FREQUENTLY ASKED QUESTIONS

1) Can I install these controls on an existing location?
Yes, we can install the controls as either new construction or retrofit.

2) How many hoods will the Intelli-Hood® control?
Each Intelli-Hood® I/O Processor can control up to four fans.

3) Will the Intelli-Hood® work with single-phase motors?
No, the fan must be three-phase.

4) What if I don't have three-phase power on site?
We can take a 115V or 230V single-phase input through our variable frequency drives (VFDs) and convert it to 208V three-phase. These are special drives, and we are limited to 1-1/2 HP on the 115V input.

5) Can the Intelli-Hood® be integrated with a Building Management System (BMS)?
Yes, we can provide a 0-10V signal from each fan and the average of all the fans.

6) Does the Intelli-Hood® control the MUA unit as well?
Yes, we will modulate the MUA unit as an average of the exhaust fans.

7) What keeps the optic sensors within the hood from getting dirty?
Each Optic Sensor enclosure has a purge fan that keeps the environment inside the enclosure under a positive air pressure. This prevents contaminated air from entering the sensor unit.

8) Must I have direct drive fans installed to be compatible with the controls?
No. However, if the fans need to be replaced in a retrofit application, it is a good idea to consider replacing belt-drive fans with direct drive equivalents.

9) Do we need to replace our existing fan motors to high efficiency?
It is a recommended industry standard that with the installation of VFD drives that fan motors be high efficiency. Some studies have shown that motors in the higher horsepower ranges may still operate with VFD's.