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Summary of Contents for CompAir GD7TNL
- Page 1 RELEASED 30/Sep/2024 13:14:54 GMT 47877836 Revision A September 2024 Concentric Ring Valve Non-Lubricated Cylinder Type Compressors For Oil-Free Air Models GD7TNL & GD15TNL Owner’s Manual Owner’s Manual Save These Instructions...
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Page 2: Table Of Contents
RELEASED 30/Sep/2024 13:14:54 GMT CONTENTS GENERAL SAFETY GUIDELINE . . . . . . . . . . . . . . . . . . . .3 STARTING UNLOADING . -
Page 3: General Safety Guideline
Should the purchaser and/or User fail to add such specialized equipment, and proceed to use the air compressor for breathing air service, the Purchaser/User assumes all liability resulting therefrom without any responsibility or liability being assumed by CompAir company. Hazardous vapors. Can cause severe nausea, fainting or death. - Page 4 RELEASED 30/Sep/2024 13:14:54 GMT Pressure switch and unloader valve operation is related to moter/engine horsepower, air receiver rating, and relief valve setting. DO NOT ATTEMPT TO ADJUST, REMOVE OR BYPASS THE PRESSURE SWITCH, OR CHANGE OR MODIFY ANY PRESSURE CONTROL RELATED DEVICE. Do not use any air tools or attachments without first determining the maximum air pressure recommended fot that particular piece of equipment.
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Page 5: General Description
„ APPLICATION „ PRINCIPLE OF OPERATION CompAir non-Lubricated units are two stage. single-acting, The design of the Models GD7TNL and GD15TNL compressors that do not require installation on a special Compressor differs from conventional units primarily in the foundation. All models can be furnished as compact, self- pistons and rings. - Page 6 This pressure is piped across to all cylinders for the satisfactory operation of the compressors. The Model GD7TNL and GD15TNL, if regulated by Constant Speed Control, has special provisions made for maintaining this oil suppressing air pressure whenever the compressor operates in the unload cycle.
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Page 7: Recommendations
Such filtration IMPORTANT NOTE: The purchaser assumes title to the equipment is available from your local CompAir Distributor. compressor equipment at the manufacturers shipping dock. Immediately upon receipt of the equipment, it should be inspected for any damage that may have occurred during shipment. -
Page 8: Step 5 - Electrical Wiring
RELEASED 30/Sep/2024 13:14:54 GMT Should a concrete base be necessary, make certain the RECOMMENDED CABLE SIZE foundation bolts are positioned correctly to accept the receiver feet, and that these bolts project at least 1” (25.4 ALUMINIUM COPPER mm) above the surface of the foundation. The unit must be levelled and bolted in a manner which avoids pre-stressing the receiver in orde;to prevent vibration and insure proper operation. -
Page 9: Step 6 - Compressor Start-Up
Note the pressure at which the instructions for installation. CompAir cannot accept compressor starts/reloads. If the unit does not Start and responsibility for damages arising from failure to provide Stop/Load and Unload at the correct pressure you may adequate motor protection. -
Page 10: Step 9 - Discharge Piping
SHUT-DOWN IMMEDIATELY, AND CALL YOUR LOCAL detached receiver. Discharge piping should be the same COMPAIR DISTRIBUTOR. size as the compressor discharge connection or the receiver discharge connection. All pipe and fittings must be certified STEP 8 - LOW OIL LEVEL SWITCH (OPTIONAL &... - Page 11 If any defects are apparent in the equipment; contact the nearest CompAir Distributor or CompAir District office. The CompAir service literature included with the unit has instructions for minor adjustments. Minor adjustments are not considered warranty.
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Page 12: Regulation
Figure 4-1 Typical constant speed control arrangement „ AUXILLARY VALVE ADJUSTMENT NOTICE For GD7TNL and GD15TNL, Automatic start and stop The auxiliary valve should be mounted on the receiver, If control, Dual controls are not applicable. possible, and piped to the unloaders. Install the auxiliary valve in the vertical position at a location that is free of vibrations. -
Page 13: Intermittent Duty Formula
RELEASED 30/Sep/2024 13:14:54 GMT To adjust the differential pressure, (See Figure 4-3), loosen the differential locknut and turn the differential nut clockwise for greater differential and counterclockwise for less differential. While adjusting the differential nut, the range locknut should be loosened and the range adjustment screw must be held from turning to avoid changing the cut-out pressure. -
Page 14: Operation
Frame oil capacity for the Model GD7TNL is 2.3 The viscosities given in the table are intended as a general liters, and the Model GD15TNL is 4.7 liters. -
Page 15: Air Inlet Filter/Silencer
All applications of this nature should be referred to the WARNING nearest CompAir sales office or distributor. This machine contains high pressure „ BREATHER TRAP air which can cause injury or death... -
Page 16: Starting Unloading
RELEASED 30/Sep/2024 13:14:54 GMT WARNING This machine contains high pressure air which can cause injury or death from flying parts If a aftercooler or any other restriction is added to the compressor discharge, a safety valve must be installed between the compressor discharge and the restriction. -
Page 17: Distance Piece Pressure System
If leakage still exists repeat the above steps. If leaking cannot be stopped by adjustment, replacement of the pilot The Model GD15TNL is similiar in operation to the GD7TNL. valve may be required. Use the above procedure, starting An injected air flow from the air receiver to the distance with step four, when installing the new pilot valve. - Page 18 RELEASED 30/Sep/2024 13:14:54 GMT Figure 5-5 Compressor identification chart (shown image is for illustration purpose only) LEGEND - MODEL GD7TNL Distance Piece Balanced Pressure Line Distance Piece Air Pressure Gauge Cylinder Relief Valve Cylinder Relief Valve Line Pilot Valve Frame Vent...
