Honeywell L404T Manuel D’Utilisation

7

71-2429—2

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.