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5.0 FIELD INSTALLED ACCESSORIES
5.1 Pretreatment Shutdown
E-CE Series RO machines are equipped with Pretreatment Shutdown control capability.
Pretreatment Shutdown is the ON/OFF control of the RO via a signal from a remote
device. External Control can be used when Permeate Flush is not desired prior to RO
shutdown (Permeate Flush, Section 5.2). The Permeate Shutdown control could be
remote ON/OFF, level control, pretreatment lockout, and/or post-treatment lockout, etc.
Utilization of this feature requires a customer-wired control loop, wired to factory-sup-
plied terminals. This procedure is as follows:
W
ARNING: 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.
5.2 Permeate Flush
Permeate Flush is designed into the E-CE-RO machines to provide an integral means of
reducing the fouling potential of the stagnant concentrate in the RO during extended peri-
ods after automatic shutdown. The E-CE-RO machines are equipped with the necessary
plumbing and electrical controls to provide a 10-minute pure water (permeate) flush.
Activation of the purge cycle by remote device requires a customer-wired control loop to
factory supplied terminals. This procedure is provided later.
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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