BLOW DOWN
In case of a continuous blow down with a metering valve in the bleed line, ensure that the valve is unobstructed
and that blow down water can drain freely. Measure the blow down flow rate by recording the time needed to fill a
given volume.
For automatic blow down using conductivity control, ensure that the conductivity probe is clean and that the blow
down solenoid valve is operational. Unless you have a specific adjustment procedure, your water treatment
company should check and adjust set points.
SUMP HEATER PACKAGE
Sump heaters must only operate in the winter to prevent the sump water from freezing, when the water pump(s)
and the fan(s) are shut off.
Under no circumstances should sump heaters operate at other times as they could potentially heat the water to
temperature levels, which are favourable to bacteriological growth. Ensure every six months the heater thermostat
is properly set and clean. Also ensure that control and safety devices, such as low level cut out switches, are
operational, clean and properly incorporated into the control circuit.
CAUTION
Sump heaters can be hot.
BELT TENSIONING
Belt tensioning can be adjusted by changing the position of the fan motor(s) by rotating the motor base adjustment
screw, which extends through the bottom frame angle.
Check belt tension as follows:
1. Shut off fan(s).
2. Rotate the fan sheave half a turn to evenly distribute the tension in the belt before measuring.
3. Check belt tension by verifying both following conditions.
- The deflection amounts 10 mm / m free belt length (see figure below).
- The deflection force required is between the minimum and maximum values given in the table below.
CAUTION
Fan has to be blocked while replacing belts.
Fan belt check and adjustment
W W W . B A L T I M O R E A I R C O I L . E U
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