Therma Stor Products Group Focus 135h User Manual

TM  
Issue 01  
LLC  
Owners Manual  
Ultra-Aire 135H Air Purifying Dehumidifier  
FILTRATION  
The Ultra-Aire 135H dehumidifier performs multiple functions in  
a compact enclosure; high-capacity dehumidification, fresh air  
ventilation, and is filtration ready.  
Dehumidification  
The highly efficient Ultra-Aire APD UA-135H dehumidifier  
utilizes refrigeration to cool the incoming air stream below  
its dew point. This cooled and drier air is used to pre-cool the  
incoming air stream resulting in up to a 200 percent increase  
in overall efficiency. After the pre-cooling stage the processed  
air is reheated by passing through the condenser coil. The  
heat removed by the evaporator coil is returned to the air  
stream, resulting in an overall temperature increase from the  
incoming air.  
Fresh Air Ventilation (optional)  
Fresh outdoor air is ducted to the unit via a 6” round duct. This  
provides desired air changes to dilute pollutants and maintain  
high oxygen content in the air. The amount of fresh air ventilation  
can be regulated by a variety of controls.  
Air Filtration  
The UA-135H includes air filtration to improve the indoor air  
quality of your living/working space. MERV-8 media is standard.  
An optional second MERV-14 deep pleated media filter is  
Figure 1: Ultra-Aire 135H (Package D)  
available for optimum air filtration to reduce airborne particles.  
Features and Benefits  
Therma-Stor LLC announces the introduction of the Ultra-Aire Model 135H Air  
Purifying Dehumidifier, a ventilating dehumidifier designed to provide ultimate  
indoor air quality. The Ultra-Aire provides the three key components of healthy  
indoor air: fresh air ventilation, particulate filtration and humidity control. At the  
heart of the 135H is a high capacity, energy efficient dehumidifier capable of  
removing over 17 gallons of water per day (at 80°F, 60% relative humidity).  
while using only 12 amps of electricity (120V). This allows the unit to maintain  
indoor humidity levels below 50%, the level widely recognized as critical for  
controlling mold, mildew and dust mite populations.  
Dehumidification  
Fresh Air Ventilation  
Compact Size  
Remote Filter Box  
Figure 2: Features and Benefits  
© Copyright Therma-Stor LLC  
1
4.1 Humidity/Fan Control Panel WITHOUT Fresh Air  
Ventilation or Damper  
4.1D DEH 2000 Digital Controller WITH Fresh Air AND Damper  
Refer to Section 5.  
The humidity/fan control panel automatically controls the  
humidity of the living space. The humidity/fan control panel  
contains an adjustable humidity control and a fan switch.  
The panel has a cover that must remain open to the air within  
the living space for accurate humidity sensing. Position the  
fan switch ON when the home is occupied. This filters and  
circulates air throughout the home. For humidity control  
operation refer to section 4.2.  
4.1E DEH 2000 Digital Controller WITHOUT Fresh Air  
Refer to Sections 5 through Section 5.2G only.  
4.2 Humidity Control Adjustment  
Set the humidity control to the desired humidity level for the  
home. Turning the knob clockwise results in a drier setting.  
See the back of the control panel cover for set points. The  
dehumidifier will run continuously until the relative humidity  
(RH) is reduced to the humidity control dial setting. Setting  
the humidity control to lower RH levels will NOT increase the  
unit's dehumidification rate; the unit will simply run longer to  
reduce the area's RH to the setting. The UA-135H unit (and  
refrigerant-based dehumidifiers in general) will reduce a  
warm space's RH to a lower level than that of a cool space.  
It is therefore pointless to set the humidity control to exces-  
sively low levels in cool rooms; doing so will result in long  
periods of ineffective dehumidifier run time. Settings below  
45% are not recommended.  
Figure 1: Humidity/Fan  
Control Panel  
4.1A Humidity/Fan Control Panel WITH Fresh Air  
Ventilation and WITHOUT Damper  
The humidity/fan control panel automatically controls the  
humidity of the living space. The humidity/fan control panel  
contains an adjustable humidity control and a fan switch.  
