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thermastor Quest 335, Installation, Operation And Maintenance Instructions

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thermastor Quest 335 Installation, Operation And Maintenance Instructions Download Page 9

Quest 335 

Installation, Operation and Maintenance Instructions

Disconnect 

power cord 

black wire 

Wire harness 

black wire 

Wire harness 

white wire 

Disconnect 

power cord 

white wire 

Disconnect 

power cord green wire 

from ground stud 

Remove cord 

retention 

bracket 

Remove 

bushing from

7/8” hole 

Disconnect POWER CORD BLACK wire from terminal 
Disconnect POWER CORD WHITE wire from terminal. 
Use 11/32” driver to remove nut from ground stud and disconnect POWER CORD GREEN wire from ground stud. 

Remove the 2 screws holding the cord retention bracket using T25 Torx driver and remove retention bracket. 
Remove power cord and black bushing. 
Route incoming power service wires through 7/8” hole and secure using clamps intended for the conduit or cable used. 

1-877-420-1330

9 

Summary of Contents for Quest 335

Page 1: ...of workmanship and function Patent thermastor com patents Features 208V and 230V 60Hz Industry leading efficiency Patented multi coil refrigeration system High efficiency variable speed impeller Quiet operation Superior air filtration MERV 13 standard Auto restart after loss of power Environmentally friendly R410A refrigerant Low voltage external control On Board digital controls Water Removal Rat...

Page 2: ...umidistat 12 5 1B External Control Options 13 5 2 External Control 14 6 Maintenance 14 6 1 Standard Air Filter 14 6 2 Impeller Fan Oiling 14 7 Service 15 7 1 Warranty 15 7 2 Technical description 15 7 3 Troubleshooting 15 7 4 Refrigerant Charging 17 7 5 Impeller Fan Replacement 17 7 6 Compressor Capacitor Replacement 17 7 6A Checking Compressor Motor Circuits 17 7 6B Replacing Burned Out Compresso...

Page 3: ...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 qualifed person in ...

Page 4: ...form to unifed standard UL 60335 2 40 CSA C22 2 60335 2 40 US Patents D570 988 8 069 681 9 052 132 3 Specifcations 80 F 60 RH Unit 4042500 Quest 335 Blower Tested with duct collars on 1000 CFM 0 0 WG 1000 CFM 0 2 WG 1000 CFM 0 4 WG Power Watts 1565 Supply voltage 208V and 230V 1 Phase 60 Hz Current Draw Amps 6 9A 230V 7 9A 208V Energy Factor L kWh 4 4 Operating Temp 56 F 95 F Water Removal Pints D...

Page 5: ...nterrupter protected circuit is required Install the remote hygrostat in a central area of the structure where it will sense the relative humidity of the structure accurately Do not install the hygrostat 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 335 Dehu...

Page 6: ... pipe An optional condensate pump kit may be installed if a lift is required to dispose of the condensate Optional parts list for information on the kit Follow Diagram Quest 335 H 4 J 2 L 6 75 Vent Place vent after the trap Vent should be open Height of vent should be higher than drain outlet Cap A clean out can be placed before trap but must be sealed with a cap Drain Line Drain line should go in...

Page 7: ... Quest 335 22 2 16 6 3 8 threaded rod Intake Air Treated Air Parts Needed 4 pieces 3 8 threaded rod not included 4 3 8 threaded jam nuts not included 3 8 Jam Nuts Threaded rods should be engaged no less than 2 into machine ...

Page 8: ...OULD RESULT IN DEATH SERIOUS BODILY INJURY AND OR PROPERTY DAMAGE ONLY QUALIFIED SERVICE PEOPLE SHOULD SERVICE THIS UNIT Tools Required T25 Torx Driver 11 32 Driver Following all local and national electrical codes and standards route electrical service to the location that the dehumidifer will be installed Remove 7 screws on access panel using T25 Torx driver remove panel 8 ...

Page 9: ...7 8 hole Disconnect POWER CORD BLACK wire from terminal Disconnect POWER CORD WHITE wire from terminal Use 11 32 driver to remove nut from ground stud and disconnect POWER CORD GREEN wire from ground stud Remove the 2 screws holding the cord retention bracket using T25 Torx driver and remove retention bracket Remove power cord and black bushing Route incoming power service wires through 7 8 hole a...

