Quest CDG 174
Installation, Operation and Maintenance Instructions
1-877-420-1330
7
www.QuestHydro.com
info@QuestHydro.com
3.2 Storage
There are two issues to consider when the Quest CDG 174 is stored between uses and both pertain to the water trapped
in the unit: damage caused by freezing and biological growth. The effect of the trapped water can be greatly reduced if
precautions are taken to remove as much as possible before storage.
1. Use the pump purge switch (see Sec. 2.7 and Fig. 4) to reduce the water level in the reservoir.
2. Stretch the hose flat to drain it completely.
If the unit will not be exposed to freezing temperatures, an alternative way to reduce biological growth is to flush the unit
with a bio-fungicide that is 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 chemical through the top grille so that it drains into the black plastic
slots.
4. Hold in the pump purge switch to reduce the water level in the reservoir.
5. Flush with water.
4 Service
CAUTION: Servicing the
Quest CDG 174
with its high pressure refrigerant system and high voltage circuitry presents
a health hazard that could result in death, serious bodily injury, and/or property damage. Only qualified service people
should service this unit.
4.1 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.
4.2 Technical Description
The Quest CDG 174 uses a refrigeration system similar to an
air conditioner’s to remove heat and moisture from incoming
air, and to add heat to the air that is discharged (see Fig. 2).
Hot, high pressure refrigerant gas is routed from the
compressor to the condenser coil (see Figure 2). 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 capillary tubing
which cause the refrigerant pressure and temperature to drop.
It next enters the evaporator coil where it absorbs heat from
the incoming air and evaporates.
Figure 2: Refrigeration system of Quest
