Maytag MD-31 Operator's Manual

020800JEV/abe ADC Part No. 113024MD-170Installation/Operator's ManualFor replacement parts, contact the distributor from which the dryerwas purch

6SECTION IISPECIFICATIONS / COMPONENT IDENTIFICATIONA. SPECIFICATIONS (GAS and STEAM)GasSteamIMPORTANT: Gas dryers and steam dryers must be provided

7NOTE: Operating height of steam dryer is 101-inches (256.54 centimeters).NOTE: The manufacturer reserves the right to make changes in specifications

8B. COMPONENT IDENTIFICATION1. Dryer Front ViewIllus. No. Description1 Microprocessor Control/Keyboard (Touchpad) Panel Assembly (Controls)2 Contro

92. Dryer Rear ViewIllus. No. Description1 Basket (Drive) Motor Assembly2 Blower Motor Mount Assembly3 Idler Bearing Mount Assembly4 Tumbler Bearing

10SECTION IIIINSTALLATION PROCEDURESInstallation should be performed by competent technicians in accordance with local and state codes. In theabsenc

11B. UNPACKING/SETTING UPRemove protective shipping material (i.e., plastic wrap, and/or optional shipping box) from dryer.IMPORTANT: Dryer must be t

125) Lift the console (module) off of the dryer base.IMPORTANT: The dryer must be transported and handled in an upright position at all times.2) Remov

13NOTE: When fire sprinkler systems are located above the dryers, a minimum of 18-inches above thedryer console (module) is required. Dryers may be p

14IMPORTANT: Make-up air must be provided from a source free of dry cleaning solvent fumes.Make-up air that is contaminated by dry cleaning solvent fu

15E. EXHAUST REQUIREMENTS1. General Exhaust Duct Work InformationExhaust duct work should be designed and installed by a qualified professional. Im

Retain This Manual In A Safe Place For Future ReferenceDATE OF PURCHASE MODEL NO.DISTRIBUTORS NAMESerial Number(s)MD-170IMPORTANT NOTE TO PURCHASERI

16a. Outside Duct Work Protection1) To protect the outside end of horizontal duct work from the weather, a 90° elbow bent downwardshould be installed

172.Single Dryer VentingWhere possible, it is suggested to provide a separate exhaust duct for each dryer. The exhaust ductshould be laid out in such

18IMPORTANT: For extended duct work runs, the cross section area of the duct can only be increasedto an extent. Maximum proportional duct work runs c

19The main duct may be any shape or cross-sectional area, so long as the minimum cross section area isprovided. The illustrations on page 20 show the

20

21F. ELECTRICAL INFORMATION1. Electrical RequirementsIt is your responsibility to have ALL electrical connections made by a properly licensed and com

222.Electrical Service SpecificationsIMPORTANT: The dryer must be connected to the electric supply shown on the data label that isaffixed to the back

233.Electrical ConnectionsNOTE: A wiring diagram is included with each dryer and is affixed to the rear upper right guard/panelof the dryer.The only e

244.GroundingGrounding (earth) connections must be provided and installed in accordance with state and local codes. Inthe absence of the codes, groun

25G. GAS INFORMATIONIt is your responsibility to have ALL plumbing connections made by a qualified professional to assure that the gasplumbing instal

IMPORTANTYOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and THE GASSUPPLY BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINETO ALLOW ACCESS

262.Technical Gas Dataa. Gas Specificationsb. Gas Connections:Inlet connection ---- 1-inch N.P.T.Inlet supply size ----- 1-inch N.P.T. (minimum)Btu/h

273.Piping/ConnectionsALL components/materials must conform to National Fuel Gas Code Specifications. It is important thatgas pressure regulators mee

28IMPORTANT: The dryer and its individual shut-off valve must be disconnected from the gas supplysystem during any pressure testing of that system at

29H. STEAM INFORMATIONIt is your responsibility to have ALL steam plumbing connections made by a qualified professional to assure thatthe installatio

30STEAM DAMPER SYSTEMa. The pressure of the condensate in the steam supply will cause water hammer and subsequent heatexchanger (steam coil) failure.

314.Steam Damper ConnectionsThe MDS-170 steam dryer is manufactured with a pneumatic (piston) damper system which requires anexternal supply of compre

326. Steam Damper Piston (Flow Control) Operation AdjustmentAlthough the damper operation was tested and adjusted prior to shipping at 80 psi, steam d

33I. PREPARATION FOR OPERATION/START-UPThe following items should be checked before attempting to operate the dryer;1. Read ALL "CAUTION,"

34J. PREOPERATIONAL TESTSALL dryers are thoroughly tested and inspected before leaving the factory. However, a preoperational testshould be performe

354. Check to insure that the tumbler (basket) starts in the clockwise (CW) direction. Additionally, check thedirection of the blower motor impellor/

WARNINGThe dryer must never be operated with any of the back guards, outer tops, or servicepanels removed. PERSONAL INJURY or FIRE COULD RESULT.IMPOR

367. A reversing tumbler (basket) dryer should never be operated with less than a 60 lb. (27 kg) load (dryweight). The size of the load will affect t

37L. COMPRESSED AIR REQUIREMENTSThe model MD-170 dryer requires an external supply of compressed air of 2.5 cfm at 80 PSI (552 kPa). ForSteam Models,

38SECTION IVSERVICE/PARTS INFORMATIONA. SERVICE1. Service must be performed by a qualified trained technician, service agency, or gas supplier. If

