase to refill the water sump up to the maximum level.
On the PC Board there are four jumpers to select:
0 or 12 months remind time for the water system cleaning
• Operation of the purge out water pump
• “No delay” or 60 minutes delay time at first start up
• TEST
In case the TEST contacts are closed with the jumper, at the start up of the machine, the PC Board energizes all the electrical components for a maximum of 3 minutes.
At the end of the 3 minutes, the PC Board switches OFF the entire machine with the blinking of all the LEDs as shown on the drawing below.
e. Push Button Operation
During water filling phase:
When pushed for more than 2 seconds but less than 5 seconds, the machine
enters in Cleaning Mode
When pushed for more than 5 seconds, the machine will by-pass the water
fill phase
During freeze/harvest cycle:
When pushed for more than 5 seconds during the freeze cycle, the machine
goes immediately into harvest
When pushed for more than 5 seconds during the harvest cycle, the machine
enters immediately in the freeze cycle
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f. LED Meaning
LED
STATUS
REASON WHY
ON STEADY
UNIT UNDER POWER
ON STEADY
FREEZE CYCLE
BLINKING
60 MINUTES DELAY AT START UP JUMPER J3 OUT
ON STEADY
HIGH DISCHARGE PRESSURE/TEMP
BLINKING
HIGH EVAP TEMP (>32˚F/0˚C) AFTER 15 MINUTES FROM START UP
ON STEADY
UNIT OFF AT BIN FULL
BLINKING
UNIT IN CLEANING MODE OR
GREEN LED ON – unit powered ON
YELLOW BIN FULL LED ON – unit shut OFF with full bin
RED ALARM LED ON – high condensing temperature
RED ALARM LED BLINKING – high evaporating temperature
YELLOW FREEEZE CYCLE ON – unit in freeze cycle mode
YELLOW FREEZE LED AND RED ALARM LED ON – condenser sensor
malfunction
YELLOW FREEZE LED AND RED ALARM LED BLINKING – evaporator sensor
malfunction
UCG GOURMET SERIES UNDERCOUNTER
TRIPPING OFF AFTER TEST – JUMPER TEST IN
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UCG GOURMET SERIES UNDERCOUNTER
ON STEADY
CONDENSER SENSOR MALFUNCTION
BLINKING
EVAPORATOR SENSOR
PUSH >5 SECONDS DURING WATER FILL TO
TIME TO BY-PASS IT
HARVEST
CYCLE LENGTH
PROGRAMS
A B C
D
MALFUNCTION
MOVE THE UNIT INTO FREEZE
PUSH >5 SECONDS DURING FREEZE TO MOVE
THE UNIT INTO DEFROST
PUSH >5 SECONDS DURING DEFROST TO MOVE
THE UNIT INTO FREEZE
PUSH 2 SECONDS-5 SECONDS DURING WATER
FILL TO MOVE TH EUNIT INTO CLEANING
PUSH DURING THE 60 MINUTE START UP DELAY
g. Dip Switch
The PC Board which controls the entire operation of the ice maker, has a DIP SWITCH with ten switching keys, which allow to set up the microprocessor program in order to extend or to shorten the length of freeze cycle in relation to the different model and versions ice machines.
The DIP SWITCH first four keys setting determines the length of the 2
nd
phase of
freeze cycle (controlled by the electronic timer) as detailed in Table B.