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Page 19: Troubleshooting Guide
RELEASED 30/Sep/2024 13:14:54 GMT TROUBLESHOOTING GUIDE TROUBLE CHECK POINT NUMBERS Oil in disch air ......................... 8-10-24-33-35-36-37 Knocks or rattles ......................2-3-20-21-22-23 Water hammer (on units equipped with Water-cooled aftercoolers)..26 Air delivery has dropped off ..................1-2-6-18-20-29 Intercooler safety valve pops or high pressure gauge reading ....20-31 Trips motor overload or draws excessive current .......... - Page 20 RELEASED 30/Sep/2024 13:14:54 GMT CHECK POINT CAUSE NUMBER Leaking, broken, or loose valves Leaking, broken or worn constant speed unloader parts. Aux. valve dirty, seats worn Worn or scored connecting rod, piston pin or crank pin bearnings Defective ball bearing on crankshaft or on motor shaft. Loose motor fan Oil control ring broken or not seated in, stuck in groove, rough, scratched or excessive end gap (over .020”...
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Page 21: Maintenance
RELEASED 30/Sep/2024 13:14:54 GMT MAINTENANCE WARNING This machine contains high pressure air Hazardous voltage. which can cause injury or death from Can cause severe injury or death, flying parts Always release pressure from compressor and air Disconnect main power before servicing compressor receiver before removing caps. - Page 22 RELEASED 30/Sep/2024 13:14:54 GMT SERVICE INTERVAL MAINTENANCE OPERATION Operating Hours/Months - whichever comes first 500/3 1000/6 1500/9 2000/12 2500/15 RECEIVER Drain condensate - Manual Daily Operate safety valves Monthly GENERAL Tighten or check all bolts Monthly Check for unusual noise and vibration Daily Inspect for air leaks Monthly...
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Page 23: Routine Inspection And Service
RELEASED 30/Sep/2024 13:14:54 GMT ROUTINE INSPECTION AND SERVICE „ GENERAL Replace the air head gasket on the cylinder; then replace the air head. Tighten the air head capscrews to the torque The maintenance section of this book covers only those recommended below and replace the unloader if the unit operations with which maintenance personnel may not is so equipped. -
Page 24: Torque Values
RELEASED 30/Sep/2024 13:14:54 GMT „ TORQUE VALUES We recommend the use of a torque wrench on all bolts, capscrews, and nuts using the values in the following table. The values given are for threads lubricated with oil or grease. NATIONAL COARSE GRADE 2 GRADE 5 GRADE 8... -
Page 25: Belt Installation And Adjustment
RELEASED 30/Sep/2024 13:14:54 GMT „ BELT INSTALLATION AND ADJUSTMENT When installing new belts, do not pry the belts over the pulley grooves. The proper method of removing and installing new belts is to loosen the anchor screws and the belt tightener screw, Figure 8-2, and push the motor toward the compressor. -
Page 26: Crankshaft Assembly Replacement
RELEASED 30/Sep/2024 13:14:54 GMT „ CRANKSHAFT ASSEMBLY REPLACEMENT A new crankshaft assembly includes bearings, spacers, crank disc. etc., all of which are installed as a unit. To remove the old crankshaft and install a new one, proceed as follows: First remove the belt wheel, belt wheel key and shaft end cover. -
Page 27: Wiring Diagram
RELEASED 30/Sep/2024 13:14:54 GMT WIRING DIAGRAM DEFINITE PURPOSE MOTOR STARTER THREE PHASE MOTOR LEGEND: FU - Fuse, Control circuit LOLS - Switch, low oil level (optional) M - Coil, Motor starter OL - Overload, Motor starter PS - Switch, Pressure SS - Switch, Selector - ON/OFF NOTES: L 1, L2, L3, - INDICATES POWER SUPPLY LINE TERMINALS... - Page 28 RELEASED 30/Sep/2024 13:14:54 GMT Homepage: www.compair.com e-Mail: service_india@compair.com...
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