American Dryer Corp. MDG-120PVV manual

MDG-120PVV / MD-170PTVW Installa tion Manual Phase 7 / Non-Coin / Dual Timer with S.A.F .E. System W ARNING: For your safety the information in this manual must be followed to minimize the risk of fire or explosion or to prevent property damage, personal injury or death. — Do not store or use gasoline or other flammable vapors and liquids in the [...]

Retain This Manual In A Safe Place For Futur e Refer ence This product embodies advanced concepts in engineering, design, and safety . If this product is properly maintained, it will provide many years of safe, efficient, and trouble free operation. ONLY qualified technicians should service this equipment. OBSER VE ALL SAFETY PRECAUTIONS displayed [...]

IMPOR T ANT YOU MUST DISCONNECT AND LOCKOUT THE ELECTRIC SUPPL Y AND THE GAS SUPPL Y BEFORE ANY COVERS OR GUARDS ARE REMOVED FROM THE MACHINE T O ALLOW ACCESS FOR CLEANING , ADJUSTING , INST ALLA TION, OR TESTING OF ANY EQUIPMENT PER OSHA (Occupational Safety and Health Administration) ST ANDARDS. W ARNING CHILDREN SHOULD NOT BE ALLOWED T O PLA Y O[...]

W ARNING The dryer must never be operated with any of the back guards, outer tops, or service panels removed. PERSONAL INJURY OR FIRE COULD RESUL T . IMPOR T ANT PLEASE OBSER VE ALL SAFETY PRECAUTIONS displayed on the equipment and/or specified in the installation manual included with the dryer . W ARNING DR YER MUST NEVER BE OPERA TED WITHOUT THE [...]

SECTION I SAFETY PRECAUTIONS ......................................................................................................................................... 4 SECTION II SPECIFICA TIONS ................................................................................................................................................... 6 A . [...]

4 Maytag Co. 1 13395 - 6 SECTION I SAFETY PRECAUTIONS W ARNING: For your safety , the information in this manual must be followed to minimize the risk of fire or explosion or to prevent property damage, personal injury , or loss of life. W ARNING: The dryer must never be operated with any of the back guards, outer tops, or service panels removed . [...]

1 13395 - 6 Maytag Co. 5 7. A program should be established for the inspection and cleaning of lint in the heating unit area, exhaust ductwork, and inside the dryer . The frequency of inspection and cleaning can best be determined from experience at each location. W ARNING: The collection of lint in the burner area and exhaust ductwork can create a[...]

6 Maytag Co. 1 13395 - 6 M AX I MU M C AP AC I T Y (DR Y WEI G H T ) 120 l b 54. 4 kg BASKET ( T U M BLER ) DI AM ET ER 44 - 5/ 8 ” 1 13. 3 cm BASKET ( T U M BLER ) DEPT H 42 - 1/ 8 ” 170. 0 cm BASKET ( T U M BLER ) VO LU M E 38 . 1 cu f t 1078. 87 L BASKET ( T U M BLER ) M O T O R 3/ 4 h p 0. 560 kW DOO R O PE N I N G (DI A M E T ER ) 31- 3/8?[...]

1 13395 - 6 Maytag Co. 7 NOTE: The manufacturer reserves the right to make changes in specifications at any time without notice or obligation. MDG-120 S pecifications[...]

8 Maytag Co. 1 13395 - 6 MA X I M U M C A PA C I T Y (D RY WE I GHT ) 1 7 0 l b 77. 1 1 kg T U MBLER DI AM ET ER 5 1 - 1 / 2 ” 130. 81 cm T U M B L E R D E P T H 42- 1/2 ” 107. 95 cm T U M B L E R V O L U M E 51. 20 cu f t 1, 449. 82 L T UMB LE R/D R I V E MOT OR 1 h p 0. 75 kW BLO W ER / F AN M O T O R 7 - 1 /2 hp 5. 59 kW DO O R O PENI N G ( [...]

1 13395 - 6 Maytag Co. 9 MD-170 S pecifications NOTE: The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.[...]

10 Maytag Co. 1 13395 - 6 SECTION III INST ALLA TION PROCEDURES Installation should be performed by competent technicians in accordance with local and state codes. In the absence of these codes, the installation must conform to applicable American National Standards: ANSI Z223.1- LA TEST EDITION (National Fuel Gas Code) or ANSI/NFP A NO. 70-LA TEST[...]

