Related Manuals for Gardner Denver RHS20 SCFM
Summary of Contents for Gardner Denver RHS20 SCFM
- Page 1 HIGH INLET TEMPERATURE REFRIGERATED DRYER RHS20-110 SCFM PRINTED IN THE USA 2-2-620 REV REL 9/99...
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Page 2: Installation
1. SAFETY RULES 1.1 Definition of the Conventional Signs Used in This Manual 1.2 Warnings 1.3 Proper Use of the Dryer 2. INSTALLATION 2.1 Transportation 2.2 Installation site 2.3 Installation layout - Correction factors 2.4 Connection to the Compressed Air System 2.5 Connection to the Mains 2.6 Condensate Drain 3. - Page 3 DEFINITION OF THE SIGNS USED IN THIS MANUAL Before attempting any service on the dryer, read instructions carefully. Risk of danger or possible damage to the machine. Read carefully the text related to this sign. Electrical hazard, The relevant text outlines conditions that could have fatal results. The related instructions must be strictly respected.
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Page 4: Proper Use Of The Dryer
1.2 WARNINGS Compressed air is a highly hazardous energy source. Never work on the dryer while Pressurized. Never point the compressed air or the condensate drain outlet towards any person. The user is responsible for the installation of the dryer, which has to be executed on the basis of the instructions given in the Installation chapter. -
Page 5: Installation Site
2.2 INSTALLATION SITE Particular care is required in selecting the installation site, as an improper location could jeopardize the proper operation of the dryer. This unit is not suitable to be used in an explosive atmosphere, where risk of fire could exist, or in presence of gaseous or solid polluting material. Don’t use water to extinguish fire on the dryer or in the surrounding area. - Page 6 2.3 INSTALLATION LAYOUT - CORRECTION FACTORS 1 AIR COMPRESSOR 5 DRYER 2 PRE-FILTER 6 BY-PASS 3 COMPRESSED AIR TANK 7 CONDENSATE DRAIN 4 AFTERFILTER Type A installation is suggested when the compressor operates at reduced intermittence and the total consumption equals the compressor flow rate.
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Page 7: Connection To The Compressed Air System
2.4 CONNECTION TO THE COMPRESSED AIR SYSTEM Operations to be performed by qualified personnel. Never perform maintenance with unit under pressure. The user is responsible to ensure that the dryer will never be operated with pressure exceeding the nominal values. Eventual over-pressure could be dangerous both for the operator and the machine. The temperature and the amount of air entering the dryer must comply with the limits reported on the data plate. -
Page 8: First Start-Up
3.2 FIRST START-UP At the first start-up, or in case of start-up after a long inactivity period or following maintenance operations, respect the instructions given below. Qualified personnel must perform the start-up. Sequence of operations: Be sure that all the steps of the Installation chapter have been respected. •... - Page 9 4.1 SPECIFICATIONS FOR 20/25 SCFM 17.75 21.25 RHS20 RHS25...
- Page 10 4.2 SPECIFICATIONS FOR 40/55 SCFM 19.25 23.25 RHS40 RHS55...
- Page 11 4.3 SPECIFICATIONS FOR 75/110 SCFM RHS75 RHS110...
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Page 12: Control Panel
5.1 CONTROL PANEL The control panel illustrated below is the only dryer-operator interface. 1 ILLUMINATED ON/OFF SWITCH 2 AIR DRYER CONTROLLER 3 AIR AND REFRIGERANT FLOW DIAGRAM 5.2 OPERATION The dryer described in this manual basically consists of two separate circuits: a compressed air circuit, divided into three heat exchangers, and a refrigerating circuit. -
Page 13: Flow Diagram
5.3 FLOW DIAGRAM 1 REFRIGERATION COMPRESSOR 11 ELECTRIC DRAIN 2 CONDENSER 12 AIR-AIR HEAT EXCHANGER 3 FILTER DRYER 13 CONDENSATE SEPARATOR 4 CAPILLARY TUBE 14 CONDENSATE DRAIN SERVICE VALVE 5 EVAPORATOR 15 CONDENSATE FILTER 6 LIQUID SEPARATOR (75-110 SCFM) 16 CONDENSATE DRAIN SOLENOID VALVE 7 HOT GAS VALVE 17 CONDENSER FAN 8 AFTERCOOLER... -
Page 14: Refrigerating Compressor
5.4 REFRIGERATING COMPRESSOR The refrigerating compressor is the pump of the system where the gas coming from the evaporator (low pressure side) is compressed up to the condensation pressure (high pressure side). All the compressors used are manufactured by primary companies and are designed for applications where high compression ratios and wide temperature changes are present. -
Page 15: Hot Gas By-Pass Solenoid Valve
5.10 HOT GAS BY-PASS SOLENOID VALVE This valve is located between the pressure side of the compressor and the terminal side of the evaporator. Its purpose is to avoid conditions of low thermal charge in the dryer (low air flow or relatively cold air) The temperature inside the evaporators will drop below 32ºF. - Page 16 5.16 AIR DRYER CONTROLLER The Air Dry Controller device controls the whole operation of the dryer, and allows the calibration of the operating parameters. The activation of the hot-gas solenoid valve is driven by means of a probe located at the end of the evaporator, while a cyclic electronic timer drives the condensate drain solenoid valve at regular intervals.
