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This installation is used to
dehumidify a whole house and
also a separate unconditioned
space like an unfinished
basement or an area where
circulation of air from that
location throughout the house
is undesirable. Four dampers
are installed.
In whole house mode
(Figure 6), whenever the
HVAC blower turns on, air is
pulled from the return duct,
dehumidified, and returned to
the HVAC system downstream
of the cooling coil in the main
supply duct.
In localized mode (Figure 7)
the four-damper configuration
cuts out the HVAC ducting and
opens the ducting to the
unconditioned space, pulling
and returning air from this area
alone. This keeps the living
space and unconditioned
spaces separate.
WHOLE-HOUSE, WITH LOCALIZED OPTION FOR UNCONDITIONED SPACE
VENTILATION (OUTSIDE AIR)
CONTROL DAMPER (OPTIONAL)
UNCONDITIONED SPACE
DEHUMIDIFIER
CONDENSATE HOSE
(TO COMMON DRAIN)
DEHUMIDIFIER CONTROL
WITH SET POINT KNOB
115VAC
SUPPLY DUCT
RETURN DUCT
NORMALLY-CLOSED POWER DAMPER:
OPEN
“T” FITTING
NORMALLY-OPEN POWER DAMPER:
CLOSED
INLET GRILL
OUTLET GRILL
“T” FITTING
UNCONDITIONED SPACE
VENTILATION (OUTSIDE AIR)
CONTROL DAMPER (OPTIONAL)
NORMALLY-OPEN POWER DAMPER:
OPEN
NORMALLY-CLOSED POWER DAMPER:
CLOSED
RETURN DUCT
SUPPLY DUCT
115VAC
DEHUMIDIFIER CONTROL
W/ SET POINT KNOB
CONDENSATE HOSE
(TO COMMON DRAIN)
DEHUMIDIFIER
INLET GRILL
OUTLET GRILL
FIGURE 6 – DEHUMIDIFIER OPERATING AS WHOLE-HOUSE SYSTEM
FIGURE 7 – DEHUMIDIFIER AUTOMATICALLY CONVERTED TO LOCALIZED SYSTEM
90-779
90-779