Related Manuals for Gardner Denver ELECTRA SAVER II G2 STG2-40
Summary of Contents for Gardner Denver ELECTRA SAVER II G2 STG2-40
- Page 1 ELECTRA SAVER II G2 BASE MOUNTED COMPRESSOR ST40-60G2C Operating & Service Manual MODELS: STG2-40 40 HP STG2-50 50 HP STG2-60 60 HP 13-21-614 Version 01 December 30, 2020...
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Page 2: Maintain Compressor Reliability And Performance
Whenever an airend requires replacement or repair, Gardner Denver offers an industry unique, factory remanufactured airend exchange program. From its modern factory, Gardner Denver is committed to supplying you with the highest quality, factory remanufactured airends that are guaranteed to save you time, aggravation and money When ordering parts, specify Compressor MODEL, Method of Cooling, POWER and SERIAL NUMBER (see nameplate on unit). -
Page 3: Warning, Prohibition, Mandatory Label Information
WARNING, PROHIBITION, MANDATORY LABEL INFORMATION Gardner Denver Rotary Screw compressors are the result of advanced engineering and skilled manufacturing. To be assured of receiving maximum service from this machine, the owner must exercise care in its operation and maintenance. This book is written to give the operator and maintenance department essential information for day-to-day operation, maintenance and adjustment. - Page 4 Indicates a hazard with a medium level of risk which, if not avoided, COULD result in death or serious injury. Asphyxiation Hazard, Poisonous Fumes or Toxic Gases in Compressed Air Indicates a hazard with a low level of risk which, if not avoided, MAY result in a minor or moderate injury.
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Page 5: Safety Precautions
SAFETY PRECAUTIONS Safety is everybody’s business and is based on your use of good common sense. All situations or circumstances cannot always be predicted and covered by established rules. Therefore, use your past experience, watch out for safety hazards and be cautious. Some general safety precautions are given below: Failure to observe these notices could result in injury to or death of personnel. -
Page 6: Table Of Contents
TABLE OF CONTENTS Maintain Compressor Reliability and Performance ..................1 Instructions for Ordering Repair Parts/Remanufactured Airends ..............1 Warning, Prohibition, Mandatory Label Information ..................2 Safety Precautions ............................4 Index ................................6 List of Illustrations ............................7 Section 1, General Information ........................8 Section 2, Installation .......................... -
Page 7: Index
INDEX Addition of Oil between Changes ........62 Oil Reservoir ............... 70 Air Filter Element Life ............75 Oil Reservoir Drain ..............14 Air Filter Vacuum Switch ............. 38 Oil Separator Air Filter, Heavy Duty (Standard) ........74 Compressor (GD Eliminator) .......... 70 Air Filter, Section 6 .............. -
Page 8: List Of Illustrations
LIST OF ILLUSTRATIONS Figure 1-1 – Compression Cycle ........................... 8 Figure 1-2 – Starter Box ................................9 Figure 1-3 – Control Box ..............................9 Figure 1-4 – Compressor / Motor Side ......................... 10 Figure 1-5 – Cooler / Reservoir Side ..........................10 Figure 1-6 –... -
Page 9: Section 1, General Information
Figure 1-1 COMPRESSION CYCLE COMPRESSOR - The Gardner Denver Rotary Screw compressor is a single stage, positive displacement rotary machine using meshing helical rotors to effect compression. Both rotors are supported between high capacity roller bearings located outside the compression chamber. Single width cylindrical roller bearings are used at the inlet end of the rotors to carry part of the radial loads. -
Page 10: Figure 1-2 - Starter Box
LUBRICATION, COOLING AND SEALING - Oil is forced by air pressure from the oil reservoir through the oil cooler, thermostatic mixing valve, and oil filter and discharges into the compressor main oil gallery. A portion of the oil is directed through internal passages to the bearings, gears and shaft oil seal. The balance of the oil is injected directly into the compression chamber to remove heat of compression, seal internal clearances and lubricate the rotors. -
