About the product
Many vehicles for transportation of goods or
recreation, such as trucks, caravans, boats, cars,
etc. are often equipped with cooling appliances
and air conditioners. The compressors for
such mobile applications must be designed to
operate from a low voltage DC power supply.
These compressors must also be compact in
their dimensions, highly reliable and yield high
performances.
GLT80TDC is an answer to the needs of users
requiring comfort and reliability in their
travelling, either on holidays, at work or in any
other circumstance where a DC powered air
conditioner is utilised. The GLT80TDC is designed
to operate silently, efficiently and reliably even
up to angles of tilt of 20º, and works with the
environmentally friendly refrigerant R134a. Its
design is based on the “L” series, which has been
successfully present in the market since 1964,
and has had sales of more than 200 million units.
GLT80TDC is designed for capillary tube
expansion and can be powered at 24 and 42V
DC, and also at 12V with some restriction. Each
unit is supplied with a dedicated electronic driver
(FDC3), which features all the protections for
both the battery and the driver itself, including
the compressor motor. The driver automatically
adjusts itself to the voltage of the power supply.
Evaporating temperature range: -25ºC to +10ºC.
Condensing temperature range: up to 65ºC. Pull-
down peak: 70ºC.
Ambient temperature range: -10 to 55ºC (65ºC at
starting).
In case of ambient temperature lower than 0ºC,
an oil heater will be needed.
The electronic control unit FDC3 is supplied with
the exclusive Serial Port Interface (SPI), featuring
a RJ45 telephone type connector. SPI allows the
electronic driver to be connected to a computer
for programming purposes using the FxC
programming package (hardware and software,
provided by the manufacturer upon request),
and allows the communication with an Electronic
Integral Manager of the appliance (EIM), and
making the compressor work in slave mode.
FDC3 electronic driver includes Smart Speed® as
programming option, which is a plug-in system
for automatically self adapting compressor
speed to current thermal load in refrigerating
appliances.
Smart Speed® reduces number of thermostat
cycles by minimizing compressor speed,
enlarging on-time at every thermostat cycle,
so that start/stop energy loses are substantially
reduced. Lowest speed yields also highest
evaporating temperature, and so highest C.O.P.
and lowest energy consumption. Pull-down is
done at maximum programmed speed, so pull-
down time is very short with respect to fixed
speed systems. No design parameters neither of
the compressor nor the appliance are required to
be programmed, so Smart Speed® can be easily
used in all appliances with no design efforts.
FDC3 electronic driver includes Sleep and Sleep
Energy Saving as programming option, which are
plug-in systems specially conceived for mobile
air conditioners avoiding any other electronic
device. Sleep and Sleep Energy Saving make the
air conditioner work for four hours since start-
up. Sleep Energy Saving makes the compressor
run at maximum programmed speed during
the first hour, when highest cooling capacity is
needed, and lowers progressively the compressor
speed up to minimum velocity three hours
later. Maximum comfort and minimum energy
consumption are thus achieved.
GLT80TDC starting capability is as low as 10 V
under any balanced pressure; it also admits a
certain remaining differential pressure when
thermostat off-time is abnormally short. For
improving even more the starting capability,
FDC3 electronic driver can be programmed with
a 3 minutes minimum thermostat off-time. The
delay is a programming option which can be
easily enabled by means of the FxC programming
kit.
FDC3 also includes a 1 second filter at the
thermostat input to prevent the appliance from
wrong operation due to typical micro switching
produced by vibrations in those appliances that
fit tilt switches at the thermostat circuit. So,
analogical filtering is not needed.
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FRCC.PC.041.A1.02
