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Low Cost Air Dehydrator
®
MODEL EDH–4
We Manage Heat
®
Installation and Operation Manual
Environmental Technology, Inc.
1850 N Sheridan Street • South Bend, IN 46628
(574)233-1202 • Fax (574)233-2152
Toll Free (800)234-4239 • Fax (888)234-4238
www.networketi.com • helpdesk@networketi.com
18063 Rev E
06/17
(800) 234-4239
networketi.com
Environmental Technology, Inc.
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Table of Contents
Summary of Contents for Environmental Technologies EDH–4
- Page 1 Low Cost Air Dehydrator ® MODEL EDH–4 We Manage Heat ® Installation and Operation Manual Environmental Technology, Inc. 1850 N Sheridan Street • South Bend, IN 46628 (574)233-1202 • Fax (574)233-2152 Toll Free (800)234-4239 • Fax (888)234-4238 www.networketi.com • helpdesk@networketi.com 18063 Rev E 06/17 (800) 234-4239...
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Page 2: Safety Information And Warning Summary
Model EDH–4 Rev E Installation and Operation Manual SAFETY INFORMATION AND WARNING SUMMARY Read and become familiar with the safety information below. Lethal Voltages Present There are lethal voltages present inside the case of the EDH–4. Service should be per- formed by qualified personnel only. -
Page 3: Table Of Contents
Model EDH–4 Rev E Installation and Operation Manual TABLE OF CONTENTS SECTION PAGE Safety Information and Warning Summary Glossary Returns and Replacement Parts Purchases Replacement Parts List Ordering Information Introduction Purpose of EDH–4 Description Installation Unpacking/Packing Inventory List Additional Equipment Required for Installation Initial Inspection Location of Installation Mounting the EDH–4... -
Page 4: Glossary
Model EDH–4 Rev E Installation and Operation Manual GLOSSARY Listed below are some important terms and their definitions. Solar Gain Generally occurring each day at sunrise, the time when sunlight and heat increase, resulting in a natural corresponding rise in temperature and pressure inside a cable line. Solar gain can also occur before or after a major weather event. -
Page 5: Introduction
Model EDH–4 Rev E Installation and Operation Manual INTRODUCTION Please read this manual for information on the EDH–4 prior to installing, operating or servicing the unit. Purpose of EDH–4 The EDH–4 Air Dehydrator maintains waveguides, air dielectric coaxial cable and other related compo- nents used in earth stations, terrestrial UHF, microwave communication systems and the like. -
Page 6: Installation
Model EDH–4 Rev E Installation and Operation Manual INSTALLATION Unpacking/Packing Immediately inspect the shipping container and packing material for damage. Unpack the EDH–4, taking care not to damage the cushioning materials. Save the shipping container and related materials until normal operation has been established. - Page 7 Model EDH–4 Rev E Installation and Operation Manual Mounting Install this unit in compliance with National Electrical Code (NEC) and Canadian Electrical Code (CEC) standards, as well as all other local and applicable electrical codes for your area. Prior to beginning installa- tion, make sure that the facility has properly sized electric service and breaker.
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Page 8: Preparation And System Set-Up
Model EDH–4 Rev E Installation and Operation Manual Note: This unit produces a slight vibration due to oscillating components. This may lead to fatigue and possible failure of the mounting system or wall material. Please consider this when planning your installation. PREPARATION AND SYSTEM SET-UP Principal Considerations The EDH–4 works best supplying dry air in a flowing system, where the dehydrator completely replaces... -
Page 9: Operation
Model EDH–4 Rev E Installation and Operation Manual OPERATION Figure 6. PRESSURE display window, Control MODE switch The EDH–4 makes use of a single switch called the Mode selector [MODE]. This is located just below the PRESSURE LED display window (Figure 6). [MODE] allows the user to •... -
Page 10: Operating Procedures
Model EDH–4 Rev E Installation and Operation Manual OPERATING PROCEDURES Automatic Operation The EDH–4 will commence operation when power is applied. The unit will automatically regulate the system pressure between 0.3 psig (20.7 mbar) and 0.5 psig (37.5 mbar). Alarm Relays The EDH–4 has two alarm relays;... -
Page 11: Technical Description
Model EDH–4 Rev E Installation and Operation Manual Figure 8. Feed Horn Dehydrator, Feed Window waveguide, feed horn, antenna signal path Feed Window Membrane Feed Horn Antenna Feed Horn " NPT Female Pressure Inlet: Orthomode " NPT Female Pressure Relief Transducer or Bleed Valve Pressure Inlet:... -
Page 12: Maintenance
Model EDH–4 Rev E Installation and Operation Manual MAINTENANCE Periodic Maintenance The EDH–4 uses a granular desiccant consisting of Amorphous Alumino silica gel, coated with an orange iron compound indicator. The silica gel granules turn white when wet, indicating the need to regenerate or replace the desiccant. - Page 13 Model EDH–4 Rev E Installation and Operation Manual Figure 10. Desiccant Bottle Removal – Front Display Panel, clockwise from left: Open front panel; undo straps; disconnect tubing; ready; remove bottle; open or replace (page 15) Restraint Cable The desiccant bottle on the EDH–4 is accessible below the top panel. The steps are: Remove power and vent system of pressurized air Remove four (4) attachment screws from top panel (Fig.
- Page 14 Model EDH–4 Rev E Installation and Operation Manual Figure 12. Desiccant Bottle Removal – Top Panel Top: remove the attachment screws, then the “eTi” Top Panel Row Two: undo straps Nozzle/Tube Row Three: disconnect tubing from nozzles; remove bottle Straps Connections Replacement Desiccant PART NUMBER...
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Page 15: Regenerating The Desiccant
Model EDH–4 Rev E Installation and Operation Manual Regenerating the Desiccant • Empty desiccant into clean baking dish • Bake desiccant at 320°F (160°C) in a conventional oven for two hours, stirring every 30 minutes, or until silica gel particles turn orange—DO NOT USE A MICROWAVE OVEN •... -
Page 16: Specifications
Model EDH–4 Rev E Installation and Operation Manual SPECIFICATIONS Operation Interface Dehydrator Type Non-Programmable, Single Can- Air Pressure Indication Digital Display (English or SI) ister, Desiccant Dehydrator Data Display Pressure, Estimated Desiccant Regeneration Method Manual Regeneration or Replacement Capacity Remaining, Error Codes...
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