Quest Engineering DRY70 Manual

Installation, Operation and Maintenance Instructions
– Read and Save These Instructions –
This manual is provided to acquaint you with the dehumidier so that
installation, operation and maintenance can proceed successfully.
Ultimate satisfaction depends on the quality of installation and a
thorough understanding of this equipment. The dehumidier is built
around tested engineering principles and has passed thorough internal
and 3rd party inspections for quality of workmanship and function.
Quest DRY150
Installation, Operation and Maintenance Instructions
4201 Lien Rd.
Madison, WI 53704 1-800-533-7533
www.QuestProtect.com [email protected]
– Read and Save These Instructions –
Specications subject to change without notice. TS-826
05/15
1
Quest DRY 70
Water Removal Rate (Pints/Day)
65 pints 80˚F, 60% (AHAM)
Quest DRY 70
FEATURES:
• Energy Star Listed
• Large Capacity
• MERV-11 Filtration
• Low Temperature Operation
• Carbon Filtration
• Optional Equipment
– Ducting Kit
– Hang Kit
– Caster Kit
– Condensate Pump
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Table of Contents
Introduction .............................................................. 1
Features & Benets ................................................... 1
Safety Precautions .................................................... 3
1. Intended Application ............................................ 4
2. Registrations ......................................................... 4
3. Specications ....................................................... 4
4 . Installation ........................................................... 4
4.1 Installation Checklist ...................................... 4
4.1A Power Accessibility .................................. 5
4.1B Space ....................................................... 5
4.1C Low Voltage Wiring ................................. 5
4.1D Back-Draft Damper ................................. 5
4.1E Support Structure and Suspension ............ 5
4.2 Electrical Requirements .................................. 5
4.3 Condensate Removal ...................................... 6
4.3A Lifting Condensate ................................... 6
4.3B Condensate Pump Kit .............................. 6
4.4 Ducting ......................................................... 6
4.4A Fresh Air/Supply Air ................................. 7
4.4B Ducting for Fresh Air - Option ................. 7
4.4C Installation in a Basement or Crawlspace . 8
4.4D Installation in an Attic ............................. 8
4.4E Installation in a Structure with
No Forced Air HVAC System............................. 9
4.4F Ducting for High Efciency Filtration ........ 9
4.5 Compressor Release and Noise Abatement...... 9
4.6 Controls ....................................................... 10
5. Control Package Diagram Sheet........................... 11
6. Maintenance ...................................................... 12
6.1 High Efciency Air Filter ............................... 12
6.2 Optional Fresh Air Intake .............................. 12
7. Wiring Diagrams ................................................ 13
8. Optional Parts List .............................................. 14
9. Service Parts List ................................................ 14
Routine Maintenance ......................................... 14
10. Service ............................................................. 15
10.1 Technical Description ................................. 15
10.2 Troubleshooting .......................................... 15
10.3 Refrigerant Charging .................................. 16
10.4 Compressor/Capacitor Replacement ........... 17
10.5 Electric Ventilation Damper ........................ 17
Warranty ................................................................ 18

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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 benet from your
Quest DRY 70.
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 water source; be certain there is no chance the unit
could fall into the water or get wet. The unit should also be 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 (see
local regularity code for more information).
• Never operate a unit with a damaged power cord. If the power cord is
damaged it must be replaced by the manufacturer, its service agent, or
similarly qualied person in order to avoid a hazard.
• The unit shall be installed in accordance with national wiring
regulations.
• Do not obstruct the air intake and exhaust. Maintain a .3 m (1 ft)
clearance around the air intake and exhaust.
• This appliance is not intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of
experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for
their safety. Children should be supervised to ensure that they do not
play with the appliance.
FOR HVAC INSTALLER AND OWNER