1 13395 - 6 Maytag Co. 11 CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors. Every 6 months, inspect the exhaust ducting and remove any lint buildup. IMPOR T ANT : The dryer must be installed in a location/environment, which the ambient temperature remains between 40° F (4.44° C) and 130° F (54.44° C) . B. UNP [...]

12 Maytag Co. 1 13395 - 6 2. If more headroom is needed when moving dryer into position, the top console (module) may be removed. T o Remove T op Console (Module) a . Disconnect the ground wire (A) at the rear upper left hand corner of dryer . b. Remove the eight (8) sets of nuts and washers (B) holding the console (module) to base. c . Open the co[...]

1 13395 - 6 Maytag Co. 13 3. Exhaust T ransition Piece Inside the basket (tumbler) of this dryer is an exhaust transition piece that must be installed on the outlet of the exhaust before any further venting is connected: a . Remove the exhaust transition piece from the basket (tumbler) and place it on the exhaust outlet. b. Using the screws provide[...]

14 Maytag Co. 1 13395 - 6 C. DR YER ENCLOSURE REQUIREMENTS Bulkheads and partitions should be made of noncombustible material. NOTE: Allowances must be made for opening the control door . A . 40-inches (101.6 cm) for optimum opening of load door . B . The maximum thickness of the bulkhead is 4-inches (10.16 cm). C . For gas dryers a minimum overhea[...]

1 13395 - 6 Maytag Co. 15 D. FRESH AIR SUPPL Y REQUIREMENTS When the dryer is operating, it draws in room air , heats it, passes this air through the tumbler , and exhausts it out of the building. Therefore, the room air must be continually replenished from the outdoors. If the make-up air is inadequate, drying time and drying efficiency will be ad[...]

16 Maytag Co. 1 13395 - 6 E. EXHAUST REQUIREMENTS Exhaust ductwork should be designed and installed by a qualified professional. Improperly sized ductwork will create excessive back pressure, which results in slow drying, increased use of ener gy , and shutdown of the burner by the airflow (sail) switch, burner hi-limits, or lint chamber hi-limit p[...]

1 13395 - 6 Maytag Co. 17 1. Single Dryer V enting IMPOR T ANT : For extended ductwork runs, the cross-sectional area of the ductwork can only be increased to an extent. When the ductwork approaches the maximum limits as noted in this manual, a professional heating, ventilating, and air -conditioning (HV AC) firm should be consulted for proper vent[...]

18 Maytag Co. 1 13395 - 6 4. Multiple Dryer (Common) V enting IMPOR T ANT : For extended ductwork runs, the cross-sectional area of the ductwork can only be increased to an extent. When the ductwork approaches the maximum limits as noted in this manual, a professional heating, ventilating, and air-conditioning (HV AC) firm should be consulted for p[...]

1 13395 - 6 Maytag Co. 19 F . ELECTRICAL INFORMA TION 1. Electrical Requirements ALL electrical connections must be made by a properly licensed and competent electrician . This is to ensure that the electrical installation is adequate and conforms to local and state regulations or codes. In the absence of such codes, ALL electrical connections, mat[...]

20 Maytag Co. 1 13395 - 6 2. Electrical Service Specifications IMPOR T ANT : Figures shown are for reversing models. M D - 120 G as ELECT R I CAL SER VI CE S PECI FI CAT I O N S (PER DR Y ER ) IMP OR TAN T : NO TES : A. B. C. 208 V AC AN D 230/ 240 V AC AR E N OT T H E SAME. Wh en orde rin g, spec ify e x act v olt age. Wh en f u ses are u se d t h[...]

1 13395 - 6 Maytag Co. 21 3. Grounding A ground (earth) connection must be provided and installed in accordance with state and local codes. In the absence of these codes, grounding must conform to applicable requirements of the National Electrical Code ANSI/NFP A NO. 70-LA TEST EDITION, or in Canada, the installation must conform to applicable Cana[...]

22 Maytag Co. 1 13395 - 6 G . GAS INFORMA TION It is your responsibility to have ALL plumbing connections made by a qualified professional to ensure that the gas plumbing installation is adequate and conforms to local and state regulations or codes. In the absence of such codes, ALL plumbing connections, materials, and workmanship must conform to t[...]

1 13395 - 6 Maytag Co. 23 2. T echnical Gas Data a . Gas Specifications Shaded areas are stated in metric equivalents * Measured at outlet side of gas valve pressure tap when gas valve is on. b. Gas Connections Inlet connection -------------- 1” N. P .T . Inlet supply size -------------- 1” Diameter Pipe (minimum) 1) Natural Gas Regulation is c[...]

