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CMA-66 L.T.

CMA Dishmachines CMA-66 L.T., CMA-66 H.T. Installation & Operation Manual

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Table of Contents
CMA-66
1.1 CMA-66.......................................................................................................................................... 2
2.1. Introduction to CMA-66................................................................................................................. 3
2.2. Receiving and Installation.............................................................................................................. 4
2.3. Receiving and Installation (Old Models)........................................................................................ 5
2.3.1. Electrical ................................................................................................................................6
2.3.2. Plumbing................................................................................................................................. 6
2.3.3. Installation Notes.................................................................................................................... 6
2.3.4. Scrap Tray Assembly and Overflow Chute Installation.......................................................... 8
2.3.5. Pump Impeller Note................................................................................................................ 9
2.3.6. Optional Hood Adapter (set of two) ..................................................................................... 10
2.3.7. Optional Freestanding Scrap Trap and Adaptor Kit............................................................ 11
2.3.8. Field Installed Accessories................................................................................................... 12
2.3.8.1. Chemical Dispensers .................................................................................................... 12
2.3.8.2. Hood Fan Motor ........................................................................................................... 12
2.3.9. CMA-66 Heater .................................................................................................................... 12
2.4. Safety Tips for the CMA-66......................................................................................................... 13
3.1. Initial Setup .................................................................................................................................. 14
3.1.1. Auto Fill Timer/ Auto Re- Fill Timer.................................................................................... 14
3.1.2. Auto Fill Timer (Earlier Models with IDEC Timer Relay Socket)........................................ 14
3.1.3. Rinse Pressure Regulator..................................................................................................... 15
3.1.4. Wash Tank Temperature....................................................................................................... 15
3.2. Beginning Operation..................................................................................................................... 16
3.2.1. Chemical Dispensing............................................................................................................17
3.2.1.1. Low Temperature Applications.................................................................................... 17
3.3. Regular Service and Maintenance Checklist................................................................................ 18
3.4. Quick service guide...................................................................................................................... 20
3.5. Trouble Shooting.......................................................................................................................... 21
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1. Specifications
1.1 CMA-66
WATER CONSUMPTION
CMA-66
L.T.
CMA-66
H.T.
PER RACK .8 GAL. .94 GAL. PER HOUR 192 GAL. 192 GAL.
CONVEYOR SPEED
FEET PER MINUTE 6.75 5.7
OPERATING CAPACITY
RACKS PER HOUR (NSF rated) 242 205
OPERATING TEMPERATURE
WASH (MIN) 140° - 150° F 150° - 160° F FINAL RINSE (MIN) 140° - 150° F 180° - 195° F WATER REQUIREMENTS INLET TEMPERATURE (MIN) 140° F 180° F WATER INLET SIZE FINAL RINSE SIZE
3/4”
1/2” DRAIN SIZE 2” FINAL RINSE PRESSURE 20 PSI
HOLDING TANK CAPACITY PUMP CAPACITY
18.5 GAL.
(ALL PUMPS) 52 GPM (each) MOTORS WASH PUMP (3) 1 HP CONVEYOR 1/3 HP DIMENSIONS DEPTH 25-1/8” WIDTH 66” HEIGHT 55 ½”-56 ½” STANDARD TABLE HEIGHT 32 ½” adjusts to 34” MAX CLEARANCE FOR DISHES 19” STRANDARD RACKS 19 ¾” x 19 ¾”
ELECTRICAL RATING
HEATER
VOLTS PHASE AMPS
208 1 71 240 1 78 208 3 40 240 3 44
10 kW
SHIPPING WEIGHT
APPROXIMATE
MODEL CMA-66 Installation & Operation Manual Rev. 1.09 B Page
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Getting Started
2. Getting Started
2.1. Introduction to CMA-66
The CMA-66 is designed to give maximum cleaning in 66 inches. It represents the cleaning power of machines twice its length. The curtains incorporated in the machine minimize transfer from tank to tank during the wash and sanitizing procedures.
