Ultra-air 100V User manual

Dehumidification
The highly efficient Ultra-Aire 100V 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 a
significant 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 of the air leaving the unit.
The Ultra-Aire 100V is controlled by 24 volt remote wired controls. A
variety of controls are available suitable to various applications.
Fresh Air Ventilation
Optional fresh outdoor air may be ducted to the unit via a six inch
round duct. This provides fresh air to dilute pollutants and maintain
high oxygen content in the air. The amount of fresh air ventilation can
be regulated by a variety of dampers and controls.
Air Filtration
The UA-100V includes air filtration to improve indoor air quality. A
MERV-11 media filter is standard. An optional MERV-14 deep pleated
95% media filter is available for optimum air filtration and to reduce
potentially harmful airborne particles. If the optional filter is chosen,
the standard filter operates as a prefilter.
© 2013 Therma-Stor LLC •Manual P/N TS-600 02/13
4201 Lien Rd. Madison, WI 53704 •TOLL-FREE 1-800-533-7533 •www.thermastor.com •[e-mail]
INSTALLER’S & OWNER’S MANUAL
HVAC INSTALLER: PLEASE LEAVE MANUAL FOR HOMEOWNER
P/N 4029710 • Serial No.________________________ Install Date:___________
Sold by:

Table of Contents
Safety Precautions....................................................................... 2
1. Intended Application ................................................................ 2
2. Specifications .......................................................................... 2
3. Installation............................................................................... 3
3.1 Location ........................................................................... 3
3.2 Electrical Requirements.................................................... 3
3.3 Condensate Removal........................................................ 3
3.4 Ducting............................................................................. 3
3.4A Installing Duct Collars................................................ 3
3.4B Ducting for Dehumidification ..................................... 3
3.4C Ducting for Fresh Air.................................................. 4
3.4D Installation in a basement ......................................... 4
3.4E Installation in a attic .................................................. 5
3.4F Installation with (2) HVAC systems ............................. 5
3.4G Installation without an HVAC system.......................... 5
3.5 Quiet Installation............................................................... 5
4. Controls................................................................................... 5
5. DEH 3000/DEH 3000R Digital Control ..................................... 6
6. Maintenance............................................................................ 7
6.1 Standard Air Filter............................................................. 7
6.2 High Efficiency Air Filter.................................................... 7
7. Service .................................................................................... 7
7.1 Warranty .......................................................................... 7
7.2 Technical description. ....................................................... 7
7.3 Troubleshooting ............................................................... 8
7.4 Refrigerant Charging ........................................................ 8
7.5 Fan Replacement.............................................................. 8
7.6 Compressor/Capacitor Replacement................................. 8
7.6A Checking Compressor Motor Circuits......................... 8
7.6B Replacing Burned Out Compressor............................ 9
7.6C Replacing Compressor-Nonburn Out.......................... 9
7.7 Remote Controls............................................................... 9
7.8 Defrost Thermostat......................................................... 10
7.9 Electric Ventilation Damper............................................. 10
Electrical Schematic .................................................................. 10
Pictorial Electrical Diagram........................................................ 11
Service Parts List....................................................................... 12
Optional Parts List...................................................................... 13
External Insulation Kit ................................................................ 13
Warranty.................................................................................... 14
Safety Precautions
Read the installation, operation and maintenance
instructions carefully before installing and operating this device. Proper
adherence to these instructions is essential to obtain maximum benefit
from your Ultra-Aire indoor air quality system.
Read and save these instructions
• The device is designed to be installed INDOORS IN A SPACE THAT IS
PROTECTED FROM RAIN AND FLOODING.
• Install the unit with space to access the front panel for maintenance
and service. DO NOT INSTALL UNIT WITH THE FRONT PANEL
INACCESSIBLE.
• Avoid directing the discharge air at people, or over the water in pool
areas.
• If used near a pool or spa; be certain there is NO chance the unit
could fall into the water, splashed and that it is plugged into a GFCI
GROUND FAULT CIRCUIT INTERRUPT OUTLET.
• DO NOT use the device as a bench or table.
• DO NOT place the device directly on structural members.
• A drain pan MUST be placed under the unit if installed above a living
area or above an area where water leakage could cause damage.
1. Intended Application for Ultra-Aire 100V
For the ideal installation, draw air from the central part of the home
and return it to isolated areas of the home like the bedrooms, den,
utility room, or family room. The ductwork of the existing heating
system can be used to supply air to the home.
2. Specifications
Part Number: 4029710
Blower: 255 CFM @ 0.0" WG
215 CFM @ 0.2" WG
170 CFM @ 0.4" WG
Power: 700 Watts @ 80°F and 60% RH
Supply Voltage: 115 VAC – 1phase – 60 Hz
Current Draw: 6.4 Amps
Energy Factor: 3.0 L/kWh
Operating Range: 56°F Min, 95°F Max (Inlet Air Temperature)
Sized for: Up to 2,500 Sq. Ft. - Typical
Minimum Performance at 80°F and 60% RH
Water Removal: 110 pints/day
Efficiency: 6.2 Pints/kWh
UA-90H Duct Connections:
6" Round Inlet; 8" Round Inlet; 8" Round Outlet
Air Filter: MERV-11, Standard Pleat
Efficiency: 65% ASHRAE Dust Spot
Size: 16" x 20" x 2"
Optional Air Filter: MERV-14, Embossed Pleat
(will need filter housing)
Efficiency: 95% ASHRAE Dust Spot
Size: 16" x 20" x 4"
Power Cord: 9', 115 VAC, Ground
Drain Connection: .56" ID x 8’ Vinyl Hose
Refrigerant Type: R410A (Refer to manufacturers label for
more information)
Refrigerant Amount: 1 lb. 7 oz.
Dimensions:
Unit With Collars Unit Without Collars Shipping
Width: 21" 21" 24"
Height: 49" 43" 49"
Length: 17 17" 21"
Weight: 119 lbs. 120 lbs. 138 lbs.
TABLE OF CONTENTS
2Ultra-Aire 100V Installer’s & Owner’s Manual

