Nuvair MCH36 Silent Touch User manual

Operation Manual
MCH36 Silent Touch

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Notes:

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If you have any questions on this equipment, please contact Technical Support at:
Nuvair
1600 Beacon Place
Oxnard, CA 93033 USA
Phone: [phone]
Fax: [phone]
Email: [email protected]m
Hours: Monday through Friday
8:00 AM to 5:00 PM Pacific Time
This Operation Manual contains important safety information and should always be available to those
personnel operating this equipment. Read, understand, and retain all instructions before operating
this equipment to prevent injury or equipment damage.
Every effort was made to ensure the accuracy of the information contained within. Nuvair, however, retains the
right to modify its contents without notice.
Under Nuvair’s system of continuous improvement, certain components may be updated or changed as higher
quality or more efficient parts and assemblies become available.
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.
Units pictured may also be equipped with different options than those on your product. In this case, the basic
operational and maintenance guidelines will still apply.
If you have problems or questions after reading the manual, stop and call Nuvair at +1.805.815.4044 for
information.

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Table of Contents
1.0 Introduction ................................................................................................................................................................8
1.1 Required Operator Training....................................................................................................................................8
1.2 Important Information for the User........................................................................................................................8
1.3 Foreword.................................................................................................................................................................9
1.4 Assistance................................................................................................................................................................ 9
1.5 Responsibility..........................................................................................................................................................9
1.6 Purpose of the Machine........................................................................................................................................10
1.7 Where the Compressor May be Used...................................................................................................................11
1.8 Running and Testing the Compressor...................................................................................................................12
2.0 Safety Warnings ........................................................................................................................................................12
2.1 Safety and Operation Precautions........................................................................................................................13
2.2 High-Risk Areas of Compressor.............................................................................................................................14
3.0 Compressor Layout ...................................................................................................................................................15
4.0 Start Guide & Dashboard Use ...................................................................................................................................16
4.1 Quick Start Guide..................................................................................................................................................16
4.2 Overview Screen ...................................................................................................................................................16
4.3 Alarm History Screen ............................................................................................................................................17
4.4 Service Hours Screen.............................................................................................................................................17
4.5 Gauges Screen.......................................................................................................................................................18
4.6 Alarm Configuration Screen..................................................................................................................................18
4.7 Alarm Events and Descriptions .............................................................................................................................18
4.8 Nuvair Page...........................................................................................................................................................21
5.0 General Safety Rules.................................................................................................................................................21
5.1 Protective Clothing................................................................................................................................................22
5.2 Emergency Equipment..........................................................................................................................................22
5.3 Checks and Maintenance......................................................................................................................................22
6.0 Safety Information Labels: Location & Description ..................................................................................................22
7.0 System Components .................................................................................................................................................23
8.0 Compressor Specifications........................................................................................................................................24
8.1 Unpacking and Installation ...................................................................................................................................24
8.2 Air Intake Extension Connection...........................................................................................................................24
8.3 Electrical Connection ............................................................................................................................................25
9.0 Checks for the Start of Each Working Day ................................................................................................................25
9.1 Lubricating Oil Level Check ...................................................................................................................................25
9.2 Check Refill Hoses .................................................................................................................................................25
9.3 Check the Safety Valves ........................................................................................................................................25
9.4 Storing Technical Documentation.........................................................................................................................26

