NuAire LabGard NU-813-300, Руководство по эксплуатации и техническому обслуживанию

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OM0236 Page 30 of 52
February/2019
7.5.3 Airflow Calibration
Failure to calibrate airflow to the specified requirements may result
in unsafe conditions of performance (i.e. product and/or personnel
protection, noise and vibration)
The NU-813 Airflow Calibration consists of adjusting the airflow.
THIS WORK SHOULD BE DONE ONLY BY A QUALIFIED TECHNICIAN WHO CAN MEASURE THE AIRFLOW WITH A
SUITABLE VELOMETER.
NuAire provides one adjustment to set the airflow within the cabinet.
This is: PWM signal adjust via calibration parameter menu.
The PWM signal or blower speed adjustment establishes the CVE’s total volume of airflow as well as makes up for
filter resistance tolerances.
DC ECM motor PWM signal DC voltage should also be monitored and recorded upon final calibration. The DC
voltage may be measured using a digital voltmeter. The two test points to measure DC ECM motor voltage are
located on the DC motor connector on the main control board.
The CVE is considered to be certifiable if the following airflow measurements are present:
Inflow average: 80 LFPM + 5 LFPM (.41 m/s + 0.25 m/s) using the direct inflow measurement method or related value
using the calculated inflow velocity measurement method.
BEFORE STARTING AIRFLOW CALIBRATION PROCEDURE, LET THE CVE RUN FOR AT LEAST 5 MINUTES.
CAUTION
!