_O & M MANUAL - WEST LANE MOBILE HOME PARK

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i SAFETY PRECAUTIONS It is important that all personnel observe safety precautions to minimize the chances of injury. Among many considerations, the following should be particularly noted: • Blower casing and associated piping or accessories may become hot enough to cause major skin burns on contact. • Internal and external rotating parts of the blower and driving equipment can produce serious physical injuries. Do not reach into any opening in the blower while it is operating, or while subject to accidental starting. Protect external moving parts with adequate guards. • Disconnect power before doing any work, and avoid bypassing or rendering inoperative any safety or protective devices. • If blower is operated with piping disconnected, place a strong coarse screen over the inlet and avoid standing in the discharge air stream. CAUTION: Never cover the blower inlet with your hand or other part of body. OPERATING LIMITATIONS A ROOTS' blower or exhauster must be operated within certain approved limiting conditions to enable continued satisfactory performance. Warranty is contingent on such operation. Maximum limits for pressure, temperature and speed are specified in TABLE 1 for various models & sizes of blowers & exhausters. These limits apply to all units of normal construction, when operated under standard atmospheric conditions. Be sure to arrange connections or taps for thermometers and pressure or vacuum gauges at or near the inlet and discharge connections of the unit. These, along with a good tachometer, will enable periodic checks of operating conditions. PRESSURE — The pressure rise, between inlet and discharge, must not exceed the figure listed for the specific unit frame size concerned. Also, in any system where the unit inlet is at a positive pressure above atmosphere a maximum case rating of 25 PSI gauge (1725 mbar) should not be exceeded without first consulting the ROOTS. Never should the maximum allowable differential pressure be exceeded. On vacuum service, with the discharge to atmospheric pressure, the inlet suction or vacuum must not be greater than values listed for the specific frame size. TEMPERATURE — Blower & exhauster frame sizes are approved only for installations where the following temperature limitations can be maintained in service: • Stay clear of open inlet piping (suction area) of pressure blowers, and the open discharge blast from vacuum blowers. • Stay clear of the blast from pressure relief valves and the suction area of vacuum relief valves. • Use proper care and good procedures in handling, lifting, installing, operating and maintaining the equipment. • Casing pressure must not exceed 25 PSI (1725 mbar) gauge. Do not pressurize vented cavities from an external source, nor restrict the vents without first consulting ROOTS. • Do not use air blowers on explosive or hazardous gases. • Other potential hazards to safety may also be associated with operation of this equipment. All personnel working in or passing through the area should be trained to exercise adequate general safety precautions. • Measured temperature rise must not exceed listed values when the inlet is at ambient temperature. Ambient is considered as the general temperature of the space around the unit. This is not outdoor temperature unless the unit is installed outdoors. • If inlet temperature is higher than ambient, the listed allowable temperature rise values must be reduced by 2/3 of the difference between the actual measured inlet temperature and the ambient temperature. • The average of the inlet and discharge temperature must not exceed 250°F (121 °C). SPEED — These blowers & exhausters may be operated at speeds up to the maximum listed for the various frame sizes. They may be direct coupled to suitable constant speed drivers if pressure/tempera- ture conditions are also within limits. At low speeds, excessive temperature rise may be a limiting factor. Special Note: The listed maximum allowable tempera- ture rise for any particular blower & exhauster may occur well before its maximum pressure or vacuum rating is reached. This may occur at high altitude, low vacuum or at very low speed. The units' operating limit is always determined by the maximum rating reached first. It can be any one of the three: Pressure, Temperature or Speed. For your nearest ROOTS Office, dial our Customer Service Hot Line 1 877 363 ROOTS (7668).