13
Basin heaters systems will not prevent the coil from freezing. Unless
some means of freeze prevention is incorporated into your system,
the fluid cooler basin and exposed pipework should be drained at
the beginning of each freezing weather 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:
Fluid cooler systems installed in areas with the possibility of freezing ambient
conditions must incorporate measures to protect the fluid in the heat transfer
coil(s) from freezing and damaging the coils. Industrial inhibited ethylene
and propylene glycol solutions are the best means to protect the coil(s) from
freeze damage. The following table provides the coil volume for each LW fluid
cooler model, per cell.
When the use of industrial antifreeze solutions is not possible, the system must
be operated to meet both of the following conditions at all times.
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 50°F.
If an antifreeze solution is not used and sufficient heat load and/or
flow rate are not available, the coil(s) must be drained immediately.
Automatic drain valves and air vents in the piping to and from the fluid
cooler are necessary to facilitate full and timely drainage. Draining
of the coil during extreme cold conditions should be undertaken in
emergency situations only, and not as part of a routine operating
sequence, as risk of freeze damage is not completely eliminated.
Caution
Note
Caution
operation
Model
Coil Volume
US Gallons
Model
Coil Volume
US Gallons
LW032*B
46
LW064*B
88
LW032*C
46
LW064*C
88
LW032*E
67
LW064*E
129
LW032*F
67
LW064*F
129
LW048*B
69
LW096*B
132
LW048*C
69
LW096*C
132
LW048*E
102
LW096*E
196
LW048*F
102
LW096*F
196
