BAC PCT Series, Operation & Maintenance Manual

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16
W W W . B A L T I M O R E A I R C O I L . C O M . A U
M A R 1 0 8 - 2
Water Distribution System and Heat Transfer Section
The hot water is distributed through a corrosion resistant polyvinyl
chloride (PVC) spray distribution system. The fill and drift eliminators
are also made of PVC, which requires no protection against rot, decay,
rust, or biological attack.
The inspection procedure is as follows:
• Shut off the fan, lock out, and tag out the fan motor, but leave the
system pump running.
• Check to see if the nozzles are all spraying consistently and
producing the spray pattern shown in Figure 9 .
• Clean any nozzles which are clogged. If necessary, the nozzle and/or
branch may be removed for cleaning.
• If required replace damaged or defective nozzles/ grommets -
replacement nozzles & grommets are available through your local
BAC representative.
• The fill should be inspected and cleaned at least quarterly or more
regularly if required by local authorities.
1. To inspect and/or clean remove the access panel.
2. Inspect and clean thoroughly to remove all debris and deposits
such as algae, scale, etc.
3. Repair or replace damaged or defective bundles. Replacement
bundles are available through your local BAC representative.
Heat trace and insulate all exposed water piping including pump piping
below the overflow level, external header cleanout, and make-up water
lines with electrical heater tape.
NOTE: When working on fill section
or above fill section, fill bundle
edges should be protected from
damage by service personnel,
tools or debris by placing a
temporary cover of plywood, or
other suitable material, over the
top of the fill bundles.
Figure 9.
Nozzle Spray Pattern
Louvres and Eliminators
Inspect regularly and remove foreign objects that might impair air
passage. Replace damaged and/or missing sections as necessary.
WARNING: Damaged or missing
drift eliminators will result in
excessive drift from the tower.
This may constitute a hazard
due to biological or chemical
contaminants, including
Legionella, being discharged from
the tower. When such damaged
or missing drift eliminators
are noticed the tower MUST be
stopped and not re-started until
the sections are replaced.