3. Installation
3.1 Location
The Ultra-Aire should be located near the existing air handling system
to minimize the required ductwork for connecting the Ultra-Aire to
the existing air handling system.The controls for the Ultra-Aire are
remote from the unit and must be located in the space that is to be
conditioned. The controls are low voltage (24 volt) and should be
connected to the Ultra-Aire with low voltage thermostat cable.
If fresh air ventilation is desired, thought should be given to the
location for the fresh air ducting. A 6" round duct will have to be
installed on the Ultra-Aire and run to the outside of the structure to
bring in fresh air. Use an 8" insulated round duct for lengths of more
than 25' or if more than 100 CFM is needed.
3.2 Electrical Requirements
The Ultra-Aire plugs into a common grounded outlet on a 15 Amp
circuit. It draws between 6 and 7 Amps under normal operating
conditions. If used in a wet area (pool, spa room, or basement prone
to flooding), a ground fault interrupter protected circuit is required.
The installer must supply the wiring between the Ultra-Aire and the
control panel. Be sure to safely route the control wires to prevent
damage during installation. Be careful not to cross the wires when
connecting the Ultra-Aire and the remote control panel or damage to
the transformer may result.
The remote controls of the Ultra-Aire are powered by a low voltage
circuit (24 Vac) and must NEVER contact or be connected to a high
voltage circuit. The control wires leaving the Ultra-Aire and the
remote control panels are color coded to prevent confusion. Some of
the control wires leaving the Ultra-Aire may not be used with certain
control panels and should be left safely disconnected with wire
nuts taped onto the stripped ends. Be sure to consult the electrical
schematic in this manual or on the front panel of the Ultra-Aire before
making the control connections.
WARNING! Do not allow the yellow lead
from the Ultra-Aire to contact the red lead or orange
lead from the Ultra-Aire or damage to the transformer
will result.
NOTE: Reset the ventilation timer before attempting to
program after initial installation. The timer may not ..
operate correctly until it is reset.
3.3 Condensate Removal
Condensate drains by gravity via the clear hose extending from the
unit. Route the hose to a floor drain. Use care to keep the hose as flat
to the floor as possible; excessive humps will prevent proper drainage.
We do not call for a trap since there is an internal trap with this unit.
If the Ultra-Aire is located too far from a floor drain for the attached
hose to reach, inexpensive 1⁄2" PVC pipe can be used to extend it. It is
commonly available in 10' lengths from building supply, plumbing and
hardware stores. It will slide tightly inside the end of the drain hose.
If more than one length of pipe is required, they can be joined with a
short piece cut from the end of the drain hose.
An optional condensate pump may be installed if a lift is required to
dispose of the condensate. The condensate pump kit can be ordered
direct from the factory. See item 27 on page 21.
3.4 Ducting
3.4A Installing Duct Collars
The Ultra-Aire is equipped with 8" and 6" round inlet collars and an
8" round white exhaust collar. The 8" and 6" round inlet collars are
designed with tabs that fold under the top of the Ultra-Aire. The 8"
round white exhaust collar is attached to the Ultra-Aire by (4) screws.
To install the inlet collars: Insert the tabs of the collar into the hole in
the top of the Ultra-Aire and fold the tabs up to attach to the Ultra-Aire.
To install the exhaust collar: Bend the (4) tabs toward the inside of
the collar 90°. Attach the collar to the Ultra-Aire cabinet using 1⁄2"
long #8 sheet metal screws. DO NOT use screws longer than 1⁄2" to
attach this collar or damage to the refrigeration system may result.
3.4B Ducting for Dehumidification
For the ideal installation, draw air from the central part of the home
and return it to the isolated areas of the home like the bedrooms,
den, utility room, or family room. The ductwork of the existing heating
system can be used to supply air to the home. If the existing supply
goes to isolated areas of the home, discharge the supply of the
Ultra-Aire into the supply of the existing heating system. If the existing
heating system incorporates a central supply, installation of a separate
supply duct from the Ultra-Aire to each isolated area is recommended.
DO NOT draw air directly from the kitchen, laundry, or basement. All
flexible ducting connected to the Ultra-Aire should be UL listed.
The inlet of the Ultra-Aire is the 8" diameter hole on top of the unit. An
8" round collar is supplied with the unit to attach to round duct. The
duct may be permanently attached to the collar. A 6" round collar is
provided with the unit to attach to the 6" hole in the top. The 6" collar
should be capped if fresh make-up air is not desired. If fresh make-up
air is desired see section 3.4C.
The outlet of the Ultra-Aire is located on the side of the unit. A second
8" round collar is supplied with the unit and can be attached using the
screws provided and the pre-punched holes in the cabinet side.
A length of 10 feet or more of acoustical flex ducting on the outlet of
the Ultra-Aire will reduce air noise from the blower. A length of flexible
ducting on all Ultra-Aire duct connections is recommended to reduce
noise and vibration transmitted to rigid ductwork in the structure.
Ducting the Ultra-Aire as mentioned in sections 3.4A-3.4G requires
consideration of the following points:
SAFETY PRECAUTIONS
3Ultra-Aire 100V Installer’s & Owner’s Manual

