Global-Tek GT-CR1/EC Parts list manual

Global-Tek (Singapore) Pte Ltd
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Single-Tank Conveyor Type
Dish Washing Machine
Model - GT-CR1/EC
Instruction & Installation Manual
G-Tek

Global-Tek (Singapore) Pte Ltd
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CONTENTS
GENERAL……………………………..…………….. 3
Technical Data..…………………….………….……..
3
Standard Equipment……..………………..………… 3-6
INSTALLATION……………………..……………….
7
Unpacking……………………………………………..
7
Assembly………..……………………………….…… 7
Plumbing Connections……………..…………….…. 7
Drain Connections………………………..…….…… 7
Fill Connection……………………………..…..…….. 8
ELECTRICAL CONNECTIONS…..…….………… 9-10
OPERATION………….………………………………
11
Preparation………………………………..………….
11
Operating The Machine………..…………………… 11-12
CLEANING………….………………………………. 13
MAINTIANANCE……..….…………………………..
14
TROUBLESHOOTING……………………………...
15-17
CIRCUIT DIAGRAMS……………………………….
18-20

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Model : GT-CR-1/EC
GENERAL
GT-CR1/BU dishwasher is a fully automatic, rack-type single-tank conveyor
machine. It has a stainless tank and chamber with welded stainless steel angle frame,
stainless steel legs, and stainless steel adjustable feet. Front inspection door provide
ready access to the interior of the wash chambers. This machine has 4 x 9 Kw
booster heater, and is available with either steam or electric heat supply.
TECHNICAL DATA
Dimensions (W x D x H) : 1150 mm x 695 mm x 1640 mm
Maximum Capacity (racks/hour) : 225
Max height for washing : 450 mm
Tank heat : 7.5 Kw
Total power supply (Kw) : 38 Kw
Water consumption/hour (L) : 450 L
Water consumption/rack (L) : 2 L

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STANDARD EQUIPMENT
The control panel and booster are mounted on the top of the chamber. There are
three operational control switches housed in the control panel : POWER
(ON -OFF ); MOTOR (START -STOP );and TIMER
(MANUAL -AUTO ).
Mechanical thermostat for wash is located outside the tank, rinse thermostats are
located inside the control panel. Suggested temperature range for wash is 55-65℃,
and final rinse is 82-95℃.
Motor and Pump Units
The 2 horse power wash pump and motor are centrifugal-type cast stainless steel
with stainless steel impeller.
Motor is available in the following voltages:
Volts Hz Phase
380 50 3
The conveyor motor is a 0.22 Kw gear motor with the same voltage as the wash
pump motor with built-in overloaded protection system.
Clutch/Rack Transport Protection
The conveyor motor transfers power to the rack transport system through the clutch.
When the machine is overloaded or the racks jam the clutch sends a signal to stop
the conveyor motor to protect the machine, rack transport mechanism and motor.
Heater Protection
A float switch located in the wash tank automatically turns off the heat supply if the
water level is too low. Once the water returns to a required level, the heating circuit
becomes operational if heat is demanded.
An over-heat protector is also provided for electric heat. If overheating occurred, the
heat supply will be turned off . Turn the POWER switch OFF and contact your
authorized service office.

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Booster Protection
The booster water temperature is regulated by the thermostats to keep the rinse water
temperature between 82-95 ℃. Thermostats are preset at the factory and no
adjustment is needed. If necessary, contact your local authorized service office.
WARNING: The breaker is preset to “OFF” at the factory. Do not turn on the
breaker until all the tanks and boosters filled with water by activating the machine
auto fill. Only turn the breaker on after all tanks are filled, otherwise, the booster
tank & its heating elements will be damaged !!
Rinse Booster
Booster heater is equipped with 4 x 9 Kw heating elements.
Wash/Auto-timer Actuator and Rinse Actuator
Wash actuator, which is located at the entrance of the machine, works only when the
timer is turned to AUTO. When the rack enters into the machine, wash begins. When
timer is on MANUAL the switch does not function.
The rinse actuator is located at the exit of the machine. Rack contact with the rinse
actuator activates the final rinse.
Door Interlock
Door interlock switches will prevent machine operation while an inspection door is
open during machine is operating, the wash motor and conveyor motor will
automatically turn off. After the door is closed, the machine must be restart by
pushing the MOTOR switch to ON.
Wash/Rinse Arms
Wash and rinse arms are removable for daily cleaning purpose.

