HI-E DRY 140

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.
• If used near a pool, spa or wet area; 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.
• The Hi-E Dry 140 must always be used in the horizontal position.
• 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 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.
• 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 3 ft (1m) 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.
• 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.
• Not intended for use at altitudes over 6500 ft (2000M).

WARNING: Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance, or an operating electric heater. Do not pierce or burn. Be aware that refrigerants may not contain an odor.

1. Intended Application

The Quest Hi-E Dry 140 dehumidifier is designed to operate in temperatures between 56 F 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 Hi-E Dry 140 dehumidifier, water intrusion and air infiltration problems should be addressed or noted in calculations.

2. Registrations

The Quest Hi-E Dry 140 dehumidifier conforms to unified standard UL 60335-2-40. Patent: thermastor.com/patents

3. Specifications

@ 80 F / 60% RH

* 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.

4. Location

4.1 Electrical Requirements

The Quest Hi-E Dry 140 plugs into a common grounded outlet on a 15-amp circuit. It draws 6.8 amps at 80°F, 60% RH. If used in a wet area, a ground fault interrupter (GFI) is required. If an extension cord is required, it must have a minimum of 14 gauge conductors if 25 feet long or less, and 12 gauge conductors if greater than 25 feet long.

The Quest Hi-E Dry 140 dehumidifier can be installed in a variety of locations to meet the owner's needs. In all cases keep the following cautions in mind:

• The minimum floor area of the room shall be 28 m2 (square meters).
• Keep any required ventilation openings clear of obstruction.
• Ducts connected to the dehumidifier shall not contain a POTENTIAL IGNITION SOURCE.
• Supply and return air shall be directly ducted to the space. Open areas such as false ceilings shall not be used as a return air duct.

Unventilated Areas

• Unventilated Areas where the Quest Hi-E Dry 140 dehumidifier is installed or stored need to be so constructed that should any refrigerant leak, it will not stagnate so as to create a fire or explosion hazard.
• Quest Hi-E Dry 140 dehumidifier shall not be stored or ducted into one or multiple rooms with continuously operating open flames (for example an operating gas appliance) or other POTENTIAL IGNITION SOURCES (for example an operating electric heater, hot surfaces). A flame-producing device may be installed in the same space if the device is provided with an effective flame arrest.

5. Transporting

The Quest Hi-E Dry 140 features a high-impact structural foam housing which protects the unit. It is recommended the units are properly secured for transport. The Quest Hi-E Dry 140 dehumidifier must always be on its base when transported by vehicle. To extend handle to the 42" and 50" handle position, use the 'push' button centered beneath the handle.

6. Operation

Place dehumidifier inside space, place condensate hose into a drain, or a very large container, and turn on. To increase effectiveness of the dehumidifier, make sure all windows and doors are closed to the outside and seal off the wet area from any unaffected areas.

6.1 Control Panel

When presented with Control Panel Selection Boxes in the control panel, the black box with the white lettering will be the active selection.

Control Panel Key

The control panel features the following buttons:

• POWER: Turns the unit on or off.
• NEXT: Advances to the next menu or option.
• SET: Scrolls through available values or enables/disables settings.
• PURGE: Manually initiates a condensate purge cycle.

6.2 Startup & Standby Mode

When plugged in but without pushing the power button, the display communicates that the machine is in Standby mode and ready to be powered on. In Standby Mode, the display shows the current job and life hours on the fourth line.

6.3 Power Button

Press the Power button to turn the dehumidifier on. The unit begins a Powering Up sequence, displaying a screen that allows the compressor time to acclimate before starting up.

Press and hold the Power button to turn the dehumidifier off. The dehumidifier goes through a powering-down cycle. The default shut-down time is three minutes plus 20 seconds for a final purge. The shutdown time can be changed via the menu.

IMPORTANT: Unplugging the unit without running the shutdown sequence will allow water to remain in the unit after use. Tilting the unit more than 70 degrees on the handle side or more than 20 degrees on the non-handle side may result in water spillage. Tilting the unit without running the final purge may result in water spillage.

