Marley x7 fan d e s i g n e d f or i n d u ce d-d raft cooli n g towe r appli cati on s m2010-1234a i ssued 3/2012 r ead an d u n d e r stan d th i s man ual pr i or to ope rati n g or s e rvi ci n g th i s pr od u ct. U s e r man ual.
2 order no. _______________________________________ trial pitch angle __________________________________ final pitch angle _________________________________ speed-rpm ______________________________________ contract hp _____________________________________ fan components figure 1—typical fan assembly...
3 ➠ fan assembly instructions the following instructions apply to installations having straight bores or tapered output shafts without split taper bushings. It is convenient to preassemble the fan prior to installation on the driving shaft. Marley x7 fans are statically balanced as a complete assemb...
4 figure 3 9—progressively tighten each side of the u-bolt until the blades are barely able to move when twisting the blade. Fan installation instructions 1—be sure motor is locked out. 2—clean the hub bore and driving shaft extension for the full length of the key. 3—insert the key in the keyway. T...
5 adjusting fan blade pitch the trial pitch is the calculated setting for design conditions (water rate , heat load, air density, and brake horsepower). The trial pitch is provided by spx (see page 2). 1–select a position on the fan circumference and rotate each blade to this common location when se...
6 fan maintenance preventative maintenance will prolong useful life and assure continued trouble-free operation. After the first week and subsequently at six month intervals: • torque all hardware to specifications referenced in this manual. • visually inspect the fan for airborne debris damage, con...
7 motor load the corrected horsepower should be close to but not exceed the con- tract horsepower specified by spx. Determine corrected horsepower using the following equation. Actual volts and amperage must be obtained with the fan running and the specified rate of water flowing over the tower afte...
Spx cooling technologies, inc. 7401 w 129 st overland park, kansas usa p: 913 664 7400 f: 913 664 7439 spxcooling@spx.Com spxcooling.Com in the interest of technological progress, all products are subject to design and/or material change without notice issued 3/2012 m2010-1234a copyright © 2012 spx ...