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Quest DRY 70 Installation, Operation and Maintenance Instructions
1. Intended Application for Quest Dry 70
For the ideal installation, draw air from the central part of the workspace and return it to isolated areas of the
structure. The ductwork of the existing heating system can be used to supply air to the workspace.
2. Registrations
The Quest Dry 70 conforms to unied standard UL 60335-2-40.
3. Specications
Part Number: 4033750
Blower: 150 CFM @ 0.0" WG
Power: 680 Watts @ 80°F and 60% RH
Supply Voltage: 110-120 VAC – 1phase – 60 Hz
Current Draw: 5.1 Amps
Energy Factor: 2.37 l/kw
Operating Temp.: 33°F to 100°F
Sized for: 1800 Sq. Ft. - Workspace (Max)
Miniumum Performance at 80°F and 60% RH
Water Removal: 65 pints/day
Efficiency: 4.5 Pints/kWh
Air Filter: MERV-11
Efficiency: Standard 70% Efficient
ASHRAE Dust Spot Test
Size: 12" x 12" x 1"
Power Cord: 8', 110-120 VAC, Grounded
Drain Connection: 3/4" Threaded MPT
Drain Hose: 5/8" ID x 8'
Dimensions
Unit Shipping
Width: 12"15 5/8"
Height: 12" 16"
Depth: 28"31 5/8"
Weight: 55 lbs 65 lbs
4. Installation
4.1 Installation Checklist
CAUTION
Prior to installation of the Quest Dry 70, please review the following requirements. The Quest Dry 70 can
be installed in a variety of locations to meet the owner’s needs, and be integrated with existing forced air
systems or existing ductwork if desired. The location choice is contingent on a variety of requirements not
limited to: ease of service, controls access, drainage, ltration, power, fresh-air ventilation (optional), water
damage prevention, and current regulatory codes (ASHRAE, re, etc). Please address all of these issues
before you select the location of the device.
FOR HVAC INSTALLER ONLY

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Quest DRY 70 Installation, Operation and Maintenance Instructions
4.1A Power Accessibility
Unit should be located in an area where the cord’s length (8') should easily reach a 110-120 VAC electrical
outlet with a minimum of a 15 A circuit capacity.
4.1B Space
Location should have enough clearance to handle the unit’s overall dimensions as well as the necessary
return/supply ductwork to the unit.
4.1C Low Voltage Wiring
Unit location should be in an area where eld wiring the remote controls (low voltage) to the unit will be
possible.
4.1D Back-Draft Damper (P/N 4023647)
It is recommended that a back-draft damper be used in the discharge duct of the Quest Dry 70, especially
when connecting to the supply ducting system. The back-draft damper prevents supply air from counter
owing through the Quest Dry 70 when it is not operating. The unit location should be chosen to allow
installation of this accessory.
4.1E Support Structure and Suspension
Place the Quest Dry 70 on supports to raise the base of the unit. Do not place the Quest Dry 70 directly on
structural building members without vibration absorbers or unwanted noise may result.
The Quest Dry 70 may be suspended with a hang kit (4028111)
or a suitable alternative from structural members, as long as
the suspending assembly supports the Quest Dry 70’s base in
its entirety. Do not hang the Quest Dry 70 from the cabinet.
Remember to place a drain pan under the unit if it is suspended
above a nished area or above an area where water leakage
could cause damage.
4.2 Electrical Requirements
WARNING!
WARNING: DO NOT ALLOW THE YELLOW
LEAD FROM THE Quest TO CONTACT THE RED
LEAD FROM THE Quest OR DAMAGE TO THE
TRANSFORMER WILL RESULT.
The Quest Dry 70 plugs into a common grounded 115VAC outlet. The device draws 5.1 Amps under normal
operating conditions. If used in an area which may become wet, a GFCI (Ground Fault Interrupt) outlet is
required. Please, consult local electrical codes for any further information.
Therma-Stor LLC offers a family of control devices for use with the Quest Dry 70. The controls are to be
located remotely from the unit and located in the space to be conditioned. The controls are low voltage (24
volt) and should be connected to the Quest Dry 70 with low voltage wire (thermostat or other
appropriate).
CAUTION
Do not install the control panel where it may not accurately sense the relative humidity such
as near HVAC supply registers, near exterior doors, on an outside wall, near a window, or
near a water source.
Hang Kit (4029908) shown suspending a Quest Dry 70.
Available from your dealer or call 1-800-533-7533.
Quest DEH 3000
Digital Control (P/N
4027370)
Call 1-800-533-7533
FOR HVAC INSTALLER ONLY