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Auto Fill
Close door and push the POWER switch to ON. The machine fills automatically
from two different areas, final rinse & fill valve. Water is heated in booster, and then
flows into wash tank. After the tank is filled with required level, fill will stop
automatically.
Auto Timer
The Auto Timer switch is located on the left hand side of the control box. Designed
to save electrical power, it is adjusted to shut off pump and drive motors and optional
exhaust vent fan control after the last rack exits the dishwasher. To restart, slide a
rack into the machine or push MOTOR switch to ON. To change the time setting,
contact your local authorized service office.
Front Panel
Stainless steel front panel conceals motors, pumps and plumbing.
Common Water Connection
A single water connection for Fill and Final Rinse is standard. Maximum feed
temperature to the machine is 65C with 15 - 20 psi incoming water pressure. Excess
water pressure or temperature will cause damage to booster heater tank.
INSTALLATION
UNPACKING
Immediately after unpacking the dishwasher, check it for possible shipping damage.
If this machine is found to be damaged after unpacking, save the packaging material
and contact the carrier within 3 days from date of delivery.
Prior to installation, verify that the electrical service agrees with the specifications on
the machine data plate, which refer to the operation and services manual

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After unpacking the dishwasher, remove the items shipped uninstalled (overflow
tube, pump intake strainer, curtains, and chamber hole plug kit) and instruction
manual inside the machine. Set the dishwasher in its proper location. Adjust the
height and level by turning the adjustable feet. NOTE: The dishwasher must be
positioned and leveled before making plumbing connections.
ASSEMBLY
Dish tables should be fitted into the dishwasher. Use Mastic between table and lip of
tank to prevent leakage. Rack track height should be from 4 mm to 6 mm above the
tank lip. Dish tables should be sloped so that any water carried from the dishwasher
will drain back into it.
PLUMBING CONNECTIONS
WARNING: PLUMBING CONNECTIONS MUST COMPLY WITH
APPLICABLE SANITARY, SAFETY, AND PLUMBING CODES.
The plumber who connects this machine is responsible for making certain that both
water and steam lines are THOROUGHLY FLUSHED OUT BEFORE connecting to
any manual valve or solenoid valve.
Manual valves or solenoid valves fouled by foreign matter, and any expenses
resulting from this fouling, are NOT the responsibility of the manufacturer.
DRAIN CONNECTION
Connect the drain through a trap to the sewer pipe.
FILL CONNECTION
Use pipe for the connecting line. The flowing pressure is preset 1.4kg/cm2. Water
flows into booster and is heated, then into wash tank. After the tank is filled, the
float-controlled high-water switch closes the solenoid valve. If during the operation
water level in wash tank is lower then the required water level, fill solenoid valve
will be opened to top-up the tank.

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WARNING: Do not operate the machine when flowing pressure is under 1.0 kg/cm2.
Low pressure may result in inadequate rinsing. The water fill connection must be
65℃ maximum and flow pressure should not exceed 16kg/cm2, otherwise, the
pressure regulator valve will be damaged. This regulator is preset at the factory and
no adjustment should be required.
ELECTRICAL CONNECTIONS
Power connection
Power connection is housed in the control box.
NOTE: Three power lines must connect to L1/L2/L3 of the junction line, and
neutral line connects to neutral line terminal block (neutral line is not required for
this machine). Earth line must be connected to the terminal block provided.
WARNING: PRIOR TO CONNECTION, VERIFY THAT THE ELECTRICAL
SERVECE AGREES WITH THE SPECIFICATIONS OF THE MACHINE, WHICH
IS REFER TO THE OPERATION AND SERVICES MANUAL, POWER LINE
MUST COMPLY WITH THE CURRENT ON THE MACHINE DATA.
WARNING: ELECTRICAL AND EARTH CONNECTION MUST COMPLY
WITH THE APPLICABLE PORTIONS OF THE NATIONAL ELECTRICAL
CODE ANSI/NFPA 70 (LATEST EDITION) AND/OR OTHER LOCAL
ELECTRICAL CODES.
WARNING: DISCONNECT ELECTRICAL POWER SUPPLY AND PLACE A
TAG AT THE DISCONNECT SWITCH TO INDICATE THAT YOU ARE
WORKING ON THE CIRCUIT.
Some machines may have more than one electrical power supply. All supplies must
be disconnected.
Motor(s)
Connect a permanent electrical power supply to the terminal block in the control box.
Three-phase motor rotate the impeller in the direction of the arrow found on the
pump housing of the motor pump unit, and the drive motor must rotate clockwise
when viewed from the output shaft end. Before placing the machine into service, a
check must be made to verify correct rotation. Only one motor needs to be checked
as the machine is wired at the time of manufacture so that all motors will rotate the
same direction.

