Extron electronic MEDIALINK MLC 52 - Manual (Page 13)

2-3 MLC 52 Series MediaLink Controllers • Installation
UL Requirements
The Underwriters Laboratories (UL) requirements listed below pertain to the
installation of the MLC into a wall or furniture.
1. Elevated operating ambient temperature — If the equipment is installed in a
closed or multiunit rack assembly, the operating ambient temperature of the
rack environment may be greater than room ambient. Therefore, consider
installing the equipment in an environment compatible with the maximum
ambient temperature (Tma) specified by the manufacturer. For the MLC 52,
the Tma is 122 °F (50 °C).
2. Reduced air flow — Installation of the equipment in a rack should be such
that the amount of air flow required for safe operation of the equipment is not
compromised.
3. Mechanical loading — Mounting of the equipment in the rack should be such
that a hazardous condition is not achieved due to uneven mechanical loading.
4. Circuit overloading — Consideration should be given to the connection of the
equipment to the supply circuit and the effect that overloading of the circuits
might have on overcurrent protection and supply wiring. Appropriate
consideration of equipment nameplate ratings should be used when
addressing this concern.
5. Reliable earthing (grounding) — Reliable earthing of rack-mounted
equipment should be maintained. Particular attention should be given to
supply connections other than direct connections to the branch circuit (e. g.,
use of power strips).
Installation Procedures
The MLC 52 can be installed into a wall or furniture. Follow the instructions
appropriate to the mounting option you have selected.
Preparing the site and installing the wall box
The installation of the MLC 52 must conform to national and local electrical codes
and to the equipment’s size requirements.
Installation using a UL listed wall box is recommended for most mounting options,
but mounting brackets can be used instead. To mount the controller using an
electrical box and/or a mounting bracket, use one of the rough-in templates
provided in appendix B, “Dimensions and Templates,” as a guide to measure and
mark the hole in the wall or furniture through which the MLC will be mounted.
The templates provide measurements for installing the control panel with either an
electrical box or a mounting bracket.
The templates are not to scale and are provided for reference only.
• The MLC 52 models include a one-gang plastic faceplate, which can be
installed on a standard one-gang electrical wall box that is at least 1.75" deep.
Mud rings are also included.
• The MLC 52 VC models have two-gang plastic faceplates, which can be
installed in a standard two-gang wall box. Mud rings are also included.
• Also available are optional faceplates that accept the MLC 52 and can be
installed into one-gang or two-gang electrical wall boxes or directly mounted
into furniture. Templates for these optional faceplates are included with each
faceplate.