6.4 Dashboard Screen

While in Humidistat Mode (default), the dashboard displays:

• Inlet: Temperature, RH, Grains/lb
• Outlet: Temperature, RH, Grains/lb
• Hours: Job hours and Life hours of the dehumidifier
• Humidistat SetPoint: Current RH selection

NOTE: The display will automatically go dark upon startup or after 10 minutes. To see the display again, press any button.

6.5 Navigation

Press the NEXT button to advance to the next menu. Press the SET key to scroll through available values. When two boxes are presented, the white box indicates the selected choice. Press the Purge key to return to the main dashboard.

6.6 Purging

During normal operation, the pump automatically cycles when the reservoir is full. Press the PURGE button to remove condensate manually from the reservoir. The display communicates that the machine is purging on the fourth line of the dashboard and shows a 20-second countdown timer. This momentarily replaces grain depression until the machine has finished purging.

6.7 Condensate Removal

The Quest Hi-E Dry 140 is equipped with an internal condensate pump to remove condensed water. This allows condensate to be pumped up to 20 feet with the attached hose. If condensate must be pumped more than 20 feet above the unit, a second pump must be added. The condensate pump automatically purges when the reservoir is full. Use the PURGE button to manually remove condensate.

For help with the "Reservoir full: check float, pump, and hose" error, see section 9.4 Troubleshooting.

6.8 Defrost Cycle

The display communicates that the machine is defrosting on the fourth line of the dashboard. This momentarily replaces grain depression until the machine has finished defrosting.

If the low-side refrigerant temperature drops below the temperature set point due to excessive frost formation on the evaporator coil, the compressor cycles off. The air mover continues to run, increasing speed to normal, and causes air to flow through the evaporator coil to melt the ice. When the air temperature and/or humidity increases, the evaporator temperature rises, and the thermistor ends the defrost cycle at the temperature set point.

6.9 Shutdown Sequence / Powering Off

Press the Set button to adjust the Power Down Time in one-minute increments ranging from 3 to 20 minutes. The Power Down Time allows the blower to run to remove water from the coil and the evaporator to acclimate to ambient conditions. At the end of the shutdown time, the unit automatically purges to remove any remaining water. Proper shutdown is dependent on conditions; increasing shutdown time helps ensure no residual water remains.

IMPORTANT: UNPLUGGING THE UNIT WITHOUT RUNNING THE SHUTDOWN SEQUENCE WILL ALLOW WATER TO REMAIN IN THE UNIT AFTER USE. Tilting the unit more than 70 degrees on the handle side or more than 20 degrees on the non-handle side may result in water spillage. Tilting the unit without running the final purge may result in water spillage.

6.10 Menus

DEVICE NAME

The following information is displayed on this screen: VIHW (Part Number for the Display Board), VIFW (Firmware Version on the Display Board), PWHW (Part Number for the Power Board), PWFW (Firmware Version on the Power Board), UUID (A unique identifier).

JOB HOURS

Press and hold the key for three seconds to reset the job hours from any screen. The life hours are fixed and cumulative from the first use.

QUIET MODE

Press the Set button to enable Quiet Mode. In Quiet Mode, the CFM is reduced to 225 (75% of maximum). The unit defaults to Quiet Mode OFF when power cycled.

ATTENTION: Quiet mode decreases fan speed, reducing air flow. This will decrease capacity (water condensed from the air) and could cause the unit to enter defrost.

INLET DEW POINT

The screen displays the ambient dew point.

RH CALIBRATION

The Intake RH Reset allows calibration of the Hi-E Dry 140 to match a differing hygrometer. Use the Set Key to increase the reading on the screen with your meter. Push the Set and Next keys simultaneously to lower the number. Recalibrating the HI-E Dry is not recommended in most scenarios.