Energy costs for running the CMA-66 have been greatly reduced by the introduction of stage washing. This design allows the heavy food soil to be removed in the first station, which provides a relatively clean dish before it reaches the wash stage in the center tank.
The supply water to the CMA-66L must be a minimum of 140°F, while the CMA-66H requires two supply lines; one at a minimum water temperature of 180°F (for RINSE), and the other at a minimum temperature of 140° F (for FILL). Either model requires the supply water to be provided at 24-PSI (Pounds per Square Inch) minimum with 6 GPM (Gallons Per Minute) flow rate and 200 GPH (Gallons Per Hour) recovery rate. The pipe supplying the water must be 3/4”. The plumbing connection is located at the top back of the machine.
The CMA-66 features a scrap tray that may be emptied on a periodic basis without interruption of the flow of work and the manner in which the tank is filled ensures that the dishes are always rinsed with fresh water instead of re-circulated water. The CMA-66L is designed to deliver 0.8 gallons of fresh rinse water and the CMA-66H is designed to deliver 0.94 gallons of fresh rinse water for each rack. This water flows from the rinse and power wash tank into the pre-wash tank and then overflows into the scrap tray carrying debris with it, thereby providing a much cleaner environment for the wash and rinse cycles.
A single-phase CMA-66 is available for installations where the only power available is 208V­230V/1-PH.
There are also enhancements that can be chosen when desired such as an optional “Auto-Fill” function, optional Vent Hood Adaptors and other machine accessories such as stainless steel dishtables. Call (800) 854-6417 for more information.
This manual is structured to provide a complete reference guide to the CMA-66. It is presented in a manner that all users will be able to comprehend and use as an effective tool in supporting th e operation and maintenance of the dishmachine. The first section explains how the machine is packaged and what to look for when receiving the machine.
Instructions are provided in the manual explaining how to unpack the machine and then install and set up the machine for use. Requirements are given for plumbing, wiring, and space considerations. These attributes of the machine are always taken into consideration by our well- trained sales representatives prior to the order being placed. In the manual, additional installation guidance is given to ensure the machine can run at optimum conditions.
The
Operation Section of the manual may be used for instruction and procedures when required.
We make this portion of the manual easy to understand so that all levels of operators may be able to read and comprehend the operation of the machine. The function of the machine itself is mostly automatic and takes little training to put into full operation. The includes diagnostic considerations for the machine when problems occur.
We are committed to providing the best machines and customer service in the food industry and your feedback is welcome.
Operation Section also
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Getting Started
2.2. Receiving and Installation
When you receive your new CMA-66, complete the assembly by installing the scrap tray assembly with its overflow chute, the two wrapper shields and the curtain rods, which are shipped inside the machine. After the box has been removed from the machine, remove the left and right stainless steel wrapper shields and bolt them in place with the nuts and bolts provided. The wrapper shield with the extra curtain clamps mounts onto the dirty end of the machine. Next, mount the scrap tray assembly and overflow chute into position (see section
Assembly and Overflow Chute Installation).
All of the spray arms should be inserted and in place over the wash tank compartments. There are a total of seven curtains used in the CMA-66; two are long- narrow, two are short-
wide. The two long-narrow curtains have shorter rods than the other two curtains. The short rods hold the curtains at the entrance and exit of the machine.
The sketch below lists curtain positions 1 through 4.
2.3.4 Scrap Tray
CMA-66
34
12
56
LONG-NARROW
CURTAIN
SHORT-
WIDE
CURTAINS
LONG-NARROW
CURTAIN
DISH FLOW
DISHMACHINE FRONT VIEW
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Getting Started
2.3. Receiving and Installation (Old Models)
When you receive your new CMA-66, complete the assembly by installing the scrap tray assembly with its overflow chute, the two wrapper shields and the curtain rods, which are shipped inside the machine. After the box has been removed from the machine, remove the left and right stainless steel wrapper shields and bolt them in place with the nuts and bolts provided. The wrapper shield with the extra curtain clamps mounts onto the dirty end of the machine. Next, mount the scrap tray assembly and overflow chute into position (see section
Assembly and Overflow Chute Installation).
