Quest Engineering 155 Manual

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.
Quest Dry
Installation, Operation and Maintenance Instructions
4201 Lien Rd Phone [phone]
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. 1TS-1052
05/18 Rev. B
50HzQuest 155
50Hz Quest 155:
• Industry-leading efficiency
• Patented, optimized air-to-air heat exchanger
• High-efficiency, long-life impeller fan
• MERV-13 filtration
• Auto-restart after power outages
• Low voltage control
Water Removal Rates Per Day @ 26.7°C (80°F) 60% (AHAM)
Dehumidifier Liters Pints/Gallons
Quest 155 71 150/18.7

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Table of Contents
Safety Precautions....................................................................3
1. Intended Application(s).........................................................4
2. Registration ........................................................................4
3. Specifications ....................................................................4
4 . Installation ........................................................................5
4.1 Location ........................................................................5
4.2 Electrical Requirements............................................... 5
4.3 Condensate Water Removal........................................6
4.4 Hanging Diagram .........................................................6
4.5 Ducting ........................................................................ 7
4.5A. Supply Duct Kit (P/N 4028607).................. 7
4.5B Return Duct Kit (P/N 4028610)................... 7
5. Control Options.................................................................... 7
5.1 On Board Dehumidistat................................................ 7
5.2 External Control...........................................................8
5.2A DEH 3000R ....................................................8
5.2B Honeywell Remote Humidistat.......................9
6. Maintenance ........................................................................9
7. Service ........................................................................9
7.1 Warranty ........................................................................9
7.2 Technical Description ...................................................9
7.3 Troubleshooting........................................................... 10
7.4 Refrigerant Charging....................................................11
7.5 Impeller Fan Replacement...........................................11
7.6 Compressor/Capacitor Replacement ........................12
7.6A Checking Compressor Motor Circuits...........12
7.6B Replacing a Burned out Compressor..............12
7.6C Replacing a Compressor, Nonburn Out........13
7.7 Remote Controls..........................................................13
7.7A Humidity Control............................................ 14
7.8 Defrost Thermostat.................................................... 14
7.9 Condensate Pump Kit ................................................ 14
8. Wiring Diagram....................................................................15
9. Service Parts List .................................................................16
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 benefit from your Quest 155 indoor air quality system.
READ AND SAVE THESE INSTRUCTIONS
• 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 a similarly qualified
person in order to avoid a hazard.
• Do not unplug the unit by pulling on the cord. Grasp the plug firmly and pull it out
of the wall socket or power receptacle.
• When plugging in the unit, use a Ground Fault Interrupter outlet.
• This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience or knowledge,
unless they have been given supervision or instruction concerning the 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.
• Never operate electrical equipment near or in standing water.
• Do not stick your fingers or other objects through the safety grill.
• The unit must be used in the upright position.
• When changing filters, do not stick fingers or other objects in the unit.
• Do not restrict airflow in to or out of the unit. This may cause the unit to overheat.
• The unit should never be serviced or cleaned while it is plugged in.
• Do not sit or stand on the unit, or use as a shelf or table.
• Before leaving the unit unattended, ensure children do not have access to the
equipment. Do not allow children to play with or near the unit or in its air flow.
• The unit is designed to be installed indoors only.
• No user serviceable components. Contact installer or call 1-877-420-1330 for all
repair or warranty needs.

