With Heat; Heat Fluid - Graco XM Series Operation Manual

8. Run the pumps until the material has reached the
desired temperature. See Heat Fluid, page 31.
9. Once desired temperature is reached, press
10. Turn off the main air shutoff valve (CA).
CA
11. Close recirculation valves (AC, AD).
AC
12. See Spray, page 32.
NOTE:
If you circulate the A side pump at pressures greater
than 3000 psi (21 MPa, 210 bar), an advisory is issued
and the yellow LED on the display illuminates. This is a
reminder to select Spray mode prior to spraying and to
circulate at a lower pressure to avoid excessive pump
wear.
If you circulate the A side pump above 5200 psi (35.4
MPa, 354 bar), an alarm shuts the pump down to pre-
vent accidentally spraying material while still in circula-
tion mode.
312359J

With Heat

Using recirculation mode when heating the material is
required. Note the temperature at the top of the heater
. (outgoing or back to hopper). When the thermometer
and display reach operating temperature, the material is
ready to spray.

Heat Fluid

To heat fluid evenly throughout the system:
1. Circulate fluid at approximately 1 gpm (10-20
cycles/min.) to raise temperature of hoppers to
80-90° F (27-32° C).
2. Decrease circulation rate to approximately 0.25 gpm
(5 cycles/min.) to increase the heater outlet temper-
ature to match the spray temperature.
NOTE:
Circulating fluid too quickly without decreasing the circu-
lation rate will increase only the hopper temperature.
Similarly, circulating fluid too slowly will increase only
the heater outlet temperature.
AD
NOTE:
Agitate, recirculate, and heat material only as necessary
to avoid mixing air into the fluid.
Recirculate
31