Installation
4
311513D
Installation
Overview
Therm-O-Flow Expansion Zone Controls are typically
used to add more heat zones to an existing
Therm-O-Flow system. As an example, a user may have
a Therm-O-Flow system with six heat zones (pump,
plate, two hose zones, and two gun/access zones).
There is a need to add more hoses to the system
because of a long fluid run from the unloader to the dis-
pense point. An expansion 4-zone control can be added
to the system to heat additional zones beyond the six of
the system unloader. When properly connected with
appropriate communication cables, the Therm-O-Flow
system can recognize the main system unloader as well
as the expansion zones.
For operation and startup of a Therm-O-Flow unloader
system, refer to your Therm-O-Flow manual (see front
cover).
The Therm-O-Flow Expansion Controls are intended to
heat combinations of hot melt hoses and guns or acces-
sory devices. Accessory devices include guns, compen-
sators, regulators, manifolds, and headers. See F
IG
. 1
for a typical installation.
Fluid Hoses
The Therm-O-Flow Expansion Zone Controls were
designed for use with Graco single-circuit material
hoses that are rated at a maximum of 1250 watts, and
single circuit devices rated at a maximum of 500 watts.
The 255372 4-zone control can operate a maximum of
two hoses and two gun/auxiliary zones, or four gun/aux-
iliary zones when no hose zones are used.
See Accessories, page 15, for zone connection instruc-
tions.
When installing a system, make sure:
•
all air and fluid hoses are properly sized for your
system.
•
to use only electrically conductive air and fluid
hoses.
Only use hoses that have a maximum wattage less
than or equal to 1250 watts. Using hoses with
higher maximum wattage could create a failure in
the electrical circuit.