Stacked 30 Pound Capacity Stacked 45 Pound Capacity Starting Serial No. 0602004144 Refer to Page 5 for Model Identification HIGH TEMP START LOW TEMP MED TEMP NO HEAT 25 C 1 SELECT TEMP 2 INSERT COIN 3 PUSH START 1 SELECT TEMP HIGH TEMP START LOW TEMP MED TEMP 2 INSERT COIN 3 NO HEAT PUSH START 25 C T477C T477C Keep These Instructions for Future Reference. (If this machine changes ownership, this manual must accompany machine.) www.comlaundry.com Part No.
Installation must conform with local codes or, in the absence of local codes, with: In the U.S.A., installation must conform to the latest edition of the American National Standard Z223.1/ NFPA 54 “National Fuel Gas Code” and Standard ANSI/NFPA 70 “National Electric Code.” In Canada, installation must comply with Standards CAN/CSA-B149.1 or Natural Gas and Propane Installation Code and CSA C22.1, latest edition, Canadian Electric Code, Part I.
WARNING • Installation of unit must be performed by a qualified installer. • Install tumbler according to manufacturer’s instructions and local codes. • DO NOT install a tumbler with flexible plastic venting materials. If flexible metal (foil type) duct is installed, it must be of a specific type identified by the appliance manufacturer as suitable for use with tumbler. Refer to section on connecting exhaust system. Flexible venting materials are known to collapse, be easily crushed, and trap lint.
Table of Contents Introduction......................................................................................... Model Identification ............................................................................. Customer Service.................................................................................. Wiring Diagram .................................................................................... Serial Plate Location........................................................................
Steam Requirements........................................................................... 44 Piping Recommendations ..................................................................... 44 Installing Steam Trap and Making Condensate Return Connections ............................................................................ 45 Single Drop Timer .............................................................................. Power-Up Mode..................................................................
Introduction Model Identification Information in this manual is applicable to these models: Gas Steam T30 CHD30STG2-CAT30L CHD30STG2-CAT30N CHD30STG2-CTT30L CHD30STG2-CTT30N CHD30STG2-CUT30L CHD30STG2-CUT30N DRST30G2-BAT30L DRST30G2-BAT30N DRST30G2-BTT30D DRST30G2-BTT30L DRST30G2-BTT30N DRST30G2-BUT30L DRST30G2-BUT30N HAT30L HAT30N HTT30D HTT30L HTT30N HUT30L HUT30N IPD30STG2-ITT30L IPD30STG2-ITT30N MTT30N NTT30N SAT30L SAT30N STT30D STT30L STT30N SUT30L SUT30N UAT30L UAT30N UTT30L UTT30N UUT30L UUT30N
Introduction Customer Service Serial Plate Location If literature or replacement parts are required, contact the source from which the machine was purchased or contact Alliance Laundry Systems at (920) 748-3950 for the name and address of the nearest authorized parts distributor. When calling or writing for information about your product, be sure to mention model and serial numbers. Model and serial numbers are found on serial plate on the rear of machine and inside door.
Safety Information Explanation of Safety Messages Precautionary statements (“DANGER,” “WARNING,” and “CAUTION”), followed by specific instructions, are found in this manual and on machine decals. These precautions are intended for the personal safety of the operator, user, servicer, and those maintaining the machine.
Safety Information Important Safety Instructions 14. The interior of the tumbler and the exhaust duct should be cleaned periodically by qualified service personnel. Save These Instructions WARNING Hazardous Voltage. Can cause shock, burn or cause death. Allow machine power to remain off for two minutes prior to working in and around AC inverter drive. W359 1. Read all instructions before using the tumbler. 2. Refer to the GROUNDING INSTRUCTIONS for the proper grounding of the tumbler. 3.
Safety Information 23. Remove laundry immediately after tumbler stops. 24. Always read and follow manufacturer’s instructions on packages of laundry and cleaning aids. Heed all warnings or precautions. To reduce the risk of poisoning or chemical burns, keep them out of reach of children at all times (preferably in a locked cabinet). 25. Do not tumble fiberglass curtains and draperies unless the label says it can be done.