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1. Intended Application for Quest 155
The Quest 155 is designed to operate in temperatures between 5°C and 35°C.
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 155, water intrusion and air infiltration
problems should be addressed.
2. Registrations
The Quest 155 conforms to CE standards.
3. Specifications @ 26.7°C/60% RH
4037400-XX Quest 155
Blower: 415 CFM @ 0.0" WG
Power: (Watts) 800
Supply voltage: 230 VAC - 1 Phase - 50 Hz.
Current Draw: (Amps) 3.5
Energy Factor: (L/kWh) 3.74
Operating Temp: 5°C Min - 35°C Max
Water Removal: (L/Day) 71
Air Filter: MERV-13 Size: 41cm x 51cm x 5cm
Drain Connection: 3/4” Threaded NPT
Refrigeration Type:
Refrigerant Amount:
R410A
2 lbs, 1 oz
Dimensions:
Width:
Height:
Length:
Weight:
Unit
96cm
56cm
51cm
61 kg
Power Cord: 20’ Fem IEC 60320-C13
4037400-01 UK Cord
BS 1363 (type G)
4037400-02 AUS Cord
AS 3112 (type I)
4037400-03 EU Cord
CEE 7/7 (type E and F)

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4. Installation
Caution! Remove compressor shipping tie from the unit. Failure to remove shipping tie will cause
excess vibration to be transmitted to the frame.
4.1 Location
The Quest 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 Dehumidifier as a bench or table.
• DO NOT place the Quest 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.
Place the Quest Dehumidifier on supports that raise the base of the unit 7cm above the top of the flanges on the
drain pan beneath it. Raising the Quest Dehumidifier will help the unit drain with gravity flow. Do not place the Quest
Dehumidifier directly on structural building members without vibration absorbers or unwanted noise may result.
The Quest 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. 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. See section 4.4
4.2 Electrical Requirements
The Quest Dehumidifier plugs into IEC 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.
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
Dehumidifier 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 Dehumidifier and the remote control panel.
The remote controls of the Quest Dehumidifier are powered by a low voltage circuit (24 VAC) and must NEVER
contact or be connected to a high voltage circuit. The control terminals and remote control are labeled and numbered
to prevent confusion. Be sure to consult the electrical schematic in this manual or inside the access panel of the Quest
Dehumidifier before making the control connections.

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CAUTION! For proper drainage, the unit must be mounted so the drain outlet is at least 7cm
above the floor drain, and must be fully supported under the base.
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 7cm o the ground. Then
coil the drain hose under itself or position a spacer to lift the hose 3cm” 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 Hanging Diagram
Bottom view of
unit and bracket
Bracket (4036668)
Opt.1 Opt.2

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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. Contact your
dealer, call 1-877-420-1330, or go to www.questhydro.com/product-category/accessories 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, call 1-877-420-1330, or
go to www.questhydro.com/product-category/accessories to order.
5. Control Options
The Quest Dehumidifier can be controlled by its on board dehumidistat or with an external control using its low voltage
terminal block.
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
“Dry” 20% to 30% Relative Humidity
“Normal” 50% 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.
4037356

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5.2 External Control
The Quest Dehumidifier is controlled using five terminals.
COM = 24volt AC power transformer neutral side (common with white)
FAN = Fan control
24V = transformer high side
DEHU = Dehumidification (fan and compressor) control
DMPR = 24volt AC power transformer neutral side (common with red)
* On board dehumidistat must be turned all the way to “Humid”
Between the COM/DMPR lead and the 24V 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 24V and DEHU terminals, or turn the dehumidistat
clockwise towards drier.
• To turn the fan on make contact between 24V and FAN terminals.
• To power a 24V HVAC accessory, connect the accessory to the COM terminal and the 24V terminal.
NOTE: 18 ga wire needed between the Quest dehumidifier and the external control
Quest oers two external control options
5.2A DEH 3000R
NOTE: 22 ga wire needed for sensor
Contact your dealer, call 1-877-420-1330, or go to www.questhydro.com/product-category/accessories to order.
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BEFORE TURNING ON UNIT:
1. CUT AND REMOVE ZIP TIE
2. PLUG HOLES USING
INCLUDED PLUGS
COM
FAN
24V
DEHU
*
DMPR
COM
FAN
24V
DEHU
*
DMPR
24VAC
COMP FAN
HONEYWELL REMOTE HUMIDISTAT
WIRING DIAGRAM
QUEST DEH 3000R CONTROL
WIRING DIAGRAM
4028531 Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6
COM
FAN
24V
DEHU
*
DMPR
White Blue Yellow Green Red
COM
FAN
24V
DEHU
*
DMPR
COM
FAN
24V
DEHU
*
DMPR
COM
FAN
24V
DEHU
*
DMPR
COM
FAN
24V
DEHU
*
DMPR
COM
FAN
24V
DEHU
*
DMPR
COM
FAN
24V
DEHU
*
DMPR
* NOTE: Best quality if printed in color

