CMA Dishmachines H-1X User manual

High Temperature
Undercounter Dishwasher
Printed in the USA
Issue Date: Sept 23 2021
Manual P/N
For machines beginning with S/N W190688229 and above
Installation/Operation Manual
Model H-1X
High Temperature Wash and Drain
with built-in booster and Pumped
Final Rinse
CMA Dishmachines
12700 Knott Avenue
Garden Grove, CA 92841
Toll-free: 1 [phone]

PRODUCT REGISTRATION
ONLINE
Connect to the internet and enter the URL below to
register your machine.
https://cmadishmachines.com/warranty-registration/

COPYRIGHT © 2019 All rights reserved Printed in the USA
For future reference, record your dishwasher information in the box below.
Model Number__________________________ Serial Number_______________________
Voltage________________Hertz_____________ Phase__________________
Service Agent __________________________________ Tel:______________________
Parts Distributor _________________________________ Tel:______________________
ATTENTION:
The model no., serial no., voltage, Hz
and phase are needed to identify your
machine and to answer questions.
The machine data plate is located
on the lower front panel.
Please have this information ready
if you call for service assistance.
National Service Department
CMA Dishmachines
12700 Knott Avenue
Garden Grove, CA 92841
Toll-free: 1 [phone]
Fax: [phone]

i
Revision History
Revision Revised Serial Number Revision
Date Pages Eectivity Description
9.23.21 All W190688229 Released first edition
Revision History
Specifications are subject to change based on continual product improvement.

ii
Table of Contents
Revision History ................................................................................................................... i
Installation ................................................................................................ 1
Installation Codes ................................................................................................ 1
Receiving ............................................................................................................. 1
Placement ........................................................................................................... 1
Water Connection ............................................................................................... 2
Drain Connection ................................................................................................ 3
Electrical Connection .......................................................................................... 6
Booster Fill Procedure ....................................................................................... 10
Machine Start-up ..................................................................................................... 11
ChemicalDispensing Pumps .......................................................................................... 11
Priming the Chemical Dispensing Pumps .................................................................... 11
Operation ................................................................................................................ 13
Normal Wash Mode ...................................................................................................... 13
Loading Dish Racks ......................................................................................... 14
Operational Display .......................................................................................... 16
Start-up Sequence ............................................................................................ 16
Sump Fill Level ................................................................................................. 17
Wash Cycle ....................................................................................................... 17
Rinse Sentry ...................................................................................................... 18
AutoClean Drain .............................................................................................. 18
Cleaning ................................................................................................... 19
Cleaning the Wash Tank ................................................................................... 19
Cleaning the Spray Arms .................................................................................. 20
Cleaning Scrap Screen and Sump Strainer ....................................................... 21
Deliming ............................................................................................................ 22
Maintenance ............................................................................................ 23
Maintenance Schedules ...................................................................................... 23
Diagnostic Features ............................................................................................. 25
27
Electrical Schematic .................................................................................. 29
Timing Chart ..................................................................................................... 30
Parameter Settings Instruction Sheet ...............................................................
Table of Contents

iii
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1
Installation
RECEIVING
Counter-top
Wall
3" [8cm] Min.
34"
[86cm]
Min.
Floor
The installation of the dishwasher must comply with all local electrical, plumbing, health and
safety codes or in the absence of local codes, installed in accordance with the applicable
requirements in the National Electrical Code, NFPA 70, Canadian Electrical Code (CEC),
Part 1, CSA C22.1; and the Standard for Ventilation Control and Fire Protection of
Commercial Cooking Operations, NFPA 96.
INSTALLATION CODES
CAUTION: Be careful when moving the dishwasher to prevent damage.
• Inspect the shipping carton damage and report immediately.
• Inspect the shipment for accessories and items shipped with the machine.
• Compare the installation site utilities to ensure they are the correct size and location.
1. The dishwasher can be installed as a free-standing unit or under a counter-top.
The typical counter-top height in most locations is 34" [86cm].
2. It is highly recommended that the underside of the counter-top be clad in metal.
3. Under counter installations should provide storage space for the dishwasher chemical
supply containers. Do not elevate the containers above the finished floor.
4. Chemical supply containers should be placed as close to the machine as possible and
the chemical tubing taped to the back of the machine should be repositioned before
permanently placing the machine.
5. Place the dishwasher in its permanent location.
6. The dishwasher has 4 adjustable feet for leveling.
7. Level the dishwasher front-to-back and
side-to-side.
PLACEMENT
Fig. 1

