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Maintenance
Distribution System Maintenance
To keep your MD cooling tower operating at peak performance, it may be
necessary to clear the spray system of debris or sediment. To access the
spray system, remove the drift eliminators as explained in the previous
section. Observe the spray system with full ow on the unit. Each nozzle
should produce a cone pattern spray which overlaps the adjacent nozzle
patterns—see image.
If a nozzle appears clogged or is not producing a cone patter, remove the
nozzle and clean all surfaces. To remove the nozzle, pull down sharply on
the plastic component, leaving the rubber grommet seated in the PVC pipe.
Inspect the nozzle for cleanliness or broken pieces. Each nozzle should
have a turbulator inside the outer shell—see image. If the nozzle appears
broken or damaged, consult your Marley representative for replacement
parts. Insert the nozzles by pressing it
back into place inside the rubber grom-
met. It may be necessary to wet the nozzle
and grommet to facilitate assembly.
It may also be necessary to remove an
entire branch arm from the spray system.
Each arm is held in place with a retention
strap bolted to the branch arm supports.
Remove the bolts attaching the strap to
the support and pull sharply on the branch
arm to disengage from the header box.
It may be necessary to rotate the branch