Vmac PREDATAIR60 Manuale utente

VMAC – Vehicle Mounted Air Compressors

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Installation Manual

PREDATAIR60

Hydraulic Compressor

1.0 General Information ...................................................................3

1.1 Specifications and Components ...............................................3

2.0 Installation Requirements..........................................................6

2.1 Ventilation Requirements..........................................................6

2.2 Hydraulic Requirements..........................................................11

2.3 Electrical Requirements ..........................................................12

2.4 Air Receiver Requirements .....................................................13

3.0 Installing the PREDATAIR60 ...................................................15

3.1 Mounting the Compressor.......................................................15

3.2 Connecting the Wiring.............................................................15

3.3 Speed Control .........................................................................20

4.0 Completing the Installation .....................................................23

4.1 Before Operation Checklist .....................................................23

4.2 After Engaging the Hydraulics Checklist.................................23

4.3 Setup, Performance Testing and Adjustments .......................24

5.0 Testing Ventilation ...................................................................26

5.1 Calculating Duty Cycle............................................................26

5.2 Testing the Installation ............................................................28

5.3 Analyzing the Test Results .....................................................31

6.0 Hydraulic System Data.............................................................34

6.1 Hydraulic Oil Type...................................................................34

6.2 Hydraulic Line Sizing ..............................................................35

6.3 Hydraulic System Filtration .....................................................40

6.4 Hydraulic Oil Reservoir ...........................................................40

6.5 Avoiding Cavitation .................................................................44

Ordering Parts.................................................................................44

VMAC – Vehicle Mounted Air Compressors

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Document #1930125

Installation Manual for VMAC System H600001

PREDATAIR60 Hydraulic Compressor

Changes and Revisions

Version Revision Details Revised by/date Approved Implemented

00 Original manual IB June 16 2006 SM 25 Aug 2006 28 Aug 2006

Important Information

The information in this manual is intended for certified VMAC

installers who have been trained in installation procedures and for

people with mechanical trade certification who have the tools and

equipment to properly and safely perform the installation. Do not

attempt this installation if you do not have the appropriate

mechanical training, knowledge and experience.

Follow all safety precautions for mechanical work. If you have

difficulty with the installation, contact VMAC.

The VMAC warranty form is located at the back of this manual. This

warranty form must be completed and mailed or faxed to VMAC at

the time of installation for any subsequent warranty claim to be

considered valid.

To order parts, contact your VMAC dealer. Your dealer will ask for

the VMAC serial number, part number, description and quantity. To

locate your nearest dealer, call 1-800-738-8622.

All trademarks used in this manual are the property of the respective copyright holder.

The contents of this manual may not be reproduced in any form without the express

written permission of VMAC, 1333 Kipp Road, Nanaimo, BC V9X 1R3.

Printed in Canada

VMAC – Vehicle Mounted Air Compressors

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1.0 General Information

Read this manual before beginning the installation so that you can

understand the hydraulic, electric (Figure 2) and ventilation

requirements. This will ensure a successful installation and effective

operation of the PREDATAIR60 (Figure 1).

1.1 Specifications and Components

This is a flooded-lobe, rotary screw compressor (filled with VMAC

certified and approved synthetic oil) driven by a hydraulic motor.

Compression occurs when inlet air (at normal atmospheric pressure)

enters a chamber where it is trapped between the rotating rotor

lobes. A lubricated pitch line provides sealing. As the lobes mesh,

they reduce the volume of the air, compressing it to the desired

pressure.

The system has a two-stage air/oil separator. The first separation

stage consists of baffles, which perform mechanical separation. The

second stage uses a special separation element, which delivers dry

air to the outlet.

Pressure regulation is achieved with a mechanical inlet control valve

and an adjustable pressure regulator.

The compressor is protected by a paper-type replaceable air filter

and a spin-on type oil filter. Oil is removed from the delivered service

air by a coalescing separator element.

Safety features include:

•2,650 psi hydraulic pressure relief valve

•200 PSI relief valve in oil/air tank

•blow-down valve to discharge system pressure on shutdown

•temperature safety sensor in compressor

Do not disable or bypass the over-temperature

shutdown circuit. Failure of the shutdown system could

result in equipment damage, injury or death.

