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EST-44 L-R
Installation Manual
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CMA Dish Machines EST-44 L-R Installation Manual

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Rev.2.04
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Table of Contents
EST-44
1. SPECIFICATIONS................................................................................................. 2
2. GETTING STARTED ............................................................................................ 3
2.2.1. Box Item List ........................................................................................................................... 4
2.2.2. Electrical ................................................................................................................................ 5
2.2.2.1. Control Box Components ............................................................................................... 6
2.2.3. Plumbing ................................................................................................................................. 7
2.2.4. Scrap Tray Assembly Installation ........................................................................................... 9
2.2.5. Conveyor Drive/ Rack Speed .................................................................................................10
2.2.6. Wash Pump Assembly and Impeller .......................................................................................11
2.2.7. Table Limit Switch Installation ..............................................................................................12
2.2.8. Optional Vent Hood Adapter’s Installation ................................................................ ...........13
2.2.9. Chemical Dispenser Connection ...........................................................................................14
2.2.10. Optional Exhaust Fan Control P/N 13578.00 ......................................................................14
2.2.11. (Optional) E-Temp Booster Heater .......................................................................................15
3. OPERATION ........................................................................................................ 17
4. ELECTRICAL DIAGRAM FOR 230V EST-44 ................................................ 22
5. ELECTRICAL DIAGRAM FOR E-TEMP HEATER ONLY ......................... 23
6. ELECTRICAL DIAGRAM FOR 480V EST-44 ................................................ 24
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1. Specifications
WATER CONSUMPTION
PER RACK (FINAL RINSE)
.46 GAL.
.46 GAL.
PER HOUR (FINAL RINSE)
114 GAL.
114 GAL.
CONVEYOR SPEED
FEET PER MINUTE
6.75
6.75
OPERATING CAPACITY
RACKS PER HOUR (NSF rated)
249
249
OPERATING TEMPERATURE
WASH RECOMMENDED
140° - 150° F
150° - 160° F
PUMPED RINSE RECOMMENDED
140° - 150° F
150° - 160° F
FINAL RINSE RECOMMENDED
140° - 150° F
180° - 195° F
WATER REQUIREMENTS
INLET TEMPERATURE (MIN)
140° F
180° F
WATER INLET SIZE
1/2”
FINAL RINSE SIZE
1/2”
DRAIN SIZE
2”
FINAL RINSE PRESSURE
20 PSI
HEATERS
WASH HEATER
13.3 KW/240V(1 phase) 13KW/208V(3 phase)
RINSE HEATER
3KW/240V, 2.25KW/208V
MOTORS
WASH PUMP
1 HP
RINSE PUMP
1/3 HP
CONVEYOR
1/8 HP
DIMENSIONS
DEPTH
25-1/8”
WIDTH
44”
HEIGHT
55 -1/2”-56-1/2”
STANDARD TABLE HEIGHT
32 ½” adjusts to 34”
MAX CLEARANCE FOR DISHES
19”
VENTILATION REQUIREMENTS CFM
600 Total, 400 at exit, 200 at entrance
STANDARD RACKS
19 ¾” x 19 ¾”
VOLTS
PHASE
AMPS
AMPS(Tall)
ELECTRICAL RATING 208
1
69
N/A
240
1
76
N/A
208
3
53
59
240
3
60
67
480
3
24
27
SHIPPING WEIGHT
662#
(300kg)
High temp
Low Temp
1.1. EST- 44
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
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Getting Started
3
1. Getting Started
1.1. Introduction to CMA Model EST -44
The EST is designed to give maximum cleaning in 44 inches. It represents the cleaning power of machines twice its length. The curtains incorporated in the dishwasher minimize the transfer of water from tank to tank during the wash and sanitizing procedures.
The energy costs for running the new EST-44 have been greatly reduced, by the introduction of our new Stage Washing Process. The EST-44 Conveyor dishwasher (EST is abbreviation for ENERGY STAR) lowers gallon/rack ratings and is directly related to CMA’s new Power-Rinse Stage that has been introduced. The EST-44 new Re-circulating Wash and new Power-Rinse Stage greatly reduce the amount of chemicals being used, thus adding a significant cost reduction and energy efficiency to its’ operation.
The EST-44 can be used as a high or low temperature dishwasher, with the new wash tank and power rinse tank designs, both having their own re-circulating pumps. The Power Rinse Stage provides a fresh cleansing rinse, before the dish rack advances into the Power Rinse and Fresh Water and Sanitizing Rinse Stages.