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If the impeller does not rotate in the direction of the arrow, DISCONNECT POWER
SUPPLY to the machine and interchange any two power supply leads at the control
box terminal block. Or machine with a circuit breaker, reverse any two leads at the
incoming power supply block in the circuit breaker (three-phase only). Start the
machine momentarily and verify proper direction of rotation.
WARNING: Circuit breakers for booster heater have been switched off before
machine leaving factory to avoid dry operation of the booster elements. SWITCH
ON CIRCUIT ONLY AFTER THE FOLLOWING PROCEDURE. Position and
level the dishwasher; connect electrical power, water inlet and drain pipe. Turn on
the power switch; solenoid valve is activated to fill the machine. When the tanks are
full, Both circuit breakers for booster heater can be switched on now . Failure to
follow this procedure can result in machine manage.
OPERATION
PREPARATION
Put the dishwasher strainer pans and strainer basket into position in each tank. Put
the final rinse screen over the final rinse catch pan.
Hang curtains on open hooks provides to your machine. Be sure long & short
curtains are located correctly.
Close the drain valve at the bottom of the machine and close the door.
Turn POWER switch ON. The pump should be left OFF until the machine has
completely filled.
Recommended temperature for machine are :
Wash Tank Final Rinse
55-65℃ (130-1500F) 82-95℃(180-1980 F)
If the tank is accidentally drained before turning off the power switch, the
float-controlled low-water protector switch will automatically stop the tank heat.
When the proper water level is returned, the tank heat will be automatically started.
DO NOT use the low-water protection as a power ON-OFF switch. The heat MUST
be turned OFF at the POWER switch when the machine is not in use.

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Scatter the initial charge of detergent on the dishwasher strainer pans. Replenish as
needed. When an automatic detergent dispenser has been added (by private supplier),
follow supplier’s instructions.
Operating The Machine
After machine has filled, start pumps by pushing MOTOR switch to ON.
Stack dishes in the racks. Do not stack dishes one on top of each other, as water must
have free access to both sides of every dish. Stand plates and dishes up edgewise.
cups, glasses, and bowls should be inverted in open-type or compartment-type rack,
silverware and other small pieces may be scattered loosely over the bottom of a
flat-bottom rack.
When a rack has been loaded, slide it into the machine and start loading another. The
operation of the dishwasher is automatic. Each rack moves through the wash, and
rinse zones, then out onto the clean dish table. The rinse lever is activated by the dish
rack and automatically shuts off the final rinse water when no rack is in the rinse
zone.
Allow dishes to drain and air-dry before removing from rack.
An overload mechanism namely limit switch (located near the conveyor motor) is
provided that will shut off the conveyor drive motor should the racks jam or the load
becomes excessive. After the jam is cleared, push the MOTOR switch to NO to
restart the dishwasher.
CLEANING
1. Turn MOTOR and POWER switches OFF.
2. Open the door. Standard door interlock switches prevent machine operation with
inspection door open.
3. Open drain by turning drain valve.
4. Check the upper and lower final rinse nozzles, or auxiliary rinse nozzles (if so
equipped) to make sure they are free of lime and solids.
If the nozzles are clogged, open them by poking a straightened-out paper clip
into the opening. Unscrew and remove the rinse arm end cap and, with the splash
curtains in place and the machine door closed, run an empty rack through the
dishwasher as in normal operating procedure.
When the rack exits, open the machine door and replace the end cap.

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5. Remove wash arms. Thoroughly flush the wash arm in a sink and replace the
wash arm end caps(a twisting action helps ensure proper seating).
6. Clean off any scraps from machine walls.
7. Remove all strainer pans and strainer basket(s). Empty contents into garbage can
or disposer and thoroughly clean pans and basket(s).
8. Remove and clean pump intake strainer. Remove final rinse pan strainer. Clean
out pan and drain opening in pan bottom. Clean off strainer.
9. Remove curtains. Thoroughly scrub, rinse, and allow to dry at the end of each
day’s operation. See appropriate curtain for proper curtain installation.
10. THOROUGHLY wash out the interior of the machine with a high-pressure hose.
11. Place all strainer pans, strainer basket and pump intake strainer to original
locations.
12. Install upper wash arms. Rest the manifold on the rear hanger bracket with the
open end of the arm next to the wash pipe and rotate the arm upward to latch it.
13. Insert the lower wash arm at an angle between the conveyors and install the
retainer over the pin. Rotate the arm toward the catch and engage the hook into
the notch.
14. Leave door open and curtains removed while machine is not in use. This will
allow the interior to air out and dry.
MAINTENANCE
WARNING: DISCONNECT ELECTRICAL SUPPLY AND PLACE A TAG AT
THE DISCONNECT SWITCH TO INDICATE THAT YOU ARE WORKING ON
THE CIRCUIT BEFORE BEGINNING ANY MAINTENANCE PROCEDURE.
Some machines may have more than one electrical power supply. All supplies
MUST be disconnected.
WARNING: Disconnect Hi-Limit protector circuit when repairing booster. After
service completed, connect Hi-Limit protector until the machine has completely
filled. Failure to follow this procedure can result in damage to booster.
VENT
When cool, check the vent (if installed) of this dishwasher every six months for
obstructions.
MOTOR LUBRICATION
None required.