The panel has a cover that must remain open to the air within  
the living space for accurate humidity sensing. Position the  
fan switch “ON” when the home is occupied. This filters  
and circulates air throughout the home. Outside air is  
introduced whenever fan is “ON.” Manual operation of fan  
filter switch controls outside air and ventilation. Since the  
fan operates whenever the UA-135H is dehumidifying outside  
air will be introduced. For humidity control operation refer to  
section 4.2.  
Figure 3: Humidity Control  
Adjustment Knob  
4.3 Fan/Filter Switch  
Turning ON the fan/filter switch will cause the UA-135H  
impeller fan to run continuously, whether the UA-135H is  
dehumidifying or not. This function is desirable if the unit is  
used for air circulation and filtration to achieve maximum  
indoor air quality. When the switch is ON; air will be constant-  
ly filtered through the UA-135H and circulated throughout the  
house. When the switch is OFF the impeller fan will operate  
only when the humidity control calls for dehumidification or  
when the ventilation timer calls for ventilation.  
4.1B Humidity/Fan Control Panel WITH Fresh Air  
Ventilation AND Damper  
MIn this configuration, a motorized damper has been  
installed in the fresh air duct. When the fan/filter switch is  
in the “OFF” position, the damper is closed. The UA-135H will  
then circulate and dehumidify air to provide humidity control.  
Figure 4: Fan/Filter Switch  
When the fan/filter switch is in the “ON” position, the  
motorized damper will open and the fan will run, introducing  
outside air. The unit may or may not be dehumidifying in the  
ventilation mode, depending on the humidity control setting.  
See Section 4.2 for humidity control operation.  
4.4 Ventilation Timer  
The ventilation timer controls the impeller fan and the motor-  
ized fresh air damper. When the ventilation timer is activated,  
the UA-135H will circulate the indoor air, and bring in fresh  
air from outside. The ventilation timer should be set for the  
required ventilation of the residence. The home should be  
ventilated with fresh air as suggested by applicable codes  
and standards.The ventilation timer is an electronic timer  
that displays the current time. This timer has battery backup,  
so it will not require resetting after a power outage. Following  
a prolonged power outage the display of the timer will flash  
on and off indicating a power outage has occurred. The  
4.1C Ventilation Timer and Humidity Control WITH Fresh  
Air AND Motorized Damper  
Refer to sections 4.2 through 4.7.  
Figure 2: Ventilation Timer  
and Humidity Control Panel  
Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual  
3
one-minute time increments of the ventilation timer allow you  
to program the ventilation of your home to fit your schedule.  
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.  
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.  
4.8 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.  
4.5 Setting the Time  
5 (DEH 2000) Digital Control  
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.  
DEH 2000 Digital Ventilation Timer/Humidity/Fan Control  
Installation & Operation Instructions  
5.1 Specifications  
4.6 Ventilation Schedule  
Model:  
Electrical:  
Humidity Range:  
Humidity Accuracy:  
Output:  
4024539  
24 VAC  
20 – 90% RH  
+/- 4%  
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.  
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”.  
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  
Figure 1: DEH 2000 Digital Display  
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Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual  
• The word “CLOCK” appears at the top of the display during  
the clock display, along with the day and time.  
5.2D Setting Clock Time  
1. Push “CLOCK” button. The hour display will flash, use the  
“SET” + or – buttons to adjust hour. Notice the a.m./p.m.  
display.  
• The word “HUMIDITY” appears during the humidity display,  
with the current setpoint on the left, and the ambient RH  
on the right.  
• The word “TEMP” appears as the unit displays the current  
temperature.  
Figure 4: Fan Setting  
• The fan status display is indicated by a capitol “F”. “OF”  
indicates fan off status, “on” indicates fan on status.  
2. Push “CLOCK” button again. The minute display will flash.  
Use the “+,–” buttons to adjust to the proper time.  
3. Push “CLOCK” button again. The day display will flash. Use  
the “+,–” buttons to select the proper day.  
