Baltimore Aircoil Company Trillium Series Operating And Maintenance Instructions Manual
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Contents
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W W W . B A L T I M O R E A I R C O I L . E UCOLD WEATHER OPERATIONSAbout cold weather operationBAC cooling equipment can be operated in sub freezing ambient conditions provided the proper measures aretaken. Listed below are general guidelines which should be followed to minimize the possibility of coil freeze-up.As these guidelines may not include all aspects of the anticipated operation scheme, system designer andoperator must thoroughly review the system, location of the equipment, controls and accessories to ensure reliableoperation at all times.Protection against coil freezingThe best protection is the use of glycol or other anti freeze solutions in appropriate concentrations. The use of suchsolutions influences the thermal performance of the cooler and this should be taken into account, when selectingthe model(s). The table below indicates the freeze protection range for various ethylene glycol concentrations (%by volume).% Ethylene Freeze protection20% -10°C30% -16°C40% -25°C50% -39°CFreeze protection of ethylene glycol solutionsGlycol systems require specific inhibitors compatible with the materials of construction they come intocontact with. These inhibitors generally come pre-mixed with the glycol additive for the cooling circuit.If the process load is extremely light or shut off, it may be necessary to apply an auxiliary heat load during freezingconditions. Consult your local BAC Balticare representative for advice.A full coil drain of the heat exchangers is not possible and as such, this method cannot be relied upon toprotect fluid coolers operating under ambient temperatures that could drop below freezing point, fromdamage to the coil.12DFCV-AD-EC44 Cold weather operations4 Cold weather operations |
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