Graco TI7700 Bedienungsanleitung

Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441

311209 rev.F

Instructions - Parts

Hot Melt

Dispense Guns

For dispensing non-flammable hot melt thermoplastic sealants and adhesives.

3500 psi (24.1 MPa, 241 bar) Maximum Working Pressure

See page 2 for model information.

Important Safety Instructions

Read all warnings and instructions in this manual.

Save these instructions.

TI7701

TI7700

Bottom feed model

Top feed model

Models

2311209F

Contents

Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

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

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Connect Heated Hose . . . . . . . . . . . . . . . . . . . . . 5

Connect Electrical Cable . . . . . . . . . . . . . . . . . . . 5

Ground the System . . . . . . . . . . . . . . . . . . . . . . . 6

Pressure Relief Procedure . . . . . . . . . . . . . . . . . . . 7

Trigger Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Heatup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Dispensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Install New Heater Cartridge(s), RTD Sensor, or

Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Inspection Frequency . . . . . . . . . . . . . . . . . . . . 12

Adjust Needle Assembly . . . . . . . . . . . . . . . . . . 12

Service Valve Stem and Seal . . . . . . . . . . . . . . 12

Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 22

Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 22

Models

Model 249514 Bottom Feed

Model 249512 Bottom Feed with Trigger Switch

Model 249515 Top Feed

Model 249513 Top Feed with Trigger Switch

Model 297273 Top Feed with Swirl

Model 297274 Bottom Feed with Swirl

Warnings

311209F 3

Warnings

The following warnings are for the safe setup, use, grounding, maintenance, and repair of this equipment. The excla-

mation point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risk. Refer

back to these warnings. Additional, product-specific warnings may be found throughout the body of this manual

where applicable.

WARNING

BURN HAZARD

Equipment surfaces and fluid that’s heated can become very hot during operation. To avoid severe

burns, do not touch hot fluid or equipment. Wait until equipment/fluid has cooled completely.

PERSONAL PROTECTIVE EQUIPMENT

You must wear appropriate protective equipment when operating, servicing, or when in the operating

area of the equipment to help protect you from serious injury, including eye injury, inhalation of toxic

fumes, burns, and hearing loss. This equipment includes but is not limited to:

• Protective eyewear

• Clothing and respirator as recommended by the fluid and solvent manufacturer

•Gloves

• Hearing protection

ELECTRIC SHOCK HAZARD

Improper grounding, setup, or usage of the system can cause electric shock.

• Turn off and disconnect power cord before servicing equipment.

• Use only grounded electrical outlets.

• Use only 3-wire extension cords.

• Ensure ground prongs are intact on sprayer and extension cords.

• Do not expose to rain. Store indoors.

SKIN INJECTION HAZARD

High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may look like just

a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.

• Do not point gun at anyone or at any part of the body.

• Do not put your hand over the spray tip.

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

• Do not spray without tip guard and trigger guard installed.

• Engage trigger lock when not spraying.

• Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning,

checking, or servicing equipment.

Warnings

4311209F

FIRE AND EXPLOSION HAZARD

Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent

fire and explosion:

• Use equipment only in well ventilated area.

• Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic drop

cloths (potential static arc).

• Keep work area free of debris, including solvent, rags and gasoline.

• Do not plug or unplug power cords, or turn power or light switches on or off when flammable fumes

are present.

• Ground all equipment in the work area. See Grounding instructions.

• Use only grounded hoses.

• Hold gun firmly to side of grounded pail when triggering into pail.

• If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment

until you identify and correct the problem.

• Keep a working fire extinguisher in the work area.

EQUIPMENT MISUSE HAZARD

Misuse can cause death or serious injury.

• Do not operate the unit when fatigued or under the influence of drugs or alcohol.

• Do not exceed the maximum working pressure or temperature rating of the lowest rated system

component. See Technical Data in all equipment manuals.

• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all

equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information

about your material, request MSDS forms from distributor or retailer.

• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manu-

facturer’s replacement parts only.

• Do not alter or modify equipment.

• Use equipment only for its intended purpose. Call your distributor for information.

• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.

• Do not kink or over bend hoses or use hoses to pull equipment.

• Keep children and animals away from work area.

• Comply with all applicable safety regulations.

TOXIC FLUID OR FUMES HAZARD

Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or

swallowed.

• Read MSDS’s to know the specific hazards of the fluids you are using.

• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.

MOVING PARTS HAZARD

Moving parts can pinch or amputate fingers and other body parts.

• Keep clear of moving parts.

• Do not operate equipment with protective guards or covers removed.

• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment,

follow the Pressure Relief Procedure in this manual. Disconnect power or air supply.

WARNING

Installation

311209F 5

Installation

Install gun as follows:

• connect material hose

• connect the electrical cable

• make sure the gun is grounded

Connect Heated Hose

1. Screw adapter onto gun swivel (A) and tighten

securely.

2. Securely connect hose to gun swivel (A).

3. Wrap connection with insulating cuff (B) (119889).

Connect Electrical Cable

1. Wrap hose cable around hose one time. Connect

electrical cable from hose to gun cable; engage

metal clip on top of connector.

2. Place flat side of cable connection against hose,

making sure metal clip faces away from hose. This

will prevent damage to hose from clip rubbing

against it.

3. Fasten Velcro insulation wrap (198422) snugly

around hose. Secure wrap with two Velcro straps

(198442) on ends of wrap.

Part No. Adapter Hose Size

120264 -8 JIC x -10 JIC -8

-- Not required -10

120265 -10 JIC x -12 JIC -12

FIG. 1: Hose Gun Swivel

FIG. 2: Insulating Cuff

TI8057

TI8056

FIG. 3: Connect Electrical Cable, Step 1

FIG. 4: Connect Electrical Cable, Step 2

FIG. 5: Connect Electrical Cable, Step 3

Installation

6311209F

Ground the System

The following grounding instructions are minimum

requirements for a basic dispensing system. Your sys-

tem may include other equipment or objects that must

be grounded. Check your local electrical code for

detailed grounding instructions for your area and type of

equipment. Your system must be connected to a true

earth ground.

•Fluid hoses: use only grounded fluid hoses with a

maximum of 25 feet (7.5 m) combined hose length

to ensure grounding continuity. Check electrical

resistance of your fluid hoses at least once a week.

If your hose does not have a tag on it that specifies

the maximum electrical resistance, contact the hose

supplier or manufacturer for the maximum resis-

tance limits. If the hose resistance exceeds the rec-

ommended limits, replace it immediately.

•Gun: the gun is grounded by connecting it to the

properly grounded fluid hose and by a ground wire

in the cable. Check ground continuity between the

gun body and the heat control ground lug.

•Fluid supply container: ground according to the

local code.

•Flammable liquids in the dispense area: must be

kept in approved, grounded containers. Do not store

more than the quantity needed for one shift.

•All solvent pails used when flushing: ground

according to local code. Use only metal pails, which

are conductive. Do not place the pail on a non-con-

ductive surface, such as paper or cardboard, which

interrupts the grounding continuity.

To maintain grounding continuity when flushing or reliev-

ing pressure: hold a metal part of the gun firmly to the

side of a grounded metal pail, then trigger the gun. To

reduce the risk of static sparking, ground the pump,

object being dispensed to, and all other spraying/dis-

pensing equipment used or located in the spraying/dis-

pensing area. Check your local electrical code for

detailed grounding instructions for your area and type of

equipment.

Pressure Relief Procedure

311209F 7

Pressure Relief

Procedure

Trigger Lock

Always engage trigger lock when you stop spraying to

prevent gun from being triggered accidentally by hand or

if dropped or bumped.

To engage trigger lock, release trigger and rotate lock

downward. See FIG. 6.

To disengage trigger lock, rotate it upward. See FIG. 7.

