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QUEST 335
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
QUESTCLIMATE.COM
(877) 420-1330
5.2 QUEST 335 EXTERNAL CONTROL
Remove the cover from the user interface to expose the terminal block inputs & outputs.
Quest 335 Terminal Block Control Operations:
DEHUM:
Dehumidification (Fan and Compressor) Control Input.
24VAC:
Transformer High Side Output to External Control.
Fan:
Fan Control Input.
24V COM: 24VAC Power Transformer Neutral Side Output to External Control.
FLOAT:
External Low Voltage Float Switch or Water Sensor Input (Use Normally Closed Switch).
FLOAT:
External Low Voltage Float Switch or Water Sensor Input (Use Normally Closed Switch).
Alarm:
Normally Closed Relay Output - Indicates when dehumidifier is in an alarm state.
Alarm:
Normally Closed Relay Output - Indicates when dehumidifier is in an alarm state.
NOTE: Alarm terminals are used to interface with a remote alarm or building automation
system. The terminals switch when the unit has a malfunction and are factory set to
“normally closed” but can be changed to “normally open”.
6. MAINTENANCE
WARNING!
NOTE: Do not operate the unit without the filter or with a less
effective filter. 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 Dehumidifier ships with a standard MERV 13 efficient pleated fabric filter. This filter should
be checked every six months. Operating the unit with a dirty filter will reduce dehumidifier capacity and
efficiency and may cause the compressor to cycle off and on unnecessarily on the defrost control.
To access the air filter, remove the filter access panel from the end of the Quest 335 Dehumidifier.
The filter should be readily visible and can be removed by pulling it straight out of the Quest 335
Dehumidifier.
We recommend changing the filter at least every 6 months. For agriculture we recommend changing the
filter with every grow cycle.
6.2 IMPELLER FAN OILING
The impeller fan motor is factory lubricated for many years of normal operation, and no further oiling is
required.
NOTE: 22 ga wire needed for sensor
To order, contact your dealer, call 1-877-420-1330, or go to:
www.questclimate.com/product-category/accessories
DAISY CHAIN
