1. Manuals
  2. Brands
  3. Nuvair Manuals
  4. Air Compressor
  5. Coltri MCH 36 Electric
  6. Operation manual

Nuvair MCH36 Operation Manual

6250 psi vertical silent
Hide thumbs Also See for MCH36:
Table of Contents

Advertisement

Quick Links

Download this manual
Operation Manual
Nuvair MCH36 6250 psi Vertical Silent
SKU 8058.6

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the MCH36 and is the answer not in the manual?

Questions and answers

Related Manuals for Nuvair MCH36

Summary of Contents for Nuvair MCH36

  • Page 1 Operation Manual Nuvair MCH36 6250 psi Vertical Silent SKU 8058.6...
  • Page 2 Nuvair MCH36 6250 psi Vertical Silent Notes: Nuvair Page 2 www.Nuvair.com...
  • Page 3 Nuvair will make every effort to update manuals as parts and functional aspects change. However, the look or location of components on your product may differ from those in this manual if improvements have been made that do not affect functionality or operational procedures.

  • Page 4: Table Of Contents

    Nuvair MCH36 6250 psi Vertical Silent Table of Contents Introduction ..............................7 Symbol Conventions ............................... 7 System Description ..............................7 Required Operator Training ............................ 7 Important Information for the User........................7 Foreword ................................. 8 Assistance ................................8 Responsibility ................................9 Purpose of the Machine ............................9 Where the Compressor May be Used ........................
  • Page 5 Nuvair MCH36 6250 psi Vertical Silent 10.7 Checking the Oil Level ............................29 10.8 Changing the Lubricating Oil and Filter ......................... 29 10.9 Tightening Torque Values ............................. 30 10.10 Changing the Air Intake Filter ..........................30 10.11 Transmission Belts ..............................31 10.12 Checking Transmission Belts ..........................
  • Page 6 Nuvair MCH36 6250 psi Vertical Silent Table of Figures Figure 1. Compressor control panel and front side..................14 Figure 2. Compressor reverse side........................15 Figure 3. Cabinet interior and compressor block....................16 Figure 4. Front cabinet access to transmission belts..................17 Figure 5.

  • Page 7: Introduction

    The Nuvair MCH36 Vertical Silent Compressor is a continuous-duty, commercial grade, high-pressure compressor that utilizes the Nuvair MCH36 pumping unit to supply up to 18 CFM FAD (510 L/min or 30 m³/hr) at 6250 psi (431 bar) working pressure. The compressor block and its power unit—a 20 hp (14.7 kW) TEFC electric motor—are mounted in a fully enclosed and silenced cabinet.

  • Page 8: Foreword

    Never postpone repairs and have them carried out by specialized personnel only; use only original spare parts. Assistance Nuvair technicians are at your disposal for all routine/unscheduled maintenance work. Please forward your request for assistance to Nuvair by sending a fax or e-mail to: Phone: +1.805.815.4044...

  • Page 9: Responsibility

    Nuvair MCH36 6250 psi Vertical Silent Responsibility Nuvair considers itself exonerated from any responsibility or obligation regarding injury or damage caused by: • Failure to observe the instructions contained in this manual that concern the running, use and maintenance of the compressor.
  • Page 10 It is forbidden to use the compressor under conditions or for purposes other than those • indicated in this manual and Nuvair cannot be held liable for breakdowns, problems or accidents caused by failure to observe this rule. Check that the fittings provide a proper seal by wetting them with soapy water: Stop the •...

  • Page 11: Where The Compressor May Be Used

    Nuvair MCH36 6250 psi Vertical Silent Where the Compressor May be Used The compressor must only be used in environments having the characteristics described in the following table: Area of Machine Use: Essential Data Table Temperature Ambient Minimum: +14°F (+10°C); Maximum: +104°F (+40°C)

  • Page 12: Safety Warnings

    Nuvair MCH36 6250 psi Vertical Silent Safety Warnings Nuvair has taken extreme care in providing you with the information you will need to operate this system. However, it is up to you to carefully read this manual and make the appropriate decisions about system safety.

  • Page 13: High-Risk Areas Of Compressor

    21. Check hoses for weak or worn conditions before each use and make certain that all connections are secure. The user of any compressor or nitrox system manufactured by Nuvair is hereby warned that failure to follow the preceding Safety and Operation Precautions can result in injuries or equipment damage. However, Nuvair does not state as fact or does not mean to imply that the preceding list of Safety and Operation Precautions is all-inclusive, and further that the observance of this list will prevent all injuries or equipment damage.

