GE Z-14400 - Manual (Page 17)

Z Series RO System by GE Osmonics
RO Interlock:
The RO Interlock circuit, when activated, will not allow the RO unit to operate (run). An
electric signal is sent from the RO unit control box (panel) to a normally open micro
switch on the device. These devices are typically part of the pretreatment system. When
the micro switch is closed, the signal returns to the RO unit control box activating the RO
interlock circuit thus disabling RO operation. When the contact is reopened and the
signal no longer is returning to the RO unit control box, the RO interlock circuit is
deactivated and the RO unit will revert to its operational status prior to the lockout. The
devices are connected in series so that if any of the micro switches close, it would
activate the RO interlock circuit and shut down the operation of the RO.
The interlock circuit is also connected to the Temperature Alarm Monitor and will
activate with an alarm condition.
Alarm Mute:
An Alarm Mute switch allows the operator to immediately mute the audible alarm and
address an alarm condition within several minutes before re-sounding occurs. Pressing
the Alarm Mute switch will not mute the audible disinfect alarm produced during
disinfection with a Disinfect Alarm Monitor.
Disinfect key switch:
The Disinfect key switch is used to start the unit for the introduction of
disinfectant/cleaner into the unit. The key switch locks out the inlet solenoid and low-
pressure switch.
CAUTION:
Ensure the RO Unit is prepared for disinfection operations prior to engaging the Disinfect
key switch.
Temperature Alarm Monitor:
The Temperature Alarm Monitor monitors feed water temperature and will shut down the
RO unit if the reading is greater than the alarm set point. The alarm set point is factory
set at 90
o F and can be adjusted by the user. If high feed water temperature occurs, visual
alarms will illuminate and activate the interlock circuit shutting down the RO unit. The
RO unit will resume operation when the temperature alarm condition is removed.
WARNING:
The monitor is equipped with an override switch to bypass the alarm condition and allow
the RO unit to operate. The override switch is provided for emergency operation only.
When the monitor is alarming and has been overridden, the monitor provides the visual
indication that it is in the override position and is in the alarm mode. When the
temperature returns to below the 90
°F limit, the RO unit will revert to its operational
status prior to the alarm and RO lockout. All equipment should be checked for correct
operation prior to resuming normal operation.
1238339b – 16Oct03 1 - 11 General Information