WABCO SYSTEM SAVER HP MM1736 Maintenance Manual
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WABCO SYSTEM SAVER HP MM1736 Maintenance Manual

WABCO SYSTEM SAVER HP MM1736 Maintenance Manual

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SYSTEM SAVER HP
AIR DRYER
MAINTENANCE MANUAL
MM1736

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Summary of Contents for WABCO SYSTEM SAVER HP MM1736

  • Page 1 SYSTEM SAVER HP AIR DRYER MAINTENANCE MANUAL MM1736...

  • Page 3: Table Of Contents

    10.2019 subject to change without notice or liability. WABCO reserves the right to revise the MM1736 1 (en) information presented or to discontinue the production of parts described at any time.

  • Page 4: General Information

    WARNING Description of a possible situation which may result in irreversible injury or death if the warning is ignored. CAUTION Description of a possible situation which may result in irreversible injury if the warning is ignored. NOTICE Description of a possible situation which may result in material damage if the warning is ignored. Important information, notes and/or tips www www Reference to information on the internet 1. Action step Action step Ö Consequence of an action List „ • List Note on the use of a tool/WABCO tool How to Obtain Additional Maintenance, Service and Product Information If you have any questions about the material covered in this publication, or for more information about the WABCO product line, please contact WABCO Customer Care Center at 855-228-3203, by email at wnacustomercare@wabco-auto.com, or visit our website: www.wabco-na.com.
  • Page 5 General Information WABCO Academy www www https://www.wabco-academy.com/home/ WABCO online product catalog www www http://inform.wabco-auto.com/ Your direct contact to WABCO WABCO North America WABCO USA LLC 1220 Pacific Drive Auburn Hills, MI 48326 Customer Care Center: (855) 228-3203 www.wabco-na.com...

  • Page 6: Safety Information

    Safety Information Safety Information Provisions for a safe work environment Only trained and qualified auto technicians and auto mechanics may carry out work on the vehicle. „ Read this publication carefully. „ Follow all warnings, notices and instructions to avoid personal injury and property damage. „ Always abide by the vehicle manufacturer's specifications and instructions. „ Observe all accident regulations of the respective company as well as regional and national „ regulations. The workplace should be dry, sufficiently lit and ventilated. „ Use personal protective equipment if required (safety shoes, protective goggles, respiratory „ protection and ear protectors). Read and observe all Danger, Warning and Caution hazard alert messages in this publication. They provide information that can help prevent serious personal injury, damage to components, or both. WARNING To prevent serious eye injury, always wear safe eye protection when you perform vehicle maintenance or service. WARNING Park the vehicle on a level surface. Block the wheels to prevent the vehicle from moving. Support the vehicle with safety stands. Do not work under a vehicle supported only by jacks. Jacks can slip or fall over. Serious personal injury and damage to components can result. WARNING Remove all air pressure from the air system before you disconnect any component, including the desiccant cartridge. Pressurized air can cause serious personal injury.

  • Page 7: Introduction

    Introduction Introduction Overview Maintenance Manual MM1736 contains troubleshooting steps and service information for the WABCO System Saver HP single cartridge air dryers. If you have a WABCO System Saver (1200 or 1800) single cartridge air dryer, use MM34, WABCO System Saver Series (1200 and 1800) Single Cartridge Air Dryers. If you have a WABCO System Saver Twin air dryer, use MM35, WABCO System Saver Twin Air Dryer. To download these publications, go to wabco-na.com. Air Dryer Identification The System Saver HP air dryer has the governor integrated into the body of the air dryer and also has an integrated purge tank. Figure 1. Fig. 1 PURGE TANK GOVERNOR 4013285a How the Air Dryer Works During system pressure build-up, compressed air passes into the air dryer where the filter system removes contaminants and passes the air into the drying stage. Moisture-laden air passes through the desiccant bed in the air dryer cartridge and moisture is retained by the desiccant. Moisture that condenses out also collects in the base of the dryer. When the compressor unloads, the water is expelled and dried air flows back through the dryer, drying the desiccant for the next cycle.

