Ep Gun; Md2 Valve - Graco HFR Setup And Operation

NOTE:
The return tube must reach the bottom of the reservoir
to ensure that isocyanate crystals will settle to the bot-
tom and not be siphoned into the supply tube and
returned to the pump.
14. Prime IsoGuard Select fluid cylinder
The IsoGuard Select fluid cylinder must be primed when
replacing IsoGuard Select fluid. See IsoGuard Select
System on page 74 for instructions.

EP Gun

1. Set pressure relief valves (SA, SB) to RELIEF.
2. Connect gun to machine. Verify gun is ready for
operation. See appropriate gun manual listed in
Related Manuals on page 3 for detailed instruc-
tions.
3. Engage gun safety lock.
4. Set PRESSURE RELIEF/DISPENSE valves (SA,
SB) to DISPENSE
SA
5. Press to enable system. LED should be solid
green.
6. Check that heat zones are on and temperatures are
on target, see Status Screen on page 54.
7. Check fluid pressure display and adjust as neces-
sary.
313997A
™
.
SB
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8. Check fluid pressure gauges (GA, GB) to ensure
proper pressure balance. If imbalanced, reduce
pressure of higher component by slightly turning
PRESSURE RELIEF/DISPENSE valve for that com-
ponent toward PRESSURE RELIEF/CIRCULA-
TION , until gauges show balanced pressures.
GA
9. Disengage gun piston safety lock.
10. Perform a test pour into a waste container. Adjust
pressure and temperature to get desired results.
Equipment is ready to dispense.

MD2 Valve

1. If MD2 Valve has a trigger, engage valve trigger
safety lock.
LOCKED
2. Connect air line. Open bleed-type master air line
valve.
GB
In this example, B (Blue)
side pressure is higher,
so use the B (Blue) side
valve to balance pres-
sures.
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Setup
37