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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
Model
Coil Volume
US Gallons
Model
Coil Volume
US Gallons
MHF702__061 65 MHF705__061 235
MHF702__081 85 MHF705__081 315
MHF702__101 105 MHF705__101 390
MHF702__121 125 MHF705__121 465
MHF702__062 75 MHF705__062 285
MHF702__082 100 MHF705__082 380
MHF702__102 120 MHF705__102 470
MHF702__122 150 MHF705__122 565
MHF703__061 85 MHF706__061 390
MHF703__081 115 MHF706__081 500
MHF703__101 140 MHF706__101 610
MHF703__121 170 MHF706__121 725
MHF703__062 100 MHF706__062 475
MHF703__082 130 MHF706__082 610
MHF703__102 165 MHF706__102 750
MHF703__122 200 MHF706__122 885
MHF704__061 160 MHF707__061 450
MHF704__081 210 MHF707__081 580
MHF704__101 260 MHF707__101 710
MHF704__121 310 MHF707__121 840
MHF704__062 190 MHF707__062 570
MHF704__082 250 MHF707__082 740
MHF704__102 315 MHF707__102 905
MHF704__122 375 MHF707__122 1071
Caution