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10.0 Control Panel.............................................................................................................................................................26
10.1 Gauge Matrix.........................................................................................................................................................27
10.2 Cabinet Temperature............................................................................................................................................27
10.3 Emergency Stop ....................................................................................................................................................27
10.4 PRESEC System......................................................................................................................................................28
11.0 Pressure Controls......................................................................................................................................................28
12.0 Tank Refill Procedure................................................................................................................................................28
13.0 Maintenance.............................................................................................................................................................30
13.1 Foreword...............................................................................................................................................................30
13.2 General..................................................................................................................................................................30
13.3 Unscheduled Work................................................................................................................................................31
13.4 Scheduled Maintenance Table..............................................................................................................................31
13.5 Troubleshooting....................................................................................................................................................32
13.6 Checking and Changing the Lubricating Oil & Filter..............................................................................................32
13.7 Checking the Oil Level...........................................................................................................................................33
13.8 Changing the Lubricating Oil and Filter.................................................................................................................34
13.9 Tightening Torque Values .....................................................................................................................................35
13.10 Changing the Air Intake Filter ...............................................................................................................................35
13.11 Transmission Belts ................................................................................................................................................36
13.12 Checking Transmission Belts.................................................................................................................................36
13.13 Changing Transmission Belts.................................................................................................................................36
13.14 Changing Air Filtration Cartridges.........................................................................................................................37
13.15 Temperature Effect on Filter Life..........................................................................................................................39
13.16 Condensate Discharge ..........................................................................................................................................39
13.17 Changing Flex Hoses..............................................................................................................................................40
13.18 Safety Valves.........................................................................................................................................................40
14.0 Power Requirements ................................................................................................................................................41
14.1 Amperage System Load.........................................................................................................................................41
14.2 Rotation Check......................................................................................................................................................41
15.0 Storage......................................................................................................................................................................42
15.1 Stopping the Machine for a Brief Period ..............................................................................................................42
15.2 Stopping the Machine for an Extended Period.....................................................................................................42
15.3 Dismantling and Putting the Compressor Out of Service .....................................................................................42
15.4 Waste Disposal......................................................................................................................................................42
15.5 Dismantling the compressor.................................................................................................................................43
16.0 Instructions for Emergency Situations......................................................................................................................43
16.1 Fire ........................................................................................................................................................................43
17.0 Maintenance Register...............................................................................................................................................43

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17.1 Customer Service ..................................................................................................................................................43
17.2 Scheduled Maintenance .......................................................................................................................................43
17.3 Using the compressor under heavy duty conditions ............................................................................................43
17.4 Nuvair Customer Care Contact .............................................................................................................................44
18.0 Spare Parts List..........................................................................................................................................................44
19.0 Service Log ................................................................................................................................................................45
20.0 Appendix ...................................................................................................................................................................46
20.1 Supply and Breathing Air Specifications ...............................................................................................................46
20.2 Filter Element Life Factors ....................................................................................................................................46
21.0 Nuvair Compressor System Warranty.......................................................................................................................47
22.0 PLC Wiring Schematics..............................................................................................................................................49
Separate Manuals Included:
Compressor Parts Manual

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Table of Figures
Figure 1. High risk areas of compressor unit. .......................................................................................................................14
Figure 2. The Nuvair MCH36 Silent Touch Compressor........................................................................................................15
Figure 3. Dashboard overview screen...................................................................................................................................16
Figure 4. Pressure Setpoint input screen..............................................................................................................................16
Figure 5. Security Code input screen. ...................................................................................................................................16
Figure 6. Alarm History screen..............................................................................................................................................17
Figure 7. Service Hours screen showing reset buttons.........................................................................................................17
Figure 8. Service Hours screen..............................................................................................................................................17
Figure 9. Gauges screen........................................................................................................................................................18
Figure 10. Alarm Configuration screen. ................................................................................................................................18
Figure 11. Protective clothing examples...............................................................................................................................22
Figure 12. “Do Not Use” sign. ...............................................................................................................................................22
Figure 13. Safety information label locations.......................................................................................................................22
Figure 14. Illustration of proper positioning.........................................................................................................................24
Figure 15. Air extension connection diagram.......................................................................................................................25
Figure 16. Safety valve example. ..........................................................................................................................................26
Figure 17. Oil, interstage, and final pressure gauges............................................................................................................27
Figure 18. PRESEC Filter Control. ..........................................................................................................................................28
Figure 19. Tank refill illustration (DIN valve pictured)..........................................................................................................30
Figure 20. Opening drain valve depressurizes system..........................................................................................................30
Figure 21. Oil level viewer.....................................................................................................................................................33
Figure 22. Checking and changing lubricating oil..................................................................................................................34
Figure 23. Oil drain hose. ......................................................................................................................................................34
Figure 24. Rotating the air intake filter.................................................................................................................................35
Figure 25. Air filter. ...............................................................................................................................................................35
Figure 26. Transmission belt tension. ...................................................................................................................................36
Figure 27. Changing the transmission belt. ..........................................................................................................................36
Figure 28. Filter canisters......................................................................................................................................................37
Figure 29. Air filter changing diagram...................................................................................................................................38
Figure 30. Condensate tank. .................................................................................................................................................39
Figure 31. Tank refill hose change. .......................................................................................................................................40
Figure 32. Safety valve locations...........................................................................................................................................41
Figure 33. Rotation direction label. ......................................................................................................................................41

