Cold Weather Operation

　?An alternative method of freeze protection involves the use of an auxiliary sump tank and spray water recirculating pump，located in a heated indoor space． Water drains from the condenser basin to the remote sump，and when the pump is shut off，the water remains in the indoor remote sump．The tank(supplied by others)must be sized to accommodate water in suspension in the condenser(s) plus the water in supply and return piping．Remote pumps (supplied by others)must be selected for the required flow at a total head which includes the vertical lift，pipe friction，plus 7.0 kPa? at the CXV water inlet A valve should be installed in the condenser water supply line to permit adjustment and maintain pressure below 70 kPa at the CXV water inlet．