7
Scholar V VAIVA Maintenance & Service Manual 10/2017 Rev.2
Inside the lower section, locate the circular calibration plates as
noted in the drawing (“A” is fixed, “B” is movable). Remove the
screw shown by the arrow from “Manual Settings.”
Rotate plate B in a clockwise direction until the hole from which the
screw was removed aligns with the hole adjacent to the desired
air flow rate, in CFM.
Reinsert the screw into the hole in plate B and firmly drive the
screw through the appropriate air flow rate hole, so plate B is
securely fastened at the desired opening.
Figure 2. Manual Fresh Air System Calibration Procedure
Inside the lower section, locate the circular calibration plates as
noted above in the drawing (“A” is fixed, “B” is movable). Remove
the screw shown by the arrow from “motorized settings.”
Reinsert the screw into the hole in plate B adjacent to the desired
air flow rate, in CFM, and firmly drive the screw in until it bottoms
out at the screw head.
Figure 3. Motorized and PowerVent System Calibration Procedure
C. GreenWheel
®
and GreenCube
®
ERV. Using best industry standards and practices,
observe that fresh air is being brought into the classroom. For units with one speed
controller (std.), adjust the speed of the intake and exhaust blowers by inserting a
slotted screw driver into the opening on the controller. The speed controller is located
in the control box. Measure the intake air again and adjust the speed of the blowers.
Repeat as necessary to meet the fresh air requirements.
For units with the optional variable fan speed controller for the exhaust blower on
the GreenWheel or GreenCube ERV, first measure the air being introduced into the
classroom using best industry standards and practices. Adjust the speed of the intake
air blower until the required outside air is being brought into the classroom.
Now observe the exhaust air from the classroom. Adjust the speed of the exhaust
air blower until the required air is being exhausted from the classroom. The exhaust
air controller is in the control box. It is usual practice to pressurize the classroom by
exhausting slightly less air than is being brought into the classroom.