All of the spray arms should be inserted and in place over the wash tank compartments. There are a total of seven curtains used in the CMA-66; two are long-narrow, four are long-wide
and one is short. The two long-narrow curtains and the one short curtain have shorter rods than the other four (long-wide) curtains. The short rods hold the curtains at the entrance and exit of the machine.
The sketch below lists curtain positions 1 through 6. In this case, it represents a flow from left-to­right. Reverse the sequence for right-to-left machines. If the dish flow is from left-to-right, the proper sequence for the placement of the curtains would be: long-narrow curtain in the first position; short curtain in the second position; two short-wide curtains in the third position; two short-wide curtains in the fourth position; and a long-narrow curtain in the sixth position. The only curtain change to reverse the flow of dishes is the short curtain at position #2 is changed to position #5.
2.3.4 Scrap Tray
12
LONG-NARROW
CURTAIN
SHORT CURTAIN
CMA-66
34
56
SHORT-
WIDE
CURTAINS
LONG-NARROW
CURTAIN
DISH FLOW
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DISHMACHINE FRONT VIEW
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Getting Started
2.3.1. Electrical*
A 3-phase 208-240 volt AC, 60 Hz dedicated circuit should be used to supply electrical energy to the CMA-66 dishwasher (see specification sheet page 2). Connect the wire that has the highest voltage (stinger lead) to the main contactor’s power terminal L2. Power lead wires (L1, L2 and L3) used for the CMA-66 at installation must comply with all local and State electrical codes.
2.3.2. Plumbing*
The water supply connection is made with a ½” hot water line to the water supply inlet on the top of the machine. The water supplied to the machine must be a minimum of 140° F for the CMA­66L and a minimum of 180° F for the CMA-66H.
NOTE: The High Temp machine (CMA-66H) comes with two water supply line connections. One
is for the final rinse at 180° F and the other is to fill the machine—this water will be heated to the appropriate temperature by the wash tank heater. (See specification sheet on page 2).
There are two 2” drain connections to be made. One connection is made at either end of the horizontal drainpipe coming from the wash tank and the other connection is made at the scrap tray drain. (Instructions for installing the scrap tray assembly are provided in section
Tray Assembly and Overflow Chute Installation
.) One of the ends of the horizontal drainpipe has a cap on it – simply move the cap to the other end if it’s currently on the end needed for the drain connection.
2.3.3. Installation Notes
1. Tables must slant into the machine for proper drainage (for each 28" of table length a drop of at least ¾” in table height is recommended). See
Figure 2.3.3a.
2.3.4 Scrap
FRESH WATER
L
S
E
L
B
A
T
TO SCRAP
ACCUMULATOR
PREWASH WASH/RINSE
DISH FLOW
Figure 2.3.3a
See also installation instructions on new style CMA-66 conveyor (Section 4. Customer Notice)
2. The scrap tray assembly is placed inside the machine for shipping. Follow the instructions provided in section
Installation Figure 2.3.3b shows the different settings available on the conveyor cam.
3.
to properly attach the scrap tray assembly to the dishmachine.
2.3.4 Scrap Tray Assembly and Overflow Chute
*
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
T
N
A
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P/N 13505.10
(
)
)
)
205 RACKS (CMA-44H)
P/N 13505.12
205 RACKS (CMA-44H
Figure 2.3.3b
OLD Models
B
A
C
242 RACKS
167 RACKS (M-1
242 RACKS (CMA-44L
Getting Started
CMA-44L)
4. On a 3-phase machine the water pump motors are also 3-phase a nd, depending on which terminal 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 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.
5. The machine must be running to set the pressure regulator. While the machine is in the FINAL RINSE CYCLE, adjust the pressure regulator to 20 PSI. See section
3.1.3 Rinse Pressure Regulator for detailed instructions.
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2.3.4. Scrap Tray Assembly and Overflow Chute Installation
The scrap tray assembly and overflow chute, which came packaged inside the machine, can easily be installed by executing the following steps: illustrates the assembly as it would appear for a Left-to-Right machine – a Right-to­Left machine would simply be the mirror image.
