5.0FIELD INSTALLED ACCESSORIES
5.1Pretreatment Shutdown
WARNING: BEFORE OBTAININGACCESS TO THE TERMINALS, ALL SUP- PLY CIRCUITS MUST BE DISCONNECTED.
STEPS
1.Establish that the remote device(s) have dry contacts available to provide the shut- down signal to the RO. Ensure that the normal mode of contact is such that it opens when shutdown is desired.
2.With power removed from control enclosure, open enclosure.
3.Wire from the 24VDC source terminal #514 to the first remote device. Wire all additional devices in series with the first. Wire the last remote device to terminal #1006.
4.On the OIT, press the “Auto/Hand” button located under the RO button. Make sure it is in the Auto position.
With multiple remote devices wired in series, as described above, an open contact from any of the configured devices will activate the External Control Shutdown.
5.2Permeate Flush
Permeate Flush is designed into the
A second way to perform permeate purge is by manually pressing the Permeate Purge but- ton on the OIT screen.
The purge cycle is activated by a shutdown signal received from an external device wired to the RO. Upon activation of the Purge Cycle, the machine remains in run mode and the permeate stream is redirected to the inlet of the machine. The feed water is diluted by an amount proportional to the operating recovery of the machine. The net result, after con-
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