MANOWNROLH
INTRODUCTION
U.S. FILTER
1-3
mode. To prevent membrane degradation, the system will continue to flush
during the "TANK FEED" mode and during "STANDBY" conditions.
F.
Controller (optional)
The controller has the following capabilities:
1.
Low pressure shutdown - when the inlet water pressure falls below 1.38
bar (20 psi). There is a 3 second delay to prevent shutdown during
momentary pressure losses.
2.
High pressure shutdown - to prevent damage to the pump or elements.
3.
High temperature shutdown - to protect the RO membrane from exposure
to damaging temperatures.
4.
Low percent rejection alarm - to warn the operator if the product water
quality has gone out of specification.
5.
Pump startup delay - there is a ten second delay after turning on the unit
before the pump starts.
6.
Automatic flush - the system automatically flushes when the power is
turned on, when the system is placed in "STANDBY", and every hour
during continuous operation ("TANK FEED" mode).
7.
Tank full shutdown - will put the system in "STANDBY" when a float
switch in the RO water storage tank detects it is full (optional).
8.
Interlock - can link the system with a water softener or other pre-treatment
equipment to provide coordinated startup/shutdown/ regeneration cycles.
9.
The inlet solenoid valve is opened automatically when the system is
turned on and closed when the system is put in "STANDBY" or turned off
(the valve delays 5 seconds after the pump stops before closing).
G.
Accessories
The RO system can be used to feed a distribution loop, another piece of
equipment directly, or an accessory reservoir. If an accessory reservoir is used,
a level switch is necessary with the "TANK FEED" feature. This accessory is
connected to the control box by wiring the electrical leads to the level switch
connection after removing the shorting wire. Optional terminals (pretreatment
interlock) have been placed in the control box for shutdown by external signals.
Normal operation will resume automatically when the pretreatment regeneration
is completed.
See the System Installation section of this manual for instructions on electrical
connection of the accessories.
