MDG-75 Installation/Operator's Manual WARNING: 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. AVERTISSEMENT: Assurez-vous de bien suivre les instructions données dans cette notice pour réduire au minimum le risque dincendie ou dexplosion ou pour éviter tout dommage matériel, toute blessure ou la mort.
Retain This Manual In A Safe Place For Future Reference Our products embody 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. OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the installation/operator's manual included with the dryer.
IMPORTANT YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and THE GAS SUPPLY BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) STANDARDS. Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper operation. «Attention: Lor des opérations dentretien des commandes étiqueter tous fils avant de les déconnecter.
WARNING The dryer must never be operated with any of the back guards, outer tops, or service panels removed. PERSONAL INJURY or FIRE COULD RESULT. WARNING DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER/SCREEN IN PLACE...EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED. IMPORTANT PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment and/or specified in the installation/operator's manual included with the dryer.
Table of Contents SECTION I IMPORTANT INFORMATION ............................................................................... 3 A. Receiving and Handling ............................................................................................................ 3 B. Safety Precautions ..................................................................................................................... 4 SECTION II SPECIFICATIONS ..........................................................................
SECTION VI ROUTINE MAINTENANCE .................................................................................. 35 A. Cleaning ................................................................................................................................... 35 B. Adjustments .............................................................................................................................. 37 SECTION VII PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT COMPONENTS .................................
SECTION I IMPORTANT INFORMATION A. RECEIVING and HANDLING The dryer is shipped in a protective stretch wrap cover with protective cardboard corners and top cover (or optional box) as a means of preventing damage in transit. Upon delivery, the dryer and/or packaging, and wooden skid should be visually inspected for shipping damage. If any damage whatsoever is noticed, inspect further before delivering carrier leaves. Dryers damaged in shipment. 1.
B. SAFETY PRECAUTIONS WARNING: 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. WARNING: The dryer must never be operated with any of the back guards, outer tops, or service panels removed. PERSONAL INJURY or FIRE COULD RESULT. 1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. 2.
7. A program should be established for the inspection and cleaning of lint in the heating unit area, exhaust duct work, and inside the dryer. The frequency of inspection and cleaning can best be determined from experience at each location. WARNING: The collection of lint in the burner area and exhaust duct work can create a potential fire hazard. 8. For personal safety, the dryer must be electrically grounded in accordance with local codes and/or the National Electric Code ANSI/NFPA NO. 70-LATEST EDITION.
SECTION II SPECIFICATIONS/COMPONENT IDENTIFICATION A. SPECIFICATIONS 0$;,080 &$3,&,7< W OEV NJ %$6.(7 ',$0(7(5 FP %$6.(7 '(37+ FP %$6.(7 02725 +3 NZ '225 23(1,1* 'LDPHWHU FP FX IW FX P '5< :(,*+ %$6.(7 92/80( '5<(56 3(5 &217$,1(5 '5<(56 3(5 758&.
Specifications MDG-75 (Hot Surface Ignition) NOTE: Manufacturer reserves the right to make changes in specifications at any time, without notice or obligation.
B. COMPONENT IDENTIFICATION 1. Dryer Front View Illus. No.
2. Dryer Rear View Illus. No. 1 2* 3 4 5 6 7 8 Description Heating Unit Electric Service Relay Box Tumbler Bearing Mount Assembly Idler Bearing Mount Assembly Blower Motor Assembly Leveling Leg (rear) Basket (Drive) Motor Assembly (Reversing Models Only) Dryer Exhaust * Electric service connections for Gas Models are made in this box.
SECTION III INSTALLATION 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: National Fuel Gas Code ANSI.Z223.1-LATEST EDITION or National Electric Code ANSI/NFPA NO. 70-LATEST EDITION. A. LOCATION REQUIREMENTS Before installing the dryer, be sure the location conforms to local codes and ordinances.