The initial-fill water and the final rinse water that is supplied to the EST-44 must be a minimum of 140°F, in low-temperature applications, while high-temperature machines will require two water lines; one at a minimum water temperature of 140°F to fill the dishwasher, and the second with a minimum of 180°F for the final rinse. With the introduction of the new optional E-Temp Booster Heater, it will be offered fully integrated to the dishwasher.
The EST-44 also features a stainless steel scrap accumulator tank and tray, which must be emptied on a periodic basis, as necessary. The EST machine is designed to deliver 0.49 gallons of fresh rinse water for each rack. This water flows from the rinse and power-rinse tanks into the wash tank, and then overflows into the scrap tray, carrying any debris that may have fallen into the wash tank, thereby providing a much cleaner environment for the washed and rinsed dishes. If preferred, there are also options such as a Corner Feed System, optional Vent Hood Adapters, Exhaust Fan Control Circuits and a Drain Tempering Kit. CMA also offers a full line of other machine accessories, including stainless steel dishtables. (See equipment catalog)
DISCLAIMERS CMA expressly disclaims any and all warranties, express or implied, relating to the installation of any and all CMA equipment that
is installed by chemical dealers, contracted servicers or third party servicers to CMA equipment. If the installation instructions are not followed exactly (to the letter), or, if any person or company conducting the installation of the CMA equipment, revise the installation procedures or alter the instructions in any manner, the CMA warranty becomes void. If, due to the improper installation of CMA equipment, this equipment ceases to operate properly or affects other parts of the CMA dishwashing equipment, in that the other parts become defective, the CMA warranty becomes void. CMA will not be liable or responsible or warrant CMA equipment, due to improper installation of any CMA model dishwasher.
CMA does NOT endorse “Tankless On-Demand” water heaters for use on CMA Dishmachine products. On most applications, the volume of hot water required for commercial dishmachines exceeds the capacity of these types of heating sources. You will find that most, if not all, commercial dishmachines have been programmed with auto-filling features that require quick filling, with a designated limited time.
CMA DOES endorse, and highly recommends, the standard “tank” style water heaters, sized properly to handle each particular facility with their water heating requirements. A “tank” style water heater stores and supplies a large capacity of preheated water before providing hot water to the dishmachine. To meet required health codes, there must be a reliable and consistent flow of
adequate hot water supplied to the dishmachine. If the facilities’ “tank” style water h eater is marginal in size, CMA recommends installing a proper size Hatco Booster Heater, a CMA’s E -Temp 40 or 70-degree-rise Booster Heater (that can be installed on CMA
Conveyors), or a CMA Temp-Sure Booster Heater (for door and undercounter dishmachines). All are designed to adequately achieve results.
Important: Make sure incoming power supply corresponds to the voltage listed on the data plate. If the voltage is too low (206V or less), the heating elements will not reach desired temperature specified by manufacturer, and performance will be compromised. The heating element needs to be sized according to the facilities available voltage, which must be noted on your purchase order to CMA for a special dishmachine. Special lower voltage higher kilowatt heaters are available upon request. Make sure a fused disconnect switch or circuit breaker (not supplied) is installed in the electrical service lines supplying this dishwasher and should meet the requirements of your local electrical code.
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 5
Getting Started
4
EST-44
1
2
3
EXTERIOR LONG CURTAIN
DISH FLOW
DISHMACHINE FRONT VIEW
INTERIOR
SHORT
CURTAIN
EXTERIOR LONG CURTAIN
1.2. Receiving and Installation
1.2.1. Box Item List
When you receive your new EST-44, prior to installation of the dishwasher, remove the box containing the all items needed for the installation. (See item list below)
Literature & Manuals  Instructional Operation Video  Scrap Tank Assembly, w/Mounting Bracket  Curtains Interior and Exterior, w/Rods  Exterior Wrapper Shields  Installation Hardware  Operation Wall Chart  Optional Vent Hood Adapters when ordered.
