Why is the discharge pressure too high in my GEA Grasso 5 Air Compressor?
If the discharge pressure of your GEA Air Compressor is too high, it might be due to several reasons: * The discharge stop valve may not be fully open. In this case, open it fully. * The discharge pressure gauge could be defective, requiring repair or replacement. * There might be non-condensables in the system. Purge the system using an automatic purger.
What to do if the suction pressure is too high on a GEA Grasso 5 Air Compressor?
If the suction pressure of your GEA Air Compressor is too high, possible causes include: * The capacity control isn't working correctly; it needs repair. * The compressor capacity might be too small; refer to the plant design. * The suction pressure gauge is defective; repair or renew it. * One or more suction valves are defective; renew the suction valve rings. * One or more discharge valves are defective; repair or renew them. * The pressure relief valve is leaking; repair or renew it.
How to troubleshoot high discharge temperature on a GEA Air Compressor?
If the discharge temperature of your GEA Air Compressor is too high, consider these potential causes: * High discharge pressure (see section A). * Too many cylinders are cut out; cut in more cylinders. * Low suction pressure (see section D). * Excessive superheat of suction gas; eliminate the superheat. * Improper interstage cooling in two-stage compressors; repair the cooling system. * High room temperature; improve engine room ventilation. * Defective discharge valve; repair or renew it. * Leaking pressure relief valve; repair or renew it.
What causes low suction pressure in a GEA Grasso 5 and how to fix it?
If the suction pressure of your GEA Air Compressor is too low, check the following: * Ensure the suction stop valve is fully open; if not, open it fully. * The suction gas strainer might be blocked; renew it. * The injection control may not be adjusted correctly; readjust it. * There might be too little refrigerant in the installation; top it up. * The suction pressure gauge could be defective; renew it.
Why is the lubricating oil pressure too low in my GEA Grasso 5?
If your GEA Air Compressor has too low lubricating oil pressure, consider the following: * Ensure there's enough oil in the crankcase by checking the oil return from the oil separator and topping up the oil if needed. * A disturbed oil circuit due to a dirty oil suction or discharge filter; renew the element of the oil suction filter and/or oil discharge filter. * The lubricating oil pressure regulator may not be adjusted properly or is defective; readjust or renew it. * Liquid refrigerant in the crankcase (see section E). * A defective oil pressure and/or suction pressure gauge; repair or replace it. * Worn bearings; renew them.
What to do if the crankcase of my GEA Air Compressor is frosted or wet?
If the crankcase of your GEA Air Compressor is frosted or wet, it's likely due to liquid refrigerant. This can happen because: * The room temperature is too low. Provide crankcase heating or check its operation. * Oil return from the separator contains liquid refrigerant. Consult the plant manual. * The installation operates too wet. Readjust the installation and provide for superheat. * The liquid separator is too small. Consult the plant manual.
What causes too high oil consumption in a GEA Air Compressor?
If your GEA Air Compressor is experiencing too high oil consumption, it could be due to: * Using the wrong type of oil (too thin). Change the oil type according to the oil lubrication oil table. * The compressor operates unloaded too frequently. Refer to design calculations. * No return from the oil separator. Check the operation of the float valve in the oil separator.
Why is the oil pressure too high in my GEA Grasso 5 Air Compressor during normal operation?
If the lubricating oil pressure is too high during normal operation at working temperature in your GEA Air Compressor, it could be due to: * A lubricating oil pressure regulator that is not adjusted properly or is defective. Re-adjust or renew it. * A defective oil pressure and/or suction pressure gauge (if present). Repair or replace it.
Why are all cylinders inactive on my GEA Grasso 5 Air Compressor while it's running?
If all cylinders are inactive while your GEA Air Compressor is operating, it could be caused by: * Oil pressure for the valve lifting mechanism being too low (see section J). * Incorrect wiring of the capacity control. Refer to the “Product Information”.
What causes too low or no control oil pressure in a GEA Grasso 5 (Not or Grasso 5HP)?
