Related Manuals for STERO SUnH
Summary of Contents for STERO SUnH
- Page 1 Installation and Operation Manual STERO™ Commercial Dishwasher SUnH ML-130381 SUnL ML-130382 F41340 Jan 2025 Ver1.0...
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Page 2: Nstallation Checklist
(see section 5.5) Electrical Hookup Completed (See section 5.6) o Voltage supplied to machine _______ V / 60 Hz / 1 Ph o Transformer connected for proper voltage (SUnH only) (see section 5.6.3) Water Hookup Completed (See section 5.7) ... -
Page 3: Table Of Contents
Connecting to the power supply ....................13 5.6.1 Electrical Data ........................14 5.6.2 Electrical Connection Method .................... 14 5.6.3 Transformer connections (SUnH Only) ................16 Connecting the water ......................... 17 5.7.1 Water Requirements ......................17 Page 3 of 52 Ver1.0... - Page 4 STERO™ Installation and Operation Manual 5.7.2 Water Connection ....................... 17 Connecting the drain ........................18 5.8.1 Attaching drain hose to machine ..................19 5.8.2 Attaching drain hose to building drain ................19 Chemical Supply Set Up ........................20 Personnel qualification ....................... 20 Preparing the chemical supply tubing ..................
- Page 5 8.7.2 Priming sanitizer dispensing pump ..................42 8.7.3 Inspecting sanitizer supply ....................43 Temperature units and language display ..................44 Chemical Pump Control (SUnH Only) ..................45 8.10 Aux Channels ..........................46 8.11 Software Version / Machine Program ..................46 Display of errors and information .......................
- Page 6 STERO™ Installation and Operation Manual F41340 (January 2025) Ver1.0 Page 6 of 52...
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Page 7: Notes On The Documentation
▶ Keep the operating instructions and all referenced documents in a safe and accessible place. This Installation and Operations manual is subject to change. For the most up to date manual visit www.stero.com/product-manuals. 1.2 Layout of the documentation Referenced documents are all instructions that describe the installation, operation, maintenance, and repair of the device, as well as additional instructions for all accessories used. -
Page 8: Representation In The Text
STERO™ Installation and Operation Manual 1.3.2 Representation in the text Representation Meaning Important information on machine operation, not a warning notice NOTE Step Outcome/result − Listing 1 level • Listing 2 level AFETY INSTRUCTIONS AND REGULATIONS 2.1 Safety instructions and warning notices ... -
Page 9: Personnel Qualification
STERO™ Installation and Operation Manual 2.2.2 Personnel qualification Observe the regulations on occupational health and safety. Carefully read through the operation manual before use. Activity Qualification/training Installation/Setup Qualified electrician and plumber Work on the electrical system Qualified electrician... -
Page 10: Product Description
The rating label is located on the right side of the machine. If you have any questions regarding service and parts, use the serial number in all communications. 3.3 Technical specifications Model SUnH SUnL 32.375 x 23.375 x 24.000 in 32.375 x 23.375 x 24.000 in Dimensions (H x W x D) 822.3 x 593.7 x 609.6 mm... -
Page 11: Controls (See Operations Section 6.6)
STERO™ Installation and Operation Manual 6.6) ONTROLS PERATIONS SECTION Power/Drain Button Pressing this button switches the machine on, fills and heats the wash tank. Pressing and holding (3 seconds) activates self-cleaning cycle, drains machine, and then switches the machine off automatically. -
Page 12: Transporting To The Installation Location
STERO™ Installation and Operation Manual NOTICE! Frost damage Temperatures below 32°F (0°C) during transport/storage cause function impairments. Prior to installation, store machine at room temperature (min. 60°F) for 24 hours. 5.3 Transporting to the installation location Where possible transport packed on the pallet. -
Page 13: Installing The Machine
STERO™ Installation and Operation Manual 5.5 Installing the machine Prior to installation, verify that the electrical supply agrees with the specifications on the machine data label, which is located on the lower, right side of the machine. Wall clearance is not required. -
Page 14: Electrical Data
Model Volts/Hertz/Phase Circuit Conductor Protective Device Ampacity Ampacity Ampacity 208/60/1 24.2 SUnH 240/60/1 27.5 SUnL 120/60/1 17.5 Refer to the data label on the lower, right side of the machine for proper selection. 5.6.2 Electrical Connection Method Remove the lower front panel by removing the two screws at the bottom of the panel. - Page 15 STERO™ Installation and Operation Manual Lower control board bracket and chemical pump bracket to allow access to terminal block 1TB. A hole for 1” trade size conduit is supplied at the lower left in the back of the machine.
