Graco THERM-O-FLOW T7 Series Instructions Manual
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Graco THERM-O-FLOW T7 Series Instructions Manual

Graco THERM-O-FLOW T7 Series Instructions Manual

For melting and pumping non-explosive hot melt thermoplastic adhesives. hot melt tank.
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Instructions
THERM-O-FLOW
Hot Melt Tank T7
For melting and pumping non-explosive hot melt thermoplastic
adhesives. Not recommended for water-based curable or
solvent-based adhesive.
Model 234251
115 VAC
Model 234252
230 VAC
300 psi (2.0 MPa, 20.6 bar) Maximum Working Pressure
Important Safety Instructions.
Read all warnings and instructions in this
manual. Save these instructions.
See page 2 for table of contents.
Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441
Copyright 2004, Graco Inc. is registered to I.S. EN ISO 9001
®
309832D

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Summary of Contents for Graco THERM-O-FLOW T7 Series

  • Page 1 Important Safety Instructions. Read all warnings and instructions in this manual. Save these instructions. See page 2 for table of contents. Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441 Copyright 2004, Graco Inc. is registered to I.S. EN ISO 9001...

  • Page 2: Table Of Contents

    Graco Standard Warranty ....50 Graco Information ......50...

  • Page 3: Warnings

    Do not alter or modify equipment. • For professional use only. • Use equipment only for its intended purpose. Call your Graco distributor for information. • Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces. •...

  • Page 4: Installation

    Installation Installation On/Off Switch and Circuit Breaker ® THERM-O-FLOW T7 Hot Melt System is used for melt- ing and pumping hot melt thermoplastic adhesives. The The on/off switch and circuit breaker (R) is a manual cir- system consists of the melt unit, up to two heated supply cuit breaker and also a magnetic breaker.

  • Page 5: Accessories

    Installation Accessories Install the following accessories shown in F . 2, using adapters as necessary. Hoses • Heated Hose (J): allows adhesive to flow from the Hose Part Extrusion, Length tank to the applicator while maintaining the set tem- Spray/Swirl perature.
  • Page 6 Installation . 2: Typical Installation Key: T7 Hot Melt Tank Timer (required for automatic application) Air Controller (required for airspray and swirl application) EG Applicator VEA Applicator AG Applicator Handgun Applicator COM-PAK Applicator Fluid Hose Hose Electrical Connector Timer to Tank Power Cord 309832D...

  • Page 7: Front Panel Display

    Installation Front panel display Set Temperature Standby Pump Standby Pump Speed Increment- Loop Select Up Temperature Toggle Status On/Off Indicator Decrement Pump Speed Increment- Decrement Pump Status Range Actual Indicator Temperature Open Sensor Error Over Temperature Error Loop Select Pump Functions Loop Select Down Pump Function On/Off...
  • Page 8 Installation Front panel display See F . 3. Control Name Function Loop Select Up/Down Selects device for modification. Lights to the left of device signify the device is ready to be modified. Enables temper- ature Range Digit LED and Actual Temperature LED. Set Temperature Selects the temperature range digit and set point tempera- Increment/Decrement...
  • Page 9 Installation Control Name Function Range Digit Shows the range currently set for the tank, hose, and head temperatures. See Temperature Range Chart, page 15. Pump Status Indicates if pump is on or off. Shows RED if pump is off or the tank is not ready.

  • Page 10: Setup

    Setup Setup Mounting hot melt tank Bolt the hot melt tank securely to appropriate surface. Bolt holes are provided on the base of the tank. Mount tank where hose fittings are accessible from the bottom of the tank with wrenches. Floor mounting stand 118089 is available.

  • Page 11: Connecting Hose

    Setup Connecting hose Connect hose (J) to fluid outlet fitting (P). Tighten with 11/16 in (mm) opened end wrench. WARNING To avoid accidental system pressurization or electrical shock, disconnect power cord and turn the on/off switch to OFF. See Warnings, page 3. WARNING To prevent hose damage, do not flex hose when cold.

  • Page 12: Connecting Applicator

    310803 Automatic Applicator manual • 310803 Automatic Applicator manual Pattern controllers supplied by Graco come with termi- nated cables to simplify connection to the melt system. A cable with one end unterminated (118243) is available to allow connection of a customer-supplied controller into the melt system.

  • Page 13: Adding Material To Tank

    Setup Adding material to tank Electrical wiring The hot melt tanks use single phase, 100 to 130 VAC or 200 to 240 VAC, 50 to 60 Hz power sources, each with earth ground for safety. The 115 VAC tanks come WARNING equipped with a 15 amp molded plug for convenient connection to a 115 VAC, 20 amp grounded receptacle.

  • Page 14: Operation

    Operation Operation Pressure relief procedure Make sure material in tank is completely dispensed. WARNING Follow Pressure Relief Procedure, page 14. Follow Pressure relief procedure when you stop spraying and before cleaning, checking, servicing, or transporting equipment. Read Warnings, page 3. Shut off pump motor.