Page 11: Figure 1-4 - Compressor / Motor Side
319EBD797-00 Figure 1-4 COMPRESSOR / MOTOR SIDE (Ref. Drawing) Figure 1-5 COOLER / RESERVOIR SIDE 13-21-614 v01 Page 10... -
Page 12: Figure 1-6 Air/Oil Flow Diagram
307EBD797-EA (Ref. Drawing) Figure 1-6 AIR/OIL FLOW DIAGRAM 13-21-614 v01 Page 11... -
Page 13: Section 2, Installation
SECTION 2 INSTALLATION GENERAL - On receipt of the unit, check for any damage that may have been incurred during transit. Report any damage or missing parts as soon as possible Do not electric weld on the compressor or base; bearings can be damaged by passage of current. -
Page 14: Figure 2-1 Typical Compressor Room
Both the air-cooled and water-cooled units require cooling air as well as air to the compressor inlet. Proper ventilation MUST be provided; hot air must be exhausted from the compressor operating area. A typical inlet-outlet air flow arrangement is shown in Figure 2-1. Figure 2-1 TYPICAL COMPRESSOR ROOM Air-Cooled Units - A combination oil/aftercooler is supplied as standard equipment on all air-cooled units. - Page 15 Allow three (3) feet (.9 m) to the nearest obstruction above and on other sides of the unit. FOUNDATION - The Gardner Denver Rotary Screw compressor requires no special foundation, but should be mounted on a smooth, solid surface. Whenever possible install the unit near level. Temporary installation may be made at a maximum 10...
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Page 16: Figure 2-3 - Cold Weather Installation
Provide at least some simple shelter such as a plywood windbreak to protect against drifting snow. Use only Gardner Denver AEON 9000 SP lubricant. Monitor the unit carefully during start-up and operation to be sure it is functioning normally. -
Page 17: Figure 2-4 Inlet Line Lengths
Refer to Engineering Data Sheet 13-9-411, available from an authorized Gardner Denver distributor, for the advantages of using the heat recovered from rotary compressors. This heat recovery could easily pay for an adequate shelter for the unit. -
Page 18: Figure 2-5 Heat Exchanger (Oil Cooler) Approximate Water Flow
DISCHARGE SERVICE LINE - The discharge service line connection on both water-cooled and air-cooled units is made at the right hand corner of the unit, viewed from the opposite end from control panel side. When manifolding two or more rotary screw units on the same line, each unit is isolated by the check valve in the unit discharge line. -
Page 19: Figure 2-6 Aftercooler Approximate Water Flow
AFTERCOOLER Water Temperature to Approximate Heat Exchanger Maximum Water Water Pressure Drop Gallons/minute Flow @ 90F Water (Minimum) Gallons/minute * Temperature PSI Model 60 F 70 F 80 F 90 F 26.0 Less than 1 PSI for any ST40-60G2C 26.0 flow rate shown in the table 26.0... -
Page 20: Figure 2-7 Series Piping
The heat exchanger system is designed to operate with water inlet temperatures from 60F to 90F (16C to 32C) and a water outlet temperature not to exceed 110F (43C). If water colder than 60F is used, high water outlet temperatures (over 110F, 43C) will be experienced along with shortened heat exchanger life caused by tube fouling and corrosion. - Page 21 PARALLEL PIPING (Figure 2-8, page 19) A separate water control valve is required to control the discharge air temperature. If a remote (externally mounted) water-cooled aftercooler is piped in parallel with the heat exchanger, provide a separate water control valve for the aftercooler and pipe separate inlet water lines to both the aftercooler and heat exchanger.
- Page 22 MOTOR LUBRICATION - Long time satisfactory operation of an electric motor depends in large measure on proper lubrication of the bearings. The following charts show recommended grease qualities and re- greasing intervals for ball bearing motors. For additional information refer to the motor manufacturer’s instructions.