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Quest DRY 70 Installation, Operation and Maintenance Instructions
The installer must supply the wiring between the Quest Dry 70 and the control panel. Be sure to safely route
the control wiring to prevent damage during installation.
CAUTION
Do not cross wires when connecting the Quest Dry 70 and the remote control panel or damage to the
transformer may result. The remote controls of the Quest Dry 70 are powered by a low voltage circuit
(24VAC) and must NEVER contact or be connected to a high voltage circuit.
The control wires leaving the Quest Dry 70 and the remote control panels are numbered and color-coded to
prevent confusion. Some of the control wires leaving the Quest Dry 70 may not be used with certain control
panels and should be left unconnected with wire nuts taped onto the stripped ends for safety. Be sure to
consult the electrical schematic in this manual or inside the access panel of the Quest Dry 70 before making
control connections.
4.3 Condensate (Water) Removal
CAUTION
A trap in the drain line is preferred, but not required for the unit to drain properly. Local codes may require
a trap. Use care to keep the pipe assembly as at to the oor as possible. Kinks and/or humps will prevent
proper drainage.
The Quest Dry 70 generates condensate. Install a 3/4" male nominal pipe thread adapter to the drain pan.
It is necessary to assemble your own drain pipe assembly utilizing 3/4" PVC pipe to get the condensate to a
oor or other drain. Pipe is commonly available in 10’ lengths from building supply, plumbing or hardware
stores. Slope to drain should be at least 1” drop for every 10’ of run.
4.3A Lifting Condensate
A condensate pump may installed if lift is required to dispose of the condensate.
4.3B Condensate Pump Kit (4030113)
A condensate pump kit is available from the factory for use
with the Quest Dry 70 and provides 15' of lift. Condensate is
automatically pumped to a remote location when the water level
in the pump’s reservoir rises to close the oat switch. The pump
also contains a safety oat switch. The white leads from this switch
extend from beneath the pump cover. This switch should be
installed in series with the eld wire that connects the blue (#5)
lead from the Quest Dry 70 to the the control panel. If the pump
fails, this switch opens the compressor control circuit and stops
water production before the reservoir overows. The Quest Dry 70
will continue to ventilate or circulate air as normal, but will not
dehumidify until this switch closes.
4.4 Converting to Vertical Discharge Airow
The QuestDry 70 is shipped from the factory with the exhaust
panel of the cabinet congured for horizontal air discharge. The cabinet can be easily converted to vertical
air discharge. To convert the air discharge from horizontal to vertical, follow these steps:
Condensate Pump Kit (4030113) shown installed. Available
from your dealer or call 1-800-533-7533.
FOR HVAC INSTALLER ONLY

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Quest DRY 70 Installation, Operation and Maintenance Instructions
1. Using T-20 Torx Driver, remove three (3) sheet metal screws that attach the exhaust panel from each side
of the Quest Dry 70. There will be a total of six (6) screws. Do not remove the exhaust collar.
2. Remove the exhaust panel.
3. Rotate the exhaust panel so that the exhaust collar is located on the top of the unit. Align screw holes
and snap the panel onto the base.
4. Secure the exhaust panel to the base by replacing the six (6) screws.
For the ideal installation, draw air from the central part of the workspace and return it to the isolated areas
of the workspace like the bedrooms, den, utility room, or family room. The ductwork of the existing heating
system can be used to supply air to the workspace. If the existing supply goes to isolated areas of the
structure, discharge the supply of the Quest Dry 70 into the supply of the existing heating system. Installation
of a separate supply duct to the Quest Dry 70 from a central area is recommended.
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4.4A Supply Air
CAUTION
DO NOT draw air directly from the kitchen, laundry, or isolated basement.
You may draw air from a basement that is open to the workspace. All exible ducting connected to the
Quest Dry 70 should be UL listed.
A short piece of exible ducting on all Quest Dry 70 duct connections is recommended to reduce noise and
vibration transmitted to rigid ductwork in the structure. Ducting the Quest Dry 70 as mentioned requires
consideration of the following points:
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ow.
Connecting to existing HVAC systems: An optional 8" check backdraft damper is available from the factory
to prevent reverse air ow through the Quest Dry 70. If the Quest Dry 70 is ducted to the supply of an air
handler, the check damper should be placed in the Quest Dry 70 supply duct.
CAUTION
Contact the factory when connecting to a static pressure of greater than or equal to +.5" WG.
4.4B Ducting for Fresh Air — Option
Fresh air may be brought into the structure by connecting an insulated duct from outside the structure to the
6" inlet of the Quest Dry 70. Advantages of this form of ventilation include:
1. Outside air is ltered before entering the building.
2. Outside air will be dehumidied before entering the building if the Quest Dry 70 is running in
dehumidication mode.
3. Drawing air from outside and blowing inside aids in slightly pressurizing the structure. This helps
prevent dirty and humid air from entering elsewhere. It also reduces the potential for carcinogenic
radon gas to enter and provides a small amount of make-up air for open combustion and exhaust
devices like the clothes drier, replace, and water heater.
4. Exhaust fans are recommended in the bath rooms and kitchen.
In cold climates or areas where the outdoor dew point is low at times, ventilation can be used to dehumidify
the structure, making the Quest Dry 70 capable of year-round drying. This is accomplished by bringing
the dry, low dew point air into the structure during these times. This approach is often more economical
than running the dehumidier to remove excess moisture from the structure. In cold climates, adequately
ventilating is critical to reduce the inside moisture content and avoid moisture accumulating in the wall
cavities. TIP: If your house experiences condensation on the interior surface of the windows during the
winter, increasing the amount of ventilation will often solve the problem.
An insulated 6" diameter duct is generally sufcient to provide up to 70 CFM of outside air. Large quantities
of outside air will impact Quest Dry 70 performance positively or negatively, depending upon the inside and
outside air conditions. The outside air duct should be connected to the front of the unit. With a standard tee,
the amount of outside air can be restricted with a blade damper.
FOR HVAC INSTALLER ONLY

