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American Dryer Corp. ML-75HS Installation Manual Download Page 34

30

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 pressure.

NOTE

: A water column test pressure of 3.5 inches for natural gas and 10.5 inches for L.P. (liquid

propane) dryers is required at the gas valve pressure tap of  each dryer for proper and safe
operation.

A  1/8" N.P.T. plugged tap, accessible for a test gauge connection, 

must be

 installed in the main gas supply

line immediately upstream of each dryer.

IMPORTANT

: Pipe joint compounds that resist the action of natural gas and L.P. gas 

must be

 

used.

IMPORTANT

:  Test 

 ALL

 connections for leaks by brushing on a soapy water solution (liquid

detergent works well).

WARNING:  NEVER TEST FOR LEAKS WITH A FLAME!!!

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.

IMPORTANT

: The dryer and its individual shut-off 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

shut-off valve during any pressure test of the gas supply system at test pressures equal to or

less than 1/2 psig (3.5  kPa).

H. STEAM INFORMATION

It is your responsibility to have 

ALL

 plumbing connections made by a qualified professional to assure that the

steam plumbing installation is adequate and conforms with local and state regulations or codes.

IMPORTANT

: Failure to comply with the requirements stipulated in this manual can result in

component failure which will VOID THE WARRANTY.

NOTE

: The MLS-75 is manufactured with a pneumatic (piston) damper system which requires an

external supply of air (80 PSI +/- 10 PSI).

1. Steam Coil PH Level

The normal PH level for copper type steam coils 

must be

 maintained between a value of 8.5 to 9.5.

For  steel  type  steam  coils  the  PH  level 

must be

  maintained  between  a  value  of  9.5  to  10.5.    These

limits are set to limit the acid attack of the steam coils.

IMPORTANT

: Coil failure due to improper PH level will VOID THE WARRANTY.

Summary of Contents for ML-75HS

Page 1: ...ll the firedepartment Installation and service must be performed by a qualifiedinstaller serviceagencyorthegas supplier AVERTISSEMENT Assurez vous de bien suivre les instructions données dans cette noticepourréduireauminimum lerisque d incendieoud explosionoupourévitertout dommagematériel touteblessureoulamort Ne pas entreposer ni utiliser d essence ni d autresvapeursouliquidesinflammablesdans le ...

Page 2: ...in a prominentlocationnearthedryer American Dryer Corporation 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 m...

Page 3: ...ESUPERVISEDIFNEARDRYER S INOPERATION DRYER S SHOULDNEVERBELEFTUNATTENDEDWHILEINOPERATION CAUTION FOR YOUR SAFETY DONOTDRYMOPHEADSINTHEDRYER DONOTUSEDRYERINTHEPRESENCEOFDRYCLEANINGFUMES WARNING UNDER NO CIRCUMSTANCES should the door switch or the heat circuit devices ever be disabled Caution Label all wires prior to disconnection when servicing controls Wiring errors can cause improper operation At...

Page 4: ...n the equipment and or specified in the installation operator s manual included with the dryer Dryer s must not be installed or stored in an area where it will be exposed to water and or weather The wiring diagram for the dryer is located in the front electrical control box area DRYER MUST NEVER BE OPERATEDWITHOUTTHE LINTFILTER SCREEN IN PLACE EVENIFANEXTERNALLINTCOLLECTIONSYSTEMISUSED WARNING ...

Page 5: ...SettingUp 11 C DryerEnclosureRequirements 12 D Fresh Air Supply 13 E ExhaustRequirements 14 F ElectricalInformation 19 G GasInformation 27 H SteamInformation 30 I Preparation For Operation Start up 36 J Preoperational Tests 37 K Preoperational Instructions 39 L ShutDownInstructions 40 SECTION IV SERVICE PARTS INFORMATION 41 A Service 41 B Parts 41 SECTION V WARRANTY INFORMATION 42 A ReturningWarra...

Page 6: ...AINTENANCE 44 A Cleaning 44 B Adjustments 45 SECTION VII PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT COMPONENTS 46 SECTION VIII REVERSING TIMER SPIN DWELL ADJUSTMENTS 49 SECTION IX TECHNICAL INFORMATION 50 Data Label 50 ...