Specifications and Dimensions Specifications T30 T45 66 dBA 67 dBA 544 (247) 673 (305) 30 x 26 (762 x 660) 33 x 30 (838 x 762) 2 x 30 (2 x 13.6) 2 x 45 (2 x 20.5) Drive Motor Horsepower** 1/4 1/2 Fan Motor Horsepower** 1/4 1/2 50 Hertz 340 (160) N/A 60 Hertz 400 (189) 600 (283) 50 Hertz 0.8 (2.0) N/A 60 Hertz 0.9 (2.3) 0.9 (2.3) 1/2 in. NPT 1/2 in. NPT 73,000 (21.4, 77) 95,000 (27.8, 100.2) 21 kW N/A 3/4 in. NPT N/A 3.
Specifications and Dimensions Cabinet Dimensions J A B C D E F H G I 70%1 TMB2332N Models A B C D E T30 28 in. (711 mm) 49 in. (1245 mm) 48.25 in. (1226 mm) 11.4 in. (290 mm) 10.7 in. (272 mm) T45 31.88 in. (810 mm) 50.4 in. (1280 mm) 49.3 in. (1252 mm) 10.3 in. (262 mm) 9.3 in. (236 mm) Models F G H I J T30 25.02 in. (636 mm) 42.76 in. (1086 mm) 27.38 in. (695 mm) 31.5 in. (800 mm) 76.25 in. (1937 mm) T45 29.37 in. (746 mm) 48.62 in. (1235 mm) 30.50 in.
Specifications and Dimensions Exhaust Outlet Locations A B C TMB1969N TMB1969N Models 12 Rear Exhaust Diameter A B C T30 Elliptical Fits 8 in. (203 mm) 36.54 in. (928 mm) 4.25 in. (108 mm) 62.42 in. (1585 mm) T45 Elliptical Fits 10 in. (254 mm) 40.88 in. (1038 mm) 4.75 in. (121 mm) 66.00 in.
Specifications and Dimensions Gas Connection Locations C B 1 A TMB1970N TMB1970N 1 1/2 in. NPT Gas Connection Models T30 Non-CE and Non-Australian CE and Australian T45 70304601 A 75.20 in. (1910 mm) 75.28 in. (1912 mm) 78.75 in. (2000 mm) B 1.74 in. (44 mm) 2.5 in. (64 mm) 4.12 in. (105 mm) © Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT C 36.84 in. (936 mm) 30.60 in. (777 mm) 42.88 in.
Specifications and Dimensions Electrical Connection Locations E B A D C GAS AND STEAM ELECTRIC TMB1971N Electric Service Models Gas and Steam Models Electric Models A B C D E T30 59 in. (1498 mm) 1.75 in. (44 mm) 35.63 in. (905 mm) 73.21 in. (1859 mm) 2.28 in. (58 mm) T45 62.5 in. (1588 mm) 1.75 in.
Specifications and Dimensions Steam Connection Locations C D A B A B TMB1972N Models Inlet Outlet A C B D T30 (Upper) 73.93 in. (1877 mm) 6.29 in. (160 mm) 62.71 in. (1592 mm) 2.39 in. (61 mm) T30 (Lower) 36.35 in. (923 mm) 6.29 in. (160 mm) 25.13 in. (638 mm) 2.39 in. (61 mm) NOTE: All connections use 3/4 inch NPT pipe.
Installation Pre-Installation Inspection Upon delivery, visually inspect the crate, carton and parts for any visible shipping damage. If the crate, carton, or cover is damaged or signs of possible damage are evident, have the carrier note the condition on the shipping papers before the shipping receipt is signed, or advise the carrier of the condition as soon as it is discovered. Remove the crate and protective cover as soon as possible and check the items listed on the packing list.
Installation IMPORTANT: Install tumblers with sufficient clearance for servicing and operation. Refer to Figure 1. WARNING To reduce the risk of serious injury, install lockable door(s) to prevent public access to rear of tumblers. W055 IMPORTANT: Keep tumbler area clear and free from combustible materials, gasoline and other flammable vapors and liquids. WARNING To reduce the risk of severe injury, clearance of tumbler cabinet from combustible construction must conform to the minimum clearances.
Installation Position and Level the Tumbler Unscrew the four shipping bolts (one at each corner). Remove tumbler from skid carefully to avoid putting pressure on the lower blower housing or motor assembly. NOTE: Do not throw bolts away – they are the leveling legs. The stacked tumbler has a fifth leveling leg which is shipped in the up position. The fifth leveling leg MUST BE installed properly on the lower left side of the blower housing to stabilize the tumbler. Refer to Figure 3.
