42
C6.1.11/0718-0619/E
Figure 57
Starting the evacuation function:
The evacuation mode will start when pressing the
ENB
key only if all 3 of the following conditions
are met:
▪
suction pressure probe
P1 value < SPF6
▪
gas cooler (condenser) pressure probe
P2 value < SPF6
▪
flash tank pressure probe
P3 value < SPF6
NOTE: SPF6 = Pressure setpoint to stop evacuation mode (factory-set to 10 bar).
The
ENB
key will remain visible all the time. If the evacuation function is enabled but one of the
above conditions is not met, the following message will be displayed:
▪
"Enabling condition for Evacuation Mode not met, waiting for it"
Subsequently:
1)
The HP and BP valves open directly 100% (the evacuation mode has priority over the valves
override function).
2)
The compressor is switched off (safety timers are ignored).
3)
The fan is switched off, while auxiliary outputs are not influenced (safety timers are ignored).
4)
The alarms are disabled except for the communication alarms.
Stopping the evacuation function:
The evacuation mode will be deactivated when
1)
one of the 3 pressures probes
P1, P2 or P3 > SPF6
or
2)
the
DISB
key is pressed.
When the evacuation function is stopped, the controller returns to its previous status, ie, Off or
regulation.
NOTE: As long as the evacuation function is active, the evacuation label will flash on the main
display
– see Figure 58 below. After pressing the EXIT key, the previous screen will be
displayed again.
Figure 58: Evacuation mode
NOTE: If one of the 3 probes (suction pressure, gas cooler pressure or flash tank pressure)
is not configured or in error, the evacuation mode cannot be executed.
Summary of Contents for Copeland EazyCool OME-4MTL-09X
Page 1: ...Copeland Eazycool CO2 Refrigeration Units Application Guidelines ...
Page 5: ......
Page 68: ...C6 1 11 0718 0619 E 63 ...
