American Dryer Corp AD-170 specification

To Test and Adjust Gas (Water Column) Pressure

There are two (2) types of devices commonly used to measure water column pressure. They are spring/mechanical- type gauges and manometers. The spring/mechanical-type gauge is not recommended, because it is easily damaged and not always accurate. A manometer is simply a glass or transparent plastic tube with a scale in inches. When filled with water and pressure applied, the water in the tube rises showing the exact water column pressure.

NOTE: Manometers are available from the factory by ordering ADC P/N 122804

1. To Test Gas Water Column (W.C.) Pressure:

a. Connect water column test gauge connection to gas valve pressure tap (1/8" NPT). This pressure tap is located on the outlet (manifold) side of the valve.

b. Start dryer. With burner on, the correct water column reading in inches would be:

Natural Gas – 3.5 to 4 Inches Water Column

L.P. Gas – 10.5 to 11 Inches Water Column

2.To Adjust Water Column Pressure (natural gas only, L.P. gas must be regulated at source):

a. Remove the slotted vent cap on the top of the valve.

b. Turn the slotted adjustment screw located on the top of the valve next to the terminals. Turn clockwise to increase manifold pressure and counterclockwise to decrease.

NOTE: If correct W.C. pressure cannot be achieved, problem may be due to an undersized gas supply line, a faulty or underrated gas meter, etc.

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American Dryer Corp AD-170 service manual To Test and Adjust Gas Water Column Pressure

Contents

AD-170 Retain This Manual In a Safe Place For Future Reference AD-170Page For Your Safety Table of Contents Sail Switch Assembly Safety Precautions Important Information Routine Maintenance Cleaning Adjustments Lubrication Installation Requirements Enclosure, Air Supply, and Exhaust Requirements Operational Service Check Procedure Electrical and Gas Requirements Control Box Computer Panel AssemblyDescription of Parts DSI Module Gas Models Only Blower Motor and Impellor Hz Gas Models Only Gas Burner AssemblyDrive Motor Blower Motor and Impellor 50Hz, 60Hz Steam & 50Hz Gas Tumbler Bearing and Pulley Arrangement Idler AssemblyBasket Tumbler Sail Switch Gas Models only Main Door SwitchHi-Limit Gas Models Only Lint Drawer Automatic Reset ThermostatLint Drawer Switch Steam Damper System Servicing Introduction To Replace Keyboard Label Assembly Computer Controls To Replace Computer To Replace Microprocessor Temperature Sensor Probe Page To Replace Gas Valve see burner illustration on To Replace Main Burner Orifices To Test and Adjust Gas Water Column Pressure To Convert from Natural Gas to L.P. Gas To Replace Burner Tubes To Replace DSI Module Sail Switch Assembly Gas Models Only To Replace Sail Switch To Adjust Sail Switch To Replace Main Door Assembly To Install New Main Door Glass To Replace Front Panel To Replace Main Door Hinge Pad Pulleys To Replace Tumbler Pulley To Replace Small Idler Pulley To Replace Large Idler Pulley To Replace Motor PulleyPage Basket Alignment Lateral Side to Side Adjustment To Replace Tumbler Basket or Tumbler Basket Support Important Never strike the shaft directly with a hammer To Replace Front Basket Support Pillow Block Bearing To Replace Front Idler Shaft Pillow Block Bearing To Replace Rear Idler Shaft Pillow Block Bearing Belt Tension Adjustment Basket to IdlerBelts See illustrations in section F Pulleys To Replace V-Belts Belt Tension Adjustment Motor to IdlerMotors To Replace Drive Motor Page To Replace Lint Drawer Switch Lint Drawer Assembly To Replace Lint ScreenImpellor No display on computer TroubleshootingComputer will not accept key pad entries Dryer will not start, but computer display indicators are on Drive motor runs, burner is on, but basket will not turn Dryer operates, probe sparks, but gas does not flow Dryer operates but is taking too long to dry Thermal overload for drive motor is tripping Dryer is cycling on burner hi-limit safety thermostatOverload for impellor fan motor is tripping Dryer does not start. Display reads door Display reads dSFL. Dryer Sensor Circuit FailureThere is excessive vibration coming from the basket Electrical Trouble Shooting Phase 5 OPL System Diagnostics Diagnostic LED Display Failure Codes LED Display Indicators Page Page LED Display/Codes Cycle Status LED Display Codes CY F Fill Fault Codes Computer Logic and Wiring DiagramPage No Display Condition Page Blower motor does not operate, drive motor runs Door condition Microprocessor reads Dsfl Technical Information Motor Plate High and Low Voltage Data Label Contacting American Dryer Corporation ADC Information on the Data Label Using a Manometer HOW to USE a Manometer AD-170SE Tool List ADC450400 1- 02/27/98-50