39SECTION VWARRANTY INFORMATIONA. RETURNING WARRANTY CARD(S)1. Before any dryer leaves the manufacturer, a warranty card is placed on the back sid

40SECTION VIROUTINE MAINTENANCEA. CLEANINGA program or schedule should be established for periodic inspection, cleaning, and removal of lint from va

4190 DAYSRe-grease the two (2) 1-3/8-inch bearings that support the impellor/fan shaft. Use Shell Alvania #3 greaseor its equivalent. Impellor/fan s

42B. ADJUSTMENTS7 Days After Installation and Every 6 Months ThereafterInspect bolts, nuts, screws (bearing set screws), non-permanent gas connection

43SECTION VIITROUBLESHOOTINGIMPORTANT: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY andTHE GAS SUPPLY or THE STEAM SUPPLY BEFORE ANY COVERS or

44continued from page 433. Failed drive motor.4. Failed microprocessor controller (computer).C. Drive motor (reversing) operates in one direction only

45G. Both drive motor and blower (impellor/fan) motor are not operating (do not start)...microprocessorcontroller (computer) motor indicator dots and

Table of ContentsSECTION IIMPORTANT INFORMATION ... 3A. RECEIVING and HAND

46K. Microprocessor controller (computer) display reads "door" and microprocessor controller(computer) "door" L.E.D. indicator is

47Q. Dryer stops during a cycle, microprocessor controller (computer) buzzer (tone) sounds for5-seconds, and then the L.E.D. (light emitting diode) di

48continued from page 47a) Failed impellor (fan/blower) "squirrel cage."b) Loose or failed impellor (fan/blower) assembly drive belts.c) Fau

49continued from page 48c. Ignitor does not spark and Direct Spark Ignition (DSI) module "LOCKS-OUT" ("red" L.E.D. [lightemitting

50continued from page 496. Inadequate air flow...a. Impellor (blower/fan) "squirrel cage" failure.b. Loose impellor (blower/fan) "squir

51continued from page 50f. Dirty steam coil ...1) Fins clogged with lint.g. Steam damper system not functioning properly...1) Damper is sticking close

52Z. Dryer or scraping noise at tumbler (basket) area...1. Check for object caught in tumbler (basket)/wrapper area.2. Tumbler (basket) is out of prop

53continued from page 52c. Failed lint drawer switch.d. Failed main door switch.e. Broken connection/wire in main door or lint drawer switch circuit.4

54continued from page 53c. Failed motor.d. Failed blower (impellor/fan) drive shaft bearings.NOTE: V-belts to tight or bearings not lubricated often e

55STEAM MODELS1. Tripped lint chamber sensor bracket tumbler (basket) manual reset hi-limit switch circuit.2. Failed temperature selection switch or c

SECTION VIITROUBLESHOOTING ... 43SECTION VIIIREVERSING TIMER S

56STEAM MODELS1. No (external) compressed air (80 PSI [552 kPa) required) to steam damper solenoid.2. Flow control valve is not adjusted correctly ...

57continued from page 56b. Poor air/gas mixture (too much gas or not enough air) at burner...yellow or poor flame pattern ...1) Not enough make-up air

58continued from page 5810. Failed microprocessor controller (computer controlled models Only)...temperature calibration isinaccurate.11. Failed micro

59N. Excessive noise and/or vibration...1. Dryer is not leveled properly.2. Impellor (fan/blower) "squirrel cage" out of balance ...a. Exces

60SECTION VIIIREVERSING TIMER SPIN/DWELL ADJUSTMENTSTimer models have an electric reversing timer in the electric service box which is located in the

61SECTION IXDATA LABEL LOCATION / INFORMATIONData LabelWhen contacting Maytag Company, certain information is required to insure proper service/parts

62THE DATA LABEL1. MODEL DRYERThe model number is a manufacturer's number which describes the size of the dryer and the type of heat(gas, electri

63SECTION XPROCEDURE FOR FUNCTIONAL CHECK OFREPLACEMENT COMPONENTS1. Microprocessor (computer) Boarda. Upon completing installation of the replacemen

64e. Open main door. The dryer must stop and ALL output indicator lights on the back side of the micro-processor (computer) board must go out.f. Try

652.For models manufactured with Johnson Controls DSI (Direct Spark Ignition)Module (G760)Theory Of Operation;Start the drying cycle. When the gas bu

3SECTION IIMPORTANT INFORMATIONA. RECEIVING and HANDLINGThe dryer is shipped in a protective stretch wrap cover with protective cardboard corners an

66I M P O R T A N TMANUAL RESET HI-LIMIT INSTRUCTIONSFOR DUAL TIMER OR PHASE 5 WITHOUT HEAT FAULT(GAS MODELS ONLY) This dryer was manufactured

67I M P O R T A N TMANUAL RESET HI-LIMIT INSTRUCTIONSFOR DUAL TIMER OR PHASE 5 WITHOUT HEAT FAULT(STEAM MODELS ONLY)This dryer was manufactured with a

Part No. 113024 1- 02/16/00-25 2- 02/25/00-250

4B. SAFETY PRECAUTIONSWARNING: For your safety, the information in this manual must be followed to minimize the risk offire or explosion or to preven

57. A program should be established for the inspection and cleaning of lint in the heating unit area, exhaust ductwork, and inside the dryer. The fre