Duct Sizing: For total duct lengths up to 25', use a
minimum 8" diameter round or equivalent rectangular. For longer
lengths, use a minimum 10" diameter or equivalent. Grills or
diffusers on the duct ends must not excessively restrict air flow.
Isolated Areas: Effective dehumidification may require that ducting
be branched to isolated, stagnant areas. Use 6" or larger diameter
branch ducting to each of two or three areas; use 4" or larger to
each of four or more areas.
3.4C Ducting for Fresh Air
Fresh air can be brought into the structure by connecting a duct
from outside to the 6" Ultra-Aire inlet and by turning on the fan
switch or activating the humidity control on units with the humidity
control panel. Activate the ventilation timer on units with the
ventilating & humidity control panel to bring in fresh air. Advantages
of this form of ventilation include:
1. Outside air is filtered before entering the building.
2. Outside air will be dehumidified before entering if the Ultra-
Aire is running.
3. Drawing air from outside and blowing inside aids in slightly
pressurizing the structure. This helps prevent unfiltered and
undehumidified air from entering elsewhere. It also reduces
the potential for carcinogenic radon gas to enter and provides
makeup air for open combustion and exhaust devices like the
clothes drier, fireplace, and water heater.
4. The need for an alternate ventilation device may be eliminated.
An insulated 6" diameter duct is generally sufficient to provide up
to 125 CFM of outside air. Large quantities of outside air will impact
Ultra-Aire performance positively or negatively, depending upon the
difference between inside and outside air conditions. Consult the
factory by calling 1-800-533-7533 for recommendations regarding
the use of higher flows with your specific application.
The outside air duct should be connected to the 6" round collar
on top of the unit. The 6" round collar includes a manual damper.
Adjust the manual damper to provide the desired amount of fresh air
for ventilation. The amount of fresh air should be based on the size
and occupancy of the residence. If you are unsure of your ventilation
air requirements, consult the factory by calling 1-800-533-7533 for
assistance.
3.4D Installation in a Basement or Crawlspace with an
Existing Forced Air HVAC System.
If the structure in which the Ultra-Aire is to be installed has an
existing forced air HVAC system, utilize the HVAC system to make
the Ultra-Aire installation easier.
If the existing system has multiple returns, select one to disconnect
from the existing forced air system and use it for the dedicated
Ultra-Aire return. Always select a return from a central location
in the structure in an area that is always open to the rest of the
structure. Do not use a return from a room that may have its door
closed much of the time.
Basement Installation: Locate a separate return for the Ultra-Aire
in a central area of the structure. Duct the supply of the Ultra-Aire
to a 8" x 8" x 8" tee/damper that is 30% open to the basement.
Duct the other side of the tee to the air return of the existing HVAC
system. If the existing HVAC system has a central return, duct the
other side of the tee to the air supply of the existing HVAC system.
Connect a duct from outside to the 6" collar of the Ultra-Aire if you
wish to provide fresh make-up air.
Crawlspace Installation: Locate a separate return for the Ultra-
Aire in a central area of the structure. Duct the supply of the
Ultra-Aire to a 8" x 8" x 8" tee/damper that is 30% open to the
FOR HVAC INSTALLER ONLY
4Ultra-Aire 100V Installer’s & Owner’s Manual