The DIP SWITCH keys 5 & 6 setting determines the length of the defrost cycle according to the size of the cubes (large or medium) as per the following setting:
ON ON : PROGRAM A ON OFF : PROGRAM B OFF OFF : PROGRAM C OFF ON : PROGRAM D
LENGTH OF THE HARVEST CYCLE ACCORDING TO THE TIME TO DROP THE EVAP
TEMP FROM 32˚F (0˚C) TO 5˚F (-15˚C)
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UCG GOURMET SERIES UNDERCOUNTER
180 seconds
Up to 6 min
30 sec
***
Up to 9 min
30 sec
***
165 seconds
6 min 30 sec –
7 min
Up to 3 min
9 min 30
sec – 10 min
***
150 seconds
7-8 min
3 min – 3
min 15 sec
10-11 min
***
135 seconds
8-9 min
3 min 15
30 sec
11-12 min
***
120 seconds
9 min - 10 min
3 min 30
30 sec
12 min – 13
˂3 min
105 seconds
10 min 30 sec
– 12 min
4 min 30
sec – 6 min
13 min 30
sec – 15 min
3-4 min
90 seconds
˃12 min
˃6 min
˃15 min
˃4 min
DIP SWITCH
ADDITIONAL DEFROST TIME
7
8 ON
ON 0 OFF
ON
30 seconds
ON
OFF
60 seconds
sec – 3 min
30 sec
sec – 4 min
min 30 sec
The DIP SWITCH keys 7 & 8 setting allow the extension of the length of the harvest/defrost cycle according to their combination as per the following chart:
With both the DIP SWITCH 7 & 8 in OFF position, the water pump is OFF during the harvest cycle with no additional time.
th
The 9
key is used to supply power to the water pump for the first 15 seconds of the
defrost cycle – position OFF – or for the first 30 secondsposition ON.
The 10
th
key is used to modify the CUT-OUT condensing temperature from 160˚F (70˚C) –
ON position.
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UCG GOURMET SERIES UNDERCOUNTER
h. Condenser Air Filter
Located in front of the air condenser, it can be removed by withdrawing it through the opening of the front panel for cleaning or replacing.
i. Water Spray System
Water is pumped and sprayed (through the nozzles) into each individual cup to be frozen into ice. It consists of one spray tube and several spray nozzles.
j. Water Inlet Solenoid Valve
The water inlet solenoid valve is activated by the microprocessor of the PC Board during the first 5 minutes of the water filling phase as well as during the defrost cycle. When energized, it allows a metered amount of incoming water to flow over the evaporator cavity to assist the hot gas in defrosting the ice cubes. The water running over the evaporator cavity drops by gravity, through the dribble holes of the plate, into the sump reservoir, where it will be pumped by the water pump to prime the spray system.
k. Hot Gas Solenoid Valve
The hot gas solenoid valve consists basically in two parts: the valve body ad the valve coil. Located on the hot gas line, this valve is energized through the microprocessor of the PC Board during the defrost cycle as well as during the water filling phase. During the defrost cycle, the hot gas valve coil is activated to attract the hot gas valve piston in order to give way to the hot gas discharged from the compressor to flow directly into the evaporator serpentine to defrost the formed ice cubes.
l. Fan Motor
The fan motor is controlled through the PC Board and the TRIAC by the condenser temperature sensor. Normally, it operates only during the freeze cycle to draw cooling air through the condenser fins. In the second part of the freeze cycle, the fan motor can run intermittently as the condenser pressure must be kept between two corresponding head pressure values.
m. Compressor
The hermetic compressor is the heart of the refrigerant system and is used to circulate and retrieve the refrigerant throughout the entire system. It compresses
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UCG GOURMET SERIES UNDERCOUNTER
Model
Electrical
Fuse
(Amp)
Amps
Refrigerant
R290A
UCG060A
115/60/1
15
5.1
4.23 oz (120 g)
UCG080A
115/60/1
15
3.9
4.23 oz (120 g)
UCG100A
115/60/1
15
5.6
4.4 oz
(125 g)
UCG130A
115/60/1
15
6.0
3.49 oz
(99 g)
the low-pressure refrigerant vapor causing its temperature to rise and become high pressure hot vapor, which is then released through the discharge valve.
UNIT REFRIGERANT CHARGES
The UCG Undercounter Series contains R290A refrigerant. See table below for specifics by model.