  • Page 15: Starting The Hot Melt System

    Operation Starting the hot melt system Once the tank device is selected and LED is Plug in hot melt system. GREEN, press the loop select up four times. The range indicator digit will begin flashing. Turn on/off switch (R) ON. See F .
  • Page 16 Operation Selecting hoses and applicators Setting pump control and speed The pump will not operate until the tank is within 90% of set temperature. The tank is at temperature Use the loop select up/down to scroll through when all device LEDs are flashing GREEN. and select each device Press the pump on/off Press the loop select on/off...
  • Page 17 Operation Setting auxiliary controls To resume operation, press the standby Auxiliary input selection is accomplished on per channel basis and can only be accessed when the control is in toggle standby mode. Press the standby toggle Setting standby timer Setting the standby will turn off the tank, hose, and applicator heat for a selected amount of time.

  • Page 18: Dispensing Material

    Operation Dispensing material To adjust flow of material, turn the pressure regula- tor (Q), using a 10 mm hex wrench. Do not operate hot melt unit until material in tank is at set temperature. The pump will not operate until •...

  • Page 19: Maintenance

    Maintenance Maintenance Daily Maintenance Tank Screen Inspection Before powering up the hot melt system perform the fol- A screen 118211 is located at the bottom of the tank to lowing checks. prevent contaminants from damaging the pump assem- bly. Inspect and clean screen on a regular basis. Inspect when tank is close to or is empty of material.

  • Page 20: Troubleshooting

    Troubleshooting Troubleshooting Problem Cause Solution Front panel not lit. Unit not plugged in or turned on. Plug in unit. Turn on/off switch ON. Wire harness connections not con- Check all power supply connections nected or need replacing. Fuse dis- to the front panel. Replace if neces- connected or needs replacing.
  • Page 21 Troubleshooting Problem Cause Solution Tank not heating or taking a long time Temperature range not selected. Check temperature range, see Front to heat and front panel is lit. Power supply to the heaters not con- panel display, page 8. Check fuse nected correctly.
  • Page 22 Troubleshooting Problem Cause Solution Low or no flow of material from unit. No power to tank. Plug in unit. Turn on/off switch ON. Front panel settings not properly set. See Adjusting panel controls, page Not enough material in tank. Add material. Material should not be higher than 1.5 in.

  • Page 23: Repair

    Repair Repair Tools Used • 11/16 in. wrench • 3/16 in. hex wrench • Phillips screw driver • 1/8 in. hex wrench • 1 in. wrench ® • Krytox lubricant • 5/16 in. socket wrench • 3/32 in. hex wrench •...
  • Page 24 Repair Remove bayonet ring from the electrical connector. See F . 5. Pull electrical connector (K) from the hose electrical receptacle (S). See F . 5. Using an 11/16 in. wrench, remove hose (J) from the fluid outlet fitting (P). .

  • Page 25: Replacing Front Panel

    Repair Replacing front panel Disconnect hose, see Replacing hose, page 23. Pull front panel (15) from tank. Disconnect 9-pin (X), 12-pin (Y), and ground wire (Z) connections. Disconnect any accessories connected to the auxil- iary bypass connector. Using 3/32 in. hex wrench, remove screws (17) from front panel shield (16).

  • Page 26: Replacing Front Panel Fuses

    Repair Replacing front panel fuses Removing tank cover Replacement fuses are available in fuse kit 118252. Using a 3/32 in. hex wrench, remove screws (17) and remove the front panel shield (16). Remove front panel. See Replacing front panel, page 25. Remove fuse board.

  • Page 27: Replacing Motor

    Repair Replacing motor For replacement parts, see Parts, page 38. Remove front panel, see Replacing front panel, From bottom of tank, remove screws and washers page 25. (23, 24, 25). Pull motor (34) from tank. Remove tank cover, see Removing tank cover page 26.

  • Page 28: Replacing Coupling Assembly

    Repair Replacing coupling assembly For replacement parts, see Parts, page 38. See F . 6. Using a 1/8 in. hex wrench, remove motor side set screw (35f). Slide motor side coupler (35a) from motor shaft. WARNING To avoid accidental system pressurization or electrical shock, disconnect power cord and turn the on/off switch to OFF.

  • Page 29: Replacing Pump

    Repair Replacing pump Using a 1/4 in. hex wrench, remove cap screws WARNING (31). Pull pump (30) from tank. To avoid accidental system pressurization or electrical shock, disconnect power cord and turn the on/off switch to OFF. Read Warnings, page WARNING Wait until equipment/fluid has cooled completely.
  • Page 30 Repair Using a 3/16 in. hex wrench, remove cap screw (53). Remove housing retainer (54). Remove pump seal housing (56). From housing (56), remove shaft seal (55) and thrust washer (57). Inspect for damage and replace. Remove o-ring (61). Inspect for damage and replace.