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BEFORE TURNING ON UNIT:
1. CUT AND REMOVE ZIP TIE
2. PLUG HOLES USING
INCLUDED PLUGS
COM
FAN
24V
DEHU
*
DMPR
COM
FAN
24V
DEHU
*
DMPR
24VAC
COMP FAN
HONEYWELL REMOTE HUMIDISTAT
WIRING DIAGRAM
QUEST DEH 3000R CONTROL
WIRING DIAGRAM
5.2B Honeywell Remote Humidistat
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.
The Quest Dehumidifier ships with a standard MERV 13 ecient pleated fabric filter. 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 Dehumidifier. The filter should be readily
visible and can be removed by pulling it straight out of the Quest Dehumidifier.
At minimum we recommend changing the filter every 3 to 6 months.
7. Service
WARNING! Servicing the Quest 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 Dehumidifier 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.

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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 expansion device 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 flooded condition, which means that all
the evaporator tubes contain liquid refrigerant during normal operation. A flooded 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 to repeat the process.
7.3 Troubleshooting
Neither fan nor compressor running. Dehumidification is being called for. No fan call.
1. Unit unplugged or no power to outlet.
2. Humidity control set too high.
3. Loose connection in internal or control wiring.
4. Defective Compressor relay.
5. Defective control transformer.
Compressor is not running. Dehumidification is being called for. No fan call.
1. Defective compressor run capacitor.
2. Loose connection in compressor circuit.
3. Defective compressor overload.
4. Defective compressor.
5. Defrost thermostat open.
Compressor cycles on and o. Dehumidification is being called for. No fan call.
1. Low ambient temperature and/or humidity causing unit to cycle through defrost mode.
2. Defective compressor overload.
3. Defective compressor.
4. Defrost thermostat defective.
5. Dirty air filter(s) or air flow restricted.
Fan is not running. Dehumidification or fan is being called for.
1. Loose connection in fan circuit.
2. Obstruction prevents fan impeller rotation.
3. Defective fan.
4. Defective fan relay.
Low dehumidification capacity (evaporator is frosted continuously). Dehumidification is being called for
1. Defrost thermostat loose or defective.
2. Low refrigerant charge

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3. Dirty air filter(s) or air flow restricted.
4. Excessively restrictive ducting connected to unit.
No ventilation. Ventilation is being called for.
1. Loose connection in ventilation control circuit
2. Loose connection in damper power circuit.
3. Defective fresh air damper.
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 filter 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 field control wiring connections from main unit.
2. Connect the 24V and FAN pigtails from the main unit together; only the impeller fan should run. Disconnect the
wires.
3. Connect the 24V and DEHU pigtails from the main unit together; the compressor and impeller fan should run.
4. If these tests work, the main unit is working properly. You should check the control panel and field control wiring for
problems next.
5. Remove the control panel from the mounting box and detach it from the field installed control wiring. Connect the
DEHU, 24V, and FAN terminals from the control panel directly to the corresponding colored pigtails on the main
unit. Leave the, DMPR and COM terminals disconnected!
6. Turn on the fan switch; the impeller fan should run. Turn o the fan switch.
7. Turn on the humidity control; the compressor and impeller fan should run.
8. If these tests work, the problem is most likely in the field control wiring.
7.4 Refrigerant Charging
If the refrigerant charge is lost due to service or a leak, a new charge must be accurately weighed in. If any of the old
charge is left in the system, it must be recovered before weighing in the new charge. Refer to the unit nameplate for the
correct charge weight and refrigerant type.
7.5 Impeller Fan Replacement
The motorized impeller fan is a unitary assembly consisting of the motor and impeller fan. If defective, the complete
assembly must be replaced.

