background image

Maintenance

313259B

19

Maintenance

Check double wall hopper heating fluid level 
monthly. Add fluid as needed.

Do not overfill when using oil. See overfilling 
notice on page 18.

Follow pump maintenance instructions in Husky 716 
diaphragm pump manual 308981.

Follow heater maintenance instructions in Viscon 
HP manual 309524.

Troubleshooting

Problem

Cause

Solution

Fluid fittings leaking.

Loose fittings.

Tighten fittings after system reaches 
desired temperature.

Hose not heating to desired tempera-
ture.

Diaphragm flow rate set too high.

Decrease diaphragm pump flow rate 
to 50 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 overflowing out vented hopper 
side fill port during startup.

Oil level higher than 3 in. (76.2 mm) 
below fill port at room temperature 
and at rest.

Lower oil level to 3 in. (76.2) below 
hopper fill port.

Hopper not reaching set temperature 
when heating fluid hose first.

Temperature loss in heated hose is 
too much for the heater capacity to 
compensate for.

Allow longer heating time. Insulate 
heated hose bundle.

Air and heating fluid splatter is exiting 
hopper vented fitting.

Diaphragm in Husky 716 diaphragm 
pump is cracked.

Replace pump diaphragm. See man-
ual 308981 for parts.

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...

Reviews: