VALCO MELTON D-90, Руководство пользователя

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3-5 ValcoMelton
Section 3 - Basic Features MM125 - D-90 Hot Melt Unit
Filter
The filter reduces the chance of pressurized adhesive becoming
contaminated. Clean or replace the filter periodically (see Maintenance
section).
Shut-Off Valve
This valve shuts off adhesive to the manifold for maintenance/parts
replacement. Turn the valve 1/4 turn CW to close; CCW to open (see Figure 3-
3).
Hose Receptacle
The hose receptacle receives the hose electrical connections.
Receptacles shown are Harting latching connectors, but Nordson-compatible
receptacles are also available.
Level Sensor
The optional level sensors available are high-temperature Rechner
capacitive sensors. These level sensors accurately detect adhesive level,
and send a signal to the drum unloader (if applicable) in order to fill the unit
automatically.
Side Panel
The side panel allows access to the grid, collector and manifold heaters,
RTDs and thermostats. It also allows access to the level sensors (if
applicable), gear pump and motor.
There are two pressure relief valves on the manifold. The first valve is an
adjustable pressure relief valve that can be manually adjusted to set the
adhesive operating pressure. The factory setting is 750 psi. The second
valve is a fixed pressure relief valve that limits the maximum adhesive
operating pressure. The factory setting is 1000 psi. Some units may have the
valves switched.
The physical location of these pressure
relief valves may be reversed in some
units.
WARNING! WARNING!
WARNING! WARNING! WARNING! Do not adjust the fixed pressure relief valve. This
protects the system from excessive pressure buildup.
OTHERWISE, SERIOUS PERSONAL INJURY OR
EQUIPMENT DAMAGE COULD OCCUR.
Pressure Relief
Valves
Pump
Transfers the molten material from the drum to hoses or guns as required by
the application.
Motor
AC gear motor that is controlled by a variable frequency drive.
Hose Support
The hose support is used to prevent the fill hose from the drum unloader from
bending excessively. See
Section 2 – Safety and Use for more details
concerning hose safety.