Champion 4000 CRLD4, Installation & Operation Manual

Page: 6 / 12

110524-1
6
OPERATION
NOTES:
These coolers may be used without water for ventilation purposes. When outside air is cool (for example, at night) or
when humidity is high the water pump can be turned off.
To eliminate the delivery of hot air when starting the cooler, start the pump only for the first few minutes, then turn on the blower
motor.
THERMOSTAT OPERATION (CONTRACTOR MODEL 4000CRLD4)
Automatic Operation (Cool Mode)
The fan and water pump are controlled automatically to achieve the desired comfort level.
This mode is activated by pressing the ‘Mode’ button until ‘Auto’ is displayed on the LCD. The ‘Mode’ button changes the control
from Off to Auto to Manual and back to Off.
The Set temperature (the target temperature for control) may be altered by repeatedly pressing or holding the ‘Up’ or ‘Down’
buttons. The LCD will display the ‘Set’ rather than ‘Room’ temperature for a short time after pressing the ‘Up’ or ‘Down’ button.
On starting or after the pump has been off for a period of time, the pump will start without the fan to allow the media to absorb
water. This is called Pre-wet and lasts for 2 minutes, indicated by ‘Pre-Wet’ flashing on the LCD. The Pre-Wet cycle can be
bypassed by pressing the ‘Fan’ button and then pressing the ‘Mode’ button until ‘Auto’ is displayed.
The thermostat will cycle the fan setting between High speed, low speed and off depending on room temperature. If the room
temperature drops 2 degrees below the set point temperature, the fan will turn off. At 1 degree above the set point temperature,
the unit will start on low speed. If the room temperature rises to 4 degreees above the set temperature, the fan will change to high
speed and will remain until the room temperature drops to 1 degree above the set point, where it will change to low speed.
The thermostat allows the operator to calibrate the room temperature reading. Pressing the up and down arrows simultaneously
for 5 seconds will enter the calibration mode. A temperature adjust setting of -3 to 3°F can be selected. After no activity for 5
seconds, the thermostat will exit the calibration mode and the room temperature will be adjusted by the selected value.
During automatic operation, the control performs a water purge cycle every 8 or 12 hours of pump operation. This interval can
be toggled between 8 or 12 hours by simultaneously holding the ‘Pump’ and ‘Fan’ buttons for 5 seconds. The selected interval is
displayed for a short time. This action also starts a manual dump cycle.
Manual Operation
The fan speed and pump are set by the user.
To activate the manual mode from the ‘Off’ state, press the ‘Mode’ button until ‘Manual is displayed. If the control is in the ‘Auto’
mode, you can change to manual mode by pressing either the ‘Mode’, ‘Fan’ or ‘Pump’ buttons. Pressing the ‘Fan’ button changes
the fan from High to Low to Off and back to High. Pressing the ‘Pump’ button changes the pump from On to Off and back to On.
The LCD will display ‘Manual’ on the left and the fan and pump settings on the right. The fan speed will be displayed as Fan Hi
or Fan Lo. If neither are displayed the fan is off. The pump status will be displayed by the LCD as ‘Cool’ (if the fan is running)
or ‘Pre-Wet’ (if the fan is off). With the fan and pump both running ‘Cool’ will be displayed. If only the fan is running ‘Vent’ will be
displayed.