Page 7: ... the number received and the number refused must be noted on the receipt 4 If you determine that the dryer was damaged after the trucker has left your location you should call the delivering carrier s freight terminal immediately and file a claim The freight company considers this concealed damage This type of freight claim is very difficult to get paid and becomes extremely difficult when more th...

Page 8: ... call your gas supplier from a neighbor s phone Follow the gas supplier s instructions f If you cannot reach your gas supplier call the fire department 4 Installation and service must be performed by a qualified installer service agency or gas supplier 5 Dryer s must be exhausted to the outdoors 6 Although ADC produces a very versatile machine there are some articles that due to fabric composition...

Page 9: ... Articles left in the dryer after the drying and cooling cycles have been completed can create a fire hazard 12 DO NOT operate steam dryers with more than 125 PSI steam pressure Excessive steam pressure can damage steam coil and or harm personnel 13 Replace leaking flexible hoses or other steam fixtures immediately DO NOT operate the dryer with leaking flexible hoses PERSONAL INJURY MAY RESULT 14 ...

Page 10: ...BLE 120 460v 1Ø 3Ø 50 60 Hz APPROX WEIGHT Uncrated 757 lbs 343 4 kg APPROX WEIGHT Crated 807 lbs 366 1 kg AIRFLOW 1 350 cfm 38 23 cmm COMPRESSED AIR VOLUME 75 cfh 02 cmh AIR CONNECTION 1 8 F P T 318 cm STEAM CONSUMPTION BOILER HP NORMAL LOAD 238 7 lbs hr 108 3 kg hr 7 OPERATING STEAM PRESSURE STEAM SUPPLY STEAM SUPPLY 125 psi max 8 6 kg sq cm 1 2 54 cm 1 2 54 cm SECTION II SPECIFICATIONS COMPONENT...

Page 11: ...7 NOTE ADC RESERVES THE RIGHT TO MAKE CHANGES IN SPECIFICATIONS AT ANY TIME WITHOUT NOTICE or OBLIGATION Specifications MLG 75HS MLE 75 MLS 75 ...

Page 12: ...DRYER FRONT VIEW Illus No Description 1 Controls 2 Control top access Door Assembly 3 Main Door Assembly 4 Lint Compartment Area lint screen located behind door 5 Data Label and Installation Label located behind control service door ...

Page 13: ...it 2 1 8 Compressed Air Supply Inlet behind Electric Service Relay Box for steam units ONLY 3 Electric Service Relay Box 4 Tumbler Bearing Mount Assembly 5 Idler Bearing Mount Assembly 6 Blower Motor Assembly 7 Leveling Leg rear 8 Basket Drive Motor Assembly Reversing Models ONLY 9 Dryer Exhaust Electric service connections for Gas Steam Models are made in this box ...

Page 14: ...floor area that the dryer is to rest on 2 The dryer must not be installed or stored in an area where it will be exposed to water and or weather 3 The dryer is for use in noncombustible locations 4 Provisions for adequate air supply must be provided as noted in this manual refer to Fresh Air Supply in Section D 5 Clearance provisions must be made from combustible construction as noted in this manua...

Page 15: ...lightly lower ALL four 4 leveling legs so that the dryer will slide on the legs instead of the base frame To increase bearing life and improve efficiency the dryer should be tilted slightly to the rear The basket tumbler is supported during shipping by a wooden block REMOVE THIS BLOCK BEFORE STARTING THE DRYER IMPORTANT For microprocessor computer models this wooden block must be removed before co...

Page 16: ...e the dryers a minimum of 18 inches above the dryer console module is required Dryers may be positioned side wall to side wall however a 1 16 inch minimum allowance is required between dryers or wall for ease of installation and maintenance Allowances must be made for the opening and closings of the control door and the lint door C DRYER ENCLOSURE REQUIREMENTS Bulkheads and partitions should be ma...

Page 17: ... is required for each dryer To compensate for the use of registers or louvers used over the openings this make up air must be increased by approximately thirty three percent 33 Make up air openings should not be located in an area directly near where exhaust vents exit the building It is not necessary to have a separate make up air opening for each dryer Common make up air openings are acceptable ...

Page 18: ...s are used the cross sectional area of the duct work must be increased ALL duct work should be smooth inside with no projections from sheet metal screws or other obstructions which will collect lint When adding ducts the duct to be added should overlap the duct to which it is to be connected ALL duct work joints must be taped to prevent moisture and lint from escaping into the building Inspection ...

