Timing & Cooler Functions; Start Up; Pre-Wet; Programmable Wall Control Models In Auto Mode - Kaden KC17 Installer Manual

Kaden Installer's Manual
Evaporative Air Coolers
9. TIMING & COOLER FUNCTIONS

9.1 START UP

Kaden Cooler with Dump Valve fitted will have a 15 second delay on start up.
If the Cooler has been OFF for longer than 60 minutes the tank will require refilling. Allow approximately 3-5
minutes depending on the water pressure.

9.2 PRE-WET

The Cooler has been pre-programmed to automatically saturate the filter pads when the pump is turned ON.
Pre-wet is the process of running the pump and wetting the pads without the fan operating ensuring full pad
saturation and optimum cooling potential when the fan starts.
Between 2 and 10 minutes
Longer than 10 minutes
Longer than 60 minutes

9.3 PROGRAMMABLE WALL CONTROL MODELS IN AUTO MODE

These models operate similar to the Manual wall control models but in auto mode the Pre-wet operates slightly
differently.
If the Cooler has been OFF for longer than 15 minutes it will begin with a 2 minute Pre-wet, then turn OFF the
pump and start the fan.
Depending on the room conditions and the wall control setting the Cooler may perform another Pre-Wet (as
described previously) when the pump is turned ON again, forcing the fan to turn OFF for that period.

9.4 TANK WATER QUALITY AND REPLENISHMENT DURING OPERATION

During the Cooler's operation with the pump operating, the Cooler will be evaporating water from the tank and
automatically refilling itself.
Cooler units will periodically, after a specified number of tank refills, flush out the tank (discharging water from the
drain outlet for approximately 1 minute) without stopping the Cooler.
How frequently this flush occurs will vary according to local water conditions and the rate of evaporation.

9.5 SHUT-DOWN TIMES

When the Cooler is turned OFF at the end of use, the controls are programmed to wait 60 minutes before
commencing Shut-down.
This Shut-down procedure starts with draining the tank (approximately 60 seconds). Then a wash cycle is performed
to clean the tank for approximately 30 seconds.
16
Pump Off Time
Less Than 2 minutes
Pre-wet Time
No Pre-wet
Pre-wet 1 minute
Pre-wet 4 minutes
Tank has to be filled, therefore total time
including Pre-wet is 5 to 7 minutes