crawlspace. Duct the other side of the tee to the air return of the
existing HVAC system. If the existing HVAC system has a central
return, duct the other side of the tee to the air supply of the existing
HVAC system. Connect a duct from outside to the 6" collar of the
Ultra-Aire if you wish to provide fresh make-up air.
3.4E Installation in an Attic with an Existing Forced
Air HVAC System
ALWAYS install a catch pan for condensate under the
Ultra-Aire in an attic or condensate may drip down on
the ceiling of the living space below.
Locate a separate return for the Ultra-Aire in a central area of the
structure. Duct the supply of the Ultra-Aire to the air supply of the
existing HVAC system. If the existing HVAC system has a central
return, duct the supply of the Ultra-Aire to the air supply of the
existing HVAC system. Connect a duct from outside to the 6" collar
of the Ultra-Aire if you wish to provide fresh make-up air.
3.4F Installation in a Structure with Two Forced Air
HVAC Systems
Attach the Ultra-Aire return to to a independent return from the
upper level. Attach the Ultra-Aire supply to the supply of the
basement HVAC system. This will promote circulation of air through
the whole structure from the upper level to the lower level through
the Ultra-Aire . If the Ultra-Aire is not connected to both HVAC
systems, it will not control the humidity and ventilation of the entire
structure. Connect a duct from outside to the 6" collar of the Ultra-
Aire if you wish to provide fresh make-up air.
3.4G Installation in a Structure with No Existing
Forced Air HVAC Systems
When installing the Ultra-Aire in a structure that does not have a
forced air HVAC system, a single return for the Ultra-Aire should
be installed in central open area of the structure. DO NOT locate
the return in a bathroom or a kitchen. The supply of the Ultra-
Aire should be located in the remote areas of the structure (such
as bedrooms, den, etc.). By ducting this way the air inside the
structure will circulate through the Ultra-Aire to be filtered and
dehumidified. Connect a duct from outside to the 6" collar of the
Ultra-Aire if you wish to provide fresh make-up air.
3.5 Quiet Installation
A length of 10 feet or more of acoustical flex ducting on the outlet of
the Ultra-Aire will reduce air noise from the blower. A length of flexible
ducting on all Ultra-Aire duct connections is recommended to reduce
noise and vibration transmitted to rigid ductwork in the structure.
4. Controls
All control panels should be mounted in a central area of the 4.
Controls
The Ultra-Aire can be equipped with various accessories to
enhance its operation. A remote control must be used with the
Ultra-Aire. ThermaStor offers the DEH 3000 proprietary controller.
The DEH 3000 allows homeowners the ability to monitor and
control relative humidity levels in their home. This control is also
offered witha remote sensing option.
WARNING: DO NOT allow the yellow lead from
the unit to contact the red lead or the white lead from
the unit or damage to the transformers will result.
The UA dehumidifier is controlled using five color-coded wires.
Green (or brown) = Fan control
Blue = Dehumidification (fan and compressor) control
Red = 24volt AC power transformer neutral side (common with white)
White = 24volt AC power transformer neutral side (common with red)
Yellow = transformer high side
Between the red/white lead and the yellow leads is a 40VA trans-
former. This low voltage power source powers the relay coils which
control the fan and compressors. This 24VAC transformer can also
be used to power HVAC assessories external to the dehumidifier.
• To turn the dehumidifier on make contact between yellow and
blue wires.
• To turn the fan on make contact between yellow and green(or
brown) wires.
• To power an HVAC accessory, connect the accessory to the
white (or red) wire and the yellow wire.
FOR HVAC INSTALLER ONLY
5Ultra-Aire 100V Installer’s & Owner’s Manual
Ultra-Aire
Dehumidifier
RED
YELLOW
BLUE
GREEN or BROWN
WHITE
Internal Connections
OPTIONAL
DAMPER
24 VAC
DMP COMP FAN
(P/N 4028539; with remote: P/N 4028407)

6Ultra-Aire 100V Installer’s & Owner’s Manual
5. Optional Dehumidifier & Ventilation
System Controller
When used with Ultra-Aire Whole House Ventilating
Dehumidifiers, the DEH 3000/3000R allows homeowners the
ability to monitor and control relative humidity levels in their
home.
DEH3000 P/N: 4028539
DEH3000R (remote) P/N: 4028407
Model: DEH 3000
DEH 3000R (remote sense)
Operating Voltage: 24 VAC
Max Current
DMP, COMP, FAN: 1 AMP each
Humidity Range/Accuracy: 10 – 95% RH, ± 5%
Auxillary Relay Capacity: 5 Amps, 24VAC
Temp Range/Accuracy: 30°-90°F, 2%
Size: 4.95"L x 1.06"W x 4.19"H
Major Operations
nDigital control of Relative Humidity (Digital Set-Point)
nFan/Filter Operation
nProgrammable Ventilation Timer
nLarge, easy-to-read backlit LCD display
nEasy interaction with air handler fan (Interlock/Lockout)
nHigh Temperature Cut-Out
nDryout Cycle Timer
nAuto Reboot
nRemote Sensor (DEH 3000R Only)
To order call Therma-Stor at
1-800-533-7533
DEH 3000, DEH 3000R DEHUMIDIFIER & VENTILATION SYSTEM CONTROLLER
DEH3000/DEH 3000R
DEH3000/DEH 3000
R
Part No. 4028539 Part No. 4028407