  • Page 14: Compressor Layout

    Nuvair MCH36 6250 psi Vertical Silent Compressor Layout Hour Meter Cabinet Temperature Gauge Start Button Emergency Stop Button Wrong Rotation Light Auto Drain Fill Pressure Gauge Test Purge (Optional Dial-a-Pressure Switch Shown) Stop Button Oil Pressure Gauge Interstage Pressure Gauges (4)

  • Page 15: Figure 2. Compressor Reverse Side

    Nuvair MCH36 6250 psi Vertical Silent Air Intake and Filter Condensate Trap Condensate Drains (3) Condensate Trap Discharge Valve Figure 2. Compressor reverse side. Nuvair Page 15 www.Nuvair.com...

  • Page 16: Figure 3. Cabinet Interior And Compressor Block

    Nuvair MCH36 6250 psi Vertical Silent Oil Filter Oil Fill Plug Figure 3. Cabinet interior and compressor block. Nuvair Page 16 www.Nuvair.com...

  • Page 17: Figure 4. Front Cabinet Access To Transmission Belts

    Nuvair MCH36 6250 psi Vertical Silent Transmission Belts (2) Electric Motor Figure 4. Front cabinet access to transmission belts. Nuvair Page 17 www.Nuvair.com...

  • Page 18: General Safety Rules

    Nuvair MCH36 6250 psi Vertical Silent General Safety Rules The compressor must only be used by qualified personnel. They must fully understand the arrangement and function of all the controls, instruments, indicators, warning lights and the various information labels. Protective Clothing...

  • Page 19: System Components

    Low oil shutdown switch • High temperature switch • Cabinet temperature thermostat and display screen • (2) Nuvair CAN-35 filtration towers rated to 7000 psi (482 bar) • o 60,000 cu ft Lubricant: • Nuvair 455 Food Grade Lubricant (standard for breathing gas compressors)

  • Page 20: Compressor Specifications

    Unpack the system and remove it from the pallet. Visually inspect the system to make sure there has been no damage during shipping. If damaged, please call Nuvair to file a damage report. Please take photos and supply detailed information about the damage.

  • Page 21: Air Intake Extension Kit

    Checks for the Start of Each Working Day Inspect the exterior of the compressor (couplings, pipes, pneumatic components, etc.) and check for any oil leaks. Replace parts where necessary or contact Nuvair. Lubricating Oil Level Check Check that the level of lubricating oil is within acceptable limits (i.e., between...

  • Page 22: Storing Technical Documentation

    Nuvair MCH36 6250 psi Vertical Silent 3364 psi (232 bar) • 3625 psi (250 bar) • 3988 psi (275 bar) • • 4350 psi (300 bar) • 4786 psi (330 bar) • 6454 psi (445 bar) The safety valve must be tested every 250 working hours of the compressor.

  • Page 23: Control Panel

    This gauge indicates the pressure inside of the lubricating oil circuit. Oil pressure is also monitored by the Dashboard. If no oil pressure or a high pressure reading occurs, switch off compressor and contact Nuvair. Oil Pressure 58 psi (4 bar) Cold 21.75 psi (1.5 bar)

  • Page 24: Pressure Controls

    Nuvair MCH36 6250 psi Vertical Silent Pressure Controls The compressor is equipped with a choice of one of two types of automatic start/stop systems (Figure 12). • Pressure Switch: Shuts down the compressor at a set high pressure. • Dial-A-Pressure Switch: Allows the operator to dial-in a high pressure for the compressor to automatically stop at when the pressure is reached during the filling process.

  • Page 25: Figure 13. Tank Refill Illustration (Din Valve Pictured)

    Nuvair MCH36 6250 psi Vertical Silent Once refilling has been completed wait • for automatic shutdown of the compressor with the pressure switch. Close valves (d) and (e) by rotating • them clockwise. Open the bleed valve (f) by rotating it •...

  • Page 26: Maintenance

    Nuvair MCH36 6250 psi Vertical Silent 10.0 Maintenance 10.1 Foreword To obtain the best possible performance from the compressor and ensure a long working life for all its parts it is essential that personnel follow the use and maintenance instructions with extreme diligence. It is thus advisable to read the information below and consult the manual every time an inconvenience arises.

  • Page 27: Unscheduled Work

    Adjust Nuts & Bolts   Checking and cleaning  Change * Nuvair recommends oil changes every 250 hours of runtime, or once per year, whichever is less. ** Change oil every 100 hours when compressor is used with nitrox. Years...

  • Page 28: Checking And Changing The Lubricating Oil & Filter

    100 hours of use or annually, whichever comes first. HP Compressor Lubricant: Only use lubricants rated for use with nitrox, such as Nuvair 455™ or Nuvair 751™. Never mix compressor lubricants. Nuvair compressors are shipped with Nuvair 455 synthetic food grade lubricant (for breathing air use) or Nuvair 751 (for industrial use).

  • Page 29: Checking The Oil Level

    Remove the oil drain hose brass end cap. At Nuvair, we prefer to have oil changed every 250 hours (or once per year, whichever interval is less) unless you are taking advantage of an oil analysis program that confirms the oil is still good.