• The damper display is indicated by a “d” with the same  
on/off status indicators as the temperature.  
4. Push “CLOCK” button again. The AM/PM display will flash.  
Verify AM/PM setting is correct.  
5. Push “CLOCK” button again, or wait a few seconds for the  
display to stop flashing. The time is now set.  
• The ventilation program is displayed along the bottom of  
the display during the clock, humidity, and temperature dis-  
plays only when the damper operation is set to the pro-  
grammed setting “Pr”.  
5.2E Setting Relative Humidity Setpoint  
5.2B Setting  
The relative humidity setpoint operates the dehumidifier  
function of the Ultra-Aire. It has no effect on any other func-  
tion of the unit. The control senses the ambient relative  
humidity of the space in which it is located. The ambient con-  
dition is displayed on the right in the relative humidity display  
sequence, under the word “HUMIDITY”. The current setpoint  
is displayed on the left, under the word “SET”.  
During the set-up process, if you make a mistake, 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 con-  
trol will remember any changes made and return to “home  
state.”  
5.2C On/Off Setting  
Press the “ON/OFF” button to turn the system on or off.  
When the system is on, the green indicator will be lit. In the  
off mode, the controller continues the regular display  
sequence and indicates current time, temperature, and  
relative humidity. It also displays the status of the fan and  
damper as if the control were on, but the fan and damper will  
not operate unless the control is on and the green indicator  
is lit. Setup can be done with the control either on or off.  
Figure 3: DEH 2000 Clock DIsplay  
If the setpoint is equal to or greater than the current ambient  
condition, the space does not need to be dried, so the dehu-  
midifier function will be off. Example: Setpoint: 50% RH  
Current condition 45% RH = Dehumidifier off, red “DEHU”  
indicator not lit.  
On/Off  
Program  
Clock  
If the setpoint is less than the ambient condition, the  
dehumidifier will be on, and the red “DEHU” indicator will be  
lit. The space is more humid than the setpoint, so the con-  
troller operates the dehumidifier to dry the space. Example:  
Setpoint: 50% RH Current condition: 55% RH = Dehumidifier  
on, red “DEHU” indicator lit.  
Fan  
Damper  
Hum  
To set the relative humidity setpoint, press the “HUM” button.  
The display will show the “HUMIDITY” display, and the word  
“SET” will flash. Use the “SET” + or – buttons to adjust the  
relative humidity setpoint as desired. Therma-Stor Products  
recommends relative humidity levels of 45% in the summer,  
and lower levels in the winter. It is not recommended the  
humidity setpoint be set below 35%. In order to dry the home  
in the winter in a cold climate, use the ventilation function of  
the system rather than the dehumidifier function.  
Figure 2: DEH 2000 User Panel  
Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual  
5
To select damper operation:  
5.2F Fan Setting and Operation  
Use the “FAN” button to adjust the fan operation. There are 3  
choices for fan operation: “on”, “off” (denoted by “OF”), or  
program (denoted by “Pr”). To set operation,  
1. Press the “DAMPER” button. The letter “d” will appear on  
the display, along with the current mode setting.  
1. Press the “FAN” button. The display will indicate the cur-  
rent fan setting.  
2. Use the “SET” + or – buttons to adjust fan operation (“on”,  
“OF”’ or “Pr”). Press the “FAN” button again or leave the  
unit alone for 10 seconds to return to home state.  
2. Use the “SET” + or – buttons to adjust the fan setting to  
the desired mode (“on”, “OF”, or “Pr”).  
3. Press the “DAMPER” button again or leave the control  
alone for 10 seconds to select the indicated damper mode  
and return to the home state.  