2
Installation
1. All models have a 6 ft. flexible hot water fill hose with a 3/4" female garden hose connector.
2. A 1/2" or larger main incoming supply line must be installed to the dishwasher.
3. A 1/2" or larger shut-o valve should be installed in the main water supply, as close to the
dishwasher as possible for servicing.
4. A water hardness of 3 grains/gal (US) [5.3 mg/L] or less is recommended. Excessively hard
water will negatively impact wash results.
THIS Machine has a built-in flow control. The flowing incoming hot water supply
must be between 25-95 psi. The hot water supply must provide a minimum 140°F/66°C measured
at the dishwasher.
WATER CONNECTION
The installation of the dishwasher must be performed by a qualified service personnel
familiar with food service equipment. Problems due to improper installation are not covered
by the Limited Warranty.
The installation of the dishwasher must comply with all local electrical, plumbing, health and
safety codes or in the absence of local codes, installed in accordance with the applicable
requirements in the National Electrical Code, NFPA 70, Canadian Electrical Code (CEC),
Part 1, CSA C22.1; and the Standard for Ventilation Control and Fire Protection of
Commercial Cooking Operations, NFPA 96.
CAUTION: P lumbing connections must be made BEFORE the electrical connections.
Damage to water heaters will occur if the power is turned on without an adequate
water supply.
It is the installing plumber's responsibility to flush the incoming water line to remove
debris before connecting to the machine. Failure to do so will void the warranty.
NOTE:

3
Installation
DRAIN CONNECTION
! VERY IMPORTANT !
The dishwasher will not drain correctly if it is connected to a disposer.
THE DRAIN HOSE IS LOOPED
AND CLAMPED AND MUST
NOT BE CHANGED. ALTERING
THE DRAIN HOSE ROUTING
MAY RESULT IN THE MACHINE’S
INABILITY TO DRAIN OR MAY
CAUSE THE MACHINE TO
SIPHON THE WATER OUT OF
THE MACHINE.

4
DRAIN CONNECTION (continued)
Installation
DO NOT
• Do not remove the clamps holding the drain hose to the back of the machine.
• Do not connect the dishwasher to a disposer.
• Do not reduce the size of the drain hose connection or use a domestic drain fitting.
• Do not add additional length to the drain hose.
• Do not allow the drain hose to kink.
! ATTENTION !
Failure to follow the drain connection instructions may void the warranty.
1. Machine is equipped with a 6ft. [2m] 5/8" I.D. drain hose. The maximum drain height
connection must not exceed 3ft. [1m] and must be vented to prevent wash tank siphoning.
2. Drain hose is located at the rear of the machine and is secured by two clamps to maintain
the anti-siphoning loop in the drain hose.
3. A 3/4" hose barb fitting is strapped to the drain. The Hose Barb Fitting is P/N 0512321.
4. Additional parts are supplied by others.
5. The maximum drain flow is 15 US gpm/12.4 imp gpm, /60 lpm.
Fig. 2
3/4” drain hose barb
fitting is strapped to
drain hose.

5
WYE
Fitting
Drain
Adapter
Fitting
Clamp
3/4" NPT Hose Barb
Fitting
Drain Hose
(Supplied by others)
Building Drain Connection
1. Install the drain hose to an 1-1/2" or larger "WYE" fitting.
2. Building drain system must be properly vented.
3. Connection to a "TEE" fitting will prevent the dishwasher from draining completely
DO connect the flexible drain hose
to a vented "WYE" connection.
DO NOT
connect the flexible drain
hose to a TEE fitting.
Fig. 3
Installation
Indirect Drain Connection
1. A 1" (25.4mm) minimum air gap must be maintained between the outlet of the drain
hose and the flood-level rim of the floor drain, floor sink, or any other locally approved
drain receptacle (see Fig. 4).
Minimum
Air Gap
1” [25.4mm]
Floor
Dishwasher
Drain Hose
Floor Drain
! VERY IMPORTANT !
Drain problems are often due to improper installation of the drain hose and may not be
covered by the limited warranty.
Fig. 4

