SYSTEM INSTALLATION
MANOWNROSM
US Filter
8
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 on the System Specifications sheet in the Appendix. The inlet line should be
sized to deliver this flow with a minimum pressure of 0.69 bar (10 psig) at the RO unit.
A shutoff valve within 10 feet of the unit and a cleaning connection should be provided.
A sample valve to check feedwater quality is also recommended.
2.6
PERMEATE LINE
The permeate line should have sufficient internal diameter to minimize line pressure
drop. It is recommended that a small sample valve be placed in the product line to
facilitate sampling of the permeate water quality. A flow meter is supplied with the unit
to continuously measure the permeate flow rate. The flow meters supplied are fluid
calibrated to obtain accurate flow measurements. Any replacement flow meter should
also be fluid calibrated.
2.7
ACCESSORY SENSORS (PRETREATMENT INTERLOCK AND TANK LEVEL)
Provisions have been made for shutdown by accessory sensors, provided such sensors
are equivalent to a single pole single throw switch. The shutdown is such that normal
operation will resume automatically when the failure is removed.
A.
Remove the lower panel from the control box and the attached integrated
controller circuit to expose the terminal connections.
B.
See the Reverse Osmosis Controller, Operating Instructions in the Appendix to
connect PRETREATMENT INTERLOCK, HIGH TANK LEVEL and MID TANK
LEVEL sensors.
NOTE:
If only a high tank level switch is used, a switch should be selected with a built
in “dead band” in order to prevent the RO pump from cycling. Using a switch
without a “dead band” could cause the motor starter to fail and can contribute
to low product water quality.
C.
These terminals are normally closed. An open circuit is necessary to shut down
the system.
D.
To connect the accessory, remove the shorting wire and connect a single pole
single throw normally closed sensor between the respective terminals. It is
recommended that shielded cable, properly grounded, be used to avoid radio
signal interference with these functions.
2.8
SETTING THE FLUSH CYCLE TIME (OPTIONAL)
See the see the Reverse Osmosis Controller, Operating Instructions in the Appendix.