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Page 23: Section 3, Starting & Operating Procedures
Compressor Oil - Check the oil level in the reservoir. Add oil only if the oil level gauge reads in the low oil level range. Do not mix different type oils. The unit is shipped filled with Gardner Denver AEON 9000 SP Lubricating Coolant which is suitable for the first 8000 hours under normal operating conditions. - Page 24 5. Electrical - Check the wiring diagrams furnished with the unit to be sure it is properly wired. See Section 4 for general wiring diagrams and Section 2 for installation instructions. Grounding - Equipment must be properly grounded according to Section 250 of the National Electrical Code.
- Page 25 The compressor starts and stops automatically. Automatic restarting can cause injury or death. Open, lockout and tagout main disconnect and any other circuits before servicing the unit. STARTING THE UNIT - Observe the following starting procedures. Unit Cold - If the unit is a water-cooled heat exchanger model, open any manual water inlet valves wide open.
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Page 26: Figure 3-1: Login Button
Quick Start Guide For your convenience, the following excerpt from the Controller Operating and Service Manual is presented to assist in programming the basic operating parameters. However, we strongly recommend you read the Controller Operating and Service manual before attempting operating the compressor package. - Page 27 This password should only be required under unusual circumstances and must be provided by Gardner Denver Technical Support. Note that the passwords can be changed from the default using the Adjustments button on the left of the screen once logged in.
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Page 28: Figure 3-3: Configuration Menu
Setting Up Before running the machine, there are several basic configuration settings that may need to be changed. Controller Configuration Basic controller configuration is located under the Settings -> Configuration menu as shown in Figure 3-3. Figure 3-3: Configuration Menu First, ensure that the units are set as desired by selecting the Locale link from the Configuration menu. -
Page 29: Figure 3-5: Date And Time Configuration
It is important to verify that the Date, Time, and Timezone are set properly for the site. The date and time are relied on for logs, timer control, trends, etc. Setting the timezone properly ensures that daylight savings time adjustments will be accounted for automatically. -
Page 30: Figure 3-7: Control Settings
Control Settings The settings under the Control Menu determine how the machine operates to match the process requirements of the customer. The default settings of the machine are acceptable for most installations. However, if the Pressure Band displayed on the gauge on the Home screen does not match the desired pressure range for the site, the Pressure Band must be adjusted. -
Page 31: Figure 3-8: Primary Pressure Band Setting
The p1 Pressure Band Setting screen is shown in Figure 3-8 below. The bar graph gives a visual indication of the pressure band settings. Press the numerical value boxes to make adjustments as needed. Note that the minimum and maximum values that will be allowed for each box will change dynamically based on the design pressure of the machine as well as the values of the other settings. -
Page 32: Figure 3-9: Active Alarms Screen
Clearing Alarms If there are any faults present on the machine, they must first be cleared to allow the machine to be started. If the machine has been powered on recently and Auto Restart is not enabled, a Power Loss fault will be present. If a fault is active on the machine, the Active Alarms screen can be accessed by pressing on the Alarm triangle on the Message Status Bar on the Home screen, or by navigating to Alarms ->... -
Page 33: Figure 3-10 - Jogs Motor Screen
Jogging the Motors If this is the first time that the machine has been started after being connected to power, the motors must be jogged to verify correct rotation. To do this, you must be logged in as a Technician. After logging in, navigate to Diagnostics ->... -
Page 34: Section 4, Controls & Instrumentation
CONTROLS & INSTRUMENTATION GENERAL DESCRIPTION The Gardner Denver rotary screw compressor is pre-wired with all controls, motor and starter to match specific voltage and horsepower as ordered. It is necessary only to connect the compressor unit to the correct power supply and to the shop air line. A standard package unit consists of the modular compressor assembly, air/oil cooling and filtration system, control components, electric motor drive, associated starting module, sound attenuation metal enclosure and common support steel base. -
Page 35: Figure 4-2 Schematic Tubing Diagram
Operation of the unit with improper relief valve setting can result in severe personal injury or machine damage. Ensure properly set valves are installed and maintained. 316EBD797-01 (Ref. Drawing) FIGURE 4-2 SCHEMATIC TUBING DIAGRAM 13-21-614 v01 Page 34... -
Page 36: Figure 4-3 Minimum Discharge Pressure/Check Valve
Blowdown Valve ( ) This valve normally is used for control functions, but also serves to Figure 4-2, page 34 relieve reservoir pressure following a shutdown. The blowdown valve is a two-way solenoid valve which is piped into the oil reservoir outlet ahead of the minimum pressure valve. When the solenoid is de- energized, the valve opens and the coolant system is blown down. -
Page 37: Figure 4-4 Inlet Valve
To service the valve, make sure all pressure is relieved, disconnect the unit from the power supply, lockout and tagout, then unscrew the valve cap from the body. The internal parts will come out after the cap has been removed. Repair kits are available from your local authorized Gardner Denver distributor. 302EBD797 (Ref. - Page 38 Solenoid Valves IVC and IVO - These valves control position of the inlet valve in response to signals from the Governor Controller. With both valves de-energized, the normally open IVC valve allows control pressure to the inlet piston to close the valve. If IVC only is energized, the inlet valve is held in its current position.