TEMPERATURE UNITS

Press the Set button to toggle the temperature units between °F and °C. Press the Next button to confirm selection and advance to the next screen. The white box indicates the selected setting.

WATER UNITS

Press the Set button to toggle the humidity units between RH, grains, and g/Kg. This affects the readout on the right of the home screen (lines one and two) showing inlet and outlet conditions. The white box indicates the selected setting.

HUMIDISTAT MODE

The default mode is Humidistat "ON" with a default setpoint of 50% RH. The HI-E Dry 140 operates until the setpoint is achieved, then goes into standby mode. Press the Set button to toggle Humidistat Mode On/Off. With Humidistat mode off, the dehumidifier runs continually with no set point. Press the Next button to advance. If Humidistat mode is enabled, proceed to Humidistat Set point; otherwise, proceed to Humidity Units.

HUMIDISTAT SET POINT

Press the SET button to increase the set point RH% in 1% increments (20% RH to 80% RH, then loops back). Press both NEXT and SET buttons simultaneously to decrease the setpoint. Press the Next button to confirm selection and advance.

HUMIDISTAT FAN MODE

Press the Set button to toggle the Humidistat Fan mode from Always On to Auto. Press the Next button to confirm selection and advance.

ABOUT

The about screen provides the following information: VIHW: Part Number for the Display Board; VIFW: Firmware Version on the Display Board; PWHW: Part Number for the Power Board; PWFW: Firmware Version on the Power Board; UUID: A unique identifier.

7. Ducting

Ducting instructions are not detailed in this section of the provided text, but it is mentioned that supply and return air shall be directly ducted to the space and that ducts connected to the dehumidifier shall not contain a POTENTIAL IGNITION SOURCE.

8. Maintenance

8.1 Air Filter

The QUEST Hi-E Dry 140 is equipped with a pleated media air filter that must be checked regularly for optimal performance. The standard filter is a MERV-10 high-efficiency filter. Operating the unit with a dirty filter reduces capacity and efficiency and may cause unnecessary compressor cycling. The filter can generally be vacuumed clean several times before replacement. Replacement filters can be ordered from the manufacturer (#4038558) or purchased locally.

IMPORTANT: DO NOT OPERATE THE UNIT WITHOUT THE FILTER OR WITH A LESS EFFECTIVE FILTER AS THE COILS INSIDE THE UNIT COULD BECOME CLOGGED AND REQUIRE DISASSEMBLY TO CLEAN.

Filter Replacement Steps:

1. Slide the filter holder out using the handle.
2. It is not necessary to completely remove the filter holder to change the filter.
3. Carefully replace the filter in the air flow direction.
4. Slide the filter holder back into position.

8.2 Storage and Freeze Protection

When storing the Hi-E Dry 140 between uses, consider water trapped inside to prevent biological growth and freezing damage. Precautions to remove as much water as possible before storage are recommended.

1. Use the pump PURGE button to reduce the water level in the reservoir.
2. Stretch the hose flat to drain it completely. Raise one end above your head and spool hose while draining water out the other end.
3. To reduce biological growth, flush the unit with a bio-fungicide approved for use with copper, aluminum, and polyethylene. To flush:
   1. Run the hose to a drain.
   2. Plug in the unit but do not turn it on.
   3. Remove the air filter. Slowly pour a quart of the antimicrobial through the heat exchanger.
   4. Hold in the pump purge switch to reduce the water level in the reservoir.
   5. Flush with water.
4. If the unit will be exposed to freezing temperatures, after purging, remove the upper housing and pour 1 cup (8oz) of a propylene glycol-based anti-freeze through the heat exchanger. It will flow down into the pump reservoir. Do NOT purge the solution out of the unit.
5. Dirty filters should be changed prior to long-term storage to prevent biological growth on the filter.

9. Service

WARNING: SERVICING THE QUEST HI-E DRY 140 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: DO NOT OPERATE UNIT WITHOUT THE TOP COVER IN PLACE.

