Graco Therm-O-Flow Plus, Instructions Manual

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Dual Ram Cross-Over Control Function
Setup of X-Over
There are 4 steps that must be completed before the
X-OVER is properly setup within the pendant.
1. Connect Devices and record their zone location.
2. Ensure all zones are configured for ACTIVE or
UNUSED (ZONE SETUP/PID selection).
3. Dedicate zones to UNLOADER A, UNLOADER B
or ALWAYS ON zones.
4. Ensure full drums are available when starting the
X-OVER functions.
Connect all hot melt devices to their appropriate con-
nections of each control box DH connector. Record
the device type and zone location for ease of reference
when setting the pendant parameters. Remember,
UNLOADER B has zone address higher than UN-
LOADER A and which are not reflected on the labeling
of the control panel.
ATTENTION: Heated Header Assemblies should
never be connected to zone #8 of an 8 Zone control
panel. This zone is only rated for a maximum wattage
of 250W. The heated header assembly requires 500W
for operation. Therefore, the heated header assem-
blies should always be connected on zones 3, 4, 5 or 6
of any Therm-O-Flow Plus control assembly. (The 8
Zone control panel has the only restricted zones,
750W for Zone #7 and 250W for Zone #8). Reference
page 10, Heat Control Zone Selection.
When first setting up the pendant for x-over operation,
ensure all zones are properly setup for ACTIVE or
UNUSED zones within the ZONE SETUP/PID option.
(See ZONE SETUP/ PID TYPE section.)
The pendant must know which zones are DEDICATED
zones and which zones are ALWAYS ON. DEDI-
CATED zones are zones that are controlled off/on with
the unloader. For example, the pump and plate of
each unloader is dedicated to the unloader. When the
unloader is not the active drum, the pump and plate
heat zones are not left on. ALWAYS ON zones are
heat zones that are ON regardless of which unloader
is the active, pressurized drum. This usually is head-
ers, manifolds, and hoses and guns connected on the
outbound side of these components. These heat
zones are ALWAYS ON and are not turned off if a
drum goes empty.