SPX Cooling Technologies Marley MD specifications Marley / MD CoolingTower / Specifications Base

Marley / MD CoolingTower / Specifications: Base

Specifications Specification Value

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shall be driven through a one-piece multi-groove, solid back V-type belt, sheaves (pulleys), and tapered roller bearings. Bearings shall be rated at an L10 life of 100,000 hours, or greater. Both motor and fan sheaves (pulleys) shall be all cast aluminum to prevent premature corrosion.

6.2Motor(s) shall be ____ kW maximum,

TEFC, variable torque, inverter duty and specially insulated for cooling tower duty. Speed and electrical char- acteristics shall be ______ RPM, single- winding, ___ phase, ____ hertz, ____

volts. Motor nameplate power shall not be exceeded at design operation. TEAO motors are not acceptable.

6.3The complete mechanical equipment assembly for each cell shall be support- ed by a rigid, hot-dip galvanized steel structural support that resists misalign- ment 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 tow- ers 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 contact. The mechanical equipment assembly shall be warranted against any failure caused by defects in materials and workmanship for no less than five (5) years following the date of tower shipment. This warranty shall cover the fan, speed reducer, drive shaft and couplings, and the mechanical equipment support. The electric motor shall carry a manufacturer's warranty of at least one year. The bearing assem- blies and V-belts shall be warranted for

18 months.

sheaves, power band belts and long-life bearings for dependable ser- vice.

TEFC motors offer additional benefits over TEAO motors whose only source of cooling is the flow of air produced by the cooling tower fan. This air rate is not always ideal due to motor position, blockage, etc. TEFC ensures the motor will always be cooled properly.

Unless otherwise specified, motor speed will be 1500 RPM in on stan- dard models. Low noise models will use motor speeds appropriate for the specific model. If you prefer the operating flexibility of two-speed operation, please specify two-speed, single-winding motors which offer full and half speeds for maximum energy savings. Incidentally, two speed motors are a far better choice than separate “pony” motors which simply double the problems indicated above and induce parasitic loads during operation for lower than nameplate efficiency.

The value of a 5 year mechanical equipment warranty speaks for itself. Except for the motor, virtually all of the mechanical equipment on a Marley tower is designed and manufactured by SPX Cooling Technologies. Cooling tower vendors who purchase commercial fans, gear reducers, driveshafts, etc. may require that you deal directly with those commercial suppliers for warranty satisfaction.