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IMPORTANT:

Completely read these instructions and warnings prior 

to installing and operating your Kasco equipment.

This portable timer is designed to 

CONTROL

 the 

connected equipment only. 

THIS SWITCH IS NOT TO 

BE USED AS A POWER DISCONNECT! 

Unplug The 

C-20 and the equipment it controls before servicing.  

Mount at least 5 ft. from open water.  Refer to your  

de-icer owner’s manual for additional safety and  

de-icer installation/operation instructions.  The C-20  

is designed to operate only ONE Kasco de-icer.

INSTALLATION:

The C-20 must be mounted upright on a vertical 

surface or post. For the most accurate operation 

do not mount in direct sunlight. Mount close to an 

outdoor receptacle to allow slack in the C-20 power 

cord. Mount high enough above ground level for easy 

use and to prevent ground moisture/flooding from 

damaging the C-20. Use corrosion resistant screws 

to mount the C-20. One screw for the top hanger slot 

and one for the bottom mounting tab to secure the 

C-20. Insert your de-icer power cord through the hole 

in the bottom of the C-20 enclosure. Allow enough 

slack to prevent strain on the plug. You may also need 

to provide a tether (another point to hold the cord 

in place) to prevent your de-icer power cord from 

slipping into the water. You can install the closure 

plate provided by snapping into place from the outside 

of the enclosure hole. Note: Install closure plate 

with 3R (outdoor use) rating to maintain enclosure 

environmental integrity.

UNDER NO CIRCUMSTANCES SHOULD 

ANYONE ENTER THE WATER WHEN A UNIT 

IS IN OPERATION. 

SETTING THE TIMER & THERMOSTAT:

The C-20 energizes your De-icer only when both the 

timer and thermostat turn on. The Indicator light will 

illuminate when both timer and thermostat are on  

(de-icer outlet is energized).  

Timer Thermostat De-icer

OFF

OFF

= OFF

ON

OFF

= OFF

OFF

ON

= OFF

ON

ON

= ON

TIMER SETTING:

1.  Push each tripper to the outer ring for every 15 

minutes of activation time. Note: For most efficient 

and effective De-Icing, do not set the timer in 

segments of less than one hour activation time. (Set 

4 trippers on together for 1 hour minimum.)

2.  Turn timer dial clockwise until correct time-of-day 

is aligned with “TIME NOW” arrow.

3.  Set AUTO/ON switch to AUTO for automatic timer 

control. 

Note: Setting the timer switch to ON will allow the 

de-icer to operate by the thermostat only (timer output 

is always on).

THERMOSTAT SETTING:

Simply set the thermostat dial to the temperature you 

want the de-icer to turn on. (Remember the timer must 

also be set to ON or AUTO for the de-icer to energize.) 

The thermostat has a 6°F ON/OFF differential. This 

differential helps prevent short cycling of the de-icer.  

Set the thermostat to the desired ON temperature and it 

will shut off approximately 6°F above the ON setting.  

Note: The C-20 control must acclimate to the outdoor 

ambient temperature for proper operation. Allow 

at least 1 hour for the C-20 to adjust to ambient 

temperature.

OPERATING RECOMMENDATIONS:

Use the following tips and suggestions to assist in 

customizing your settings for local conditions.

•  De-icers will create small localized currents the 

longer they run. Fewer and longer operation cycles 

will prove to be more effective than more frequent 

and shorter operating cycles.

•  Fresh water freezes at 32°F, salt water at 28°F, and 

  Kasco C-20 Portable Timer & Temperature Control

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