B. UNPACKING/SETTING UP Remove protective shipping material (i.e., plastic wrap, or optional shipping box) from dryer. IMPORTANT: Dryer must be transported and handled in an upright position at all times. The dryer can be moved to its final location while still attached to the skid or with the skid removed. To un-skid the dryer, locate and remove the four (4) bolts securing the base of the dryer to the wooden skid.
C. DRYER ENCLOSURE REQUIREMENTS Bulkheads and partitions should be made of noncombustible materials and must be located a minimum of 12-inches (18-inches or more is recommended for ease of installation, maintenance , and service) above the dryer outer top, except along the front of the dryer which may be partially closed in if desired. The clearance between the bulkhead header and the dryer must be a minimum of four (4) inches and must not extend more than four (4) inches to the rear of the front.
D. FRESH AIR SUPPLY When the dryer is operating, it draws in room air, heats it, passes this air through the basket (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 adversely affected. Ignition problems and sail switch "fluttering" problems may result, as well as premature motor failure from overheating.
E. EXHAUST REQUIREMENTS 1. General Exhaust Duct Work Information Exhaust duct work should be designed and installed by a qualified professional. Improperly sized duct work will create excessive back pressure which results in slow drying, increased use of energy, overheating of the dryer, and shutdown of the burner by the airflow (sail) switches, burner hi-limits, or basket (tumbler) hi-heat thermostats. CAUTION: DRYER MUST BE EXHAUSTED TO THE OUTDOORS.
NOTE: Where the exhaust duct work passes through a wall, ceiling, or roof made of combustible materials, the opening must be 2-inches larger (all the way around) than the duct. The duct must be centered within this opening. a. Outside Duct Work Protection 1) To protect the outside end of horizontal duct work from the weather, a 90° elbow bent downward should be installed where the exhaust exits the building.
IMPORTANT: For extended duct work runs, the cross section area of the duct work can only be increased to an extent. When the duct work approaches the maximum limits noted in this manual, a professional heating venting air conditioning (HVAC) firm should be consulted for proper venting information. ALL duct work should be smooth inside with no projections from sheet metal screws or other obstructions which will collect lint.
17
F. ELECTRICAL INFORMATION 1. Electrical Requirements It is your responsibility to have ALL electrical connections made by a properly licensed and competent electrician to assure that the electrical installation is adequate and conforms with local and state regulations or codes. In the absence of such codes, ALL electrical connections, material, and workmanship must conform to the applicable requirements of the National Electrical Code ANSI/NFPA NO.70-LATEST EDITION.
2. Electrical Service Specifications a. Gas ONLY M DG-75 (GAS) ,03257$17 9$& DQG 9$& $5( 127 7+( 6$0( :KHQ RUGHULQJ VSHFLI\ H[DFW YROWDJH 127( $ )XVH UDWLQJV DUH GXDO HOHPHQW WLPH GHOD\ FXUUHQW OLPLWLQJ FODVV 5. RU 5.
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 Electric Code ANSI/NFPA NO. 70-LATEST EDITION. The ground connection may be to a proven earth ground at the location service panel. For added personal safety, when possible, it is suggested that a separate ground wire (no.
Actual electrical wire connections are made to the L1 and L2 terminals of the motor contactor located in the rear service box mentioned above. The ground connection is also made to the copper lug also provided in this box. 6 3 ,1*/( +$6( %ODFN 3RVLWLYH ( /(&75,&$/ :KLWH 1HXWUDO & 211(&7,216 / ($'6 *UHHQ *URXQG RU / If local codes permit, power to the dryer can be made by the use of a flexible U.L.
The only electrical input connections to the dryer are the 3-phase (3ø) power leads (L1, L2, L3, and sometimes neutral) and ground. Single-phase (1ø) power for the control circuit is done internally to the dryer. No single-phase (1ø) input connection is required on a 3-phase (3ø) dryer. For gas dryers manufactured for operation at 3-phase (3ø), the electrical connections are made at the power distribution block located in the service box at the rear, upper left corner of the dryer.
