Installation; Physical Installation; Panel Mount; Wall Mount - MERRICK MC3 Hardware Manual

INSTALLATION

Carefully unpack the controller and inspect it for obvious damage because of shipping or
handling. If the unit appears to be damaged in any way, contact the Merrick Service Department
for assistance.
Insure that the power is disconnected from the power supply. Make the wiring connections to the
controller, following the instructions on the electrical connection diagram. In order to maintain the
weatherproof integrity of the Wall Mount enclosure, liquid-tight conduit and conduit connectors
must be used when running the wires. It is recommended to penetrate the enclosure from the
bottom. This will insure a watertight environment for the electronics. Verify all wiring connections
before applying power to the controller.
NOTE: Before any deviation from the supplied wiring diagrams, Merrick must first be consulted
to insure safe and proper operation of the controller. See cover page for contact information
regarding the Merrick Support.

PHYSICAL INSTALLATION

Panel Mount

Cut panel to dimensions provided in APPENDIX A (Panel Mount (A30685) – Dimensions) on
page 49. Care must be used when cutting due to tight tolerances for the panel mount bezel.
Also, insure there is adequate clearance around the controller for maintenance and ventilation.
Install the controller into panel using the mounting brackets provided.
There are two screws on each side of the top cover. Remove them before putting the controller in
the panel if you will not be able to get to them because of space restrictions.

Wall Mount

Mount the controller on a vertical surface, Use dimensions provided in APPENDIX A (Wall
Mount (A30833, A31534) – Mounting Dimensions) on page 51 for placement of hardware used
to secure enclosure to surface. Make sure there is adequate clearance around the unit for
swinging open the door and for maintenance.

Door Mount

Cut cabinet door to dimensions provided in APPENDIX A (Door Mount (A33432, A39307) -
Dimensions) on page 53. Insure there is adequate clearance around the controller for
maintenance and ventilation. Install the controller into cabinet door using the mounting brackets
provided. The Power Supply should be mounted on the Cabinet panel in the cabinet. Make sure
the cable supplied is long enough to reach the intended mounting location. Mount any
Backplanes on the cabinet panel, using standoffs, to keep the back of the board from shorting
against plate. Again, make sure the ribbon cables are long enough to go from the controller to
the boards. Route the ribbon cables away from any power cables or switching circuits, which
could induce a signal into the ribbon cables.
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MC3 Hardware Manual