quest
Asset Protection and IAQ Solutions
quest
1-800-533-7533
Quest
DRY
150 Installation, Operation and Maintenance Instructions
www.thermastor.com
6. Maintenance
6.1 Standard Air Filter
The Quest
DRY
150 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 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
DRY
150. The filter should be
readily visible and can be removed by pulling them straight out of the Quest
DRY
150.
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 effective 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.
6.2 High Efficiency Air Filter
An optional high efficiency pleated microglass paper filter is available for the Quest
DRY
150 . This filter
is rated as 90%-95% efficient by the ASHRAE Dust Spot test method 52-76. The high efficiency 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 efficiency 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 efficiency filter requires replacement. Be careful not to damage the fabric
media when handling the high efficiency pleated paper filter. Do not attempt to clean the high efficiency
pleated paper filter. It should be replaced when it becomes restrictive.
6.3 Impeller Fan Oiling
The impeller fan motor is factory lubricated for many years of normal operation, and no further oiling is
required.
6.4 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.
7. Service
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 1-800-533-7533 for warranty claim authorization and technical
assistance.
FOR HVAC INSTALLER ONLY
