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Installation
®
THERM-O-FLOW
T7 Hot Melt System is used for melt-
ing and pumping hot melt thermoplastic adhesives. The
system consists of the melt unit, up to two heated supply
hoses, and applicator. System operation is further
enhanced by the use of pattern controllers, timers, foot
switches, or other such devices. All temperatures in the
hot melt system are controlled by closed loop electron-
ics using thermistor-based sensors.
Melt unit
Includes heated melt tank with a motor-driven, positive
displacement gear pump. Front panel controls tempera-
tures and settings. Fluid pressure is supplied by the reg-
ulator that controls flow through a bypass mechanism.
F
. 1: Tank Dispensing Material
IG
Pump and Motor
To prevent damage to the pump and/or motor with mate-
rial that is too viscous or solid, operation of the pump
motor is inhibited until the tank reaches approximately
90% of the selected temperature. The pump and motor
are protected by a fuse that blows if a stall or overload
condition occurs. See Repair starting on page 23, for
replacement instructions.
Auxiliary Input Connection
One auxiliary connection is available for each
hose/applicator employed in the system. Foot switches,
timers, and air pattern controllers connect to the auxil-
iary input.
4
On/Off Switch and Circuit Breaker
The on/off switch and circuit breaker (R) is a manual cir-
cuit breaker and also a magnetic breaker. See F
page 10.The magnetic breaker opens the circuit when
the current exceeds 20 amps (at 115 VAC or 230 VAC)
or when over-temperature conditions are sensed at the
melt tank. See Troubleshooting, page 20.
Installation
. 4,
IG
309832D
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