7Ultra-Aire 100V Installer’s & Owner’s Manual
FOR HVAC INSTALLER AND HOMEOWNER
6. Maintenance
6.1 Standard Air Filter
The Ultra-Aire is equipped with a pleated cloth air filter. This filter
should be checked monthly. 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.
To access the air filter, remove a filter access panel from one end
of the Ultra-Aire. To remove the filter access panel from the Ultra-
Aire, pull the panel straight up about 1⁄2" until the bolt heads near
the bottom of the panel are centered in the larger opening of the
keyhole slots. Next rock the bottom of the access panel away from
the Ultra-Aire and lift the access panel straight up to remove the
tab on top of the panel from the slot in the top of the Ultra-Aire.
The filter should be readily visible and can be removed by pulling it
straight out of the Ultra-Aire.
The pleated cloth filter can generally be vacuumed clean several
times before needing replacement. Replacement filters can be
ordered from the factory or purchased locally if available. 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.
6.2 High Efficiency Air Filter
An optional high efficiency pleated microglass paper filter is
available for the Ultra-Aire. 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 beneath the standard filter.
This filter is able to remove allergy causing particles from the
airstream. The high efficiency filter has a much larger surface area
than the standard filter, thus the standard filter may need to be
cleaned or replaced several times before the high efficiency filter
requires replacement. Be careful not to damage the fabric media
when handling the high efficiency pleated paper filter. Do not
attempt to clean the high efficiency pleated paper filter. It should be
replaced when it becomes restrictive (See Figure 7).
7. Service
CAUTION: Servicing the Ultra-Aire 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.
7.1 Warranty
A warranty certificate has been enclosed with this unit; read
it before any repair is initiated. If a warranty repair is required,
call the factory first at 1-800-533-7533 for warranty claim
authorization and technical assistance.
7.2 Technical Description
The Ultra-Aire 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 (See Figure 3).
Hot, high pressure refrigerant gas is routed from the compressor
to the condenser coil (See Figure 3). The refrigerant is cooled
and condensed by giving up its heat to the air that is about to be
discharged from the unit. The refrigerant liquid then passes through
a filter/drier and capillary tubing which cause 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 evaporator should maintain constant pressure
and temperature across the entire coil, from inlet to outlet.
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 to repeat the
process.
7.3 Troubleshooting
Neither fan nor compressor running. Dehumidification is being
called for. No fan call.
1. Unit unplugged or no power to outlet.
2. Humidity control set too high.
3. Loose connection in internal or control wiring.
4. Defective Compressor relay.
5. Defective control transformer.
Compressor is not running. Dehumidification is being called
for. No fan call.

1. Defective compressor run capacitor (Sec. 7.6).
2. Loose connection in compressor circuit.
3. Defective compressor overload (Sec. 7.6A).
4. Defective compressor (Sec. 7.6).
5. Defrost thermostat open.
Compressor cycles on and off. Dehumidification is being called
for. No fan call
1. Low ambient temperature and/or humidity causing unit to
cycle through defrost mode.
2. Defective compressor overload (Sec. 7.6A).
3. Defective compressor (Sec. 7.6).
4. Defrost thermostat defective (Sec. 7.8).
5. Dirty air filter(s) or air flow restricted.
Fan is not running. Dehumidification or fan is being called for
1. Loose connection in fan circuit.
2. Obstruction prevents fan impeller rotation.
3. Defective fan.
4. Defective fan relay.
Low dehumidification capacity (evaporator is frosted
continuously). Dehumidification is being called for
1. Defrost thermostat loose or defective (Sec. 7.8).
2. Low refrigerant charge
3. Dirty air filter(s) or air flow restricted.
4. Excessively restrictive ducting connected to unit.
No ventilation. Ventilation is being called for.
1. Loose connection in ventilation control circuit
2. Loose connection in damper power circuit.
3. Defective fresh air damper.
7.4 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.
7.5 Fan Replacement
The centrifugal fan has a PSC motor and internal thermal overload
protection. If defective, the complete assembly must be replaced.
1. Unplug the power cord.
2. If an outlet duct is connected to the unit, remove it.
3. Remove the cabinet side.
4. Remove the 3 screws attaching the electrical box located in
front of the fan to the base.
5. Disconnect the fan leads. Black from the fan relay and white
from the run capacitor.
6. Remove the nuts & bolts holding the fan outlet flange to the
cabinet end and remove the fan.
7. Reassemble the new fan by reversing the above procedure.
7.6 Compressor/Capacitor Replacement
This compressor is equipped with a two terminal external overload
and a run capacitor, but no start capacitor or relay (See Figure 4).
CAUTION-ELECTRICAL SHOCK HAZARD:
Electrical power must be present to perform
some tests. These tests should be performed
by a qualified service person.
7.6A Checking Compressor Motor Circuits
Perform the following tests if the fan runs but the compressor does
not with the fan switch OFF and the humidity control ON.
1. Unplug the unit, remove the cabinet side and the electrical
connection cover on the compressor top.
2. Plug in the unit and turn the humidity control to ON. Check
for 110 volts from compressor terminal R to overload
terminal 3 using an AC voltmeter. If voltage is present, go to
step 3. If no voltage, there may be a loose connection in the
compressor circuit. Test each component for continuity. See
the appropriate section if a defect is suspected.
3. Unplug the unit, then disconnect the red and yellow wires
from compressor terminals R & S. Using an ohmmeter,
check continuity between the points listed below.
4. Compressor terminals C and S:
No continuity indicates an open start winding. The
compressor must be replaced. Normal start winding
resistance is 3 to 7 ohms.
5. Compressor terminals C and R:
No continuity indicates an open run winding. The
compressor must be replaced. Normal run winding
resistance is .5 to 2 ohms.
6. Compressor terminal C and overload terminal 1:
No continuity indicates a defective overload lead.
7. Overload terminals 1 and 3:
If there is no continuity, the overload may be tripped. Wait
10 minutes and try again. If there is still no continuity, it is
defective and must be replaced.
8. Compressor terminal C and compressor case: Continuity
indicates a grounded motor. The compressor must be
replaced.
9. Disconnect the wires from the run capacitor. Set the
ohmmeter to the Rx1 scale. The capacitor is shorted and
must be replaced if continuity exists across its terminals.
If there is no needle movement with the meter set on
the Rx100000 scale, the capacitor is open and must be
replaced.
FOR HVAC INSTALLER AND HOMEOWNER
8Ultra-Aire 100V Installer’s & Owner’s Manual