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Page 16: Transformer Connections (Sunh Only)
5.6.3 Transformer connections (SUnH Only) NOTICE! Transformer connections (SUnH Only) For the SUnH machine a control transformer is used to step the 208V or 240V incoming power to 120V for the control circuitry and drain pump. The transformer is factory- preset to 240V. -
Page 17: Connecting The Water
STERO™ Installation and Operation Manual 5.7 Connecting the water NOTE: The machine must be operated with potable water. 5.7.1 Water Requirements Proper water quality can improve ware washing performance by reducing spotting, enhancing effectiveness of labor and extending equipment life. Water conditions vary from one location to another. -
Page 18: Connecting The Drain
STERO™ Installation and Operation Manual Connect to hot water A water supply hose is provided. Temperature: – SUnH: 110°F (43°C) minimum – SUnL: 120°F (49°C) minimum Water hardness: max. 3 grains Flowing pressure: – 15 psi – 65 psi (1 bar – 4.5 bar) –... -
Page 19: Attaching Drain Hose To Machine
STERO™ Installation and Operation Manual 5.8.1 Attaching drain hose to machine Attaching drain hose to machine Remove 8 screws holding rear cover panel to machine. Attach the supplied drain hose to the drain elbow with the supplied hose clamp. -
Page 20: Chemical Supply Set Up
STERO™ Installation and Operation Manual NOTICE! Drain connection An improper drain connection or a kinked hose could result in reduced machine performance and errors. An air gap connection is the preferred connection method. Incorrect Acceptable Preferred (Meets Code Requirements) HEMICAL UPPLY 6.1 Personnel qualification... -
Page 21: Preparing Detergent And Rinse Aid Chemical Level Sensors
STERO™ Installation and Operation Manual 6.3 Preparing detergent and rinse aid chemical level sensors 6.3.1 Attaching chemical level sensors to the chemical tubing Refer also to instructions supplied with the detergent and rinse aid chemical level sensors. Locate the detergent and rinse aid chemical level sensors that were packaged with the machine. -
Page 22: Preparing Sanitizer Chemical Level Sensor (Sunl Only)
STERO™ Installation and Operation Manual 6.4 Preparing sanitizer chemical level sensor (SUnL only) 6.4.1 Attaching the sanitizer chemical level sensor to the sanitizer tubing Refer also to instructions supplied with the sanitizer chemical level sensor. Locate the sanitizer chemical level sensor that was packaged with the SUnL machine. -
Page 23: Setup Of External Chemical Bottles
STERO™ Installation and Operation Manual 6.5 Setup of external chemical bottles 6.5.1 Preparing the detergent and rinse aid Detergent and rinse aid chemical level sensors Suction height of detergent and rinse aid pumps: max. 5 ft Place the chemical level sensing wand into the external bottle or bucket so that the float end of the sensor touches the bottom of the container. -
Page 24: Filling Chemical Tubing (See Operator Menu For Priming - Section 8.1)
Recommended water hardness is 3 grains of hardness per gallon or less. Higher hardness may cause excessive formation of lime scale. Water hardness above 3 grains per gallon requires water treatment. If you have any questions, please contact your authorized STERO service provider. F41340 (January 2025) Ver1.0... -
Page 25: Preparation For Washing
STERO™ Installation and Operation Manual 7.4 Preparation for washing 7.4.1 Preparing the machine Check for correct position of pump strainer and tank strainers and proper installation of upper and lower wash/rinse arms. Open building water shut-off valve. ... -
Page 26: Preparing The Ware For Washing
