Sullivan-Palatek 75UDG

Questions and Answers

J
Janet GilmoreAug 3, 2025
What to do if my Sullivan-Palatek Air Compressor won't start?
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  Daniel JonesAug 3, 2025
  If your Sullivan-Palatek Air Compressor won't start, here are some possible causes and solutions: * The main disconnect might be open. In this case, close the switch. * Line fuse(s) might be blown. Replace the fuse(s). * The control circuit breaker could be tripped. Reset the circuit breaker. * The motor starter overload might be tripped. Reset it. If the problem continues, check the sizing and adjustment of the overload and ensure the motor starter contacts are functioning correctly. * There might be low incoming line voltage. Check the voltage, and if it's low, consult your power company. * There might be a unit lock-up. It could be filled with oil due to a leaking inlet valve (replace the inlet valve) or due to unit failure (replace the unit).
A
Amanda HarrisAug 7, 2025
Why does my Sullivan-Palatek Air Compressor shut down with air demand present?
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  greenjessicaAug 7, 2025
  If your Sullivan-Palatek Air Compressor shuts down while there's still air demand, it could be due to several reasons: * Loss of control voltage: Reset the system. If the problem persists, ensure the line pressure does not exceed the operating pressure specified on the machine's nameplate. * Low incoming voltage: Consult your power company. * Excessive operating pressure: The separator may require maintenance. Check for fault signal H5. * Monitor temperature at the microprocessor: Check for proper ventilation. * Cooling air flow restricted: Clean the cooler and check for proper ventilation. * Ambient temperature too high: Provide sufficient ventilation. * Low lubricoolant level: Add lubricoolant.
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jacobslarryAug 11, 2025
What to do if Sullivan-Palatek 75UDG Air Compressor line pressure rises above cutout pressure?
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  michael91Aug 11, 2025
  If the line pressure of your Sullivan-Palatek Air Compressor rises above the cutout pressure, consider these potential causes and solutions: * A leak in the control system might be causing a loss of pressure signal. Replace the tubing or repair the leak. * The regulator might be improperly adjusted or defective. Readjust it or replace it if necessary. * The blowdown valve could be defective. Check that sump pressure is exhausted to the atmosphere when the pressure switch opens. Replace it if necessary. * The inlet valve might be faulty. Repair or replace it.
E
Edward MartinAug 15, 2025
Why Sullivan-Palatek 75UDG will not build up full discharge pressure?
- A
  Ann HunterAug 15, 2025
  If your Sullivan-Palatek Air Compressor isn't building up to full discharge pressure, here are a few possible reasons: * Air demand is too great: Repair any air leaks in the system or add compressor capacity to meet the demand. * The air filter is dirty: Change or clean the filter element if needed. * The control pressure regulator is out of adjustment: Adjust the regulator. * The control regulator is defective: Check the diaphragm and replace it if necessary. * The blowdown valve is open: Repair or replace it. * The micro processor control setting is off: See 6.5 for adjustment procedure.
A
Alexander HansenAug 20, 2025
Why is my Sullivan-Palatek 75UDG using excessive lubricoolant?
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  Jason GriffinAug 20, 2025
  If your Sullivan-Palatek Air Compressor is consuming too much lubricoolant, consider the following: * A clogged oil return line: Clean the strainer and/or orifice. * A damaged or malfunctioning separator element: Change the separator. * A leak in the lubrication system: Check all pipes, connections, and components. * A defective inlet valve: Repair the inlet valve. * Operating pressure below 60 psig: Repair the minimum pressure valve.
K
Kyle GibbsAug 25, 2025
What to do if Sullivan-Palatek 75UDG Air Compressor relief valve opens repeatedly?
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  Lori Anderson DDSAug 25, 2025
  If the relief valve on your Sullivan-Palatek Air Compressor opens repeatedly: * The pressure relief valve may be faulty. Replace it. * The control settings may be incorrect. Readjust as per 6.5.
A
Alyssa ValenzuelaAug 28, 2025
What causes line pressure venting through blowdown on a Sullivan-Palatek Air Compressor?
- S
  Stephanie HillAug 28, 2025
  If you're experiencing line pressure venting through the blowdown on your Sullivan-Palatek Air Compressor, it could be due to a defective check valve portion of the Minimum Pressure/Check Valve. Repair or replace the check valve.

Summary

SECTION 1 - SAFETY

1.1 GENERAL

General safety precautions and warnings for operating compressors.

1.2 PRESSURE RELEASE

Procedures for safely releasing pressure before maintenance or opening components.

1.3 FIRES;EXPLOSIONS

Safety measures to prevent fires and explosions, including oil handling.

1.4 MOVING PARTS

Warnings and precautions related to moving parts and guards.

1.5 PHYSICAL DANGERS

Precautions against physical hazards like hot surfaces, sharp edges, and air discharge.

1.6 TOXICITY

Warnings about using compressor air for breathing and potential contaminants.

1.7 ELECTRIC SHOCK

Safety procedures to prevent electric shock during operation and maintenance.

1.8 LIFTING

Guidelines for safely lifting and moving the compressor unit.

1.9 AUTOMATIC START AND;OR RESTART

Hazards and precautions regarding automatic compressor start-up.

1.10 NOISE

Information on noise levels and the need for hearing protection.

1.11 HAZARD WARNING SIGNS

Importance and location of warning decals on the compressor.

SECTION 2 - SPECIFICATIONS

2.1 DATA AND DIMENSIONS

Technical specifications, including model data and physical dimensions.

2.2 LUBRICATION GUIDE

Recommendations for lubricoolant types and warranty implications.