Page 19: ...de of opening of exhaust duct work 2 Single Dryer Venting Where possible it is suggested to provide a separate exhaust duct for each dryer The exhaust duct should be laid out in such a way that the duct work travels as directly as possible to the outdoors with as few turns as possible It is suggested that the use of 90 turns in the ducting be avoided use 30 and or 45 angles instead The shape of th...

Page 20: ...rategic points in the exhaust duct work for periodic inspection and clean out of lint from the duct work NOTE Where the exhaust duct 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 mustbe centered within this opening a Outside Duct Work Protection 1 To protect the outside end of horizontal duct work f...

Page 21: ... elbow is equivalent to an additional fifteen 15 feet IMPORTANT For extended duct work runs the cross section area of the duct work can only be increased to an extent Maximum proportional duct work runs cannot exceed fifteen 15 feet with two 2 elbows When the duck work approaches the maximum limits as noted in this manual a professional HVAC firm should be consulted for proper venting HVAC shouldb...

Page 22: ...18 ...

Page 23: ... EDITION IMPORTANT Failure to comply with these codes or ordinances and or the requirements stipulatedinthismanualcanresultinpersonalinjuryorcomponentfailure NOTE ComponentfailureduetoimproperinstallationwillVOIDTHEWARRANTY Each dryer should be connected to an independently protected branch circuit The dryer must be connected with copper wire only DO NOT use aluminum wire which could cause a fire ...

Page 24: ...ecifications at any time without notice or obligation MLG 75 Gas MLS 75 Steam ELECTRICAL SERVICE SPECIFICATIONS PER DRYER IMPORTANT 208 VAC and 230 240 VAC ARE NOT THE SAME When ordering specify exact voltage NOTE A Fuse ratings are dual element time delay current limiting class RK1 or RK5 ONLY B Circuit breakers are thermal magnetic industrial type ONLY For others calculate verify correct breaker...

Page 25: ...E ADC reserves the right to make changes in specifications at any time without notice or obligation APPROX AMP DRAW IMPORTANT 3 phase figures shown are for a 3 wire service ONLY MLE 75 Electric ELECTRICAL SERVICE SPECIFICATIONS PER DRYER IMPORTANT 208 VAC and 230 240 VAC ARE NOT THE SAME When ordering specify exact voltage NOTE A Fuse ratings are dual element time delay current limiting class RK1 ...

Page 26: ...al connection all the way to the electrical ground If there are any non metallic interruptions such as a meter pump plastic rubber or other insulating connectors they must be jumped out with no 4 copper wire and securely clamped to bare metal at both ends IMPORTANT For personal safety and proper operation the dryer must be grounded Provisions are made for ground connection in each dryer at the ele...

Page 27: ...ef must be installed where the wiring enters the dryer 2 3 Phase 3 Ø Wiring Connections Hookup NON REVERSING MODELS ONLY The electrical connections on ALL three phase 3 Ø gas and steam dryers are made into the rear service box located at the upper left area of the dryer Electrical connections for electrically heated dryers are made in the electric oven area located at the upper rear area of the dr...

Page 28: ... 1Ø input connection is required on a three phase 3Ø dryer For gas and steam dryers manufactured for operation at three 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 The ground connection is made to the copper lug also provided in this box To gain access to the service box contactor the service box...

Page 29: ...can be hard wired directly to the service breaker panel In all cases a strain relief must be installed where the wiring enters the dryer 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 input connection is required on a three phase...

Page 30: ...ngle phase 1 Ø input connection is required on a 3 phase 3 Ø dryer CAUTION The dryer must be grounded A ground lug has been provided for this purpose Input connection wiring must be sized properly to handle the dryer s current draw This information is printed on the dryers data label IMPORTANT A separate circuit serving each dryer must be provided The electrical input connections are made at the e...

Page 31: ...m supply as noted can cause irreparable damage to the gas valve VOIDING THEWARRANTY WARNING FIRE or EXPLOSION COULD RESULT 1 Gas Supply The gas dryer installation must meet the American National Standard National Fuel Gas Code ANSI Z223 1 LATEST EDITION as well as local codes and ordinances and must be done by a qualified professional NOTE Undersizedgaspipingwillresultinignitionproblems slowdrying...