STERO™ Installation and Operation Manual 7.4.2 Preparing the ware for washing Remove heavy food residue. Load ware into rack. Rinse off ware. 7.5 Washing Open door. Slide rack into the machine and close the door. -
Page 27: Extending Wash Time
STERO™ Installation and Operation Manual As soon as the Start button LED lights up permanently, the rinsing process is complete, and the cycle ends. Open the door and remove the rack. Allow the ware enough time to dry. -
Page 28: Exiting The Idle Energy Mode
STERO™ Installation and Operation Manual 7.6.1 Exiting the Idle Energy Mode To exit the idle energy mode, start a wash cycle by pressing the Start button. If needed, the machine will first heat up both the booster and tank sump. While heating the temperature display will show “HEA”. -
Page 29: Daily Cleaning Or After Each Meal Period
STERO™ Installation and Operation Manual 7.9 Daily cleaning or after each meal period NOTICE! Property damage The use of unsuitable agents can cause corrosion damage. Do not use any bleach, acids, or metal-containing additives to clean the machine. ... -
Page 30: Removing Hard Water Deposits (Deliming)
7.11.1 Delime notification The SUnH and SUnL machines are equipped with an automatic delime cycle reminder. It is recommended that deliming be done when the Delime button LED is flashing. Deliming can also be initiated at any other time if deemed necessary. - Page 31 STERO™ Installation and Operation Manual Press and hold the Delime button (minimum 3 seconds). The temperature display will show “SdL” to show that the delime cycle has started. The information display will show the approximate countdown (in minutes) until deliming agent needs to be added.
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Page 32: Settings
The information display will show the approximate countdown (in minutes) until the deliming process is completed. After the deliming process is completed, the machine will drain and shut down. ETTINGS 8.1 Overview of operator menu SUnH (High Temperature Sanitizing Machine) Item Menu Function Function Extended Wash Time Sets extended wash time... -
Page 33: Opening The Operator Menu
STERO™ Installation and Operation Manual SUnL (Chemical Sanitizing Machine) Item Menu Function Function Extended Wash Time Sets extended wash time Cycle Count (Rinse) Displays number of wash/rinse cycles completed Detergent Setpoint Setting of detergent concentration (g/l) Detergent Pump Prime Primes detergent pump... -
Page 34: Extended Wash Time
STERO™ Installation and Operation Manual 8.3 Extended wash time Information display shows “00” Temperature display shows current extended wash setting (in minutes): (default = 4) Extended Wash setting can be set from 3 minutes to 6 minutes total wash time in 1-minute intervals. -
Page 35: Cycle Count
STERO™ Installation and Operation Manual 8.4 Cycle count Information display shows “01” Press the Menu button to display the cycle count Temperature display shows the first 3 digits of the 6-digit cycle count number (ex. 012345) 012345 ... -
Page 36: Detergent Dispensing
STERO™ Installation and Operation Manual 8.5 Detergent dispensing 8.5.1 Setting detergent dispensing amount Information display shows “02” Temperature display shows current detergent dispensing settings in g/L: (default = 2.0 g/L) Note: 1.0 g/L ≈ 0.1 % concentration (by vol.) Detergent dispensing amount can be set from 0.0 g/L to 9.5 g/L in 0.1 g/L increments. - Page 37 STERO™ Installation and Operation Manual Press the Menu button to change temperature display value to “1” Press delime button to begin detergent dispensing pump priming The detergent dispensing pump will activate for 60 seconds The decimal point in the temperature display will flash while the dispensing pump is on ...