Figure 5: Setting Fan  
Damper On  
Damper Off  
Damper Program  
Figure 6: Setting Damper  
5.2G Fan On Fan Off Fan Program  
The fan display reading in the normal display sequence does  
not indicate the current fan setting, it indicates the current  
fan status, and will always read either on or off. With the fan  
in the “on” mode, the fan will run continuously. This does  
not effect the dehumidification functions of the system. In  
other words, the system may or may not be ventilating or  
dehumidifying while the fan is running. Common reasons  
for operating the fan continuously are continuous filtration  
and air recirculation. With the fan in the “off” or “program”  
mode, the fan will operate only when needed by other  
functions of the system. The fan will remain off unless the  
system is dehumidifying and/or ventilating. The fan always  
runs during dehumidification, it also always runs during  
ventilation. To completely turn the system off, use the  
“ON/OFF” button as described earlier.  
5.2I Intermittent or Programmed Ventilation  
With the damper in program mode (denoted by “Pr”  
when setting the damper operation) the system will operate  
the ventilation function according to the current ventilation  
program.  
There are 4 programs available for ventilation Monday  
through Friday. There are also 4 programs for Saturday and 4  
programs for Sunday. No other choice of days is available.  
Each program to be used has an “on event” called “START”  
which brings the ventilation function on, and an “off event”  
called “STOP” which turns the function off. Each START and  
STOP must be entered in to the controller.  
5.2H Damper Operation and Setting (Ventilation)  
The damper setting controls the ventilation function of the  
system. It has no control over the dehumidification function.  
In order to provide ventilation, the damper must be open  
(“on”) and the fan must be running. The controller takes  
care of these two functions automatically, so whenever the  
damper is open (“on”), the fan is running.  
Figure 7: Ventilation Programming  
This is true even if the fan has been set to the “off” mode.  
The ventilation indicator “..” will be lit whenever the unit is  
ventilating  
To set or adjust the ventilation program:  
1. Press the “PROG” button two times. The display will indi-  
cate “Program 1/start” at the bottom, and the hour display  
will flash.  
2. Use the “SET” + or – button to adjust the hour for the  
Program 1 start time. Be sure to pay attention to the  
am/pm setting.  
3. Press the “PROG” button again. The display will indicate  
“Program 1/start” at the bottom, and now the minute dis-  
play will flash.  
There are three damper operation modes, “on”, “off”  
(denoted by “OF”), and program (denoted by “”Pr”). With the  
damper in the “on” mode, the damper will be open and the  
fan of the system will be operating in order to introduce fresh  
air into the space. Use this mode for continuous fresh air  
ventilation. The fan is always on when the damper is open.  
When in “off” mode, the damper will not open and the sys-  
tem will not ventilate.  
4. Use the “SET” + or – buttons to adjust to the desired  
minute setting.  
5. Press the “PROG” button again to move on to the  
“Program 1/stop” event. The display will indicate “Program  
1/stop” at the bottom, and the hour display will flash.  
When in the “program” mode, the control will operate the  
damper and fan (ventilate) according to the programmed  
ventilation schedule (see the section referring to  
programming the ventilation schedule).  
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Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual  
6. Use the “SET” + or – button to adjust the hour for the  
Program 1 stop time. Be sure to pay attention to the  
am/pm setting.  
7. Press the “PROG” button again. The display will indicate  
“Program 1/stop” at the bottom, and now the minute dis-  
play will flash.  
6.2 High Efficiency Air Filter  
An optional high efficiency pleated microglass paper filter  
is available for the UA-135H. This filter is rated as 90%-95%  
efficient by the ASHRAE Dust Spot test method 52-76. The  
high efficiency pleated microglass paper filter should be used  
in conjunction with the standard filter, and placed directly  
behind the standard filter.  
8. Use the “SET” + or – buttons to adjust to the desired  
minute setting.  
9. Pressing the “PROG” button again to move onto “program  
2/stop” and begin the process again if setting the other  
programs. Follow the same procedure for each program.  
10. To end the program process simply leave the control  
alone (don’t push any buttons) for about 10 seconds.  
The unit will remember any changes and return to  
“home state”.  
This filter is able to remove allergy-causing particles from the  
airstream. Check the high efficiency air filter every two years  
and replace if necessary. Be careful not to damage the  
media when handling the high efficiency pleated paper filter.  
Do not attempt to clean the high efficiency pleated paper fil-  
ter. It should be replaced when it becomes restrictive.  
