Graco 245848, Instructions - Parts Manual

Page: 17 / 30

Maintenance
309524V 17
Maintenance
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 15.
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.
Draining Heater
(F
IG
. 12)
1. Follow Pressure Relief Procedure , page 15.
2. Remove heater inlet and outlet fittings. Have a con-
tainer ready to catch the fluid.
Unclogging Fluid Passages
(F
IG
. 13)
1. Drain the heater.
2. Remove the heater block (3) from the heater hous-
ing. See
Heater Block , page 21.
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.
To avoid fire and explosion:
• Flush equipment only in a well-ventilated area
• Ensure main power is off and heater is cool before
flushing
• Do not turn on heater until fluid lines are clear of
solvent
F
IG
. 12: Draining Heater
05550-524
Outlet
Inlet
F
IG
. 13: Unclogging Fluid Passages
05551-524
3
Pour in solvent