24 Maytag Co. 1 13395 - 6 3. Piping/Connections ALL components/materials must conform to National Fuel Gas Code Specifications ANSI Z223.1-LA TEST EDITION, or in Canada, CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA-B149.2-M91 (Liquid Propane [L.P .] Gas) or LA TEST EDITION (for General Installation and Gas Plumbing), as well as local codes and ordin[...]

1 13395 - 6 Maytag Co. 25 IMPOR T ANT : The dryer and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa). NOTE: The dryer must be isolated from the gas supply piping system by closing its individual manual shutoff valve duri[...]

26 Maytag Co. 1 13395 - 6 H. PREP ARA TION FOR OPERA TION The following items should be checked before attempting to operate the dryer: 1. Read ALL “ CAUTION ,” “ W ARNING ,” and “ DIRECTION ” labels attached to the dryer . 2. Check incoming supply voltage to be sure that it is the same as indicated on the dryer data label. In case of 2[...]

1 13395 - 6 Maytag Co. 27 I. PREOPERA TIONAL TEST ALL dryers are thoroughly tested and inspected before leaving the factory . However , a preoperational test should be performed before the dryer is publicly used. It is possible that adjustments have changed in transit or due to marginal location (installation) conditions. 1. T o start the dryer: a [...]

28 Maytag Co. 1 13395 - 6 The steam damper should not “slam” (open or closed) when it reaches the end of (piston) travel. Additionally , the steam damper should not bind and/or stop during travel. If either of these conditions occur , the flow control must be adjusted. Refer to the bottom illustration on page 34 for air adjustment instructions.[...]

1 13395 - 6 Maytag Co. 29 J. SHUTDOWN INSTRUCTIONS If the dryer is to be shutdown (taken out of service) for a period of time, the following must be performed: 1. Discontinue power to the dryer either at the external disconnect switch or the circuit breaker . 2. Discontinue the gas or steam supply: a. GAS MODELS – discontinue the gas supply . 1) [...]

30 Maytag Co. 1 13395 - 6 L. COMPRESSED AIR REQUIREMENTS (MD-170 Only) The MD-170 model dryer requires an external supply of compressed air of 2.5 cfm at 80 psi (552 kPa). For steam models, compressed air is necessary for the air operated steam damper . On both the steam model as well as the gas model, compressed air is necessary/required for blowe[...]

1 13395 - 6 Maytag Co. 31 M. STEAM INFORMA TION (MD-170 Only) It is your responsibility to have ALL steam plumbing connections made by a qualified professional to assure that the installation is adequate and conforms to local and state regulations or codes. IMPOR T ANT : Failure to comply with the requirements stipulated in this manual can result i[...]

32 Maytag Co. 1 13395 - 6 b. The steam supply line to the dryer must include a 12-inch (30.48 cm) riser along with a drip trap and check valve. This will prevent any condensate from entering the steam coil. c . Flexible hoses or couplings must be used. The dryer vibrates slightly when it runs and this will cause the steam coil connections to crack [...]

1 13395 - 6 Maytag Co. 33 4. S team Damper Air System Connections The dryer is manufactured with a pneumatic (piston) damper system, which requires an external supply of compressed air . The air connection is made to the steam damper solenoid valve, which is located at the rear inner top area of the dryer just in front of the electric service relay[...]

34 Maytag Co. 1 13395 - 6 6. S team Damper Air Piston (Flow Control) Operation Adjustment Although the steam damper operation was tested and adjusted prior to shipping at 80 psi (5.51 bar), steam damper operation must be checked before the dryer is put into operation. Refer to the illustration above for correct steam damper operation. If steam damp[...]

1 13395 - 6 Maytag Co. 35 SECTION IV SER VICE/P AR TS INFORMA TION A. SER VICE Service must be performed by a qualified trained technician, service agency , or gas supplier . If service is required, contact the dealer from whom the Maytag equipment was purchased. If the dealer cannot be contacted or is unknown, contact the Maytag Co . for a dealer [...]

36 Maytag Co. 1 13395 - 6 SECTION V W ARRANTY INFORMA TION A. RETURNING W ARRANTY CARDS Before any dryer leaves the manufacturer ’ s test area, a warranty card is placed on the back side of the main door glass. These warranty cards are intended to serve the customer where we record the individual installation date and warranty information to bett[...]

1 13395 - 6 Maytag Co. 37 SECTION VI ROUTINE MAINTENANCE A. CLEANING A program and/or schedule should be established for periodic inspection, cleaning, and removal of lint from various areas of the dryer , as well as throughout the ductwork system. The frequency of cleaning can best be determined from experience at each location. Maximum operating [...]

