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Section Eight –
Purifier Logic+ Accessories
Ventus
TM
Canopy Connection Kit
P/N 3889200, -01, -02, -03
Section 1. – Theory of Operation
The Ventus canopy system consists of a high efficiency, low profile canopy that
interfaces directly with the Logic+’s control board. Ventus offers several features that
are a distinct improvement over prior canopy designs:
The alarm system is simple, rugged, and durable; a magnetic reed switch
located on the intake valve.
The intake valve is angled such that the incoming make-up (room) air
must keep the valve open to maintain normal operation; a loss of exhaust
volume will allow gravity to close the inlet valve and open the magnetic
switch, resulting in a canopy alarm.
During a canopy alarm, in addition to the audible and visual alarms, relief
valves in the canopy will open, and the control board will run the Logic+’s
blower at full speed. These coordinated actions will help to maintain a
safe inflow to protect the operator during the alarm.
Optional Damper
Intake Valve
Alarm Switch
Relief Valve
NOTE: If the canopy was installed at the factory, go directly to Page 5, Section 4.
NOTE: Before beginning this installation, Turn the unit on, press the Menu button, select the
Services option, then the Current Settings. This will bring up the current settings screen.
Record the motor’s ECM Setting and the motor’s average RPMs once the unit operation
stabilizes.
NOTE: Exercise caution when removing or installing the exhaust filter cover, to prevent
damaging the Exhaust HEPA filter.
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