Graco G3000 Manual de operación

Instructions – Parts List

GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441

Volumetric Fluid

Flow Meter

High Pressure Meters

4000 psi (28 MPa, 276 bar) Maximum Working Fluid Pressure

G3000 Meter, Part No. 239716

0.02 to 1.0 gpm (75 to 3800 cc/min.) Flow Range

G3000HR Meter, Part No. 244292

0.01 to 0.5 gpm (38 to 1900 cc/min.) Flow Range

Low Pressure Meters

250 psi (1.72 MPa, 17.2 bar) Maximum Working Fluid Pressure

G250 Meter, Part No. 249426

0.02 to 1.0 gpm (75 to 3800 cc/min.) Flow Range

G250HR Meter, Part No. 249427

0.01 to 0.5 gpm (38 to 1900 cc/min.) Flow Range

308778K

Certified to CAN/CSA

22.2 No. E79–11–95

Conforms to ANSI/UL

standard 2279

Recognized Component

EExia II A T3

ITS03ATEX21212

Intrinsically Safe for Hazardous Locations (Class I; Division 1;

Group D) when used with an approved barrier only.

* CE mark approvals only apply to meters used as part of Graco

ProMix and PrecisionMix II Systems.

7378A

II 1 G

0359

Important Safety Instructions

Read all warnings and instructions in this

manual. Save these instructions.

TI7332A

G3000 and G3000HR

G250 and G250HR

2 308778

Table of Contents

Warnings 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Flow Meter Parts 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dimensions 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical Data 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pressure Drop Curve 17. . . . . . . . . . . . . . . . . . . . . . . . . .

Warranty 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Graco Information 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Symbols

Warning Symbol

WARNING

This symbol alerts you to the possibility of serious

injury or death if you do not follow the instructions.

Caution Symbol

CAUTION

This symbol alerts you to the possibility of damage to

or destruction of equipment if you do not follow the

instructions.

308778 3

WARNING

SKIN INJECTION HAZARD

Spray from leaks, or ruptured components can inject fluid into your body and cause extremely serious

injury, including the need for amputation. Splashing fluid in the eyes or on the skin can also cause

serious injury.

Fluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate

surgical treatment.

Do not stop or deflect fluid leaks with your hand, body, glove, or rag.

Follow the Pressure Relief Procedure on page 6 whenever you: are instructed to relieve pres-

sure; stop operation; or clean, check, or service the equipment.

Tighten all the fluid connections before operating the equipment.

Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately.

FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD

Improper grounding, poor air ventilation, open flames, or sparks can cause a hazardous condition and

result in fire or explosion and serious injury.

Ground the equipment as instructed in Grounding, page 5.

Never use the flow meter with an electrostatic gun isolation stand.

Keep liquids away from the electronic sensor device.

Follow the material supplier recommendations when flushing or servicing the meter.

Do not service the electronic sensor. Return it to your Graco distributor for service.

If there is any static sparking while using the equipment, stop spraying immediately. Identify and

correct the problem.

INSTRUCTIONS

EQUIPMENT MISUSE HAZARD

Equipment misuse can cause the equipment to rupture, malfunction, or start unexpectedly and result

in serious injury.

This equipment is for professional use only.

Read all instruction manuals, tags, and labels before operating the equipment.

Use the equipment only for its intended purpose. If you are uncertain about usage, call your Graco

distributor.

Do not alter or modify this equipment. Use only genuine Graco parts and accessories.

Check the equipment daily. Repair or replace worn or damaged parts immediately.

Do not exceed the maximum working pressure of the lowest rated system component. This equip-

ment has a 4000 psi (28 MPa, 276 bar) maximum working pressure.

Use fluids or solvents that are compatible with the equipment wetted parts. See the Technical

Data section of all the equipment manuals. Read the fluid and solvent manufacturer’s warnings.

Comply with all applicable local, state and national fire, electrical and other safety regulations.

4 308778

Installation

WARNING

FIRE, EXPLOSION, AND ELECTRIC

SHOCK HAZARD

To reduce the risk of fire, explosion, or

electric shock:

All electrical equipment must only be installed

by a qualified electrician.

Understand and follow your local code and

safety regulations for hazardous location wiring

of intrinsically safe circuits.

Dust and Foreign Matter

Avoid having dust or foreign matter enter the flow

meter by taking the following precautions:

Thoroughly flush the fluid supply lines before

installing the flow meter.

When installing fittings, make sure that no sealing

tape overlaps into the inside of the pipe.

Install a 100 mesh fluid filter upstream of the flow

meter.

Installing the Flow Meter

Flow volume can only be measured at the location

where the flow meter is installed.

The Fluid Flow Meters are intrinsically safe for

Class I; Division 1; Group D hazardous indoor

(NEMA 1) locations when installed with an intrinsi-

cally safe power device and wiring.

Refer to ANSI standards ISA-RP12.6,NEC Article

504 and the Canadian Electrical Code Appendix F.

Do not use more than 200 ft. (61 m) of cable.

