Gast SAA User Manual

70-7050 G505PL (Rev. E)

SOA/SAA/LOA/LAA OIL-LESS

VACUUM PUMPS &

COMPRESSORS

OPERATION &

MAINTENANCE MANUAL

CONTENTS:

General Information and Installation....................................................................................................... 2

Operation ................................................................................................................................................. 3

Maintenance and Shut-Down Procedures................................................................................................ 4

SAA/LAA Exploded View and Parts Ordering Information ................................................................... 5

SOA/LOA Exploded View and Parts Ordering Information ................................................................... 6

Service Kit Installation and Troubleshooting Guide ............................................................................... 7

Warranty and Authorized Service Facilities ............................................................................................ 8

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KEEP THIS DOCUMENT FOR FUTURE REFERENCE

This is the hazard alert symbol: m. When you see this
symbol, be aware that personal injury or property
damage is possible. The hazard is explained in the text
following the symbol. Read the information carefully
before proceeding.

The following is an explanation of the three
different types of hazards:

m DANGER Severe personal injury or death will

occur if hazard is ignored.

m WARNING Severe personal injury or death can

occur if hazard is ignored.

m CAUTION Minor injury or property damage

can occur if hazard is ignored.

If exposed to the elements unit must be weather-protected.

m WARNING Beware of any exposed and/or movable

parts. Proper guards should be in place to
prevent personal and/or property damage.

m CAUTION Do not block flow of cooling air ov er unit in

any wa y. This will cause unit to o verheat.

Mounting

Unit may be installed in any orientation as long as flow
of cool, ambient air over unit is not blocked. To reduce
noise and vibration, use shock mounts and affix unit to a
stable, rigid operating surface.

m CAUTION Remove plastic plugs in ports before

starting unit to avoid flying projectile and/
or lack of performance.

GENERAL INFORMATION

This unit is designed for moving air only and under no
circumstances is to be used with any other gases, fluids,
particles, solids, or any substance mixed with air.

m DANGER Pumping flammable or explosive gases or

operating this unit in an atmosphere
containing them can result in fire or
explosion damage to unit and surrounding
environment.

m CAUTION Do not allow corrosive gases or particulate

material to enter unit. Water vapor, oil­based contaminants, or other liquids must
be filtered out. Foreign materials will
damage unit by gumming up parts and
causing unit to fail.

m CAUTION This unit’s e xhaust air can become v ery hot.

Hot exhaust air can damage temperature­sensitive equipment and will burn skin if
exposed to air stream.

Ambient temperature should not exceed 40˚C (104˚F).
For operation at high temperatures, consult the factory.

Performance is reduced by low atmospheric pressure
found at high altitudes. Consult a Gast distributor for
details.

Never lubricate this oil-less piston unit. Most
components are made of aluminum and valves are
stainless steel.

INSTALLATION

m WARNING To avoid risk of electrocution do not use

this product in an area where it could
come in contact with water or other liquids.

Wiring

m WARNING Incorrect wiring can result in electric shock

and cause permanent damage to unit.

Wiring must conform to all required safety codes and be
installed by a qualified person. Grounding is required.
All power to motor must be de-energized and
disconnected when servicing.

Grounding Instructions

These instructions apply to 120-volt units and where
indicated to units wired for 220-240 volts. See motor
nameplate on unit for voltage requirements.

For all grounded, cord-connected products:

This product should be grounded. 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 is
equipped with a 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.

m DANGER

Improper installation of the grounding plug
can result in a risk of electric shock. 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 having an outer surface that
is green with or without yellow stripes is
the grounding wire.

Check with a qualified electrician or serviceman if the
grounding instructions are not completely understood, or if in
doubt as to 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.

2

For a grounded, cord-connected product rated less than 15
amperes and intended for use on a nominal 120 volt
supply circuit:

This product is for use on a nominal 120-volt circuit and has
a grounding plug that looks like the plug illustrated in Figure

1. Make sure that the product is connected to an outlet having
the same configuration as the plug. No adapter should be used
with this product

Figure 1

For all other grounded, cord-connected products:

This product is for use on a circuit having a nominal rating
more than I20 volts (or 220-240 volts) …and is
factory-equipped with a specific electric cord and plug to
permit connection to a proper electric circuit. Make sure that
the product is connected to an outlet having the same
configuration as the plug. No adapter should be used with this
product if the product must be reconnected for use on a
different type of electric circuit, the reconnection should be
made by qualified service personnel.

For a permanently connected product:

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

Extension Cords:

Use only a 3-wire extension cord that has a 3-blade grounding
plug, and a 3-slot receptacle that will accept the plug on the
product Make sure your extension cord is in good condition.
When using an extension cord, be sure to use one heavy,
enough to carry the current your product will draw. For
lengths less than 25 feet, No.18 AWG extension cords should
be used. An undersized cord will cause a drop in line voltage
resulting in loss of power and overheating.

Exception: A 2-conductor or 3-conductor extension cord may
be used for a double-insulated or 2-wire product.

Refer to wiring tag supplied with unit, for diagram
and capacitor option. For any DC unit - red lead goes

to positive side of power source.

Plumbing

To prevent air flow restriction, use pipe and fittings
that are same size or larger than unit’s threaded ports.

NOTE: Be sure to connect intake and exhaust plumbing

to correct inlet and outlet ports.

Accessories

Filters and mufflers are supplied on some models. Check
periodically and replace when necessary. Consult a Gast
Representative for f ilter recommendations. F or best
results, install relief valves and g auges at inlet or outlet, or
both, to monitor performance.

Electric Motor Control

Motor must be protected against short circuit, overload
and excessive temperature rise. Fuses, motor-protective
switches and thermal-protective switches provide
necessary protection in these circumstances. Fuses only
serve as a short circuit protection of motor (wiring
fault). Fuses in the incoming line should be chosen so as
to be able to withstand the starting current of the motor,
not as a protection against overload.

Motor starters, incorporating thermal-magnetic overload
or circuit breakers protect motor from overload or
reduced voltage conditions.

Selection of correct overload setting is required to
provide best possible protection. Refer to motor starter
manufacturer’s recommendations.

OPERATION

m WARNING Solid or liquid material exiting unit can

cause eye or skin damage. Keep away
from air stream.

m WARNING Disconnect power before servicing to

avoid electric shock or accidental start­up. The motor may be thermally pro­tected and will restart automatically when
it cools if the thermal protection switch is
tripped.

m WARNING Do not operate without grille(s), if pro-

vided, in place. Failure to do so could
result in severe personal injury.

m WARNING Head surface(s) can be very hot depend-

ing on unit duty and speed. Do not touch
these parts during operation.

m CAUTION Do not operate units above recom-

mended pressures or vacuum duties.
This will overheat unit.

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