Start by first installing the Scrap Tray Assembly (see Scrap Tray Assembly, Section 2.2.4), along with the Overflow Chute, then the two wrapper shields and the exterior and interior curtains and rods, which are shipped inside the machine. All of the wash-arms are fully installed over the wash and power-rinse tanks. There are a total of three curtains used in the EST-44: two long-exterior curtains and one short-interior curtain, all with their own curtain rods. (See Figure 2.2-1, below)
Figure 2.2.1
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
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Getting Started
5
Main Power Knockout
1.2.2. Electrical*
The CMA Model EST-44 Conveyor can be ordered as Single-Phase or Three-Phase, using 208v to 240v. The machine must be connected to a dedicated circuit. (See Figure 2.2.2 below for amp draw). When installing a Three-Phase machine, check the voltage on all three incoming lines, and place the highest leg on the L2 terminal. (This is called a high-leg, stinger­leg, or Wild-leg.)
Prior to installation make sure the electrical supply is compatible with the specifications on the machines data plate. WARNING: Electrical and grounding connections must comply with the applicable portions of the National Electrical Code and/or other local electrical codes.
Note: For supply connections, use copper wire only rated at 90 degree C minimum. Warning: To prevent excessive overloads and component damages, it is essential for the
Dispenser Power Supply to be wired to the supplied Power Block on all conveyors. The CMA­supplied power block has been pre-wired to the wash heater contactor L1 and L3 terminals, to assure a correctly balanced power, as well as accurate surrounding components.
Only for dispensers requiring constant power, connect to L1 and L3 of main contactor; otherwise, use the Dispenser Power Block that has been provided.
Figure 2.2.2
On a 3-phase machine the water pump motors are also 3-phase and, depending on the terminal that each phase is connected to, the motor can rotate in either direction. Check the direction of rotation by removing the dust cap on the back of the motor. The motors must turn clockwise, when looking at the shaft from the back of each motor. To change the direction of rotation, switch any two power lead wires at the motor.
DANGER: ALWAYS TURN OFF THE DISHWASHER’S MAIN POWER SUPPLY BEFORE SERVICING THE DISHWASHER. ALTHOUGH THE MACHINE’S MAIN POWER SWITCH IS “OFF”, THE MAIN CONTACTOR LEADS WILL STILL HOLD VOLTAGE.
*
Electrical and plumbing connections must be made by a qualified person who will comply with all
available Federal, State, and Local Health, Electrical, Plumbing and Safety codes
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 7
6
1.2.2.1. Control Box Components
T
1
T2T
3
L1L
2
L
3
POWER
SWITCH
3 2
7
AUT
O
MANUA
L
GROUN
D
123
6
WASH HEATER
CONTACTOR
WASH TANK
PRE-RINSE
TANK
T1
T2
T3
OVERLOAD
RELAY
95
1
2
3
4
5
6
7
8
T
1
L
1
L
3
T
3
L
2
T
2
A
1
A
2
RINSE HEATER
CONTACTOR
T
1
T
2
L
1
L
2
L
3
T
3
1
A
A
2
RINSE PUMP CONTACTOR
T
1
L
1
L
3
T
3
L
2
T
2
A
1
A
2
WASH PUMP
CONTACTOR
T
1
T
2
L1L
2
L
3
T
3
1
A
A
2
T1
T2
T3
OVERLOAD
RELAY
95
CONVEYOR
CONTACTOR
MAI
N
CON
TAC
T
O
R
L
3
L
2
L
1
T
3
T2T
1
BOO
STER
H
EATER
CON
T
ACTOR
L
3
L
2
L
1
T
3
T
2
T
1
CHEMICAL DISPENSER
208-230V
9
10
11
14
16
17 18
19
12
13
15
1.
Main Contactor
11.
Detergent Terminals
2.
Wash Tank Heater Contactor
12.
Dispenser Power Supply Terminals
3.
Power Rinse Heater Contactor
13.
On-Off Power Switch
4.
Power Rinse Motor Contactor w/overload
14.
Auto/Manual Switch
5.
Wash Pump Contactor
15.
E-Temp Power Cable Knockout
6.
Conveyor Contactor w/overload
16.
Main Power Knockout
7.
E-Temp Heater Contactor (Optional)
17.
Wash Tank Float Terminals
8.
Conveyor Timer
18.
Power Rise Float Terminals
9.
Table Limit Switch Terminals
19.
Ground Terminal
10.
Sanitizer/Rinse Terminal Terminals
Getting Started
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
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Getting Started
7
Main water inlet valve connection ½”
Final rinse water inlet valve connection ½”
Pressure regulator
Vacuum Breaker
1.2.3. Plumbing*
Note: The required flowing water pressure to the dishwasher is 15-65 PSIG. If pressures higher
than 65 PSIG are present, a pressure regulating valve must be installed in the water line to the dishwasher (by others). If flowing pressure is lower than 15 psi, improper machine operation may result.
