Virginia Controls, LLC MH-3000 User Manual, 1_03C10-VC Page 8
2. Controller Installation and Wiring
2.1 Controller Installation
2.1.1 Controller Location Selection and Environment
Mount the controller in a location that provides:
• adequate support for the weight of the controller,
• adequate lighting for installation and maintenance,
• convenient access for the routing of required conduits and cables,
• convenient access to other devices in the machine room,
• a minimum of vibration (supply additional bracing or reinforcement if required).
For improved controller reliability:
• Keep the machine room clean.
• Do not install the controller in a dusty area.
• Do not install the controller in a carpeted area, or area where static electricity is a
problem.
• Keep room temperature between 0C to 50C (32F to 122F), and 95% non-
condensing relative humidity. Extended high temperatures will shorten the life of
electronic components. Provide adequate ventilation or air-conditioning as required
if necessary.
• Avoid condensation on the equipment. Keep the controller away from sources of
condensation and water (such as open windows) as these can create a hazardous
condition and can damage the equipment.
• Do not install the controller in a hazardous location and where excessive amounts of
vapors or chemical fumes may be present. A NEMA 4 or NEMA 12 rated enclosure
can be provided if necessary.
• Make sure power line fluctuations are within 10%.
• High levels of radio frequency emissions may cause interference with the controller
microprocessor, and produce unexpected results. This could be caused by hand-held
communications devices used near the controller.
• Long term operation of the controller without the door or cover in place is not
recommended.
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