Watlow Series 965 - Manual (Page 6)

Install and Wire, Chapter 2
6
WATLOW Series 965 User's Manual
Installation
NOTE:
To guarantee a
proper NEMA 4X
seal, make sure
the gasket
between the panel
and the rim of the
case is not twisted
and is seated
properly.
PRESS FIRMLY.
Figure 4 -
Mounting, Case Side
View & Collar Cross
Section
Figure 5 -
Case Rear View and
NEMA 4X Seal
Example
4B
0 to 0.019 space
(0 to 0.483 mm)
Bezel
Panel
External Gasket
Mounting Collar
Ridges
Teeth
Tabs
4A
When removing the mounting collar, we suggest sliding a thin tool such as
a putty knife or screwdriver under all three tabs on each side at once and
pulling it back off the case.
5. Insert the control chassis into its case and press the bezel to seat it. Make
sure the inside gasket is also seated properly and not twisted. The hard-
ware installation is complete. Proceed to the wiring section from here.
4. While pressing the front of the case firmly against the panel, slide the
mounting collar over the back of the control. The tabs on the collar must
line up with the mounting ridges on the case for secure installation. See
Figure 4A again. Slide the collar firmly against the back of the panel getting
it as tight as possible. Make sure you cannot move the case within the
cutout; if you can you do not have a NEMA 4X seal.
Now let's make sure we have a tight seal. Use your thumb to lock the tabs
into place while pressing the case from side to side. Don't be afraid to apply
enough pressure to install the control. The tabs on each side of the collar
have teeth which latch into the ridges. See Figure 4B. Each tooth is stag-
gered at a different height, so only one of the tabs on each side are ever
locked into the ridges at any time.
Looking at Figure 5, you see that the tabs on one side of the collar corre-
spond with those on the opposite side. Make sure that the two correspond-
ing tabs are the only ones locked in the ridges at the same time. If the
matching tabs are not holding the case at the same time you will not have
a NEMA 4X seal. You can make a visual check, or use your finger nail to
pull out on each tab. Only one on each side is engaged, and they must
be corresponding as in Figure 5. The space between the bezel and
panel must be between 0 and 0.019" (0.48 mm).
NEMA 4X Seal Example.
Make sure that the two correspond-
ing tabs below are locked in the
ridges at the same time.
Mounting Collar
Cross Section
(notice the offset teeth
on each tab)