SPX Cooling Technologies 800 user manual Initial Starting Procedure

Initial Starting Procedure

▲Caution

1— Fill the cold water basin and circulating water system to a level 1/2” (13 mm) below the overflow.

2— Bypass valve should be closed unless start-up is in cold weather. (See Routine Starting Procedure on page 8.)

3— Prime and start the circulating water pumps one at a time. Increase the flow of circulating water gradually to design water rate to avoid surges or water hammer which could damage the distribution piping.

4— When flow has stabilized at or near the design rate, adjust water make-up to maintain the level that the water has pumped down to in the cold water basin. (See Cold Water Collection Basin on page 10.) This should coincide reasonably with the recommended operating water level indicated on the Marley project drawings.

5— Start the fan(s). After 30 minutes operating time, to permit Geareducer oil to come up to operating temperature, check motor load with watt meter, or take operating volt and ampere readings and calculate motor horsepower. Refer to Marley Fan Service Manual for instructions.

If it is necessary to adjust fan pitch to pull correct contract horse- power, measure results when circulating design water rate at design hot water temperature. Horsepower will change with air density. Lock out all electrical service before entering fan area.