  • Page 8: Air Dryer Cycle

    Introduction 3.3.1 Air Dryer Cycle A single cartridge air dryer cycle is illustrated in Table A. Table A: Air Dryer Cycle Cycle Stage Air Flow The governor turns the compressor loading on when supply tank pressure drops below CONTROL cut-in pressure, between 105-115 psi “WET” AIR “DRY” AIR (724-792 kPa) depending on the governor COMPRESSOR settings. INTAKE LINE 4013565c Compressed air passes into the air dryer at the inlet port: Moisture-laden air and contaminants „ enter the desiccant. CARTRIDGE Moisture is retained by desiccant; „ moisture also collects in the base of the dryer. Contaminants are removed as air „...

  • Page 9: System Saver Hp Air Dryer System

    Introduction Cycle Stage Air Flow When the compressor unloads, the purge valve opens. On the System Saver HP: Dry air flows from the integrated purge „ tank back through the air dryer. Air can CARTRIDGE be felt and heard flowing from the purge valve for an extended period of time. Dry system air flows back through the „ air dryer to regenerate desiccant. PURGE TANK PURGE PORT 4013569a 3.3.2 System Saver HP Air Dryer System Fig. 2 COMPRESSOR INTAKE LINE UNLOADER LINE SYSTEM SAVER IP AIR DRYER COMPRESSOR SYSTEM RESERVOIRS CONTROL...

  • Page 10: Air Dryer Components

    Introduction Air Dryer Components WABCO System Saver HP single cartridge air dryers contain replaceable component parts shown in Figure 3. Refer to Section 4 for instructions for removal of old parts and installation of new parts. Fig. 3 DESICCANT OR COALESCING CARTRIDGE OUTLET CHECK VALVE ASSEMBLY PORT 2.1 O-RING PRESSURE RELIEF VALVE PORT 3.1 HEATER ASSEMBLY PORT 6 GOVERNOR PORT 3.3 PURGE VALVE ASSEMBLY PORT 3.2 TURBO CUT-OFF VALVE ASSEMBLY PORT 3.4...

  • Page 11: Dryer Identification Tag

    LOCATION CODE DAY OF THE WEEK 17114 PART NUMBER 4013290a 3.4.2 Description of Components Replacement components for single canister air dryers are described below. Spin-on/spin-off design allows quick and easy maintenance. Always replace cartridges with authentic WABCO brand cartridges. Coalescing Cartridge: Utilizes a filter element added to the standard desiccant to remove aerosols and oil particles. Heater: Located in the air dryer base, the heater prevents water that collects in the air dryer from freezing. It consists of a cylindrical resistive-type heating element and a small circular thermostat. Heater is available for 12- and 24-volt air dryers. Figure 5. Fig. 5 HEATER MAY BE STAINLESS STEEL CLAD OR CERAMIC 1002149a Outlet Check Valve: A valve located in the outlet port (port 21) of the air dryer. It prevents air from flowing...
  • Page 12 Introduction Pressure Relief Valve: A valve that protects the air dryer from over-pressurization. Figure 7. Fig. 7 1002153a Purge Valve Assembly: A valve assembly located on the bottom of the air dryer base that remains open during a compressor unload cycle. It allows collected moisture, condensation and contamination to be expelled from the air dryer during a purge cycle. Figure 8. Fig. 8 4013321a Turbo Cut-off Valve: A valve located in the inlet port of the air dryer. It closes the path between the air compressor and the air dryer purge valve during compressor unload. This prevents a loss of turbocharger boost pressure during a compressor unload cycle, thereby maintaining boost pressure for maximum engine horsepower (used exclusively on 1200 Plus and HP models). Figure 9. Fig. 9 4013365a Heater Power Harness: Twelve-inch cable with Metri-Pack plug provides electrical connection to air dryer heating unit. Figure 10. Fig. 10 1002157a...
  • Page 13 Introduction Governor: Located in port 3.3 of the air dryer base. Controls the cut-in and cut-out pressure of the compressor. Figure 11. Fig. 11 4014745a...