3) 3-Phase (3ø) Wiring Connections or Hookup (for Reversing Models Only) The electrical connections on ALL 3-phase (3ø) gas dryers dryers are made into the rear service box located at the upper left area of the dryer. IMPORTANT: A separate circuit serving each dryer must be provided. If local codes permit, power to a gas dryer can be made by the use of flexible U.L. listed power cord/pigtail (wire size must conform to rating of dryer), or the dryer can be hard wired directly to the service breaker panel.
G. GAS INFORMATION It is your responsibility to have ALL plumbing connections made by a qualified professional to assure that the gas plumbing installation is adequate and conforms with local and state regulations or codes. In the absence of such codes, ALL plumbing connections, materials, and workmanship must conform to the applicable requirements of the National Fuel Gas Code ANSI Z223.1-LATEST EDITION.
2. Technical Gas Data a. Gas Specifications 7<3( 2) * $6 1 0DQLIROG 3UHVVXUH ,QOLQH 3UHVVXUH / $785$/ , 4 8, ' 3 52 3 $1 ( LQFKHV : & LQFKHV : & LQFKHV : & LQFKHV : & 0H D V XUH G D W R XWOH W VLG H R I JD V YD OYH S UH V VXU H WD S ZKH Q JD V YD OYH LV R Q b. Gas Connections: Inlet connection ------------ 3/4-inch N.P.T. Inlet supply size ------------ 3/4-inch N.P.T.
3. Piping/Connections ALL components/materials must conform to National Gas Code specifications. It is important that gas pressure regulators meet applicable pressure requirements and that gas meters be rated for the total amount of ALL the appliance BTU's being supplied. The dryer is provided with a 3/4" N.P.T. inlet pipe connection located at the right side of the base of the dryer. The minimum pipe size (supply line) to the dryer is 3/4" N.P.T.
Consistent gas pressure is essential at ALL gas connections. It is recommended that a 3/4-inch pipe gas loop be installed in the supply line serving a bank of dryers. An in-line pressure regulator must be installed in the gas supply line (header) if the (natural) gas pressure exceeds 12.0 inches of water column (W.C.) pressure. NOTE: A water column (W.C.) test pressure of a consistent 3.5 -inches for natural gas and a consistent of 10.5-inches for L.P.
H. PREPARATION FOR OPERATION/START-UP The following items should be checked before attempting to operate the dryer: 1. Read ALL "CAUTION," "WARNING," 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 affixed to the back side of the top front control/service door. In the case of 208 VAC or 230/240 VAC, THE SUPPLY VOLTAGE MUST MATCH THE ELECTRIC SERVICE EXACTLY. 3.
I. PREOPERATIONAL TESTS 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. Turn on electric power to the dryer. a. Open ALL shut-off valves - Gas Models ONLY 2. Refer to the Operating Instructions for starting your particular model dryer.
3.Make a complete operational check of ALL safety related circuits: a. Door Switch(es) b. Hi-Limit thermostats c. Sail switch - Gas Models NOTE: To check for proper sail switch operation (for Gas Models), open the main door and while holding main door switch plunger in, start dryer. The dryer should start but the heat circuit should not be activated (on).
7. Reversing Models ONLY Basket (tumbler) dryer should never be operated with less than a 30 lb. load (dry weight). The size of the load will affect the coast-down and dwell (stop) times. The basket (tumbler) must come to a complete stop before starting in opposite direction. a.
K. SHUT DOWN INSTRUCTIONS If the dryer is to be shut down (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 heat supply: a. GAS MODELS ... discontinue the gas supply. 1) SHUT OFF external gas supply shut-off valve. 2) SHUT OFF internal gas supply shut-off valve located in the gas valve burner area.
SECTION IV SERVICE/PARTS INFORMATION A. SERVICE 1. Service must be performed by a qualified trained technician, service agency, or gas supplier. If service is required, contact the distributor from whom the MAYTAG equipment was purchased. If the distributor cannot be contacted or is unknown, contact the MAYTAG Customer Service Department for a distributor in your area.