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1. Unplug the power cord.
2. Remove the cabinet access panel.
3. Remove the screw attaching the impeller fan support bracket to the base.
4. Disconnect the impeller fan leads inside the electric box.
5. Remove fan/bracket assembly by removing 3 screws from the bracket and inlet ring assembly.
6. Remove the defective impeller fan from the bracket and replace with it with the new impeller fan.
7. Reassemble the new impeller fan by reversing the above procedure. Note: There are two pins on the backside of the cabinet
that must align with the two holes in the impeller fan support bracket.
7.6 Compressor/Capacitor Replacement
This compressor is equipped with a two terminal external overload and a run capacitor, but no start capacitor or relay
7.6A Checking Compressor Motor Circuits
Perform the following tests if the impeller fan runs but the compressor does not with the fan switch and ventilation timer OFF and
the humidity control ON.
1. Unplug the unit; remove the cabinet side and the electrical connection cover on the compressor top.
2. Plug in the unit and turn the humidity control to ON. Check for volts from compressor terminal R to overload terminal 3 using
an AC voltmeter. If correct voltage is present, go to step 3. If no voltage, there may be a loose connection in the compressor
circuit. Test each component for continuity. See the appropriate section if a defect is suspected.
3. Unplug the unit, and then disconnect the red and yellow wires from compressor terminals R & S. Using an ohmmeter check
continuity between the points listed below.
4. Compressor terminals C and S: No continuity indicates an open start winding. The compressor must be replaced. Normal start
winding resistance is 3 to 7 ohms.
5. Compressor terminals C and R: No continuity indicates an open run winding. The compressor must be replaced. Normal run
winding resistance is .5 to 2 ohms.
6. Compressor terminal C and overload terminal 1: No continuity indicates a defective overload lead.
7. Overload terminals 1 and 3: If there is no continuity, the overload may be tripped. Wait 10 minutes and try again. If there is still
no continuity, it is defective and must be replaced.
8. Compressor terminal C and compressor case: Continuity indicates a grounded motor. The compressor must be replaced.
9. Disconnect the wires from the run capacitor. Set the ohmmeter to the Rx1 scale. The capacitor is shorted and must be
replaced if continuity exists across its terminals. If there is no needle movement with the meter set on the Rx100000 scale,
the capacitor is open and must be replaced.
10. Reconnect the wires to the compressor and capacitor. Plug in and turn on the unit. If the compressor fails to start, replace the
run capacitor.
11. If the unit still does not start, adding a hard-start kit (relay & capacitor) will provide greater starting torque. If this doesn't work,
the compressor has an internal mechanical defect and must be replaced.
7.6B Replacing a Burned Out Compressor
The refrigerant and oil mixture in a compressor is chemically very stable under normal operating conditions. However, when
an electrical short occurs in the compressor motor, the resulting high temperature arc causes a portion of the refrigerant oil

