Edwards XDS46i

the process only aer any remaining ammable gases or vapours have been
purged from the pump and exhaust line.
▪ If liquids that produce ammable vapours could be present in the pump foreline
then the inert gas purge to the pump should be le on all the me this liquid is
present. Flammable liquids could be present in the foreline as a result of
condensaon or may be carried over from the process.
▪ When calculang the ow rate of inert gas required for diluon, consider the
maximum ow rate for the ammable gases or vapours that could occur. For
example, if a mass ow controller is being used to supply ammable gases to the
process, assume that a ow rate for ammable gases that could arise if the mass
ow controller is fully open. The inert gas purge ow rate should be connually
measured and if the ow rate falls below that required, then the ow of ammable
gases or vapours to the pump must be stopped.
The Vacuum Pump and Vacuum System Safety publicaon P40040100 is available from
us or the supplier.
5.6 Remote operaon using 15-way D connector
It is possible to operate the pump remotely using the 15‑way D type connector ed on
the panel at the side of the pump.
The 15‑way D connector is insulated to ensure that it remains protected in the event of a
single fault condion.
The controls available are as follows:
▪
Run/Standby
▪ Run ‑ (Runs pump at standard speed 100%).
▪ Standby ‑ (Pump is not running but is ready and awaing a remote signal for
operaon).
▪
Idle ‑ (Runs pump at 67% speed).
▪ Boost ‑ (Runs pump at 116%) intermient use only (not for connuous operaon).
See note below for further informaon on this mode of operaon.
▪ OK Signal
Figure: Logic interface schemac on page 24 shows which connecons to make to
enable these funcons.
The Run/Standby switch (Figure: General view on page 9, item 9) should be in the
Standby posion for remote operaon. The idle and boost modes are only available with
remote operaon.
To completely remove electrical power from the pump, the plug should be removed
from the electrical connector (Figure: General view on page 9, item 7).
Note:
Boost operaon is not recommended for the pump as a permanent operaon mode, as
increased bearing loads will reduce the life of the pump bearings. Please consult us if the
boost mode is intended to be used as the limits of operaon are applicaon dependent.
Page 23
A73101880_F - Operaon