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1.0 Introduction
This manual will assist you in the proper set-up, operation, and maintenance of the Nuvair MCH36 compressor
packages. Be sure to read the entire manual. Throughout this manual we will use certain words to call your
attention to conditions, practices or techniques that may directly affect your safety. Pay particular attention to
information introduced by the following signal words:
Indicates an imminently hazardous situation which, if not avoided, will result in serious injury or death.
Indicates a potentially hazardous situation which, if not avoided, could result in serious personal injury
or death.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate
injury. It may also be used to alert against unsafe practices.
Notifies people of installation, operation or maintenance information which is important but not
hazard-related.
1.1 Required Operator Training
This manual must be read carefully and in its entirety.
•All compressor operators / maintenance personnel must read this entire manual with due care and
attention and observe the instructions/information contained herein.
•Company owners ensure that the operator has the required training for operation of the compressor
and that he/she has read the manual.
1.2 Important Information for the User
The information/instructions for compressor use contained in this manual concern the Nuvair MCH36 Series.
•The instruction manual must be read and used as follows:
•Read this manual carefully; treat it as an essential part of the compressor.
•The instruction manual must be kept where it can readily be consulted by compressor operators and
maintenance staff.
•Keep the manual for the working life of the compressor.
•Make sure updates are incorporated in the manual.
•Make sure the manual is given to other users or subsequent owners in the event of resale.

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•Keep the manual in good condition and ensure its contents remain undamaged.
•Do not remove, tear or re-write any part of the manual for any reason.
•Keep the manual protected from damp and heat.
•If the manual is lost or partially damaged and its contents cannot be read it is advisable to request a
copy from the manufacturer.
1.3 Foreword
The regulations/instructions for use contained in this manual constitute an essential component of the supplied
compressor.
These regulations/instructions are intended for an operator who has already been trained to use this type of
compressor. The contained information is necessary and essential to efficient and proper use of the
compressor.
Hurried or careless preparation leads to improvisation, which is the cause of accidents.
Before beginning work, read the following suggestions carefully:
1) Before using the compressor, gain familiarity with the tasks to be completed and the admissible working
position.
2) The operator must always have the instruction manual to hand.
3) Plan all work with due care and attention.
4) You must have a detailed understanding of where and how the compressor is to be used.
5) Before starting work make sure that safety devices are working properly and that their use is
understood; in the event of any doubts do not use the compressor.
6) Observe the warnings given in this manual with due care and attention.
7) Constant and careful preventive maintenance will always ensure a high level of safety when using the
compressor. Never postpone repairs and have them carried out by specialized personnel only; use only
original spare parts.
1.4 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: [phone]
Fax: [phone]
Email: [e-mail]
1.5 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.
•Violent actions or incorrect maneuvers during use or maintenance of the compressor.
•Modifications made to the compressor without prior written authorization from Nuvair.
•Incidents beyond the scope of routine, proper use of the compressor

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Maintenance and repairs must only be carried out using original spare parts and qualified technicians.
Nuvair cannot be held liable for any damages caused by failure to observe this rule. The compressor is
guaranteed as per the contractual agreements made at the time of sale. Failure to observe the
regulations and instructions for use contained in this manual shall render the warranty null and void.
1.6 Purpose of the Machine
This high-pressure compressor has been designed and built for the purpose of producing breathing air by
drawing it from the surrounding environment. The surrounding environment air must be free from any harmful
fumes or contaminates. The air is pulled through an intake air filter, compressed, and passed through
breathing air filtration before it is stored in tanks constructed to contain air at high pressure. The compressor
can also be used for the pumping of gases:
•Nitrogen
•Helium
•Nitrox mixtures up to 40%
Any other use is inappropriate. The manufacturer cannot be held liable for any personal injury or damage to
objects or the machine itself caused by improper use.
•Use only tested, certified storage tanks: do not exceed the working pressure indicated on them.
•Use the compressor in areas free from dust, risk of explosion, corrosion, and fire.
•Improper use could have serious consequences for the user.
•Do not disconnect the hose from the fittings or the clamp when under pressure.
•Change the air purification filters regularly as described in section 13.0.
•Drain the condensate regularly as illustrated in section 13.2: Condensate Discharge.
•The power must be disconnected and locked out before carrying out any cleaning or maintenance
tasks.
•Never pull a plug out by tugging the cord. Make sure the cord is not bent at a sharp angle and that it
does not rub against any sharp edges. Use of extensions is not advised.
•Never operate the compressor when the power cord is damaged, or the power supply
covers/guards are removed.
•All routine and unscheduled maintenance tasks must be carried out with the compressor at a
standstill, the electrical power supply disconnected or locked out and all lines are depressurized.
•After switching off the compressor wait about 30 minutes before carrying out any maintenance
tasks to prevent burns.
•The high-pressure flex hose that connects to external components must be in good condition,
especially in the areas near the fittings.
oThe plastic sheath that covers the pipe must not show any signs of abrasion otherwise damp
could get in, corrode the steel braid and weaken it.
oThe hose must be changed periodically (yearly) or when it shows signs of wear.
oFailure to observe this rule could seriously endanger the users’ safety.