(volts/Hz/phase)
Size
(Unit RLA)
Charge
pg. 24
UCG GOURMET SERIES UNDERCOUNTER
WARNING: Before proceeding with any cleaning and
CLEANING
Ice-O-Matic recommends cleaning the ice machine every 6 months, but not more than once per month to avoid potential damage to the machine.
maintenance operation, make sure the power is disconnected and water supply is turned off.
A. Water Section
Remove the spray platform from the interior of the evaporator case. Thoroughly clean the spray platform by plunging them into a basin filled with lukewarm water mixed with a descaling solution, then rinse thoroughly with tap water.
B. Storage Bin
Remove ice from the storage bin. Wipe clean the bin lining, using a mild detergent solution diluted in lukewarm water. Rinse it, then thoroughly disinfect the surfaces by wiping them with a sanitizer. Rinse thoroughly.
C. Cabinet
Use a soft cloth with a mild detergent solution specific for stainless steel.
D. Condenser Air Filter
The air filter is located in front of the condenser. It can be removed by pulling it through the opening in the front panel for cleaning or replacing. Withdraw the air filter from the front through the opening of the front panel. Remove the front panel. Blow pressurized air on the opposite direction of the condenser air flow to remove the dust accumulated. If pressurized air is not available, use tap water always in the counter flow air direction. Once cleaned, shake it to remove most of the accumulated water. Allow it to dry before inserting it back into the machine.
E. Condenser Sensor
The condenser temperature sensor probe, located within the condenser fins detects the condenser temperature variations and signals them by supplying current, at low voltage, to the PC Board.
In case the condenser temperature rises and reaches 160˚F (70˚C), the control system will cause an immediate and total stop of the machine’s operation.
pg. 25
ADJUSTMENT PROCEDURES
If the cubes are too shallow (indentation is too deep),
NOTE: Before performing actual adjustment of the
A. ADJUSTMENT OF THE CUBE SIZE
UCG GOURMET SERIES UNDERCOUNTER
If the cubes are oversize (indention is too full), most
cube size, check other possible causes for cube size problems, refer to the Service Diagnosis Section for problem review and analysis. Do not perform any adjustment until the ice making system has progressed through several complete freeze and harvest cycles in order to observe the size and quality of ice cubes and whether or not the cube size problem exists.
most likely the length of the second phase of the freeze cycle is too short. To extend the length:
1. Locate the DIP SWITCH on the front of the PC
Board.
2. Take note of the combination of the first four
DIP SWITCH KEYS to correspond to the prior combination shown on Table B.
3. Set the same DIP SWITCH KEYS to correspond to
the prior combination shown on Table B which allow an extension of two more minutes of the length of the freeze cycle.
4. Observe the ice cubes in the next two harvests
and eventually repeat steps 2 and 3 above until proper ice cube size is achieved. See figure.
likely the length of the second phase of the freeze cycle is too long. To shorten the length:
1. Locate the DIP SWITCH on the front of the PC
Board.
2. Take note of the combination of the first four
DIP SWITCH KEYS and check the corresponding length of the freeze cycle 2
3. Set the same DIP SWITCH KEYS to correspond to
the next combination shown on Table B which allows a reduction of two minutes of the length of the freeze cycle.
4. Observe the ice cubes in the next two harvests
and eventually repeat steps 2 and 3 above until proper ice cube size is achieved. See figure.
nd
phase on Table B.
pg. 26
SERVICE DIAGNOSIS
SYMPTOM
POSSIBLE CAUSE
SUGGESTED CORRECTION
Unit will not run:
LED blinks
Compressor cycles
Low voltage
Mechanical problem
Check circuit for overloading.
Replace compressor.
UCG GOURMET SERIES UNDERCOUNTER
No warning LED glows
Green LED-Power ON glows
• Bin full LD glows
Red-alarm LED glows
Red-alarm LED blinks
Freezing LED + Red-alarm
LED glows and red-alarm blinks twice and repeats
Freezing LED + red-alarm
Blown power in fuse in PC Board
Main switch in OFF position
Inoperative PC Board
Loose electrical connections
Blown power out fuse in PC Board
Inoperative bin thermostat
Inoperative PC Board
High head pressure
High evaporating temperature after 15 minutes beginning freeze
Condenser sensor malfunction
Evaporator sensor malfunction
Replace fuse and check for cause of blown fuse
Turn switch to ON position
Replace PC Board
Check wiring
Replace fuse and check for cause of blown fuse
Clean or replace bin thermostat
Replace PC Board
Inoperative fan motor. Replace.
