Gast DAA User Manual

www.gastmfg.com

ISO 9001 & 14001 CERTIFIED

®Registered Trademark/™Trademark of Gast Manufacturing Inc., Copyright ©2003 Gast Manufacturing Inc. All Rights Reserved.

PART NO. 70 - 3000 G442PL (REV-J)

OIL-LESS DIAPHRAGM

VACUUM PUMPS & COMPRESSORS

OPERATION & MAINTENANCE MANUAL

Model DOA Shown

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.

PLEASE READ THIS MANUAL COMPLETELY BEFORE INSTALLING AND USING

THIS PRODUCT. SAVE THIS MANUAL FOR FUTURE REFERENCE AND

Product Use Criteria:

• Pump only clean, dry air.

• Operate at 40ºF - 104ºF (4.4ºC - 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.

Model MOA Shown

KEEP IN THE VICINITY OF THE PRODUCT

Model DAA Shown

WARNING

Your safety and the safety of others

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WARNING

is extremely important.

e have provided many important safety messages in

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this manual and on your product. Always read and
obey all safety messages.

his is the safety alert symbol. This symbol

T
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

essages. These words mean:

m

Plumbing

Remove plugs from the IN and OUT ports. Connect

ith pipe and fittings that are the same size or larger

w
than the productʼs threaded ports. Be sure to connect
the intake and exhaust plumbing to the correct inlet and
outlet ports.

Accessories

ilters and mufflers are supplied with some models.

F
These should be checked periodically and replaced
when necessary. Please consult your Gast
Distributor/Representative for additional filter

ecommendations.

r

DANGER

e killed or seriously injured if you donʼt follow

b

ou will

Y
instructions.

WARNING

You can
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.

INSTALLATION

be killed or seriously injured if you donʼt follow

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.

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.

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.

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 shell must
be grounded.

Determine the correct overload setting required to
protect the motor (see motor starter manufacturerʼs
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 motorʼs 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.

OPERATION

Injury Hazard

Install proper safety guards as needed.

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.

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

It is your responsibility to operate this product at
recommended pressures or vacuum duties and room
ambient temperatures.

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.

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MAINTENANCE

c

WARNING

c

WARNING

WARNING

Electrical Shock Hazard

Disconnect electrical power supply cord before
performing maintenance on this product.

If product is hard wired into system, disconnect
electrical power at the circuit breaker or fuse box
before performing maintenance on this product.

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

Injury Hazard

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.

Clean this product in a well ventilated area.

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

SHUTDOWN PROCEDURES

It is your responsibility to follow proper shutdown
procedures to prevent product damage.
NEVER ADD OIL TO THIS OIL-LESS PUMP.

roper shutdown procedures must be followed to

P
prevent pump damage. Failure to do so may result in
premature pump failure. Gast Manufacturing Oil-Less
Diaphragm Vacuum Pumps and Compressors are

onstructed of ferrous metals or aluminum which are

c
subject to rust and corrosion when pumping
condensable vapors such as water. Follow the steps
below to assure correct storage and shutdown between

perating periods.

o

1. Disconnect plumbing.

2. Operate product for at least 5 minutes without
plumbing.

3. Run at maximum vacuum for 10 to 15 minutes.

4. Repeat step 2.

5. Disconnect power supply.

6. Plug open ports to prevent dirt or other
contaminants from entering product.

SERVICE KIT IN STALLAT ION

It is your responsibility to:

• Regularly inspect and make necessary repairs to
product in order to maintain proper operation.

• Make sure that pressure and vacuum is released

from product before starting maintenance.

Check intake and exhaust filters after first 500 hours of
operation. Clean filters and determine how frequently
filters should be checked during future operation. This
one procedure will help to assure the productʼs
performance and service life.

Solvent Cleaning

Use only Gast recommended Solvent or other
non-petroleum based solvent. Do Not use kerosene or
ANY other combustible solvent to clean product.

1. Remove the four (MOA) or five (DOA) screws in the

top of the product. Remove the top plate.

2. Remove filters and clean with Gast recommended

solvent or other non-petroleum based solvent.
Use compressed air to dry filters and make
sure that all moisture is removed. Reinstall filters.

3. Clean the gasket with water and dry thoroughly.

Reinstall gasket.

4. Reinstall top plate and screws.

Check that all external accessories such as relief valves
and gauges are attached to cover and are not damaged
before re-operating product.

Electrical Shock Hazard

Disconnect electrical power supply cord before
installing service kit.

If product is hard wired into system, disconnect
electrical power at the circuit breaker or fuse box
before installing service kit.

Disconnect air supply and vent all air lines to
release pressure or vacuum.

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

Gast will NOT guarantee field-rebuilt product
performance. For performance guarantee, the product
must be returned to a Gast Authorized Service Facility.

Service Kit contents vary. Most contain gaskets and
filter parts.

1. Disconnect electrical power to pump.

2. Disconnect air supply and vent all air lines to
release pressure or vacuum.

3. Remove the socket cap screws from the head of the
pump. Remove the head of the pump.

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