Notice to Plumber: The plumber connecting this machine is responsible for making certain that the water lines are THOROUGHLY FLUSHED OUT BEFORE connecting to the dishwasher.
Ask your municipal water supplier for details about your local water conditions prior to installation. Recommended water hardness is 3 grains per gallon or less.
Note: high iron levels in the water supply can cause staining and may require an iron filter. High chlorine levels in the water supply can cause pitting and may require a chloride removal system.
If an inspection of the dishwasher or booster heater reveals lime buildup after the equipment has been in service, water treatment is recommended. If water softener is already in place, ensure there is a sufficient level of salt.
The water supply connection is made with two ½” hot water lines; the valves are located at the top of the machine, behind the main control box. The water supplied to the machine must be a minimum of 140° F to the main fill valve and a minimum of 180° F to 195° F for a high temperature final rinse, with no more than 140° F for a lower temperature final rinse. (See Figure
2.2.3a below)
Figure 2.2.3a
To set the final rinse pressure, the final rinse must be running. Turn the adjustment screw clockwise to increase final rinse pressure; and counter-clockwise to decrease the pressure set the final rinse pressure to 20-psi ±5 psi. (Set to 22 - 23 psi for optimum running pressure)
*
Electrical and plumbing connections must be made by a qualified person who will comply with all
available Federal, State, and Local Health, Electrical, Plumbing and Safety codes
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 9
Getting Started
8
Scrap Tray
Main Drain & Scrap Drain Connection
Drain Stopper Cap
Main Drain Line from Wash & Power Rinse Tanks
There are two 2” drain openings off both ends of the dishwasher, however only one connection
is on the horizontal drainpipe. Place the 2” drain plug, supplied in the end of the pipe not being
connected to the drain line (See Figure 2.2.3.b below). Note: One of the ends of the horizontal drainpipe has a stopper cap on it – simply move the cap
to the other end, if it’s currently on the end needed for the drain connection.
The Scrap Tray Assembly is placed inside the machine for shipping. Follow the instructions provided in 2.2.4 Scrap Tray Assembly to properly install to the dishmachine.
Figure 2.2.3b
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
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Getting Started
9
1.2.4. Scrap Tray Assembly Installation
The Scrap Tray Assembly and Overflow Chute, which were shipped inside the machine, can easily be installed by executing the following steps: Figure 2.2.4 below illustrates the assembly, as it would appear for a Left-to-Right machine – (a Right-to-Left machine would simply be the mirror image).
Caution:
1. For proper spacing, the SS flat washer must not be located between the head of the truss
head bolt and the inside of the machine.
2. The Illustration below shows the correct placements of the scrap trap holder. Do not install upside down, otherwise water deflection takes place.
Figure 2.2.4
1. Remove items from their packaging and verify that all “installation hardware” was included.
2. Secure the scrap trap holder to the dishmachine by using the four ¼-20 X ½” Hex Head Bolts, the ¼” SS Flat Washers, and the ¼”-20 Nylon Lock Nuts that were provided.
3. Set the scrap trap body—with the scrap trap drawer inserted—into position on the scrap trap holder. (Attach the drain as specified in Section 2.2.3)
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 11
Getting Started
10
Conveyor Drive Cam
P/N 13505.14
243 RACKS/HOUR
205 RACKS/HOUR
Conveyor Cam Bearing
1.2.5. Conveyor Drive/ Rack Speed
The Conveyor Drive Cam below shows the two different conveyor drive cam speed settings; for standard 243 Racks/Hour and a slower 205 Racks/Hour (See Figure 2.2.5). By changing the Drive Cam Bearing location, the racks will travel through the machine slower.
Note: If the dishwasher is being used in a very heavy soil environment, changing the rack speed to 205 racks/hour will slow down the racks as they pass-through the dishwasher, allowing them to receive more chemical and water “contact time”.
Figure 2.2.5
Caution: DO NOT GET IN THE PATH OF THE CONVEYER DRIVE ASSEMBLY, ROCKER
ARM, OR CONVEYOR BAR, WHILE MACHINE IS IN OPERATION. DO NOT REACH INTO THE ROCKER ARM ASSEMBLY WITHOUT FIRST MAKING SURE THE DISHWASHER IS
TURNED “OFF” AT THE MAIN PANEL. EVEN WITH THE MACHINE’S POWER SWITCH
“OFF”, THE MAIN CONTACTOR LEADS WILL STILL CARRY VOLTAGE.
