thermastor Quest 110 Dual Manual

Quest Dry
Quest 110/150 Dual
Installation, Operation and Maintenance Instructions
This manual is provided to acquaint you with the
dehumidifier 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 dehumidifier is built around tested
engineering principles and has passed a thorough inspection
for quality of workmanship and function.
Installation, Operation and Maintenance Instructions
4201 Lien Rd
Madison, WI 53704 Toll-Free 1-877-420-1330
www.QuestClimate.com [email protected]
– Read and Save These Instructions –
Specifications subject to change without notice. 1
Features:
• High capacity
• High efficiency
• Environmentally friendly
• Small Footprint
TS-1175
09/20 Rev. A
Water Removal Rates (Pints/Day) @ 80°F 60% (AHAM)
Dehumidifier Pints Removed Gallons/Liters
110 Dual 110 13.75/52
150 Dual 150 18.75/71
Patent: thermastor.com/patents
Quest 110
Quest 150

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Quest 110/150 Dual Installation, Operation and Maintenance Instructions
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Table of Contents
Safety Precautions.................................................................... 3
1. Intended Application.............................................................4
2. Registrations ........................................................................4
3. Specifications .......................................................................4
4. Installation ........................................................................ 5
4.1 Location ........................................................................ 5
4.2 Electrical Requirements............................................... 5
4.3 Condensate Removal ................................................... 6
4.4 Hanging Diagram ......................................................... 6
4.5 Ducting ........................................................................ 7
4.5A Supply Duct Kit ................................................ 7
4.5B Return Duct Kit ................................................ 7
5. Controls ........................................................................ 7
5.1 On board dehumidistat ................................................. 7
5.2 Fan Switch ..................................................................... 7
6. Maintenance ........................................................................8
6.1 Standard Air Filter.........................................................8
6.2 Impeller Fan Oiling.......................................................8
7. Service ........................................................................8
7.1 Warranty ........................................................................8
7.2 Technical description.....................................................8
7.3 Troubleshooting............................................................. 9
Wiring Diagram ........................................................................11
Service Parts List .....................................................................12
Accessory/Replacement Parts ...............................................12
Warranty .......................................................................13

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Quest 110/150 Dual Installation, Operation and Maintenance Instructions
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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 benefit from your Quest Dual Dehumidifier.
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 back or side panels for
maintenance and service. DO NOT INSTALL UNIT WITH THE
SERVICE PANELS INACCESSIBLE.
• Avoid directing the discharge air at people, or over the water in pool areas.
• If used near a pool, spa or water; be certain there is NO chance the unit
could fall into the water, be splashed and that it is plugged into an outlet
that is a GROUND FAULT INTERRUPT protected circuit.
• DO NOT use the device as a bench or table.
• DO NOT place the device directly on structural members. Provide
vibration isolation in order to minimize operational vibration and/or noise.
• 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
• 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 qualified person in order to avoid a hazard.
• Make all electrical connections in accordance with the current edition of
the NEC ANSI/NFPA 70 and any national and local codes or ordinances
that may apply.
• Maintain a minimum 1ft. (.3m) clearance to avoid obstructing the air
return and supply.
• 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.

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1. Intended Application for Quest Dual
The Quest Dual Dehumidifier is designed to operate in temperatures between 56° and 95°F.
In order to eciently control humidity levels, the area in which the dehumidifier is to be operated must be free of water
intrusion or excessive fresh (outside) air infiltration. Before installing the Quest Dual Dehumidifier, water intrusion and air
infiltration problems should be addressed or noted in calculations.
2. Registrations
The Quest Dual units conforms to unified standard UL 60335-2-40 and CSA standard C22.2.60335-2-40.
Patent: thermastor.com/patents
3. Specifications @ 80°F/60% RH
Unit: 4034220 110 Dual 4034230 150 Dual
Blower:
(Tested with duct collars on) 365 CFM @ 0.0" WG 430 CFM @ 0.0" WG
Power: (Watts) 830 1300
Supply voltage: 115 VAC -
1 Phase - 60 Hz. 115 VAC - 1 Phase - 60 Hz.
Current Draw: (Amps) 7.1 11.0
Energy Factor: (L/kWh) 2.8 2.3
Operating Temp: 56°F Min - 95°F Max 56°F Min - 95°F Max
Water Removal: (Pints/Day)
Eciency: (Pints/kWh) 110 5.8 150 4.8
Air Filter: (MERV-8 Nominal) Size: 14" x 17.5" x 2" Size: 14” x 17.5” x 2”
Power Cord:
10’ 14/3 SJTW
NEMA 5-15P NEMA 5-15P
Drain Connection: 3/4” Threaded NPT 3/4” Threaded NPT
Refrigerant Type:
Refrigerant Amount:
R410A
1lb. 9oz. R410A 1lb. 10oz.
Dimensions:
Width:
Height:
Length:
Weight:
Unit Shipping
14.5" 19"
19.4" 25"
26" 35"
85 lbs 95 lbs
Unit Shipping
14.5” 19”
21” 27”
26” 35”
95 lbs 100 lbs

