Drift Eliminators; Pressurized Water Distribution Systems - EVAPCO ATC-E Operation And Maintenance Instruction Manual

Operation and Maintenance Instructions

Drift Eliminators

Check the drift eliminators quarterly to make sure the drift eliminators are still in the correct position and not clogged by any
debris .
If required after inspection, drift eliminators must be removed, cleaned and reinstalled correctly .
On forced draft models, the worker must use personal precautions and adequate safety measures against the risk of a fall, in
accordance with local regulations . Remove one or two eliminator sections from the top of the unit, protect the coil by use of a
hard board before entering the unit and walking on the coil . Never walk on the eliminators! Once on the coil, the remaining drift
eliminators can be removed .
On induced draft models, lifting handles are provided along the top layer of eliminators . Remove one or two eliminator sections,
protect the coil by use of a hard board before entering the unit and walking on the coil . Never walk on the eliminators! Once on the
coil, the remaining drift eliminators can be easily removed through the access door .

Pressurized Water Distribution Systems

Check the water distribution system monthly to make sure it is operating properly . Always check the spray system with the pump
on and the fans off . On forced draft models, remove one or two eliminator sections from the top of the unit and observe the
operation of the water distribution system . On induced draft models, lifting handles are provided along the top layer of eliminators .
Eliminators can be easily removed from the access door and the distribution system observed . The diffusers are essentially non-
clogging and should seldom need cleaning or maintenance .
If the water diffusers are not functioning properly, it is a sign that the pan or system strainer has not been working properly and
that foreign matter or dirt has accumulated in the water distribution pipes . The nozzles can be cleared by taking a small pointed
probed and moving it rapidly back and forth in the diffuser opening .
If an extreme build-up of dirt or foreign matter occurs, remove the end cap in each branch to flush the debris from the header pipe .
The branches or header can be removed for cleaning, but do so only if necessary . Check the strainer in the pan to make sure it is
in good condition and positioned properly so that cavitation or air entrainment does not occur .
All Evaporative Condensers and Closed Circuit Coolers, except the ESWA Closed Circuit Cooler, are supplied with ZM II spray
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nozzles as standard . The ZM II spray nozzles do not need to be oriented a specific way to achieve proper coil coverage .
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Figure 13 shows the proper spacing of the ZM II spray nozzles .
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Figure 13 – ZM II Spray Nozzle Orientation
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All Coil Products except the ESWA
For the ESWA, wide orifice water diffusers are supplied . When inspecting and cleaning the water distribution system, always
check that the orientation of the water diffusers is correct as shown in Figure 14 .
Figure 14 – Proper Water Diffuser Orientation (2A Nozzles) ESWA Models
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