- Page 39 Plant Delivery Pressure Transducer - This transducer is connected after the aftercooler. It converts the pressure in the plant air system into an electrical signal for use by the Governor Controller for modulation and control. Separator Pressure Transducer - This transducer is connected after the minimum pressure valve. Its signal is used to monitor the condition of the air/oil separator and cooler.
- Page 40 Power Supply - This device changes the incoming AC supply voltage to 24 volts DC for use by all unit control devices. For 575 volt AC units only, a control transformer is provided to supply 120 volts AC input to the power supply. A secondary fuse is provided on the control transformer. Refer to adjacent labeling for replacement information.
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Page 41: Figure 4-5 Control Schematic, Compressor Unloaded, Constant Speed Mode
313EBD797-01 (Ref. Drawing) FIGURE 4-5 CONTROL SCHEMATIC, COMPRESSOR UNLOADED, CONSTANT SPEED MODE 13-21-614 v01 Page 40... -
Page 42: Figure 4-6 Control Schematic, Compressor At Full Load, Constant Speed Mode
314EBD797-02 (Ref. Drawing) FIGURE 4-6 CONTROL SCHEMATIC, COMPRESSOR AT FULL LOAD, CONSTANT SPEED MODE 13-21-614 v01 Page 41... -
Page 43: Figure 4-7 Control Schematic, Compressor Unloaded, Low Demand Mode Or Auto Mode
315EBD797-01 (Ref. Drawing) FIGURE 4-7 CONTROL SCHEMATIC, COMPRESSOR UNLOADED, LOW DEMAND MODE OR AUTO MODE 13-21-614 v01 Page 42... -
Page 44: Figure 4-8 - Wiring Diagram Chart
Wiring Diagrams: Figures 4-9 thru 4-15 are included only to show an example wiring diagram. Please refer to Figure 4-8 to identify the correct wiring diagram for a specific unit before doing any service or diagnostics on the electrical system. WIRING VOLTAGE STARTER DIAGRAM... -
Page 45: Figure 4-9 - Wiring Diagram, Wye Delta (Air Cooled / Water Cooled)
FIGURE 4-9 WIRING DIAGRAM, WYE DELTA, AIR COOLED / WATER COOLED, 40/50 HP, 380-415/460 VOLT 324EBF546-02 (Ref. Drawing) Page 2 of 12 13-21-614 v01 Page 44... - Page 46 FIGURE 4-10 WIRING DIAGRAM, WYE DELTA, AIR COOLED / WATER COOLED, 40/50 HP, 380-415/460 VOLT 324EBF546-02 (Ref. Drawing) 13-21-614 v01 Page 45 Page 3 of 12...
- Page 47 FIGURE 4-11 WIRING DIAGRAM, WYE DELTA, AIR COOLED / WATER COOLED, 40/50 HP, 380-415/460 VOLT 324EBF546-02 (Ref. Drawing) Page 4 of 12 13-21-614 v01 Page 46...
- Page 48 FIGURE 4-12 WIRING DIAGRAM, WYE DELTA, AIR COOLED / WATER COOLED, 40/50 HP, 380-415/460 VOLT 324EBF546-02 (Ref. Drawing) 13-21-614 v01 Page 47 Pages 5 & 6 of 12...