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 12
Getting Started
11
1.2.6. Wash Pump Assembly and Impeller
The standard wash pump motor is three-phase and can operate clockwise, as well as counter­clockwise; the Nylon Lock Nut used to hold the impeller in place (See Figure 2.2.6), is very important. When servicing the Wash Pump Assembly and replacing the seals, make sure it is secured properly; otherwise, if the motor turns the wrong direction, the impeller may spin-off the motor shaft causing damage to the impeller.
Note: ALWAYS CHECK THAT THE DIRECTION OF THE MOTOR ROTATION IS CLOCKWISE, WHEN REINSTALLING THE WASH PUMP. IF THE MOTOR IS TURNING COUNTER­CLOCKWISE, EXCHANGE L1 AND L3 WIRES ON MAIN CONTACTOR
Figure 2.2.6
Note: The Nylon Lock Nut indicated by the arrow in Figure 2.2.6 must be removed before
attempting to remove the water pump impeller.
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 13
Getting Started
12
1.2.7. Table Limit Switch Installation
The Model EST-44 is shipped with a Table Limit Switch fully wired and connected in the main control box, ready to be installed on the clean side of the dishtable. The Table Limit Switch MUST be installed to prevent dishrack and Conveyor Drive damage.
1. Remove the template that was shipped to hold the table-limit switch assembly
together.
2. Remove the activator bar (Figure 2.2.7a).
3. Position the template in the middle of the clean side of the dishtable.
4. Mark the end of the table, where the holes need to be drilled (Figure 2.2.7b).
5. Drill the holes.
6. Attach the Table Limit Switch, using the hardware supplied.
7. Reattach the activator bar removed earlier.
8. Test that it functions properly (Figure 2.2.7c).
Figure 2.2.7a Figure 2.2.7b
Note: This terminal is not actual size ,not to be used for installation!
Figure 2.2.7c
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 14
Getting Started
13
1.2.8. Optional Vent Hood Adapter’s Installation
CMA Vent Hood Adapters have been designed and engineered to draw only the steam that is released from underneath the curtains at the entrance and exit of the EST-44 conveyor dishwasher. This will allow the dishwasher to retain the heat within the machine, reducing the energy consumption of the dishwasher. To maintain proper CFM’s (600), and not evacuate the heat from the dishwasher tanks, CMA Vent Hood Adapters (PN # 13901.82) MUST be used.
Note: ON ALL PANT-LEG-STYLE VENT SYSTEMS, BY MODIFYING OR INSTALLING AN
UNAUTHORIZED BRAND OF VENT HOOD ADAPTER, IT WILL VOID THE CMA MANUFACTURERS’ WARRANTY.
Adjusting the internal baffles of the Vent Hood Adapters:
Once the vent hood adapters have been installed, completely close the internal baffle using two 7/16” wrenches. Run the dishwasher to create heavy steam buildup; start at the exit end of the dishwasher, open the baffle enough to draw the steam into the vent system. Then repeat the same process on the entrance side of the dishwasher.
Note: ONLY ONE OF THE TWO NUTS ON EACH BAFFLE IS USED TO TIGHTEN AND KEEP
THE INTERNAL BAFFLE FROM BEING REPOSITIONED.
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
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Getting Started
14
Sanitizer/Rinse Signal only
Detergent Signal only
Dispenser Power only
208 to 240 Volts
T1
T2
L1
L2
FAN CONTACTOR P/N 404.81
TERMINAL BLOCK
WIRES FROM THE POWER SOURCE *
WIRES TO THE FAN
* 220 VAC OR 110 VAC
SUPPLIED BY ELECTRICIAN
DETERGENT SIGNAL
1.2.9. Chemical Dispenser Connection*
The Model EST-44 will supply both the main power and the signals for the Detergent and Sanitizer/Rinse Aid. Connect the chemical dispenser main power leads, to the supplied power terminals. (See Figure 2.2.9) Connect the Detergent and Rinse Aid signal wires to the supplied signal terminals (See Figure
2.2.9)
Figure 2.2.9
Note: Sanitizer/Rinse and Detergent signals can draw more than 0.5 Amps.
