Nortec HP Series Installation And Operation Manual page 39

11 Shut the system off and reconnect the manifolds. Restart the system as per step 9 and
observe the spray patterns and check for leaks.
12 Ensure that the spray pattern is uniform does not strike duct walls.
13 Ensure that water collects in the drains and does not pool in the duct.
14 If a mist eliminator or cooling coil is used for mist elimination, ensure that no mist is passing
through.
15 Select AUTO on the pump skid, ensuring that all testing jumpers have been removed. The
system is now ready to run.
Calibration
The needle valve is used to reduce water that may occur when the valves open and close. For it
to work correctly, it must be calibrated.
1 Install the needle valve, and adjust the valve to the fully open position by turning the handle
counterclockwise.
2 Run the humidifier full output, so that all valves are open and all nozzles are spraying water.
3 Observe the nozzle spray near the top of the manifolds. Increase the flow restriction by
turning the needle valve clockwise until nozzle spray near the top of the manifolds begins to
visibly decrease.
4 Turn the needle valve two full turns counterclockwise. Turn the system off and back on.
5 Ensure that the water hammer has decreased. Observe the nozzles to ensure that they are
still spraying correctly. Note: After installing the needle valve, the manifolds may take a few
seconds to charge and begin spraying.
HP Series Installation Manual | 36