6.3 Optional Fresh Air Return  
5.2J Programming Notes  
To run the ventilation program, the damper mode must  
be in the “program” mode (“Pr”).  
Check and clean the screen on the outdoor fresh air return  
seasonally. The screen may become plugged during the  
seasons when there are many particles in the outdoor air.  
The timer can be operated manually without changing the  
program by adjusting the damper mode from “program” to  
either “on” or “off”.  
7 Service  
CAUTION  
CAUTION: Servicing the UA-135H with its high pressure  
refrigerant system and high voltage circuitry presents a  
health hazard which could result in death, serious bodily  
injury, and/or property damage. Only qualified service  
people should service this unit.  
To delete a program after it has been entered, adjust the  
program so the “START” and “STOP” times are identical.  
Occupants should determine ventilation times and rates.  
Therma-Stor Products makes no firm recommendations  
concerning when to ventilate. Common ventilation schedules  
include constant ventilation, ventilation based on occupancy  
times, intermittent operation, and seasonal ventilation.  
7.1 Technical Description  
The UA-135H uses a refrigeration system similar to an air  
conditioner's to remove heat and moisture from incoming air,  
and add heat to the air that is discharged. Hot, high-pressure  
refrigerant gas is routed from the compressor to the condens-  
er coil (See Figure 1). The refrigerant is cooled and con-  
densed by giving up its heat to the air that is about to be dis-  
charged from the unit. The refrigerant liquid then passes  
through a filter/drier and capillary tubing which causes the  
refrigerant pressure and temperature to drop. It next enters  
the evaporator coil where it absorbs heat from the incoming  
air and evaporates. The evaporator operates in a flooded  
condition, which means that all the evaporator tubes contain  
liquid refrigerant during normal operation. A flooded evapora-  
tor should maintain nearly constant pressure and tempera-  
ture across the entire coil, from inlet to outlet.  
Remember the control must be on for the unit to be functioning  
- make sure the green power indicator “ON” is lit.  
5.2K Stop Start  
During summer in hot, humid climates operating in  
ventilation mode will increase the moisture load in the  
home. Consider reducing the amount or frequency of fresh  
air ventilation if indoor humidity continues to be high.  
6 Maintenance  
6.1 Standard Air Filter  
The UA-135H is equipped with a pleated cloth air filter.  
This filter should be checked every three months. Operating  
the unit with a dirty filter will reduce dehumidifier capacity  
and efficiency and may cause the compressor to cycle off  
and on unnecessarily on the defrost control.  
IMPORTANT  
DO NOT operate the unit without the standard filter or  
with a less effective filter than the standard filter. The  
heat exchange coils inside the unit could become clogged  
and require disassembly to clean. Filter non-compliance  
invalidates the product warranty.  
Figure 1: Refrigeration System of UA-135H  
Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual  
7
The mixture of gas and liquid refrigerant enter the accumulator  
after leaving the evaporator coil. The accumulator prevents  
any liquid refrigerant from reaching the compressor. The  
compressor evacuates the cool refrigerant gas from the  
accumulator and compresses it to a high pressure and  
temperature  
Evaporator coil frosted continuously, low dehumidifying  
capacity.  
1. Defrost thermostat loose or defective.  
2. Low refrigerant charge  
3. Dirty air filter(s) or airflow restricted.  
4. Excessively restrictive ducting connected to unit.  
Unit not providing ventilation. Ventilation timer not operating  
correctly.  
7.2 Troubleshooting  
No dehumidification, neither impeller fan nor compressor  
run with fan switch and ventilation timer OFF.  
1. Unit unplugged or no power to outlet.  
2. Humidity control set too high or defective.  
3. Loose connection in internal or control wiring.  
4. Defective Compressor relay.  
1. If timer is not functioning correctly reset timer and  
reprogram.  
2. Check control wire connections (check connections at  
fresh air damper also).  
3. Defective fresh air damper.  
4. Defective fan switch.  
5. Defective control transformer.  
6. Low pressure Control open.  
Unit removes some water, but not as much as expected.  
