ITM Italia EURODRY EFT Serie Manual De Instrucciones página 22

5.
Operation/use and other instructions
This Chapter illustrates the procedures for operating the various models of the EFT dehumidifier series; therefore,
find out which model you have before reading the instructions.
5.1 Starting and stopping the machine
In Figures 4, 5, 6 and 7 you can see that all the models of the EFT series have a main switch (1) and a humidistat.
After installing the machine as shown in Chapter 4, you can select the various operation procedures illustrated
below. Nonetheless, after studying the configuration corresponding to your model, take the following steps to start
the machine:
Fig. 4 Humidistat
Note: On the EFT400 basic model (Fig. 5) there is no light to indicate the machine is ON or that the compressor is ON.
Nonetheless the humidistat determines whether or not the operation time is being counted, i.e. the cycle mode.
The machines can be stopped by turning off the main switch or the humidistat switch. Bear in mind that if you turn it
off by the humidistat switch, all the internal parts downstream of the main switch continue to have voltage.
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When you turn off the machine, wait about two minutes before turning it back on.
5.2 Defrosting
All the models have a defrosting phase after a certain amount of operation time to facilitate the collection of
condensate. The defrost time and mode depend on the model. Here is an explanation of the differences
5.2.1 EFT 400 BASIC
After a certain operation time, the electronic card onboard the machine temporarily stops the compressor while the
fan continues to suction ambient air for long enough to melt any ice that may have formed on the coolant gas
evaporator. This mode of defrosting by air is not effective for ambient temperatures below 6°C. The control panel of
this model gives no indication that this phase is occurring but the phase is controlled by the card logic.
5.2.2 EFT 550 and 800 BASIC
After a certain operation time, the electronic card onboard the machine temporarily stops the compressor while the
fan continues to suction ambient air for long enough to melt any ice that may have formed on the coolant gas
evaporator. The SMART DEFROSTING device of the electronic card establishes the optimal duration of the
defrosting phase. This defrosting by air is not effective for ambient temperatures lower than 6°C. On these models
warning light 5 (see fig. 6) turns off temporarily during the defrosting phase.
5.2.3 EFT PLUS (all models)
After a certain operation time, the electronic card onboard the machine temporarily stops the fan and the opens the
electric condenser by-pass valve while the compressor continues to circulate hot gas long enough to melt any ice
that may have formed on the coolant gas evaporator. The SMART DEFROSTING device of the electronic card
establishes the optimal duration of the defrosting phase. This defrosting mode makes it possible to operate at
ambient temperatures of up to 0.5°C. On these models you know the defrosting phase has started when warning
light 9 comes on (fig.7).
Turn main switch 1 to the ON position (Figs. 5, 6 and 7) and make sure the
voltage warning light 3 comes on;
Select the relative humidity you wish to have by turning the humidistat knob
(Figures 3 and 4); if the ambient humidity is lower than the humidity set on
the humidistat, the dehumidifier does not start.
By using the humidistat you can select continuous operation by turning the knob
to the CONT position. (Fig. 4). If you are using a remote humidistat, always turn
the knob to the OFF position. This way the control is delegated to the remote
switch and the same starting procedures apply. When the dehumidifying cycle
starts (only if the humidistat is active), the active cycle warning light 6 comes on.
After a standard defrosting time, different for each model, the gas compressor
starts and warning light 5 comes on. Warning light 6 comes on to indicate that
the hour counter is keep track of the machine operation time.
GB 9