18
maintenance
Intermittent Freezing Weather Operation:
If periods of shutdown (nights, weekends, etc.) occur during freezing weather,
measures must be taken to prevent the water in the cold water basin—and all
exposed pipework—from freezing. Several methods are used to combat this,
including automatic basin heater systems available from Marley.
Unless some means of freeze prevention is incorporated into your
system, the tower basin and exposed pipework should be drained
at the beginning of each wintertime shutdown period.
If tower basin is drained, verify that all basin heaters have been shut
off either by automatic cutoff or disconnect switch.
Seasonal Shutdown Instructions
When the system is to be shut down for an extended period of time, it is
recommended that the entire system (cooling tower, system piping, heat
exchangers, etc.) be drained. Leave the basin drain open.
During shutdown, follow recommendations in the
Cooling Tower Inspection
and Maintenance
section of this manual before attempting repairs. Apply
protective coating as required to all metal parts. Pay particular attention to
bearing housing supports.
Fan Shaft Bearing Housing:
•
At shutdown, check the oil level in the oil cup.
•
At start of new operating season, operate until the oil is warm—drain and
refill. Use ISO 100 (SAE 30) weight oil.
• Bearing housing must be refilled at the point where the oil line from the
oil reservoir cup connects to the bearing housing. Attach oil line and fill
line and oil cup. Fan guard will have to be removed to change oil. Each
month check the oil level at the oil cup.
Caution
Warning