10 . Reconnect the wires to the compressor and capacitor. Plug
in and turn on the unit. If the compressor fails to start,
replace the run capacitor.
11. If the unit still does not start, adding a hard-start kit (relay &
capacitor) will provide greater starting torque. If this doesn't
work, the compressor has an internal mechanical defect and
must be replaced.
7.6B Replacing a Burned Out Compressor
The refrigerant and oil mixture in a compressor is chemically
very stable under normal operating conditions. However, when an
electrical short occurs in the compressor motor, the resulting high
temperature arc causes a portion of the refrigerant oil mixture to
break down into carbonaceous sludge, a very corrosive acid, and
water. These contaminants must be carefully removed otherwise
even small residues will attack replacement compressor motors and
cause failures.
The following procedure is effective only if the system is monitored after
replacing the compressor to insure that the clean up was complete.
1. This procedure assumes that the previously listed compressor
motor circuit tests revealed a shorted or open winding. If so,
cautiously smell the refrigerant from the compressor service
port for the acid odor of a burn out. WARNING: The gas could
be toxic and highly acidic. If no acid odor is present, skip down
to the section on changing a non-burn out compressor.
2. Remove and properly dispose of the system charge. DO NOT
vent the refrigerant indoors or allow it to contact your eyes
or skin.
3. Remove the burned out compressor. Use rubber gloves if there
is any possibility of contacting the oil or sludge.
4. To facilitate subsequent steps, determine the type of burn
out that occurred. If the discharge line shows no evidence
of sludge and the suction line is also clean or perhaps has
some light carbon deposits, the burn out occurred while the
compressor was not rotating. Contaminants are therefore
largely confined to the compressor housing. A single
installation of liquid and suction line filter/driers will probably
clean up the system. If sludge is evident in the discharge line,
it will likely be found in the suction line. This indicates the
compressor burned out will running. Sludge and acid have
been pumped throughout the system. Several changes of the
liquid and suction filter/driers will probably be necessary to
cleanse the system.
5. Correct the system fault that caused the burn out. Consult the
factory for advice.
6. Install the replacement compressor with a new capacitor and
an oversized liquid line filter. In a running burn out, install an
oversized suction line filter/drier between the accumulator and
compressor. Thoroughly flush the accumulator with refrigerant
to remove all trapped sludge and to prevent the oil hole from
becoming plugged. A standing burn out does not require a
suction line filter/drier.
7. Evacuate the system with a good vacuum pump and
accurate vacuum gauge. Leave the pump on the system for
at least an hour.
8. Operate the system for a short period of time, monitoring the
suction pressure to determine that the suction filter is not
becoming plugged. Replace the suction filter/drier if pressure
drop occurs. If a severe running burn out has occurred, several
filter/driers may have to be replaced to remove all of the acid
and moisture.
NOTE: NEVER use the compressor to evacuate
the system or any part of it.
7.6C 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 Remote Controls
The Ultra-Aire dehumidifier must be connected to a wall mounted
controller. Themastor offers the DEH 3000 proprietary controller.
If the Ultra-Aire fails to operate as desired, always check the
settings of the controls to insure that they are correct. Check that
the controls are receiving 24Vac from the Ultra-Aire. Check the
connections between the Ultra-Aire, the control panel, and the field
control wiring.
FOR HVAC INSTALLER AND HOMEOWNER
9Ultra-Aire 100V Installer’s & Owner’s Manual

7.8 Defrost Thermostat
The defrost thermostat is attached to the refrigerant suction tube
between the accumulator and the compressor. It will automatically
shut the compressor off if the low side refrigerant temperature
drops due to excessive frost formation on the evaporator coil.
The fan will continue to run, causing air to flow through the
evaporator coil and melt the ice. When the ice has melted, the
evaporator temperature will rise and the thermostat will restart the
compressor.
7.9 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.
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.
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.
If the electric ventilation damper fails to operate:
1. Check that the wiring is correct and that voltage is present at
the damper motor.
2. Check for any obstruction inside the damper.
If the electric ventilation damper fails to operate after performing
these checks, it must be replaced.
FOR HVAC INSTALLER AND HOMEOWNER
10 Ultra-Aire 100V Installer’s & Owner’s Manual
ULTRA-AIRE 100V ELECTRICAL SCHEMATIC