  • Page 14: Component Removal And Installation

    Component Removal and Installation Component Removal and Installation WARNING To prevent serious eye injury, always wear safe eye protection when you perform vehicle maintenance or service. WARNING Park the vehicle on a level surface. Block the wheels to prevent the vehicle from moving. Support the vehicle with safety stands. Do not work under a vehicle supported only by jacks. Jacks can slip and fall over. Serious personal injury and damage to components can result. WARNING Remove all pressure from the air system before you disconnect any component, including the desiccant cartridge. Pressurized air can cause serious personal injury. The pressure protection elements are not serviceable on the System Saver HP. The entire dryer needs to be replaced if these parts are not operating effectively. Component Replacement 4.1.1 Requirements Refer to Table B for component replacement requirements. If necessary, you may also refer to Table E for System Saver Series air dryer troubleshooting. Before replacing any air dryer component, verify that the air compressor and air governor are working correctly, then drain the air tanks. Repair or replace these parts, if necessary. Check the entire air system for leaks, and repair as necessary. When draining air tanks before servicing the air dryer, check for water and/or oil that may have accumulated in the tanks. Water and/or oil in the air tanks could indicate a problem with the dryer or compressor.
  • Page 15 Component Removal and Installation Table B: Replacement Requirements Component When to Replace Cartridge Every two to three years for standard Preventative maintenance. dessicant. Every one to two years for coalescing. When compressor is replaced. Contaminated cartridge. Water in supply tank. Saturated or contaminated cartridge, high duty cycle (wrong application of air dryer). Heater Water collecting in air dryer is freezing — Heater assembly not working Assembly (internal short or open circuit). electrical power to dryer is OK. Outlet Check Air continues to flow from purge valve after Valve is stuck in the open position, or Valve purge cycle, but stops flowing when the not functioning correctly. compressor load cycle begins. No pressure build-up in system, everything Valve is stuck in closed position. else is OK. Purge Valve No purge cycle when compressor unloads Valve is stuck in the closed position, — normal pressure at dryer control port 4...

  • Page 16: Component Removal And Installation Procedures

    Component Removal and Installation Procedures WARNING To prevent serious eye injury, always wear safe eye protection when you perform vehicle maintenance or service. WARNING Park the vehicle on a level surface. Block the wheels to prevent the vehicle from moving. Support the vehicle with safety stands. Do not work under a vehicle supported only by jacks. Jacks can slip and fall over. Serious personal injury and damage to components can result. WARNING Remove all pressure from the air system before you disconnect any component, including the desiccant cartridge. Pressurized air can cause serious personal injury. The pressure protection elements are not serviceable on the System Saver HP. The entire air dryer needs to be replaced if these parts are not operating effectively. When replacing air dryer components, use only WABCO replacement parts. The exploded view of the air dryer in Section 3 shows the location of the various air dryer components. 4.2.1 Desiccant Cartridge IMPORTANT NOTE: Refer to Table C for correct desiccant cartridge part numbers to use with the air dryer. Table C: Replacement Cartridges Air Dryer Part Number Replacement Cartridge Part Number 432 480 001 0 432 901 238 2 432 480 101 0 432 901 238 2...
  • Page 17 Component Removal and Installation 1. Verify the replacement kit contains one cartridge and one O-ring. Figure 12. Fig. 12 1002234a 2. Loosen and remove the old cartridge. Use strap a wrench if necessary. 3. Remove and discard O-ring from dryer base. 4. Inspect and clean seal seat. Figure 13. Repair any minor damage. If the seal seats are damaged so badly that a tight seal cannot be maintained, replace the air dryer. Fig. 13 O-RING SEAL SEAT SEAL 1002164a 5. Lubricate and install the new O-ring on the stem. 6. Lubricate cartridge seal. 7. Thread the replacement cartridge onto the base until the seal touches the base. Then, tighten the cartridge ONE additional turn. DO NOT OVERTIGHTEN. Figure 13. If the cartridge will not fully spin on the dryer, the wrong cartridge is being use. Refer to the IMPORTANT NOTE and table.