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oMake sure the minimum bending radius of the hose is no less than 250 mm (9.8 inches).
To ensure maximum working efficiency, Nuvair has constructed the compressor with carefully selected
components and materials. The compressor is tested prior to delivery. Continued compressor efficiency over
time will also depend on proper use and maintenance as per the instructions contained in this manual.
All the components, connections and controls used in its construction have been designed and built to a high
degree of safety to resist abnormal strain or in any case a strain greater than that indicated in the manual.
Materials are of the finest quality; their introduction and storage in the company and their utilization in the
workshop are controlled constantly to prevent any damage, deterioration, or malfunction.
Before carrying out any work on the compressor each operator must have a perfect understanding of
how the compressor works, know how to use the controls, and have read the technical information
contained in this manual.
•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
compressor and eliminate any leaks immediately when detected.
•Do not attempt to repair high pressure tubes by welding them or while the compressor is
running.
•Do not empty storage tanks completely—not even for long term storage—as this practice allows
damp air to get in and eventually corrode the tank.
•It is forbidden to tamper with, alter or modify, even partially, the systems and equipment
described in this instruction manual, especially as safety guards and safety symbols are
concerned.
•It is also forbidden to carry out work in any way other than that described or to neglect the
illustrated safety tasks.
•The safety information and the general information given in this manual are very important.
1.7 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 (+14°C); Maximum: +104°F (+40°C)
Air Humidity
Maximum: 80%
rain
Tolerated Weather Conditions
hail
None
snow
Maximum Tilt Angle (bank)
15%
Check that the area in which the compressor is to be positioned is adequately ventilated: good air exchange
(more than one window) with no dust and no risk of explosion, corrosion, or fire.

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If ambient temperatures exceed 113°F (45°C), air conditioning will be required.
Make sure that lighting in the area is sufficient to identify every detail (such as the writing on the info
plates/stickers); use artificial lighting where daylight alone is insufficient.
When pumping nitrox, ambient temperature maximum is +100°F (+38°C) and maximum fill pressure is 3600
psi (250 bar).
1.8 Running and Testing the Compressor
Each compressor is carefully tested prior to delivery. A new compressor must nevertheless be used with
caution during the first five (5) working hours to complete proper break-in of its components. If the compressor
is subject to an excessive workload during initial use, its potential efficiency will be prematurely compromised,
and functionality soon reduced.
During its initial use, open the high-pressure outlet and allow the compressor to run up to the pressure
maintaining valve (PMV) setting of about 2000 psi (138 bar).
After the first 25 hours carry out in addition to the scheduled maintenance the following tasks:
•Change the compressor oil.
•Change the oil filter.
•Check and adjust nuts and bolts.
When changing the oil filter, inspect the filter element and check for any deposits. If metal or carbon
deposits are present, locate the source before restarting the compressor.
2.0 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.
This equipment is used to provide breathing air or nitrox for the purpose of life support. Read this
manual in its entirety. Failure to heed the warnings and cautions contained in this document may
result in severe injury or death.
The equipment you will be using to compress air or nitrox will expose you to both low and high-
pressure gas. Gas, even under moderate pressures, can cause extreme bodily harm. Never allow any
gas stream to be directed at any part of your body.