ULTRA-AIRE 100V PICTORIAL ELECTRICAL DIAGRAM
N.O.
WHT WHT
11 Ultra-Aire 100V Installer’s & Owner’s Manual

ULTRA-AIRE 100V SERVICE PARTS LIST
Item Part No. QTY. Description
1 4022254 1 Accumulator
2 4021475 1 Air Filter, Pleated Cloth
3 4026930 1 Fan (Blower) w/ Capacitor
4 4033925-02 1 Evaporator Coil
5 4028233 3 Capillary Tubes
6 4023875 1 Collar, Inlet, 8" Galvanized Steel
7 4023928 1 Collar, Inlet, 6" Galvanized Steel with Damper
8 4020623 1 Collar, Outlet, 8" White (for outlet only)
9 4029168 1 Compressor
10 4029169 1 Compressor Overload
11 4028226 1 Condenser Coil
12 4022445 1 Cord & Wire Harness
13 4029510 1 Filter/Drier
14 4021626 1 Hose, Drain Pan, .56" ID x 8'
15 4022484 1 Relay, SPST, 24 Vac, 30A
16 4020924 1 Relay, SPDT, 24 Vac, 15A
17 4033032-05 1 Run Capacitor, 45 MFD, 370V
18 4025741 1 Thermostat, Defrost
4021648 1 Defrost Control Mounting Clip
19 4022487 1 Transformer, 120/24 Vac, 40 VA
20 4021471 4 Wheel, 2", Plastic
21 4022444 1 Wire Harness, Low Voltage
22 4022442 1 Wiring Diagram (on Cover — not shown)
12 Ultra-Aire 100V Installer’s & Owner’s Manual

ULTRA-AIRE 100V EXTERNAL INSULATION KIT
13 Ultra-Aire 100V Installer’s & Owner’s Manual
ULTRA-AIRE 100V OPTIONAL PARTS LIST
4022489 1 Air Filter, High Efficiency, Pleated Microglass Paper, 90%-95%
4022220 1 Condensate Pump Kit
4023672 1 Damper, Duct, 6" Diameter, Electrically Actuated (not shown)
4023647 1 Damper, Check, 8" Diameter (not shown)
4021475 1 MERV 11 Filter (16" x 20" x 2")
4022489 1 MERV 14 Filter (16" x 20" x 4")
4022220 1 Pump Kit
4023484 1 Attic Insulation Kit
4023672 1 6" Motorized Damper
4020656 1 6" Inlet/Exhaust Hood
4023647 1 8" Gravity Damper
4020646 1 8" Butterfly Damper