  • Page 30: Tightening Torque Values

    Nuvair MCH36 6250 psi Vertical Silent Unscrew the filter being sure to recover the oil inside it. • • Replace the filter with a new one. Wet the gasket of the filter with a little oil and firmly tighten the filter manually.

  • Page 31: Transmission Belts

    Nuvair MCH36 6250 psi Vertical Silent • Open clips (c) and remove the air filter cover (a). • Remove the air filter cartridge (b). • Replace the cartridge with a new one. • Replace the O-ring (see “d” ) with a new one.

  • Page 32: Changing Air Filtration Cartridges

    The filter cartridge must be replaced before the air develops an unpleasant smell, when the litmus test paper mounted inside the cartridge element turns white or a color other than blue. The MCH36 Vertical Silent compressor comes standard with one (1) molecular sieve drying filter (SKU NUV65677-M-B) and one (1) tri-chem breathing air filter (SKU NUV65247-MHC-B).

  • Page 33: Filter Element Life Factors

    Nuvair MCH36 6250 psi Vertical Silent Close the drain valve/s. • DANGER Do not carry out these tasks if the compressor has just shut down and is hot; wait for the compressor to cool. All maintenance work must be carried out with the compressor OFF and the power supply lead unplugged from the wall socket.

  • Page 34: Condensate Discharge

    Nuvair MCH36 6250 psi Vertical Silent 10.16 Condensate Discharge An outflow of condensate water with lubricating oil is normal during refills: the quantity will depend on the level of humidity in the air. Condensate must be disposed of according to the instructions shown in section 11.4, Waste Disposal.

  • Page 35: Safety Valves

    Tampering with the safety valve can seriously damage the compressor, cause serious injury to personnel and renders the warranty null and void. Should safety valves fail to work properly, contact Nuvair for technical assistance. Figure 25. Safety valve locations. Nuvair Page 35 www.Nuvair.com...

  • Page 36: Storage

    Nuvair MCH36 6250 psi Vertical Silent 11.0 Storage Should the compressor not be used, it must be stored in a dry sheltered area at an ambient temperature of between +32°F and +104°F (0°C and +40°C). Store the compressor away from sources of heat, flames or explosive.

  • Page 37: Dismantling The Compressor

    Nuvair MCH36 6250 psi Vertical Silent NOTICE Disassembly and demolition must only be carried out by qualified personnel. At every stage of demolition observe the safety regulations contained in this manual carefully. 11.5 Dismantling the Compressor Dismantle the compressor in accordance with all the precautions imposed by the laws in force in the country of use.

  • Page 38: Instructions For Emergency Situations

    Contact the fire department. 13.0 Maintenance Register 13.1 Customer Service Customers continue to receive assistance after the purchase of a compressor. To this end Nuvair has created a worldwide customer service network. 13.2 Scheduled Maintenance The scheduled maintenance program is designed to keep your compressor in perfect working order. Some simple tasks, described in this manual, can be carried out directly by the customer;...

  • Page 39: Spare Parts List

    Nuvair MCH36 6250 psi Vertical Silent 14.0 Spare Parts List Compressor System Components Type Part Number Compressor Lubricant, Food Grade (nitrox compatible) Nuvair 455 (1 gal) 9406 Compressor Lubricant, Industrial Grade Nuvair 751 (1 gal) 9403 Drying Filter Cartridge NUV65677-M-B...

  • Page 40: Service Log

    Nuvair MCH36 6250 psi Vertical Silent 15.0 Service Log Date Technician Name Service Performed Nuvair Page 40 www.Nuvair.com...

  • Page 41: Appendix

    Nuvair MCH36 6250 psi Vertical Silent 16.0 Appendix 16.1 Supply and Breathing Air Specifications All supply and breathing air must meet the following requirements of CGA G-7.1-1997. Periodic air quality testing to assure compliance is recommended. All breathing air for diving produced by a downstream compressor must be purified to meet Grade E quality, and periodic air quality testing to assure compliance is mandatory.

  • Page 42: Nuvair Compressor System Warranty

    Nuvair has employed in the installation or use of any OEM component. This warranty is not transferable. Nuvair will, at its discretion and according to the terms as set forth within, replace or repair any materials which fail under normal use and service and do not exhibit any signs of improper maintenance, misuse, accident, alteration, weather damage, tampering, or use for any other than the intended purpose.

  • Page 43: Change Date

    Nuvair to contact the user regarding this product. The user must notify Nuvair of any change of address by the user or sale of the product. All changes or revisions to this manual must be recorded in this document to ensure that the manual is up to date.
  • Page 44 Nuvair MCH36 6250 psi Vertical Silent Nuvair Phone +1.805.815.4044 +1.805.486.0900 Address 1600 Beacon Place Oxnard, CA 93033 USA Email info@nuvair.com www.Nuvair.com Website Rev. 01.2025 SKU 8058.6 Nuvair Page 44 www.Nuvair.com...

Table of Contents