  • Page 18: Outlet Check Valve Assembly

    Component Removal and Installation 4.2.2 Outlet Check Valve Assembly 1. Review Figure 14 to ensure you have all of the parts required to replace the outlet check valve. Use the grease included with the replacement kit to lubricate the O-ring seal. Fig. 14 O-RING VALVE GREASE BODY SPRING WASHER SNAP RING 4013363a 2. Remove the snap ring, washer, spring, valve body and O-ring. 3. Clean and inspect the valve bore. If the bore is damaged so that a tight seal cannot be maintained, replace the air dryer. 4. Install the new O-ring on the valve body. Figure 15. Fig. 15 O-RING VALVE BODY SPRING WASHER SNAP RING 1002166a 5. Apply a thin layer of grease from the kit to the valve bore and the O-ring. 6.

  • Page 19: Heater Assembly

    Component Removal and Installation 4.2.3 Heater Assembly 1. Review Figure 16 to ensure you have all of the parts required to replace the heater assembly. Fig. 16 RECEPTACLE THERMOSTAT HEATER ELEMENT O-RING 1002167a 2. Disconnect the plug. 3. Remove the screws, receptacle and O-ring from the base to access the retainer screw. 4. Remove the retainer screw and then remove the entire heater assembly. 5. Install the O-ring to heater connector housing. 6. Install the new element and thermostat in their cavities. 7. Install the new retainer and screw to hold the element and the thermostat in place. 8. Install the receptacle and fasten it in place with the screws. Figure 17. Fig. 17 O-RING RECEPTACLE HEATER THERMOSTAT ELEMENT 1002168a...

  • Page 20: Turbo Cut-Off Valve Assembly

    Turbo Cut-Off Valve Assembly Use the grease included with the replacement kit to lubricate the O-rings and seals. 1. Remove the snap ring. Figure 18. Fig. 18 O-RING PISTON O-RING SLEEVE COVER SNAP RING 4013287a 2. Remove the cover. 3. Remove the piston and sleeve. 4. Clean and inspect the valve bore. If the bore is damaged so that a tight seal cannot be maintained, replace the air dryer. 5. Apply a thin layer of grease to the valve bore and the O-rings. 6. Install new O-rings on the piston and sleeve. 7. Press the piston into the sleeve. 8. Press the piston-sleeve assembly into the air dryer. 9. Install the cover and snap ring. 10. Replace the desiccant cartridge using the detailed instructions provided earlier in this section. 4.2.5 Governor Function — The governor controls the cut-in and cut-out pressure of the compressor through signal lines from the system reservoir as well as the compressor head controlling onload and offload. Use only the WABCO governor specified for use with the System Saver HP air dryer.

  • Page 21: Purge Valve Assembly

    Component Removal and Installation 1. Using a 1-3/16″ wrench, remove the governor from the air dryer. Figure 19. Fig. 19 GOVERNOR 4013360a 2. Install the new governor into the air dryer. Use a 1-3/16″ wrench to tighten it to no more than 8.85 ft-lb (12 Nm). 4.2.6 Purge Valve Assembly 1. Use a 1-11/16″ wrench to remove the purge valve assembly from the air dryer. Figure 20. Fig. 20 PURGE VALVE ASSEMBLY 4013568a 2. Clean and inspect the valve bore. If the bore is damaged so that a tight seal cannot be maintained, replace the air dryer. 3. Install the purge valve assembly in the air dryer. Use a 1-11/16″ wrench to tighten it to no more than 11 ft-lb (15 Nm). 4.2.7 Air Dryer Assembly This procedure is for removing and replacing a unit. For instructions on an initial installation, refer to TP92116, Installing the WABCO System Saver Air Dryer. To obtain this publication, go to wabco-na.com. 1. Drain all pressure from the air system. Disconnect the air lines from port 1, port 2.2 and port 4. Use markers to label the lines for correct installation.
  • Page 22 Component Removal and Installation 2. Disconnect the heater electrical plug from the heater receptacle. 3. Remove the three mounting bolts. Remove the air dryer from its mounting location. Figure 21. Fig. 21 4013563a 4. Attach the new unit to the frame or mounting bracket with new mounting bolts and washers. Tighten the bolts to 22-30 ft-lb (30-40 Nm). Figure 22. Fig. 22 4013564a 5. Connect the heater electrical plug to the heater receptacle. 6. Reconnect all system air lines. 7. Test the installation for correct operation. Refer to the procedure in this section.