SECTION V WARRANTY INFORMATION A. RETURNING WARRANTY CARD(S) 1. Before any dryer leaves the factory test area, a warranty card (Part No. 112252) 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 better serve you, if you file a warranty claim. a. If a warranty card (Part No. 112252) did come with your dryer, contact the Manufacturer's Warranty Department. 2.
SECTION VI ROUTINE MAINTENANCE A. CLEANING A program or schedule should be established for periodic inspection, cleaning, and removal of lint from various areas of the dryer, as well as throughout the duct work system. The frequency of cleaning can best be determined from experience at each location. Maximum operating efficiency is dependent upon proper air circulation. The accumulation of lint can restrict this air flow.
90 DAYS 1. Remove lint from around basket (tumbler), drive motors, and surrounding areas. 2. Remove lint from gas valve burner area with a dusting brush or vacuum cleaner attachment. 3. Clean any lint accumulation in and around both the blower and drive motor casing openings. NOTE: To prevent damage, avoid cleaning or touching ignitor and flame-probe assembly. EVERY 6 MONTHS Inspect and remove lint accumulation in customer furnished exhaust duct work system and from dryers internal exhaust ducting.
B. ADJUSTMENTS 7 DAYS AFTER INSTALLATION and EVERY 6 MONTHS THEREAFTER Inspect bolts, nuts, screws, (bearing set screws), non-permanent gas connections (unions, shut-off valves, orifices, and grounding connections). Motor and drive belts should be examined. Cracked or seriously frayed belts should be replaced. Tighten loose V-belts when necessary. Complete operational check of controls and valves.
SECTION VII PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT COMPONENTS 1. Microprocessor (computer) Board a. Upon completing installation of the replacement microprocessor (computer) board, reestablish power to the dryer. b. Start the drying cycle by pressing any of the preset cycle in letters "A thru F". c. Verify that the motors and heat indicator dots in the microprocessor (computer) L.E.D. (light emitting diode) are on. (Refer to the illustration below.
d. Verify that the motors heat, and door indicator lights on the back side of the microprocessor (computer) board are lit. (Refer to the illustration below.) e. Open the main door. The dryer must stop and ALL output indicator lights on the back side of the microprocessor (computer) board must go out. (Refer to illustration above.) f. Try to restart the dryer with the main door open. g. The microprocessor (computer) board's L.E.D. (light emitting diode) display must read "DOOR." h.
2. Hot Surface Ignition (HSI) System (for Gas Models Only) a. Upon completing installation of the replacement Hot Surface Ignition (HSI) module, reestablish power to the dryer. b. The Hot Surface Ignition (HSI) module's "red" indicator light will light up for approximately 5seconds (self check routine). If the Hot Surface Ignition (HSI) module's "red" indicator light stays on or flashes continuously, then the HSI module is wired incorrectly or has failed. c. Start the drying cycle. d.
SECTION VIII REVERSING TIMER SPIN AND DWELL ADJUSTMENTS Dual timer models with "reversing option" have an electric reversing timer in the electric service box which is located in the upper 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 (as noted in the illustration below).
SECTION IX TECHNICAL INFORMATION A. DATA LABEL Contact MAYTAG When contacting MAYTAG certain information is required to insure proper service and parts information from the manufacturer. This information is on the data label located on the inside of the control door. When contacting MAYTAG please have the model number and serial number available.
THE DATA LABEL 1. MODEL DRYER The model number is a number which describes the size of the dryer and the type of heat (gas or electric). 2. SERIAL NUMBER The serial number allows Maytag Corporation and the manufacturer to gather information on your particular dryer. 3. MANUFACTURING CODE NUMBER The manufacturing code number is a number issued by manufacturer which de scribes ALL possible options on your particular model. 4.
SECTION X TROUBLESHOOTING WARNING: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and THE GAS SUPPLY BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) STANDARDS. The information provided will help isolate the most probable component(s) associated with the difficulty described.
