Delta TM Series Cooling Tower, TM-105312 manual Install an air bleed valve at highest point

Problem	Possible Causes		Corrective Actions
	2.	Airlock.	2.	Install an air bleed valve at highest point
	3.	Unnecessary obstruction of waterflow		of piping, usually at a vertical angle.
		(i.e., partially closed valve).	3.	Remove obstruction.
	4.	Undersized piping.	4.	Increase pipe size.
	5.	Horizontal pipe run too long.	5.	Shorten, if possible.
	6.	Improper hydraulic pipe design.	6.	Correct design.
	7.	Outlet vortex breaker provided.	7.	Remove vortex breaker.
Excessively high water level in tower basin	1.	Make-up valve float set too high.	1.	Readjust float arm.
on closed loop system installations	2.	Valve or float damaged or	2.	Repair or replace.
		malfunctioning.	3.	Reduce pressure or contact Delta for
	3.	Make-up water pressure too high.
				alternate solutions.
Uneven water level in tower basins of multi-	1.	Unbalanced system hydraulics.	1.	A. Install equalizer line with isolation
cell installations				valves between modules.
				C. Adjust inlet water flow to insure equal
				distribution to each cooling tower
				module.
				D. Review outlet header hydraulics and
				correct piping design, if applicable.
				E. Contact Delta for assistance.
	2.	More than one make-up valve	2.	A. Adjust float level settings relative
		operating, and set for different water		To one another.
		levels.		B. Shut-off and or/throttle flow to
				one or more valves.
				C. Installation of equalizers is
				highly recommended.
Excessive water carry over (drift)	1.	Surfaces of top layer of fill damaged	1.	Replace top layer. Protect fill when working
		causing “pooling” of water.		inside tower.
	2.	Eliminator(s) not in place.	2.	Reinstall.
	3.	Damaged eliminator.	3.	Replace.
	4.	Excess water flow.	4.	Reduce water flow or install spray nozzles
				designed for the actual operating flow.
	5.	Orifices in spray nozzles clogged	5.	Install outlet strainer. Clean whole system
		causing improper water dispersement.		and spray nozzles.
	6.	Blockage of fill.	6.	Clean fill.
Premature or excessive corrosion of fan	1.	Excessive drift.	1.	See “ Excessive Water Carry Over (Drift)”
drive components				above.
	2.	Presence of corrosive chemicals in air	2.	Remove source of corrosion or contact Delta
		or water that was not known at time of		for alternative materials, premium coatings
		supply.		or other precautions.

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