Hot gas valve leak; replace. Water inlet valve leak; replace. Short of refrigerant. Compressor cycles intermittently.
Replace.
Replace.
intermittently
Non-condensable gas in system
Compressor starting device with loose wires
Check voltage at the supply to the building. If low, contact the power company.
Purge the system, change drier, pull vacuum, and recharge.
Check for loose wires in starting device
pg. 27
UCG GOURMET SERIES UNDERCOUNTER
Cubes too small
Freezing cycle too short
Review setting of DIP SWITCH
Cloudy cubes
Shortage of water
Accumulated impurities
See remedies for shortage of
Clean ice maker.
Shortage of water
Water spilling out through
Leak from water drain valve
Check or replace curtain.
Replace valve.
Irregular cube size and partially
Some jets plugged
Unit not level
Remove jet cover and clean.
Level as required.
Cubes too large
Freeze cycle too long
Review setting of DIP SWITCH keys.
Decreased ice capacity
Inefficient compressor
Replace.
Capillary tube partially restricted
Moisture in the system
Shortage of refrigerant
Dirty water supply
curtain
Water solenoid valve not opening
Water leak in sump area
Water flow control plugged
keys
Reclaim charge, evacuate, replace drier, and recharge with proper amount of refrigerant.
Same as above.
Check for leaks. Repair. Purge the system, change drier, pull vacuum, and recharge.
water.
Use water filter.
Replace valve.
Locate and repair.
Replace water inlet valve.
cloudy
Shortage of water
Leaky water valve
Non-condensable gas in system
Poor air circulation or excessive hot location (red-alarm LED glows)
See shortage of water.
Clean or Replace.
Purge the system, change drier, pull vacuum, and recharge.
Relocate the unit or provide for more ventilation.
pg. 28
UCG GOURMET SERIES UNDERCOUNTER
Overcharge of refrigerant
high
Reclaim charge, evacuate,
pressure.
Poor harvest
Restriction in incoming water
low
Check water valve strainer and
pressure.
Unit won’t harvest
Inoperative PC Board
opening
Replace PC Board.
Replace valve.
Incorrect discharge pressure
Inoperative condenser sensor
Inoperative PC Board
Replace sensor.
Replace PC Board.
Excessive water in unit base
Water tubing leaking
Check. Tighten or replace.
Capillary tube partially restricted
Hot gas solenoid valve leaking
Short of refrigerant
Discharge head pressure too
line
Water inlet valve not opening
Hot gas valve orifice restricted
Clogged air vented holes in mold cups
Discharge head pressure too
replace drier, and recharge with proper amount of refrigerant.
Reclaim charge, evacuate, replace drier, and recharge with proper amount of refrigerant.
Replace valve.
Charge to data plate indication.
See incorrect discharge
flow control. If necessary, enlarge the flow control orifice.
Valve coil with open winding. Replace valve.
Replace hot gas valve assembly.
Clean out holes plugged.
See incorrect discharge
Hot gas valve not opening
Water solenoid valve not
Valve coil with open winding. Replace valve.
Valve coil with open winding.
pg. 29
WIRING DIAGRAM
UCG GOURMET SERIES UNDERCOUNTER
pg. 30
UCG GOURMET SERIES UNDERCOUNTER
WARRANTY
Please visit www.iceomatic.com/warranty to register your unit and to get current warranty information. Refer to it for applicable coverage. In general warranty covers defects in material or workmanship. It does not cover maintenance, corrections to installations, or situations when the machine is operated in circumstances that exceed the limitations printed in this manual.
pg. 31
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