0,&52352&(6625 &20387(5 02'(/6 &217,18(' ,7(0 0 & ,&52352&(6625 .(<3$' ( 175,(6 0 & ,&52352&(6625 . : 1 $ $ . : 2 $ & ( / 8 21752//(5 (<%2$5' 21752//(5 .
MICROPROCESSOR (COMPUTER) MODELS A. No L.E.D. (light emitting diode) display (for microprocessor [computer] models ONLY)... 1. Service panel fuse blown or tripped breaker. 2. Blown control circuit L1 or L2 1/2-amp (Slo Blo) fuse. 3. Failed microprocessor controller (computer). 4. Failed control step down transformer (for 380 volts or higher models ONLY). B. Drive motor is not operating (does not start)... 1. Microprocessor controller (computer) motor indicator dot and relay output L.E.D.
E. Blower and Fan motor is not operating (does not start)... 1. Microprocesssor controller (computer) motor indicator dot and relay output L.E.D. (light emitting diode) indicator dots are on ... a. Failed blower (impellor and fan) motor contactor (relay). b. Failed arc suppressor (A.S.) board. c. Failed blower (fan and impellor) motor. 2. Microprocessor controller (computer) "door" L.E.D. is on but motor output L.E.D. indicator is off... a. Failed microprocessor controller (computer). F.
b. Loose connection in main door switch circuit. J. Microprocessor (computer) L.E.D. (light emitting diode) display reads "dSFL" continuously and the buzzer (tone) sounds every 30 seconds... 1. Fault in microprocessor heat sensing circuit. a. Blown "dSFL" 1/8-amp fuse on the microprocessor controller (computer). b. Failed microprocessor temperature sensor. c. Failed microprocessor controller (computer). d.
O. Microprocessor controller (computer) locks up and L.E.D. (light emitting diode) display reads erroneous message(s) or only partial segments... 1. Transient power voltage spikes...disconnect the electrical power to the dryer, wait one (1) minute and reestablish power to the dryer. If problem is still evident ... a. Failed microprocessor controller (computer). b. Failed keyboard label (touchpad) assembly. P.
T. Heating unit is not operating (no heat)...no voltage at heating unit (i.e., Gas Model - HSI module, Electric Model - electric oven contactor when dryer is first started and both the heat indicator dot and the "HEAT" output L.E.D. (light emitting diode) is on... GAS MODELS ... 1. Fault in sail switch circuit ... a. Sail switch is out of adjustment or has failed. b. Sail switch damper is not closing or is fluttering. 1) Lint screen is dirty. 2) Restriction in the exhaust. 3) No exhaust air flow ...
U. Heating unit is not operating (no heat)...no voltage at heating unit (i.e., Gas Model) when dryer is first started and both the heat indicator dot and the "HEAT" output L.E.D. (light emitting diode) is not on... 1. Failed microprocessor controller (computer). V. Heating unit is not operating (no heat)...no voltage at heating unit (i.e., Gas Model - HSI module) GAS MODELS ... 1. Fault in Hot Surface Ignition (HSI) system ... a. Ignitor glows, but no ignition and HSI module "LOCKS-OUT" ("red" L.E.D.
W. Dryer operates but is taking too long to dry... 1. Exhaust duct work run is too long or is undersized...back pressure cannot exceed 0.3 inches water column (W.C.). 2. Restriction in duct work ... a. Dryer back draft damper is sticking partially closed. b. Restriction/obstruction in duct work ... 1) Check duct work from the dryer all the way to the outdoors. 3. Insufficient make-up air. 4. Impellor (fan and blower) is rotating in the wrong direction only (for 3ø Models ONLY). 5.
NOTE: Lint accumulation on the sensor bracket can act as an insulator which will affect the accuracy of the automatic drying cycle. X. At the completion of the "AUTO" drying/cooling cycle, the load is coming out over dried... 1. Percent of dryness (dryness level) of the cycle selected is too high. 2. Factor "A" and Factor "B" is not set correctly or Factor "B" has to be adjusted for adverse local conditions. Y. At the completion of the "AUTO" drying/cooling cycle, the load is coming out still damp... 1.