Page 32: ...regulated upstream of the dryer The pressure measured at each gas valve pressure tap must be a consistent 10 5 inches water column There is no regulator or regulation provided in an L P dryer The water column pressure must be regulated at the source L P tank or an external regulator must be added to each dryer D M S DrillMaterialSizeofequivalentsareasfollows Natural Gas 29 1360 Liquid Propane Gas ...

Page 33: ...The minimum pipe size supply line to the dryer is 3 4 N P T For ease in servicing the gas supply line of each dryer must have its own shut off valve The size of the main gas supply line header will vary depending on the distance this line travels from the gas meter or in the case of L P liquid propane gas the supply tank other gas operated appliances on the same line etc Specific information regar...

Page 34: ...rated for the total amount of ALL the appliance BTU s being supplied IMPORTANT The dryer and its individual shut off valve mustbe 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 mustbeisolatedfromthegassupplypipingsystembyclosingitsindividualmanual shut off valve during any pressure test of the...

Page 35: ... b The steam supply piping to the dryer must include a 12 inch rise 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 if they are hard piped to the supply and return mains d Shut off valves for each dryer shou...

Page 36: ...uns of steam supply piping should be pitched 1 4 inch for every one 1 foot back towards the steam supply header causing the condensate in the line to drain to the header Install a bypass trap in any low point to eliminate wet steam IMPORTANT Flexible hose coupling must be used Coil Failure due to hard plumbing connections will VOID THE WARRANTY ...

Page 37: ... service relay box a Air Requirements b Air Connection Air connection to system 1 8 inch N P T c No air regulator or filtration is provided with the dryer External regulation filtration of 80 psi must be provided It is suggested that a regulator filter gauge arrangement be added to the compressed air line just before the dryer connection This is necessary to insure that correct and clean air press...

Page 38: ...viding instant heat to start the drying process When the damper is closed ambient air is drawn directly into the tumbler allowing a rapid cool down Diagram 2 Diagram 1 shows the damper in the heating open mode allowing heat into the tumbler Diagram 2 shows the damper in the cool down closed mode pulling ambient air directly into the tumbler without passing through the coils NOTE With the dryer off...

Page 39: ...ted and adjusted prior to shipping at 80 PSI steam damper operation must be checked before the dryer is put into operation Refer to page 33 for instructions to check steam damper operation If steam damper adjustment is necessary locate the flow control valve and make the necessary adjustments as noted below ...

Page 40: ...ed and adjusted at the factory prior to shipping However each sail switch adjustment must be checked to assure that this important safety control is functioning refer to page 37 for Sail Switch Adjustment 5 GAS MODELS be sure that ALL gas shut off valves are in the open position 6 Be sure ALL side and base panels are on the dryer 7 Check ALL service doors to insure that they are closed and secure ...

Page 41: ...ernal diagnostics Ifignitionisnotestablishedwithinthreetimes theheatcircuitintheHSImodule will lock out until it is manually reset To reset the HSI system open and close the main door and restart the dryer b A gas pressure test should be taken at the gas valve pressure tap of each dryer to assure that the water column pressure is correct and consistent NOTE Water column pressure requirements measu...

Page 42: ...e functioning properly IMPORTANT The dryer basket tumbler is treated with a protective coating ADC suggests tumblingoldclothesormaterialinthebasket tumbler usingamilddetergent to remove the protective coating 6 Make a complete operational check of ALL operating controls a For Microprocessor model check controller computer programs selections 1 Each microprocessor controller computer has been prepr...

Page 43: ...d stop times are adjustable in the Manual timed Mode b Dual Timer Models 1 Both dwell stop and basket tumbler spin time are adjustable refer to illustration on page 49 9 Check to insure that ALL set screws i e tumbler drive idler etc are tight K PREOPERATIONAL INSTRUCTIONS 1 To start the dryer a Microprocessor computer dryers 1 The L E D display will read REAdY 2 Press the E on the touch pad of th...

Page 44: ... 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 b STEAM MODELS discontinue the steam supply 1 SHUT OFF external location furnished shut off valve 2 SHUT OFF internal steam valves in the supply lines and the return line...

Page 45: ...randserialnumbersothatyourinquiryishandledinanexpeditiousmanner B PARTS 1 Replacement parts should be purchased from the distributor from whom the ADC equipment was purchased If the distributor cannot be contacted or is unknown contact the ADC Parts Department for a distributor in your area Parts may also be purchased directly from the factory by calling the ADC Parts Department at 508 678 9010 or...

