4
Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual
one-minute time increments of the ventilation timer allow you
to program the ventilation of your home to fit your schedule.
The ventilation timer allows six programs with each program
having one "on" and one "off" event. A program allows the
user to turn the ventilation on at a certain day and time, then
it allows them to turn the ventilation off at a certain day and
time. Each of these programs can be repeated daily or week-
ly or during a specified block of days. All six of the programs
operate independently of each other. If the timer fails to oper-
ate or operates erratically, check that the control panel
receives 24Vac from the UA-135H. If 24Vac is present at the
control panel, reset the timer by pressing the reset button at
the bottom center of the timer face. The reset button is the
small recessed button with an R beneath it located below the
1...7 and h buttons. Depress the reset button until the dis-
play clears. Release the reset button. The display will reap-
pear as 00:00. Resetting the timer will clear the time and all
program settings. After resetting the timer follow the instruc-
tions below to set the correct time and ventilation programs.
4.5 Setting the Time
First, set the correct time on the timer by sliding the switch in
the upper right hand corner of the timer to the clock symbol.
and pressing the 1...7 (DAY), h (HOUR), and m (MINUTE)
buttons. Remember this timer operates on a 24-hour (military
time) clock.
4.6 Ventilation Schedule
Slide the switch in the upper right hand corner to the program
symbol P. "ON" will appear to the right of the time and the
number "1" will appear in the lower right hand corner of the
display. The "1" and "ON" signify the turn on time for the first
program. Press the 1...7, h and m button to choose the days
of the week for this program. You can choose Mon.-Sun,
Mon.-Fri., Sat-Sun, or any single day of the week. The days
chosen are shown along the top of the display on the ventila-
tion timer. Next press the h button to set the hour for the
start of the ventilation period. Remember this timer operates
on a 24-hour clock (military time). Then press the m button to
set the minutes past the hour to start the ventilation. Now,
with the ventilation start time set; press the I/O button. The
word "OFF" should appear to the right of the time and the
number "1" should remain in the lower right hand corner of
the display. The "1" and "OFF" signify the turn off time for the
first program. Set the turn off time using the 1...7, h and m
buttons in the same way as described above and continue
on to the second through sixth programs. When setting the
ventilation programs, you can return to the current time
display by sliding the switch in the upper right corner of the
timer to RUN. The slide switch must be set to RUN for the
timer to operate its scheduled programs.
4.7 Automatic or Manual Mode
The slide switch in the upper left of the timer is used to
choose between automatic and manual operation. When the
slide switch is set to AUTO mode, the UA-135H will ventilate
when the scheduled programs call for ventilation. When the
slide switch is set to manual (set to hand symbol on the
right), the operation of the timer is controlled by the I/O
button only. Pressing the I/O button will switch the ventilation
timer between ON (detent) and OFF (detent). As you press the
I/O button, "ON" or "OFF" will be displayed to the right of the
time. The "ON" or "OFF" indicates if the ventilation timer is on
or off. The I/O button will manually override scheduled pro-
grams if the timer is in AUTO mode.
4.8 Low Pressure Control
If the low side refrigerant pressure drops to 15 PSIG, the
low-pressure control opens and shuts off the compressor and
impeller fan. It is automatically reset when the pressure rises
to 35 PSIG. Its primary function is to prevent damage to the
compressor. It may also open if the unit is A) installed in a
cool area (below 50°F) or B) installed where it is below 40°F
and then started. Under these conditions, the unit will restart
within several minutes. Until the unit warms up, it may repeat
the cycle several times.
5 (DEH 2000) Digital Control
DEH 2000 Digital Ventilation Timer/Humidity/Fan Control
Installation & Operation Instructions
5.1 Specifications
Model: 4024539
Electrical: 24
VAC
Humidity Range:
20 – 90% RH
Humidity Accuracy:
+/- 4%
Output:
3 Amps 24 VAC
5.2 Operation
5.2A Display
When there is power to the control, the control display
sequence will alternately show the clock, humidity,
temperature, fan status, and fresh air damper status.
The display sequence repeats continually, and is referred to
as “home state”.
Figure 1:
DEH 2000 Digital Display
