11
M898-3_GB_letter
NEB 6500 and NEB 6500 R
Pic. 16 - The electronic board
6.1.1 Dip switches
The electronic board of Pic. 16 regulates the capacity of the
dehumidifier with dip-switches according with Tab. 5.
Tab. 5 - Dip switches
NOTE: the values are indicative. By default the dip switch-
es are set for maximum capacity.
6.2 Adjusting the humidification capacity
Adjustment can be done during the installation phase, or
later if, for example, machine operation is to be adapted to
the variations of the environmental conditions in the envi-
ronment where it has been installed. In this case, proceed as
follows:
»
Perform the stopping procedure as in par. “5.3 Stop-
ping”.
»
Remove the air filter by unscrewing the three screws that
hold it.
»
Remove the electrical connection box by releasing the
spring.
»
Open the electric connection box and adjust the posi-
tion of the dip switches according to its needs.
»
Close the electric connection box and place it back in its
position with the spring.
»
Close the machine and make the checks as described in
par. “4.5 Final operations”.
»
Start the humidifier again.
6.3 The washing/reset cycle
The electronic card of the NEB 6500 is programmed to
carry out a washing/reset cycle each time:
»
The machine is started with the main switch.
»
The humidistat closes the H-H contacts because the
necessary %R.H. conditions have been reached.
The scope of this cycle is to prevent water depositing in the
machine when it is not in operation, in this way preventing
the proliferation of bacteria.
The cycle has a fixed duration, and consists in:
»
Exclusion of the motor, and a 40-second waiting period.
This waiting period gives the motor (and thus the fan/disk
unit) the opportunity to stop completely, and give the water
in the machine time to collect at the bottom of the basin.
»
Enabling the water loading solenoid valve.
The water enters the basin until the level sensor trips.
»
Wait for the level sensor status change.
The level sensor contact status changes when the water level
rises inside the basin.
»
Keeping the water loading solenoid valve enabled for 10
seconds after the level sensor has tripped.
In this way the water level in the basin exceeds that of
normal operation and the siphon is primed: this will drain
all the water out of the basin.
»
Disabling the loading solenoid valve and waiting for a
fixed time.
This time period is needed to make sure that all the water
in the basin is drained off.
»
End of the reset cycle.
At the end of the reset cycle the machine waits for the hu-
midistat H-H contact to be closed or, if it is already closed,
starts the machine and begins to humidify.
