User guide

Watlow EZ-ZONE
®
PM PID Controller • 12 • Chapter 2 Install and Wire
Installation
1. Make the panel cutout using the mounting template dimensions in this chapter.
Insert the case assembly into the panel cutout.
2. While pressing the case assembly firmly against the panel, slide the mounting collar over the back of the
controller.
If the installation does not require a NEMA 4X seal, simply slide together until the gasket is compressed.
3. For a NEMA 4X (UL50, IP66) seal, alternately place and push the blade of a screwdriver against each
of the the four corners of the mounting collar assembly. Apply pressure to the face of the controller while
pushing with the screwdriver. Don't be afraid to apply enough pressure to properly install the controller.
The seal system is compressed more by mating the mounting collar tighter to the front panel (see pictures
above). If you can move the case assembly back and forth in the cutout, you do not have a proper seal.
The tabs on each side of the mounting collar have teeth that latch into the ridges on the sides of the con-
troller. Each tooth is staggered at a different depth from the front so that only one of the tabs, on each
side, is locked onto the ridges at a time.
Note:
There is a graduated measurement difference between the upper and lower half of the display to the panel.
In order to meet the seal requirements mentioned above, ensure that the distance from the front of the top
half of the display to the panel is 16 mm (0.630 in.) or less, and the distance from the front of the bottom
half and the panel is 13.3 mm (0.525 in.) or less.
Slide the mounting collar over
the back of the controller.
Place the blade of a screw-
driver in the notch of the
mounting collar assembly.