BAC VX Series Operation & Maintenance Manual page 14

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8
W W W . B A L T I M O R E A I R C O I L . C O M . A U
Model Number
VXT-10 TO 135
VXI-S9, 18, 27, 36
VXC-S14 to S135
VXT-150 to 185
VXI-S50
VXC-S150 to S205
VXT-N215 to N535
VXI-S70, 95, 145, 190, 290
VXC-S221 to 265 & VXC-S288 to 1010
VXT-315 to 4800
VXI-S180, 360
VXC-S357 to 1360
VXC-S495 to 1608
VXI-S144, 215, 288, 430
Table 2 - Operating Water Level
The water level in the cold water sump will vary as a function of the
system load (evaporation rate), bleed rate, supply water pressure, and
the quantity of water suspended in the tower during pump operation
plus that contained in the water distribution system, external piping,
and any heat exchangers which could drain to the tower sump when
the circulating pump is shut down. Because the typical winter load is
less than the summer load, the winter evaporation rate is frequently
less than the summer evaporation rate. With this reduced evaporation
rate in the winter, the water level in the cold water sump will
increase unless the float is
readjusted.
Due to these variables the
operating water level should
be checked monthly and the
float adjusted as necessary
to maintain the desired
operating level. The valve
itself should be inspected
annually for leakage and
the valve seat replaced if
necessary.
Operating Level (mm)
measured from the pan (bottom)
327mm
343MM
343mm
394mm
419mm
419mm
432mm
432mm
432mm
457mm
457mm
457mm
356mm
356mm
Figure 1a - Operating Water Level