FarragTech CARD G, Руководство по эксплуатации

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HOW IT WORKS
CARD G / FIT
10
V 6.15 E / April 2010
T
he compact midget dryers of the CARD G (Compressed Air Resin Drier Giant) series consist of
an insulated stainless steel drying hopper surrounded by a stainless steel housing. The
CARD G FIT unit is able to control a Venturi- or Vacuum loader for loading.
The main electrical power is to be connected to the CARD G FIT unit through the included power
cord which is to be plugged in to the customers own electrical supply (1N~230V/50Hz or
2~220V/60Hz). Compressed air is to be supplied through the hose connector (1.1) on the back of
the unit.
The CARD G FIT is switched on through the main switch on the back. The display of the FIT-
controller (5.2) will illuminate when power is available.
As soon as the drying process is started, the solenoid valve (1.2) releases dry compressed air
(with a maximum pressure dew point of 5°C [41°F] at 7bars [102PSI] and maximum oil content of
3mg/m³ [3ppm]) to flow into the dryer. The pressure of the air is reduced by the pressure
regulator (1.4). The air passes at almost atmospheric pressure through the process heater (1.7)
and is warmed up to the required drying temperature. The temperature sensor (1.8) reports the
actual process air temperature to the FIT-Controller to maintain the desired temperature at high
accuracy. The hot dry air gets into the hopper through the air distributer (1.10), dehumidifies the
resin on its way to the top and exhausts through the air outlet filter (6.5) to the ambient.
A preset pressure switch (1.3) will send an alarm if compressed air is missed or the air pressure
is too low. A temperature limiter (1.9) alarms in case of excess temperature in the process
heater. In both cases, the FIT shuts down the process heater to protect of thermal overload.
The FIT-controller is also capable to control an optional material loader to load resin into the
dryer. A one- or two-components venturi type (4.7) or self contained vacuum loader can be used
.
Electrical power for a vacuum loading unit must be supplied from an external source. Standard
provisions to connect control signals for a proximity switch or flap (3.2) as well as for a solenoid
valve or motor blower (3.3) and a compressed air coupling (1.13) are provided on the back of the
dryer housing.
The CARD G FIT series is equipped with a strobe light (5.3) and an optional dry contact (4.6) for
external alarm devices to alarm the operator in case of a malfunction.
A sight glass (6.7) in the upper part of the unit indicates the resin level in the drying hopper.
CARD G FIT units are equipped with a SUB-D-interface (3.10) to connect to the production
machine, thus allowing the production machine to control the dryer and to collect data and fault
messages of the drying process.
The CARD G FIT can be integrated to a local or public network through an optional Ethernet-jack
(4.6) on the back of the unit. This offers the possibility to monitor and record process data and to
control the drying process over the World Wide Web.