NuAire LabGard NU-560-400, Operation & Maintenance Manual

Page: 58 / 103

OM0295
Rev 2 September 2020 Page 58 of 103
Step 3: At this point, the night setback is active and the butterfly valve will begin to close. Now measure
the inflow volume using a Direct Reading Instrument of inflow velocity measurement method.
The goal is to reduce the inflow volume to the following values, which represents approximately
100 fpm (.51m/s) inflow, or may be set at any other values within the damper operational range
of 30% to 80%.
NU-560-400 270 CFM/459 CMH
NU-560-600 410 CFM/697 CMH
Please note, in the night setback operation, the electronic airflow control system will cause the
butterfly valve actuator to hunt more operating at lower airflow volumes. When taking the
inflow volume measurements, average several readings to obtain the most accurate results.