How to fix high discharge pressure on GEA Grasso V Compressor?
To address high discharge pressure in your GEA Compressor, first, ensure the discharge stop valve is fully open. If the issue persists, the discharge pressure gauge might be defective and require repair or replacement. Another potential cause is non-condensables in the system, which can be resolved by purging with an automatic purger.
Why is the discharge temperature too high on my GEA Compressor?
Several factors can cause a GEA Compressor's discharge temperature to rise excessively. High discharge pressure, too few cylinders in operation, low suction pressure, or excessive superheat of suction gas can all contribute. For two-stage compressors, improper interstage cooling could be the cause. Additionally, high room temperature, a defective discharge valve, or a leaking pressure relief valve might be responsible. You may need to cut in more cylinders, eliminate excessive superheat, better ventilate the engine room, repair or renew the discharge valve, or repair or renew the pressure relief valve. If the discharge pressure or suction pressure are too high or low, consult the manual.
What to do if suction pressure is too low on GEA Grasso V Compressor?
If the suction pressure of your GEA Compressor is too low, start by ensuring the suction stop valve is fully open. A blocked suction gas strainer can also cause this issue, so renew it. Check and readjust the injection control if it's not correctly adjusted. Additionally, insufficient refrigerant in the installation or a defective suction pressure gauge could be the cause; top-up with refrigerant or renew the gauge as needed.
What causes high suction pressure in GEA Grasso V?
High suction pressure in a GEA Compressor can stem from several causes. The capacity control might not be operating correctly and needs repair. The compressor capacity could be too small, in which case you should refer to the plant design. Other potential causes include a defective suction or discharge pressure gauge, defective suction or discharge valves, or a leaking pressure relief valve. Repair or renew the relevant components as necessary.
Why is the lubricating oil pressure too low in my GEA Grasso V Compressor?
Several issues can lead to low lubricating oil pressure in your GEA Compressor. First, ensure there is enough oil in the crankcase by topping it up. A disturbed oil circuit due to a dirty oil suction and/or discharge filter can also be the cause; renew the filter elements. Other potential causes include a lubricating oil pressure regulator that is not adjusted properly or is defective, liquid refrigerant in the crankcase, a defective oil pressure and/or suction pressure gauge, or worn bearings. Re-adjust or renew the regulator, repair or renew the gauge, or renew the bearings as needed. For liquid refrigerant in the crankcase, consult the manual.
How to reduce oil consumption in GEA Grasso V?
Excessive oil consumption in a GEA Compressor can be attributed to several factors. Ensure the oil type matches the oil lubrication table; if it's too thin, change it. Infrequent loading of the compressor, a lack of return from the oil separator, a clogged restriction plug in the cylinder's suction chamber, worn oil scraper rings, oil leakage, a leaking shaft seal, or an excessively high oil level in the crankcase can also contribute. Clean the plug, replace the rings, repair any leaks, repair the shaft seal, or drain/refill with oil as needed. For compressor operation or initial oil charge, consult the design calculations or relevant section.
Why is the crankcase frosted on my GEA Grasso V Compressor?
A frosted or wet crankcase in a GEA Compressor can be caused by liquid refrigerant entering the crankcase, low room temperature, oil return from the separator containing liquid refrigerant, or the installation operating too wet. If liquid refrigerant is present, stop the compressor and contact an installation engineer. If the room temperature is too low, provide crankcase heating or check its operation. Re-adjust the installation and provide for superheat. For oil return or liquid separator issues, consult the plant manual.
What causes high oil pressure in GEA Grasso V during normal operation?
If the oil pressure is too high during normal operation of your GEA Compressor, the lubricating oil pressure regulator may not be adjusted properly or could be defective. Additionally, a defective oil pressure and/or suction pressure gauge could be the cause. Try re-adjusting or renewing the regulator, or repair or replace the defective gauge.
What causes low control oil pressure in GEA Compressor?
If there's too little or no control oil pressure in your GEA Compressor, the control oil pressure regulator in the oil pump might have failed. Also, there might be a lack of oil in the oil system, or the oil pump itself could be defective. Try re-adjusting or renewing the regulator, adding oil to the system, or repairing or renewing the oil pump.
General| Brand | GEA |
|---|---|
| Model | Grasso V Series |
| Category | Compressor |
| Language | English |
Overview of installation and maintenance instructions for GEA Grasso V compressors.
Explanation of safety symbols like Danger, Warning, Caution, and Notice.
General safety guidelines and specific warnings for compressor operation and construction.
Information regarding compressor filling (nitrogen) and warranty chart requirements.
Notes on documentation availability and generic paragraphs in technical manuals.
Information on compliance with Pressure Equipment and Machine Directives.
Illustration and explanation of cylinder numbering on a 6-cylinder compressor.
Defines booster and single-stage operation based on condensing temperature.
Key setup parameters for Grasso V compressors including start frequency, time intervals, and temperatures.
Requirement for running-in oil filter and initial installation steps for the compressor package.
Guidelines for moving, hoisting, and ensuring adequate space around the compressor.
Requirements for concrete block foundations and anchoring methods for the compressor.
Instructions for connecting system pipework and electrical power supply.
Guidance on earthing connections and handling separately delivered components.
Procedures for leak testing the system and evacuation/drying the refrigerating system.
Instructions for charging the compressor with oil and refrigerant.
Details on adjusting control devices and pressure settings.
Procedure for re-adjusting lubrication and control oil pressure regulators.
Guidelines for initial start-up, part load operation, and wiring logic.
Checklist for pre-start verification and procedures for the first start.
Instructions for restarting the compressor after short or long standstill periods.
Procedure for safely stopping the compressor.
Guidelines for performing periodical inspections during shutdown periods.
Checklist for periodical inspections and steps for longer shutdown periods.
Information on lubrication data, topping up oil, and system evacuation.
Procedures for evacuation, leak testing, and start-up after servicing.
Instructions for draining and changing oil, and replacing oil filters.
Guidance on dismantling valves and compressor purging after maintenance.
Introduction to the troubleshooting table for tracing and remedying failures.
Table detailing common faults, their causes, and recommended remedies for compressor issues.
Information on spare parts manuals and post start-up maintenance tasks.
Explanation of the SMS factor and legend for service and maintenance schedules.
Description of maintenance levels (A, B, C) when using the Grasso Maintenance Monitor (GMM).
Detailed checks for compressor components as part of maintenance schedules.
Checklist for various package components during maintenance.
Service and maintenance schedules for Grasso V compressors when GMM is not applied.
Overview of the Grasso Maintenance Monitor for flexible maintenance scheduling.
Specifies the general limits of operation for Grasso V compressors.
Procedure for starting up two-stage compressors from standstill.
Describes fast pull-down procedures for two-stage compressor part-load control.
Diagrams for solenoid valve/cylinder numbering for electric capacity control.
Diagrams for solenoid valve/cylinder numbering for two-stage compressors.
Guidance on selecting and recommending appropriate lubricating oils.
Lists of strongly recommended and accepted oil types for NH3 refrigeration.
Explanation of the pre-lubrication oil system and its importance.
General information about GEA Group as a global engineering company.
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