6
Installation
ELECTRICAL CONNECTION
The installation of the dishwasher must comply with all local electrical, plumbing, health and
safety codes or in the absence of local codes, installed in accordance with the applicable
requirements in the National Electrical Code, NFPA 70, Canadian Electrical Code (CEC),
Part 1, CSA C22.1; and the Standard for Ventilation Control and Fire Protection of
Commercial Cooking Operations, NFPA 96.
NOTE:
L1 L2
208-240V
VAC
GRD
SINGLE PHASE POWER CONNECTION
HOW TO CONNECT 1 PHASE POWER
! VE RY IMPO RTANT !
1. Check the data plate on the front of the
dishwasher for the phase of the machine.
2. Remove the lower access panel.
3. Pull power connection box forward out.
4. The Main Terminal Block has connections
for L1, L2 and Ground.
5. Connect ground, then connect
L1, L2 to 208-230 VAC.
7. Main Power connections are complete.
If the data plate says the machine is 1 Phase,
then connect a 1 PH power supply.
DO NOT CONNECT POWER TO L3.
THE ELECTRICAL POWER MUST BE A
2-WIRE PLUS GROUND SUPPLY.
Connect Power to the Main Terminal Block

7
Installation
ELECTRICAL CONNECTION
WARNING:
Electrocution may occur when working on energized circuits.
Disconnect power at main breaker or service disconnect switch; lock
out and tag to indicate work is being performed on the circuit.
Connect Power to the Main Terminal Block
! VERY IMPORTANT !
Provide a 3 feet/1 meter service loop in the power supply cable to service the machine.
! SINGLE PHASE POWER REQUIREMENT !
SINGLE PHASE H-1X
The electrical power must be a 2-wire plus ground supply, hard wired to
a dedicated, appropriately sized circuit breaker.

8
Installation
Lower Front
Dishwasher Panel
Main Terminal Block Cover
(A)
Fig. 5
Fig. 6
1. Remove the lower front dishwasher panel (Fig. 5).
2. Remove the retaining fastener (A) from the main terminal block (Fig. 6)
(continued on next page)
Connect Power to the Main Terminal Block
ELECTRICAL CONNECTION

9
Installation
3. Provide a 3 foot/1 meter service loop in the machine power supply cable.
4. Route the power cable from machine rear to terminal block making sure the cable
does not touch the booster tank.
5. Connect the power cable to the terminal block bracket using a suitable strain relief
connector.
6. Connect the power wires according to the wiring diagram on page 6.
Refer to Fig. 7 below:
Connect Power to the Main Terminal Block
ELECTRICAL CONNECTION
GROUND LUG STRAIN-RELIEF
KNOCKOUT
B
A
L1 L2
L1 L2
208/240V
G
208-240V/60Hz/1
TWO POWER WIRES PLUS
AN ADDITIIONAL WIRE MUST BE PROVIDED FOR
MACHINE GROUND.
CONNECT THE INCOMING
POWER AS SHOWN AT LEFT
THREAD THE POWER CABLE
THROUGH THE MIDDLE
SLOT IN THE DISHWASHER
REAR PANEL.
SECURE THE CABLE TO THE
TERMINAL BOX USING THE
PROPER STRAIN RELIEF.
A 30" / 76 cm SERVICE
LOOP MUST BE PROVIDED
BEHIND THE UNIT FOR
SERVICING.
STOP
STOP
A
B

10
Installation
BOOSTER FILL PROCEDURE
Fig.8
1. DO NOT TURN THE DISHWASHER POWER SWITCH ON
2. Turn the main water supply to the machine ON.
3. Turn the main breaker or disconnect power switch ON.
4. Press and hold the dishwasher green start switch for three seconds to activate the fill
solenoid.
5. Continue to hold the start switch until water enters the wash tank.
6. Release the green start button.
7. Booster pre-fill is complete.
Follow the instructions to fill the booster tank prior to washing dishes.

