Relieving System Pressure; Locking Out External Communications - Nordson ProBlue P4 Customer Product Manual

5-2
Maintenance

Relieving System Pressure

Melter control switch (on/off)

Locking Out External Communications

Part 1024496_06
Before disconnecting any hydraulic fitting or opening any pressurized port,
always complete the following procedure to safely relieve hydraulic pressure
that may be trapped inside the melter, hoses, and guns.
To relieve system pressure
1. Switch the melter off.
See Figure 5‐1.
2. Lower the drain chute and place a suitable waste container under the
drain port.
3. Using a flat‐tip screwdriver, slowly turn the drain valve counterclockwise
three turns.
4. Turn the drain valve clockwise until it stops (valve closed), and then wipe
off and raise the drain chute.
5. Trigger the guns until hot melt no longer flows from the guns.
WARNING! Disable external inputs and fieldbus communcations (if installed)
with the melter before performing maintenance. Failure to disable external
inputs or fieldbus communications with the melter can result in personal
injury due to unexpected operation of the melter while performing
maintenance.
To lockout external communications with the melter
S
Set the control option for operating parameter 14 to 1 (Enabled).
Refer to Section 3, Setting Up the Melter, for information about changing
operating parameters.
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