Installation Before Placing Tumbler into Service 1. Remove or open all panels and check accessible bolts, nuts, screws, terminals and fittings for tightness. 2. Replace all panels and guards. 3. Remove and discard wire tie from the airflow switch so it can swing freely. Refer to Figure 4. IMPORTANT: Airflow switch operation may be affected by: Clogged lint screen. Failure to remove wire tie from rear of machine. Refer to Figure 4. Lack of make-up air. Refer to Exhaust Requirements section.
Installation 9. Wipe out the cylinder using an all-purpose cleaner or detergent and water solution. Refer to Figure 5. Installing CE Gas Drying Tumblers WARNING To reduce the risk of electric shock, fire, explosion, serious injury or death: • Disconnect electric power to the tumbler before servicing. • Close gas shut-off valve to gas tumbler before servicing. • Close steam valve to steam tumbler before servicing. • Never start the tumbler with any guards/ panels removed.
Installation Table 3 describes the different gases that are available in different CE countries, and how the machines need to be configured to operate with those gases. In the CE, there are Natural Gas configurations that do not allow for machine regulation, and L.P. Gas configurations that must be regulated. For L.P. Gas, third family B/P at 50 mbar, order regulated Natural Gas machines and convert according to Table 3.
Installation Gases and Configurations Country Code DK/NO/ SE/FI/CZ/ EE/LV/LT/ SI/SK Gas Type Group Supply Pressure, mbar Natural Gas H 20 B/P Diameter, mm 8.0 T30 T45 4.0 4.6 2 M402992 M411371 30 No Governor T30 T45 2.2 2.5 2 M401011 M401007 E 20 8.0 T30 T45 4.0 4.6 2 M402992 M411371 LL 30 No Governor T30 T45 2.2 2.5 2 M401011 M401007 L 25 11.0 T30 T45 4.0 4.6 2 M402992 M411371 L.P. Gas B/P 30 No Governor T30 T45 2.2 2.
Installation Specific Conversion Procedures How to Convert Gas Valve from Regulated to Unregulated NOTE: Conversion from regulated to unregulated is only needed when regulated tumblers were ordered, but regulated tumblers were needed. 2. Follow instructions in Conversion Kit, Part No. 431485 (Johnson Part No. GM-70 CBP). NOTE: This kit does not contain any burner orifices. Johnson GM7000 gas valve: 1. Disconnect electrical power from tumbler. Close gas shut-off valve to tumbler. Refer to Figure 7. 3.
Installation How to Change Burner Orifice Size 1. Disconnect electrical power from tumbler. Close gas shut-off valve to tumbler. Refer to Figure 6. 2. For Johnson GM7000 gas valve: Remove burner orifice(s) from the spud holder. Refer to Figure 7. 3. Install the new, correct burner orifices. Refer to Figure 8. Torque each to 9 – 10 Nm. 4. Commission tumbler for use. NOTE: Blank burner orifices are available as Part No. M400995. How to Adjust Gas Valve Governor/Regulator 1.
Exhaust Requirements Venting WARNING A drying tumbler produces combustible lint. To reduce the risk of fire, the tumbler must be exhausted to the outdoors. W057 To reduce the risk of fire and accumulation of combustible gases, DO NOT exhaust tumbler air into a window well, gas vent, chimney or enclosed, unventilated area such as an attic wall, ceiling, crawl space under a building, or concealed space of a building.
Exhaust Requirements space around the duct may be sealed with non-combustible material. Refer to Figure 9. Duct Diameter Equivalent Length of Rigid Straight Duct IMPORTANT: For best performance provide an individual exhaust duct for each tumbler. Do not install a hot water heater in a room containing tumblers. It is better to have the water heater in a separate room with a separate air inlet. 10 in. (254 mm) 12 in. (305 mm) 14 in. (355.6 mm) 16 in. (406.4 mm) 18 in. (457.
Exhaust Requirements 3 4 2 1 5 TMB2103N TMB2103N 1 2 3 4 5 Removable strip of panel in framing wall to permit removal of tumbler from framing wall Partition or bulkhead Minimum distance between exhaust opening and roof, ground or other obstruction: 36 in. (914 mm) 2 in. (51 mm) minimum clearance on both sides of duct Exhaust airflow – maximum length of duct: 14 ft. (4.
