44
Pump Running Hours Button
Press and hold the Pump Running Hours Button to
display the amount of time the pump has run. The
running hours show in the process display window.
Display of running hours is in units of hundreds so a
display value of 10 would mean 1,000 hours. The
running hours will show while holding the button.
Control is not disturbed while displaying the pump
running hours.
Pump Test Button
With the chiller stopped, pressing this button briefly
engages the pump to test its operation. The pump
will not run if there are any active alarms. The pump
shuts down by either pressing the Stop button or
pressing the Pump Test button a second time. The
pump will shut down after one minute of operation.
Display/Program Button
The Display/Program button will change the
temperature displayed in the Process screen from
Supply to Return. When the display is set to supply
temperature, there will be an orange indicating light
in the lower right corner of the Process temperature
display. When the display is set to return
temperature, there will be no orange indicating light
in the lower right corner of the Process temperature
display. To toggle the process temperature display
from supply to return temperature, press and release
the Display/Program button. The display will return
to the default Supply temperature automatically
after 5 seconds without a button press.
In addition to switching between the supply and
return process temperature displays, the
Display/Program button will initiate and navigate
through the program menu. See the Program Menu
section for more detail.
Up Button
The Up Arrow button raises the set point
temperature. Pressing the Up Arrow and releasing it
increases the set point temperature by one degree.
Pressing the Up Arrow button and holding it
increases the set point temperature until reaching
the maximum allowable set point temperature. In
addition to adjusting the set point temperature, the
Up Arrow button adjusts various alarms and set
point values when the unit is the programming
mode.
Down Button
The Down Arrow button decreases the set point
temperature. Pressing the Down Arrow and releasing
it decreases the set point temperature by one
degree. Pressing the Down Arrow button and
holding it decreases the set point temperature until
reaching the minimum allowable set point
temperature. In addition to adjusting the set point
temperature, the Down Arrow button adjusts various
alarms and set point values when the unit is in the
programming mode.
Control Power On LED
The Control Power light is on and green when the
Control Power Switch is in the ON position and
24VDC control voltage is present.
Autostart Signal LED
The Autostart Signal light is on and yellow when
enabled and no Autostart signal is present. It is on
and green when enabled and the signal is present.
This feature allows the unit to be turned on and off
by a remote contact closure. Switching the contacts
from open to close simulates pressing the Start
button on the control panel. Switching the contacts
from closed to open simulates pressing the Stop
button. From the factory, the Autostart feature is
disabled. See the Program Menu section for
instructions on how to enable or disable the
Autostart feature.
WARNING:
Do not introduce any external
voltage to the Autostart contacts, as this will
result in damage to the microprocessor.
Содержание NQ Series
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