Quest Engineering 215 Dual Manual

Installation, Operation and Maintenance Instructions
This manual is provided to acquaint you with the dehumidi-
fier 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 engi-
neering principles and has passed a thorough inspection for
quality of workmanship and function.
Quest Dry
Installation, Operation and Maintenance Instructions
4201 Lien Rd
Madison, WI 53704 Toll-Free 1-877-420-1330
www.QuestHydro.com [e-mail]
– Read and Save These Instructions –
Specifications subject to change without notice. 1
Quest 215 Dual
Water Removal Rates (Pints/Day)
215 pints 80˚F, 60% (AHAM) (215 Dual)
PATENTS:
D570,988
8,069,681
9,052,132
The Quest 215 Dual is the largest capacity of the group. This
unit removes up to 215 pints of water per day using only 6.9
amps/230V. Ideally suited for commercial gardens and green
houses.
Features:
• Industry-leading efficiency, most efficient on the market
today
• Patented, optimized air-to-air heat exchanger
• High-efficiency, long-life impeller fan
• Quiet operation
• Superior air filtration (MERV-11 standard)
• Auto-restart after power outages
• Environmentally friendly R410A refrigerant
• Low voltage control
TS-929
12/15

1-877-420-1330
Quest 215 Dual Installation, Operation and Maintenance Instructions
2www.QuestHydro.com
[e-mail]
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 Install Diagram.............................................................. 6
4.5 Ducting ........................................................................ 7
4.5A Supply Duct Kit ................................................ 7
4.5B Return Duct Kit ................................................ 7
5. Controls ........................................................................ 7
6. Optional Dehumidifier & Ventilation System
Controller ........................................................................ 9
7. Maintenance ...................................................................... 10
7.1 Standard Air Filter ....................................................... 10
7.2 High Eciency Air Filter ........................................... 10
7.3 Impeller Fan Oiling ..................................................... 10
7.4 Optional Fresh Air Return ........................................ 10
8. Service ...................................................................... 10
8.1 Warranty ...................................................................... 10
8.2 Technical description ....................................................11
8.3 Troubleshooting.............................................................11
8.4 Refrigerant Charging .................................................13
8.5 Impeller Fan Replacement .........................................13
8.6 Compressor/Capacitor Replacement........................13
8.6A Checking Compressor Motor Circuits .........13
8.6B Replacing Burned Out Compressor ............. 14
8.6C Replacing Compressor-Nonburn Out...........15
8.7 Remote Controls .........................................................15
8.7A Humidity Control.............................................15
8.7B Programable Ventilation Timer.......................15
8.8 Defrost Thermostat.....................................................15
8.9 Electric Ventilation Damper.......................................16
8.10 Condensate Pump Kit ...............................................16
Electrical Schematic ...............................................................17
Service Parts List .....................................................................18
Optional Parts List ..................................................................19
Warranty ..................................................................... 20

1-877-420-1330
Quest 215 Dual Installation, Operation and Maintenance Instructions
3www.QuestHydro.com
[e-mail]
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 215 Dual 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 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 or spa; be certain there is NO chance the unit
could fall into the water, be splashed and that it is plugged into a GFI
GROUND FAULT INTERRUPT OUTLET.
• 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.
• 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.

1-877-420-1330
Quest 215 Dual Installation, Operation and Maintenance Instructions
4www.QuestHydro.com
[e-mail]
1. Intended Application for Quest 215 Dual
The Quest 215 Dual 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 215 Dual, water intrusion and air
infiltration problems should be addressed or noted in calculations.
2. Registrations
The Quest 215 Dual units conform to unified standard UL 60335-2-40.
3. Specifications
Unit: 4035400 215 Dual
Blower:
(Tested with duct collars on)
526 CFM @ 0.0" WG
495 CFM @ 0.2" WG
458 CFM @ 0.4" WG
Power: 1500 Watts @ 80°F and 60% RH
Supply voltage: 220-240 VAC - 1 Phase - 60 Hz.
Current Draw: 6.9 Amps
Energy Factor: 2.9
Operating Temp: 56°F Min - 95°F Max
Minimum Performance @ 80°F and 60% RH:
Water Removal:
Eciency:
215 Pints/Day
6.1 Pints/kWh
Air Filter: MERV-11 Size: 16" x 20" x 2"
Power Cord: 10' 14/3 SJTW w/6-15P Plug
Drain Connection: 3/4 Threaded NPT
Dimensions:
Width:
Height:
Length:
Weight:
UnitShipping
37.875" 42"
21.75" 28.25"
20.25" 24"
150 lbs 170 lbs