Z. Main burners are burning with a yellow flame (for Gas Models ONLY)... 1. Poor air and gas mixture (too much gas or not enough air) at the burner ... a. Not enough make-up air. b. Restriction in the exhaust. c. Gas pressure is too high. d. Impellor (fan and blower) is rotating in the wrong direction only (for 3ø Models ONLY). e. Burner orifice size (D.M.S. [drill material size]) too large for application (i.e., high elevation). AA. Condensation on main door glass... 1.
7. V-belts too tight or too loose. 8. Tumbler bearing set screws are loose. 9. Failed motor bearing. TIMER MODELS A. Dryer will not start...both drive motor and blower (impellor/fan) motor are not operating and indicator light is off... 1. Service panel fuse blown or tripped breaker. 2. Dryer control circuit L1 or L2 1/2-amp (Slo Blo) fuse is blown. 3. Open in main door switch ... a. Main door is not closed all the way. b. Main door switch is out of proper adjustment. c. Failed main door switch. d.
D. Drive motor operates okay for a few minutes, then stops and will not restart... 1. Motor is overheating and tripping out on internal overload protector ... a. Motor air vents clogged with lint. b. Low voltage to motor. c. Failed motor. d. Tumbler (basket) is binding... check for an obstruction. e. Failed idler bearings or tumbler bearings. E. Blower/Fan motor is not operating (does not start)... 1. Failed blower (impellor and fan) motor contactor (relay). 2. Failed blower (fan and impellor) motor. F.
b. Sail switch damper is not closing or is fluttering. 1) Lint screen is dirty. 2) Restriction in the exhaust. 3) No exhaust air flow ... a) Failed impellor (fan and blower). b) Fault in blower (impellor and fan) motor circuit (for Reversing Models ONLY). 2. Failed burner hi-limit. 3. Failed lint chamber sensor bracket basket (tumbler) hi-limit switch. I. No heat)...no voltage at heating unit (i.e., Gas Model - Hot Surface Ignition [HSI] module) GAS MODELS ... 1. Fault in hot surface ignition system ... a.
J. Dryer operates but is taking too long to dry... 1. Exhaust duct work run is too long or is undersized... back pressure cannot exceed 0.3 inches water column (W.C.). 2. Restriction in duct work ... a. Dryer back draft damper is sticking partially closed. b. Restriction and obstruction in duct work ... 1) Check duct work from the dryer all the way to the outdoors. 3. Insufficient make-up air. 4. Impellor (fan and blower) is rotating in the wrong direction only (for 3ø Models ONLY). 5.
3) Sail switch is fluttering ... a) Lint screen is dirty or is not being cleaned often enough. b) Restriction in the exhaust. 4) Failed burner hi-limit... opens at incorrect temperature. 5) Gas supply may have too low a heating value.
NOTE: Lint accumulation on the sensor bracket can act as an insulator which will affect the accuracy of the Automatic Drying Cycle. K. Main burners are burning with a yellow flame (for Gas Models ONLY)... 1. Poor air and gas mixture (too much gas or not enough air) at the burner ... a. Not enough make-up air. b. Restriction in the exhaust. c. Gas pressure is too high. d. Impellor (fan and blower) is rotating in the wrong direction only (for 3ø Models ONLY). e. Burner orifice size (D.M.S.
3. Loose basket (tumbler) tie rod. 4. Basket (tumbler) out of adjustment, or adjustment bolts (hardware) are loose. 5. Failed basket (tumbler) support. 6. Loose motor mount. 7. Failed idler, basket (tumbler), or blower drive bearings. 8. V-belts too tight or too loose. 9. Bearing set screws (either basket [tumbler], idler, or blower shaft) are loose. 10. Failed motor bearing.
Part No.