Note: Use only commercial-grade detergents and rinse aids recommended by your chemical professional. Do not use detergents and rinse aids formulated for residential dishwashers. Low Temperatures chemical-sanitizing dishmachines must not exceed 6% sodium hypochlorite solution (bleach) as the sanitizing agent. Higher levels may damage stainless or components. Follow the directions precisely that are on the litmus paper vial and test the water on the surface of the bottom of the glasses.
1.2.10. Optional Exhaust Fan Control P/N 13578.00
First, when field-installing the Optional Exhaust Fan Control, locate the detergent signal terminals on the dispenser terminal block; mount the contactor, that was supplied with the kit, securely to the control box; connect the Blue and Brown wires, also supplied in the kit, to the detergent signal terminals; attach the power for the exhaust fans to the L1 and L2 incoming terminals of the contactor, and the T1 and T2 terminals, to the exhaust fan.
Note: Wires for exhaust fan to be supplied by electrician. (See Figure 2.2.10)
Figure 2.2.10
*
Electrical and plumbing connections must be made by a qualified person who will comply with all
available Federal, State, and Local Health, Electrical, Plumbing and Safety codes
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 16
Getting Started
15
1.2.11. (Optional) E-Temp Booster Heater*
The Optional E-Temp Booster Heater can only be ordered with a dishwasher, already installed at the factory; it cannot be installed in the field. The E-Temp Booster heater will be fully integrated into the EST-44 conveyors’ plumbing system. It will require its’ own power supply of 208 volts to 240 volts, in single-phase or three-phase. The unit can be specially ordered as a 480-volt unit, in three-phase only; temperature is available in a 40° rise or 70° rise. The E-Temp Booster heater contactor is located in the EST-44 Main Control Box (See item 7, page 6).
Note: E-Temp heater is shipped on the machine empty to prevent freezing. When machine is powered up for the first time, the booster heater must be filled by pressing and holding rinse switch to prevent heater damage.
Note: 70° degree rise E-temp Booster Heater is only available in Three-Phase.
*
Electrical and plumbing connections must be made by a qualified person who will comply with all
available Federal, State, and Local Health, Electrical, Plumbing and Safety codes
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
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16
1.3. EST-44 Safety Tips
DANGER:
Always turn off the main circuit breaker at the wall when installing or servicing this dishmachine and/or an E-Temp
Booster Heater. Even with the machine’s power switch “off”,
there is a live connection being carried to the switch from the dishmachine contactor.
CAUTION:
Do not get in the path of the Conveyor Rocker Arm or the
conveyor’s moving bar. Do not reach into the rocker arm area without first making sure the dishmachine is turned “off” at the
circuit breaker.
CAUTION:
Do not open the front door when the machine is in operation.
CAUTION:
Avoid spraying water on or around the electrical control box located on the top of the machine. When cleaning, do not spray water directly on the motors.
CAUTION:
When removing the Final Rinse Arms for cleaning, exercise caution. The Final Rinse Arms may be filled with chemicals or
have additional pressure applied.
Getting Started
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 18
17
Step 1.Close both drains at
the bottom of machine (see Fig.3.1 items 2,6 above)
Step 2.Turn on main power and machine will fill with water (see Fig.3.1 item1 above)
2. Operation
2.1. Beginning Operation
Operation
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Figure 3.1
Page 19
Operation
18
Wash
Tank
Power-Rinse
Tank
Final Rinse
Temp
150° F
Minimum
160° F
Minimum
180 °to 195° F
Step 3.Allow machine to come to temperature
Step 4.Rinse rack thoroughly
Step 5.Place rack in entrance
Step 6.Remove dishes from rack
Step 7.Place properly in rack
Step 8.Pre-soak flatware
Step 9.Wash flatware
Step 10.Place flatware in containers
with handles down; wash a second time
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
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19
See Fig.3.1, Items 2,6 See Fig.3.1, Items 4 See Fig.3.1, Items 5 See Fig.3.1, Items 3
2.2. Cleaning Instructions
Operation
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 21
Operation
20
Review installation section before beginning the installation of the Model EST-44 Conveyor Dishwasher. All installation procedures and guidelines MUST BE followed precisely.
2.3. Regular Service and Maintenance Checklist
Check all electrical connections, assuring they are tight and secure.
Check all Water, Drain, and Plumbing connections for leaks; tighten if needed.
Check Final Rinse Arms: the Rinse Jet Spray should be straight up & down.
