Operating Evaporative-Condensers in Extreme Winter Conditions.

[US Iceman]

... when the air temperature falls below 25 f the water pumps lock out until the air temp rises above 28 f so far I have not had any ice related issues.

I believe it is better to have the pumps ON and the fans OFF in the temperatures described above. These are not extreme temperatures by any means.

I would not cycle the pumps for head pressure control especially in these moderate or warmer temperatures as you risk increased scale formation on the condenser coil.

[Segei]

I believe it is better to have the pumps ON and the fans OFF in the temperatures described above. These are not extreme temperatures by any means.

I would not cycle the pumps for head pressure control especially in these moderate or warmer temperatures as you risk increased scale formation on the condenser coil.

Sometimes, axial fan blades can be frozen at sub zero temperatures.