9.1 Service Personnel

Only qualified HVAC or electrical contractors are allowed to conduct maintenance, service, and/or repair operations on Quest Hi-E Dry 140 machines. This includes breaking into the refrigerating circuit, opening sealed components, and/or opening ventilated enclosures.

Prior to beginning work, safety checks are necessary to minimize the risk of ignition:

• For repair to the REFRIGERATING SYSTEM, a qualified contractor should first establish a controlled procedure to minimize the risk of flammable gas or vapor presence.
• All maintenance staff and others working in the local area shall be instructed on the nature of work. Work in confined spaces shall be avoided.
• The area shall be checked with an appropriate refrigerant detector prior to and during work to ensure awareness of potentially toxic or flammable atmospheres. Ensure leak detection equipment is suitable for all applicable refrigerants (non-sparking, adequately sealed, or intrinsically safe).
• If hot work is to be conducted on the refrigerating equipment or associated parts, appropriate fire extinguishing equipment shall be available. Have a dry powder or CO2 fire extinguisher adjacent to the charging area.
• No person carrying out work on a REFRIGERATING SYSTEM that involves exposing pipework shall use any sources of ignition that may lead to the risk of fire or explosion. All possible ignition sources, including smoking, should be kept sufficiently far away. Before work, the area around the equipment must be surveyed for flammable hazards or ignition risks. "No Smoking" signs shall be displayed.
• Ensure the area is in the open or adequately ventilated before breaking into the system or conducting hot work. Ventilation should continue during work to safely disperse any released refrigerant, preferably expelling it externally.

The following checks apply to installations using flammable refrigerants:

• Where electrical components are changed, they shall be fit for purpose and to the correct specification. Therma-Stor's maintenance and service guidelines shall be followed. Consult Therma-Stor's technical department if in doubt.
• The REFRIGERANT CHARGE must be in accordance with the room size.
• Ventilation machinery and outlets must be operating adequately and not obstructed.
• Markings on the equipment must remain visible and legible; illegible markings shall be corrected.
• Dehumidifiers must be installed where they are unlikely to be exposed to substances that may corrode refrigerant-containing components, unless components are constructed of corrosion-resistant materials or are suitably protected.

9.1A Checks to Electrical Devices

Repair and maintenance to electrical components include initial safety checks and component inspection. If a fault compromises safety, no electrical supply shall be connected until it is resolved. If correction is not immediate but operation must continue, an adequate temporary solution shall be used and reported to the owner.

Initial safety checks include:

• Capacitors must be discharged safely to avoid sparking.
• No live electrical components or wiring should be exposed while charging, recovering, or purging the system.
• Earth bonding continuity must be ensured.

9.1B Repairs to Sealed Components

During repairs to sealed components, all electrical supplies must be disconnected before removing sealed covers. If an electrical supply is necessary during servicing, a permanently operating leak detection system must be located at the most critical point.

Particular attention must be paid to ensure that working on electrical components does not alter the casing in a way that affects the level of protection. This includes damage to cables, excessive connections, non-original terminals, damaged seals, or incorrect gland fitting.

• Ensure the equipment is mounted securely.
• Ensure seals or sealing materials have not degraded to the point where they prevent the ingress of flammable atmospheres.
• Replacement parts shall be in accordance with Therma-Stor specifications.

9.1C Repairs to Intrinsically Safe Components

Do not apply permanent inductive or capacitance loads without ensuring they do not exceed permissible voltage and current for the equipment. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere. Test apparatus must be correctly rated.

Replace components only with parts specified by Therma-Stor. Other parts may ignite refrigerant in the atmosphere from a leak.

NOTE: The use of silicon sealant can inhibit some leak detection equipment. Intrinsically safe components do not require isolation prior to working on them. Check that cabling is not subject to wear, corrosion, excessive pressure, vibration, sharp edges, or other adverse environmental effects, considering aging or continual vibration from compressors or fans.

