Operation and Maintenance Manual for

SYSTEM INSTALLATION LC Manual 11/02 Rev. 3
Ground the power cable to the ground connection in the motor starter housing box.
Branch circuit conductors supplying the motor shall have an amperage capacity of not
less than 125% of the motor full load current rating as defined by the National Electric
Code.
2.5 WATER REQUIREMENTS
The inlet water supply must be adequate to provide the minimum flow requirement
shown in the Product Description/Equipment Specifications in the Appendix. The inlet
line should be sized to deliver this flow with a recommended pressure of 25 psig at the
RO unit. A shutoff valve within 10 feet of the unit and a cleaning connection should be
provided. A sample valve for checking feed water quality is located upstream of the
prefilter, thus ensuring a true feed water sample.
2.6 PRODUCT LINE
At a minimum the field installed product line should be the same size as skid mounted
product discharge from the RO system. In some cases it may be necessary to increase
to the next pipe size to ensure against excessive pressure loss in the product to storage
tank or point of use piping. A sample valve is located in the product line to facilitate
sampling the quality of the product water. A flowmeter is supplied with the unit to
continuously measure the product flow. The flowmeters supplied are fluid calibrated to
obtain accurate flow measurements. Any replacement flowmeter should also be fluid
calibrated.
2.7 RESERVOIR (OPTIONAL)
RO systems are designed to produce a constant supply of purified water. The
membranes must be maintained in an operational or standby state to retain full
effectiveness. Therefore, a reservoir is usually required, unless the system operates in
direct-feed mode. The reservoir size is a function of space allocation in relation to
system output. Therefore, size selection should be in accordance with this factor.
USFilter can supply reservoirs of any desired capacity as an accessory to the basic RO
system.
2.8 ACCESSORY SENSORS (PRETREATMENT INTERLOCK, CHEMICAL FEED AND
TANK LEVEL(S))
Provisions have been made for shutdown by accessory sensors, provided such sensors
are equivalent to a single-pole, single-throw switch. When a shutdown condition exists,
the RO system will resume normal operation automatically when the alarm condition has
been corrected or no longer exists. Please refer to the steps that follow for installation
instructions and locations (please refer to the RO Controller manual in the Appendix for
further instruction).
A. Open the controller enclosure door to expose the terminal connections.
B. Dry contacts for the PRETREATMENT INTERLOCK should be connected
between terminals 19 and 20 of the terminal strip. The CHEMICAL FEED
SYSTEM OUTPUT accessory is connected between terminals 29 and 30 of the
terminal strip. The HIGH TANK level switch input is connected between terminals
17 and 18. The MID TANK level switch input sensor is connected between
terminals 15 and 16.
2-2 USFilter