Operation - SPX MARLEY CP User Manual

Note
Caution
4

operation

4— Visually inspect the fill, drift eliminators, air inlet louvers and the distribution
piping and spray nozzles.
5–Check gear motor oil for sludge or water by draining off and testing a sample
as outlined in the manufacturer's Gear Motor IOM Manual. Check gear
motor oil level. Add oil as required. Refer to the Gear Motor IOM Manual
for oil filling procedure and list of recommended lubricants.
6–Rotate fan by hand to be sure of free rotation and ample tip clearance.
7–Test run each fan separately for a short time. Check for excessive vibration
or unusual noise. If either is present, see Troubleshooting Guide on pages
14 and 15 of this manual. Fan must rotate clockwise when viewed from
above. Recheck gear motor oil level.
8–Check functioning of make-up water supply. Make sure the blowdown will
carry the proper amount of water.
Clean the sump screens several times during the first weeks of
operation. After this, clean sump screens weekly.
STARTING FAN–Operate the fan for 30 minutes to permit the gear motor oil
to come up to operating temperature and check the motor load with a watt
meter, or take operating volt and ampere readings and calculate motor hp. Pitch
fans if required to pull correct contract horsepower when circulating design
water rate at design hot water temperature. Refer to the manufacturer's Fan
IOM Manual for instructions. Check tightness of fan blade fasteners after a
brief period of operation.
Entering water temperature in excess of 80°C may result in fill de-
formation.
TOWER PERFORMANCE–Keep the cooling tower clean and water distribu-
tion uniform to obtain continued maximum cooling capacity.
The capacity of a cooling tower to cool water to a given cold water temperature
varies with the wet-bulb temperature and the heat load applied to the cooling
tower. As the wet-bulb temperature drops, the cold water temperature also
drops. However, the cold water temperature does not drop linearly with the
wet-bulb temperature.
A cooling tower will not control heat load. The flow rate of water circulated
through the cooling tower will determine the temperature range of cooling in
conjunction with a given heat load. The hot water and cold water temperatures
will increase with higher heat loads.