Solutions HCWHD3-070 - Y6456 Control and Wiring; Y6456 External Control Wiring; Y6456 Crawl Space;Sealed Attic Control

+-AB ODT
SensorRemote
Gh Rf Cf Gs YW
HVAC EQUIP.
Y6456 CONTROL
FLOAT
Switch
DHDH
VENT DEH
Dampers
NC NO
NO/NC SWITCH
DH
DH
R/+
C/-
B
A
90-1862
+ -AB ODT
SensorRemote
Gh Rf Cf Gs YW
HVAC EQUIP.
DH
DH
R/+
C/-
B
A
Y6456 CONTROL
90-1860
NOTE: Use 18-22 AWG wire for control
wiring.
EXTERNAL CONTROL
Used as an external control, the Y6456
is mounted in the space that is to be
dehumidied. When the dehumidier is
powered, the display on the dehumidier
control will show “EXTERNAL” to indicate
that an external control is being used.
External controls are recommended when
the dehumidier is installed in an attic and
is ducted to the HVAC system.
The Y6456 uses a normally open (NO),
dry contact (i.e. not a triac or other
semiconductor) relay to complete the
circuit between the DH terminals of the
dehumidier control. If using other controls
such as a thermostat with dehumidication
outputs, ensure the output is a dry contact
type and set the NO/NC switch on the
dehumidier control (see Figure 20) to
correspond with the control being used.
If an external control is used in a zoned
application, it must be located in the
Primary Zone (refer to TWO ZONE –
PRIMARY AND SECONDARY zoned
installation on page 15 for details).
NOTE: When using an external control,
there is a 3 minute delay at start up
or whenever power is cycled to the
dehumidier.
CRAWL SPACE/SEALED ATTIC
CONTROL
Used as crawl space or sealed attic control
(or wired remote control), the Y6456 is
mounted in the living space while the
dehumidier is located in the area to be
dehumidied. When the dehumidier is
powered, the display on the dehumidier
control will show “REMOTE” to indicate
that a wired remote control is being used.
The RH shown on the Y6456 is the RH
measured at the dehumidier.
Wired remote control is typically used for
crawl space or sealed attic applications, but
is also recommended when the dehumidier
and the space being dehumidified are
inconvenient or difcult for the homeowner
to access. Examples of this type of
application include basements that may
be inconvenient to access or storage areas.
Y6456 – External Control or Crawl Space/Sealed Attic Control and Wiring
Figure 20. Y6456 External Control Wiring
Figure 21. Y6456 Crawl Space/Sealed Attic (Wired Remote) Wiring
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