Quest Engineering 100 Manual

INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
QUEST
100
QUESTCLIMATE.COM / [phone]
Patents: thermastor.com/patents
Serial Number
Install Date
Sold By
06/23 REV A
Compact Size
Digital Controls
Industry-Leading Efficiency
Superior MERV-13 Air Filtration
Ducting Options for Divided Spaces
Auto-Restart After Power Outages
CALIFORNIA
TITLE 24 COMPLIANT

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QUEST 100 INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
QUESTCLIMATE.COM(877) 420-1330
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 Ducting...................................................................5
4.3 Condensate Water Removal ...............................9
4.4 Hanging Diagram ............................................... 10
4.5 Electrical Requirements.................................... 11
Control Options................................................................ 12
5.1 (A) Onboard Dehumidistat ................................ 12
5.1 (B) External Control Options ............................ 13
5.2 External Control.................................................. 14
6. Maintenance ................................................................ 14
6.1 Standard Air Filter............................................... 14
6.2 Impeller Fan Oiling ............................................. 14
7. Service.......................................................................... 15
7.1 Warranty................................................................. 15
7.2 Technical Description......................................... 15
7.3 Troubleshooting................................................... 15
7.4 Refrigerant Charging.......................................... 17
7.5 Impeller Fan Replacement................................. 17
7.6 Compressor/Capacitor Replacement .............. 17
7.6A Checking Compressor Motor Circuits ... 17
7.6B External Control Options ......................... 18
7.6C Replacing Compressor-Nonburn Out..... 19
7.7 Remote Controls.................................................. 19
7.7A Humidity Control ....................................... 19
7.8 Defrost Thermostat ............................................. 19
7.9 Condensate Pump Kit.......................................... 19
7.10 Power Cord Replacement................................. 20
Error Codes...................................................................... 22
Wiring Diagram.................................................................. 11
Service Parts List ........................................................... 24
Optional Parts List ......................................................... 24
Warranty......... .................................................................. 23
4201 Lien Rd. Madison, WI 53704
[phone]
Thermastor.com | QuestClimate.com
© 2016 Therma-Stor LLC

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QUEST 100 INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
QUESTCLIMATE.COM(877) 420-1330
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 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.
• Not intended for use at altitudes over 6500 ft (2000M).

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QUEST 100 INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
QUESTCLIMATE.COM(877) 420-1330
1. INTENDED APPLICATION FOR QUEST 100
The Quest 100 Dehumidifier is designed to operate in temperatures between 56° and 95°F.
In order to efficiently 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 100
Dehumidifier, water intrusion and air infiltration problems should be addressed or noted in calculations.
2. REGISTRATIONS
The Quest 100 Dehumidifier units conform to unified standard UL 60100-2-40, CSA C22, 2#60100-2-40.
US Patents: D570,988 / 8,069,681 / 9,052,132.
3. SPECIFICATIONS @ 80°F/60% RH
UNIT QUEST 100
4041870
CFM: 280 @ 0.0” WG
POWER: 540 Watts
SUPPLY VOLTAGE: 120 Volt
1 Phase - 60 Hz
CURRENT DRAW: 5.0A
RATED CURRENT DRAW:
(104 F | 36%) 6.8A
MINIMUM CIRCUIT AMPACITY (MCA):8A
MAXIMUM OVERCURRENT PROTECTION
(MOP):15A
RECOMMENDED BREAKER SIZE: 15A
ENERGY FACTOR (L/KWH):3.55 L/kWh
OPERATING TEMP: 56 F Min – 95 F Max
WATER REMOVAL (PINTS/DAY):
EFFICIENCY (PINTS/KWH):
100
7. 5
AIR FILTER (MERV-13): Size: 12” x 14” x 1”
POWER CORD: 9’, 115 VAC, Ground
DRAIN CONNECTION: 3/4” Threaded NPT
REFRIGERANT TYPE:
REFRIGERANT AMOUNT:
R410A
1 lb 7 oz
DIMENSIONS:
WIDTH:
HEIGHT:
LENGTH:
WEIGHT:
Unit Shipping
24” 26.5”
14.5” 18.5”
16” 18.75”
60 lb 65 lb
4.5. Service ....................................................................... 11
*MCA = Minimum Circuit
Ampacity
This number provides a qualified
electrician with the information
needed to determine the minimum
wire size used in the circuit that
feeds a single dehumidifier.
* MOP = Maximum Overcurrent
Protection
This number provides a qualified
electrician with the value of the
maximum size circuit breaker that
may be used to protect the circuit
that feeds a dehumidifier.
Specifications are subject
to change without notice.

