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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/looding 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 eficient 

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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