Scholar V VAIVA Maintenance & Service Manual 10/2017 Rev.2
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Follow the directions in Figure 2 to ensure proper air flow rate settings.
B. Motorized Fresh Air - Configuration B. This ventilation option includes a motorized
damper, a fresh air intake blower and motor, and a blower motor speed controller.
This ventilation option can provide up to 450 CFM of outside air (but not to exceed
40% of rated airflow) and includes pressure relief (opening to outside, but no exhaust
blower). The motorized damper and blowers are controlled by a Programmable
Logic Controller (PLC). The PLC will operate the damper and ventilation motors
ONLY when the Indoor/Evaporator blower is operating. The damper is adjusted after
installation for the required rate of ventilation. A filter on the incoming outside air is
standard.
VENTILATION FAN
SPEED CONTROL
PowerVent - Configuration J (Optional). This ventilation option includes a motorized
damper, a fresh air intake blower and motor, an exhaust air blower and motor and
one blower motor speed controller. The blower speed controller operates both
blowers in tandem. (An optional blower speed control for the exhaust air blower
can be factory installed to provide independent control of the exhaust air blower
motor and allow pressurization of the classroom).The PowerVent can provide up
to 450 CFM of outside air (but not to exceed 40% of rated airflow) and includes
active pressure relief. The motorized damper and blowers are controlled by a
Programmable Logic Controller (PLC). The PLC will operate the damper and
ventilation motors ONLY when the Indoor/Evaporator blower is operating. The PLC
is factory wired for this operation by a 24 VAC signal to an input terminal on the PLC.
The damper is adjusted after installation for the required rate of ventilation. A filter on
the incoming outside air is standard.
The fresh air door is opened and closed by the motorized drive. Calibration, as shown
in Figure 3, will ensure the required amount of air, up to a maximum of 450 CFM, is
delivered to the classroom.
Follow the directions in Figure 3 to ensure the proper air flow rate setting. After
calibrating the ventilation system, replace the lower front cabinet panel.