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mixture to break down into carbonaceous sludge, a very corrosive acid, and water. These contaminants must be carefully removed
otherwise even small residues will attack replacement compressor motors and cause failures.
The following procedure is eective only if the system is monitored after replacing the compressor to insure that the clean up was
complete.
1. This procedure assumes that the previously listed compressor motor circuit tests revealed a shorted or open winding.
2. Remove and properly dispose of the system charge. DO NOT vent the refrigerant or allow it to contact your eyes or skin.
3. Remove the burned out compressor. Use rubber gloves if there is any possibility of contacting the oil or sludge.
4. To facilitate subsequent steps, determine the type of burn out that occurred. If the discharge line shows no evidence of sludge
and the suction line is also clean or perhaps has some light carbon deposits, the burn out occurred while the compressor
was not rotating. Contaminants are therefore largely confined to the compressor housing. A single installation of liquid and
suction line filter/driers will probably clean up the system.
If sludge is evident in the discharge line, it will likely be found in the suction line. This indicates the compressor burned out will
running. Sludge and acid have been pumped throughout the system. Several changes of the liquid and suction filter/driers will
probably be necessary to cleanse the system.
5. Correct the system fault that caused the burn out. Consult the factory for advice.
6. Install the replacement compressor with a new capacitor and an oversized liquid line filter.
In a running burn out, install an oversized suction line filter/drier between the accumulator and compressor. Thoroughly flush
the accumulator with refrigerant to remove all trapped sludge and to prevent the oil hole from becoming plugged. A standing
burn out does not require a suction line filter/drier.
7. Evacuate the system with a good vacuum pump and accurate vacuum gauge. Leave the pump on the system for at least an
hour.
8. Operate the system for a short period of time, monitoring the suction pressure to determine that the suction filter is not
becoming plugged. Replace the suction filter/drier if pressure drop occurs. If a severe running burn out has occurred, several
filter/driers may have to be replaced to remove all of the acid and moisture.
NOTE: NEVER use the compressor to evacuate the system or any part of it.
7.6C Replacing a Compressor, Nonburn Out
Remove the refrigerant from the system. Replace the compressor and liquid line filter/drier. Charge the system to 50 PSIG and
check for leaks. Remove the charge and weigh in the refrigerant quantity listed on the nameplate. Operate the system to verify
performance.
7.7 Remote Controls
The Quest Dehumidifier is controlled by devices mounted on a panel that is remote from the unit. You may or may not have
the devices listed below depending on the model of the remote control panel you purchased. If the Quest Dehumidifier fails to
operate as desired, always check the settings of the controls to insure that they are correct. Check that the controls are receiving
24Vac from the Quest Dehumidifier. Check the connections between the Quest Dehumidifier, the control panel, and the field
control wiring.

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7.7A Humidity Control
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. If the Quest Dehumidifier does not run, try turning the
humidity control clockwise until it reaches the stop and the knob pointer points at “Max Dry” (see back of control panel cover). If
it still does not run, remove the stop screw from the panel and turn the knob farther. If it then runs, the humidity control is out of
calibration or the RH is below 40%.
The Quest Dehumidifier is equipped with an automatic defrost mechanism. If the Quest Dehumidifier operates in conditions that
develop frost on the evaporator, it will sense the frost build-up and automatically defrost the evaporator. The Quest Dehumidifier
may not appear to be operating correctly during the defrost sequence, but once the defrost sequence is completed, the Quest
Dehumidifier will resume dehumidifying.
7.8 Defrost Thermostat
The defrost thermostat is attached to the refrigerant suction tube between the accumulator and the compressor. It will
automatically shut the compressor o if the low side refrigerant temperature drops due to excessive frost formation on the
evaporator coil. The impeller fan will continue to run, causing air to flow through the evaporator coil and melt the ice. When the ice
has melted, the evaporator temperature will rise and the thermostat will restart the compressor.
7.9 Condensate Pump Kit
An optional condensate pump kit is available from the factory for use with the Quest Dehumidifier. Condensate is automatically
pumped to a remote location when the water level in the pump's reservoir rises to close the float switch.
The pump also contains a safety float switch. The white leads from this switch extend from beneath the pump cover. This switch
should be installed in series with the field wire that connects the blue (#5) lead from the Quest Dehumidifier to the blue (#5) lead
on the control panel.
If the pump fails, this switch opens the compressor control circuit and stops water production before the reservoir overflows. The
Quest Dehumidifier will continue to ventilate or circulate air as normal, but will not dehumidify until this switch closes.