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Any pressurized hose can cause extreme harm if it comes loose or separates from its restraint (or
termination) while under pressure and strikes any part of your body. Use appropriate care in making
and handling all gas connections.
Do not use any form of mineral oil or synthetic lubricant not rated for the compressor in this system.
Use only the recommended compressor lubricant. Never mix the compressor lubricant with other
lubricants. The use of improper lubricants can lead to fire or explosions, which may cause serious
personal injury or death.
2.1 Safety and Operation Precautions
Because a compressor is a piece of machinery with moving and rotating parts, the same precautions should be
observed as with any piece of machinery of this type where carelessness in operations or maintenance is
hazardous to personnel. In addition to the many obvious safety precautions, those listed below must also be
observed:
1. Read all instructions completely before operating any compressor or nitrox system.
2. For installation, follow all local electrical and safety codes, as well as the National Electrical Code
(NEC) and the Occupational Safety and Health Administration (OSHA) standards.
3. Electric motors must be securely and adequately grounded. This can be accomplished by wiring with a
grounded, metal-clad raceway system to the compressor starter; by using a separate ground wire
connected to the bare metal of the motor frame; or other suitable means.
4. Protect all power cables from contacting sharp objects. Do not kink power cables and never allow the
cables to contact oil, grease, hot surfaces, or chemicals.
5. Make certain that power source conforms to the requirements of your equipment.
6. Pull main electrical disconnect switch and disconnect any separate control lines, if used, before
attempting to work or perform maintenance. “Tag Out” or “Lock Out” all power sources.
7. Do not attempt to remove any parts without first relieving the entire system of pressure.
8. Do not attempt to service any part while System is in an operational mode.
9. Do not operate the System at pressures more than its rating.
10. Do not operate compressor at speeds more than its rating.
11. Periodically check all safety devices for proper operation. Do not change pressure setting or restrict
operation in any way.
12. Be sure no tools, rags or loose parts are left on the Compressor System.
13. Do not use flammable solvents for cleaning the Air Inlet Filters or elements and other parts.
14. Exercise cleanliness during maintenance and when making repairs. Keep dirt away from parts by
covering parts and exposed openings with clean cloth or Kraft paper.
15. Do not operate the compressor without guards, shields, and screens in place.
16. Do not install a shut-off valve in the compressor discharge line, unless a pressure relief valve, of proper
design and size, is installed in the line between the compressor unit and shut-off valve.
17. Do not operate in areas where there is a possibility of inhaling carbon monoxide, carbon dioxide,
nitrogen, or flammable or toxic fumes.

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18. Be careful when touching the exterior of a recently run electric, gasoline, or diesel motor - it may be hot
enough to be painful or cause injury. With modern motors this condition is normal if operated at rated
load - modern motors are built to operate at higher temperatures.
19. Inspect unit daily to observe and correct any unsafe operating conditions found.
20. Compressed air can be a serious hazard. Always use caution. Never direct air stream at any part of the
body as this can cause injuries.
21. Compressed air from this machine must not be used for food processing or breathing air without
adequate downstream filters, purifiers and controls and periodic air quality testing.
22. Always use an air pressure-regulating device at the point of use, and do not use air pressure greater
than marked maximum pressure.
23. 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.
2.2 High-Risk Areas of Compressor
Some areas of the compressor pose a level of operator/bystander risk that were not possible to eliminate at the
design stage or for which safeguards could not be provided without compromising the functionality of the
compressor. Users must be aware of these hazards and potential injury associated with each area.
To prevent accidents and injuries, all operators must be
aware of the potential high-risk areas (Figure 2) of the
compressor unit:
1. Air contamination. Danger of contaminating
produced air due by exposing the air intake to
exhaust fumes or lubricating oil vapors.
2. Electrical dangers. Use the machine with suitable
environmental protections, especially against
water and humidity.
3. Heat-related dangers. Use the machine with
suitable safety devices and after switching off the
machine, wait 30 minutes for the machine to cool
down before carrying out maintenance work.
4. Noise. Danger deriving from noise emitted by the
compressor.
5. Fire risk.
6. Entanglement. Risk of being crushed, dragged or entangled by transmission belts.
7. Impact. Danger of impact/abrasion with the cooling fan.
8. Impact. Danger operator injury or death if high-pressure hoses fail.
Figure 1. High risk areas of compressor unit.

