12
Ultra-Aire 90H Installer’s & Owner’s Manual
13
Ultra-Aire 90H Installer’s & Owner’s Manual
FOR HVAC INSTALLER AND HOMEOWNER
8. Verify additional optional control operations such as fan interlock
or lockout.
9. Proceed to operation/setting section.
FOR INSTALLER & HOMEOWNER:
5.3 Operation
5.3A Display
• When there is power to the control, the control display will
show the time, day, humidity, and temperature.
• When the control is turned on, the setpoint, fan status,
auto/hold mode, and fresh air vent status is displayed.
• When a key is pressed the display will light.
• The
“TIME”
and
“DAY”
is displayed at the top of
the screen.
• RH and Temperature are displayed in real time.
• An “
O
” before the set point, vent, or fan indicates the unit
is operating the device.
• A flashing “
O
” before the set point, vent, or fan indicates
the unit is in a delay prior to operating the device.
Note: Delay is an intentional factory installed time delay
cycle that is meant to prevent short cycles, extending the
life of the Ultra-Aire. If a delay is encountered,
WAIT 10
MINUTES BEFORE EXPECTING NORMAL OPERATION.
5.3B Setting
During the set-up process, if you make a mistake, simply
continue. You can always go back to adjust the settings. If
you leave the control alone and don’t touch any buttons for
10 seconds, the control will remember any changes made
and return to “home.”
5.3C On/Off Setting
Press the
“ON/OFF”
button to turn the system on or off.
When the system is on, the setpoint, fan status, auto/hold
mode, and fresh air vent status is displayed. In the off
mode, the control will show the time, day, humidity, and
temperature. When the unit is shipped, it is in manual mode.
5.3D Setting Clock Time
1. Press and hold the
“CLOCK”
button. The hour display
will flash. Release the button.
2. Use the
“UP/DOWN RH”
buttons to change the value.
3. Press the
“CLOCK”
button again and the minute display
will flash. Use the RH buttons to change the value.
4. Press the
“CLOCK”
button again and the
“
AM/PM”
display
will flash. Use the RH buttons to toggle the value.
5. Press the
“CLOCK”
button again and the day display will
flash. Use the
“RH”
buttons to change the value.
If the
“CLOCK”
button is pressed again or no button is
pressed for 5 seconds, the display will automatically return to
“home.”
5.3E Setting Relative Humidity Setpoint
The relative humidity setpoint (the average RH that is
maintained) operates the dehumidifier function of the Ultra-
Aire. It has no effect on any other function of the unit. The
control senses the ambient relative humidity of the space in
which it is located.
