Red Lion PCU - Manual (Page 13)

UNIT REMOVAL PROCEDURE
To remove a NEMA 4X/IP65 or standard unit from the panel, first unscrew
and remove the panel latch screws. Insert flat blade screwdrivers between the
latch and the case on the top and bottom of the unit, so that the latches
disengage from the grooves in the case. Push the unit through the panel from
the rear.
REMOVING BEZEL ASSEMBLY
The bezel assembly, shown in Figure 2, must be removed from the case to
install or replace output modules, or to set the 115/230 VAC selector switch.
Disconnect power to the unit and to the output control circuits to eliminate the
potential shock hazard when removing the bezel assembly. To remove a
standard bezel assembly (without bezel securing screws), press the latch
under the lower bezel lip and withdraw the bezel assembly. To remove the
sealed NEMA 4X/IP65 bezel assembly, loosen the two bezel securing screws
until a slight “click” is felt (the screws are retained in the bezel) and withdraw
the assembly.
Caution: The bezel assembly contains electronic circuits that are damaged by
static electricity. Before removing the assembly, discharge stray static
electricity on your body by touching an earth ground point. It is also important
that the bezel assembly be handled only by the bezel itself. Additionally, if it is
necessary to handle a circuit board, be certain that hands are free from dirt,
oil, etc., to avoid circuit contamination that may lead to malfunction. If it
becomes necessary to ship the unit for repairs, place the unit in its case before
shipping it.
INSTALLING BEZEL ASSEMBLY
To install the standard bezel assembly, insert the assembly into the case
until the bezel latch snaps into position.
To install the NEMA 4X/IP65 bezel assembly, insert the assembly into the
case and tighten the bezel screws uniformly until the bezel contacts the case
and then turn each screw another half turn to insure a watertight seal (do not
over-tighten screws).
Caution: When substituting or replacing a bezel assembly, be certain that it is
done with the same model using the same Output Modules. Damage to the
controller may result if the unit’s output modules are not the same. A NEMA
4X/IP65 and a standard bezel assembly are NOT interchangeable.
OUTPUT MODULES
The main control, optional Alarm, optional Secondary output and optional
Valve Position control output sockets must be fitted with the appropriate
output module. Output modules are shipped separately and must be installed
by the user.
Output Module Restrictions
With some models, the Alarm outputs and Valve Position outputs share the
same common terminal. When using these models, the same type of output
modules should be installed in these positions.
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Figure 2, Bezel Assembly