Parr Instrument PDM - Manual

Installation Instructions for
Pressure Display Module (PDM)
556M
Meter Installation in 4848 Reactor
Controller
1. Unplug the power cord of the 4848 controller.
Remove the (2) screws located on the top/front
cover at the rear corners of the controller. Gen-
tly lift the cover forward, which is hinged at the
bottom, taking care not to apply tension on any
internal wiring.
2. If applicable, remove and discard the black hole
plug on the sloped front panel above the “PRES-
SURE” text. This can be done by pinching the
clasps on the back of the plug from the inside of
the front plate.
3. Insert the PDM (2082E) through the panel cutout,
from outside in, making sure the rubber gasket
is on the outside of the controller front panel.
(If wires are preinstalled, remove the terminal
connector by releasing the tabs on the sides of
the module and gently pulling the terminal con-
nector off. Reference photos below.) Slide the
white mounting bracket onto the module with
the mounting screws pointing towards the front
panel. Slide the mounting bracket forward until
it touches the controller panel. The clasps on the
mounting bracket should align with the groves
on the module. Gently tighten the screws until
the module is held into place. (If removed, reat-
tach the terminal connector.)
Terminal Connector Removal