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QUEST 100 INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
QUESTCLIMATE.COM(877) 420-1330
4. INSTALLATION
4.1 LOCATION
The Quest 100 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:
• Locate the dehumidifier near a suitable drain (8’ drain hose included). Allow for proper drainage and
routing of needed drain pipes.
• Locate the dehumidifier in an area where the cord’s length (9’) easily reaches a 115 VAC electrical
outlet with a minimum of a 15 Amp circuit capacity.
• The unit is designed to operate while level. If the unit is placed on an unlevel surface, refer to section
below (Installing Leveling Feet). Failure to level the unit may result in leakage or improper drainage.
• Allow sufficient clearance to handle the unit’s overall dimensions as well as any optional return and
supply ductwork to the unit.
• Allow sufficient clearance for filter removal and to prevent airflow obstruction.
• Electrical service access will require the removal of the top “L” shaped panel. Allow sufficient
clearance around the unit.
• The Quest 100 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
• The unit should be suspended with a hang kit from the floor joists if there is any possibility of
flooding. A flooded unit is not covered by warranty. Feet will be installed as a securing measure after
the hang kit is put on the dehumidifier. DO NOT hang the Quest 100 dehumidifier from its’ cabinet.
4.2 DUCTING
Return and supply duct collars are optional accessories for the Quest 100 and not included with the unit.
CAUTION! Do not connect with a static pressure greater than or equal to +1.0 WG. Contact
technical support at [phone] for additional details.
DUCTING CONSIDERATIONS:
•All flexible ducting connected to the Quest 100 should be UL listed.
• A short piece of flexible ducting on all Quest 100 duct connections is recommended to
reduce noise and vibration transmitted to rigid ductwork in the structure.
• Use a minimum 10” diameter round or equivalent rectangular duct for total duct
lengths of up to 25’.
• Grills or diffusers on the duct ends must not excessively restrict airflow.
• A length of 8” or more of insulated flex duct or any other vibration isolating material on the
outlet of the Quest 100 will reduce air noise from the blower.
• When ducting two or three areas, use 8” or larger diameter branch ducting. When ducting to four or
more areas, use 6” or larger diameter branch ducting. Provisions must be made to provide airflow
supply locations to the central return location. Proper air distribution is important to ensure even
humidity control and heat distribution throughout the structure.

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QUEST 100 INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
QUESTCLIMATE.COM(877) 420-1330
DUCTING TO HVAC OPTIONS
A. HVAC SUPPLY TO SUPPLY
CAUTION!
To avoid the dehumidifier cycling in and out of DEFROST, it is recommended that the leaving air temperature
of the A/C coil is not below 55°F. Also, this install is not recommended for climates where the heating
system will run during the spring and fall times of year, as this could diminish the water removal capability
of the dehumidifier. If the Check Damper is not used, it is important to have the HVAC system fan ON when
the dehumidifier is ON to prevent backflow of air.
WARNING! Due to pressure resistance it is not recommended to use the optional outdoor air
intake when installing the dehumidifier supply to supply.
B. DEDICATED RETURN TO SUPPLY
Quest 100
Indoor Air
Return
Air Handler Supply
Quest 100 Supply
Optional Duct
Tee & Gravity
Damper
HVAC
Supply
Quest 100
Return
Dry Air to
Conditioned Space
Quest 100
Supply
Air Handler
Optional Check Damper
(No HVAC fan needed)

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QUEST 100 INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
QUESTCLIMATE.COM(877) 420-1330
CAUTION! PLEASE NOTE: Return to Return installs are to be considered last resort options and are not
recommended. The dehumidifier will heat the AC cooling coils which diminishes the amount of water the AC system
will remove when operating. If this installation is chosen, the dehumidifier must activate the HVAC blower and AC
calls need to lock out the dehumidifier from running. Please check your local codes prior to installing.
C. DEDICATED QUEST RETURN TO HVAC RETURN
Create a separate return for the
Quest 100 Dehumidifier in a central
area of the building.
Installing the supply air from the
Quest 100 Dehumidifier to the return
of the HVAC system requires the HVAC
fan to run when the Quest Dehumidifier
is operating.
D. HVAC RETURN TO HVAC RETURN
NOTE: If Check Damper is not in place,
the HVAC fan must ON when
the dehumidifier is in operation.
Quest 100 Indoor
Air Return
Quest 100
Return
Optional Outdoor
Air Intake
Optional Check Damper
(No HVAC fan needed)
HVAC
Return
HVAC
Return
Quest 100
Supply
Quest 100
Supply
Backdraft
Damper
HVAC
Supply
HVAC
Supply
Air Handler
Air Handler

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QUEST 100 INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
QUESTCLIMATE.COM(877) 420-1330
E. HVAC RETURN TO HVAC SUPPLY
F. NO EXISTING DUCTWORK INSTALLATION
When installing the Quest 100 Dehumidifier in a structure that does not have a forced-air HVAC system,
a single return for the dehumidifier should be installed in a central location. The supply air should be ducted back
into the space you want to dry. Proper air distribution is important for optimal performance of the dehumidifier.
Install a 6” insulated duct from outside, teeing into the 8” return duct of the Quest 100 Dehumidifier
to provide outdoor air ventilation (optional).
An 8” diameter duct is recommended for branches to larger areas.
Check Damper should be in place
between the Return and Supply
connections of the dehumidifier.
If the Check Damper is not in place,
the HVAC fan must be ON when
the dehumidifier is in operation.
Anything greater than 0.4” of static
requires HI fan setting. Anything greater
than 0.7” of static requires HI override
(99). Anything greater than 0.9” is not
recommended.
Quest 100
Supply
Quest 100
Indoor Air
Return
Quest 100
Return
Quest 100
Supply
Quest 100
Return

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QUEST 100 INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
QUESTCLIMATE.COM(877) 420-1330
A. If the provided drain hose does not reach your
drain, rigid PVC tubing is readily available
from your local hardware store. Be sure the
extension is at a downward slope to the drain.
B. An optional condensate pump kit may
be installed if lift is required to remove
condensate. To order, contact your local dealer
or visit our website at www.questclimate.com.
OUTPUT TO DRAIN OR BUCKET.
4.3 CONDENSATE WATER REMOVAL
NOTE: This unit is positively pressured and using a p-trap is not recommended.
*
Primary Drain Port
End View
Secondary Drain Port

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QUEST 100 INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
QUESTCLIMATE.COM(877) 420-1330
4.4 HANGING DIAGRAM, QUEST 100
4036668
Hang Bracket
(PN 4036668)
Bottom view of dehumidifier
and two brackets (not included)
NOTE: LEVELING FEET HOLD BRACKETS IN PLACE