Caution: For proper spacing, the
SS flat washer (item 2) must not be located between the head of the trusshead bolt and the inside of the machine.
Getting Started
Figure 2.3.4 below
Figure 2.2.4
ITEM
NO.
NO.
REQ’D
1 7 00905.00 ¼-20 X ½” Trusshead Bolt 6 4 00906.00 ¼-20 X ½” Hex Head Bolt 2 11 00924.00 ¼” SS Flat Washer 7 1 17579.00 Scrap Trap Holder 3 11 00912.00 ¼-20 Nylon Lock Nut 8 1 01579.10 Scrap Trap Body Molded 4 1 13511.26 CMA-66P Overflow Gasket 5 1 13511.06
P/N DESCRIPTION
CMA-66P Overflow Chute (L-R)
13511.16
CMA-66P Overflow Chute (R-L)
1. Remove the items from their packing and verify that all the pieces are present.
2. Attach the overflow chute with the five ¼-20 X ½” trusshead bolts, ¼” SS Flat Washers, and ¼-20 Nylon Lock Nuts provided.
3. Secure the scrap trap holder to the dishmachine using the four ¼-20 X ½” Hex Head Bolts, ¼” SS Flat Washers, and ¼-20 Nylon Lock Nuts provided.
4. Set the scrap trap body—with the scrap trap drawer inserted—into position on the scrap trap holder.
5. Attach the drain as specified in section
2.3.2 Plumbing.
ITEM
NO.
NO.
REQ’D
9 1 01579.20 Scrap Trap Drawer Molded
P/N DESCRIPTION
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Getting Started
2.3.5. Pump Impeller Note
Installation:
When installing the water pump impeller the Nylon Lock Nut indicated by the arrow
Figure 2.2.5 must be in place to prevent the impeller from spinning off of the shaft
in and damaging the motor.
Removal:
The Nylon Lock Nut indicated by the arrow in Figure 2.2.5 must be removed before attempting to remove the water pump impeller.
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Figure 2.2.5
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Vents
Measure
4” x 16”
Getting Started
2.3.6. Optional Hood Adapter (set of two)
An optional Hood Adapter set (P/N 13901.82) is available. The dimensions for proper installation are given below.
75-½"
9-½"
65"
Leg Adj
66”
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Getting Started
2.3.7. Optional Freestanding Scrap Trap and Adaptor Kit
The optional Freestanding Scrap Trap (P/N 01560.00) and Adaptor Kit (P/N
13512.00) are available for installations where the space is insufficient to accommodate the standard side-mounted scrap trap or where drain access is easier by locating the scrap trap some distance away from the Dishmachine.
*
ITEM
NO.
NO.
REQ’D
1 11 00912.00 1/4-20 Nylon Lock Nut 5 1 13511.26 Overflow Gasket 2 1 01307.00 Scrap Trap Flange Nut 6 2 00914.00 1/4-20 x 3/4" Hex Head Bolt 3 1 01308.00 Scrap Trap Flange Gasket 7 1 13512.00 Scrap Trap Adaptor 4 1 13512.10 Scrap Trap Adaptor Flange
P/N DESCRIPTION
ITEM
NO.
NO.
REQ’D
8 1 01560.00 Scrap Trap, Freestanding
DESCRIPTION
P/N
*Not Supplied
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Getting Started
2.3.8. Field Installed Accessories
Installation of the accessory chemical pumps must be performed by qualified personnel.
2.3.8.1. Chemical Dispensers
1. Checkvalves should be installed directly at the mixing chamber coupling. There are two 1/8” FPT mounting holes provided, which will position the checkvalves parallel to the machine avoiding any chemicals from dripping onto the stainless steel should a leak develop. Simply remove the plug from the mounting hole and install the checkvalve—be sure to use a proper sealing compound or Teflon tape on the threads
NOTE: There are two mounting holes provided on the mixing chamber coupling,
one for rinse chemical and one for sanitizer chemical, but only one is needed with the CMA-66H—for rinse chemical only.