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Quest Dry 65
Indoor Air
Return
Quest DEH 3000
control
Heating/AC Return Air
Backdraft
Damper
Dry Air to
Basement
Gravity
Damper
Motorized
Damper
Optional
Fresh Air
Intake
4.4C Installation in a Basement or Crawlspace with an Existing Forced Air HVAC System.
Basement Installation: Install a separate 8" return for the Quest Dry 70 in a central area of the structure.
Optional: Duct the supply of the Quest to a 8" x 8" x 8" tee/damper, adjusted to 20% open to the basement.
Duct the other side of the tee to the air supply of the existing HVAC system with a backdraft damper.
Crawlspace Installation: Install a separate return for the Quest Dry 70 in a central area of the structure.
Optional: Duct the supply of the Quest Dry 70 to a 8" x 8" x 8" tee/damper that is 20% open to the crawlspace
if desired. Duct the other side of the tee to the air supply of the existing HVAC system with a backdraft
damper.
Instead of installing a separate return to the Quest Dry 70, and if the existing system has multiple returns, it
is possible to select one to disconnect from the existing forced air system and use it for the dedicated Quest
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 or,
alternatively, install a separate return from the open part of the house.
4.4D Installation in an Attic with an Existing Forced Air HVAC System
CAUTION
ALWAYS place a drain pan under the unit if it is suspended above a nished area or above an area where
water leakage could cause damage.
FOR HVAC INSTALLER ONLY

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The preferred method of installation is to create a separate return for the Quest Dry 70 in a central area of
the structure. Duct the supply of the Quest Dry 70 to the air supply of the existing HVAC system.
4.4E Installation in a Structure with No Existing Forced Air HVAC System
When installing the Quest Dry 70 in a structure that does not have a forced air HVAC system, a single return
for the Quest Dry 70 should be installed in central open area of the structure. DO NOT locate the return
in a bathroom or a kitchen. The supplies of the Quest Dry 70 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 Quest Dry 70 to be ltered and dehumidied. A 6" diameter duct is recommended for branches to the
bedrooms. A 8" diameter duct is recommended for branches to larger areas.
4.4F Ducting for High Efciency Filtration
The Quest Dry 70 is equipped with a high efciency MERV 11 media lter (P/N 4027158). For optimal
performance it is recommended that the lter be replaced every 3-6 months.
4.5 Noise Abatement
A length of 10 feet or more of ex ducting on the outlet of the Quest Dry 70 will reduce air noise from the
fan. A length of exible ducting on all Quest Dry 70 duct connections is recommended to reduce noise
transmitted to rigid ductwork in the structure.
FOR HVAC INSTALLER AND OWNER
Quest
Indoor Air Return
Quest
Air Supply
Heating & A/C Unit
Indoor
Air
Return
Indoor Air Supply
Backdraft
Damper
Motorized
Damper
Optional
Fresh Air
Intake
Quest DEH 3000
control

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Control Part No. 4027370
FOR HVAC INSTALLER ONLY
4.6 Controls
The Quest Dry 70 features a built-in dehumidistat control as well as the ability to wire a remote mounted
control to the unit. The control used to operate the unit should be located in an area where the control can
accurately sense the humidity of the area where humidity control is desired.
If the Quest Dry 70 is located in the area where humidity control is desired, consider using the built-in
control. Adjust the humidity control so that the unit maintains the desired level of humidity.
If the Quest Dry 70 is located outside of the area where humidity control is desired, consider using a remote
wired humidity controller that is located in the area where humidity control is desired.
When using a remote wired dehumidistat, be sure the built-in dehumidistat is set to the off position by turning
it counterclokwise until it stops. Failure to do so may cause the unit to sense the humidity from the wrong
area.
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 Quest dehumidier is controlled using ve color-coded wires.
Green (or brown) = Fan control
Blue = Dehumidication (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 transformer. 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 dehumidier.
• To turn the dehumidier 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.