9.1D Detection of Flammable Refrigerants

Under no circumstances shall potential sources of ignition be used for searching for or detecting refrigerant leaks. A halide torch (or any other detector using a naked flame) shall not be used.

Acceptable leak detection methods include:

• Electronic leak detectors: For flammable refrigerants, sensitivity may be inadequate or require re-calibration. Detection equipment shall be calibrated in a refrigerant-free area. Ensure the detector is not a potential ignition source and is suitable for the refrigerant used. Leak detection equipment shall be set at 25% LFL of the refrigerant and calibrated to 454B.
• Leak detection fluids: Suitable for most refrigerants, but avoid detergents containing chlorine, as chlorine can react with refrigerant and corrode copper pipe. Examples include the bubble method and fluorescent method agents.

If a leak is suspected, all open flames shall be removed/extinguished. If a refrigerant leak requires brazing, all refrigerant must be recovered from the system or isolated in a part of the system remote from the leak, according to Clause DD.9 of 60335-2-40.

9.1E Refrigerant Removal and Evacuation

When breaking into the refrigerant circuit, conventional procedures shall be used. For FLAMMABLE REFRIGERANTS, best practice is important due to flammability. The following procedure shall be adhered to:

• Remove refrigerant.
• Purge the circuit with inert gas (optional for A2L).
• Evacuate (optional for A2L).
• Purge with inert gas (optional for A2L).
• Open the circuit by cutting or brazing.

The REFRIGERANT CHARGE shall be recovered into correct recovery cylinders. Compressed air or oxygen shall not be used for purging. Ensure the vacuum pump outlet is not close to POTENTIAL IGNITION SOURCES and that ventilation is available.

9.1F Charging Procedures

In addition to conventional charging procedures, follow these requirements:

• Ensure contamination of different refrigerants does not occur when using charging equipment. Hoses or lines shall be as short as possible.
• Cylinders shall be kept in an appropriate position.
• Ensure the REFRIGERATING SYSTEM is grounded prior to charging with refrigerant.
• Label the system when charging is complete (if not already).
• Take extreme care not to overfill the REFRIGERATING SYSTEM.
• Prior to recharging, the system shall be pressure-tested with the appropriate purging gas. The system shall be leak-tested upon completion of charging but prior to commissioning. A follow-up leak test shall be carried out before leaving the site.

9.2 Running Diagnostics

DIAGNOSTIC MODE

Contact Therma-Stor Tech Support for help with diagnostic mode: 877-420-1330. Diagnostics mode is used by technical support to help diagnose problems.

DIAGNOSTIC MODE - FLOAT SWITCH

This display communicates the current status of the Float Switch. Press the Next button to advance. The float switch will be "Up" or "Down".

DIAGNOSTIC MODE - PUMP

Press the Set button to toggle the Pump On/Off. Press the Next button to advance. The white box indicates the selected option.

DIAGNOSTIC MODE - FAN

Press the Set button to toggle the Fan On/Off. Press the Next button to advance.

DIAGNOSTIC MODE - COMPRESSOR

Press the Set button to toggle the Compressor On/Off. Press the Next button to advance.

DIAGNOSTIC MODE - DISPLAY TEST

Press the Set button to start the display test.

DIAGNOSTIC MODE - REFRIGERATION TEST

During a Refrigeration Test, the display communicates the following information:

• Inlet = Temperature and RH/Grains
• Outlet = Temperature and RH/ Grains
• Hours = Life hours only.
• Evaporator Coil = Temperature
• Countdown timer = 20 minutes

Once the 20-minute countdown timer expires, the display automatically advances to show the refrigeration test results: "Refrig. test passed" or "Refrig. test failed".

Press the Next button to return to the first diagnostic test or press and hold the Next button for 3 seconds to return to the dashboard.

