18 CSNX-XHE2
12.2-44.4
M07X40A16-00
7.9 Scroll
compressor
The Scroll compressors have only one rotation direction.
In the event it is reversed, the compressor is not immediately damaged, but increases its noise and jeopardises pumping.
After a few minutes, the compressor blocks due to intervention of the thermal protection.
In this case, disconnect power supply and invert 2 phases on the machine power supply.
Avoid the compressor working for a long time with contrary rotation: more than 2-3 of these anomalous start-ups can damage it.
To ensure the rotation direction is correct, measure the condensation and suction pressure.
The pressures must significantly differ: upon start-up, the suction pressure decreases whereas the condensation one, increases.
7.10 Remote controls
Check that the remote controls (ON-OFF etc) are connected and, if necessary, enabled with the respective parameters as indicated in the
“electrical connections” section.
Check that probes and optional components are connected and enabled with the respective parameters (“electrical connections” section and
following pages).
7.11 Air flow setting
The real unit flow is according to the aeraulic system features.
Before checking, make sure that the system has been completed in all its parts (shunts, dampers, grilles, diffusers etc.).
Check the doors and windows of the serviced room are closed.
Calibration must be carried out with unit all in recirculation.
The unit is in full recirculation during the first 20 minutes from start-up.
Set the flow rate:
par 50 QSetMand (l/sec)
7.12 Air flow management
Standard mode
The air flow supply remains constant in all heat load conditions and operation modes.
ECO mode
The air flow supply remains constant at varied heat loads and is shutdown when setpoint is fulfilled.
Variable airflow
Option
The air flow supply varies depending on the heat load, up to a minimum value compatible with the distribution system and the chosen air
diffusion.
The ventilation remains active even when the setpoint is fulfilled.
Min
1
2
3
1RPLQDO SDU46HW0DQG
$LUIORZ
Nominal
100%
75%
50%
25%
&RPSUHVVRUORDG
0
$LUIORZ
Nominal
Min
100%
75%
50%
25%
&RPSUHVVRUORDG
0
Variable airflow
Eco mode
Standard mode
$LUIORZ
Nominal
100%
75%
50%
25%
&RPSUHVVRUORDG
0