Gast 72R User Manual

71R & 72R SERIES

ROCKING PISTON OIL-LESS PUMPS

OPERATION & MAINTENANCE MANUAL

Product Use Criteria:

• Pump only clean, dry air.

• Operate at 32ºF - 104ºF (0ºC - 40ºC).

• Protect unit from dirt & moisture.

• Do not pump flammable or explosive gases or use in an atmosphere that contains such gases.

• Protect all surrounding items from exhaust air. This exhaust air can become very hot.

• Corrosive gases and particulate material will damage unit. Water vapor, oil-based contaminants or other liquids must be filtered out.

• Consult your Gast Distributor/Representative before using at high altitudes.

• This pump is oil-less and requires NO lubrication.

Thank you for purchasing this Gast product. It is manufactured to the highest standards

using quality materials. Please follow all recommended maintenance, operational

and safety instructions and you will receive years of trouble free service.

www.gastmfg.com

ISO 9001 & 14001 CERTIFIED

PART NO. 70 - 6800 G495PL (REV-G)

Single Cylinder Model Shown

Twin Cylinder Model Shown

WARNING

PLEASE READ THIS MANUAL COMPLETELY BEFORE INSTALLING AND USING

THIS PRODUCT. SAVE THIS MANUAL FOR FUTURE REFERENCE AND

KEEP IN THE VICINITY OF THE PRODUCT.

Motor Control It is your responsibility to contact a qualified electrician and assure that the electrical installation is adequate and in conformance with all national and local codes and ordinances. The metal capacitor must be grounded.

Determine the correct overload setting required to protect the motor (see motor starter manufacturer’s recommendations). Select fuses, motor protective switches or thermal protective switches to provide protection. Fuses act as short circuit protection for the motor, not as protection against overload. Incoming line fuses must be able to withstand the motor’s starting current. Motor starters with thermal magnetic overload or circuit breakers protect motor from overload or reduced voltage conditions.

The wiring diagram supplied with the product provides required electrical information. Check that power source is correct to properly operate the dual-voltage motors.

Your safety and the safety of others

is extremely important.

We have provided many important safety messages in this manual and on your product. Always read and obey all safety messages.

This is the safety alert symbol. This symbol alerts you to hazards that can kill or hurt you and others. The safety alert symbol and the words “DANGER” and “WARNING” will precede all safety messages. These words mean:

You will

be killed or seriously injured if you don’t

follow instructions.

You can be killed or seriously injured if you don’t follow instructions.

All safety messages will identify the hazard, tell you how to reduce the chance of injury, and tell you what can happen if the safety instructions are not followed.

Correct installation is your responsibility. Make sure

you have the proper installation conditions and that installation clearances do not block air flow.

Blocking air flow over the product in any way can cause the product to overheat.

Mounting

This product can be installed in any orientation. Mounting the product to a stable, rigid operating surface and using shock mounts will reduce noise and vibration.

INSTALLATION

Accessories

The product’s external intake and exhaust muffler will provide adequate filtration in most applications. Check filters periodically and replace when necessary. Consult your Gast Distributor/Representative for additional filter recommendations.

WARNING

DANGER

Plumbing

Remove plugs from the IN and OUT ports. Connect with pipe and fittings that are the same size or larger than the product’s threaded ports. Be sure to connect the intake and exhaust plumbing to the correct inlet and outlet ports. Ports will not support plumbing.

Install relief valves and gauges at inlet or outlet or both, to monitor performance. Check valves may be required to prevent back streaming through the pump.

Electrical Connection

WARNING

Electrical Shock Hazard

Disconnect electrical power at the circuit breaker or fuse box before installing this product.

Install this product where it will not come into contact with water or other liquids.

Install this product where it will be weather protected.

Electrically ground this product. Failure to follow these instructions can result in

death, fire or electrical shock.

WARNING

Electrical Shock Hazard

This product must be properly grounded. Do not modify the plug provided. If it will not

fit the outlet, have the proper outlet installed by a qualified electrician.

If repair or replacement of the cord or plug is necessary,do not connect the grounding wire to either flat blade terminal. The wire with insulation that is green or green with yellow stripes is the grounding wire.

Check the condition of the power supply wiring. Do not permanently connect this product to wiring that is not in good condition or is inadequate for the requirements of this product.

Failure to follow these instructions can result in death, fire or electrical shock.

OPERATION

Model with a power supply cord:

This product must be grounded. For either 120-volt or 220/240-volt circuits connect power supply cord grounding plug to a matching grounded outlet. Do not use an adapter. (See above diagram.)

Check with a qualified electrician or serviceman if the grounding instructions are not completely understood, or if you are not sure whether the product is properly grounded. Do not modify the plug provided. If it will not fit the outlet, have the proper outlet installed by a qualified electrician.

In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the electric current. This product may be equipped with a power supply cord having a grounding wire with an appropriate grounding plug. The plug must be plugged into an outlet that is properly installed and grounded in accordance with all local codes and ordinances.

Grounded Plug

Model that is permanently wired:

This product must be connected to a grounded, metallic, permanent wiring system, or an equipment grounding terminal or lead on the product.

Power supply wiring must conform to all required safety codes and be installed by a qualified person. Check that supply voltage agrees with that listed on product nameplate.

Extension cords:

Use only a 3-wire extension cord that has a 3-blade grounding plug. Connect extension cord plug to a matching 3-slot receptacle. Do not use an adapter. Make sure your extension cord is in good condition. Check that the gage wire of the extension cord is the correct size wire to carry the current this product will draw.

An undersized cord is a potential fire hazard, and will cause a drop in line voltage resulting in loss of power causing the product to overheat. The following table indicates the correct size cord for length required and the ampere rating listed on the product nameplate. If in

doubt, use the next heavier gage cord. The smaller the gage number, the heavier the wire gage.

Minimum gage for extension cords

Amps Volts Length of cord in feet

120v 25 50 100 150 200 250 300 400 500 240v 50 100 200 300 400 500 600 800 1000

0-2 18 18 18 16 16 14 14 12 12 2-3 18 18 16 14 14 12 12 10 10 3-4 18 18 16 14 12 12 10 10 8 4-5 18 18 14 12 12 10 10 8 8 5-6 18 16 14 12 10 10 8 8 8 6-8 18 16 12 10 10 8 6 6 6 8-10 18 14 12 10 88664 10-12 16 14 10 886644 12-14 16 12 10 866642 14-16 16 12 10 866442 16-18 14 12 8 864422 18-20 14 12 8 664422

Start Up

If motor fails to start or slows down significantly under load, shut off and disconnect from power supply. Check that the voltage is correct for motor and that motor is turning in the proper direction. Check the plug, cord and switch for damage. If so equipped, the thermal protection switch has tripped, the motor can restart after cooling.

It is your responsibility to operate this product at recommended pressures or vacuum duties and room ambient temperatures. Do not start against a vacuum or pressure load.

Grounding Pin

120-volt grounded connectors shown. 220/240-volt grounded connectors will differ in shape.

Grounded Outlet

WARNING

Injury Hazard

Install proper safety guards as needed. Keep fingers and objects away from openings and

rotating parts. When provided, motor terminal covers must be in

place for safe operation. Product surfaces become very hot during operation,

allow product surfaces to cool before handling. Air stream from product may contain solid or liquid

material that can result in eye or skin damage, wear proper eye protection.

Wear hearing protection. Sound level from motor may exceed 70 dBA.

Failure to follow these instructions can result in burns, eye injury or other serious injury.

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