  • Page 23: Troubleshooting And Testing

    Troubleshooting and Testing Troubleshooting and Testing WARNING To prevent serious eye injury, always wear safe eye protection when you perform vehicle maintenance or service. WARNING Park the vehicle on a level surface. Block the wheels to prevent the vehicle from moving. Support the vehicle with safety stands. Do not work under a vehicle supported only by jacks. Jacks can slip and fall over. Serious personal injury and damage to components can result. WARNING Remove all pressure from the air system before you disconnect any component, including the desiccant cartridge. Pressurized air can cause serious personal injury. Maintenance To keep the air dryer operating efficiently, WABCO recommends the following routine maintenance. Table D: Maintenance Schedule Action Interval Ensure the dryer purges when compressor Weekly unloads. Check for moisture in the system by opening the Weekly, or as recommended by the drain cock on vehicle system reservoirs slowly. manufacturer, whichever is most frequent. Replace the standard desiccant cartridge. Every two to three years, or more often depending on usage, vocation, and condition of compressor. Whenever compressor is rebuilt. Replace the coalescing cartridge. Every one to two years.

  • Page 24: Maintenance Tips

    Troubleshooting and Testing 5.1.1 Maintenance Tips With correct maintenance, the WABCO air dryer will provide years of reliable service, even under adverse operating conditions. To provide additional protection against the harmful effects of extreme heat or cold, here are a few helpful tips. Extreme Heat Make sure the compressor discharge line is long enough to keep the air dryer inlet air below 175°F (80°C). Figure 23. Refer to Section 7. Fig. 23 1002159a Extreme Cold Make sure the air dryer heater is in good working order by running a heater resistance test. Refer to the procedure in this section. Check the line from the compressor to port 4 of the dryer for oil and/or water. Keep this line clean to help prevent freezing. WABCO air dryer components are installed in the air dryer at the factory and are designed to last for the life of the dryer. Under some operating conditions, however, a replacement may be required. Refer to Section 4 for replacement guide instructions. Troubleshooting Conditions you may experience, and suggested solutions, appear in Table E. Refer to the exploded view of the air dryer in Figure 3 for the location of dryer components.
  • Page 25 Troubleshooting and Testing Table E: System Saver HP Series Air Dryer Troubleshooting Condition Possible Cause Solution Dryer leaks from purge valve Purge valve frozen open Check heater. Repair/replace if necessary. during compressor loaded (cold weather operation). Make sure governor to dryer port 4 line is cycle. The leak may cause free of water/oil. excessive compressor cycling Remove and inspect purge valve and or prevent the system from clean water/oil from top of piston. building air pressure. Debris under purge valve Remove purge valve cartridge and inspect seat, such as particles from for contamination. Remove if possible, or fittings or air inlet line. replace purge valve cartridge. Remove desiccant cartridge and clean sump area. Turbo cut-off valve is Remove turbo cut-off valve. Clean dryer cracked or O-rings are bore and check for damage. Replace turbo leaking.
  • Page 26 Troubleshooting and Testing Condition Possible Cause Solution Air dryer purges too often, Leak in line between Repair air line. perhaps as frequently compressor and dryer port as every 15 seconds, accompanied by excessive Line between the outlet of Line between dryer and wet tank must be cycling of the compressor. the dryer and the wet tank unobstructed. has a check valve installed. Leaks in the air system. Repair leaks. Excessive air system Increase air system capacity or reduce air demands. demand. Outlet check valve not Inspect and replace outlet check valve as seating. needed. Leaking air compressor Inspect compressor. Repair/replace per unloader(s). manufacturer’s instructions. On air dryers equipped with Turbo cut-off valve not Replace turbo cut-off valve. turbo cut-off valves, the air sealing. flows out of purge valve entire Outlet check valve not Replace outlet check valve.