1. Air temperature and/or humidity have dropped.  
2. Humidity meter and or thermometer used are  
out of calibration.  
7. Optional Condensate Pump Safety Switch open.  
No dehumidification, compressor does not run but impeller  
fan runs with fan switch and ventilation timer OFF and  
humidity control turned to ON.  
3. Unit has entered defrost cycle.  
4. Air filter dirty.  
5. Defective defrost thermostat.  
1. Defective compressor run capacitor.  
2. Bad connection in compressor circuit.  
3. Defective compressor overload.  
6. Low refrigerant charge.  
7. Air leak such as loose cover or ducting leaks.  
8. Defective compressor.  
4. Defective compressor.  
5. Defrost thermostat open.  
9. Restrictive ducting.  
10. Optional Condensate Pump Safety Switch open.  
Impeller fan runs with fan switch and ventilation timer OFF,  
but compressor cycles on & off.  
Unit Test to determine problem:  
1. Low ambient temperature and/or humidity causing  
unit to cycle through defrost mode.  
2. Defective compressor overload.  
3. Defective compressor.  
4. Defrost thermostat defective.  
1. Detach field control wiring connections from main unit.  
2. Connect the yellow and green pigtails from the main  
unit together; only the impeller fan should run.  
Disconnect the wires.  
3. Connect the yellow and blue pigtails from the main  
unit together; the compressor and impeller fan  
should run.  
5. Dirty air filter(s) or airflow restricted.  
6. Low refrigerant charge, causing defrost control  
to cycle.  
4. If these tests work, the main unit is working properly.  
You should check the control panel and field control  
wiring for problems next.  
7. Bad connection in compressor circuit. Impeller fan  
does not run with fan switch in either position.  
5. Remove the control panel from the mounting box and  
detach it from the field installed control wiring.  
Connect the blue, yellow, and green wires from the  
control panel directly to the corresponding colored pig-  
tails on the main unit. Leave the violet, white and red  
wires disconnected!  
Impeller fan does not run with ventilation timer activated.  
Compressor runs briefly but cycles on & off with humidity  
control turned to ON.  
1. Loose connection in impeller fan circuit.  
2. Obstruction prevents impeller fan rotation.  
3. Defective impeller fan.  
6. Turn on the fan switch; the impeller fan should run.  
Turn off the fan switch.  
4. Defective impeller fan relay.  
5. Defective impeller fan capacitor.  
7. Turn on the humidity control; the compressor and  
impeller fan should run.  
8. If these tests work, the problem is most likely in the  
field control wiring.  
Impeller fan runs with fan switch ON. Impeller fan does not  
run with ventilation timer activated.  
1. Defective ventilation timer.  
2. Time not correct on ventilation timer.  
3. Ventilation timer set to manual & switched OFF.  
4. Defective fan switch.  
8
Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual  
The electric ventilation timer operates on 24 Vac from the  
control circuit. DO NOT connect high voltage to the damper  
motor or damage to the motor may result. DO NOT force the  
blade of the damper by hand or damage to the damper  
motor may result.  
7.3 Refrigerant Charging  
If the refrigerant charge is lost due to service or a leak, a  
new charge must be accurately weighed in. If any of the old  
charge is left in the system, it must be recovered before  
weighing in the new charge. Refer to the unit nameplate for  
the correct charge weight and refrigerant type.  
The damper opens in one direction only. The damper rotates  
very slowly, allow sufficient time for the damper to cycle. The  
damper will take approximately 1 minute to cycle from closed  
to open or from open to closed.  
7.4 Impeller Fan Replacement  
The motorized impeller fan is a unitary assembly consisting  
of the motor and impeller fan. If defective, the complete  
assembly must be replaced.  
If the electric ventilation damper fails to operate:  
1. Check that the wiring is correct and that voltage  
is present at the damper motor.  
1. Unplug the power cord  
2. Remove the cabinet access panel  
3. Disconnect the impeller's blue, black, brown leads,  
which are attached to the capacitors as well as the  
green/yellow ground lead.  
