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-display on the key-pad of internal humidity value;
-control of dehumidification function;
-control of humidification function.
Outside the shelter, humidity probe measures external humidity in order to enable free-cooling
function according also to the value of this parameter.
Range of measurement is RH between 15% and 90%.
The probe is supplied loose, to be mounted on site. It is provided with a signal cable and power
supply cable 1.5m long and with the necessary minifit plug to match connector C3 for inputs to
C1010 located on the unit. It has to be installed on the shelter wall outside the unit, using the clip
included in the kit. Then, it has to be connected to connector C3 on the unit via its cable and the
connector provided in the kit (or via the corresponding connector of signal cable SIGC3, if this
option is ordered).
If units are supplied with parameters of C1010 not configured for RHC, the electronic controller has
to be configured by the installer on site, according to the instructions leaflet.
19.18 VOLTAGE CONTROL DEVICE - VCC
It is a relay with double intervention threshold: one for low voltage and one for high voltage. VCC
interrupts power supply if it is not in rated tolerance terms, in order to prevent faults due to voltage
variations not compatible with electric components inside the unit.
19.19 CONTROL OF PHASE CONNECTION FOR UNITS WITH 3-PHASE SCROLL
COMPRESSORS - PSCR
Relay for control of right sequencing of phases during connection of main power supply. Only for 3-
phase scroll compressors, PSCR protects them from turning in the wrong direction. If not ordered,
please refer to the instruction on Chapter 13 for correct connection of this kind of compressors.
19.20 HARDWARE KEY FOR SOFTWARE UP/DOWNLOAD - HKEY
It is useful to update software and/or file with configuration of parameters loaded on the electronic
controller C1010. Software and/or parameters configuration can be both downloaded from HKEY
to C1010 or uploaded from C1010 on HKEY, selecting the corresponding options on key-pad of
C1010. This is useful to transfer software and configuration from an already updated unit to other
units which haven’t been updated yet. HKEY has to be inserted into SPI socket on C1010 board.
19.21 ADAPTER FOR SOFTWARE UP/DOWNLOAD WITH LAPTOP - AST
This option can realise the same function as the HKEY option, but using a laptop as memory
support for the files. It consist in a serial adapter for RS232 port to be inserted into PRG socket on
C1010 board.
19.22 SEQUENCING CABLE 2m - SEQC2
These cables are used to connect the units to each other in a sequencing net, using the sequencing
socket on the back plate of the unit. If N is the number of units to be put in sequencing, N-1 is the
number of required cables for sequencing net. This cable is not provided as standard with the units,
but only as an option with standard length of 2m and necessary connectors (see drawing on the
next page). If longer cables are needed, please consider that maximum length permitted is 8m.
If maximum length is exceeded, a screened cable is necessary and this cable has to be routed in
an earthed metallic tube. In this tube there must be no other cables than signal cables.
