L404F,T,V PRESSURETROL® CONTROLLERS
7 71-2429—2
CHECKOUT
After the controller has been installed, wired and adjusted, it
should be tested with the system in operation. First, allow the
system to stabilize. Then, observe the operation of the
controller while raising and lowering its setpoint. Pressure
should increase when the setpoint is raised and decrease
when the setpoint is lowered.
Also, check the make and break points of the controller. If they
do not agree with a separate, accurately calibrated pressure
gauge, a slight adjustment of the scaleplate(s) may be
necessary.
Use accurate pressure testing equipment when checking out
the controller. Do not rely on inexpensive gauges. The
controllers are carefully calibrated at the factory.