Chapter 3-Installation
3-21
Mounting Considerations
Once you have established a location for the 3510/3512, install it in the enclosure
according to the instructions that follow:
•
Select a NEMA rated enclosure and place the unit to allow easy access to the
system ports.
•
Account for the unit’s depth when choosing the depth of the enclosure.
•
Provide a NEMA 4 seal by mounting the unit in an approved enclosure that has a
14 gauge (0.075"/1.9mm thick) steel or (0.125"/3.2mm thick) aluminum front
face.
•
Mount the unit in an upright position.
•
Place the unit at a comfortable working level.
•
Consider locations of accessories such as AC power outlets and lighting (interior
lighting and windows) for installation and maintenance convenience.
•
Prevent condensation by installing a thermostat-controlled heater or air
conditioner.
•
To allow for maximum cooling, avoid obstructing the air flow.
•
Place any fans or blowers close to the heat generating devices. If using a fan,
make sure that outside air is not brought inside the enclosure unless a fabric or
other reliable filter is used. This filtration prevents conductive particles or other
harmful contaminants from entering the enclosure.
•
Do not select a location near equipment that generates excessive electromagnetic
interference (EMI) or radio frequency interface (RFI) (equipment such as high
power welding machines, induction heating equipment, and large motor starters).
•
Place incoming power line devices (such as isolation or constant voltage
transformers, local power disconnects, and surge suppressers) away from the
system. The proper location of incoming line devices keeps power wire runs as
short as possible and minimizes electrical noise transmitted to the unit.
•
Make sure the location does not exceed the unit’s shock, vibration, and
temperature specifications.
•
Install in the rack or panel in such a way as to ensure that it does not cause a
hazard from uneven mechanical loading.
•
Incorporate a readily accessible disconnect device in the fixed wiring on
permanently connected equipment.
•
Avoid circuit overloading of the supply circuit.