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7. Cold Weather Operation
NOTICE: Mechanical and operational methods must be employed to protect these products
against damage and/or reduced effectiveness due to possible freeze-up. Please refer to
BaltimoreAircoil.com or contact your local BAC Representative for recommended protection
alternatives.
Inspection & Maintenance
BAC products can be operated at subfreezing ambient temperatures provided proper operating methods are established and
diligently followed.
•
Carry out frequent visual inspections and routine maintenance services during operation in subfreezing weather.
•
Ensure all controls for capacity and freeze protection are set properly and functioning normally.
•
Prevent excessively high-water levels and possible overflow of the basin due to over pumping, clogged strainers, or
make-up valve malfunction.
•
Some unit icing can be expected in very cold weather. Usually this will not affect the operation of the unit. Resolve any
icing conditions that may damage the unit or the supports, impair the system performance, or create a safety hazard.
Fan Section Icing Protection
There are three basic operational methods which can be used to provide the system's required cooling: temperature setting,
fan control, and dry operation. The method of control employed on a given application depends upon the climatic extremes
which are expected, the variations in heat load that will be encountered, and the compatibility of the control system with other
portions of the installation.
In subfreezing ambient temperatures, effective icing control may require a combination of these three methods. Operate each
unit with the highest thermal load it can handle, rather than evenly dividing the total heat load across all cells. During prolonged
cold weather periods, bypass the idle units and drain the basins.
Vertex™ Evaporative Condenser Operation & Maintenance Manual – Cold Weather Operation
Page | 36
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