SPX Cooling Technologies Fluid Cooler Marley MC - Manual (Page 17)

17
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 45°F. Cycling of the recirculation
pump should not be used to control process temperatures.
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.
Operation
Warning
Model
Coil Volume
US Gallons
Model
Coil Volume
US Gallons
MCF7012_081 11 MCF7055_081 70
MCF7012_101 13 MCF7055_101 88
MCF7012_121 16 MCF7055_121 106
MCF7013_081 17 MCF7073_081 43
MCF7013_101 21 MCF7073_101 54
MCF7013_121 25 MCF7073_121 65
MCF7014_081 23 MCF7074_081 61
MCF7014_101 28 MCF7074_101 76
MCF7014_121 34 MCF7074_121 91
MCF7054_081 46 MCF7075_081 89
MCF7054_101 58 MCF7075_101 112
MCF7054_121 69 MCF7075_121 134
Caution
Caution
Warning