Greenheck TSU Base Unit Manual (464441) - Manual (Page 18)

Make-Up Air Unit 18
®
NOTE
The Freeze Temperature is preset to the factory
recommended 45ºF. Steps 9-11 should only
be completed if the Freeze Temperature needs
adjustment.
NOTE
The Freeze Temperature is the temperature at which
the supply solenoid closes and the drain solenoid
opens to drain the supply line, preventing possible
freeze damage. A drain solenoid is required for this
option.
9. Enter Program Mode
Press and hold the
Enter key for three
seconds. The display will
read “Pro” when Program
Mode is active.
10. Adjust the Freeze Temperature
While in Program
Mode, use the Up and
Down keys to navigate
through the Menu
Options until “Frt”
is displayed. Press
the Enter key to access the
selected Menu Option setting.
Use the Up and Down keys to adjust the Freeze
Temperature setting as needed. Press the Enter key to
set the Freeze Temperature and return to the Program
Menu.
Freeze Temperature
Display
NOTE
The enter key must be pressed to save the new freeze
temperature.
Program Mode
Program Mode allows the user to view the Program
Menu and edit the factory default settings. To access
Program Mode and view the Program Menu, press and
hold the Enter key for three seconds. While viewing the
Program Menu, press the Up and Down keys to scroll
through the Menu Options. To view the setting of the
selected Menu Option, press the Enter key. To edit the
setting, press the Up or Down key while viewing the
setting. To save the setting and return to the Program
Menu, press the Enter key. To return to the Program
Menu without saving the change, wait 10 seconds.
To exit Program Mode from the Program Menu, wait
10 seconds.
Operation - Water Wizard™ (optional)
CAUTION
The sump drain line must be clear and draining to a
safe location before using Flow Test Mode.
CAUTION
Be aware of the water level in the sump tank at all
times when using the Flow Test Mode.
WARNING
Changing the default settings will significantly affect
performance. Only change a setting after reading and
understanding this entire manual.
WARNING
The Enter key must be pressed to save any changes
made to a setting.
Light Status
Indicating
Light
On Off
Blinking
Long on, short off
Blinking
Short on, long off
L1
Call for
cooling
No
call for
cooling
Call for cooling.
Outdoor
temperature
lockout.
N/A
L2
Drain
solenoid
open
Drain
solenoid
closed
N/A
Supply solenoid
open. (Drain
solenoid closed).
L3
Cooling
on
Cooling
off
Supply solenoid
locked closed
Flow test
mode active
Drain Mode locks open the drain solenoid and drains
the supply line between the supply solenoid and
the media. To activate Drain Mode simultaneously,
press the Function and Enter keys (L2 will light). To
deactivate Drain Mode and unlock the drain solenoid,
simultaneously press the Function and Enter keys again.
Flow Test Mode - Activating Flow Test Mode opens
the supply solenoid and allows water to pass to the
manual supply valve. To activate Flow Test Mode, press
and hold the Function key for one second (L3 will flash).
To deactivate Flow Test Mode and allow the supply
solenoid to close, press and hold the Function key again
for one second.
Dry Bulb Temperature
The dry bulb temperature is visible on the home screen.
If a number is not visible, wait 15 seconds and use the
Up and Down keys until a number is displayed.
Wet Bulb Temperature
To view the Wet Bulb Temperature, simultaneously press
and hold the Up and Down keys.
Indicating Lights
Three indicating lights are located across the top of the
display to indicate the status of the Water Wizard™.
11. Exit Program Mode
After ten seconds of idle time the controller will exit
Program Mode.
Program Display