® COMBITHERM ® COMBINATION OVEN/STEAMERS GAS ML SERIES INSTALLATION SERVICE AND MAINTENANCE P.O. Box 450 ● (800)558-8744 U . S . A ./ CANADA ● W164 N9221 Water Street PHONE: (262)251-3800 ● Menomonee Falls, Wisconsin 53052-0450 FAX: (262)251-7067 ● U.S.A. (800)329-8744 U . S . A . (262)251-1907 INTL www.alto-shaam.
COMBITHERM ® GAS INSTALLATION, SERVICE AND MAINTENANCE MANUAL MANUEL D'INSTALLATION, DE MISE EN ROUTE ET D'ENTRETIEN MODELES : COMBITHERM GAS MODELS 6•10ML, 7•14ML, 10•10ML, 10•20ML, 12•18ML & 20•20ML COMBITHERM FOUR/CONVECTION VAPEUR 6•10 ML , 7•14 ML , 10•10 ML , 10•20 ML , 12•18 ML & 20•20 ML GAS SAFETY: Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance.
COMBITHERM ® TABLE OF CONTENTS GAS 2.0 CONTROL PANEL IDENTIFICATION . . .15 1.0 INSTALLATION 1.1 Receiving & Transportation . . . . . . .1 1.2 Basic Installation Site Requirements . . .1 2.1 Safety Precautions . . . . . . . . . . . . .17 1.3 Ventilation Requirements . . . . . . . . .2 2.2 Preventive Maintenance . . . . . . . . .18 1.4 Positioning On Site . . . . . . . . . . . . .2 2.3 Routine Cleaning Requirements . . .18 1.5 Installation Codes & Standards . . . .2 2.4 DAILY CLEANING 1.
COMBITHERM GAS INSTALLATION ® 1.1 RECEIVING & TRANSPORTATION Upon receipt of the Combitherm combination oven/ steamer, check the exterior of the shipping carton for any physical damage that could result in damage to the contents. If the oven was not received from the carrier in an upright position, there is a stronger possibility of concealed damage. Remove the carton or uncrate the unit carefully and inspect for any transit damage. Immediately report any damage to the delivering freight carrier.
C O M B I T H E R M G A S I N S TA L L AT I O N ® 1.3 VENTILATION REQUIREMENTS A steam ventilation hood is mandatory for the operation of the oven. The ventilation hood must be installed in accordance with local building codes for steam exhaust and must protrude 12-inches to 20-inches (300mm to 500mm) over the front side of the oven. A grease filter must be located in the protruding area of the hood. Grease filters should be thoroughly cleaned on a regular basis following manufacturer's instructions.
C O M B I T H E R M G A S I N S TA L L AT I O N ® 1.6 INSTALLATION REQUIREMENTS The installation surface must be non-combustible (unable to burn). 4" (102mm) ➡ Do not install oven adjacent to flammable surfaces. Strictly observe all local fire safety regulations. ➡ In order to ensure proper ventilation, a minimum distance of at least 6-inches (152mm) must be kept from the control panel side [ LEFT ] of the oven and any adjoining surfaces.
C O M B I T H E R M G A S I N S TA L L AT I O N ® 1.7 AIR SUPPLY REQUIREMENTS Installation of this oven must include a provision for an adequate flow of fresh air for gas combustion. This requirement must be observed by the installer as well as the operator. The bottom of the oven provides air supply access for gas combustion and must be kept clear at all times.
C O M B I T H E R M G A S I N S TA L L AT I O N ® 1.8 ASSEMBLY REQUIREMENTS 1.8.5 ROLL-IN CART (TROLLEY) GUIDE RAILS ( ON CART EQUIPPED MODELS ) Mount REAR SUPPORT on the bottom of the oven toward the back. Fasten each end of the REAR SUPPORT with a WASHER , LOCK WASHER , and BOLT . Align each GUIDE RAIL with the slotted holes located at the front of the REAR SUPPORT . Loosely fasten each GUIDE RAIL from the back of the REAR SUPPORT with a WASHER , LOCK WASHER , and NUT .
