Potter Releasing Systems - Manual (Page 19)

19
Pressure Type Flow Switch Installed On Top Of Retard Chamber
Fig. 3
Note:
Unless excess pressure is pumped into system, the waterflow device should have a retard per NFPA 72 2010
17.12. There shall be no shut-off valve in line to a pressure type waterflow switch, unless the shut-off is
electrically supervised. The Potter Model RBVS is designed to electrically supervise ball valves.
RISER TO
SPRINKLER HEADS
WATER
PRESSURE
GAUGE
(SYSTEM
PRESSURE)
(OPEN)
(OPEN)
BY-PASS LINE
CHECK VALVE USED TO
BUILD SYSTEM PRESSURE
FROM SMALL SURGES
WATER PRESSURE GAUGE
(CITY PRESSURE)
TAMPER
DEVICE
OSYSU
OSY CONTROL VALVE (OPEN)
WATER PRESSURE FROM
CITY MAINS
DRAIN
PIPE
WATER BY-PASS
TEST VALVE
(CLOSED)
CHECK
VALVE
RBVS
STRAINER
DRIP
CUP
DRAIN
RETARD
CHAMBER
DRAIN
VALVE
(CLOSED)
ANY SHUT-OFF VALVE IN
LINE WITH A PRESSURE
SWITCH IS REQUIRED TO BE
SUPERVISED PER NFPA 72
CHECK
WATERFLOW
SWITCH
PS10-1
PS10-2
TO WATER
MOTOR
GONG