Janus FM-200 Sv Series - Elevation Changes

Page: 44
FM-200® OPERATION, DESIGN, & SERVICE MANUAL
Revision F
Document # DOC102
Issued: February 1, 2009
Revised: 11-Nov-2011
40YE
Section 3 System Design
3.6.1 Elevation Changes
Any elevation dierences between outlet tees exceeding 30 ft (9.1 m) are beyond the limitations set forth by
the Underwriters Laboratories. Although sound engineering theory is used to predict pressure changes due
to elevation, actual testing has not been performed outside of this range. Should this distance be exceeded,
consideration should be given to rerouting piping to reduce elevation dierences.
1. If nozzles are located above the discharge outlet, then the maximum elevation dierence between the
discharge outlet and the highest horizontal pipe run or discharge nozzle (whichever is highest) shall not
exceed 30 feet (9.1 m).
2. If nozzles are only located below the discharge outlet, then the maximum elevation dierence between
the discharge outlet and the lowest horizontal pipe run or discharge nozzle (whichever is lowest) shall not
exceed 30 feet (9.1 m).
3. If nozzles are located both above and below the discharge outlet, then the maximum elevation dierence
between the highest horizontal pipe run or discharge nozzle (whichever is highest) and the lowest horizontal
pipe run or discharge nozzle (whichever is lowest) shall not exceed 30 feet (9.1 m).
The outlets of a tee branch must be on the same horizontal plane or an imbalance will result from the gravitational
effects of the liquid and vapor separation and may cause one or more nozzles to not discharge the designed
concentration of FM-200®.
IN
OUT
OUT
OUT
OUT
IN
IN
OUT
OUT