NuAire LabGard NU-813-300, Operation & Maintenance Manual

Page: 34 / 52

OM0236 Page 34 of 52
February/2019
7.5.3.3 Low Flow Calibration (See Section 8.2.2 to Activate the Low Flow Function)
The Nite Care mode is defaulted to operate the blower at approximately 600 rpm or a 14% duty cycle.
However, if desired the Nite Care blower speed can be adjusted higher or lower by performing the
following:
• Press and hold key, then press hidden – blower - ↓ ke ys sequentially.
LED indicator above blower (green) key will blink fast.
Press ↑ or ↓ keys to adjust blower speed.
•
LED segments will indicate Nite Care blower speed percentage and active blower speed adjustment
o
Left end red LED indicates active blower speed adjust
The red LED will blink as soon as any adjustments are made and will continue to blink as the motor
rpm settles. Once the red LED stops blinking, the motor will run steady state at the new percentage.
Note: The red LED must be non-blinking to save or exit
o Green LED’s indicate percentage on of scale (0-100%)
o Yellow LED’s indicate minimum (left/maximum (right) blower speed has been achieved
Note: At any time during the process
• Press hidden key to accept Low Flow blower speed calibration point
• Press key to abort and exit
7.5.3.4 PresurFlow Alarm Verification
The PresurFlow Alarm setpoints are based on the calibration setpoint. Once the calibration setpoint is
entered, the Alarm setpoint offset pressure values will align from the calibration pressure value. The high
or low alarm setpoint can be verified by measuring inflow volume/velocity while adjusting blower up or
down within the Alarm Verification menu.
•
Press and hold key, then press ↑ ↓ ↑ sequentially r eleasing the key after the 3 key
sequence.
• Note: If blower was off while entering into the Alarm Verification Menu, the low alarm limit will
immediately activate. Turn on blower; once airflow is above the low alarm limit, the alarm will turn
off.
•
LED segments will indicate blower speed percentage.
• Press ↑ or ↓ key to raise or lower blower speed. Alarm is active so yellow and red LED’s will activate
if pressure reaches the low or high alarm limit.
• Press to exit (blower should turn off and not go through normal start up procedure).
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