1. Fully release gun trigger and engage gun trigger

lock. See FIG. 6.

2. Shut off fluid supply pump.

3. Hold a metal part of gun firmly to side of a grounded

metal waste container. Disengage gun trigger lock.

See FIG. 7. Trigger gun to relieve fluid pressure.

4. Fully release gun trigger and engage gun trigger

lock. See FIG. 6.

5. Open pump drain valve to help relieve fluid pressure

in pump, hose, and gun. Triggering gun to relieve

pressure may not be sufficient. Have a container

ready to catch drainage.

6. Leave drain valve open until you are ready to dis-

pense again.

7. If you think the gun nozzle or fluid hose is completely

clogged or that pressure has not been fully relieved

after following the previous steps, very slowly loosen

hose end coupling and relieve pressure gradually,

then loosen coupling completely. Clear nozzle or

hose obstruction

Do not try to force trigger valve open with trigger

lock engaged. This could result in component fail-

ure.

FIG. 6: Trigger Lock Engaged

FIG. 7: Trigger Lock Disengaged

Trigger Lock

Engaged

TI8049

Trigger Lock

Disengaged

TI8050

Operation

8311209F

Operation

Heatup

1. Turn ON electrical controls and main air to unit.

2. Lock dispense valve trigger open by pulling and

securing trigger using trigger retainer (Z).

3. Activate heat controls.

4. After pump, hose, and gun are up to temperature,

release gun trigger retainer (Z) to close valve.

Engage gun trigger lock to prevent accidental dis-

pense of high pressure heated fluid.

Heated fluid expands, causing a pressure rise in a

closed system.

• Relieve pressure (page 7) before heating up

equipment.

• Engage trigger retainer to hold gun open, to pre-

vent excessive pressure buildup.

FIG. 8: Trigger Retainer Locked

TI8051 FIG. 9: Trigger Retainer Unlocked and Trigger Lock

Engaged

Trigger Lock

Engaged

TI8049

TI8052

Operation

311209F 9

Dispensing

1. Start pump. Fluid flow rate is controlled at pump.

Adjust pump pressure to obtain desired flow rate.

Use lowest pressure necessary to dispense fluid.

The pressure adjustment depends on hose length,

fluid viscosity, and nozzle size.

2. Disengage gun trigger lock.

3. Squeeze trigger in all the way. Fluid flow begins with

the slightest pressure on trigger and stops when

trigger is released.

Shutdown

1. Turn off all heat at controller.

2. Shut off fluid supply pump.

3. Trigger gun to relieve pressure while system is still

hot.

4. With gun over a waste container, hold trigger open

by securing with trigger retainer (Z).

FIG. 10: Trigger Lock Disengaged

Trigger Lock

Disengaged

TI8050

TI8051

Troubleshooting

10 311209F

Troubleshooting

Some solutions require disassembling gun. Always

relieve system pressure and disconnect electrical cable

before performing these procedures.

Problem Cause(s) Solution(s)

Material leaks from front of gun body Seat or packing is worn

Obstruction inside gun

Worn needle

Replace seat (6) or packing (47).

Remove seat (6). Check and replace

if necessary.

Check and replace needle (4a) if nec-

essary.

Material leaks from back of gun body Needle seal or packing is worn Replace seals (4c) or packing (4d).

Gun does not shut off Needle or seat is worn

Spring is broken or not installed cor-

rectly

Obstruction inside gun

Replace needle (4a) or seat (6).

Check and replace spring (14) if nec-

essary.

Remove seat (6). Check and replace

if necessary.

Gun does not heat material Loose heater wires

Loose sensor wires

Heater cartridge failed

Sensor failed

Temperature controller failed

No power to heating circuitry

Check and reconnect wire connec-

tions.

Check and reconnect wire connec-

tions.

Replace failed heater.

Replace failed sensor.

Refer to Therm-O-Flow®200 manual

311208 as appropriate.

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