Page 10: ...o terminal block as shown Place GREEN jumper wire ring terminal on ground stud and use 11 32 driver to secure nut to stud Attach incoming service LINE 1 wire to BLACK jumper wire with the provided wirenut Attach incoming service LINE 2 wire to WHITE jumper wire with the provided wirenut Attach incoming service GROUND wire to GREEN jumper wire with the provided wirenut 10 ...

Page 11: ...5 If factory duct kit accessory was purchased follow instructions included with duct kit If owner chooses to have a licensed HVAC contractor fabricate a duct kit please follow the drawing below for safe zones for self tapping screws HATCH AREA REPRESENTS SAFE ZONE FOR FASTENERS 8 1 0 8 1 0 1 0 8 4 8 5 1 0 1 0 9 11 ...

Page 12: ...e on and the compressor will be of during defrost Filter Reset Filter reset button will light up after the fan has been running for 2 000 hours or if the pressure switch detects excessive pressure build up indicating that the flter must be changed After changing the flter press and hold the flter reset button to reset the 2 000 hour timer Light fashes while button is held Dark Mode Press the Dark ...

Page 13: ...activate the DEHUM input on the terminal block see section 5 1B This must be activated when an external control is used to control RH When Terminal Control is active the internal RH sensor is disabled 5 1B Quest 335 External Control Options Quest ofers two external control options 4028531 QUEST DEH 3000R CONTROL WIRING DIAGRAM 24VAC DMPR COMP FAN DEHU 24V FAN COM DEH 3000R NOTE 22 ga wire needed f...

Page 14: ...ng any buttons for 6 seconds or by pressing the FAN button This will disable flter life compensation functionality 6 Maintenance WARNING NOTE Do not operate the unit without the flter or with a less efective flter The heat exchange coils inside the unit could become clogged and require disassembly to clean Filter non compliance invalidates the product warranty 6 1 Standard Air Filter The Quest 335...

Page 15: ... liquid then passes through a flter drier and capillary tubing 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 fooded condition which means that all the evaporator tubes contain liquid refrigerant during normal operation A fooded evaporator should maintain nearly...

Page 16: ...or 1 Defrost thermostat loose or defective 2 Low refrigerant charge 3 Dirty air flter s or air fow 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...

Page 17: ...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 ...

Page 18: ...ding 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 temp...

Page 19: ...5 Dehumidifer the hygrostat and the feld control wiring 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 set point It opens when the RH drops 4 to 6 below the set point If the Quest 335 Dehumidifer does not run try turning the humidity control Down using arrow on control pad If it then runs the ...

Page 20: ...trigger This should happen in all states not just when in Terminal control Float inputs are open Error code E4 Compressor off fan off Use command Set Dehu_state off 5 Evaporator Sensor Error Invalid reading above 200 F or below 20 F from the evaporator sensor for 12 seconds or more Valid evaporator sensor reading for 12 seconds or more Error code E5 Dehu Mode 15 minutes Defrost Mode 30 Minutes Rep...

Page 21: ... A BLU 3 BLK 5 YEL 12 YEL 11 BLK 8 SERIAL SWITCH PRESSURE SWITCH BLU 1 BLU 2 DISPLAY BOARD WHT 6 WHT 9 YEL 3 GRN 1 RED 2 WHT 10 BLK 4 ORG 4 FILTER AIR PRESSURE SWITCH COMPRESSOR RELAY RED 18 YEL 17 GRY 16 BLU 15 VIO 13 WHT 14 GRN 7 2 POSITION TERMINAL BLOCK 21 ...

Page 22: ...cket 12 4028459 Pressure Tap 13 4042291 Control Board 14 4042467 Relay Item Part No Qty Description 15 4042505 Block Wiring 16 4041892 Clip Cord Retention 17 4042486 Switch Pressure 18 4022160 Clamp Capacitor 19 4035949 03 Capacitor 20 4042483 Fan Motorized Impeller 21 4036494 Cord Optional Parts List PART NO QTY DESCRIPTION 4022220 1 Pump Kit 110 120V 4028607 1 Supply Duct Kit 4028610 1 Return Du...

Page 23: ...4 1 3 5 2 6 7 21 9 8 10 11 12 20 19 18 17 16 15 14 13 23 ...

Page 24: ...oes not cover any defect malfunction etc resulting from misuse abuse lack of normal care corrosion freezing tampering modifcation 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 Dehumidifer part is repaired or replaced the new part shall be warranted for only the remainder...

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