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Page 38: Inspecting Detergent Supply
STERO™ Installation and Operation Manual 8.5.3 Inspecting detergent supply Inspect detergent container for chemical present. Make sure the bottle level sensor is correctly inserted into container with float sensor at bottom of container. If air bubbles (large gaps) are present in detergent line – prime (refer to 8.5.2) -
Page 39: Priming Rinse Aid Dispensing Pump
STERO™ Installation and Operation Manual To save and exit, either: Press Start Button to move to next item – Or – Open and close door (Will also exit operator menu) 8.6.2 Priming rinse aid dispensing pump Information display shows “05”... -
Page 40: Inspecting Rinse Aid Supply
STERO™ Installation and Operation Manual Verify the rinse aid is moving from the detergent bottle or container to the machine through the tubing and there are no air bubbles in the tubing. Note: The priming process might need to be repeated at least 2 times to fully prime the machine. -
Page 41: Sanitizer Dispensing (Sunl Machine Only)
STERO™ Installation and Operation Manual 8.7 Sanitizer dispensing (SUnL machine only) 8.7.1 Setting sanitizer dispensing amount Information display shows “06” Temperature display shows current sanitizer dispensing setting in % concentration: (default = 50%) Sanitizer concentration dispensing amount can be set from 20% to 100% in 10% increments. -
Page 42: Priming Sanitizer Dispensing Pump
STERO™ Installation and Operation Manual To save and exit, either: Press Start Button to move to next item – Or – Open and close door (Will also exit operator menu) 8.7.2 Priming sanitizer dispensing pump WARNING! Chemical mixing Deliming solution must not come in contact with bleach. Mixing may cause hazardous gas to form. -
Page 43: Inspecting Sanitizer Supply
STERO™ Installation and Operation Manual Press delime button to begin sanitizer dispensing pump priming The sanitizer dispensing pump will activate for 140 seconds The decimal point in the temperature display will flash while the dispensing pump is on. -
Page 44: Temperature Units And Language Display
STERO™ Installation and Operation Manual 8.8 Temperature units and language display Information display shows “08” Temperature display shows current temperature units and language display. Press the Menu button or the Delime button to change temperature units and language display ... -
Page 45: Chemical Pump Control (Sunh Only)
STERO™ Installation and Operation Manual 8.9 Chemical Pump Control (SUnH Only) Information display shows “09” Temperature display shows current chemical pump control setting. Chemical pump control can be set to 0 or 1. Setting Chemical Pump Control Configuration... -
Page 46: Aux Channels
STERO™ Installation and Operation Manual 8.10 Aux Channels – Reserved for Internal Functions – 8.11 Software Version / Machine Program Information display shows “13” Temperature display shows the current software version. The first two digits show the major version. -
Page 47: Display Of Errors And Information
Booster Pressure Level Sensor 2. Drain tank and refill (should reset the pressure level sensors). Voltage below lower limit 3. If error continues to display – contact STERO service provider. Wash Tank Pressure Level Sensor Voltage above upper limit Page 47 of 52 Ver1.0... - Page 48 Wash Tank Fill Time Exceeded 2. Check wash and rinse arms for clogged nozzles. 3. If error continues to display – contact STERO service provider. 1. Verify drain hose is not pinched, kinked or incorrect drain Drain Error – Shutdown connection to building drain.
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Page 49: Information
4. If error continues to display, possible tripped high limit or heating element malfunction – contact STERO service provider. 1. System exceeded maximum fill time. 2. Press the power button to power off machine. -
Page 50: Other Faults
STERO™ Installation and Operation Manual Fault Type Possible Cause Remedy function. • Delime machine if needed. Detergent concentration is too low or too high. Check detergent concentration setting (See operating instructions. Remove right, left and center strainer pans, Tank strainers clogged. -
Page 51: Maintenance
Installations and repairs carried out by non-authorized technicians or using non-genuine spare parts, and any technical alterations to the machine not approved by the manufacturer will invalidate the manufacturer's warranty. STERO reserves the right to make changes or improvements to its products without prior notice. Page 51 of 52 Ver1.0... -
Page 52: Notes
STERO™ Installation and Operation Manual 14 N OTES F41340 (January 2025) Ver1.0 Page 52 of 52...
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