- Page 49 FIGURE 4-13 WIRING DIAGRAM, WYE DELTA, AIR COOLED / WATER COOLED, 40/50 HP, 380-415/460 VOLT 324EBF546-02 (Ref. Drawing) Page 7 of 12 13-21-614 v01 Page 48...
- Page 50 FIGURE 4-14 WIRING DIAGRAM, WYE DELTA, AIR COOLED / WATER COOLED, 40/50 HP, 380-415/460 VOLT 324EBF546-02 (Ref. Drawing) Page 8 of 12 13-21-614 v01 Page 49...
- Page 51 FIGURE 4-15 WIRING DIAGRAM, WYE DELTA, AIR COOLED / WATER COOLED, 40/50 HP, 380-415/460 VOLT 324EBF546-02 (Ref. Drawing) Pages 9, 10, & 11 of 12 13-21-614 v01 Page 50...
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Page 52: Section 5 Lubrication Oil Cooler, Oil Filter & Separator
AEON lubricants are available through your authorized Gardner Denver compressor distributor. OIL SPECIFICATIONS - The factory fill compressor lubricant is Gardner Denver AEON 9000SP lubricating coolant which can be used for year-round operation. AEON 9000SP is a synthetic, extended life lubricant which can extend lubricant change intervals up to 4 times that of a petroleum based lubricant. - Page 53 HIGH TEMPERATURE OPERATION - Gardner Denver AEON 9000 SP lubricating coolant will operate at a sustained discharge temperature up to 210F (99C). When unusually high ambient air temperature is encountered, it will shorten the lubricant life; see Figure 5-6, page 60.
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Page 54: Figure 5-1 Dew Point Chart F
Figure 5-1 DEW POINT CHART F DEW POINT CHART C Figure 5-2 These charts are easily used by reading the ambient temperature along the bottom axis of the chart and then reading the appropriate pressure curve to determine the corresponding dew-point temperature on the left axis of the chart. -
Page 55: Figure 5-3 - Flow Diagram, Air/Oil System
300EBD797-03 (Ref. Drawing) Figure 5-3 FLOW DIAGRAM, AIR/OIL SYSTEM 13-21-614 v01 Page 54... -
Page 56: Figure 5-4 Oil Flow Diagram, Remote Overhead Mounted Cooler
305EBD797-01 (Ref. Drawing) Figure 5-4 OIL FLOW DIAGRAM, REMOTE OVERHEAD MOUNTED COOLER 13-21-614 v01 Page 55... - Page 57 REMOTE MOUNTED ELEVATED COOLER ASSEMBLY PROCEDURE - The Compressor package will be built and tested with the coolers mounted on the package. On enclosed units, the fan motor will be disconnected after test and the vent fan motor connected in its place. The vent fan will be mounted in the enclosure.
- Page 58 NOTICE When removing the cooling module from the package for remote operation, do not use the flexible coupling (when supplied) between the air/oil separator housing and the minimum pressure/check valve. The discharge piping from the air/oil separator housing should be piped into the minimum pressure/check valve, then into piping to the cooler, with a flexible connection between the minimum pressure/check valve and aftercooler to keep the weight of the piping off of the cooler.
- Page 59 COLD AMBIENT OPERATION - See “Installation for Cold Weather Operation,” Section 2. ADDITION OF OIL BETWEEN CHANGES must be made when the oil level is in the red range on the gauge as read while the unit is on. To add oil, follow these steps: Be sure the unit is completely off and that no air pressure is in the oil reservoir.
