Summary of Contents for GAE CMFD
- Page 1 Product User Manual ♦ ♦ EPRI Commercial Microwave Fabric Dryer Document # 930001, Rev. 2 July 1999 P.O. Box 580816 ♦ Modesto, CA 95358...
- Page 2 All warranty repairs are to be done at GAE’s facility or as otherwise authorized by GAE. All shipping charges for warranty repair or replacement are the purchaser’s responsibility unless otherwise agreed to by GAE.
- Page 3 10 milliwatts per square centimeter to be generated in an area accessible to operating personnel. Contact GAE, Inc. for technical support prior to installation and/or operation of these units if there is any question or concern about microwave leakage.
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Page 4: Table Of Contents
Product User Manual Page 4 EPRI Commercial Microwave Fabric Dryer TABLE OF CONTENTS INTRODUCTION ......................5 GENERAL DESCRIPTION....................6 Electrical Specifications Mechanical Specifications Controls Sensors INSTALLATION ......................8 Preliminary Inspection Facilities Requirements Location Electrical Connections BASIC OPERATION ..................... 10 Initial Power-Up Dryer Loads Drying Cycle Setting Cycle Start... -
Page 5: Introduction
AGL and funding for the dryer development program at EPRI was temporarily halted. During its hiatus the dryer program was transferred to GAE, Inc. to await funding for completion of construction and general refurbishment of the CMFD. Renewed interest in the program focused around potential industrial applications in textiles manufacturing. -
Page 6: General Description
Additional sensors are provided to monitor the dryer operation and performance and shut off the dryer in the event of malfunction. Facilities requirements for the CMFD are the same as those for conventional commercial dryers. The input line power required is 208-220 VAC, single phase, 60 Amps, and the exhaust connection is to a standard 4”... -
Page 7: Electrical Specifications
Product User Manual Page 7 EPRI Commercial Microwave Fabric Dryer Electrical Specifications Microwave Power 5.4 kW (nominal) provided by three 1.8 kW generators Magnetrons Hitachi 2M130 Hot Air 6.5 kW (approx.) provided by three 1.5 kW duct heaters plus 2 kW from recycled waste heat Line Power Input 208-220 VAC, Single Phase, 60 Amps (2-wire plus ground) -
Page 8: Installation
• Line Power: 208-220 VAC, 60 Hz, single phase, 60 Amps, 2- wire plus ground. Proper earth ground must be provided. Please note that, while an internal line filter is provided, the CMFD has not been tested for immunity to noise, spikes or other line power conditions that may be present in typical industrial environments. - Page 9 • Line Current Monitoring: An 11-pin ‘MS’ style circular connector (J1) located on the back of the CMFD provides three separate analog voltage signals that are proportional (10VDC = 100A) to the line current drawn by corresponding subsystems within the CMFD.
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Page 10: Basic Operation
Initial Power-Up After connecting line power as described in the “Installation” section of this manual, power is applied to the CMFD by lifting the circuit breaker handle located near the line power connector on the back panel. This applies power to various low voltage power supplies which in turn supply power to the microprocessor and other controls. -
Page 11: Drying Cycle Setting
Failure to prevent water accumulation and dripping may result in electrical damage to the CMFD. Spin drying of all loads prior to microwave drying is highly recommended. Drying Cycle Setting Any one of three drying cycles can be selected depending on the type of fabric load. -
Page 12: Cycle Stop
Product User Manual Page 12 EPRI Commercial Microwave Fabric Dryer the microwave power supply contactors will not be heard (see gas sensor fault cycle described below). Try starting again after the end of the fault sequence (ten-second buzzer turns off), but discontinue starting and check the load if the fault cycle is repeated. -
Page 13: Lint Screen Cleaning
The lint screen, located inside the panel beneath the cavity door, should be inspected regularly and cleaned as necessary. Failure to properly clean the lint screen may result in inadequate air flow and faulty operation of the CMFD. Gerling Applied Engineering, Inc. Modesto, CA... -
Page 14: Theory Of Operation
THEORY OF OPERATION This section explains in detail the various functions, features and control sequences of the CMFD. Knowledge of these details will assist the operator and service personnel to understand how the functions interact, interpret process results and diagnose operational difficulties. -
Page 15: Field Strength Sensor
EPRI Commercial Microwave Fabric Dryer The high voltage, also referred to as the “plate” voltage, is generated in the CMFD using a “full wave voltage doubler” power supply. This power supply consists of two separate power supply sections operating on alternate phases of the line cycle. Each section, also referred to as a “half wave voltage doubler”... -
Page 16: Arc Detector
The duration of an arc is usually very short, so the detector circuitry amplifies the signal pulse and “stretches” it sufficiently to energize a relay and shut down the CMFD. When this occurs the ‘Arc Detect’ lamp on the front panel turns on to notify the operator of the event. -
Page 17: Exhaust Gas Sensors
Product User Manual Page 17 EPRI Commercial Microwave Fabric Dryer by the microprocessor for control of the CMFD, but rather it is provided only for data acquisition purposes. Exhaust Gas Sensors A series of four sensors monitor the exhaust air for the presence of specific compounds commonly found in smoke or other products of combustion. -
Page 18: Low Voltage Power Supplies
Several low voltage power supplies provide power to various control circuits. These power supplies are on whenever line power is connected to the CMFD and the main circuit breaker is turned on. Their functions are described as follows: • 24 VDC Power Supply – This power supply is the primary source of control power to the CMFD. - Page 19 Product User Manual Page 19 EPRI Commercial Microwave Fabric Dryer freely through the center of the cavity as they tumble. In any case, the maximum allowable basket rotation speed is 60 rpm. Gerling Applied Engineering, Inc. Modesto, CA...
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Page 20: User Maintenance
Product User Manual Page 20 EPRI Commercial Microwave Fabric Dryer USER MAINTENANCE The CMFD is designed to relatively maintenance free. With the exception of the lint screen, there are no operator serviceable parts or subassemblies inside the CMFD. WARNING: Lethal voltages may exist inside the CMFD even during periods of non-operation. -
Page 21: Process Data Collection
A ribbon cable terminated with a 9-pin subminiature “D” type connector is provided at the back of the CMFD for this purpose. The microprocessor control software is designed to deliver the following parameters through this serial port: •... - Page 22 After the WinWedge software has successfully started the ribbon cable from the CMFD can be connected to the remote computer’s COM1 serial port to begin logging data. The number of samples collected will be indicated in the upper left hand corner of the spread sheet.
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