14 Ultra-Aire 100V Installer’s & Owner’s Manual
Limited Warranty
Limited Warranty. Therma-Stor, LLC (“Therma-Stor”) warrants as
follows: (i) the Ultra-Aire 100V dehumidifier (“Product”) will be free
of material defects in workmanship or materials for a period of one
(1) year (“One-Year Warranty”) following the date of initial purchase
of such Product by an original customer purchasing from Therma-
Stor or an authorized reseller (“Customer”); and (ii) the Product’s
condenser, evaporator, and compressor will be free of material
defects in workmanship or materials for a period of five (5) years
following the date of initial purchase of such Product by a Customer.
Limitation of Remedies. CUSTOMER’S SOLE AND EXCLUSIVE
REMEDY UNDER THE ABOVE LIMITED WARRANTY AND THERMA-
STOR’S ENTIRE LIABILITY THEREUNDER, SHALL BE, AT THE SOLE
OPTION OF THERMA-STOR, REPLACEMENT OR REPAIR OF SUCH
PRODUCT OR ITS COMPONENTS (“COMPONENTS”) BY THERMA-
STOR OR THERMA-STOR’S AGENTS ONLY. REFRIGERANT, PIPING,
SUPPLIES, TRANSPORTATION COSTS, LABOR COSTS INCURRED
IN REPAIR OR REPLACEMENT OF SUCH COMPONENTS ARE NOT
INCLUDED. THIS DISCLAIMER AND EXCLUSION SHALL APPLY
EVEN IF THE EXPRESS WARRANTY AND LIMITED REMEDY SET
FORTH HEREIN FAILS OF ITS ESSENTIAL PURPOSE. CUSTOMER
ACKNOWLEDGES THAT NO REPRESENTATIVE OF THERMA-STOR OR
OF ITS AFFILIATES OR RESELLERS IS AUTHORIZED TO MAKE ANY
REPRESENTATION OR WARRANTY ON BEHALF OF THERMA-STOR
OR ANY OF ITS AFFILIATES OR RESELLERS THAT IS NOT IN THIS
AGREEMENT. Notwithstanding the above, during the term of the
One-Year Warranty only, Therma-Stor will provide, free of charge to
Customer, all Components and labor (except costs related to removal
and installation of Product) required to fulfill its obligations under such
One-Year Warranty.
Disclaimer of Warranties. EXCEPT FOR ABOVE LIMITED
WARRANTY, WHICH IS THE SOLE AND EXCLUSIVE WARRANTY
PROVIDED WITH RESPECT TO THE PRODUCT AND ITS COMPONENTS,
THERMA-STOR HEREBY DISCLAIMS ALL EXPRESS AND IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.
Warranty Limitations. The foregoing limited warranty extends only
to a Customer and shall be null and void upon attempted assignment
or transfer. A “defect” under the terms of the limited warranty shall
not include problems resulting from Customer’s or Customer’s
employees’, agents’, invitees’ or a third party’s misuse, improper
installation, improper design of any system in which the Product
is included, abuse, lack of normal care, failure to follow written
instructions, tampering, improper repair, or freezing, corrosion, acts
of nature or other causes not arising out of defects in Therma-Stor’s
workmanship or material. If a Product or Component is replaced
while under warranty, the applicable limited warranty period shall
not be extended beyond the original warranty time period. The
limited warranty does not cover any costs related to changes to a
Product or Component that may be required by any codes, laws, or
regulations that may become effective after initial purchase of the
Product by Customer.
Customer Responsibilities. As a further condition to obtaining
warranty coverage hereunder, the Customer must send a valid
warranty claim to Therma-Stor such that Therma-Stor receives
such claim prior to the end of the applicable warranty period.
Therma-Stor shall have no obligation hereunder with respect to
any claim received by Therma-Stor after the expiration of the
applicable warranty period. As a further condition to obtaining
warranty coverage hereunder, the Customer must present forms of
invoices evidencing proof of purchase of a Product. If such invoices
do not clearly indicate the date of initial purchase by a Customer,
the applicable Product’s date of manufacture will be used instead
of the date of initial purchase for the purpose of calculating the
commencement of the applicable warranty period. Warranty service
must be performed by Therma-Stor or a servicer authorized by
Therma-Stor. In order to obtain warranty service, the Customer
should call Therma-Stor at 1-800-533-7533 and ask for the
Therma-Stor Products Service Department, which will then arrange
for applicable warranty service. Warranty service will be performed
during customary, daytime working hours. If the Product must be
shipped for service, Customer shall be solely responsible for properly
packaging the Product, for all freight charges, and for all risk of loss
associated with shipment.
Limitation of Liability. IN NO EVENT SHALL THERMA-STOR,
IN CONNECTION WITH THE DESIGN, SALE, INSTALLATION, USE,
REPAIR, REPLACEMENT OR PERFORMANCE OF ANY PRODUCT,
COMPONENT, PART THEREOF OR WRITTEN MATERIAL PROVIDED
THEREWITH, BE LIABLE, TO THE EXTENT ALLOWED UNDER
APPLICABLE LAW, UNDER ANY LEGAL THEORY FOR ANY SPECIAL,
DIRECT, INDIRECT, COLLATERAL OR CONSEQUENTIAL DAMAGES
OF ANY KIND. NOTWITHSTANDING THE ABOVE LIMITATIONS AND
WARRANTIES, THE SOLE AND EXCLUSIVE LIABILITY OF THERMA-
STOR, REGARDLESS OF THE NATURE OR THEORY OF THE CLAIM,
SHALL UNDER NO CIRCUMSTANCES EXCEED THE PURCHASE PRICE
OF THE PRODUCT, COMPONENT OR PART UPON WHICH THE CLAIM
IS PREMISED.
Applicable Law and Venue. ANY ARBITRATION, ENFORCEMENT
OF AN ARBITRATION OR LITIGATION RELATED TO THE PRODUCT
WILL BE BROUGHT EXCLUSIVELY IN DANE COUNTY, WISCONSIN,
AND CUSTOMER CONSENTS TO THE JURISDICTION OF THE
FEDERAL AND STATE COURTS LOCATED THEREIN, SUBMITS TO
THE JURISDICTION THEREOF AND WAIVES THE RIGHT TO CHANGE
VENUE. CUSTOMER FURTHER CONSENTS TO THE EXERCISE OF
PERSONAL JURISDICTION BY ANY SUCH COURT WITH RESPECT TO
ANY SUCH PROCEEDING.
Miscellaneous. If any term or condition of this Limited Warranty
is found by a court of competent jurisdiction to be invalid, illegal or
otherwise unenforceable, the same shall not affect the other terms
or conditions hereof or thereof or the whole of this Limited Warranty.
Any delay or failure by Therma-Stor to exercise any right or remedy
will not constitute a waiver of Therma-Stor to thereafter enforce
such rights.

4201 Lien Rd. • Madison, WI 53704
Phone: [phone] • Fax: [phone]
Web: www.thermastor.com • Email: [e-mail]
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. © 2008 Therma-Stor LLC. All rights reserved.