Appendix III, continued
100
Using the Municipal Water Supply With a Master Valve (NC or NO)
In this installation, a field decoder attaches to a Normally closed or Normally open master valve installed as
a pump. Please see the illustration below. When setting up the controller, enter the decoder address in the
pump Address field and change the switch code to 49F350, which is the setting for a standard 24 VAC/2-3 W
irrigation valve.
With the above setup, the flow sensor monitors the flow rate. If, during irrigation, the flow exceeds its maximum
rate, the controller sends a signal shutting off a Normally closed master valve. A Normally closed master valve is
open when a Program is running.
If the master valve is Normally open, exceeding the maximum flow will shut off all valves. Because none of the
valves are open, any additional flow detected is considered a leak in the system. Once the flow surpasses the
alarm leakage schedule, the field decoder activates, closing the Normally open master valve.
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