Check Wash Pump motor rotation, making sure it is turning clockwise.
Check Dish rack Movement, Conveyor Arm & Bar, and Conveyor Dog Alignment.
Check Tray Track Guide and Rail & Table Alignment throughout dishwasher.
Check Timer Dipswitch Setting; only switch 6 should be in “on” position (32 seconds)
Check Wash-Tank Temperature 150° F Minimum.
Check Power-Rinse Tank Temperature 160° F Minimum.
Check Final-Rinse Temperature 180° to 195° F (High-Temp)
(140° F for Low Temp)
Check Final Rinse Pressure 20 psi, ±5 psi
Check Table-Limit Switch operation (If not installed, Warranty will be voided)
Check Vent Hood adapter baffle position to draw steam. (Optional)
(Keep baffles open to a minimum)
Check and make sure the dishwasher is level.
Check to make sure all curtains are in place.
Read all labeling and follow procedures.
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21
PROBLEM
LIKELY CAUSE
SOLUTION
Wash or power rinse motor not running
Bad motor or capacitor Faulty contactor
Replace defective motor or Replace contactor
Machine inoperative
Fuse is burned out
Replace fuse
Table limit switch
Remove dish rack at switch
Defective door reed switch
Replace reed switch
Defective start reed switch
Replace reed switch
Defective auto/manual switch
Replace switch
Defective Conveyor Timer
Replace timer
Machine runs continuously
Timer or settings@ 60 Sec
Replace timer or change settings
Contactor stuck
Replace contactor
Heater (no heat)
Float switch
Check movement-replace it
Defective thermostat or setting
Replace thermostat or adjust
Defective heater contactor
Replace heater contactor
Defective heater
Replace heater
Wire connections
Check and correct
Racks stuck
Old or broken rack
Replace rack
Tray track alignment
Adjust track to table properly
Wash & Power rinse tank temperature low
Incoming water supply (Low temp 120°F-Recommende140°F;
High temp 180°F minimum)
Check hot water supply
Thermostat setting
Adjust thermostat to mach NSF label
Vent hoods baffle setting
Set CMA Vent hood adapter baffles as instructed on page 13
Low final rinse pressure or no rinse pressure
Plugged rinse jets
Remove and clean
Pressure regulator out of adjustment
Adjust pressure regulator20psi to 23psi
Water sol. valve coil or diaphragm
Replace or clean
Dirty rinse jets
Remove and clean jets
Defective rinse reed switch
Replace reed switch
Machine using too much chemical
Quick drain on wash end
Plumb quick drain back into wash tank
Dispenser or settings
Check dispenser troubleshooting guide
Rinse pressure
Set 20 psi.
Soil
Check scrap basket sand float function
Machine loosing water
Quick drain on dirty side table
Check quick drain connections
Sheet pans
Use CMA sheet pan rack
Drain valves open
Close completely
Low wash arm pressure
Debris In wash & power rinse arm manifolds
Remove arm, check & clean debris from manifolds
Clogged jets
Clean jets
Motors connected wrong
Connect motors to reverse impeller direction
2.4. Trouble Shooting
Operation
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 23
Operation
22
T1
L1
L3
T3
T1
T2
L1
L2
L3
T3
PUMP
MOTOR
T1
T2
L1
L2
L3
T3
MAIN
CONTACTOR
T1
T2
T3
L1
L2
L3
L3
L2
L1
T3
T2
T1
1
1
A
2
A
A
2
CYCLE START
TRIP SWITCH
POWER
SWITCH
3
2
7
AUTO
MANUAL
FINAL RINSE
TRIP SWITCH
WATER
SOLENOID
VALVE
RINSE
WATER
SOLENOID
VALVE
DOOR
SAFETY
SWITCH
NOTE 1
NOTE 2, 3
NOTE 4,5
}
220V SIGNAL FOR USER SUPPLIED
FAN MOTOR CONTROL CONTACTOR
COIL.
3 AMP
SLOW BLOW
FUSE (x2)
GROUND
A
2
PUMP
MOTOR
A
A
T1
T2
L1
L2
L3
T3
1
CONV
MOTOR
TANK
HEATER
10kW
T1
T2
T3
OVERLOAD
.4A - .63A
95
1
2
3
6
RINSE
THERMOSTAT
TANK
HEATER
3 kW
L2
T2
A
1
A
2
WIRE DIAGRAM FOR MODEL: EST-44
(230 VAC three-phase, dual floats.)