  • Page 31: Replacing Pressure Adjuster

    Repair Replacing pressure adjuster For replacement parts, see Parts, page 42. Using a 3/32 in. hex wrench, loosen set screw (87). Loosen and remove knob (88). WARNING To avoid accidental system pressurization or From the body (86), remove shaft (82), u-cup (84), electrical shock, disconnect power cord and turn and o-ring (85).
  • Page 32 Repair Reassembly Refer to F . 9 for the following instructions. Lubricate and assemble o-ring (78) onto seat (79). Using a 3/16 in. hex wrench, thread seat (79) into pressure adjuster insert. Place spring (81) into poppet (80). Rest poppet (80) onto shaft (82) and insert remaining pressure adjuster assembly into the pump.

  • Page 33: Replacing Fluid Outlet Fittings

    Repair Replacing fluid outlet fittings Replacing motor control board fuse 118321 For replacement parts, see Parts, page 38. Turn on/off switch to OFF. Unplug tank unit. WARNING To avoid accidental system pressurization or electrical shock, disconnect power cord and turn Remove tank cover, see Removing tank cover, the on/off switch OFF.

  • Page 34: Replacing Over Temperature Switch Assembly

    Repair Replacing over temperature switch assembly For replacement parts, see Parts, page 40. Turn on/off switch to OFF. Unplug tank unit. From top of power supply, disconnect motor wire harness. Pull power supply away from the tank. Remove tank cover, see Removing tank cover, page 25.

  • Page 35: Replacing Tank Heaters And Thermistor Assembly

    Repair Replacing tank heaters and thermistor assembly For replacement parts, see Parts page 40. To replace thermistor assembly, disconnect ther- Remove front panel, see Replacing front panel, mistor wire connection. page 25. Using a 5/8 box wrench, slide thermistor wires Remove tank cover, see Replacing tank cover, through wrench and place wrench around retaining page 26.

  • Page 36: Parts

    Parts Parts Housing assembly ▲ ▲ ti5398a 309832D...
  • Page 37 Parts Housing Assembly Ref. Part No. Description Qty. 118195 HOUSING COVER KNOB SCREW, 1/4-20 x 3/8 in SPRING SHIELD, cover WASHER, flat #8 s.s. RIVET, s.s. #43 GASKET, long GASKET, short SCREW, ph, #10 x 1/2 taping SCREW, hex; #10-32 x 1/2 in WASHER, lock #10 split NUT, hex #10-32 118196 ELEC.

  • Page 38: Motor, Pump To Frame And Tank Assembly

    Parts Motor, pump to frame and tank assembly 32† 33† 32† ti5197a 309832D...
  • Page 39 Parts Motor, pump to frame and tank assembly Ref. Part No. Description Qty. BASE 118197 TANK ASSEMBLY, 230V 118196 TANK ASSEMBLY, 115V 119991 INSULATION KIT (5 pieces) WASHER, insulating; 3/8 x 3/4 in. SCREW, hex; #10-32 x 1/2 in. WASHER, lock #10 split WASHER, flat #10 WASHER, insulating 1/4 x 3/4 in.

  • Page 40: Tank Assembly

    Parts Tank assembly ti5396a Ref. Part No. Description Qty. CASTING 118173 HEATER, tank; 115V 118174 HEATER, tank; 230V 118209 THERMISTOR ASSY. (includes 45 and 46) SPRING NUT, retainer SWTICH ASSY., over temp. SCREW, cap #6-32 x 1/2 in. FITTING, #14 tank insert 118211 SCREEN, tank filter;...
  • Page 41 Parts 309832D...

  • Page 42: Pump And Pressure Adjuster Assembly

    Parts Pump and pressure adjuster assembly Pump assembly 118439 includes items 53-79. Pressure adjuster assembly 118180 includes items 80-88. 78† 83† 85† 79† TI5395a 80† 82† 84† 309832D...
  • Page 43 Parts Pump and pressure adjuster assembly Pump assembly 118439 includes items 53-79. Pressure adjuster assembly 118180 includes items 80-88. Ref. Part No. Description Qty. SCREW, cap 1/4-20 x 1 RETAINER, housing SEAL, shaft HOUSING, pump seal WASHER, thrust SCREW, cap 1/4-20 x 2 SHAFT, pump PIN, dowel, 3/16 diam x 2 in O-RING...

  • Page 44: Schematics

    Schematics Schematics Front panel harness 309832D...

  • Page 45: Base Harness

    Schematics Base harness 309832D...

  • Page 46: Base Wiring

    Schematics Base wiring 309832D...

  • Page 47: Dimensions

    Dimensions Dimensions ( MOUNTING HOLES ) HOLE 1 HOLE 2 ( MOUNTING HOLES ) 309832D...

  • Page 48: Technical Data

    Technical Data Technical Data Application temperature up to 425°F (218°C) Tank temperature up to 395°F (202°C) Temperature accuracy ± 2% Melt rate 28 lb/hr (12.7 kg/hr) Viscosity range up to 30,000 centipoise Tank capacity 14 lbs (7 liters) Power consumption 115V: 2300 watts max Melt unit: 900 watts 230V: 4600 watts max...
  • Page 49 Technical Data 309832D...

  • Page 50: Graco Standard Warranty

    With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.

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