2. Connect only to the primary side of the Listed Class 2 Transformer, 208-230 VAC, 60 Hz, 100 VA maximum load.
2.3.8.2. Hood Fan Motor
TERMINAL BLOCK
*
.
DETERGENT SIGNAL
220 volts AC
FAN CONTACTOR
T2
WIRES FROM THE POWER SOURCE *
* 220 VAC OR 110 VAC
SUPPLIED BY ELECTRICIAN
L2
WIRES TO THE FAN MOTO R
T1
L1
2.3.9. CMA-66 Heater
The 10kW heater located in the wash/final rinse tank has an independent power switch, which needs to be activated when the machine is ready for operation.
As a safety precaution—if the wash tank is drained while the heater is left on, the thermostat receives a signal to turn off the heater from a float switch located in the rinse end of the tank.
NOTE: The heater switch should always be turned off when the machine is not in operation.
* *
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
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Page 14
Getting Started
2.4. Safety Tips for the CMA-66
DANGER: Always turn off the circuit breaker at the wall when working on this
dishmachine. Even with the machine’s power switch off there is a live connection coming to the switch, so turn off the circuit breaker as well.
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 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 and/or under pressure.
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Operation
3. Operation
3.1. Initial Setup
3.1.1. Auto Fill Timer/ Auto Re- Fill Timer
Both timers for the CMA-44 are set at the factory, but may need to be adjusted at the time of installation depending on supply water pressure. When the power switch is activated, the machine should fill until water begins to overflow into the scrap tray, at which point it should be set to stop filling.
If necessary, adjust the timer block marked “Auto Fill Timer” to shut off when water is observed flowing into the scrap tray. This will set the proper wash and pre-wash tank water level.
After the Auto Fill Timer adjustment has been set the auto re-fill system must be set to fill the wash tank if there is the a loss in water. If water level were to drop to the level of the float switch located in the wash tank, the float switch will trigger the Auto Re-Fill timer and begin refilling the wash tank. This auto re-fill system will assure the water level stays at appropriate levels.
If necessary, adjust the Auto Re-Fill Timer by draining the wash tank manually (open drain valve) until float activates Auto Re-Fill timer. When the auto re-fill is activated, the machine should fill until water begins to overflow into the pre-wash tank, at which point it should be set to stop filling.
Note: Auto Fill/Auto Re-Fill can be adjusted by turning potentiometer with a small flat blade screwdriver. Since the range of this solid-state timer is from 6 seconds to 240 seconds, it is import ant to adjust timer in small increments.
Note: Every time power is interrupted and restored the Auto Fill Timer will reset and add an additional full charge of water. It assumes the machine has been drained, and is preparing for next wash cycle period.
3.1.2. Auto Fill Timer (Earlier Models with IDEC Timer Relay Socket)
When Auto Fill is activated, the machine should fill until it begins to overflow into the scrap tray, at which point it should stop filling.
1. If necessary, adjust the time set on the Auto Fill Timer to allow an appropriate amount of water flow to properly fill the Dishmachine. Plug the Timer Relay (P/N 13418.85) into the Timer Relay Socket (P/N 13419.85) and check that it is set up as follows:
a. Mode selected is “D” b. Scale displayed is “0 – 18” c. Range selected is “10S” d. Timer dial is set near 9 ½
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Operation
Note: If at any time less than a full Auto Fill cycle is desired with the IDEC brand timer, the Auto-Fill can be interrupted (stopped) by turning off the power to the machine. The machine will resume normal operation upon restoring power without continuing the Auto Fill cycle.
3.1.3. Rinse Pressure Regulator
The CMA-66 requires a supply water pressure of 24 PSI minimum. The pressure is then reduced by the supply water regulator. Use the following procedure to adjust the rinse pressure to 20 PSI:
1. Close the door on the machine.
2. Turn the Power switch to the "ON" position.
3. Using a rod or something long to avoid contact with the rinse water, actuate the final rinse trip switch—this activates the water solenoid. With the rinse water flowing adjust the pressure regulator until the gauge reads 20 PSI.