Exhaust Requirements Manifold Venting While it is preferable to exhaust tumblers individually to the outdoors, a main collector duct may be used if it is sized according to Figure 11 or Figure 12. This illustration indicates minimum diameters, and should be increased if the collector length exceeds 14 feet (4.3 m) and two 90° elbows. The diameter of a round duct must be increased by 10% for each additional 20 feet (6.1 m).
Exhaust Requirements 1 2 L K 3 J I H G F E D C B A ONE MANIFOLD ASSEMBLY TMB2019N 1 NOTE: Where the exhaust duct pierces a combustible wall or ceiling, the opening MUST be sized per local codes. 2 3 Outlet Duct Diameter 45° Typical Figure 11 Duct Station T30 T45 8 in. (203 mm) Duct 10 in. (254 mm) Duct A 8 in. (203 mm) 10 in. (254 mm) B 12 in. (305 mm) 15 in. (381 mm) C 15 in. (381 mm) 18 in. (457 mm) D 17 in. (432 mm) 21 in. (533 mm) E 19 in. (483 mm) 24 in.
Exhaust Requirements 1 2 I J K L L K J I CONTINUE TO A CONTINUE TO A TWO MANIFOLD ASSEMBLIES 3 TMB2018N 1 NOTE: Where the exhaust duct pierces a combustible wall or ceiling, the opening MUST be sized per local codes. 2 3 Outlet Duct Diameter 45° Typical Figure 12 Duct Station T30 T45 8 in. (203 mm) Duct 10 in. (254 mm) Duct A 12 in. (305 mm) 15 in. (381 mm) B 17 in. (432 mm) 22 in. (559 mm) C 22 in. (559 mm) 26 in. (660 mm) D 25 in. (635 mm) 30 in. (762 mm) E 27 in.
Gas Requirements WARNING To reduce the risk of fire or explosion, DO NOT CONNECT THE GAS LINE TO THE TUMBLER IF THE GAS SERVICE IS NOT THE SAME AS THAT SPECIFIED ON THE TUMBLER SERIAL PLATE! It will first be necessary to convert the gas burner orifice and gas valve. Appropriate conversion kits are available. W060 IMPORTANT: Any product revisions or conversions must be made by the Manufacturer’s Authorized Dealers, Distributors or local service personnel.
Gas Requirements Turn on gas and check all pipe connections (internal and external) for gas leaks with a non-corrosive leak detection fluid. Purge air in gas service line by operating the tumblers in the drying mode. If burner does not light and unit goes into lockout, open and close the door and restart. Repeat these steps until burner ignites. Use pipe compound, resistant to actions of L.P. gas, on all pipe threads.
Gas Requirements Gas Supply Pipe Sizing and Looping 1 3 2 9 11 10 12 1 2 3 4 5 6 7 8 9 4 M 5 8 6 7 TMB2126N 1 2 3 4 5 6 7 Gas Furnace (120,000 Btu/hr.) Gas Water Heaters (400,000 Btu/hr. each) Gas Space Heaters (70,000 Btu/hr. each) Sediment Traps, Supply Pressure Taps and Shut-off Valves. Refer To Figure 13. 1 in. (25.4 mm) Gas Pipe Loop 19 ft. (5.8 m) Minimum Pipe Size is 0.5 in. (12.7 mm) 8 9 10 11 12 25 ft. (7.
Gas Requirements Gas Pipe Size Required for 1000 Btu Natural Gas — 0.64 Specific Gravity at 7 ± 1.5 inches (17.4 ± 4 mbar, 1.74 ± 0.37 kPa) Water Column Pressure Equivalent Length Gas Appliances Total Btu/hr 100,000 120,000 140,000 160,000 180,000 200,000 300,000 400,000 500,000 600,000 700,000 800,000 900,000 1,000,000 1,100,000 1,200,000 1,300,000 1,400,000 1,500,000 1,600,000 1,700,000 1,800,000 1,900,000 2,000,000 2,200,000 2,400,000 2,600,000 2,800,000 3,000,000 25 feet (7.63 m) 50 feet (15.