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Figure 2. The Nuvair MCH36 Silent Touch Compressor.
3.0 Compressor Layout
Oil Pressure
Gauge (1)
Interstage Pressure
Gauges (4)
Fill Pressure
Gauge (1)
HP Air Outlets (4)
Emergency Stop
Cabinet
Temperature
Touchscreen
HMI Display

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4.0 Start Guide & Dashboard Use
The Nuvair MCH36 Silent Touch is equipped
with an HMI (Human Machine Interface)
touchscreen system controller called the
Dashboard. The Dashboard allows users to
monitor compressor activity, identify alarm
events. Please refer to the Quick Start Guide
(4.1) for an overview of Dashboard operations.
4.1 Quick Start Guide
1. Turn compressor power on.
2. Select the blue box under “PRESSURE
SETPOINT” (Figure 3) and the Pressure
Setpoint screen appears (Figure 4).
3. Input desired shutdown pressure and press
“ENT” (green box). The Pressure Setpoint
(the pressure at which the compressor will
shut down in psi) is displayed in the blue
box.
4. Decide if the compressor should shut off
after the pressure setpoint is reached one
time or if it should restart automatically
when internal pressure drops below 600
psi of the pressure setpoint.
5. If “SINGLE FILL MODE” is displayed in the
in the upper-left corner (Figure 3), the
compressor will not restart. If “AUTO
RESTART MODE” is displayed, the
compressor will automatically restart when
the internal pressure drops.
6. Press the green “START” button to start
the compressor.
7. Press the red “STOP” button to stop the
compressor at any time.
8. At any time while the compressor is
running, auto drains can be tested for
proper operation by pushing the yellow
“TEST PURGE” button.
9. If an active alarm is present, it will display
in the “Alarm Summary” box (Figure 2).
Once the alarm is rectified, press “RESET”
to clear the alarm. The compressor can be
used as normal after resetting the alarm.
4.2 Overview Screen
The overview screen (Figure 3) provides the general status and operation of the compressor. Using this
screen, the compressor functions include:
•Start (green “START” button)
Figure 3. Dashboard overview screen.
Figure 4. Pressure Setpoint input screen.
Figure 5. Security Code input screen.

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•Stop (red “STOP” button)
•Fill Mode (SINGLE FILL MODE or
AUTO RESTART MODE, described in
Section 4.1).
•Run Hours (displayed as total hours)
•Final Pressure (or “output pressure”in
both digit and gauge display)
•Test Purge (testing of auto drains,
described in Section 4.1).
•Reset (resets all settings to factory
defaults)
•Alarm Summary (indicating alarm type
and time activated)
Other screens can be selected by pressing
one of the five buttons in the bottom ribbon
(Alarm History, Service Hours, Gauges, and
Alarm Configuration). Each screen is defined
below.
To access advanced settings of the
Dashboard and to prevent unauthorized
changes to critical settings, a security code is
sometimes required. To access secured
settings, enter the *-digit security code in the
security code input screen (Figure 5).
4.3 Alarm History Screen
This page is a record of alarm or service
events (Figure 6). The alarm event type will be
noted, when the alarm activated, and when
the user clears or “deactivates” the alarm.
Service events will record the date it was
reset.
4.4 Service Hours Screen
This screen shows non-resetting total RUN
HOURS (in both hours and minutes), along
with 16 service timers (Figure 8).
The service timers can be reset at any time by
pushing the “HIDDEN” button below “PUSH
TO SHOW SERVICE RESETS.”This activates
“RESET” buttons for each timer (Figure 7).
Press the desired service timer reset for one second; the specific timer will reset.
Return to the normal screen by pressing the yellow “PUSH TO HIDE RESETS” button.
Figure 6. Alarm History screen.
Figure 8. Service Hours screen.
Figure 7. Service Hours screen showing reset buttons.

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4.5 Gauges Screen
The gauges screen shows interstage
pressures (first, second, third, and fourth
stages) and final (output) pressure, both
numerically and in a gauge format to illustrate
desired pressure ranges (Figure 9).
The green pressure range is the normal
operating pressure; yellow is below the normal
pressure range, and red is above normal.
Auto drain timers (delay, open time, and
countdown timer to auto drain cycle) are also
displayed on this page.
4.6 Alarm Configuration
Screen
The alarm configuration screen allows users to
enable, disable, and configure individual
system alarms (Figure 10). Some component
alarms have sub-alarms that can also be
individually programmed, enabled, and
disabled.
As an example, the 3rd STAGE PRESSURES
alarm has four sub-alarms including LO,
LOLO, HI and HIHI. These alarms and others
are further described in Section 4.7.
On the following pages are expanded
descriptions of Dashboard functions and alarm
states.
4.7 Alarm Events and Descriptions
The MCH36 Silent Touch dashboard has 55 different alarm states. Each alarm condition has a unique name
and associated definition. Alarm names and definitions are factory set.
When an alarm event threshold is reached, the button color turns yellow and the system will either (a) sound
an alarm, and/or (b) shut down the compressor. The alarm event is logged and will display in the Alarm History
screen (Figure 6) and under the Alarm Summary section of the Overview screen (Figure 3).
Alarm events and definitions include:
123 VLV INSPC RESET
First, second, and third stage valve inspection alarm has been reset.
1234 VLV REPLACE RESET
First, second, third, and fourth stage replace valves alarm has been reset.
1ST STAGE PSI HI
The first stage temperature is high and requires evaluation. Alarm sounds.
Figure 10. Alarm Configuration screen.
Figure 9. Gauges screen.

