Thermon FLX - Manual (Page 7)

FLX
TM
Self-Regulating
6
Installation Guidelines for Fire Protection Systems
1. Where above ground water-filled supply pipes, risers, sys-
tem risers or feed mains pass through open areas, cold
rooms, passageways, or other areas exposed to freezing
temperatures, the pipe shall be protected against freezing in
accordance with NPFA 13, "Standard for the Installation of
Sprinkler Systems".
2. Thermon's FLX Self-Regulating Heating Cables are UL Listed
for use on Fire Protection System Piping feed mains, risers,
and cross mains (excluding branch lines). This application
approval includes piping which connects between build-
ings in unheated areas, piping located in unheated areas or
piping through coolers or freezers. As with all heat traced
piping systems, thermal insulation is required to ensure the
heating system can compensate for heat losses.
3. In accordance with IEEE 515.1 guidelines, the use of ambi-
ent sensing control with low temperature and continuity
monitoring as a minimum for all fire protection piping heat
tracing systems is required; Thermon recommends the use
of an electronic controller with RTD sensing be considered
for these applications.
Feed Main
Branch Line
End
Termination Cross Main
RTD
Riser
PCS-COM
Heater
Electronic Controller
(Recommended)
PCA-COM
Cold Room
Conditioned
Area
THE NFPA DEFINES THE FOLLOWING:
Branch Lines—The pipes in which the sprinklers are placed,
either directly or through risers.
Cross Mains—The pipes supplying the branch lines, either
directly or through risers.
Feed Mains—The pipes supplying cross mains, either directly
or through risers.
Risers—The vertical supply pipes in a sprinkler system.