8
TO/FROM
SECONDARY ZONE
SUPPLY DUCT
RETURN DUCT
NORMALLY CLOSED DAMPER
NORMALLY CLOSED DAMPER
SUPPLY TO
PRIMARY ZONE
RETURN FROM
PRIMARY ZONE
NORMALLY
OPEN
DAMPER
NORMALLY
OPEN
DAMPER
HCWHD4-080
0.4” w.c. MAX
HCWHD4-100
0.6” w.c. MAX
HCWHD4-130
0.7” w.c. MAX
6 ft
MIN
TO/FROM
PRIMARY ZONE
SUPPLY DUCT
RETURN
DUCT
NORMALLY OPEN DAMPER
NORMALLY OPEN DAMPER
SUPPLY TO
SECONDARY ZONE
RETURN FROM
SECONDARY ZONE
NORMALLY
CLOSED
DAMPERS
90-1875
90-1895
In this installation the dehumidifier controls the humidity in
two separate zones, a Primary and Secondary Zone. The
dehumidifier will dehumidify the Primary Zone as the first
priority, and will switch to the Secondary Zone after the
dehumidification needs of the Primary Zone have been
satisfied.
NOTE: Dehumidifier controls will not work
with iHarmony
®
Zoning Systems.
IMPORTANT: Normally Closed dampers must be
installed in the ducts serving the Primary Zone and
Normally Open dampers installed in the ducts serving
the Secondary Zone.
Required Components
10" Duct and Fittings
Grilles with 10" Duct Collars
Drain Line
Y6451 Zoning Kit: Includes 2 – Y6483 Normally Closed
Dampers, 2 – X4211 Normally Open Dampers and
Y7128 24VAC (40VA) transformer
Ducting for Two Zone Installations (This is not iHarmony
®
Zoning System)
Figure 17. Whole Home as Primary Zone
Figure 18. Whole Home as Secondary Zone
NOTE: In this configuration,
the ducting must be return to
supply. Make sure the external
static pressure does not
exceed the maximums shown
and disable dehumidification
during active air conditioning.
See DEH W/AC on page 13.