4. Remove the impeller access plate, which is the  
D-shaped plate mounted to the supply/exhaust panel  
of the UA-135H. The impeller should be attached to  
this D-shaped plate. Pull the leads through the black  
plastic scroll housing inside, as you remove the  
impeller access plate.  
2. Check for any obstruction inside the damper. If the  
electric ventilation damper fails to operate after  
performing these checks, it must be replaced.  
7.8 Condensate Pump Kit  
An optional condensate pump kit is available from the factory  
for use with the UA-135H. Condensate is automatically  
pumped to a remote location when the water level in the  
pump's reservoir rises to close the float switch. The pump  
also contains a safety float switch. The white leads from this  
switch extend from beneath the pump cover. This switch  
should be installed in series with the field wire that connects  
the blue (#5) lead from the UA-135H to the blue (#5) lead on  
the control panel. If the pump fails, this switch opens the  
compressor control circuit and stops water production before  
the reservoir overflows. The UA-135H will continue to venti-  
late or circulate air as normal, but will not dehumidify until  
this switch closes.  
5. Remove the two cable clamps securing the impeller  
cord to the access plate.  
6. Remove the defective impeller from the access plate  
7. Reassemble the new impeller fan by reversing the  
above procedure. Note: Make sure that the new  
impeller cord is secured tightly to the impeller access  
plate utilizing the two cable clamps given with the unit.  
Make sure to reconnect all leads in their correct posi-  
tions.  
7.5 Compressor/Capacitor Replacement  
This compressor is equipped with a two terminal external  
overload and a run capacitor, but no start capacitor or relay.  
CAUTION  
CAUTION-ELECTRICAL SHOCK HAZARD: Electrical power  
must be present to perform some tests. These tests should  
be performed by a qualified service person.  
Figure 2: Condensate pump.  
7.6 Replacing a Compressor, Nonburn Out  
Remove the refrigerant from the system. Replace the  
compressor and liquid line filter/drier. Charge the system  
to 50 PSIG and check for leaks. Remove the charge and  
weigh in the refrigerant quantity listed on the nameplate.  
Operate the system to verify performance.  
7.7 Electric Ventilation Damper  
The electric ventilation damper is controlled by the ventilation  
timer. The damper will open when the ventilation timer is  
activated to allow fresh air into the structure through the 6”  
diameter fresh air inlet duct. The electric ventilation damper  
will remain closed when the ventilation timer is not activated  
to prevent over-ventilating the structure when the unit is  
dehumidifying or recirculating the indoor air.  
Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual  
9
ULTRA-AIRE Dehumidifier Limited Warranty  
WARRANTOR:  
LIMITATIONS AND EXCLUSIONS: This warranty  
does not cover any defect, malfunction, etc.  
resulting from misuse, abuse, lack of normal care,  
corrosion, freezing, tampering, modification,  
unauthorized or improper repair or installation,  
accident, acts of nature or any other cause beyond  
Therma-Stor LLC's reasonable control.  
Therma-Stor LLC  
PO Box 8050  
Madison, WI 53708  
Telephone: 1-800-533-7533.  
If any Ultra-Aire 135H part is repaired or replaced,  
the new part shall be warranted for the balance of  
original warranty (but all warranty periods will be  
extended by the period of time, if any, that the  
Ultra-Aire 135H is out of service while awaiting  
covered warranty service).  
WARRANTY: This warranty covers the Ultra-Aire  
135H and extends only to the original residential  
end-user of the Ultra-Aire dehumidifier, and may  
not be assigned or transferred.  
Year One  
-
100% parts and labor (all  
components). Therma-Stor LLC warrants that,  
for one (1) year the ULTRA-AIRE APD  
dehumidifier will operate free from any defects  
in materials and workmanship, or Therma-Stor  
LLC will, at its option, repair or replace the  
defective part(s), free of any charge.  
Warranty service will be performed during normal  
working hours.  
