American Dryer Corp MDG-75 manual Preoperational Tests, Gas Dryers

Page 33

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.

Gas Dryers

When a gas dryer is first started (during initial start-up), it has a tendency not to ignite on the first ignition attempt. This is because the gas supply piping is filled with air, so it may take a few minutes for the air to be purged from the lines.

NOTE: During the purging period, check to be sure that ALL gas shut-off valves are open.

NOTE: Gas Dryers are equipped with a Hot Surface Ignition (HSI) system which has internal diagnostics. If ignition is not established within three times, the heat circuit in the HSI module will lock out until it is manually reset. To reset the HSI system, open and close the main door and restart the dryer.

A gas pressure test should be taken at the gas valve pressure tap of each dryer to assure that the water column pressure (W.C.) is correct and consistent.

NOTE: Water column pressure requirements (measured at the pressure tap of the gas valve body):

Natural Gas

3.5 -Inches Water Column (W.C.)

L.P. Gas

10.5 -Inches Water Column (W.C.)

IMPORTANT: There is no regulator 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.

29

Image 33
Contents MDG-75 Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Contents Section Procedure for Functional Check of Replacement Important Information SectionWhat to do if YOU Smell GAS Safety PrecautionsPage Specifications SPECIFICATIONS/COMPONENT IdentificationSpecifications Component Identification Dryer Rear View Illus. No Location Requirements Installation ProceduresUNPACKING/SETTING UP Dryer Enclosure Requirements Fresh AIR Supply Exhaust Requirements Not be Reduced Anywhere Down Stream of the Dryer Page Page Electrical Information MDG-75 GAS Page 3+$6 ‘ /&75,&$/&211&7,216/$6 Page Page GAS Information 48, 3523$1 Page Page Preparation for OPERATION/START-UP Gas Dryers Preoperational TestsPage Preoperational Instructions Shut Down Instructions SERVICE/PARTS Information ServiceParts Returning Warranty Cards Warranty InformationCleaning Routine MaintenanceDays Days After Installation and Every 6 Months Thereafter AdjustmentsProcedure for Functional Check Replacement Components Page Page 1* /*1’ Reversing Timer Spin and Dwell AdjustmentsData Label Technical InformationApplicable Approval Seals From the Machine Toallowaccess for CLEANING,ADJUSTING Troubleshooting70 3$ Microprocessor Computer Models Blower and Fan motor is not operating does not start Loose connection in main door switch circuit Page GAS Models Failed microprocessor controller computer Dryer operates but is taking too long to dry Page AA. Condensation on main door glass Timer Models Blower/Fan motor is not operating does not start Page Dryer operates but is taking too long to dry Page Condensation on main door glass Page 01/07/998-50