C O M B I T H E R M G A S I N S TA L L AT I O N ® 1.10 WATER SUPPLY CONNECT TO POTABLE ( DRINKABLE ) COLD WATER ONLY WATER PRESSURE REQUIREMENTS: M I N I M U M 30 PSI (2 BAR) MAXIMUM 90 PSI (6 BAR) Flush the water line at the installation site before connecting the oven to the water supply. A shut-off valve and approved back-flow preventer must be installed when connecting the oven to the cold water intake. The water supply line must be a minimum of 3/4-inch (NPT) (19mm).
C O M B I T H E R M G A S I N S TA L L AT I O N ® 1.12 GAS CONNECTION REQUIREMENTS Installation of this oven must be completed by a qualified installer familiar with the local codes and regulations governing the installation of commercial gas appliances. Installation must be in accordance with local codes, and in the absence of local codes, with the National Fuel Gas Code ANSI Z223.1 (latest edition). In Canada, the appropriate code is the Natural Gas Installation Code, CAN/CGA-B149.
C O M B I T H E R M G A S I N S TA L L AT I O N ® 1.15 LEAK TESTING If a pressure leak test above 1/2 psi is to be performed on the building supply gas piping, the shut-off gas valve and oven inlet gas supply line must be disconnected from the building supply piping before conducting the pressure test. Failure to do so may result in damage to the manual gas valve, gas components in the oven, or both.
C O M B I T H E R M G A S I N S TA L L AT I O N ® 1 . 1 8 G A S P R E S S U R E C H A RT The gas valve, pilot burner and nozzles for the main burner have been fitted according to the gas type specified on the name plate. Technical specifications for the gas system are as follows: Combitherm Gas Model 6•10 7•14 ML 10•10 12•18 10•20 20•20 Natural Gas Connected pressure rating Min. connected pressure Max.
C O M B I T H E R M G A S I N S TA L L AT I O N ® 1.20 BURNER PILOT ADJUSTMENTS Combitherm gas ovens are equipped with intermittent pilotbased operation and are fitted with a Honeywell gas valve. The gas valve has a built-in pressure regulator and a hot surface intermittent pilot ignition control for safe operation. The valve has a step open feature (standard) for natural gas operation. For propane, a full open feature is standard. Explanation of the gas valve is shown in the illustration.
C O M B I T H E R M G A S I N S TA L L AT I O N ® 1.
C O M B I T H E R M G A S I N S TA L L AT I O N ® 1.22 STACKING COMBITHERM CONNECTIONS Stacking Combitherm ovens require two (2) water connections, two (2) drain connections, and two (2) gas connections. I F L O C A L C O D E A L L OW S , the gas, water, and drain may be manifolded as long as the size of the water inlet is increased to 1-inch (25,4mm) and the drains include an external vent. The drawing illustrates one suggested method of a manifold installation.
C O M B I T H E R M G A S I N S TA L L AT I O N ® 1.23 POST-INSTALLATION CHECK LIST In order for this oven to operate properly, installation must conform with the instructions provided in this manual. Following full installation the following list is provided as a final check to help assure conformance. INSTALLER REQUIREMENTS INITIALS / DATE ■ Bottom of oven has been checked for damage due to improper positioning on site.
1.24 E M E R G E N C Y O P E R AT I O N In the event of an error code, operation of the Combitherm can be continued on a limited basis for a short duration. Cooking times may be longer than normal operation and close monitoring of the cooking process is recommended. Contact an authorized service agency immediately if the problem cannot be rectified with simple steps in the troubleshooting guidelines located in this manual.
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2 . 0 C O N T R O L PA N E L I D E N T I F I C AT I O N POWER ON/OFF KEY Activates power to the oven and automatically fills the steam generator with water which will heat to a stand-by mode temperature of 150°F (65°C). The steam generator flush is also activated by pressing this key. STEAM MODE KEY The oven will operate in the steam mode at a temperature range of 86°F to 248°F (30°C to 120°C). • Automatic steaming at 212°F (100°C). FACTORY- SET DEFAULT .
2 . 1 I M P O R TA N T S A F E T Y P R E C A U T I O N S For safe release of the cooking compartment steam, initially open the door approximately 2" (50mm) only. Stand behind the door as the hot STEAM steam is released. DO NOT USE THE ATTACHED HAND-HELD HOSE TO SPRAY ANYTHING OTHER THAN THE INTERIOR OF THE COMBITHERM OVEN COMPARTMENT. AT NO TIME SHOULD THE EXTERIOR OF THE OVEN BE STEAM CLEANED, HOSED-DOWN WITH THE HAND-SPRAYER, FLOODED WITH WATER, OR FLOODED WITH LIQUID SOLUTION OF ANY KIND.