Page 46: ...distributor cannot be contacted or is unknown warranty information can be obtained from the factory by contacting the ADC Warranty Department at 508 678 9000 NOTE Whenever contacting the ADC factory for warranty or warranty information be sure to have the dryer s model number and serial number available so that your inquiry can be handled in anexpeditiousmanner C RETURNING WARRANTY PARTS ALL dryer...

Page 47: ...ed in transit Damage claims are the responsibility of the shipper IMPORTANT No replacements credits or refunds will be issued for merchandise damaged in transit 5 ALL returns should be shipped to the ADC factory in such a manner that they are insured and a proof of delivery can be obtained by the sender 6 Shipping charges are not the responsibility of ADC ALL returns should be prepaid to the facto...

Page 48: ... KEEPDRYERAREACLEARAND FREE FROM COMBUSTIBLE MATERIALS GASOLINE and OTHER FLAMMABLEVAPORS and LIQUIDS NOTE Suggested time intervals shown are for average usage which is considered six 6 to eight 8 operational running hours per day SUGGESTED CLEANING SCHEDULE EVERY THIRD or FOURTH LOAD Clean the lint screen every third or fourth load A clogged lint screen will cause poor dryer performance The lint ...

Page 49: ...N CREATEAPOTENTIALFIRE HAZARD NOTE DO NOT OBSTRUCT THE FLOW OF COMBUSTION and VENTILATIONAIR CHECK CUSTOMER FURNISHED BACK DRAFT DAMPERS IN THE EXHAUST DUCT WORK INSPECT and REMOVEANY LINTACCUMULATION WHICH CAN CAUSE THE DAMPER TO BIND or STICK NOTE A back draft damper that is sticking partially closed can result in slow drying and shutdown of heatcircuitsafetyswitchesorthermostats NOTE When clean...

Page 50: ...dryer b Start the drying cycle by pressing any of the preset cycles in letters A F c Verify that the motor s and the heat indicator dots in the microprocessor computer L E D display are on Refer to the illustration below 1 Basket tumbler in Forward Mode clockwise 2 Basket tumbler in Reverse Mode counterclockwise indicator for Reversing Models Only 3 Heat on indicator 4 On indicator dryer is in Ope...

Page 51: ...ly 3 Rev Reverse output L E D indicator for optional Reversing Models Only 4 HT 1 Heat output L E D indicator 5 Fuse Main Fuse input L E D indicator 6 Lint Lint Door input L E D indicator 7 Main Main Door input L E D indicator 8 Drum Tumbler Hi Limit input L E D indicator 9 Sail Sail Switch input L E D indicator 10 Burn Burner Hi Limit input L E D indicator 11 Flame Burner Control Failure input L ...

Page 52: ...he drying cycle d The hot surface ignitor will turn on After approximately 4 seconds the glo bar will shut off and the gas valve will be energized The flame should now be established e With the burner flame on remove the flame sensor wire from the S2 terminal of the HSI module The burner flame must shut off immediately f Stop the drying cycle with the flame sensor wire still removed restart the dr...

Page 53: ...er 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 Timing Legend Spin Time Switch Position Number 1 2 3 4 5 Time in Seconds 30 60 90 120 150 dd Dwell Stop Time 1 2 3 4 5 Switch Position Number 5 6 8 10 12 Time in Seconds Values shown are 1 second ...

Page 54: ...cting American Dryer Corporation certain information is required to insure proper service parts information from American Dryer This information is on the data label located on the inside of the control door When contacting American Dryer please have the model number and serial number available ...

Page 55: ...cular model 4 TYPE OF HEAT The type of heat describes the type heat for your particular dryer gas either natural gas or liquid propane L P or steam 5 HEAT INPUT for GAS DRYERS This describes the heat input in British Thermal Units per Hour BTUH 6 ORIFICE SIZE for GAS DRYERS Gives the number drill size used 7 ELECTRIC SERVICE This describes the electric service for your particular model 8 GAS MANIF...

Page 56: ...ADC113001 1 09 11 97 50 2 01 12 98 50 3 04 16 98 50 4 08 11 98 100 5 12 07 98 100 6 09 21 99 100 7 01 03 00 200 ...

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