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All written and visual data contained in this document reflects the latest product information available at the time of publication. 

Graco reserves the right to make changes at any time without notice.

This manual contains English. MM 313259

Graco Headquarters: Minneapolis

International Offices: Belgium, China, Japan, Korea

GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440-1441

Copyright 2009, Graco Inc. is registered to ISO 9001

www.graco.com

Revised 12/2009

Graco Standard Warranty

Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in 
material and workmanship on the date of sale to the original purchaser for use. 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. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written 
recommendations.

This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty 
installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of 
non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of Graco equipment with 
structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or 
maintenance of structures, accessories, equipment or materials not supplied by Graco.

This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of 
the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The equipment will be returned 
to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect in material or workmanship, repairs will 
be made at a reasonable charge, which charges may include the costs of parts, labor, and transportation.

THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 
TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE

Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy 
(including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or 
consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the date of sale.

GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 
PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT 
MANUFACTURED BY GRACO
. These items sold, but not manufactured by Graco (such as electric motors, switches, hose, etc.), are subject to 
the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for breach of these 
warranties.

In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder, or 
the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of warranty, the 
negligence of Graco, or otherwise.

FOR GRACO CANADA CUSTOMERS
The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings entered into, 
given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu que la 
rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés, donnés ou intentés, à la suite 
de ou en rapport, directement ou indirectement, avec les procédures concernées.

Graco Information 

For the latest information about Graco products, visit www.graco.com.

TO PLACE AN ORDER, contact your Graco distributor or call to identify the nearest distributor.
Phone: 612-623-6921 or Toll Free: 1-800-328-0211 Fax: 612-378-3505

Summary of Contents for 256273

Page 1: ...use in explosive atmospheres Model 256273 Includes parts needed to assemble heated hose system Heated hose assembly and Viscon HP heater must be ordered separately See Technical Data on page 24 for Ma...

Page 2: ...ng 14 Tubing Lengths 14 Install 14 Setup 17 Connecting Additional Hose Lengths 17 Operation 18 Maintenance 19 Troubleshooting 19 Parts 20 Technical Data 24 Graco Standard Warranty 26 Graco Information...

Page 3: ...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 exc...

Page 4: ...during operation To avoid severe burns do not touch hot fluid or equipment Wait until equipment fluid has cooled completely TOXIC FLUID OR FUMES HAZARD Toxic fluids or fumes can cause serious injury o...

Page 5: ...mum total length of 300 ft 91 4 m See manual 309525 Single Hose Assemblies Dual Hose Assemblies A B C D Dual Hose Assembly A B Single Hose Assembly Part Maximum Pressure Rating psi MPa bar Hose Diamet...

Page 6: ...ivision 1 Group D Hazardous Locations Temp Code T2 482 F 250 C 20 C T amb 135 F 57 C See Technical Data page 24 for additional information 245863 A 240 4000 16 7 245864 A 480 4000 8 30 245862 A 200 40...

Page 7: ...Heated Hopper or Hose Circulation Kit 256273 313259B 7...

Page 8: ...Installation Key A Viscon HP Heater B Husky diaphragm pump C Hopper D Frame E Fluid circulation tubing NOTE See FIG 2 on page 9 for fluid schematic of heated fluid FIG 1 Heat Only Hoppers Configurati...

Page 9: ...M Side Mounted Hoppers SM Table 1 Tubing Lengths Section Tubing BM Hoppers in mm SM Hoppers in mm AA 1 2 in 65 1651 50 1270 AB 51 1295 4 35 889 AC 7 177 8 4 101 6 BA 3 4 in 40 1016 36 914 4 BB 29 736...

Page 10: ...pper D Frame E Fluid circulation tubing F Heated hose tee fittings see heated hose connections on page FIG 5 and FIG 6 on page 12 and 13 NOTE See FIG 6 on page 13 for fluid schematic of heated fluid F...

Page 11: ...ing lengths with side mounted hoppers SM and back mounted hoppers BM FIG 4 Fluid schematic for heating hoppers and heated hose 21 in 533 4 mm 27 in 685 8 mm 23 in 584 2 mm r_256273_313259_12 To Red Tu...

Page 12: ...ting to red tubing G Return hose tee fitting from blue tubing H Recirculation valve J Heated hose assembly purchase separately K Overflow tank used for only heated hose configuration NOTE See FIG 6 on...

Page 13: ...Typical Installation 313259B 13 FIG 6 Fluid schematic for heated hose RED BLUE G F Single Hose Shown 23 in 584 2 mm 38 in 965 2 mm 24 in 609 6 mm...

Page 14: ...r mounting configuration and heating choices Reference the fluid schematic from the configurations listed below to find the tubing lengths Heating hoppers only See FIG 2 on page 9 Heating hoses only S...

Page 15: ...g fitting 23 d Install bushing 12 and elbow fitting 17 on dia phragm pump 3 fluid outlet 4 Mount pump 3 on mounting bracket with four screws 2 See FIG 7 on page 15 5 Connect nipple 10 air regulator ga...

Page 16: ...d out let facing upward 10 Wire Viscon HP heater B to your voltage supply Follow wiring procedure in the Viscon HP manual 309524 11 If heating hoppers remove bottom plug P from hopper C Install elbows...

Page 17: ...t elbow fitting 7 to 1 1 2 gallon tank mani fold 23 with tubing 4 For heating hoppers and heated hose See fluid schematic on page 11 and parts on page 20 1 Connect A and B fluid hoses to shutoff check...

Page 18: ...y adjusting the pump s air regulator 7 until the pump cycles about 50 cycles min Do not use a higher flow rate as doing so will decrease system heating perfor mance and pump life Never exceed the hose...

Page 19: ...cycles min Problem with Viscon HP heater See troubleshooting in Viscon HP heater manual 309524 Diaphragm pump not operating cor rectly See troubleshooting in Husky 716 diaphragm pump manual 308981 Oil...

Page 20: ...irculation Kit For heating hoppers and heated hose To Red Tubing To Blue Tubing 7 11 7 11 13 13 13 32 31 32 31 30 4 4 16 29 29 4 4 Cut tubing to length See table on page 9 See Heater and Diaphragm Pum...

Page 21: ...rs BM Side Mounted Hoppers SM 7 11 32 31 16 29 4 4 32 31 7 11 13 4 29 30 29 12 17 16 29 29 4 4 7 11 7 11 30 13 4 1 Cut tubing to length See table on page 9 See Heater and Diaphragm Pump 3 Connections...

Page 22: ...Diaphragm Pump 3 Connections 9 12 17 31 10 19 5 2 3 21 13 8 7 17 13 8 8 For heating heated hose only For heating hoppers or hoppers and heated hose only 4 4 9 19 10 3 5 1 5 20 12 17 7 r_256273_313259...

Page 23: ...NG nipple short 1 4 18 npt 1 11 124070 BUSHING pipe 1 npt m x 1 2 npt f 2 12 C19683 BUSHING reducing 3 4 m x 3 8 f 1 13 117425 FITTING tee 1 2 in 13 mm OD tube 3 15 119402 CABLE coiled ground 1 16 054...

Page 24: ...6 6 bar Maximum Temperature Rating 140 F 60 C Wetted Parts High Pressure Fluid Hose Nylon Zinc Plated Carbon Steel Heated Fluid Circulation Tubing Polyether based Polyurethane nylon Heated Fluid Circ...

Page 25: ...Technical Data 313259B 25...

Page 26: ...anship repairs will be made at a reasonable charge which charges may include the costs of parts labor and transportation THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IM...

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