9.3 Technical Description

The Quest Hi-E Dry 140 uses a refrigeration system to remove moisture from incoming air and add heat to the discharged air. Hot, high-pressure refrigerant gas flows from the compressor to the condenser coil, where it is cooled and condensed by giving heat to the outgoing air. The liquid refrigerant then passes through a filter/drier and capillary tubing, reducing its pressure and temperature. It enters the evaporator coil, where it absorbs heat from incoming air and evaporates. The evaporator operates in a flooded condition, meaning all evaporator tubes contain liquid refrigerant during normal operation, maintaining constant pressure and temperature across the coil. The mixture of gas and liquid refrigerant leaves the evaporator coil and enters the compressor, which compresses it to high pressure and temperature to repeat the process.

9.4 Troubleshooting

RESERVOIR FULL ERROR: CHECK FLOAT, PUMP, AND HOSE

If the float is up for 60 seconds, the status bar turns red and the screen displays "Reservoir Full: check float, pump, and hose". To clear this error, the float must go down. Ensure the condensate hose is not kinked or blocked and that the float moves freely. If unresolved, call tech support at (877) 420-1330. If left on, the unit will attempt to pump every eight minutes.

NO DEHUMIDIFICATION, CONTROL DOES NOT LIGHT UP AND UNIT WILL NOT TURN ON FROM POWER BUTTON.

1. Unit unplugged or no power to outlet.
2. Defective control board.
3. Loose connection in internal wiring.

SOME DEHUMIDIFICATION, AIR MOVER RUNS CONTINUOUSLY BUT COMPRESSOR ONLY RUNS SPORADICALLY.

1. Unit is in defrost cycle (DEFROST light on).
2. Defrost thermistor defective or loose.
3. Loose connection in compressor circuit.
4. Defective compressor overload.
5. Defective compressor.
6. Defective control board.
7. Upper housing is not sealed to lower housing.

NO DEHUMIDIFICATION, AIR MOVER RUNS BUT COMPRESSOR DOES NOT.

1. Bad connection in compressor circuit.
2. Safety float switch closed (check pump reservoir).
3. Defective compressor capacitor.
4. Defective compressor overload.
5. Defective compressor.
6. Defective control board.

AIR MOVER DOES NOT RUN. COMPRESSOR RUNS BRIEFLY BUT CYCLES ON AND OFF.

1. Loose connection in blower circuit.
2. Obstruction prevents impeller rotation.
3. Defective air mover.

UNIT REMOVES SOME WATER BUT NOT AS MUCH AS EXPECTED.

1. Air temperature and/or humidity have dropped, reducing water removal capacity.
2. Humidity and/or temperature measurement is out of calibration.
3. Defective defrost thermistor.
4. Defective humidity sensor.

UNIT RUNS BUT DOES NOT PUMP WATER.

1. Hose kinked or plugged.
2. Pump motor defective.
3. Pump check valve plugged.
4. Bad connection in pump circuit.
5. Hose disconnected internally.
6. Float switch issue.

UNIT PUMPS WATER AUTOMATICALLY BUT NOT WHEN PURGE BUTTON IS PUSHED.

1. Bad connection in PURGE button circuit.
2. Defective control board.

EVAPORATOR COIL FROSTED CONTINUOUSLY, LOW DEHUMIDIFYING CAPACITY.

1. Defrost thermistor loose or defective.
2. Low refrigerant charge.
3. Dirty air filter or restricted air flow.
4. Upper housing is not sealed to lower housing.

COMPRESSOR RUNS WITH POWER BUTTON OFF.

1. Defective control board.

9.5 Air Mover

The air movement is created by an impeller. If defective, the complete assembly must be replaced.

Replacement Steps:

1. Unplug power cord.
2. Remove the exhaust grill.
3. Disconnect the two impeller leads.
4. Remove the impeller bracket.
5. Remove the four screws holding the impeller to the mounting plate.
6. Reassemble the new impeller using the above procedure in reverse.

