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WFS 1545 Operations Manual
ii.
Circulating Pressure
This panel meter (PM-2) displays the pressure at the circulating pump. The sensor is
mounted in a tee just after the pump output. It measures the accumulative back pressure
for all three recirculating filters. It is set to trigger an alarm if the pressure exceeds 70 PSI
and may indicate a need to replace filter cartridges.
iii.
Process Pressure
This panel meter (PM-3) displays the pressure at the process pump. The sensor is
mounted in a tee just after the pump output. It measures the accumulative back pressure
for all process filters. It is set to trigger an alarm if the pressure exceeds 70 PSI and may
indicate a need to replace filter cartridges.
iv.
Water Level Sensors
Two water level sensors mounted in the reservoir monitor the water level; one in the Dirty
Side and one in the Clean Side. These will trigger an alarm if the water level is below their
set point.
v.
Leak Detector
A leak detecting strip is installed around the base of the WFS unit. A leak detecting relay
(LD-1) is mounted inside the control cabinet that monitors the condition of the sensing
strip. If it detects wetness it triggers an alarm. The trip point is adjustable with a small
knob on the relay.
vi.
HMI Touch Screen Display Panel
The HMI is set up with three different pages and these are accessed by selecting one of
the “F” buttons, F1, F3, F5.
•
F1 ALM displays an Alarm Silence button
•
F2 MSG displays what fault is detected
•
F3 OVR Allows for Alarm Override
See Section 4.h ALARMS
h.
ALARMS (Optional)
The system responds in two different ways depending on the nature of the fault that triggered
the alarm. The faults are designated as a Class 1 Alarm or a Class 2 Alarm.
It is necessary to press the “RESET” button to clear any alarms. Alarms will only clear if the fault
no longer exists and the Reset button has been pressed.
i.
Class 1 Alarm
This type of alarm indicates that there is a potentially damaging condition.
••••
Illuminates the beacon
••••
Illuminates the panel mounted alarm indicating light.
••••
Sounds the audible alarm tone
••••
Stops the pumps and chiller
ii.
Class 2 Alarm