Adjustment tip: Always adjust “down” when setting this pressure regulator. In
other words—intentionally raise the pressure above the desired set point and then carefully bring it down to the correct pressure.
3.1.4. Wash Tank Temperature
The wash tank temperature for the CMA-66 is set at the factory. Should you ever find a need to adjust it—after replacement of the thermostat for example—simply perform steps 1 through 4 in section
3.2 Beginning Operation.
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3.2. Beginning Operation
To run the dishmachine, perform the following steps:
1. Close both drains (valve handles in vertical position).
CLOSE CLOSE
2. Turn on the power to the dishmachine.
Operation
3. Open the fill-valve and fill the machine until it overflows out of the pre-wash tank into the scrap tray or, if the Auto Fill option is present, press the AUTO FILL switch to fill the machine with water.
4. Turn the heater on. The temperature of the water in the tank should be 140°F – 150°F. The Tank heater will maintain a minimum temperature of 140° F if the final rinse is providing 140°F – 150°F at all times (CMA-66L). 150°F minimum will be maintained if the final rinse is 180°F – 195°F (CMA­66H).
If the thermostat (located behind the stainless steel cover on the final rinse side of the machine) should need adjustment—there is a thermosta t adjustment access hole located on the cover.
Tip: If you are having difficulty maintaining wash tank temperature, minimize
the vent hood openings by closing off the dampers.
5. Be sure to place the dishes correctly. If they become dislodged, they could interfere with the trip switch lever and interrupt the operation of the machine.
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RACK TRAVEL
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Operation
6. At the end of the shift and after heavy periods of accumulation, clean the three strainer trays inside the machine.
STRAINER TRAY
Also, at the end of each shift, remove and clean the six spray arms. Then reinstall them into the machine.
SPR AY AR M
Also, when water becomes heavily soiled, drain the tanks and refill the machine.
7. Check chemical buckets. Make sure there is an adequate supply of detergent, rinse aid and (CMA-66L only) sanitizer. Also, verify that the pickup line is inserted into the correct bucket.
8. Slide in a dish rack to activate the cycle start trip switch on the pre-wash end of the machine. The 60-second time-delay-off relay will hold the machine in the run mode for 60 seconds after a rack releases the cycle start switch and then shut off. This time-delay relay prevents the machine from continuing to run when a dish rack is not in the machine.
3.2.1. Chemical Dispensing
The rinse and sanitizing agents are not injected during the initial fill stage. They are injected into the final rinse make-up water when the final rinse trip switch is activated in the final rinse tank.
3.2.1.1. Low Temperature Applications
See dispenser manufacturing operational instructions for sanitizer adjustments for Low Temp applications.
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Operation
The sanitizing pump operates when the fresh water enters the machine during final rinse. The water is treated at 50 PPM (parts per million). The pressure regulator is adjusted to 20-PSI. This allows 0.8 (CMA-66L), or 0.94 (CMA-66H) gallons of water to enter the machine each time a rack is washed.
It is recommended that the 5-1/2% chemical solution be standardized to allow uniform dispensing of the sanitizing solution into the flow of rinse water as the machine operates. At this level, maximum shelf life is available.
Inside the control box is a labeled power block for the sanitizer and rinse aid, which is powered when the final rinse trip switch is activated. The detergent power block is also labeled and provides power when the conveyor and pump motors are operational.
3.3. Regular Service and Maintenance Checklist
1. Upon entering the facility, make a preliminary check of the flatware and glasses, especially the stemware. This will give you a quick indication of how the machine is functioning.
2. With the circuit breaker providing power to the machine turned off, open the door and check the interior condition of the machine.
a. The stainless steel on the inside of the machine should be clean and
shiny, no dull look or buildup of white lime scale.
b. Check the condition of the strainer trays for excessive garbage. The
machine operator should be cleaning the machine—explain proper cleaning procedures.
c. Open the drains and check to make sure they are all working properly.
3. Once the machine has drained, remove both end curtains and remove all the strainer trays from the machine.
a. Check all spray arms and jets - clean as necessary. Explain cleaning
procedures to the operators.
b. Check the drain openings making sure they are free and clear of
debris.