9.6 Thermistor Probe

A thermistor is used to sense the temperature of the evaporator coil. It is inserted into the evaporator suction tube sensor pot. To replace the thermistor probe:

Replacement Steps:

1. Unplug the dehumidifier.
2. Remove the access housing.
3. Pull thermistor probe up and out of sensor pot.
4. Remove the electrical box cover (T20 Torx).
5. Unthread thermistor probe wire from harness.
6. Unplug thermistor probe connector on control board.
7. Reassemble the thermistor probe and dehumidifier using the above procedure in reverse.

9.7 Condensate Pump

The internal condensate pump removes water that collects in the reservoir. To replace the condensate pump:

Replacement Steps:

1. Unplug the unit.
2. Remove the access housing.
3. Unplug the pump hose and electrical connector.
4. Remove the pump:
   1. Using pliers, compress and remove spring hose clamps to detach hoses from pump.
   2. Remove 4 T-20 torx screws holding pump and pump cord clamps.
5. Remove pump by lifting up and out of the tabs on the front side of the pump.
6. Check the float switch bracket is mounted correctly.
7. Reinstall in reverse order.

9.8 Float Switch

The float safety switch activates the pump when water rises too high in the condensate reservoir. The float switch also turns off the compressor until the water level lowers and disengages the switch.

IMPORTANT: If the float switch is stuck in the up position for more than 60 seconds, a reservoir full error will occur. Possible causes include a broken pump, a blocked hose, or mechanical binding of the float switch.

To replace the float switch:

1. Unplug the unit.
2. Remove access housing.
3. Remove Pump Cover.
4. Check to see that the float moves freely. If the float needs to be replaced, proceed to step 5.
5. Open the electrical box cover (T20 Torx).
6. Unplug the Float switch wires from the control board.
7. Unscrew the float switch from the bracket.
8. Replace the float switch.

10. Decommissioning

Before decommissioning, ensure familiarity with the equipment and its operation. It is recommended that all refrigerants are recovered safely. Prior to the task, an oil and refrigerant sample should be taken for analysis if re-use is intended. Electrical power must be available.

1. Become familiar with the equipment and its operation.
2. Isolate the system electrically.
3. Before attempting the procedure, ensure:
   • Mechanical handling equipment is available for refrigerant cylinders.
   • All personal protective equipment is available and used correctly.
   • The recovery process is supervised at all times by a competent person.
   • Recovery equipment and cylinders conform to appropriate standards.
4. Pump down the refrigerant system, if possible.
5. If a vacuum is not possible, make a manifold to remove refrigerant from various parts of the system.
6. Ensure the cylinder is situated on scales before recovery.
7. Start the recovery machine and operate according to instructions.
8. Do not overfill cylinders (no more than 80% volume liquid charge).
9. Do not exceed the maximum working pressure of the cylinder, even temporarily.
10. When cylinders are filled correctly and the process is complete, ensure cylinders and equipment are removed from site promptly and all isolation valves on the equipment are closed.
11. Recovered refrigerant shall not be charged into another REFRIGERATING SYSTEM unless it has been cleaned and checked.

10.1 Labelling Decommission Machines

Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. The label shall be dated and signed. For appliances containing FLAMMABLE REFRIGERANTS, ensure labels state the equipment contains FLAMMABLE REFRIGERANT.

10.2 Refrigerant Recovery

When removing refrigerant for servicing or decommissioning, it is recommended that all refrigerants are removed safely. Use only appropriate refrigerant recovery cylinders, ensuring they are designated for the recovered refrigerant and labelled correctly. Cylinders must have a pressure-relief valve and associated shut-off valves in good working order. Empty recovery cylinders should be evacuated and, if possible, cooled before recovery.

Recovery equipment must be in good working order, with instructions at hand, and suitable for all appropriate refrigerants, including FLAMMABLE REFRIGERANTS. Calibrated weighing scales must be available and in good working order. Hoses must have leak-free disconnect couplings and be in good condition. Before using the recovery machine, check its working order, maintenance, and that electrical components are sealed to prevent ignition. Consult the manufacturer if in doubt.