  • Page 27: Tests

    Troubleshooting and Testing Condition Possible Cause Solution No air pressure build-up in Air dryer not plumbed Ensure compressor discharge line is system. correctly (connections plumbed to air dryer port 1, and air dryer reversed). port 21 or 22 is connected to vehicle’s supply tank. Air governor not working Inspect the governor and replace it, if correctly. needed, with a WABCO governor kit. Air system leaks, such as Locate leak(s) and repair. compressor discharge line, air dryer, reservoirs, brake or suspension valves, etc. Air dryer leaks from purge Refer to purge valve conditions listed in valve. this chart. Water, oil, or sludge in air Desiccant contaminated Replace desiccant. Inspect compressor system tanks. with oil. per manufacturer’s instructions. Water in system tanks. Dessicant saturated. Replace the dessicant cartridge with a genuine WABCO cartridge. Maintenance interval not followed.

  • Page 28: Air Pressure Checks

    Troubleshooting and Testing 5.2.1.2 Electric Power to Dryer 1. Set the volt-ohmmeter to volts. 2. Disconnect the vehicle harness at the heater. 3. Add a small electrical lead at the wire harness connector. 4. Place leads on each pin of the wiring harness connector. 5. If there is an abnormal voltage reading, inspect the wiring harness, wires and fuses. 5.2.1.3 Leak Test 1. Drain air from all system tanks. 2. Close reservoir draincocks. 3. Start the vehicle. Allow air system pressure to build while engine idles. 4. When the system reaches cut-out pressure there will be a purge, or strong blast of air, followed by a mild flow which will last 10-45 seconds. 5. Shut off the engine. 6. Apply a soap solution to each connection that contains pressurized air. Check the connections to see if soap solution bubbles. No Soap Bubbles: Connections are sealed correctly. „ Soap Bubbles Appear: Connections are NOT sealed correctly. „ To Repair Incorrectly Sealed Connections 1.
  • Page 29 Troubleshooting and Testing 5.2.2.2 Turbo Cut-Off Valve (Pertains only to dryers equipped with turbo cut-off valves) 1. Wear safe eye protection. Park the vehicle on a level surface. Block the wheels to prevent the vehicle from moving. Set the parking brake. 2. Pump the air system down by making brake applications until the system pressure gauge shows just below cut-in pressure, typically 100 psi (6.89 bar). 3. Start the vehicle. 4. While the compressor is pumping, inspect for air coming out of the bottom of the air dryer. If air is coming out of the bottom of the TCV or the governor exhaust vent, replace the TCV using the „ procedure in this maintenance manual. 5. If the TCV is not leaking, continue to run the engine until the compressor builds the system to cut-out pressure, typically 130 psi (8.96 bar) 6. When cut-out pressure is reached, verify that the air dryer purges. There will be a loud blast of air from the purge valve followed by a gentle flow of air lasting about 30 seconds. After 30 seconds, all flow of air from the purge valve should stop. If air continues coming out of the bottom of the TCV, replace the TCV using the procedure in this „ technical bulletin. If the compressor and air dryer constantly cycle several times before cut-out pressure is reached, „...

  • Page 30: Glossary

    Glossary Glossary Table F: Basic Air Dryer System/Air Dryer Terms Term Definition Air Compressor A device that pumps air to and builds air pressure in an air system. Air Dryer A device that cools, filters and dries the air delivered by an air compressor. Air Governor A device that controls the operation of the air compressor by constantly monitoring air pressure in the supply tank of the air system. The air governor initiates the compressor load cycle when “cut-in” pressure is realized, and initiates the compressor unload cycle when the “cut-out” pressure is reached. The air governor also controls the air dryer by sending an air signal (at the beginning of the compressor unload cycle) to the control port of the air dryer, initiating the purge cycle. When this air signal is removed by the governor (at the beginning of the compressor load cycle), the purge valve closes and the drying cycle begins. Compressor Load Cycle The time during which the air compressor is building air pressure in an air system. Compressor Unload The time during which the air compressor is idling and is not building air Cycle pressure in an air system. Cut-In Pressure The pressure level in the air system supply tank which triggers the compressor load cycle. Cut-Out Pressure The pressure level in the air system supply tank which triggers the compressor unload cycle. Dedicated Purge Tank A separate air tank used exclusively for holding air used in an air drying cycle. This tank eliminates the need for a regeneration valve. Optimum...

  • Page 31: Application Information

    Application Information Application Information Recommendations For complete installation and operating requirements, refer to TP9672, Air Dryer Application Guidelines. To download this publication, go to wabco-na.com. Compressor discharge line should have a continual downhill run to the air dryer. There should be no „ water traps (low points or kinks) in the line before or after the dryer. Mount air dryer so that there is no direct splash or spray from a wheel. „ Keep air dryer at least 12" (305 mm) from any heat-producing sources like exhaust manifolds or pipes, „ transmissions, etc. Make sure there are no valves or other devices in the dryer-to-supply-tank line to prohibit or restrict the „ flow of air back from the supply tank to the air dryer. 7.1.1 Operating Environment Table G: Operating Parameters Operating Parameter Requirement Temperature (ambient operating range) −40°F to 175°F (−40°C to 80°C) Electrical Power (for heater and solenoid/timer power) 12 or 24 volts available Thermostat Range (On/Off temp) 45°F, 86°F (7°C, 30°C) 7.1.2 Discharge Line Diameter from compressor to air dryer „ 5/8-inch (15.875 mm) ID minimum for 25.5 cfm and under 3/4-inch (19.05 mm) ID minimum for over 25.5 cfm...

  • Page 32: System Saver Installation Criteria

    Application Information System Saver Installation Criteria Table H: Installation Criteria Operating Parameters Signal Name Wire Color Pressure requirements Maximum pressure 140 psi (965 kPa) Minimum governor cut-out 115 psi (793 kPa) pressure Governor range 15 to 25 psi (103 to 172 kPa) (cut-out — cut-in) Flow capacity Compressor rating All naturally aspirated compressors up to 38.8 cfm Compressor on-time Normal running Two minutes maximum Occasional (three times per Seven minutes day maximum) Compressor unloaded Minimum for purge cycle 20 seconds time Maximum duty cycle Compressor on-time total running time Discharge line...
  • Page 33 Notes...
  • Page 34 Notes...
  • Page 35 Notes...
  • Page 36 About WABCO WABCO (NYSE: WBC) is the leading global supplier of braking control systems and other advanced technologies that improve the safety, efficiency and connectivity of commercial vehicles. Originating from the Westinghouse Air Brake Company founded 150 years ago, WABCO is powerfully “Mobilizing Vehicle Intelligence” to support the increasingly autonomous, connected and electric future of the commercial vehicle industry. WABCO continues to pioneer innovations to address key technology milestones in autonomous mobility and apply its extensive expertise to integrate the complex control and fail-safe systems required to efficiently and safely govern vehicle dynamics at every stage of a vehicle’s journey – on the highway, in the city and at the depot. Today, leading truck, bus and trailer brands worldwide rely on WABCO’s differentiating technologies. Powered by its vision for accident-free driving and greener transportation solutions, WABCO is also at the forefront of advanced fleet management systems and digital services that contribute to commercial fleet efficiency. In 2018, WABCO reported sales of over $3.8 billion and has more than 16,000 employees in 40 countries. For more information, visit www.wabco-na.com. © 2019 WABCO North America – MM1736 / 10.2019...

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