SPX Cooling Technologies Marley MD Specifications, Specification Value, Premium Efficiency Motor

Marley / MD CoolingTower / Specifications: Options

Specifications Specification Value

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start and stop control, bypass/VFD selec- tion, Auto/Manual selections, manual speed control. To prevent heating prob- lems in the cooling tower fan motor and to assure proper gear reducer lubrication the VFD system shall de energize the motor once 25% motor speed is reached and cooling is no longer required. The cooling tower manufacturer shall supply VFD start-up assistance. Tower vibration testing throughout the speed range is required to identify and lockout any natu- ral frequency vibration levels which may exceed CTI guidelines.

Miscellaneous Options

Equalizer Flume Weir Gates:

11.2Add the following paragraph under Cold Water Collection Basin: The interconnecting flume between cells shall be equipped with a removable cover plate to permit the shutdown of one cell for maintenance purposes, or to permit independent cell operation.

Premium Efficiency Motor

6.3Replace paragraph 6.3 with the fol- lowing: The complete mechanical equipment assembly for each cell shall be supported by a rigid, hot-dip galvanized steel structural support that resists misalignment between the motor and sheaves (pulleys). For belt- drive towers with motors inside the airstream, motors shall be mounted on an adjustable base that swivels outside the access door for maintenance. For belt-drive towers with motors mounted outside the airstream, a protective cover shall be mounted over the motor and sheave to protect it from the weather and prevent inadvertent con- tact. The mechanical equipment assem- bly shall be warranted against any fail- ure caused by defects in materials and workmanship for no less than five (5) years following the date of tower ship- ment. This warranty shall cover the fan, speed reducer, motor, drive shaft and couplings, and the mechanical equip- ment support. The bearing assemblies and V-belts shall be warranted for 18 months.

■Where it is your intention to be able to operate both cells of the tower while the flume cover plate is installed, separate outlet connections, float valves and overflows must be provided for each cell. Likewise, this would require separate sensors and controls for basin heater systems, if installed.

■IEC premium efficiency motor with a five year warranty enhances the standard five year mechanical equipment warranty of the MD cooling tower.