2.3 APPLICATION GUIDE

Guidelines for operating environments and parallel compressor configurations.

SECTION 3 - DESCRIPTION

3.1 INTRODUCTION

Overview of SULLIVAN-PALATEK Plant Air Compressors.

3.2 COMPRESSOR UNIT

Description of the rotary screw compressor unit and lubrication system.

3.3 MOTOR

Details about the electric motor used in the compressors.

3.4 INTAKE;CONTROL SYSTEM

Function and operation of the air intake and control system.

3.5 COMPRESSOR LUBRICATION;COOLING SYSTEM

Components and function of the lubrication and cooling system.

3.6 COMPRESSOR DISCHARGE SYSTEM

Description of the discharge system and oil separation functions.

3.7 STARTER AND ELECTRICAL PARTS

Details on the motor starter and electrical components.

3.8 INSTRUMENTATION

Information on the microprocessor control and its displays.

SECTION 4 - INSTALLATION

4.1 RECEIVING

Instructions for inspecting the compressor upon delivery.

4.1 a WELDING

Warning against welding on the compressor package.

4.2 LOCATION

Guidelines for selecting an appropriate installation location.

4.3 SUPPORT

Recommendations for mounting and supporting the compressor.

4.4 ELECTRICAL

Electrical installation requirements and checks.

4.5 a WIRING DIAGRAM, FULL VOLTAGE STARTER (STANDARD)

Wiring diagram for standard full voltage starter.

4.5 b WIRING DIAGRAM Y - DELTA START (OPTIONAL)

Wiring diagram for optional Y-Delta starter.

4.6 DIRECTION OF ROTATION

Procedure for checking and correcting motor rotation direction.

4.7 COMPRESSED AIR PIPING

Guidelines for installing compressed air piping systems.

4.8 ADDITIONAL HELP

Tips for optimizing air inlet conditions and multiple machine installations.

SECTION 5 - OPERATION

5.1 INTRODUCTION

Introduction to the operation section and manual.

5.2 INITIAL START

Step-by-step guide for the initial start-up procedure.

5.3 MICRO PROCESSOR PROGRAMMING; GENERAL INSTRUCTIONS

Instructions for navigating and using the microprocessor control menus.

5.4 NORMAL OPERATION

Procedure for normal daily operation of the compressor.

5.5 SHUTDOWN

Steps for safely shutting down the compressor.

5.6 RESTARTS

Procedures for restarting the compressor after power loss or shutdown.

SECTION 6 - MAINTENANCE

6.1 MAINTENANCE SCHEDULE

Schedule of recommended maintenance tasks and intervals.

6.2 OIL FILTER

Procedure for replacing the oil filter element.

6.3 AIR FILTER

Procedure for inspecting and replacing the air filter.

6.4 AIR;OIL SEPARATOR

Procedure for replacing the air/oil separator element.

6.5 PRESSURE ADJUSTMENT

Instructions for adjusting control and unload pressures.

6.6 SERVICE;MAINTENANCE PROCEDURES

Procedures for accessing and changing service parameters.

6.7 TROUBLESHOOTING

Troubleshooting guide for common machine problems and their causes.

SECTION 7 - PARTS LIST

7.1 PARTS ORDERING

Instructions on how and where to order replacement parts.

7.2 RECOMMENDED SPARE PARTS

List of recommended spare parts for the compressor.

7.3 MOTOR, COMPRESSOR AND MOUNTING PARTS

Illustrated parts list for motor, compressor, and mounting components.

7.4 LUBRICATION AND COOLING SYSTEM - AIR COOLED

Illustrated parts list for the air-cooled lubrication and cooling system.

7.5 INTAKE AND CAPACITY CONTROL SYSTEM - 75 G & 100 G

Illustrated parts list for the intake and capacity control system.

7.7 DISCHARGE SYSTEM 75 & 100 G

Illustrated parts list for the discharge system.

7.8 MICROPROCESSOR CONTROL & ELECTRICAL PARTS - OPEN

Illustrated parts list for open-frame microprocessor control and electrical parts.

7.9 MICROPROCESSOR CONTROL - ENCLOSED

Illustrated parts list for enclosed microprocessor control.

7.10 ENCLOSURE - AIR COOLED UD

Illustrated parts list for the air-cooled enclosure.

7.11 ENCLOSURE - WATER COOLED UD

Illustrated parts list for the water-cooled enclosure.

7.13 a DECAL AND IDENTIFICATION

List of decals and their identification numbers for models.

7.13 b DECAL AND IDENTIFICATION

T1 microprocessor instructions, keypad functions, and troubleshooting.

SECTION 8 - WARRANTY

2011 Standard Warranty

Details of the standard warranty for industrial compressors.

2011 Platinum and Platinum-Plus Warranty

Information on extended Platinum and Platinum-Plus warranty programs.

SECTION 9 - GENERAL ARRANGEMENT DRAWINGS

9.1 P&I DIAGRAM - AIR COOLED

Piping and Instrumentation diagram for air-cooled models.

9.2 GENERAL ARRANGEMENT - 75-100 HP UDAC, OPEN

General arrangement drawing for open UDAC models.

9.3 GENERAL ARRANGEMENT - 75-100 HP UDAC, ENCLOSED

General arrangement drawing for enclosed UDAC models.

9.4 GENERAL ARRANGEMENT - 75-100 HP WC, OPEN

General arrangement drawing for open water-cooled models.

9.5 GENERAL ARRANGEMENT - 75-100 HP WC, ENCLOSED

General arrangement drawing for enclosed water-cooled models.

SULLIVAN - PALATEK COMPRESSOR MAINTENANCE LOG