- Page 17 5.17 ELECTRICAL LAYOUT 20/25 SCFM LEGEND: IG - ON/OFF SWITCH V - CONDENSER/AFTERCOOLER FAN K - REFRIGERATION COMPRESSOR PR – AIR CONTROLLER PROBE KR – COMPRESSOR START RELAY EVB – HOT GAS VALVE KM – COMPRESSOR MOTOR EVD – CONDENSATE DRAIN SOLENOID VALVE KT –...
- Page 18 5.18 ELECTRICAL LAYOUT 40/55/75 SCFM LEGEND: IG - ON/OFF SWITCH - CONDENSER FAN K - REFRIGERATION COMPRESSOR - AFTERCOOLER FAN KR – COMPRESSOR START RELAY PR – AIR CONTROLLER PROBE KM – COMPRESSOR MOTOR EVB – HOT GAS VALVE KT – COMPRESSOR THERMAL PROTECTION EVD –...
- Page 19 5.19 ELECTRICAL LAYOUT 110 SCFM LEGEND: IG - ON/OFF SWITCH - CONDENSER FAN K - REFRIGERATION COMPRESSOR - AFTERCOOLER FAN KR – COMPRESSOR START RELAY PR – AIR CONTROLLER PROBE KM – COMPRESSOR MOTOR EVB – HOT GAS VALVE KT – COMPRESSOR THERMAL PROTECTION EVD –...
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Page 20: Controls And Maintenance
6.1 CONTROLS AND MAINTENANCE Qualified personnel must perform Maintenance operations. Before any maintenance, be sure that: Power is disconnected and that it cannot be connected to the main supply. Machine is not under pressure and that it cannot be connected to the compressed air system. Before attempting any maintenance operation on the dryer, switch it off and wait at least 30 minutes. -
Page 21: Replacement Parts
6.2 REPLACEMENT PARTS DESCRIPTION RHS20 RHS25 RHS40 RHS55 RHS75 RHS110 CONDENSATE DRAIN FILTER WPP-64355FF011 WPP-64355FF011 WPP-64355FF011 WPP-64355FF011 WPP-64355FF011 WPP-64355FF011 FAN MOTOR WPP-5210135015 WPP-5210135015 WPP-5210135015 * WPP-5210135015 * WPP-5210135020 * WPP-5210135020 * FAN BLADE WPP-5215000022 WPP-5215000022 WPP-5215000022 * WPP-5215000022 * WPP-5215000025 * WPP-5215000025 * FAN GUARD WPP-5225000015... -
Page 22: Troubleshooting
7.1 TROUBLESHOOTING The troubleshooting and the eventual checks have to be worked out by qualified personnel. Pay particular attention in entering the refrigerating circuit. The refrigerant if under pressure, while expanding could cause burns and serious damage to the eyes, should it gets in contact with them. SYMPTOM POSSIBLE CAUSE - SUGGESTED ACTION The machine doesn't start. - Page 23 SYMPTOM POSSIBLE CAUSE - SUGGESTED ACTION Excessive pressure drop within the dryer. The dew point is too low - the condensate is frost and blocks the air -see the specific section. Check for restriction in the flexible connection hoses. DewPoint too low. Verify the electric wiring of the Air Dry Controller.
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Page 24: Warranty Statement
Note: In addition to the above stated warranty, both air to air and air to refrigerant heat exchangers in Gardner Denver dryers are warranted on a prorated basis from time of shipment for a period of five (5) years. It is the manufacturers option to repair or replace the heat exchanger. This extended warranty is limited to parts only and will be prorated in the following manner: year 1 - 100% of current cost, year 2 - 100%, year 3 - 75%, year 4 - 50%, year 5 - 25%. - Page 25 Description of problem or complaint with as much detail as possible. 2. Gardner Denver dryer service will ask for a purchase order at this time. The P.O. will be used in the event that parts or labor are non warranty. If a warranty situation is deemed to exist, the distributor will not be billed for the call.
- Page 26 WHAT IS AND WHAT IS NOT COVERED UNDER THIS WARRANTY? NOT COVERED: All FREIGHT DAMAGE CLAIMS are not the responsibility of the manufacturer and are not covered under warranty as all products are shipped F.O.B. shipper. Please direct freight claims to the shipper in questions. Two mechanics on a warranty job, extra helpers deemed necessary.
- Page 27 NOTES:...
- Page 28 DISTRIBUTOR P.O. NUMBER (INITIATES SERVICE CALL) FAX NUMBER WHERE WARRANTY CLAIM NUMBER CAN BE FAXED For additional information contact your local representative or Gardner Denver Customer Service 1800 Gardner Expressway, Quincy, Illinois 62301 Telephone: (800) 682-9868 FAX: (217) 224-7814 Sales and Service in all major cities.