Edwards nEXT200200 - Configuration and Operation; Pump Configuration via Serial Commands

▪ the volume of the vacuum system is less than 10 litres (when using a TAV6 vent
v
alve).
Refer to Table: Vent restrictor orice diameter (with atmospheric pressure at the inlet of
the vent valve) on page 54 for an applicable orice size to be installed to the vent valve
for the given vacuum system volumes to limit the rate of increase in pressure. Refer to
Figure: Maximum allowed rate of increase in pressure during venng: pressure against
me (pump inially at full speed) on page 23.
Note:
If a ven
t restrictor is used, the me necessary to vent the vacuum system can be long.
Use a vent valve without a vent restrictor to decrease the me. Before you open the vent
valve, wait unl the speed of the pump decreases to 50% of the full rotaonal speed.
4.9.3 Vent valve control
You can use controller electronics to control the TAV5 solenoid valve or
TAV6 solenoid valve.
To control the solenoid valve:
1. Install the electrical connector supplied with the pump at the lead of the TAV5
solenoid valve or TAV6 solenoid valve.
2. Make sure that the cable cores and screen are wired correctly. Follow the electrical
connecon instrucons given in the Accessories Manual (supplied with the
TAV valve) and refer to Figure: Controller connector showing pin numbers on page
30.
3. Connect the connector into the socket at the side of the controller. Refer to Figure:
Con
troller status informaon on page 42.
Refer to Table: Vent opons on page 53 for details on dierent vent opons.
Table 16 Vent opons
Opon number
Descripon of the vent funcon
0
Vent valve opens fully below 50% full rotaonal speed for the
stop command or fail. This is the factory default seng.
1
Controlled v
enng from 100% to 50% full rotaonal speed, vent
valve opens fully below 50% for the stop command or fail.
2
Vent valve fully opens immediately if the stop command is
r
eceived, vent valve opens fully below 50% full rotaonal speed
if fail.
3
Vent valve fully opens immediately if stop command is
r
eceived, controlled venng from 100% to 50% full rotaonal
speed if fail then vent valve opens fully below 50 %.
4
Vent valve fully opens immediately if fail, vent valve opens fully
below 50% full rotaonal speed if stop.
5
Vent valve fully opens immediately if Fail, controlled venng
from 100% to 50% full rotaonal speed if Stop command
received then vent valve opens fully below 50%.
Page 53
B85200880_D - Ins
tallaon