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Pressure Testing
(Cont.)
9. Monitor the system pressure for a few minutes to ensure that it is stabilized.
Due to the potential risk that can be involved it is recommended that the pressure test be kept to the minimum
time required by the local code. Do not allow people to work around the system when the circulation system is
under pressure test. Post appropriate warning signs and establish a barrier around the pressurized equipment. If the equipment is
located in an equipment room, lock the door and post a warning sign.
Never attempt to adjust any closures or lids or attempt to remove or tighten bolts when the system is pressurized. These actions can
result in a separation or failure of system components. This instantaneous release of energy can cause components to be accelerated
to high velocities and to travel distances of 100 ft (30.5 meters) or more. These components could cause severe personal injury or
death if they were to strike a person.
10. It is normal for the test pressure to drift down slightly during the first few minutes as the circulation system
expands under pressure.
11. If the system pressure continues to fall, then bleed off the remaining water pressure in the circulation system
and inspect the system for leaks. Look for water on the floor and feel around joints for moisture.
12. Ensure the system is not under pressure before attempting any system adjustments or repairs.
13. Repeat the pressurization sequence once the system leaks have been corrected.
Pressure Relief Valve
If a strainer pot is installed, use a pressure relief valve (P/N 350087) in the drain plug of the strainer pot.
Figure 5
Pressure Relief Valve
Pressure Relief
Drain Plug
Valve
EQ SERIES® High Performance Commercial Pump Installation and User' s Guide
5
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