Vsr-st, Vane type waterflow alarm switch with retard – Potter Releasing Systems User Manual
Page 101
101
FOR SMALL PIPE
PRINTED IN USA
MFG. #5401204- REV F
12/08
PAGE 3 OF 3
VSR-ST
VANE TYPE WATERFLOW
ALARM SWITCH WITH RETARD
Fig. 6
Break out thin section of cover when wiring both switches from one
conduit entrance.
Testing
The frequency of inspection and testing for the Model VSR-ST and its
associated protective monitoring system should be in accordance with
applicable NFPA Codes and Standards and/or the authority having
jurisdiction (manufacturer recommends quarterly or more frequently).
If provided, the inspector’s test valve, that is usually located at the end
of the most remote branch line, should always be used for test purposes.
If there are no provisions for testing the operation of the flow detection
device on the system, application of the VSR-ST is not recommended
or advisable.
A minimum flow of 10 GPM (38 LPM) is required to activate this device.
Maintenance
Inspect detectors monthly for leaks. If leaks are found, replace the detector.
The VSR-ST waterflow switch should provide years of trouble-free
service. The retard and switch assembly are easily field replaceable. In
the unlikely event that either component does not perform properly, please
order replacement retard switch assembly stock number 1029030. There
is no maintenance required, only periodic testing and inspection.
Important Notice
Please advise the person responsible for testing of the fire protection system
that this system must be tested in accordance with the testing instructions.
Removal
• To prevent accidental water damage, all control valves should be
shut tight and the system completely drained before waterflow
detectors are removed or replaced
• Turn off electrical power to the detector, then disconnect wiring
• Loosen union nut and separate unit from the glued in fitting.
• Gently lift the unit far enough to get your fingers under it. With
your fingers, roll the vane so it will fit through the fitting while
continuing to lift the waterflow detector.
• Lift detector clear of pipe
DWG# 1205-4