Emerson ROC827 instruction manual Environmental Requirements, Site Requirements

ROC827 Instruction Manual

ground conditions, climate, and accessibility), this document only provides generalized guidelines.

2.1.1 Environmental Requirements

Always install the ROC827 in a user-supplied enclosure, as the ROC827 requires protection from direct exposure to rain, snow, ice, blowing dust or debris, and corrosive atmospheres. If you install the ROC827 outside a building, it must be placed in a National Electrical Manufacturer’s Association (NEMA) 3 or higher rated enclosure to ensure the necessary level of protection.

Note: In salt spray environments, it is especially important to ensure that the enclosure—including all entry and exit points—is sealed properly.

The ROC827 operates over a wide range of temperatures. However, in extreme climates it may be necessary to provide temperature-controlling devices to maintain stable operating conditions. In extremely hot climates, a filtered ventilation system or air conditioning may be required. In extremely cold climates, it may be necessary to provide a thermostatically controlled heater in the same enclosure as the ROC827. To maintain a non-condensing atmosphere inside the ROC827 enclosure in areas of high humidity, it may be necessary to add heat or dehumidification.

2.1.2 Site Requirements

When locating the ROC827 on the site, careful consideration can help reduce future operational problems. Consider the following items when choosing a location:

ƒLocal, state, and federal codes often place restrictions on locations and dictate site requirements. Examples of these restrictions are fall distance from a meter run, distance from pipe flanges, and hazardous area classifications. Ensure that all code requirements are met.

ƒChoose a location for the ROC827 to minimize the length of signal and power wiring.

ƒLocate ROC827s equipped for radio communications so the antenna has an unobstructed signal path. Antennas should not be aimed into storage tanks, buildings, or other tall structures. If possible, antennas should be located at the highest point on the site. Overhead clearance should be sufficient to allow the antenna to be raised to a height of at least twenty feet.

ƒTo minimize interference with radio communications, choose a location for the ROC827 away from electrical noise sources, such as engines, large electric motors, and utility line transformers.

Issued Mar-06 Installation and Use 2-2