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1ST STAGE PSI HIHI
The first stage pressure is critically high. The system shuts down immediately and sounds an alarm.
1ST STAGE PSI LO
The first stage pressure is low and requires evaluation. Alarm sounds.
1ST STAGE PSI LOLO
The first stage pressure is critically low. The system shuts down immediately and sounds an alarm.
2ND STAGE PSI HI
The second stage temperature is high and requires evaluation. Alarm sounds.
2ND STAGE PSI HIHI
The second stage pressure is critically high. The system shuts down immediately and sounds an alarm.
2ND STAGE PSI LO
The second stage pressure is low and requires evaluation. Alarm sounds.
2ND STAGE PSI LOLO
The second stage pressure is critically low. The system shuts down immediately and sounds an alarm.
3RD STAGE PSI HI
The third stage temperature is high and requires evaluation. Alarm sounds.
3RD STAGE PSI HIHI
The third stage pressure is critically high. The system shuts down immediately and sounds an alarm.
3RD STAGE PSI LO
The third stage pressure is low and requires evaluation. Alarm sounds.
3RD STAGE PSI LOLO
The third stage pressure is critically low. The system shuts down immediately and sounds an alarm.
AUTO DRAIN FAIL ALM
Check auto drain function. Auto drain failed to drop significant pressure.
CABINET TEMP ALM
The cabinet temperature has exceeded safe levels. The compressor will shut down immediately and
sounds an alarm.
CONDENSATE LEVEL ALM
Condensate level high. Alarm sounds.
DRIVE BELT INSPC RESET
Inspect drive belt alarm has been reset.
DRIVE BELT REPLACE RESET
Replace drive belt alarm has been reset.
ESTOP ALM
Check emergency stop push button. The system shuts down with the E-Stop button is pushed and alarm
sounds.
FAIL TO RUN ALM
Compressor should be running but is not. Alarm sounds.

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FAIL TO START ALM
Compressor should start but did not. Alarm sounds.
FILTER BAD ALM
After 250 hours of runtime, breathing filters change is required. Alarm sounds.
FILTER CARTRIGE ALM
Breathing air filter needs replacing in 3-10 hours of additional runtime. Alarm sounds.
INSPC COND SEPERATOR RS
Inspect condensate separator alarm has been reset.
INSPC HI PSI CANISTER RS
Inspect high-pressure canister alarm has been reset.
INSPECT COND SEPARATOR
Inspection of condensate separator required. Alarm sounds.
INSPECT DRIVE BELT
Inpection of drive belt required and replace as needed alarm. Check associated fittings required. Alarm
sounds.
INSPECT HP FILTER CAN
Inspection of high-pressure filter canister required. Alarm sounds.
INSPECT INTAKE FILTER
Inspection of intake filter required. Replace as needed. Alarm sounds.
INTAKE FILTER CHANGE
Replacement of intake filter required. Alarm sounds.
INTAKE FILTER INSP RESET
Inspection of intake filter alarm has been reset.
INTAKE FILTER REPLACE RS
Replacement of intake alarm has been reset.
LO OIL LEVEL ALM
The compressor oil level is low. The system shuts down immediately and sounds an alarm.
MOTOR OVER LOAD ALM
Motor overload sensor activated. The system shuts down immediately and sounds an alarm.
OIL CHANGE REQUIRED
After 250 hours of runtime, compressor oil change is required. Alarm sounds.
OIL CHANGE REQUIRED RS
Oil change required alarm has been reset.
OIL CHANGE WARN RESET
Oil change warning alarm has been reset.
OIL CHANGE WARNING
Oil change required in 3-10 hours of runtime. Alarm sounds.