Johnson Controls Frick SGC 1913

Questions and Answers

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Wendy BestSep 12, 2025
What to do if there is rapid oil loss in my Johnson Controls Frick SGC 1913?
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  freemananthonySep 12, 2025
  Rapid oil loss with no oil level in the coalescer section sight glass in your Johnson Controls Air Compressor can occur if, on shutdown, the compressor unit suction check valve did not close, so repair the valve. The suction check valve bypass may be open too far, so close the valve. Coalescers may be loose or not seated properly, so correct or replace them. On an economized unit, the economizer check valve may not be working, so repair or replace it.
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Lauren OrtegaAug 23, 2025
Why is the discharge pressure excessively high in my Johnson Controls Frick SGC 1913?
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  Gerald PattersonAug 23, 2025
  Excessively high discharge pressure in your Johnson Controls Air Compressor can be due to several reasons. The safety cut-out might be set too low, so check the settings of alarms and warnings. There could be high discharge line loss, so inspect the valves. A malfunctioning condenser may also be the cause; check the condenser, liquid drain, refrigerant charge, water/air inlet temperature, and water/air flow. Finally, air or non-condensable gasses in the system can cause this issue, so purge the air from the condenser side.
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Lisa Hurst PhDAug 25, 2025
How to fix excessively low suction pressure in Johnson Controls Air Compressor?
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  Michael BlackburnAug 26, 2025
  Excessively low suction pressure in your Johnson Controls Air Compressor can be caused by a refrigeration load that's lower than the compressor capacity; in this case, reduce compressor capacity. It could also be due to high suction line loss, so check the valves and strainers. Another cause might be a malfunction of the evaporator, so inspect the evaporator for fouling or accumulated oil. Also, check the liquid expansion valve system, filter in the liquid line, and ensure there is sufficient refrigerant charge.
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igarciaAug 26, 2025
What to do if my Johnson Controls Frick SGC 1913 Air Compressor has excessive noise and vibration?
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  Stephanie MartinezAug 27, 2025
  Excessive noise and vibration in your Johnson Controls Air Compressor could stem from several issues. The main oil injection valve may be closed or open too far, so open or adjust it accordingly. Bearing damage or excessive wear can also cause this, requiring bearing replacement. Additionally, the slide valve/slide stop might be out of calibration, needing calibration. A loose coupling on the shaft should be tightened or replaced if damaged. Finally, refrigerant flood back (liquid slugging) can lead to these symptoms, so correct the underlying system problem.
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brett66Aug 29, 2025
Why won't the capacity slide valve move on my Johnson Controls Air Compressor?
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  Catherine WhiteAug 29, 2025
  If the capacity slide valve or slide stop on your Johnson Controls Air Compressor won't move, preventing unloading/loading, it could be due to insufficient oil pressure, so check the oil pressure. The solenoid coils might be burned out, requiring replacement. Incorrect valve settings in the hydraulic system could also be the cause, so check according to the hydraulic system description. Lastly, a malfunction of the 4-way control valve of slide components could be the issue, so check according to the description of main components.
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Scott RobinsonAug 31, 2025
What causes high suction pressure and insufficient refrigeration capacity in a Johnson Controls Frick SGC 1913 Air Compressor?
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  Janet HuntAug 31, 2025
  High suction pressure combined with insufficient refrigeration capacity in your Johnson Controls Air Compressor can occur if the compressor protection valve is opening or leaking, so check the discharge pressure safety cut-out settings and the pilot/main protection valve. An oil return valve that is fully open can also cause this issue, so adjust the regulating valve. Finally, a clogged suction strainer can lead to these symptoms, so clean the strainer.
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Victoria NovakSep 18, 2025
Why is grease leaking from the vent port of my Johnson Controls Frick SGC 1913?
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  roger44Sep 22, 2025
  Grease leaking from the vent port in the side of the pump body is normal and will cease after initial operation. However, black oil leaking from this vent indicates oil seal wear or failure. If leakage exceeds the normal allowable rate of 7 drops per minute, replace the seal.
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Russell PowellNov 26, 2025
Why is the oil temperature too high in my Johnson Controls Air Compressor?
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  Gregory KaiserNov 26, 2025
  High oil temperature in your Johnson Controls Air Compressor, accompanied by high discharge temperature, can be attributed to several factors. Check that the valves in the oil system are fully open. If you have a 3-way oil temperature control valve, check its function and replace the sensor element if needed. For water-cooled systems, check the oil cooler for fouling, water inlet temperature, and water flow. For refrigerant-cooled systems, check/drain accumulated oil in the oil cooler and ensure the gravity-fed refrigerant system is fully flooded. For liquid injection systems, check the settings in the control system, valves, and strainer in the liquid injection line. Also, verify that the compressor protection valve is not open or leaking by checking the discharge pressure safety cut-out ...
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Cody PhamSep 9, 2025
What causes gradual oil loss in my Johnson Controls Frick SGC 1913 Air Compressor?
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  juliathorntonSep 9, 2025
  Gradual oil loss in your Johnson Controls Air Compressor, with an oil level in the coalescer section sight glass, can be due to maintaining too high an oil level; lower the level by opening/adjusting the oil return valve. It could also be caused by refrigerant carry-over or liquid injection overfeeding, so correct the operation. Loss of suction superheat can also contribute, so adjust evaporator feeds. Contaminated oil or damaged coalescer elements may be the cause, so replace the oil charge and coalescers. A closed coalescer return valve should be opened. Finally, a blocked coalescing oil return line strainer should be cleaned.
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Nancy StoneSep 6, 2025
Why is the discharge temperature very low in my Johnson Controls Air Compressor?
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  Morgan OdomSep 6, 2025
  A very low discharge temperature in your Johnson Controls Air Compressor, accompanied by low oil temperature and potential oil foaming in the oil separator, can be caused by excessive liquid in the suction line or liquid slugging. Check the evaporator and expansion valve function, and decrease the rate of evaporator temperature "pull down." Alternatively, liquid injection may be overfeeding, so check the settings in the control system and the stability of the liquid injection.

