BAC RC Series - Cold Water Basin

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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
WARNING: Openings and/or
submerged obstructions may exist
in the bottom of the cold water
basin. Use caution when walking
inside this equipment.
WARNING: Do not use acid to
clean the strainers.
Cold Water Basin
As water circulating through the cooling tower is cooled, it collects in the
cold water basin and passes through the suction strainer into the system.
Water Levels
Model Number At Overow Level (mm) At Operating Level (mm)
All RC models (except RC*-1111) 443 343
RC*-1111 548 448
Table 1. Cold Water Basin Water Levels
• The values shown in Table 1 are relative to the base of the unit.
• The make-up valve controls the operating level, which is maintained
at the levels shown in Table 1.
• The operating water level in the cold water basin will vary with
system thermal load (evaporation rate), the bleed rate employed,
and the make-up water supply pressure.
• Check the operating water level monthly, and readjust the oat
when necessary to maintain the recommended operating level.
• Consult “Water Level Control” on Page 20 for information on how to
set and maintain basin operating level.
Inspection & Maintenance
• Inspect the cold water basin regularly. Remove trash or debris
accumulated in the basin or on the strainer.
• Quarterly or more often if necessary, drain, clean, and ush the
entire cold water basin with fresh water. This will remove the
sediment, which can collect in the basin during operation. If not
removed, sediment can become corrosive and cause deterioration of
the basin as well as be a potential area for biological growth.
• When ushing the basin, leave the strainer in place to prevent the
sediment from re-entering the system.
• Remove the strainer after the basin has been ushed.
• Clean and replace the strainer before relling the basin with
fresh water.
• Adjust the oat to maintain the design operating level. See Table 1.
Figure 2. Water Operating Level