5. Once the proper adjustment is obtained verify the outlet pressure is correct with pressure
gauges both upstream and downstream of the valve during both flow and no-flow pressure
testing; make adjustments as needed. See Section 8-2.5 of NFPA 13 for more details on
required flow and no-flow testing.
6. Once the valve is properly adjusted replace the tamper-resistant screw that was removed in
step 2.
7. A tamper-resistant allen wrench and adjustment tool should be stored in a special location
for Fire Department use.
NOTE: Rotating the adjustment cylinder clockwise will increase outlet pressure. Conversely,
rotating the adjustment cylinder counter-clockwise will decrease outlet pressure.
SUPERVISORY SWITCH
Pressure reducing/ controlling valves that are to be used as part of a sprinkler system should
include a supervisory switch to signal when a valve is not manually in the fully opened
position (refer to NFPA 13 for more details on supervisory requirements). An optional
supervisory switch assembly with UL approval for use with URFA valves is available on all
models. The supervisory switch may be mounted to either side of the upper bonnet in the ¾
inch tapped holes provided. A cap plug is secured in the upper bonnet tapped holes when the
supervisory switch is not installed. A UL Listed conduit elbow is utilized as a water-resistant
enclosure for the electronic switch. The conduit elbow provides an opening for fastening
conduit to the enclosure, and a lid may be removed to gain access for wiring connections. The
lid is attached with two pin-in-hex security screws. A key is provided for installation access
into the conduit enclosure. Figure 2 describes wiring details. The solid blue and green wires
act as a primary wiring configuration with the blue-on-white and green-on-white act as a
secondary or back up wiring configuration.
Note: Supervisory switch rated for Indoor Use Only.
Figure - 2