Summary

1. Introduction

1.1 Purpose

Provides data for sales, planning phases, component descriptions, technical functions, refrigerant safety, connecting data, and installation.

1.2 Main users

Intended for sales, service, and contracting purposes; maintenance by competent personnel.

1.3 Compressor name, Sabroe;Frick

Explains how Sabroe and Frick compressor names are made up and correspond.

1.4 Amendments to the manual

Lists changes and revisions made to the manual across different versions.

1.5 Manufacturers information

Provides contact details and copyright information for Johnson Controls Denmark ApS.

1.6 Safety precaution definitions used in this manual

Defines safety terms like Danger, Warning, Caution, and Note.

1.7 Requirements for competent persons

Specifies qualifications and training required for personnel working on the unit.

2. Signs and warnings

2.1 Main users

Information on signs and warnings is intended for all users.

2.2 Identification of Johnson Controls Denmark equipment

Describes how to identify equipment via name plates.

2.3 Compressor name plate

Details the information contained on the compressor name plate.

2.4 Compressor name plate - ATEX

Explains the ATEX compressor name plate details.

2.5 Labelling of explosion-proof equipment

Describes ATEX labelling, material groups, categories, hazardous environments, and temperature classes.

2.6 Vessel name plate

Details the information found on the pressure vessel name plate.

2.7 Unit;pipe system name plate

Describes the information on the unit and pipe system name plates.

2.8 Signs

Illustrates and explains various signs found on the equipment.

3. Safety precautions

3.1 Areas of application

Defines the correct usage and limitations for the screw compressor.

3.2.1 General precautions

Provides general safety guidelines and requirements for operation and maintenance.

3.2.4 Safety during maintenance and service

Outlines safety measures to be followed during maintenance and servicing activities.

3.2.7 Lubricating oils

Details the types of lubricating oils and safety instructions for handling.

3.2.11 First aid for accidents with ammonia

Provides first aid measures for ammonia exposure.

4. Technical description

4.1 Description of the screw compressor

Describes the screw compressor unit's design, construction, and features.

4.3 Description of main components and systems

Lists and briefly describes the major subsystems of the screw compressor unit.

4.4 Control system

Details the UniSAB III control system, its functions, and capabilities.

4.5 Compressor

Describes the compressor's design, including suction strainer and stop valve.

4.12 Compressor oil separation system

Explains the oil separation system, its design, and operating mode.