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4. Installation
4.1 Location
The Quest Dual Dehumidifier can be installed in a variety of locations to meet the owner’s needs as listed below. In all
cases keep the following cautions in mind:
• It is designed to be installed INDOORS IN A SPACE THAT IS PROTECTED FROM RAIN AND FLOODING.
• Install the unit with space to access the back and side panels for maintenance and service and also to allow easy
access to the filter cover panel. DO NOT INSTALL UNIT WITH THE FRONT PANEL OR FILTER COVER
PANEL INACCESSIBLE.
• Avoid discharging the air directly at people, or over the water in pool areas.
• Be certain there is NO chance the unit could fall into water or be splashed and that it is plugged into a GROUND
FAULT INTERRUPTER.
• DO NOT use the Quest Dual Dehumidifier as a bench or table.
• DO NOT place the Quest Dual Dehumidifier directly on structural members. Provide vibration isolation in order to
minimize operational vibration and/or noise.
• A drain pan MUST be placed under the unit if installed above an area where water leakage could cause damage.
• Maintain a minimum 1ft. (.3m) clearance to avoid obstructing the air return and supply.
• Place the Quest Dual Dehumidifier on supports that raise the base of the unit 2.5” above the drain pan to a P-trap
can be installed. See Section 4.3.
• The Quest Dual Dehumidifier may be suspended with steel hanger, straps, or a suitable alternative from structural
members, unit must be supported from underneath. Don’t hang from sides or ends. See section 4.4
4.2 Electrical Requirements
The Quest Dual Dehumidifier plugs into NEMA rated Receptacles. The amp draws for each unit under normal operating
conditions are listed on page 4. A ground fault interrupter protected circuit is required.
CAUTION! For proper drainage, the unit must be mounted so the drain outlet is at least 4”
above the floor drain, and must be fully supported under the base.

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4.3 Condensate Water Removal
Condensate drains by gravity via the drain port. Use 3/4” male NPT PVC pipe. A p-trap is recommended at the time
of install, see diagram below. An optional condensate pump kit may be installed if a lift is required to dispose of the
condensate. Optional parts list for information on the kit.
4.4 Hanging Diagram
AB
B
A
A
A
A
A
B
B
P-trap
(see section 4.5 for more info)
Bottom view
of unit and
bracket Bracket
(4036568)
note: plumb
condensate water
to drain or
reclamation
reservoir
AB
B
A
A
A
A
A
B
B
P-trap
(see section 4.5 for more info)
Bottom view
of unit and
bracket
Bracket
(4036568)
note: plumb
condensate water
to drain or
reclamation
reservoir
Hanging not required, floor installation is ok
P-Trap not included

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4.5 Ducting
4.5A Supply Duct Kit (P/N 4033039)
A factory designed supply duct kit can be purchased to accept 10” ducting to both outlets of the Quest Dual. Contact
your dealer or call 1-877-420-1330 to order or go to www.questclimate.com/product-category/accessories.
4.5B Return Duct Kit (P/N 4039697)
A factory designed return duct kit can be purchased to accept 12” ducting. Contact your dealer or call 1-877-420-1330
to order or go to www.questclimate.com/product-category/accessories.
*Recommended 25’ max run on both supply/return ducting.
5. Control Options
5.1 On Board Dehumidistat
The humidity control is an adjustable switch that closes when the relative humidity of the air in which it is located rises to
the dial set point. It opens when the RH drops 4 to 6% below the set point.
Approximate Humidity Levels Per Setting:
“Drier” 20% to 30% Relative Humidity
“Normal” 45% to 55% Relative Humidity
(Recommended)
“Humid” 80% to 90% Relative Humidity
The dehumidifier will run until the relative humidity (RH) is reduced to the humidity control dial setting.
Quality humidity meters are available from the factory and are recommended to accurately monitor humidity levels.
Refer to the options and accessories table in this document.
5.2 Fan Switch
Turning the impeller switch to “FAN ON” will cause the unit’s internal impeller to run continuously, whether the unit is
dehumidifying or not. This function is desirable if the unit is used for air circulation.
Turning the fan switch to “FAN AUTO” will cause the unit’s internal blower to run only while the unit is dehumidifying.
4031882

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6. Maintenance
WARNING! NOTE: Do not operate the unit without the filter or with a less eective filter.
The heat exchange coils inside the unit could become clogged and require disassembly to clean.
Filter non-compliance invalidates the product warranty.
6.1 Standard Air Filter
The Quest Dual Dehumidifier ships with a standard MERV 8 ecient pleated fabric filter. This filter should be checked
every six months. Operating the unit with a dirty filter will reduce dehumidifier capacity and eciency and may cause the
compressor to cycle o and on unnecessarily on the defrost control.
To access the air filter, remove the filter access panel from the end of the Quest Dual Dehumidifier. The filter should be
readily visible and can be removed by pulling it straight out of the Quest Dual Dehumidifier.
We recommend changing the filter at least every 6 months. For agriculture we recommend changing the filter with every
grow cycle.
6.2 Impeller Fan Oiling
The impeller fan motor is factory lubricated for many years of normal operation, and no further oiling is required.
7. Service
WARNING! Servicing the Quest Dual 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.
CAUTION: If the supply cord is damaged, it must be replaced by the manufacturer, its service
agent or similarly qualified person in order to avoid a hazard.
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 1-877-420-1330 for warranty claim authorization and technical assistance.
7.2 Technical Description
The Quest Dual 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. 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.