4. Close the drains, turn the power on and fill the machine.
a. Check the fill vacuum breaker for leaks. b. This is the time to check the water hardness. Check the water at the
fill while it is coming into the machine.
c. Using a rod or something long to avoid contact with the rinse water,
actuate the final rinse trip switch and observe the spray pattern on the final rinse jets. (It is easier to see while the pressure is lower.) If you have any clogged rinse jets, clean them using a paper clip or similar wire.
5. Verify that the heater is working. If the temperature is below 140° check the thermostat setting. Also, check that the heater contactor has activated (toggle the heater switch and listen for the contactor pulling in and dropping out). Check that the float switch is working properly (this will also cause the heater contactor to pull in and drop out when actuated).
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Operation
6. Replace all the strainer trays into their proper position and fill the machine.
7. Place a rack into the machine and observe the spray pattern of the pre-wash, the wash, and the final rinse.
a. Check the titration of the wash tank at this point. b. While the rack is in the final rinse, check for 50 PPM residual chlorine
in the final rinse.
c. Observe the final rinse vacuum breaker for leaks.
8. Run a stemware or glass rack through the machine and check the results on the glassware.
a. Observe the check valves for the rinse and sanitizer. Make sure they
are not leaking or building up chlorine crystals. If they are clean, leave them alone.
b. Check the condition of the chemical tubing from the peri-pump to the
check valves.
c. Check the peri-pump squeeze tubes to make sure they are tight,
pumping product properly and not leaking within the peri-pump. There should be no moisture within the peri-pump itself.
d. Observe the final rinse pressure at 20 PSI. Adjust if necessary.
9. Check the condition of the chemical tubing coming from the detergent rinse and sani buckets, up to the machine.
10. With the machine stopped, check the roller cam bearing on the conveyor. You should be able to move the outer cover of that roller cam bearing with your finger. Also, keep it well greased so that the outer covering does not freeze up.
11. Check the conveyor system. Make sure the complete system is running smoothly.
12. Send two or three racks through the machine. Check the scrap overflow. While the racks are running through the machine, look under the machine for any drips or leaks coming from the machine or pump seals.
13. Send a rack through the machine and check if the 60-second off delay is operating properly. If the relay is working properly the machine will shut off approximately 60 seconds after the cycle start trip switch is de-activated.
14. Send a rack through and check if the cycle start trip switch is operating properly. This trip switch is located on the pre-wash end of the machine and is activated by sliding a dish rack into the machine.
15. Using an all-purpose cleaner or stainless steel polish, clean up the outside of the machine to keep it looking nice.
16. Once this is done, fill out a service report and take it to the manager.
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Operation
3.4. Quick service guide
MODELS: CMA 44/66 CONVEYOR (S)
TECHNICAL ISSUE CAUSE SOLUTION
Manual/auto switch in
Continuously cycles
Conveyer timer faulty Replace timer, P/N 13418.85
Faulty tilt micro switch Replace micro switch, P/N 00411.00
Final rinse does not come on Micro switch cam out of adjustment Adjust cam
Faulty rinse solenoid valve Replace diaphragm or coil, P/N 00738.15
Power disrupted Check wall breaker switch
Faulty table limit switch Check and replace, P/N 13827.10
Does not run Faulty door reed switch Check and replace, P/N 00557.30
Burnt internal glass fuse Check and replace, P/N 13403.26
Faulty power shut off switch Check and replace, P/N 00421.83
Faulty main contactor Check and replace, P/N 13003.50
Machine is not level Level machine using leg adjustments Losing water Dishtable slants away from dishmachine,
Oil coming out of conveyor motor Conveyor cam bearing destroyed Wrong conveyor motor rotation Replace bearing, check and correct conveyor
Machine only runs in manual mode
Faulty manual/auto toggle switch
Faulty heater switch
Faulty heater thermostat
Heater does not work Faulty heater float switch
Faulty heater contactor
Faulty heater
Low or no pressure at final rinse arm
Clogged manifold system Check and clean