1-877-420-1330
Quest 215 Dual Installation, Operation and Maintenance Instructions
5www.QuestHydro.com
[e-mail]
4. Installation
4.1 Location
The Quest 215 Dual 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 215 Dual as a bench or table.
• DO NOT place the Quest 215 Dual 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.
Place the Quest 215 Dual on supports that raise the base of the unit 2.5” above the top of the flanges on the drain
pan beneath it. Raising the Quest 215 Dual will help the unit drain with gravity flow. Do not place the Quest 215 Dual
directly on structural building members without vibration absorbers or unwanted noise may result.
The Quest 215 Dual 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. Remember to place a drain pan under the unit if it is
suspended above a finished area or above an area where water leakage could cause damage.
The Quest 215 Dual should be located near the existing air handling system to minimize the required ductwork for
connecting the Quest 215 Dual to the existing air handling system. The controls for the Quest 215 Dual 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 Quest 215 Dual with low voltage thermostat cable.
4.2 Electrical Requirements
WARNING! DO NOT ALLOW THE YELLOW LEAD FROM THE Quest 215 Dual TO CONTACT THE RED
LEAD OR WHITE LEAD FROM THE Quest 215 Dual OR DAMAGE TO THE TRANSFORMER WILL RESULT.
The Quest 215 Dual plugs into a NEMA 6-15 Receptacle. The amp draws for each unit under normal operating
conditions are listed on page 4. A ground fault interrupter protected circuit is required.
Install the remote control panel in a central area of the structure where it will sense the relative humidity of the structure
accurately. Do not install the control panel where it may not accurately sense the relative humidity such as near HVAC
supply registers, near exterior doors, or near a pool or spa. The installer must supply the wiring between the Quest 215
Dual and the control panel. Be sure to safely route the control wiring to prevent damage during installation. Be careful
not to cross the wires when connecting the Quest 215 Dual and the remote control panel or damage to the transformer
may result.

1-877-420-1330
Quest 215 Dual Installation, Operation and Maintenance Instructions
6www.QuestHydro.com
[e-mail]
The remote controls of the Quest 215 Dual 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 Quest 215 Dual and the remote control panels are
numbered and color-coded to prevent confusion. Some of the control wires leaving the Quest 215 Dual 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 inside the access panel of the Quest 215 Dual before making the
control connections.
4.3 Condensate Water Removal
Condensate drains by gravity via the drain port. Use 3/4” male NPT PVC pipe. Route drain pipe to drain. Install a trap if
possible. Take care when installing drain pipe to drain port. Use an adjustable wrench to secure the drain port. An optional
condensate pump kit may be installed if a lift is required to dispose of the condensate. The condensate pump kit can be
ordered directly from the factory. See the optional parts list for information on the kit.
When installing the drain hose make sure the feet are extended such that the dehumidifier is 2 1/2” o the ground.
Then coil the drain hose under itself or position a spacer to lift the hose 1” o the ground after the hose has touched the
ground. This procedure will create a trap that ensures your unit drains correctly. See the diagram below for further visual
clarification.
4.4 Installation Diagram
B
B
A
B
A
A
A
A
A
B
Optional Humidistat
(4020175)
Bottom view of
unit and bracket
Bracket (4036668)
note: plumb condensate
water to drain or
reclamation reservoir
P-trap
(see section 4.5 for more info)
BB