Refer to Fig. 1 to locate and install the flow meter,

connectors, and fluid shutoff valves. Install a check

valve to prevent backflow. The arrows on the flow

meter and check valve show the direction of fluid

flow.

The shutoff valves allow you to isolate the meter for

service.

Refer to the Technical Data and Dimensional

Drawings for dimension, inlet/outlet size, tempera-

ture and other specifications.

Fig. 1

Electronic Sensor Device

Flow Meter

Fluid Shutoff Valve

on inlet side

Fluid Shutoff Valve

on outlet side

Fluid Line

Cable

Ground

Sheath

7379

Check Valve

G3000 and

G3000HR shown

308778 5

Installation

Grounding

WARNING

FIRE, EXPLOSION, AND ELECTRIC

SHOCK HAZARD

Proper electrical grounding of your

system is essential. For your safety,

read the warning section, FIRE, EXPLO-

SION, OR ELECTRIC SHOCK HAZARD, on

page 3.

1. Ground the flow meter by connecting a grounded

cable to the sensor.

Have a qualified electrician check the electrical

grounding continuity between the flow meter

sensor and a true earth ground; remove the cable

connector from the sensor and measure the resist-

ance from the cable connector Pin B to true earth

ground. Refer to Fig. 2.

If the resistance is greater than 25 ohms, check

the cable ground connection. Refer to Fig. 2.

Reconnect the ground sheath or replace the cable.

Do not operate the system until the problem is

corrected.

2. Always ground the fluid supply unit, using one of

the following options:

a. Mount the meter to a grounded conductive

surface, or

b. Connect the conductive fluid hose to the meter

inlet and outlet, or

c. Connect a ground wire to the meter’s M6

mounting holes.

3. Never use the flow meter with an electrostatic gun

isolation stand.

Fig. 2

Cable Connector (Solder Side)

A+10–30 Vdc Supply (red)

BGround (black)

CSignal Out (white)

7380

6 308778

Operation

Pressure Relief Procedure

WARNING

INJECTION HAZARD

The system pressure must be manually relieved to

prevent the system from starting or spraying acci-

dentally. Fluid under high pressure can be injected

through the skin and cause serious injury. To

reduce the risk of an injury from injection, splashing

fluid, or moving parts, follow the Pressure Relief

Procedure whenever you:

are instructed to relieve the pressure,

stop spraying,

check or service any of the system equipment.

1. Turn off the fluid supply to the meter.

2. Shut off all electrical power to the fluid system.

3. Follow the Pressure Relief Procedure for your fluid

system dispensing device.

Flow Meter Function

This is a positive displacement, gear flow meter. The

gear flow meter is highly accurate, even with low flow

rates. The fluid flowing through the meter rotates the

gears. The gear tooth is picked up by a sensor device,

which produces an impulse for every gear tooth pass-

ing by.

Recommended Usage

WARNING

COMPONENT RUPTURE HAZARD

Do not exceed the maximum working pressure of

your meter or any component or accessory in your

system.

See the Technical Data for fluid and ambient

temperature limits.

Only use the flow meter with fluids that are compat-

ible with the “Wetted Parts” listed in the Technical

Data.

Flow Volume Range

The G3000 and G250 meters flow volume range is

0.02–1.0 gal./min. (75–3800 cc/min.).

The G3000HR and G250HR meters flow volume range

is 0.01–0.5 gal./min. (38–1900 cc/min.).

CAUTION

The flow meter gears and bearings can be damaged

if they rotate at too high a speed. To avoid high

speed rotation, open the fluid valve gradually. Do not

over-speed the gear with air or solvent. To prolong

meter life, Do not use the meter above its maximum

flow rate.

Checking the Meter Accuracy

1. To check the accuracy of the meter, turn your gun

fan and atomizing air off, then trigger the fluid into

a graduated cylinder; dispense at least 500 cc of

fluid.

2. Measure the volume of fluid in the beaker in cubic-

centimeters (cc) and read the volume on the flow

meter monitor.

G3000 and G250: If the flow meter scale factor is

not between 0.112–0.140 cc/pulse, follow the

cleaning procedure on page 9, then recalibrate

the flow meter.

G3000HR and G250HR: If the flow meter scale

factor is not between 0.05–0.07 cc/pulse, follow

the cleaning procedure on page 9, then recali-

brate the flow meter.

308778 7

Troubleshooting

WARNING

INJECTION HAZARD

To reduce the risk of an injection injury or other

serious injury, follow the Pressure Relief Proce-

dure on page 6 before checking or servicing the

meter assembly.

NOTE: The sensor is not a serviceable part. Replace it

if it is malfunctioning.

Problem Cause Solution

No flow volume displayed at mon-

itoring unit

Flow volume is too low to measure Increase flow volume.

Fluid is not flowing See Problem: Fluid is not flowing,

below.

Damaged cable Replace cable.

Improper input voltage to sensor Make sure input power is 10–30 Vdc.

Damaged sensor Replace sensor if it is malfunctioning.

Fluid is not flowing Clogs in fluid line or in meter Clean fluid line and/or meter; see

Maintenance section.