If your GEA Air Compressor (Not or Grasso 5HP) has too low or no control oil pressure, it could be due to: * Failure of the control oil pressure regulator in the oil pump. Readjust or renew the regulator. * A lack of oil in the oil system. Add oil to the system. * An oil pump defect. Repair or renew the oil pump.
General| Brand | GEA |
|---|---|
| Model | Grasso 5 |
| Category | Air Compressor |
| Language | English |
Contractor/installer responsibility for examining information and taking additional safety measures.
Respect federal, state, local safety regulations during installation, connection, and operation.
Mandatory: No changes to pressurized parts like crankcase housing or suction filter housing.
Install running-in oil filter after overhaul/repair for 100-200 hours of operation.
Ensure dual safety valve is fitted onto oil separator if included.
Key steps before initial start-up: leveling, piping, pressure testing, evacuation.
Guidance on moving compressor packages and storing them safely to prevent damage and corrosion.
Instructions for safely hoisting a compressor package using dedicated hoisting eyes.
Ensuring sufficient space and proper concrete block mounting for the compressor package.
Guidelines for connecting the compressor to the refrigeration system pipework, including torque specifications for valves.
Connecting power supply, earthing, and handling separately delivered components.
Perform a system leak test over 24 hours using dry nitrogen to ensure a tight seal.
Procedure to evacuate and dry the refrigeration system using a vacuum pump and dry nitrogen.
Procedure for charging the compressor and oil separator with the correct type and amount of oil, including oil quantities.
Refrigerant charging should be done by qualified engineers according to the plant manual.
Adjusting control devices, pressure settings, and oil pressure regulators.
Verify motor rotation and install drive guards before initial start-up.
Warm up oil and follow start-up procedures, considering limitations and solenoid logic.
Special instructions required for frequency controlled compressors.
A comprehensive checklist to ensure all critical items are verified before compressor start-up.
Detailed procedures for first start, restarts, and stopping the compressor.
Guidelines for performing regular inspections during shut-down periods to ensure readiness.
Detailed checklist for periodical inspections covering various parameters like oil, pressure, and V-belts.
Steps to follow for shutting down the compressor for longer periods (> 6 months).
Covers lubrication data, oil changes, filter replacement, and oil topping-up procedures.
Procedures for dismantling, inspecting, and re-assembling suction and discharge valves.
Procedure to purge the compressor after maintenance jobs using vacuum and pressure checks.
A table to help trace and remedy failures interfering with proper compressor operation, referring to installation issues.
Information on how to obtain a complete spare parts overview from GEA website or sales representative.
Maintenance tasks to perform after the initial 100 operating hours, including oil drain/refill and filter replacement.
Guidance on first maintenance activities, especially after refrigerating plant modification, including oil change.
Details on maintenance schedules (A, B, C) based on operating hours or GMM/GEA Omni™ controller.
Detailed descriptions of Maintenance A (visual inspections), B (valve overhaul), and C (major inspection).
Explanation of codes and actions used in service and maintenance intervals for various maintenance types.
General remarks and checklists for maintaining the Grasso V (HS, HP) series compressors.
Comprehensive tables detailing maintenance intervals and activities for various compressor systems and components.
Identifies the most operated cylinders for different compressor sizes, relevant for maintenance focus.
Checklist for inspecting package components to ensure proper function and maintenance.
Information on the microprocessor-controlled maintenance monitor for flexible maintenance and cost optimization.
Key operational limits for Grasso V compressors to ensure safe and efficient operation.
Important procedures for starting two-stage compressors, including capacity control and solenoid valve operation.
Diagrams illustrating solenoid valve/cylinder numbering for electric capacity control in single stage and booster systems.
Diagrams illustrating solenoid valve/cylinder numbering and capacity control steps for two-stage compressors.
Recommendations for choosing and using lubricating oils, including strongly recommended types and accepted NH3 oil types.
Explains the necessity and procedure for pre-lubricating the compressor oil system before start-up.
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