A liquid-to-air cooler maintains operating temperatures in an optimal

performance range which increases system durability and reduces

the temperature of the compressed air.

The system pressure is pre-set at 150 psi. Do not increase this

pressure setting as it will also increase the hydraulic operating

pressure. To reduce the pressure, use a Filter Regulator Lubricator

(FRL).

VMAC – Vehicle Mounted Air Compressors

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Compressor air filter

(must have proper ventilation)

Oil cooler (inside cover,

must have proper ventilation

)

Air discharge port

with check valve

Hydraulic fluid inlet

Hydraulic fluid return

Blowdown cap with

internal coalescing filter

Minimum clearance

for servicing - 6 inches

Compressor oil fill

(shipped full from

the factory)

Oil level sight glass

(make sure this can be easily

accessed for daily inspection)

Compressor oil drain

Oil filter

Cooling fan

Regulator on

inlet valve

(inside cover)

Minimum clearance

for servicing - 6 inches

Figure 1 – System components

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Figure 2 – System wiring

VMAC – Vehicle Mounted Air Compressors

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2.0 Installation Requirements

The information in this section is very important for

proper operation of the compressor. Read these

requirements before beginning installation.

Before installing the compressor, examine the possible locations and

consider the following factors when selecting a location:

•it is convenient for making electrical, hydraulic and air

connections and does not require extensive plumbing

•hose and wire lengths will be the shortest possible and a

minimum number of 90 degree fittings will be used

•the oil level at the sight glass can be checked easily

•there will be sufficient clearance around the unit for good air

circulation and effective cooling

•it can be serviced easily without having to disconnect lines or

remove and reposition the unit

•it will be protected from excessive exposure to the elements

and possible incidental damage from other operations

•it is away from heat sources such as engines, exhaust

systems or other components that generate heat

•it is not in a location where it will be exposed to high

contamination levels, including combustible gases

2.1 Ventilation Requirements

During operation, the PREDATAIR60 can develop

considerable heat, as much as a house furnace.

Proper ventilation is vital for proper operation and to

avoid damage to components.

If you are installing the compressor into a new

configuration, refer to section 5.0 Testing Ventilation for

information.

2.1.1 Top Mounting

This is the preferred mounting location. Placing the unit on top of

the service body (Figure 3) provides the best access to ambient

air and provides the best cooling. Maintain a minimum of 6”

between the sides of the compressor housing and all other solid

objects

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2.1.2 Enclosed Mounting

Mounting the PREDATAIR60 in an enclosure (Figure 3) will limit

the access to ambient air, restrict the escape of hot air from

around the unit and have an adverse effect on cooling. Make sure

that adequate ventilation is provided so the cooling system will

function properly.

Top mount

Enclosed mount

Figure 3 – Mounting locations

It is not possible to make absolute recommendations regarding

ventilation because of the widely differing circumstances that are

possible. Duty cycle, ambient temperature and enclosure shape

are some of the important variables.

Significant ventilation and additional cooling will be

required if the PREDATAIR60 is mounted in the

same enclosure as the hydraulic oil reservoir. The

heat generated during operation will continue to

heat the hydraulic oil, even with fresh, ambient air

entering the cooler

Ideal ventilation will provide good airflow through the unit with no

restrictions (Figure 4). Cool ambient air ducted to the cooler and

exhaust fan are recommended.

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Figure 4 – Ideal ventilation with ambient air vent of a suitable

size for the application

Avoid installing deep into enclosures that will not permit adequate air

circulation (Figure 5).

Enclosure

Figure 5 – Avoid deep installation

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The effects of hot air recirculation drastically reduce cooling but

those effects can be reduced by using air dams (Figure 6).

Top view

Hot air recirculating

Top view

Dams installed to block recirculation

Figure 6 – Reducing hot air recirculation

Recommended minimum clearances if no back ventilation is possible

are very important (Figure 7) but are not adequate for 100%

operational capacity (see section 5.0 Testing Ventilation).

Enclosure sizes (Figure 8) should meet minimum requirements for

optimum operation (see section 5.0 Testing Ventilation).

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6”

6” 6”

Figure 7 – Minimum clearances

Indice

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