SPX Cooling Technologies Hexacool Air Cooled Condenser none User Manual page 17

Warning
Caution
Warning
Caution
Operation
Basin heaters systems will not prevent the coil from freezing.
Unless some means of freeze prevention is incorporated into your
system, the tower basin and exposed pipework should be drained at
the beginning of each wintertime shutdown period.
If fluid cooler basin is drained, verify that all basin heaters have been
shut off either by automatic cutoff or disconnect switch.
Protection against Coil Freezing:
Ethylene and propylene glycol solutions are the best means to protect the
coil from freezing. The following table provides the coil volume for each
MC Fluid Cooler model. When the use of industrial antifreeze solutions is
not possible, the system must be operated to meet both of the following
conditions.
1. Maintain sufficient flow rate through the coil.
2. Maintain sufficient heat load on the process fluid. Fluid exiting the
coil must be maintained at or above 8°C. Cycling of the recirculation
pump should not be used to control process temperatures.
Model
MCF7012_081
MCF7012_101
MCF7012_121
MCF7013_081
MCF7013_101
MCF7013_121
MCF7014_081
MCF7014_101
MCF7014_121
MCF7054_081
MCF7054_101
MCF7054_121
Draining the coil is not acceptable as a normal method of freeze
protection—draining promotes corrosion inside the coil tubes. Drain-
ing is acceptable in an emergency if the coil is not protected by an
antifreeze solution.
It is recommended that you discuss your freeze prevention options with
your local Marley sales representative.
Coil Volume
Model
liters
42 MCF7055_081
49 MCF7055_101
61 MCF7055_121
64 MCF7073_081
79 MCF7073_101
95 MCF7073_121
87 MCF7074_081
106 MCF7074_101
129 MCF7074_121
174 MCF7075_081
220 MCF7075_101
261 MCF7075_121
Coil Volume
liters
265
333
401
163
204
246
231
288
344
337
424
507
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