No pressure at wash arms Clogged spray jets Check and clean
Debris stuck in pump cover/damaged impeller Check and clean/replace impeller, P/N 03222.85
loosing water down quick- drain on table
Broken shaft seal in gear box Replace gear box, P/N 13504.00 OR .12
Faulty reed switch at the dishmacine entrance Check and replace, P/N 00557.56
Faulty conveyor timer
Not adjusted or faulty pressure regulator Adjust (20psi) or replace regulator, P/N 13602.45
Clogged rinse arm jets Clean rinse arm jets
Faulty water solenoid
Motor rotation, wrong direction See wiring instruction on motor for proper rotation
MANUAL mode
or faulty Turn switch to
Slant table to carry excess water towards machine tank/plumb quick-drain back to machine above water line
motor rotation, P/N 13507.50
Check and replace, P/N 13418.85
Check and replace, P/N 13003.70
Check and replace, P/N 00421.87
Check and replace, P/N 13417.85
Check and replace, P/N 13463.10
Check and replace, P/N 13003.50
Check and replace, P/N 13417.77
Check and replace solenoid, P/N 00738.15
AUTO
position or replace
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Operation
3.5. Trouble Shooting
PROBLEM LIKELY CAUSE SOLUTION
Pre-wash/power wash motor inoperative Machine inoperative
Machine runs continuously
Heater (no heat)
Racks stuck
Low wash tank temperature
Low rinse water pressure or no rinse
Chemicals
Machine loosing water
Low spray arm pressure
Bad motor or capacitor Faulty contactor
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 60 Sec. Timer Replace timer Defective 60 Sec. Timer or settings Replace timer or change settings Contactor stuck Replace contactor Float switch Check movement-replace it Defective thermostat or setting Replace thermostat or adjust Defective heater contactor Replace heater contactor Defective heater Replace heater Defective heater switch Replace switch Wire connections Check and correct Broken rack Replace rack Tray track alignment Adjust properly Low incoming water supply (150°F-low temp, 180 °F- high temp) Thermostat setting Adjust thermostat Vent hoods Close vents as much as possible Defective heater Replace heater Plugged rinse jets Remove and clean
Pressure regulator out of adjustment Adjust pressure regulator Water sol. valve coil or diaphragm Replace or clean Dirty rinse jets Remove and clean jets Defective rinse reed switch Replace reed switch Dispenser or settings Check dispenser troubleshooting guide Rinse pressure Set 20 psi. Quick drain on pre-wash end
Sheet pans Use CMA sheet pan rack Drain valves open Close completely Tank water level low Check rinse pressure, drain valve open
Clogged jets Clean jets Motors connected wrong
Replace defective motor Replace contactor
Check hot water supply
Plumb quick drain back into pre-wash tank above water line
Connect motors to reverse impeller direction
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Customer Notice
4. CMA-66 Customer Notice
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Customer Notice
TIPS TO SAVE A SERVICE CHARGE
If the Lessee of this equipment initiates a service call and it is subsequently determined that the problem does not relate to part failure or out of chemicals, there will be a minimum service charge for a service person to respond.
It is recommended that you check the following items before initiating a service call:
Circuit breaker position. Should be “ON”. Clogged drains (at any point in drain line). Lack of soft water (check salt level in brine tank). Lack of hot water due to valves shut off or incorrect thermostat settings. Failure of equipment unrelated to the machine. Abuse to equipment or failure to perform minimum cleaning requirements as outlined at
time of installation.
a. Rinse and wash arm tips clean and free of debris. b. Strainer trays clean and free of debris. c. Water tank drains clean and free of debris.
Trip switch blocked or held from free movement due to a lodged utensil or dish. Lines to chemical buckets found in wrong containers or empty. (Lines to the buckets are
color-coded.)
Lessee’s service responsibility shall be limited to its initial orientation, delivery of chemicals, adjustment of chemical injection system, and replacement of parts found to be worn or defective
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Electrical Diagrams
5. Electrical Diagram
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6. Electrical Diagram (Old Models)
Operation
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Operation
7. Electrical Diagram CMA-66 480/575/600 V
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