Gas Requirements High Altitude Burner Orifice Sizing For proper operation at altitudes above 2000 feet (610 meters), the gas burner orifice size must be reduced to ensure complete combustion. Refer to Table 8. For CE models, consult local gas supplier. Altitude Model Gas T30 Natural Gas L.P. Gas T45 Natural Gas L.P. Gas Burner Orifice New Rate Part Number (Btu/hr.)* 4.0 M402996 134,320 0.1520 3.9 M402980 122,640 26 0.1470 3.7 M401000 110,960 2441-3050 28 0.1405 3.
Electrical Requirements WARNING To reduce the risk of electric shock, fire, explosion, serious injury or death: • Disconnect electric power to the tumbler before servicing. • Close gas shut-off valve to gas tumbler before servicing. • Close steam valve to steam tumbler before servicing. • Never start the tumbler with any guards/ panels removed. • Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.
Electrical Requirements Service/Ground Location Model Heat Source Ground and Terminal Block Locations L1 TH MV LAMP N Terminal Block L2 5 4 3 2 1 T30/T45 Non-CE T30: Gas or Steam T45: Gas LAMP GND GND TH VALV 70219001R2 Ground Screw SECURE GROUND WIRE TO GROUND SCREW TMB2041N Ground Lug L3 GROUND LUG L2 70218701R2 SECURE GROUND WIRE TO GROUND SCREW L1 1L1 13 NO 21 NC A1 13 NO 21 NC A1 LC1D32 LC1D32 T30 Non-CE Electric Power Distribution Block POWER DISTRIBUTION BLOCK 14 NO 22 NC
Electrical Requirements Connecting Electrical Service The following steps outline the procedure for connecting electrical service to the tumbler. 3 Phase models – Each tumbler must be connected to its own individual branch circuit breaker, not fuses, to avoid the possibility of “single phasing” and causing premature failure of the motor(s). Electrical service must be connected using the appropriate permanent rigid metal conduit system. Service conductors must be copper only.
Electrical Requirements Conversion Instructions If serial plate voltage is: 120 Volt/60 Hertz/ 1 Phase Tumbler can be converted to the following voltages: 208-240 Volt/60 Hertz/1 Phase Models: 3W&G 2W&G (T30 Models Only) 1. Prior to connecting service, locate the black/red wire which runs between terminal block and the motor relay or contactor. Refer to figure below.
Electrical Requirements If serial plate voltage is: Tumbler can be converted to the following voltages: 200-220 Volt/60 Hertz/ 1 Phase 100 Volt/60 Hertz/1 Phase INTERNATIONAL Models: 2W&G 2W&G 100 Volt/50 Hertz/1 Phase INTERNATIONAL Models: 2W&G 200 Volt/50 Hertz/ 1 Phase 1. Prior to connecting electric service, locate transformer configuration jumper in junction box area. 2W&G (T30 Models Only) 2.
Electrical Requirements Electrical Requirements for Gas and Steam Models Refer to Table 10 and Table 11. NOTE: Electrical specifications below are subject to change without notice. Always refer to product serial plate for most current specifications of product being installed. NOTE: Use copper conductors only. NOTE: Minimum wire sizes are obtained from Canadian Electrical Code for 75°C Conductors and are intended for use as a guideline only.
Electrical Requirements For T45 Gas Models (For Total Machine): Recommended Fuse Breaker or Breaker Rating Poles (Amps) Recommended Minimum Conductor Size (AWG [mm2]) Serial Plate Voltage Terminal Block Connections Required 208–240V/60Hz/1ph L1, L2, Neutral and ground 12.0 15 2 14 (2.08) 200–208V/60Hz/3ph L1, L2, L3 and ground 9.6 15 3 14 (2.08) 240V/60Hz/3ph L1, L2, L3 and ground 9.6 15 3 14 (2.08) 200V/50Hz or 60Hz/1ph L1, Neutral and ground 11.2 15 1 14 (2.
Electrical Requirements Electrical Requirements for Electric Models Refer to Table 12. NOTE: Electrical specifications below are subject to change without notice. Always refer to product serial plate for most current specifications of product being installed. NOTE: Connect to individual branch circuit. NOTE: Minimum wire sizes are obtained from Canadian Electrical Code for 75°C Conductors and are intended for use as a guideline only.