1-877-420-1330
Quest 215 Dual Installation, Operation and Maintenance Instructions
7www.QuestHydro.com
[e-mail]
(P/N 4027370; with remote: P/N 4038531)
Control Part No. 4027370
Quest
Dehumidifier
RED
4201 Lien Rd. Madison, WI 53704 •TOLL-FREE 1-800-533-7533 •www.thermastor.com •[e-mail]
TS-673, 06/11
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
Control Part No. 4027370
Quest
Dehumidifier
RED
4201 Lien Rd. Madison, WI 53704 •TOLL-FREE 1-800-533-7533 •www.thermastor.com •[e-mail]
TS-673, 06/11
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
4.5 Ducting
4.5A Supply Duct Kit (P/N 4028607)
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 1-800-533-7533 to order.
4.5B Return Duct Kit (P/N 4028610)
A factory designed return duct kit can be purchased to accept 12” ducting. Contact your dealer or call 1-800-533-7533
to order.
5. Control Options
The Quest 215 Dual can be equipped with various accessories to enhance its operation. A remote control must be used
with the Quest 215 Dual. ThermaStor oers 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 oered 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 Quest 215 Dual 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 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 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.

1-877-420-1330
Quest 215 Dual Installation, Operation and Maintenance Instructions
8www.QuestHydro.com
[e-mail]
Control Part No. 4027370
Quest
Dehumidifier
RED
4201 Lien Rd. Madison, WI 53704 •TOLL-FREE 1-800-533-7533 •www.thermastor.com •[e-mail]
TS-673, 06/11
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

1-877-420-1330
Quest 215 Dual Installation, Operation and Maintenance Instructions
9www.QuestHydro.com
[e-mail]
Control Part No. 4027370
Quest
Dehumidifier
RED
4201 Lien Rd. Madison, WI 53704 •TOLL-FREE 1-800-533-7533 •www.thermastor.com •[e-mail]
TS-673, 06/11
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
DEH3000 P/N: 4027370
DEH3000R (remote) P/N: 4028531
Model: DEH 3000
DEH 3000R (remote)
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
• Digital control of Relative Humidity (Digital Set-Point)
• Fan/Filter Operation
• Programmable Ventilation Timer
• Large, easy-to-read backlit LCD display
• Easy interaction with air handler fan (Interlock/Lockout)
• High Temperature Cut-Out
• Dryout Cycle Timer
• Auto Reboot
• Remote Sensor (DEH 3000R Only)
To order call Therma-Stor at
1-800-533-7533
DEH3000/DEH 3000R
DEH3000/DEH 3000
R
Part No. 4027370 Part No. 4028531
6. Optional Dehumidifier & Ventilation System Controller
When used with Quest 215 Dual Whole Structure Ventilating Dehumidifiers, the DEH 3000/3000R allows end-
users the ability to monitor and control relative humidity levels in their structure.

1-877-420-1330
Quest 215 Dual Installation, Operation and Maintenance Instructions
10 www.QuestHydro.com
[e-mail]
7. Maintenance
7.1 Standard Air Filter
The Quest 215 Dual is equipped with a pleated cloth air 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 215 Dual. The filter should be readily
visible and can be removed by pulling them straight out of the Quest 215 Dual.
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 eective filter than the standard filter. The heat exchange coils inside the unit could become clogged and
require disassembly to clean. Filter non-compliance invalidates the product warranty.
7.2 High Eciency Air Filter - MERV 14
An optional high eciency pleated microglass paper filter is available for the Quest 215 Dual . This filter is rated as 90%-
95% ecient by the ASHRAE Dust Spot test method 52-76. The high eciency 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 eciency 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 eciency filter requires replacement. Be careful not to damage the fabric media when handling the high eciency
pleated paper filter. Do not attempt to clean the high eciency pleated paper filter. It should be replaced when it
becomes restrictive (See Figure 7).
7.3 Impeller Fan Oiling
The impeller fan motor is factory lubricated for many years of normal operation, and no further oiling is required.
7.4 Optional Fresh Air Return
Check and clean the screen on the outdoor fresh air return seasonally. The screen may become plugged during the
seasons when there are many particles in the outdoor air.
8. Service
8.1 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.