Graco VISCON HP 309524L - Manual (Page 16)

Maintenance
16 309524L
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 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.
Draining Heater
(F IG . 12)
1. Follow Pressure Relief Procedure, page 14.
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 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.
WARNING
Read warnings, pages 4 and 5. Make sure the main
power is off and heater is cool before doing mainte-
nance.
F IG . 12: Draining Heater
05550-524
Outlet
Inlet
F IG . 13: Unclogging Fluid Passages
05551-524
3
Pour in solvent