4.17 Compressor oil cooling systems

Details different systems for controlling compressor oil temperature.

4.33 Economiser, high-stage (optional)

Explains the economiser option for increased system capacity and efficiency.

4.34 General piping diagram

Provides general piping diagrams for the unit.

5. Physical and connection data

5.1 Physical data

Provides dimension sketches and tables for the equipment.

5.2 Allowable flange loads

Specifies allowable axial, torque, and load components for flanges.

5.3 Mounting of suction isolation valve

Details the correct placement and installation of the suction isolation valve.

5.4.1 Connections to compressor unit

Provides dimension sketches and tables for compressor unit connections.

5.4.2 Electrical connections

Illustrates the positions of electrical connections on the unit.

6. Technical data

6.1 Data for compressor units

Provides technical data including dimensions and weights for compressor units.

6.3 Planning the machine room

Offers guidance on planning the machine room for adequate space.

6.5 Operating limits

Shows an example of the permissible working range for a compressor.

6.6 Selecting electric motor

Discusses considerations for selecting the appropriate electric motor.

6.13 Noise data

States noise data including SWL and SPL values.

6.15.2 Test pressure levels for standard compressors and components

Details standard test pressure levels for compressors and components.

7. Installation instructions

7.2 Safety precautions

Emphasizes reading safety precautions before installation.

7.4 Installation and first start-up procedure

Outlines mechanical, electrical, and safety equipment installation requirements.

7.17 Alignment of compressor and motor

Explains the importance and methods for aligning the compressor and motor.

7.23 Damping using vibration dampers

Details how to use vibration dampers for reducing vibrations effectively.

7.30 Pressure testing

Describes the procedure for pressure testing the refrigeration plant and unit.

8. Components

Motor

Describes motor types, supply voltage, and protection class.

Oil separator

Details the oil separator and its internal piping connections.

8.1 UniSAB III

Describes the UniSAB III control system and its sensors.

9. Settings

9.1 Control system

Covers the UniSAB III system and notes on factory settings.

10. Operating instructions

11. Maintenance instructions

11.1 Safety precautions

Emphasizes reading safety precautions before performing any maintenance.

11.2 Maintenance of compressor unit

Outlines daily, periodic, and major overhaul maintenance tasks.

11.3 Stopping routine

Describes procedures for stopping and starting up the compressor.

11.7 General rules for use of lubricating oil in refrigeration compressors

Provides rules for selecting and using lubricating oil in refrigeration compressors.

11.12 Charging compressor with lubricating oil

Details the procedure for charging the compressor with lubricating oil.

12. Faultfinding instructions

12.1 How to carry out faultfinding

Explains the situations and methods for carrying out faultfinding.

12.2 Troubleshooting

Provides tables for troubleshooting common problems in refrigeration plants and compressor units.

13. Service instructions

14. Transport instructions

14.1 Safety precautions

Highlights dangers and safety precautions related to transport.

14.2 Transport data

Provides weight and dimensions for transport.

14.4 Handling of compressor and unit

Details how to handle the compressor and unit safely.

14.5 Loading instructions

Provides instructions and warnings for lifting and loading the unit.

14.12 Storage

Outlines provisions for storing the unit, including protective measures.

15. Commissioning instructions

15.1 Safety precautions

Emphasizes safety precautions before commissioning.

15.2 Preparations for commissioning

Covers final installation checks and personnel requirements.

15.4 Evacuation and charging of refrigerant

Details the process of evacuating and charging refrigerant.

15.5 Start-up

Provides instructions for starting up the plant.

15.7 Commissioning checklist

A checklist for verifying operations before and after start-up.

16. Spare parts list

16.1 Please see separate spare parts manual

Directs users to a separate manual for spare parts information.

17. Spare parts drawings

17.1 Please see separate spare parts manual

Directs users to a separate manual for spare parts drawings.

18. Final disposal

18.1 Safety precautions

Outlines safety precautions to be taken before dismantling the plant.

18.2 Waste disposal

Provides guidelines for the proper disposal of machine parts, oil, refrigerant, and electronics.

19. Appendices

1. List of torque

Includes torque tables for screws and bolts.

3. Diagrams and sketches

Refers to order-specific diagrams and sketches for piping, wiring, and layout.

4. Electric motor

Provides instructions for electric motors.