Greenheck TSU Base Unit Manual (464441) - Manual (Page 17)

Make-Up Air Unit 17
®
NOTE
Steps 6 through 8 are provided to adjust the minimum
cooling temperature. The minimum cooling is preset
to the factory recommended 75ºF (24ºC). Only adjust
if needed.
NOTE
The inlet air sensor function overrides and shuts down
the evaporative cooler if the outside temperature falls
below the minimum cooling temperature.
8. Exit Program Mode
After ten seconds of idle time the controller will exit
Program Mode.
7. Adjust the Minimum Cooling Temperature
While in the Program
Menu, use the Up and
Down keys to navigate
the Menu Options until
“toF” is displayed.
Press the Enter key
to access the selected Menu
Option setting.
Use the Up and Down keys to adjust the Minimum
Cooling Temperature as needed. Press the Enter key
to save the Minimum Cooling Temperature setting and
return to the Program Menu.
Minimum Cooling
Temperature Display
NOTE
The enter key must be pressed to save the new
minimum cooling temperature.
Start-Up - Water Wizard™ (optional)
NOTE
The recommended water pressure is based on media
width. Refer to the table provided for proper water
pressure settings.
WARNING
Opening the manual supply valve will allow water to
pass to the media. Be sure the sump is safely draining
before opening the manual supply valve.
NOTE
The manual supply valve ships closed and must be
adjusted for proper performance.
Program Display
6. Enter Program Mode
Press and hold the
Enter key for three
seconds. The display will
read “Pro” when Program
Mode is active.
Function
L1 L2 L3
Enter
Up
Down
Water Wizard™ User Interface
Key Function Description
Three-Sided Evaporative Coolers
Housing
Size
Water Pressure (in. wc)
Front Sides
H-50 21 26
1. Open the Solenoid
Confirm that the manual water supply valve is
closed. Press and hold the Function key for
one second. L3 will begin blinking (short on, long off),
indicating that Flow Test Mode is active and the supply
solenoid is open.
2. Set the Water Pressure
With the solenoid open, set the supply water
pressure to the correct setting from the following
tables. Use the manual supply valve to adjust the supply
pressure. A pressure gauge is provided between the
manual supply valve and the media.
3. Break-In Media
Leave the supply solenoid open to saturate and break-in
media for 20 minutes with the blower off.
4. Close Solenoid
With the pressure set, press the Function key for
one second to deactivate Flow Test Mode and
allow the supply solenoid to close.
5. Check Media
Start the cooling cycle and check the media after one
hour of operation. If the media is continuously dry or if
too much water is draining from the sump tank, refer to
Troubleshooting, Water Wizard™.