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Page 60: Figure 5-5 Oil Level Gauge
Operating conditions and the appearance of the drained oil must be surveyed and the oil change intervals planned accordingly by the user. Gardner Denver offers a free oil analysis program with the AEON lubricants and we recommend a sample be sent in at 100 hours on a new unit. -
Page 61: Figure 5-6 Oil Change Interval
Discharge AEON 4000 AEON 9000SP Temperature Change Interval Change Interval 4000 hrs. 8000 hrs. Up to 180 F (82 C) 3000 hrs. 6000 hrs. 180 F to 190 F (82 C to 88 C) 2000 hrs. 4000 hrs. 190 F to 200 F (88 C to 93 C) 1000 hrs. -
Page 62: Figure 5-7 Approximate Oil System Capacities
FILLING OIL RESERVOIR Air/oil under pressure will cause severe personal injury or death. Shut down compressor, relieve system of all pressure, disconnect, lockout and tagout power supply to the starter before removing valves, caps, plugs, fittings, bolts and filters. Be sure the unit is completely off and that no air pressure is in the oil reservoir. Disconnect, lockout and tagout the power supply to the starter. - Page 63 COMPRESSOR OIL FILTER (Figure 5-3, Page 54) - This screw on oil filter is a vital part in maintaining a trouble-free compressor, since it removes dirt and abrasives from the circulated oil. The oil filter relief valve is located in the oil filter head. The relief valve opens in the event the element becomes dirty enough to block the flow of oil.
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Page 64: Figure 5-8 - Thermostatic Mixing Valve Element
COMPRESSOR OIL COOLER - RADIATOR TYPE (Figure 1-5, page 10) - The oil cooler motor and fan is mounted on the oil cooler module; air is exhausted through the oil cooler and away from the unit. Do not obstruct air flow to and from the oil cooler. Allow a minimum of three (3) feet clearance around the cooler. Keep both faces of cooler core clean for efficient cooling of compressor oil. -
Page 65: Figure 5-9 - Water Control Valve
It is mandatory that any water-cooled unit be installed in a shelter heated to temperatures above freezing (32F, 0C). Oil cooler malfunction may be traced by checking pressure at oil inlet and outlet. At normal operating air service pressure (65 psig to 150 psig, 4.5 bar to 10.3 bar) with the unit warm, a pressure drop of 3 psi to 15 psi (.2 bar to 1 bar) can be expected between the oil inlet and the oil outlet. - Page 66 WATER FLOW CONTROL VALVE FOR HEAT EXCHANGER (Optional Equipment) (Figure 5-9, page 64) The water flow control valve is adjustable to compensate for varying water inlet temperatures and pressures and is to be mounted in the water outlet line after the oil cooler (Figure 5-3, page 54). Use the compressor discharge air temperature gauge on the instrument panel in setting the flow control valve.
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Page 67: Figure 5-10 - Oil Separator
WATER SHUTOFF VALVE - WATER-COOLED HEAT EXCHANGER (Optional Equipment) (Figure 5-3, page 54) - A magnetic solenoid-operated water shutoff valve rated at 150 psig (10.3 bar) water pressure should be mounted in the water outlet line after the oil cooler. The valve should be wired into the compressor control circuit so that the valve opens to allow water to flow any time the compressor is running. - Page 68 Oil carryover malfunctions of the oil separator are usually due to using elements too long, heavy dirt or varnish deposits caused by inadequate air filter service, use of improper oil or using oil too long for existing conditions. A ruptured or collapsed separator element is usually due to heavy dirt or varnish buildup in the filtering material.
- Page 69 Removal of Oil Separator for Inspection or Replacement: Air/oil under pressure will cause severe personal injury or death. Shut down compressor, relieve system of all pressure, disconnect, lockout and tagout power supply to the starter before removing valves, caps, plugs, fittings, bolts and filters.
- Page 70 Oil Cooler Oil Pressure Differential (Air-Cooled Radiator) - Check differential across oil system by measuring oil inlet pressure as described above. Oil Cooler Oil Pressure Differential (Water-Cooled Heat Exchanger) – 2 psid to 25 psid (.1 bar to 1.7 bar) (65 psig to 150 psig, 4.5 bar to 10.3 bar receiver pressure) - Check that oil inlet pressure is correct or measure the differential between drains on the oil cooler shell.