Recovered refrigerant should be returned to the refrigerant supplier in the correct recovery cylinder, with the relevant waste transfer note arranged. Do not mix refrigerants in recovery units or cylinders. If compressors or compressor oils are removed, ensure they have been evacuated to an acceptable level to prevent FLAMMABLE REFRIGERANT remaining within the lubricant. Evacuation must occur before returning the compressor. Only electric heating to the compressor body should be used to accelerate this process. Oil drained from a system must be carried out safely.

11. Service Parts

The following diagram illustrates the location of various service parts:

[Diagram showing numbered parts: 1. Compressor, 2. Power Board, 3. Float switch, 4. Condensate Pump, 5. Impeller, 6. Defrost Thermistor, 7. Exhaust Thermistor, 8. 12" Wheel, 9. Inlet Grill, 10. Air Filter, 11. User Interface, 12. Cord, 13. Condensate Hose, 14. Duct Ring, 15. Outlet Grill, 16. Stem to Barb adapter, 17. Push-to-Connect Elbow, 18. Handle, 19. Stem Bulkhead Fitting (not pictured)]

Service Parts List

12. Wiring Diagram

The wiring diagram shows connections between the DISPLAY BOARD and the POWER BOARD. Key components and their connections include:

• DISPLAY BOARD: Connects to FLOAT SWITCH, PROG SERIAL, THERMISTOR PROBE (TEMP/RH SENSOR), FLOAT EVAP RH, SERIAL PROG.
• POWER BOARD: Receives input from BLACK (CORD), WHITE (CORD). Outputs to THERMISTOR, RED-3, RED-4, BRN-5, BRN-6, GRN-7 (24VDC), WHT-1, BLK-2.
• COMPRESSOR: Connected via YEL-7, BLK-6, RED-5.
• COMPRESSOR CAPACITOR: Connected via RED-5, BLK-6.
• PUMP: Connected via BLU-8, RED-9.
• DC BLOWER: Connected via WHT-12, WHT-3, BLU-8, WHT-10, YEL-11.
• POWER SUPPLY: Connections labeled 1°, 4°, 7°, 2°, 5°, 8°, 3°, 6°, 9°.

The diagram indicates connections for the power cord, compressor, capacitor, pump, and DC blower to the power board and display board.

Warranty Information

WARRANTOR: Therma-Stor LLC, 4201 Lien Rd, Madison, WI 53704. Telephone: 1-800-533-7533.

WHO IS COVERED: This warranty extends only to the original end-user of the Hi-E Dry 140 dehumidifier and may not be assigned or transferred.

FIRST YEAR WARRANTY: Therma-Stor LLC warrants that, for one (1) year, the Hi-E Dry 140 dehumidifier will operate free from defects in materials and workmanship. Therma-Stor LLC will, at its option, repair or replace defective parts free of charge.

SECOND THROUGH FIFTH YEAR WARRANTY: Therma-Stor LLC warrants that for five (5) years, the condenser, evaporator, and compressor will operate free of defects. Therma-Stor LLC will, at its option, repair or replace defective parts, provided that all labor and transportation charges for the parts shall be borne by the end-user.

END-USER RESPONSIBILITIES: Warranty service must be performed by a Servicer authorized by Therma-Stor LLC. If an authorized Servicer cannot be located, contact Therma-Stor LLC Service Department. Warranty service will be performed during normal working hours. The End-user must present proof of purchase upon request. The end-user is responsible for normal care. This warranty does not cover defects 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 part is repaired or replaced, the new part is warranted only for the remainder of the original warranty period. All warranties implied by law, including merchantability and fitness for a particular purpose, expire upon the expiration of the written warranty. Therma-Stor LLC is not liable for any special, indirect, or consequential damages, including water damage, lost profits, delay, or loss of use, in connection with the sale, installation, use, repair, or replacement of the dehumidifier.

Some states do not allow limitations on implied warranty duration or exclusion of incidental/consequential damages, so these limitations may not apply.

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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