_________________________________________________Chapter 4 – Smoke Control Section, Page 4-49
Wash System – Troubleshooting (Cont.)
Backflow Preventer – Cont.
Initial Start-Up
To avoid water hammer or shock damage, perform the following initial start-up procedures:
1.
Close the Outlet Hand Valve.
2.
Open the Inlet Hand Valve slowly, fill the valve and bleed the air through test cock number 2, 3, and 4.
3.
When the valve is filled, open the Outlet Hand Valve slowly and fill the remaining water supply system.
The initial start-up procedure is now complete.
Intermittent Discharge
Intermittent discharge of water through the relief valve is fairly common and usually occurs if there are
inlet pressure fluctuations of more than 3 psi and when a solenoid valve closes after a Wash Cycle.
Continuous Discharge
If there is continuous discharge or rapid spitting of water out the relief valve when the Ventilator is not in a
Wash Cycle, contact the Watts Regulator Company for service.
Caution: In no case should the relief valve outlet port be plugged, closed off or restricted.
Note: Local jurisdictions typically require annual inspections and testing by a company certified and
licensed to perform such duties. For the name of your nearest certified company, call Watts Regulator,
815 Chestnut St., North Andover, MA 01845. Phone 978-689-6066.
Figure 4-49-1
Backflow Preventer
Test Cock 1
Test Cock 2
Test Cock 3
Test Cock 4
Inlet Hand
Valve
Outlet
Hand Valve
Air Gap Assembly
(water discharge point