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BLK (CORD)
BLK (CORD)
LINE NEUTRAL
WHT (CORD)
WHT-22, WHT (CORD)
BLK-21
BLK-20
BLK-8,20
BLK-8
YEL-11
YEL-11, 24 BLU-25
24V
YEL-9 RED-14, 15
RED-15, 16
COM
DEHU FAN DAMPER
COMMON
DEHUMIDISTAT
WHT-22
24V
BLU-2
BLU-19
BLU-23
GRN-17
GRN-12
BLU
YEL-6
COMP.
RELAY
BLOWER
RELAY
3A
BREAKER
COMP.
RELAY RELAY
RELAY
COIL
BLOWER
RELAY
COIL
COIL
COMP.
BLOWER
DEFROST
SWITCH
XFMR
LINE
RED-5
RED-5, BLU-2
RED-14
RED-16
RED-13
GRN
GRN-10
GRN-4
4038112
BLK-1
BRN-3 BRN
BLK-7
BLK
BLOWER
CAPACITOR
COMP.
CAPACITOR
YEL-18, 24
YEL-18
8. Wiring Diagram

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50Hz Quest 155 Installation, Operation and Maintenance Instructions
16 www.QuestClimate.com
[email protected]
9. Service Parts List
Item Part No Qty Description
1 4039391 1 Air Filter 16x20x2" MERV-13
2 4026221 4 Foot, Leveling, 5/16-18 x 2.25
3 4031085-02 1 Condenser Coil
4 4031086-05 1 E-Coat Evaporator Coil
5 4029510 1 Filter/Drier
6 4028251 1 Compressor
4036967 1 Defrost Switch NOT SHOWN
Item Part No Qty Description
7 4028254 1 Impeller
8 4033032-02 1 Capacitor, Run, 45 MFD, 370V
9 4035235-01 1 Capacitor, Fan, 5 MFD, 370V, Dry
10 4020924 1 Relay, SPDT, 24V, 15A
11 4022484 1 Relay, SPST, 24V, 30A
12 4031406 1 XFMR, 240V, 50/60Hz, 24V, 40VA
4036559 1 Circuit Breaker NOT SHOWN
2
3456
7
8
9
10
11
12
1
PART NO. QTY. DESCRIPTION
4036668 2 Bracket, Hanging (2 Required)
4028607 1 Supply Duct Kit
4028610 1 Return Duct Kit
PART NO. QTY. DESCRIPTION
4028531 1 DEH 3000R Control, Remote
4020175 1 Controller, Humidity
10. Optional Parts List

1-877-420-1330
50Hz Quest 155 Installation, Operation and Maintenance Instructions
17 www.QuestClimate.com
[email protected]

1-877-420-1330
50Hz Quest 155 Installation, Operation and Maintenance Instructions
18 www.QuestClimate.com
[email protected]
Quest 155 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 155 dehumidifier, and may not
be assigned or transferred.
FIRST YEAR WARRANTY: Therma-Stor LLC warrants that, for one (1) year the Quest 155 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 THIRD YEAR WARRANTY: Therma-Stor LLC further warrants that for a period of thre (3)
years, the condenser, evaporator, and compressor of the Quest 155 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 155 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 155 Dehumidifier is out of service while awaiting covered warranty
service).
UPON THE EXPIRATION OF THE WRITTEN WARRANTY APPLICABLE TO THE Quest 155 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 155 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.