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Page 71: Section 6, Air Filter
IMPORTANT. An improperly maintained air filter can cause a loss of compressor air delivery. Filter Element - Clean every 50 to 150 operating hours depending on dust conditions. NOTICE Use only genuine Gardner Denver air filter elements on Gardner Denver compressor units. Genuine parts are available through your authorized Gardner Denver distributor. - Page 72 Do not oil this element. Do not wash in inflammable cleaning fluids. Do not use solvents other than water. Improper cleaning may damage the element. NOTICE Never operate the unit without the element. Never use elements that are damaged, ruptured or wet. Never use gaskets that won't seal. Keep spare elements and gaskets on hand to reduce downtime.
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Page 73: Section 7, Coupling
SECTION 7 COUPLING Figure 7-1 INSTALLATION OF COUPLING CUSHIONS Rotating machinery can cause personal injury or death. Turn the unit completely off, open the main disconnect, lockout and tagout before servicing the coupling. COUPLING - The motor and compressor are direct connected by a resilient type flexible coupling with a single cushion. - Page 74 ASSEMBLY OF COUPLING ONTO THE AIREND AND MOTOR Figure 7-2 INSTALLATION OF COUPLING CUSHIONS Slide coupling halves over shaft extensions. Lock compressor half down with set screw. Assemble the motor to the compressor. Working through the coupling guard opening, slide motor half into compressor half. * After engaging each hub on the matching recesses of the coupling element, check that the gap between the hub flats (see dimension “E”...
- Page 75 NOTICE Elements with non-uniform cross sections must be mounted with the rotation arrow on the coupling the same direction as the rotation arrow on the airend. Incorrect rotation will greatly decrease the torque carrying capacity of the coupling. Rotating machinery can cause personal injury or death. Do not operate unit with either the coupling guard removed.
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Page 76: Section 8, Maintenance Schedule
SECTION 8 MAINTENANCE SCHEDULE Service Check List Every 8 hours operation 1. Check air/oil reservoir oil level, add oil if required. See Section 5 for information. If oil consumption is high, refer to Section 9, Excessive Oil Consumption. DO NOT MIX LUBRICANTS. 2. - Page 77 Maintenance Schedule Check air/oil reservoir oil level Check operation of the machine, is it loading and unloading Check discharge pressure and temperature Check control panel for advisory text messages Inspect, Clean if necessary Cooler / Fan Replace oil filter element Replace Control Box Filter (if app.) Replace package enclosure filter pad (if app.) Replace air filter element...
- Page 78 Maintenance Schedule Check air/oil reservoir oil level Check operation of the machine, is it loading and unloading Check discharge pressure and temperature Check control panel for advisory text messages Inspect, Clean if necessary Cooler / Fan Replace oil filter element Control Box Filter (if app.) Replace cool air inlet filter pad (if app.) Replace air filter element...
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Page 79: Section 9, Troubleshooting
SECTION 9 TROUBLESHOOTING SYMPTOM POSSIBLE CAUSE REMEDY Compressor fails to start Wrong lead connections. Change leads. Blown fuses in control Replace fuse. box. Motor starter overload Reset and investigate tripped. cause of overload. Pressure in reservoir. Inspect blowdown valve. Read error message on Take appropriate action. - Page 80 SYMPTOM POSSIBLE CAUSE REMEDY Compressor starts too Wye Delta switch time set Contact your distributor. slowly too long. Minimum Pressure/Check Repair or replace. Valve is faulty. Supply voltage is too low. Check the supply voltage. Compressor is low on Restricted air filter. Clean or replace filter.
- Page 81 NOTICE Gardner Denver factory remanufactured replacement compressor airend units are available from your authorized distributor, on an exchange basis, for all rotary screw compressor units. 13-21-614 v01 Page 80...
- Page 82 Electra Saver II and Electra Saver Series Gardner Denver (the “Company”) warrants to each original retail purchaser (“Purchaser”) of its new products from the Company or its authorized distributor that such products are, at the time of delivery to the Purchaser, free of defects in material and workmanship.
- Page 83 NOTES: 13-21-614 v01 Page 82...
- Page 84 For additional information, contact your local representative or visit: www.contactgd.com/compressors ©2020 Gardner Denver, Inc. Printed in U.S.A.