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FOR HVAC INSTALLER AND OWNER
Quest
Dehumidifier
RED
4201 Lien Rd. Madison, WI 53704 •TOLL-FREE 1-800-533-7533 •www.thermastor.com •[e-mail]
TS-234, 11/09
WARNING: Allowing yellow wire to contact red or white wire
will destroy the transformer.
Dehumidifier on : Connect yellow and blue wires.
Fan only on : Connect yellow and green (or brown) wires.
Accessory power : 24volt AC power supply available for HVAC accessories between yellow and
white(and/or red) wire. Red and white wires are common with each other.
Quest DEH 3000 dehumidification & ventilation control
YELLOW
BLUE
GREEN or BROWN
WHITE
Internal Connections
OPTIONAL
DAMPER
24 VAC
DMP COMP FAN
5 Control Package Diagram

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6. Maintenance
6.1 High Efciency Air Filter
The Quest Dry 70 is equipped with a MERV 11 media lter. This lter should be checked every three
months. Operating the unit with a dirty lter will reduce dehumidier capacity and efciency and may cause
the compressor to cycle off and on unnecessarily on the defrost control.
DO NOT operate the unit without a lter or with a less effective lter. Operating the unit without a lter
or with a less effective lter may cause internal damage to the unit and invalidate the product warranty.
6.2 Optional Fresh Air Intake
Check and clean the screen on the outdoor fresh air intake port seasonally. The screen may become plugged
during the seasons when there are many particles in the outdoor air.
To replace the lter, remove the lter door from one of the sides of the Ultra-Aire 70H by pushing the snap
button in and gently pulling to door away from the body of the unit, then pulling up to disengage the door
ange from the slot, removing the door.
Remove the lter by gently pulling straight out of the unit. Insert new lter in the same manner, pushing it
gently straight into the unit.
Replace lter door by inserting the bottom tab into the slot, aligning the door and pushing it gently against
the unit until the snap button secures the door.
FOR HVAC INSTALLER ONLY

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7. Wiring Diagram

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FOR HVAC INSTALLER ONLY
Part No. Description
4030671 Air Filter MERV 11
4030734 4Pack
4030733 12Pack
The Quest Dry 70 is equipped with a MERV 11 media lter. This lter should be checked
every three months. Operating the unit with a dirty lter will reduce dehumidier capacity
and efciency and may cause the compressor to cycle off and on unnecessarily on the
defrost control.
FOR OWNER – ROUTINE MAINTENANCE
8. Optional Parts List: Quest Dry 70
Part No. Description
4030671 Filter MERV 11
4030113 Pump Kit
4029908 Hang Kit
4023647 8" Gravity Damper
4020646 8" Buttery Damper
4027415 8" Flex Duct
4020177 8" Flex Duct (insulated)
4027430 Register Head 8"
4020126 Register Grill (White)
9. Service Parts List: Quest Dry 70
Part No. Description
4029567 Compressor
4029568 Compressor Overload
4022484 Compressor Relay
4033032-03 Capacitor 35 MFD
4033031-03 Capacitor 6 MFD
4033358-02 Coil Set
4031384 Impeller Fan
4020924 Fan Relay
4027172 Control, Humidity
4031376 Defrost Thermostat
??????? Timer Relay
4026221 Leveling Feet
4022487 Transformer

