Gast DOA-P504-BN User Manual

OIL-LESS DIAPHRAGMP RT NO. 70 - 3005 G443 PL (Rev. D)

VACUUM PUMPS & COMPRESSORS

OPERATION & MAINTENANCE MANUAL

Model DOA Shown Model DAA 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.

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

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.

• Pressure units may be used for both pressure and vacuum. Consult your Gast Distributor/Representative

to use vacuum units for pressure.

ISO 9001 & 14001 CERTIFIED www.gastmfg.com

®Registered Trademark/™Trademark of Gast Manufacturing Inc., Copyright © 2002 Gast Manufacturing Inc. All Rights Reserved. 1

Your safety and the safety of others is extremely important.

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

This is the safetyalert symbol. Thissymbol a youto hazardsthat can killor hurtyouand others. The safety alert symboland the words “DANGER”and “WARNING”willprecede all safety messages. These wordsDANGERmean:

You will be killed or seriouslyinjuredif youdonʼtfollow instructions.

You can be killed or seriouslyinjuredif youdonʼtfollow instructions.

All safety messages willidentifythe hazard, tellyou how to reduce the chance of injury, and tell youwhat can happen if the safety instructionsare not followed.

INSTALLATION

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 flowover the productin any way can cause the productto 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.

Plumbing

Remove plugs from the IN and OUT ports. Connect with pipe and fittings that are the same size or larger than the productʼs threaded ports. Be sure to connect the intake and exhaust plumbing to the correct inlet and outlet ports. Portswillnot supportthe weightof the plumbing.

Accessories

Filters and mufflers are supplied with some models. These should be checked periodically and replaced when necessary. Please consult your Gast Distributor/Representative for additional filter recommendations.

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.

MotorControl

It is yourresponsibilityto contacta qualified electricianand assurethatthe electricalinstallationis adequateand in conformancewithall nationaland local codesand ordinances. The metalcapacitorshellmust 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.

Electrical Connection

	Electrical Shock Hazard
	This product must be properly grounded.
	Do not modify the plug provided. If it will not
	fill 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 with or without 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
2	death, fire or electrical shock.

Grounded Plug	Grounding Pin
120-volt grounded connectors
shown. 220/ 240-volt grounded
connectors will differ in shape.		Grounded Outlet
Model with a powersupplycord:
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 DIAGRAM A)
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.
Check witha qualified electricianor serviceman if the
grounding instructions are not completely understood,
or if youare not sure whether the product is properly
grounded. Do not modifythe plugprovided. If it willnot
fit the outlet,have the properoutlet installedby a
qualified electrician.
Model that is permanentlywired:
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.
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.
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 heaviergage cord. The smallerthe
gage number, the heavierthe wiregage.	3

-Minimumgage forextensioncords
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	8	8	6	6	4
10-12	16	14	10	8	8	6	6	4	4
12-14	16	12	10	8	6	6	6	4	2
14-16	16	12	10	8	6	6	4	4	2
16-18	14	12	8	8	6	4	4	2	2
18-20	14	12	8	6	6	4	4	2	2

OPER ATION

Injury Hazard

Install proper safety guards as needed.

Use only recommended air handling parts acceptable for pressure not less than 70 psi.

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.

Do NOT direct air stream at body. Air stream from product may contain solid or liquid material that can result in eye or skin damage, wear proper eye protection.

Do NOT spray flammable or combustible liquid. 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.

It is your responsibilityto operate thisproductat recommendedpressuresor vacuumdutiesand room ambient temperatures. Do not startagainsta vacuum or pressureload.

StartUp

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.