To prevent accidental water damage, control valves should be shut tight and drain the system completely before waterflow detectors are removed or replaced. Inspect the detectors in accordance with applicable NFPA codes and standards for leaks and replace if a leakage occurs. Test the detectors at least quarterly, as described under Operational Testing, to ensure proper operation. Under normal conditions, VDRS waterflow detectors should provide years of trouble-free service. However, if the delay mechanism becomes faulty, a replacement kit is available. To replace the delay mechanism, request Part No. IMWIDY. Complete instructions are enclosed with replacement parts. The mechanism can be easily replaced without removing the detector from the pipe or draining the pipe. Do not repair or replace any other waterflow detector components. If any other part of the detector does not perform properly, replace the entire detector. Installation methods other than those listed in this installation manual may prevent the device from reporting the flow of water in the event the associated sprinkler system is activated by a fire, Iron Man is not responsible for devices that have been improperly
installed, tested, or maintained.
To remove a detector:
1. Drain the pipe.
2. Turn off electrical power to the detector and disconnect the wiring.
3. Loosen the nuts and remove the U-bolts.
4. Gently lift the saddle far enough to get your fingers under it. Then, roll
the vane so it will fit through the hole while continuing to lift the
waterflow detector saddle.
5. Lift the detector clear of the pipe.
