Operating Instructions

Laboratory Room Controller Owner's Manual
1-4 Siemens Building Technologies, Inc.
Figure 1-2. Dual Duct Supply, One Hood, One General Exhaust.
Occasionally, a change in the laboratory will lead to a change in the face velocity of the fume
hood. Changes to the face velocity of the fume hood may not require changes at the LRC;
however, the new range of fume hood airflows may lead to changes in the airflow limits of the
supply and general exhaust terminals. The signal that connects the FHC to the LRC would
have to be adjusted if the new maximum flow is more than the original signal range.