UPON THE EXPIRATION OF THE WRITTEN WARRANTY  
APPLICABLE TO THE ULTRA-AIRE DEHUMIDIFIER  
OR ANY PART THEREOF, ALL OTHER WARRANTIES  
IMPLIED BY LAW, INCLUDING MERCHANTABILITY  
AND FITNESS FOR A PARTICULAR PURPOSE, SHALL  
ALSO EXPIRE. ALL WARRANTIES MADE BY  
THERMA-STOR LLC ARE SET FORTH HEREIN, AND  
NO CLAIM MAY BE MADE AGAINST THERMA-STOR  
LLC BASED ON ANY ORAL WARRANTY. IN NO  
EVENT SHALL THERMA-STOR LLC, IN CONNECTION  
WITH THE SALE, INSTALLATION, USE, REPAIR OR  
REPLACEMENT OF ANY ULTRA-AIRE DEHUMIDIFIER  
OR PART THEREOF BE LIABLE UNDER ANY LEGAL  
THEORY FOR ANY SPECIAL, INDIRECT OR  
CONSEQUENTIAL DAMAGES INCLUDING WITHOUT  
LIMITATION WATER DAMAGE (THE END-USER  
SHOULD TAKE PRECAUTIONS AGAINST SAME),  
LOST PROFITS, DELAY, OR LOSS OF USE OR  
DAMAGE TO ANY REAL OR PERSONAL PROPERTY.  
Year(s) Three through Five Therma-Stor LLC  
-
further warrants for a period of five (5) years,  
the condenser, evaporator, and compressor of  
the ULTRA-AIRE dehumidifier will operate free  
of any defects in material or workmanship, or  
Therma-Stor LLC, at its option, will repair or  
replace the defective part(s).  
USER RESPONSIBILITIES: Warranty service  
must be performed by a servicer authorized by  
Therma-Stor Products. To obtain warranty service you  
must obtain a return material authorization (RMA). To  
obtain an RMA you must present proof of purchase  
or (lease), by use of a warranty card, original sales  
receipt or other reasonable and reliable means.  
To obtain an RMA call Therma-Stor LLC at the above  
number and ask for the Therma-Stor LLC Service  
Department, which will then issue an RMA#  
and arrange for, at our option, either repair or  
replacement.  
Some states do not allow limitations on how long  
an implied warranty lasts, and some do not allow  
the exclusion or limitation of incidental or  
consequential damages, so one or both of these  
limitation may not apply to you.  
FREIGHT: Freight to and from the servicer is the  
responsibility of the end-user. The end-user  
is responsible for normal care and proper return  
packaging.  
LEGAL RIGHTS: This warranty gives you specific  
legal rights, and you may also have other rights  
which vary from state to state.  
10  
Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual  
9. Optional Parts List: UA-135H Indoor Air Quality System  
Item  
Part No.  
Description  
1
2
3
4
5
6
7
8
9
10  
4024125  
4024155  
4024539  
4025287  
4022220  
4024377  
4024369  
4024370  
4020646  
4025463  
Control Panel Assembly, Ventilation Timer & Humidity Control  
Control Panel Assembly, Humidity/Fan  
DEH 2000 Digital Controller  
Filter Box  
Condensate Pump Kit, External  
Optional External Insulation Kit (not shown)  
2”x20”x24” Filter (not shown)  
4”x20”x24” Filter (not shown)  
10” Backdraft Damper (not shown)  
Stand Kit (not shown)  
Figure 1: Ventilation Timer &  
Humidity Control  
4”  
2”  
Figure 4: Filter Box  
Figure 2: Humidity/Fan Control  
Figure 5: Condensate Pump  
Figure 3: DEH 2000  
Digital Control  
Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual  
11  
TM  
LLC  
PO Box 8050  
1919 S. Stoughton Road  
Madison, WI 53708  
Phone: 608-222-5301  
Fax: 608-222-1447  
Information in this document is subject to change without notice.  
No part of this document may be reproduced or transmitted in any  
form or by any means, electronic or mechanical, for any purpose,  
without the express written permission of Therma-Stor LLC.  
© 2004 Therma-Stor LLC. All rights reserved.  
12  
Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual  

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