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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 2 1 0 - 2
Detailed Component
Maintenance Procedures
Access Door
Louvres and Eliminators
Water Distribution System and
Heat Transfer Section
Figure 9. Nozzle Spray Pattern
Water Distribution System and Heat Transfer Section
Water is distributed through a corrosion resistant polyvinyl chloride
(PVC) spray distribution system. The drift eliminators are made of PVC,
which requires no protection against rot, decay, rust, or biological attack.
The inspection procedure is as follows:
• Shut off the fan and lock out and tag out the fan motor. Turn off
the recirculating pump.
• Remove the door and take out the drift eliminators to allow a clear
view of the spray distribution system and nozzle patterns.
• Start the pump. Check to see if the nozzles are all spraying
consistently and producing the spray pattern shown in Figure 9.
• Clean any nozzles that are clogged. If necessary, the nozzle and
rubber grommet may be removed for cleaning. If additional cleaning
is necessary the branch may be removed for cleaning.
• Inspect the coil surface. Any corrosion, damage, or obstructions
must be corrected.
• The coil is designed for seasonal dry operation followed by seasonal
wet operation, and not for frequent cycling of the spray pump.
Frequent spray pump cycling may lead to excessive scale buildup.
With electrical heater tape, heat trace and insulate all exposed water
piping, including pump piping below the overow level and make-up
water lines.
NOTE: When working on ll section
or above ll section, ll 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 ll bundles.
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