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PAGE 6 OF 6
AUTO TEST VSR (VSR-AT)
VANE TYPE WATERFLOW ALARM SWITCH WITH
ELECTRONIC RETARD AND AUTO TEST FEATURE
MFG. #5401239 - REV B
3/14
Trouble Shooting Guide
A successful completion of the Auto Test will momentarily activate both sets of normally open contacts on the flowswitch for approximately 2
seconds.
If the Auto Test detects a problem with the trip stem/paddle assembly, or if there is no water in the pipe, neither normally open contact will
operate. The flowswitch will then indicate a trouble condition at the ATC test switch and transmit a trouble signal to the fire alarm control
panel.
When Fire Panel Stays in Trouble:
•
Check the wiring
•
The zone of the fire panel should be wired to the VSR-AT as
shown on pg. 4 of bulletin 5401239. The End of Line Resistor
should be installed as shown across the terminals marked C and
the terminal to the right of C which is indicated by the other end
of the resistor symbol. The zone of the fire panel connects to the
terminals marked C and N.O.
•
The NO and End of Line Resistor terminals are connected in-
ternally by a normally energized relay. A loss of power or failed
AutoTest causes the relay to drop out and initiates a trouble at the
fire panel.
•
The only way to clear the trouble on the fire panel is to conduct
a successful AutoTest using the ATC test switch or other test
method. Conducting an actual waterflow test will put the panel in
alarm but will not clear the trouble.
When VSR-AT Fails the Auto Test:
•
Is there water in the pipe? The VSR-ST will fail the AutoTest if
the pipe it is installed on is not full of water.
•
Has the return spring on the VSR-AT been adjusted? This spring
has been factory set and should not be adjusted
in the field. Refer to Figure 8 to determine the factory spring
setting. If the spring is not at the factory setting, turn the spring
adjustment screw until the factory spring setting is restored.
•
For other issues contact Potter Tech Support at 866-956-1211
or visit our web site at http://www.pottersignal.com/ run your
mouse over the FIRE SPRINKELR MONITORING header and
select Tools and Resources. Click on presentations to select the
VSR-AT Tech brief or troubleshooting video
Fig. 8
Return Spring set
to Factory Mark
