Graco 309524N Maintenance, Flushing, Unclogging Fluid Passages, Draining Heater

Maintenance

Maintenance

WARNING

Read warnings, pages 4 and 5. Make sure the main power is off and heater is cool before doing mainte- nance.

Flushing

Clogged fluid passages are difficult to clean and reduce heating efficiency, flow rate, and pressure. Flush fre- quently, including whenever system is not in use.

1.Follow Pressure Relief Procedure, page 14.

2.Ensure main power is off and heater is cool before flushing. Use a compatible solvent, and follow flush- ing instructions in your fluid supply and spray gun manual. Do not turn on heater until fluid lines are clear of solvent.

Unclogging Fluid Passages

(FIG. 13)

1.Drain the heater.

2.Remove the heater block (3) from the heater hous- ing. See Heater Block, page 20.

3.Pour a high strength, compatible solvent into the heater tube to soften the clog.

4.Flush out the clog.

5.Clean all passages thoroughly before reassembling.

Pour in solvent

Draining Heater

(FIG. 12)

1. Follow Pressure Relief Procedure, page 14.

3

2.Remove heater inlet and outlet fittings. Have a con- tainer ready to catch the fluid.

05551-524

FIG. 13: Unclogging Fluid Passages

Outlet

Inlet

05550-524

FIG. 12: Draining Heater

16 309524N