COMBITHERM CLEANING & MAINTENANCE ® 2.2 Preventive Maintenance In addition to the routine cleaning and maintenance procedures, there are several additional steps to be taken for both sanitation purposes and to keep the oven running at top operating efficiency. These additional safeguards will help prevent inconvenient down time and costly repairs. ● DO NOT DISPOSE OF GREASE, FAT, OR SOLID WASTE DOWN THE OVEN DRAIN. Fats and solids will eventually coagulate in the drain system, causing blockage.
COMBITHERM CLEANING & MAINTENANCE ® RUBBER GLOVES AND PROTECTIVE EYE WEAR MUST BE WORN WHEN USING THE OVEN CLEANER. USE AUTHORIZED COMBITHERM LIQUID OVEN CLEANER ONLY. Unauthorized cleaning agents may discolor or harm interior surfaces of the oven. Read and understand label and material safety data sheet before using the oven cleaner. Causes severe burns. Do not get in eyes, on skin, or on clothing. Do not wear contacts. Harmful or fatal if swallowed. Do not breathe mist. Use in well ventilated area.
COMBITHERM CLEANING & MAINTENANCE ® 2.4.2 A U T O M AT I C C L E A N I N G P R O G R A M The Combitherm automatic cleaning function selects the proper temperature for each step of the cleaning process. With the oven power on: PRESS THE CHEF FUNCTION KEY. ➡ Rotate the adjustment knob until the clean symbol is highlighted in the display. PRESS THE CHEF FUNCTION KEY. ➡ Press the up Clean and down arrow keys or rotate the adjustment knob to select YES for the automatic cleaning function.
COMBITHERM CLEANING & MAINTENANCE ® 2.5 Monthly Cleaning — GAS Perform once a month in addition to the daily oven cleaning procedure. 2 . 5 . 1 W AT E R I N TA K E F I LT E R C L E A N I N G Monthly cleaning of the filter at the front of the water intake connection will prevent the water injection system from becoming blocked. 1. Press the oven power switch to the OFF position. 2. Disconnect the water intake connection located below the oven. 3. Remove the line filter and clean thoroughly. 4.
COMBITHERM CLEANING & MAINTENANCE Monthly Cleaning ® Thoroughly clean the fan at a minimum of once every six months. This procedure will remove the heavy build-up of grease which will accumulate on the oven fan. 2 . 5 . 4 FA N C L E A N I N G A Fan Service Tool is included with each Combitherm shipment. This tool must be used for both disassembling and reassembling the fan whenever a thorough cleaning is required. 1. Press the oven power switch to the OFF position. 2.
COMBITHERM CLEANING & MAINTENANCE ® 2 . 6 R O L L - I N C A RT / F O O D T R O L L E Y C L E A N I N G ( O N EQUIPPED MODELS ) 1. Remove food trolley to a cart wash area. Trolleys may be cleaned using any mild cleaning detergent and warm water. 2. Hand wipe all framing, slides, drip pan, and base. Thoroughly clean debris from the casters. A spray hose can be used for easier cart cleaning. 3. Remove detergent solution with warm water. 4.
3 . 0 C O M B I T H E R M G A S S E RV I C E S E C T I O N ® 3.1 COMBITHERM SERVICE Alto-Shaam urges the user to maintain a record of service performed on the Combitherm Gas Oven/Steamer. Model: ______________________ Serial No: ______________________ Gas Type: ______________________ D AT E PROBLEM DETECTED CORRECTION PERFORMED C O M B I T H E R M G A S I N S TA L L AT I O N A N D M A I N T E N A N C E M A N UA L PG.
C O M B I T H E R M G A S S E RV I C E S E C T I O N ® 3.2 COMBITHERM GAS Sound Absorber (EXHAUST SILENCER) Flue Diverter 3.2.1 EXTERIOR COMPONENTS Spray Hose Food Probe 3.2.2 OPERATING SCHEMATIC Door Latch Burner Tubes Cart (Trolley) Door Handle Cold water is used for generating steam and for cooling the drain water. The water is sprayed over the hottest area of the oven and is converted into steam. Steam is blown into the oven by means of a fan wheel. 3.2.
C O M B I T H E R M G A S S E RV I C E S E C T I O N ® 3.
C O M B I T H E R M G A S S E RV I C E S E C T I O N ® 3.3 SERVICE VIEW: Motor Contactor & Protection Switches Combitherm Gas Models 6•10ML, 7•14ML, 10•10ML, 10•20ML and 12•18ML BYPASS Light Bypass Probe Relay Board Control Board Communication Cable High Limit Motor Overload Motor Contactor Power Board Closed System Board Terminals Fuse — Holder C O M B I T H E R M G A S I N S TA L L AT I O N A N D M A I N T E N A N C E M A N UA L Transformer — 6011ML PG.
C O M B I T H E R M G A S S E RV I C E S E C T I O N ® 3.4 SERVICE VIEW: Left Side Panel Components Combitherm Gas Model 20•20ML Sound Absorber Bypass Probe Display Control Board Water Nozzle Water Cooling Line Motors Wiring Diagram Pressure Switches Pressure Gauges Fuse — Holder, 35A Bypass to Drain Fuses Gas Valve Solenoid Valves Transformer 110/24V Water Pressure Adjustment Terminals Motor Contactor C O M B I T H E R M G A S I N S TA L L AT I O N A N D M A I N T E N A N C E M A N UA L PG.
C O M B I T H E R M G A S S E RV I C E S E C T I O N ® 3.4 SERVICE VIEW: Motor Contactor & Protection Switches Combitherm Gas Model 20•20ML BYPASS Light Bypass Probe Relay Board Control Board Communication Cable Motor Overload High Limit Motor Contactor Power Board Closed System Board Terminals Fuse — Holder C O M B I T H E R M G A S I N S TA L L AT I O N A N D M A I N T E N A N C E M A N UA L Transformer — 6011ML PG.
3.5 TROUBLESHOOTING In the event of a Combitherm malfunction during operation, an error code and message will appear in the display to assist in finding a rapid solution to the problem. The following is a list of all error codes which includes the cause along with a possible solution. ERROR CODE E01 DESCRIPTION OF ERROR POSSIBLE CAUSE/REMEDY Low water level: Sufficient water level in steam generator Water tap is closed. has not been reached with 3 minutes.
3.5 TROUBLESHOOTING ERROR CODE E23 DESCRIPTION OF ERROR Steam generator probe (B4 thermocouple) is interrupted. POSSIBLE CAUSE/REMEDY Probe connection is bad at X6 on the control module. Steam generator probe (B4) is defective. Bad probe connection. E25 Condenser probe (B3 thermocouple) is interrupted. Probe connection is bad at X6 on the control module. Condenser probe (B3) is interrupted or defective. Bad probe connection. E26 Safety temperature probe (N8 thermocouple) is interrupted.
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3 . 6 - Pa r t s L i s t • C o m b i t h e r m PART DESCRIPTION ML Gas 6•10MLGAS 7•14MLGAS 10•10MLGAS 10•20MLGAS 12•18MLGAS 20•20MLGAS Fuse, 2 Amp FU-3774 FU-3774 FU-3774 FU-3774 FU-3774 FU-3774 Fuse Holder, 2 Amp FU-3772 FU-3772 FU-3772 FU-3772 FU-3772 FU-3772 Fuse, 6.3 Amp FU-33451 FU-33451 FU-33451 FU-33451 FU-33451 FU-33451 Fuse Holder, 6.
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® C O M B I T H E R M G A S I N S TA L L AT I O N A N D M A I N T E N A N C E M A N UA L — 6011 PG.
® C O M B I T H E R M G A S I N S TA L L AT I O N A N D M A I N T E N A N C E M A N UA L — 6011ML PG.
TR ANS P O RTAT I O N DAMAGE and CLAIMS LIMITED WARRANTY All Alto-Shaam equipment is sold F.O.B. shipping point, and when accepted by the carrier, such shipments become the property of the consignee. Should damage occur in shipment, it is a matter between the carrier and the consignee. In such cases, the carrier is assumed to be responsible for the safe delivery of the merchandise, unless negligence can be established on the part of the shipper. 1.
