Aprilaire 1700 Safety And Installation Instructions Manual page 6

WHOLE-HOUSE, WITH LOCALIZED OPTION FOR UNCONDITIONED SPACE
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.
6
FIGURE 6 – DEHUMIDIFIER OPERATING AS WHOLE-HOUSE SYSTEM
FIGURE 7 – DEHUMIDIFIER AUTOMATICALLY CONVERTED TO LOCALIZED SYSTEM
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