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Quest 110/150 Dual Installation, Operation and Maintenance Instructions
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7.3 Troubleshooting
FOR THE USER:
If the unit does not work properly, please check the following:
— Is the unit unplugged?
— Is power to outlet on? (check switch, if applicable)
— Is circuit breaker tripped?
— Is humidity control set? (turn to “ON”)
— Is air flow restricted? (check air filters and grill)
If none of the above, call dealer or 1-800-533-7533.
FOR THE HVAC PROFESSIONAL:
No dehumidification. Neither blower, nor compressor run with fan switch AUTO.
1. Unit unplugged or no power to outlet, circuit breaker tripped.
2. Humidity control set to “Humid” setting.
3. Loose connection in internal wiring.
4. Humidity control is defective.
No dehumidification. Compressor does not run but blower runs with fan switch AUTO and humidity control turned to
ON.
1. Defrost thermostat open, ambient temperature too low.
2. Loose connection in compressor circuit.
3. Defective compressor overload.
4. Defective compressor or compressor run capacitor.
Blower runs with fan switch AUTO but compressor cycles on & o.
1. Low ambient temperature and/or humidity causing unit to cycle through defrost mode.
2. Defrost thermostat defective.
3. Defective compressor overload.
4. Defective compressor.

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Blower does not run with fan switch in either position. Compressor runs briefly but cycles on and o.
1. Loose connection in blower circuit.
2. Obstruction prevents impeller rotation.
3. Defective blower.
4. Defective blower switch.
Evaporator coil frosted continuously, low dehumidifying capacity.
1. Dirty air filter or air flow restricted.
2. Defrost thermostat loose or defective.
3. Low refrigerant charge.
If none of the above has fixed the issue, call technical support at 1-800-533-7533.

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Wiring Diagrams
115 VAC, 60 Hz, SINGLE PHASE
BLK
BLK BLU
WHT
GRN
GRN
YEL
RED
FAN SWITCH
DEFROST
THERMOSTATS
IMPELLER
COMPRESSOR
3
1
2
BLK BLK
ORG
S
CR
GRN
FAN ON
FAN AUTO
DEHUMIDISTAT
CAPACITOR
4035828
BRN
BLK
BLK
WHT
RELAY COMP
BLK
BLK
Quest 110 - 4034052 Rev. A
Quest 150 - 4035828 Rev. A

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Service Parts List
Call your dealer or 1-800-533-7533.
Part No Description
4034887-04 Evaporator (110)
4033859-04 Evaporator (150)
4035474 Compressor (110)
4030131 Compressor (150)
4029510 Filter/drier
4035868 Condenser (110)
4034099 Condenser (150)
4026360 Impeller (110)
4035463 Impeller (150)
4033032-06 50mfd 370V Capacitor - Compressor
4035235-04 7.5mfd 370V Capacitor - Impeller (110)
4035235-10 12mfd 370V Capacitor - Impeller (150)
4026221 Leveling Foot
4041848 Defrost Thermostat
4027172 Humidity Controller
4025560 Fan Switch
4036568 Bracket
1970010 Relay
4025569 Hose Adapter
4025577 Hose
Accessory/Replacement Parts
Call your dealer or 1-800-533-7533.
Part No Description
4031062 Filter MERV 8
4038125 Filters 12-Pack, MERV 8
4022220 Pump Kit
4033039 Duct Kit, Supply
4039697 Duct Kit, Return

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Quest Dual Dehumidifier Limited Warranty
WARRANTOR:
Therma-Stor LLC
4201 Lien Rd
Madison, WI 53704
Telephone: [phone]
WHO IS COVERED: This warranty extends only to the original end-user of the Quest Dual dehumidifier, and may not
be assigned or transferred.
FIRST YEAR WARRANTY: Therma-Stor LLC warrants that, for one (1) year the Quest Dual 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.
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 Dual 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: Warranty service must be performed by a Servicer authorized by Therma-Stor LLC.
If the end-user is unable to locate or obtain warranty service from an authorized Servicer, he should call Therma-Stor
LLC at the above number and ask for the Therma-Stor LLC 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 or other reasonable and
reliable means. The end-user is responsible for normal care. 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.
LIMITATIONS AND EXCLUSIONS: If any Quest Dual 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 Dual Dehumidifier is out of service while awaiting covered
warranty service).
UPON THE EXPIRATION OF THE WRITTEN WARRANTY APPLICABLE TO THE Quest Dual 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 Quest Dual 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.