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10. Service
CAUTION
CAUTION: Servicing the Quest Dry 70 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. Please
contact your HVAC professional.
10.1 Technical Description
The Quest Dry 70 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 condenser coil (See Figure 1). 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 strainer 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 ooded condition, which means that all the
evaporator tubes contain liquid refrigerant during
normal operation. A ooded evaporator should
maintain nearly 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.
10.2 Troubleshooting
Neither fan nor compressor running.
Dehumidication 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. Dehumidication is being called for. No fan call.
1. Defective compressor run capacitor.
2. Loose connection in compressor circuit.
3. Defective compressor overload.
4. Defective compressor.
5. Defrost thermostat open.
Compressor cycles on and off. Dehumidication 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 lter(s) or air ow restricted.
Refrigeration System of Quest Dry 70
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Fan is not running. Dehumidication 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 dehumidication capacity (evaporator is frosted continuously). Dehumidication is being called for
1. Defrost thermostat defective.
2. Low refrigerant charge
3. Dirty air lter(s) or air ow 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.
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.
3. Unit has entered defrost cycle.
4. Air lter dirty.
5. Defective defrost thermostat.
6. Low refrigerant charge.
7. Air leak such as loose cover or ducting leaks.
8. Defective compressor.
9. Restrictive ducting.
10.Optional Condensate Pump Safety Switch open.
Unit Test to determine problem:
1. Detach eld control wiring connections from main unit.
2. Connect the yellow and green pigtails from the main unit together; only the fan should run. Disconnect
the wires.
3. Connect the yellow and blue pigtails from the main unit together; the compressor and fan should run.
4. If these tests work, the main unit is working properly. You should check the control panel and eld
control wiring for problems next.
5. Remove the control panel from the mounting box and detach it from the eld installed control wiring.
Connect the blue, yellow, and green wires from the control panel directly to the corresponding colored
pigtails on the main unit. Leave the violet, white and red wires disconnected!
6. Turn on the fan switch; the fan should run. Turn off the fan switch.
7. Turn on the humidity control; the compressor and fan should run.
8. If these tests work, the problem is most likely in the eld control wiring.
10.3 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.
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10.4 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 qualied service person.
10.5 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 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 sufcient time for the damper
to cycle. The damper will take approximately one 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 ONLY

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Quest DRY 70 Installation, Operation and Maintenance Instructions
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Quest DRY 70 Installation, Operation and Maintenance Instructions
Quest DRY 70 Dehumidier Limited Warranty
WARRANTOR:
Therma-Stor LLC
4201 Lien Rd
Madison, WI 53704
Telephone: [phone]
WHO IS COVERED: This warranty extends only to the original residential end-user of the Quest Dry 70 dehumidifier, and
may not be assigned or transferred.
FIRST YEAR WARRANTY: Therma-Stor LLC warrants that, for one (1) year after date of original purchase the Quest Dry
70 Dehumidifier will operate free from any defects in materials and workmanship. Therma-Stor LLC’s exclusive obligation
under this warranty will be to supply, without charge, a replacement for the dehumidifier which is found to be defective
within a one (1) year period from date of purchase and which is returned not later than thirty (30) days after said one (1) year
period to Therma-Stor LLC, Madison, WI together with proof of purchase of the dehumidifier.
SECOND THROUGH FIFTH YEAR WARRANTY: Therma-Stor LLC further warrants that for a period of five (5) years,
the condenser, evaporator, and compressor of the Quest Dry 70 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), provided that all labor and
transportation charges for the part(s) shall be borne by the end-user.
END-USER RESPONSIBILITIES: If warranty service is to be performed on the Quest Dry 70, a technician authorized by
Therma-Stor LLC must perform such service. If the End-user is unable to locate or obtain warranty service from an authorized
technician, he should call Therma-Stor LLC at the above number and ask for the Service Department, which will then arrange
for covered warranty service. Warranty service will be performed during normal working hours.
The End-user must present proof of purchase (lease) upon request, by use of the warranty card, receipt, invoice or other
reasonable and reliable means. The end-user is responsible for normal care. This warranty only applies to residential
applications, and is void if the Quest Dry 70 Dehumidifier is used in commercial and/or industrial applications including but
not limited to water treatment facilities and industrial process applications. This warranty is void if the Quest Dry 70 is used
in any swimming pool application. This warranty does not cover any defect, malfunction, etc. resulting from misuse, abuse,
lack of normal care, corrosion, freezing, flooding, tampering, modification, unauthorized or improper repair or installation,
accident, acts of nature or any other cause beyond Therma-Stor LLC’s reasonable control.
LIMITATIONS AND EXCLUSIONS: If any Quest Dry 70 Dehumidifier part is repaired or replaced, the new part shall
be warranted for only the remainder of the original warranty period applicable thereto (but all warranty periods will be
extended by the period of time, if any, that the Quest Dry 70 Dehumidifier is out of service while awaiting covered warranty
service).
UPON THE EXPIRATION OF THE WRITTEN WARRANTY APPLICABLE TO THE Quest Dry 70 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 SANTA FE 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.
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.
LEGAL RIGHTS: This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.