Gears worn or damaged Service meter; see Maintenance

section.

8 308778

Maintenance

WARNING

FIRE AND EXPLOSION HAZARD

If the meter is not installed in an intrinsi-

cally safe installation, make sure the

power is off or the electronic sensor is

disconnected before wiping the outside

of the meter clean with a cloth damp-

ened in a compatible solvent or flushing

the meter.

CAUTION

Do not immerse the meter in solvent with the elec-

tronic sensor installed. Solvent could damage the

electrical components.

Air purge is not recommended for any gear-type flow

meter. Air purges do not provide the lubrication the me-

ter gears require.

Residue Build-up on the Meter Gears

Residue build-up may cause the meter gears to bind or

stop rotating, which decreases the meter accuracy and

makes meter recalibration necessary. As more build-up

occurs, recalibration is required more often.

The frequency that your meter requires cleaning

depends on the type of fluid being used. Excessive

residue build-up usually means that you are using

improper cleaning solvents and/or cleaning sequences

or processes.

Check the meter routinely to develop the correct

cleaning schedule.

Use the proper cleaning solvent for the fluid being

metered.

Flushing the Meter

WARNING

INJECTION HAZARD

To reduce the risk of an injection injury or other

serious injury, follow the Pressure Relief Proce-

dure on page 6 whenever you are instructed to

relieve pressure.

Flush the fluid supply line and meter fluid reservoir

daily with a compatible solvent as instructed below.

1. Follow the Pressure Relief Procedure, on

page 6.

2. Connect the fluid line to the solvent supply unit.

3. Flush the meter until it is clean.

4. Follow the Pressure Relief Procedure, then

disconnect the fluid line from the solvent supply

unit.

5. Reconnect the fluid line to the fluid (paint) supply.

6. Turn on the fluid supply.

7. Operate until the meter and fluid line are free of

solvent.

Maintenance continued on next page.

308778 9

Maintenance

Cleaning or Servicing the Meter Chamber

WARNING

INJECTION HAZARD

To reduce the risk of an injection injury or other

serious injury, follow the Pressure Relief Proce-

dure on page 6 whenever you are instructed to

relieve pressure.

WARNING

FIRE, EXPLOSION, AND ELECTRIC

SHOCK HAZARD

Installing and servicing this equipment

requires access to parts that may cause

electric shock or other serious injury if

the work is not performed properly. Do not install or

service this equipment unless you are trained and

qualified.

Use only genuine Graco replacement parts. Sub-

stitution of components may impair intrinsic safety.

This could result in a failure which causes serious

injury and/or substantial property damage.

NOTE: Clean and service the meter at a clean work-

bench. Use only lint-free cloth on parts.

1. Follow the Pressure Relief Procedure, on page

6. Then close the fluid shut-off valve on each side

of the meter.

2. Disconnect the cable from the electronic sensor

device.

3. Disconnect both fluid line fittings and remove the

meter from the fluid line.

4. Loosen the two screws and remove the electronic

sensor device from the flow meter upper housing.

See the parts drawing, page 10.

5. Loosen the screws. Keep a few threads of two

opposing bolts engaged to minimize the torque

stress on the shafts when you separate the meter

housings.

6. Hold onto the upper housing and gently tap the

opposing bolts to separate the lower housing.

CAUTION

To avoid damaging the shafts, keep the housings

parallel to each other when separating them; do not

rock the housings from side to side. Do not use

chisels or screwdrivers to split and pry apart the

housings.

7. Remove and inspect the gears and shafts. Clean

the meter parts with solvent.

8. Reassemble the gears and shafts into the lower

housing in the position they were removed from.

Check the gears for free and easy rotation.

9. Make sure the two locating pins are in place.

10. Assemble the two meter housings, making sure to

keep them parallel to each other.

11. Install the screws. Tighten them oppositely and

evenly, to 12 ft-lb (16 Nm). Do not over-tighten.

12. After re-assembling the meter, test the gear rota-

tion by applying a brief air blast to the meter inlet.

You should clearly hear the gears spin.

13. Set the electronic sensor on the upper housing

and tighten the two screws hand-tight, about 3.5

ft-lbs (4.7 Nm). Do not over-tighten.

10 308778

Parts

Use Only Genuine Graco Parts and Accessories

Model G3000

Part No. 239716

7381A

Item 3, Gear Meter Assembly,

Includes items 4–11

Ref.

No. Part No. Description Qty.

1 114100 SCREW, socket head; M4 x

55 mm long 2

2 239717 ELECTRONIC SENSOR;

includes item 2a 1

2a 290580 LABEL, identification 1

3 239719 GEAR METER ASSEMBLY;

includes items 4–12 1

4 110580 SCREW 12

5*HOUSING, upper 1

7 110588 O-RING; PTFE 1

Ref.

No. Part No. Description Qty.

8 239718 GEAR 2

9 192383 SHAFT, gear 2

10 192387 PIN, locating 2

11 * HOUSING, lower 1

* Not a replacement part. Order item 3, gear meter

assembly.

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