1. The dishwasher is equipped with a built-in detergent dispensing pump and rinse-aid
dispensing pump. (See the photographs below.)
2. The pumps are located on the lower panel behind the lower-front access panel.
3. Each pump is equipped with 6 feet [1.8 m] of pick-up supply tubing, a stiffener tube, and a
strainer.
4. A red label marked DETERGENT is attached to the detergent pump inlet tubing.
5. A blue label marked RINSE-AID is attached to the rinse-aid pump inlet tubing.
6.
wash compartment.
7. The detergent supply should be a non-chlorinated liquid detergent.
Initial Start-up
! ATTENTION !
Contact a local chemical supplier for detergent and rinse-aid chemicals. The detergent
should be a non-chlorinated liquid detergent. The chemical dispensing pumps are
adjusted by the chemical supplier.
Chemical Dispensing Pumps
The dispensing pumps are located behind the
front panel.
A stiffener tube, strainer and pick-up
tubing are supplied with the built-in
detergent and rinse-aid pumps.
Detergent Pump
Rinse-aid Pump
11

12
Priming the Chemical Dispensing Pumps
! VERY IMPORTANT !
The chemical dispensing pumps must be primed before operating the
dishwasher and whenever the container is changed.
Nexus Control Panel
1. The chemical dispensing pump supply lines must be primed
before the will pump properly.
2. Make sure the containers are full and the correct pick-up tubes
are in their containers.
3. Turn the dishwasher power switch ON. The switch illuminates
and the machine fills with water.
5. Open the dishwasher door, then push and hold the prime push
button, UP to the detergent position until detergent is
observed entering the wash compartment from the injection fitting
in the right rear of the tank. Release the button.
ON PRIME
Fig.10
Fig.11
Installation
! VERY IMPORTANT !
INSPECT AND REPLACE THE CHEMICAL DISPENSING PUMP
SQUEEZE TUBES EVERY SIX MONTHS.
Push and hold the prime push button DOWN to the R/A
(rinse-aid) position for thirty seconds until detergent is
observed entering the wash compartment from injection
fitting in the right rear of the tank. Release the push button
4.

13
Operation
1. Close the door dishwasher front door.
2. Push the Power Switch UP to turn on power.
3. The power switch will illuminate and the machine will fill with water.
4. Wait until the wash temperature indicates a minimum of 150°F/66°C.
PLACE AN EMPTY DISH RACK IN MACHINE AND RUN FIRST CYCLE EMPTY TO HEAT
WASH TANK INTERIOR .
5. Load the dish rack into the machine. Wash one dish rack at a time.
6. Close the door and press the green start button for 1 second. The green in-cycle light will
illuminate and the cycle will begin.
8 The final rinse cycle begins at the end of the wash cycle. The machine drains and refills with
fresh hot water. The final rinse must indicate a minimum of 180-195°F/82-92°C.
9. Open the door and remove the wares when the green cycle light goes out.
NORMAL WASH MODE
Control Panel
LCD
ON/OFF- DRAIN
POWER SWITCH
Prime
Push Button
Start
Push Button
In Cycle
LED Light
Wait
LED Light
! ATTENTION !
RINSE SENTRY MODE WILL EXTEND WASH CYCLE TIME
In the event the final rinse temperature has not reached 180-195°F/82-92°C. After the
wash cycle, the rinse sentry will extend the wash cycle time until the booster reaches
180-195°F/82-92°C. If the proper temperature is not reached within 5 minutes, the
machine will leave the rinse sentry mode and complete the cycle.

14
Operation
LOADING DISH RACKS
! VERY IMPORTANT !
DO NOT OVERLOAD THE DISH RACK.
LOAD ONE DISH RACK INTO THE MACHINE AT A TIME.
Prescrap and rinse wares before loading
into the machine.
Load plates and glasses in a peg rack.
1. Prescrap and rinse the wares before loading to remove large food particles.
2. Load soiled wares into the dish rack. Place plates and glasses in a peg rack. Place
cups and bowls in an optional flat bottom rack. Place utensils in a single layer in a flat-
bottom rack. Place pots and pans in a peg rack.
Do not overload the dish rack. Wash one dish rack at a time.
3. Slide one dish rack into the wash compartment making sure that wares do not
interfere with the rotating spray arms. Do not wash more than one dish rack at a time.