11/19/2014
Rev. 2.05
WASH HEATER
CONTACTOR
RINSE HEATER
CONTACTOR
RINSE PUMP
CONTACTOR
WASH PUMP
CONTACTOR
CONVEYOR
CONTACTOR
CONVEYOR
TIMER
WASH
THERMOSTAT
WASH
TANK
PRE-RINSE
TANK
3:
CONNECT ONLY TO PRIMARY OF LISTED CLASS 2 TRANSFORMER 208-230V 60Hz MAXIMUM 100VA.
1:
TABLE LIMIT SWITCH CONNECTION PRE-WIRED AT FACTORY.
NOTES:
2:
SANI/RINSE. SIGNAL IS ON WHEN FINAL RINSE IS ACTIVE.
4:
DETERGENT FEEDER SIGNAL AND FAN MOTOR CONTROL CONTACTOR COIL.
6: DISPENSER POWER BLOCK 208-240 VOLTS
CHEMICAL
DISPENSER
208-230V
NOTE 6
5: COMBINED LOAD OF USER DEVICES (CHEMICAL PUMPS, FAN CONTROLS, ETC.) MUST NOT EXCEED 1 AMP.
T1
T2
T3
OVERLOAD
1.6A - 2.5A
95
3. Electrical Diagram For 230V EST-44
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 24
Operation
23
4. Electrical Diagram For E-Temp Heater Only
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
Page 25
Operation
24
T1
L1
L3
T3
T1
T2
L1
L2
L3
T3
PUMP
MOTOR
T1
T2
L1
L2
L3
T3
MAIN
CONTACTOR
T1
T2
T3
L1
L2
L3
L3
L2
L1
T3
T2
T1
1
1
A
2
A
A
2
CYCLE START
TRIP SWITCH
POWER
SWITCH
3
2
7
AUTO
MANUAL
FINAL RINSE
TRIP SWITCH
WATER
SOLENOID
VALVE
RINSE
WATER
SOLENOID
VALVE
DOOR
SAFETY
SWITCH
NOTE 1
NOTE 2, 3 & 5
NOTE 4, & 5
}
220V SIGNAL FOR USER SUPPLIED
FAN MOTOR CONTROL CONTACTOR
COIL.
GROUND
A
2
PUMP
MOTOR
A
A
T1
T2
L1
L2
L3
T3
1
CONV
MOTOR
TANK
HEATER
10kW
1
2
3
6
TANK
HEATER
3 kW
L2
T2
A
1
A
2
WIRE DIAGRAM FOR MODEL: EST-44
w/TRANSFORMER: 480/575/600, DUAL FLOATS.
11/19/2014
Rev. 2.01
3:
CONNECT ONLY TO PRIMARY OF LISTED CLASS 2 TRANSFORMER 208-230V 60Hz MAXIMUM 100VA.
1:
REMOVE JUMPER FOR OPTIONAL TABLE LIMIT SWITCH CONNECTION.
NOTES:
2:
SANI/RINSE. POWER IS ON WHEN FINAL RINSE IS ACTIVE.
4:
DETERGENT FEEDER CONNECTIONS AND SIGNAL FOR FAN MOTOR CONTROL CONTACTOR COIL.
5: COMBINED LOAD OF USER DEVICES (CHEMICAL PUMPS, FAN CONTROLS, ETC.) MUST NOT EXCEED 1.5 AMPS.
WASH HEATER
CONTACTOR
RINSE HEATER
CONTACTOR
RINSE PUMP
CONTACTOR
WASH PUMP
CONTACTOR
CONVEYOR
CONTACTOR
CONVEYOR
TIMER
TRANSFORMER
* AMP FUSE
SLOW BLOW
(x2)
1.25AMP
FUSE
SLOW BLOW
(2)
* 250 VA Transformer:
440 Volt application - 1.8 Amp
480 Volt application - 1.5 Amp
* 350 VA Transformer - 1.8 Amp
RINSE
THERMOSTAT
WASH
THERMOSTAT
WASH
TANK
PRE-RINSE
TANK
T1
T2
T3
OVERLOAD
.25A - .4A
95
T1
T2
T3
OVERLOAD
.63A - 1A
95
5. Electrical Diagram For 480V EST-44
MODEL EST-44 Installation and Operation Manual Rev. 2 .04 Page
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