American Dryer Corp ML-55II installation manual 861.84 kPa, Installation Instructions

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Operating Steam Pressure

Maximum

125 psig*

861.84 kPa

 

 

 

Heat Input (Normal Load)

4.2 Bhp

 

 

 

Consumption (Approximate)

144.7 lbs/hr

65.7 kg/hr

 

 

 

Shaded areas are stated in metric equivalents

*The minimum operating pressure is 100 psig (689.47 kPa) for optimum results.

Installation Instructions

To ensure an adequate supply of steam is provided, be sure that the steam supply lines and steam return lines are sized and laid out as stipulated in this manual. Inadequate steam supply lines and steam return lines or improper steam plumbing will result in poor performance and can cause component failure. Clean, dry steam must be provided to the dryer.

Important

Steam coil failure due to water hammer by wet steam

!will void the warranty.

The pressure of the condensate in the steam supply line will cause water hammer and subsequent heat exchanger (steam coil) failure. The steam supply connection into the main supply line must be made with a minimum 10-inch (25.4 cm) riser. This will prevent any condensate from draining towards the dryer.

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.

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.

Shutoff valves for each dryer should be installed in the supply line, return line, and drip trap return line. This will allow the dryer to be isolated from the supply main and the return main if the dryer needs maintenance work.

Install an inverted bucket steam trap and check valve at least 12-inches (30.48 cm) below the steam coil as close to the coil as possible; a trap with a capacity of 400 lbs (181.5 kg) of condensate per hour at 125 psi (8.6 bar) is needed for each unit.

The supply line and the return line should be insulated. This will save energy and provide for the safety of the operator and maintenance personnel.

Water pockets in the supply line, caused by low points, will provide wet steam to the coil possibly causing steam coil damage. All horizontal runs of steam supply piping should be pitched 1/4-inch (6.35 mm) for every 1 foot (0.30 meters) 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.

113345-9

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Contents ML-55II Installation Manual Retain This Manual In a Safe Place For Future Reference Table of Contents 113345-9 Safety PrecautionsCoil failure due to improper pH level will void Warranty What to do if You Smell GasSpecifications SPECIFICATIONS/COMPONENTDryer Front View Installation ProceduresComponent Identification Location RequirementsAllowances must be made For opening the control door Unpacking/Setting UpDryer Enclosure Requirements Leveling DryerHorizontal Venting Fresh Air Supply RequirementsExhaust Requirements General Exhaust Ductwork InformationVertical Venting Outside Ductwork ProtectionSingle Dryer Venting Or roof made of combustible When the exhaust ductworkHazard. The copper conductor wire/cable must be of proper Passes through a wall, ceilingElectric Models Only Electrical Service SpecificationsSingle-Phase 1ø Wiring Connections/Hookup Gas and Steam Models onlyElectrically Heated Models Only Phase 3ø Wiring Connections/HookupGas Information Steam Requirements High Pressure Steam InformationPiping/Connections Steam Coil pH Level861.84 kPa Installation InstructionsAir Connection Steam Damper Air Piston Flow Control Operation AdjustmentSteam Damper Air System Connections Air RequirementsPreoperational Tests Preparation For Operation/Start-UpShutdown Instructions Preoperational InstructionsWarranty Information SERVICE/PARTS InformationLubrication Routine MaintenanceCleaning AdjustmentsTheory of Operation Procedure for Functional Check of ReplacementMicroprocessor Controller Computer Board For Models with Fenwal Controls DSI ModuleData Label Information Manual Reset Burner HI-LIMITPhase Dual TimerWater Connections InstallationFire Suppression System Before You StartElectrical Requirements S. Theory Of OperationTypical Water Supply Optional Manual Bypass S. Water Valve Check System ResetS. Diagnostics S. Diagnostics MessagesADC 113345 9 12/01/04-6