38 Maytag Co. 1 13395 - 6 STEAM DRYERS Clean the steam coil fins. Suggest using compressed air and a vacuum cleaner with brush attachment. NOTE: When cleaning steam coil fins, be careful not to bend the fins. If fins are bent, straighten by using a fin comb, which is available from any local air-conditioning supply house. 90 DA YS Remove lint from [...]

1 13395 - 6 Maytag Co. 39 B. ADJUSTMENTS 7 DA YS AFTER INST ALLA TION AND EVER Y 6 MONTHS THEREAFTER Inspect bolts, nuts, screws, setscrews, grounding connections, and nonpermanent gas connections (unions, shutoff valves, and orifices). Motor and drive belts should be examined. Cracked or seriously frayed belts should be replaced. T ighten loose V [...]

40 Maytag Co. 1 13395 - 6 SECTION VII MANUAL RESET BURNER HI-LIMIT INSTRUCTIONS A. PHASE 7 This dryer was manufactured with a manual reset burner hi-limit thermostat, which is monitored by the Phase 7 computer . If the burner hi-limit is open prior to the start of the drying cycle, the dryer will start momentarily and then shut down, the Phase 7 co[...]

1 13395 - 6 Maytag Co. 41 SECTION VIII DA T A LABEL INFORMA TION When contacting Maytag , certain information is required to ensure proper service/parts information from Maytag . This information is on the data label af fixed to the left side panel/wall area behind the control door . When contacting Maytag , please have the model number and serial [...]

42 Maytag Co. 1 13395 - 6 SECTION IX REVERSING TIMER SPIN/DWELL ADJUSTMENTS T imer models have an electric reversing timer in the electric service box, which is located in the upper left rear area of the dryer . Both the dwell (stop) time and basket (tumbler) spin time are adjustable by mode selection switches located on the electronic timer (refer[...]

1 13395 - 6 Maytag Co. 43 SECTION X PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT COMPONENTS 1. Microprocessor Controller (Computer) Board a . Phase 7 Non-Coin Models 1) Upon completing installation of the replacement microprocessor controller (computer) board, reestablish power to the dryer . 2) Start the drying cycle by pressing any of the preset[...]

44 Maytag Co. 1 13395 - 6 2. For Models with Direct Spark Ignition (DSI) Module (T ype I) Theory of Operation: Start the drying cycle. When the gas burner ignites within the chosen trial for ignition time (6-seconds), the flame sensor detects gas burner flame and signals the DSI module to keep the gas valve open as long as there is a call for heat.[...]

1 13395 - 6 Maytag Co. 45 SECTION XI SENSOR ACTIV A TED FIRE EXTINGUISHING (S.A.F .E.) SYSTEM (MICROPROCESSOR MODELS ONL Y) The exclusive fire suppression system will extinguish fires that may start in the drying basket (tumbler). A series of sensors positioned throughout the basket (tumbler) and interfaced with the microprocessor controller (compu[...]

46 Maytag Co. 1 13395 - 6 OPTIONAL MANUAL BYP ASS Provisions are made in the dryer ’ s fire suppression system for the installation of an optional manual bypass. Depending on the model dryer , the connections for the manual bypass are made at the “T” or “three way” fitting located in the outlet supply side of the water solenoid valve. The[...]

1 13395 - 6 Maytag Co. 47 W ARNING: If the water in the supply line or water solenoid valve freezes, the fire suppression system will be INOPERA TIVE!! The manual ball cock shutoff valve must be located outside of the dryer at a distance from the dryer where it is easily accessible. 3. Electrical Requirements No independent external power source or[...]

48 Maytag Co. 1 13395 - 6 Once the fire suppression system routine is activated, the microprocessor controller (computer) will display “S.A.F .E. SYSTEM ACTIV A TED” and water will be injected into the basket (tumbler) chamber . Any time water is being injected into the basket (tumbler), the basket (tumbler) drive will turn the load for 1-secon[...]

1 13395 - 6 Maytag Co. 49 FIRE SUPPRESSION SYSTEM DIAGNOSTICS MESSAGES OPEN THERMISTOR PROBE – This message indicates that the fire suppression system thermistor probe either is not connected or is damaged. If this condition is detected, the microprocessor controller (computer) will immediately enter S.A.F .E. SYSTEM DISABLED Mode. SHOR TED THERM[...]

Part No. 113395 6 - 05/01/07 - 0[...]