Steam Requirements NOTE: Machines require a constant 80 to 100 psig (5.62 to 7.03 kg/sq. cm) steam service for optimum operation. The maximum allowable steam pressure for use with 60 Hertz or 50 Hertz tumblers is 125 psig (8.6 bar). In no case may the pressure exceed the above value. Drying performance is significantly reduced at lower steam pressures. Obtain specific steam service pipe sizes from the steam system supplier or a qualified steam fitter.
Steam Requirements Installing Steam Trap and Making Condensate Return Connections The steam trap must be installed and the coil outlet connections must be connected to the condensate return lines. The following steps outline the procedure for installing the steam trap and connecting the condensate return lines. Refer to Figure 15 for typical installations. 1. Use flexible lines between steam inlet solenoid and steam coils, as well as outlet between steam coil and traps. 2.
Steam Requirements SUPPLY 2 1 4 9 3 5 10 6 4 8 RETURN 7 6 5 10 T473I T473I NOTE: Refer to Table 13 for sizing of steam lines. Piping must also be sized accordingly for length of runs, and number of elbows. 1 Steam Coil 6 Trap with Built-In Strainer 2 12 in. (305 mm) Riser 7 Vacuum Breaker (Optional) 3 Condensate Return Line from Supply Line 8 18 in.
Single Drop Timer NOTE: The following information is for models with an SD control suffix only. cool down time for a total time of 9 minutes for a coin pulse. For dipswitch settings refer to Table 14. Power-Up Mode Models Starting Serial No. 0909xxxxx When power is applied to the tumbler, the IN USE light flashes factory status information. Following this, the control goes into READY Mode (light off) or RUN Mode if power was interrupted during a cycle (light on, time remaining unchanged).
Single Drop Timer Dipswitch Settings Heat Switch Number Heat Time Per Coin Pulse (in minutes) 1 2 3 4 5 6 1 OFF OFF OFF OFF OFF OFF 2 ON OFF OFF OFF OFF OFF 3 OFF ON OFF OFF OFF OFF 4 ON ON OFF OFF OFF OFF 5 OFF OFF ON OFF OFF OFF 6 ON OFF ON OFF OFF OFF 7 OFF ON ON OFF OFF OFF 8 (factory default) ON ON ON OFF OFF OFF 9 OFF OFF OFF ON OFF OFF 10 ON OFF OFF ON OFF OFF 11 OFF ON OFF ON OFF OFF 12 ON ON OFF ON OFF OFF
Single Drop Timer Table 14 (continued) Heat Time Per Coin Pulse (in minutes) Heat Switch Number 1 2 3 4 5 6 38 ON OFF ON OFF OFF ON 39 OFF ON ON OFF OFF ON 40 ON ON ON OFF OFF ON 41 OFF OFF OFF ON OFF ON 42 ON OFF OFF ON OFF ON 43 OFF ON OFF ON OFF ON 44 ON ON OFF ON OFF ON 45 OFF OFF ON ON OFF ON 46 ON OFF ON ON OFF ON 47 OFF ON ON ON OFF ON 48 ON ON ON ON OFF ON 49 OFF OFF OFF OFF ON ON 50 ON OFF OFF OFF ON ON
Adjustments Loading Door Switch Airflow Switch The door switch should be adjusted so the cylinder stops when door is opened 2 inches (51 mm) plus or minus 0.25 inch (6 mm). This switch is a normally open switch and is closed by the hinge cam when the door is closed. If adjustment is required, refer to Figure 16 and proceed as follows: The airflow switch is set at the factory for proper operation. No adjustment necessary. 1. Close door and start tumbler, slowly open loading door.
Adjustments Door Strike The door strike must be adjusted to have sufficient tension to hold loading door closed against force of the load tumbling against it. There is proper adjustment of pull force when 8 to 15 pounds (35.6 N – 66.7 N) is required to open door. If adjustment is required, refer to Figure 17 and proceed as follows: To adjust, open door, loosen acorn nut, and turn door strike screw in or out as required. Retighten acorn nut.
Removing Tumbler from Service If the tumbler is to be removed from service, perform the following steps where applicable: Turn off electrical supply external to machine. Turn off electrical disconnect on machine. Turn off gas supply external to machine. Turn off manual gas shut-off valve on machine. Turn off steam supply external to machine. Remove all electric, gas and steam connections.