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Quest 155 de 50 Hz Instrucciones de instalación, uso y mantenimiento
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[email protected]
Garantía limitada del deshumidificador Quest 155
GARANTE:
Therma-Stor LLC
4201 Líen RD
Madison, WI 53704
Teléfono: 1 -877-420-1330
QUIÉN ESTÁ CUBIERTO: Esta garantía se extiende sólo al consumidor final original del deshumidificador Quest 155, y
no puede asignarse o transmitirse.
GARANTÍA DEL PRIMER AÑO: Therma-Stor LLC garantiza que, por un (1) año el deshumidificador Quest 155
funcionará sin defectos en sus materiales o fabricación, o Therma-Stor LLC, a su elección, reparará o reemplazará las
partes defectuosas de forma gratuita.
GARANTÍA DEL SEGUNDO AL TERCER AÑO: Además, Therma-Stor LLC garantiza que por un período de tres (3)
años, el condensador, evaporador y compresor del deshumidificador Quest 155 funcionarán sin defectos en sus materiales
o fabricación, o Therma-Stor LLC, a su elección, reparará o reemplazará las partes defectuosas, siempre y cuando los
costos por mano de obra y transporte de las partes sean asumidos por el consumidor final.
RESPONSABILIDADES DE USUARIO FINAL: La inspección por garantía debe realizarse por un inspector autorizado
por Therma-Stor LLC. Si el usuario final es incapaz de localizar u obtener una inspección por garantía de un inspector
autorizado, deberá llamar a Therma-Stor LLC al número anterior y preguntar por el Departamento de inspección de
Therma-Stor LLC, que programará el servicio de inspección cubierto por la garantía. La inspección por garantía se
realizará durante horas laborales regulares.
El usuario final debe presentar un recibo de compra (arriendo) cuando se lo solicite, mediante la tarjeta de garantía o
cualquier otro medio razonable. El usuario final es responsable por el cuidado normal. Esta garantía no cubre cualquier
defecto, avería, etc. que resulte del uso indebido, abuso, falta de cuidado normal, corrosión, congelación, manipulación,
modificación, reparación o instalación no autorizada o indebida, accidentes, eventos naturales o cualquier otra causa más
allá del control razonable de Therma-Stor LLC.
LIMITACIONES Y EXENCIONES: Si cualquier parte del deshumidificador Quest 155 es reparada o reemplazada,
la nueva parte será cubierta sólo por el período de garantía restante de la parte original (pero todos los períodos de
garantía se extenderán por el período de tiempo, si existiera, que el deshumidificador Quest 155 estuvo fuera de servicio
esperando el mantenimiento cubierto por garantía).
LUEGO DE EXPIRAR LA GARANTÍA ESCRITA APLICABLE AL DESHUMIDIFICADOR Quest 155 O
CUALQUIER PARTE DEL MISMO, TODAS LAS OTRAS GARANTÍAS SUPUESTAS POR LEY, INCLUYENDO
COMERCIABILIDAD Y ADECUACIÓN PARA UN FIN ESPECÍFICO, TAMBIÉN EXPIRARÁN. TODAS LAS
GARANTÍAS DE THERMA-STOR LLC SON DECLARADAS EN EL PRESENTE DOCUMENTO, Y NO PUEDE
REALIZARSE NINGÚN RECLAMO EN CONTRA DE THERMA-STOR LLC DEBIDO A UNA GARANTÍA
ORAL. BAJO NINGÚN CASO THERMA-STOR LLC, EN RELACIÓN CON LA VENTA, INSTALACIÓN, USO,
REPARACIÓN O REEMPLAZO DE CUALQUIER DESHUMIDIFICADOR Quest 155 O PARTE DEL MISMO,
SERÁ RESPONSABLE POR CUALQUIER DAÑO INDERECTO O CONSECUENTE, INCLUYENDO PERO
SIN LIMITACIÓN, DAÑO POR AGUA (EL USUARIO FINAL DEBE TOMAR PRECAUCIONES CONTRA EL
MISMO), GANANCIAS PERDIDAS, RETRASOS O PÉRDIDA DE USO O CUALQUIER DAÑO A BIENES
MUEBLES O INMUEBLES.
Algunos estados no permiten limitaciones sobre cuánto perdura una garantía implícita, y algunos no permiten la exención
o limitación de daños incidentales o consecuentes, así que algunas de estas limitaciones pueden no aplicarse a usted.
DERECHOS LEGALES: Esta garantía le concede derechos legales específicos y usted podría tener otros derechos que
varían de estado a estado.

1 -877-420-1330
Quest 155 de 50 Hz Instrucciones de instalación, uso y mantenimiento
17 www.QuestClimate.com
[email protected]