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TROUBLESHOOTING
NOTE: if symptom persists after possible causes have been checked, contact your
authorized service office.
SYMPTOM POSSIBLE CAUSES
No Machine Operation 1. Blow fuse or tripped circuit breaker at power supply.
2. Conveyor may be jammed.
3. If Auto Timer was used, the timer may have expired.
4. If table limit switch is used, the switch may be tripped.
5. Manual overload protector tripped on pump motors or
conveyor motor.
6. Make sure door is closed.
7. Door interlock switch may be damaged.
8. Contactor for rack transport requires service.
9. The clearance between clutch and sensor requires
adjustment. The clearance should be 2-4mm.
Dishes Not Clean 1. Insufficient wash water due to drain obstruction preventing
proper drain closing.
2. Drain valve allowing wash water to drain.
3. Missing end plug from wash arm.
4. Wash arm nozzle obstruction.
5. Water leaking past manifold “o” ring.
6. Loss of water pressure due to pump obstructions.
7. Incorrect water temperature. Check circuit breaker to electric
heat supply, or main steam valve. Make certain valve is
completely open.
8. Incorrect detergent dispensing. Contact your detergent
representative.
9. Loss of water in the tank. Check the connection between
overflow tube or steam valve.
Leaking Valve (Except
Solenoid Type) supplied
by Others.
1. Foreign material preventing proper valve operation. A
critical period is soon after installation when pipe compound
or metal shavings may lodge at the valve seat. Shut off
supply line. Unscrew and lift bonnet from valve body. Clean
valve and reassemble.
2. If problem is with a solenoid valve please contact your local
Global Tek-authorized service office.

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Inadequate Rinse 1. Dirty line strainer causing reduced water flow. Turn off water
supply, remove strainer cap, withdraw and clean screen.
Reassemble.
2. Low supply pipeline line pressure.
3. Clogged rinse nozzle(s).
Spotting of Silverware,
Glasses, and Dishes
1. Improperly loaded racks.
2. Incorrect final rinse water temperature 82 ℃(1800 F)
minimum.
3. Loss of water pressure due to pump obstruction.
DISCONNET ELECTRICAL POWER SUPPLY AND
PLACE A TAG AT THE DISCONNECT SWITCH TO
INDICATE YOU ARE WORKING ON THE CIRCUIT.
Drain tank(s) and check for any obstruction at the pump
intake.
4. Clogged wash arm nozzles.
5. Excessively hard water.
6. Incorrect detergent for water type.
7. Clogged rinse nozzle(s).
8. Misaligned rinse arms. Rinse arms should be positioned so
that the spray pattern is slightly toward the center of the
dishwasher.
NOTE: All machines may have alignment studs on the rinse
arms that correspond to studs on the rinse piping.
Continuous Rinse
Operation
1. Rinse actuator not moving freely.
DISCONNET ELECTRICAL POWER SUPPLY AND
PLACE A TAG AT THE DISCONNECT SWITCH TO
INDICATE YOU ARE WORKING ON THE CIRCUIT.
Check actuator for movement.
2. Check for foreign object in mechanism, i.e., silverware.
3. Rinse valve failed or jammed open. Contact your local
Global Tek-authorized service office.
No Wash Tank Heat or
Rinse Tank Heat
1. The machine is equipped with low water safety devices
which shut off heat if water level drops. Check for proper
water level.
2. Circuit breaker to heat system tripped.
3. Check heat float for debris and free movement.
4. Steam supply valve not open completely.
5. Over-temp protector tripped. Contact your local Global
Tek-authorized service office.

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No or Slow Fill 1.Dirty line strainer (not included in the machine) causing
reduced water flow. Turn off water supply, remove strainer cap,
withdraw and clean screen. Reassemble.
1. Make sure doors are closed.
2. Check interlock switch.
3. Check both upper and lower fill floats for debris and free
movement.
4. Problem with solenoid valve.
No Booster Heat or low
water temperature
1. Check the thermostat and temperature probe.
2. Check Hi-Limit protector.
3. Circuit breaker to heat system tripped.
4. Is contactor closed or coil damaged?
5. Heater failure
6. Check the water pressure regulator and water pressure.
Overheat temperature in
booster
1. Low water pressure.
2. Loss of water pressure due to pump filter in pump inlet pipe
and output pipe.
3. Clogged rinse nozzles.
4. Check the solid-state thermostat and probe.

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