Watlow EZ-ZONE PM L AAAAB Series, User Manual

Page: 9 / 30

EZ-ZONE PM Limit Express • 9 • Install & Wiring
Installation
RETENTION COLLAR
CASE
PANEL
BEZEL
GASKET
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,
slide the mounting collar up to the back of the panel
tight enough to eliminate the spacing between the
gasket and the panel.
Slide the mounting col-
lar over the back of the
controller.
Place the blade of a
screwdriver in the
notch of the mount-
ing collar assembly.
3. For a NEMA 4X seal, place the blade of a
screwdriver in the notch of the mounting collar
assembly and push toward the panel while
applying pressure to the face of the controller.
Don't be afraid to apply enough pressure to
properly install the controller.
The seal system is compressed more by mat-
ing the mounting collar tighter to the front
panel (see picture). 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 controller. 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.
Removing the Mounted Controller from Its Case
1. From the controller's face, pull out the tab on
each side until you hear it click.
Pull out the tab on
each side until you
hear it click.
Grab the unit above
and below the face
and pull forward.
2. Once the sides are released, grab the unit
above and below the face with two hands and
pull the unit out. If it is difficult to pull the unit
out, remove the connectors from the back of
the controller. This should make it easier to
remove.
Ó
Warning:
All electrical power to the controller and con-
trolled circuits must be disconnected before
removing the controller from the front panel
or disconnecting other wiring.
Returning the Controller to its Case
1. Ensure that the orientation of the controller is
correct and slide it back into the housing.
2. Using your thumbs push on either side of the
controller until both latches click.
Note:
The controller is keyed so if it feels that it will
not slide back in do not force it. Check the ori-
entation again and reinsert after correcting.
Chemical Compatibility
This product is compatible with acids, weak alkalis,
alcohols, gamma radiation and ultraviolet radiation.
This product is not compatible with strong alkalis,
organic solvents, fuels, aromatic hydrocarbons, chlo-
rinated hydrocarbons, esters and keytones.