ATTIC DUCTING
CONDENSATE PAN
1750A – 8" DIA. INSULATED DUCT
1770A – 10" DIA. INSULATED DUCT
BOTH SIDES
FILTER
AIR HANDLER
6" MIN.
6 FT. MIN.
PLENUM BOX OR Y-FITTING
fIGURE 11 – Single Zone – Ducted to HVAC System,
Preferred Attic Installation
90-1618-2
1750A – 8" DIA. INSULATED DUCT
1770A – 10" DIA. INSULATED DUCT
BOTH SIDES
CONDENSATE PAN
FILTER
24"
MIN.
PLENUM BOX
6" MIN. 6" MIN.
0.4" w.c. MAX.
PLENUM
AIR HANDLER
fIGURE 12 – Single Zone – Ducted to HVAC System,
Alternate Attic Installation
90-1618-4
The
Preferred Installation
(see
figure 11
) ensures warm, dehumidified air is thoroughly mixed with HVAC system air before being discharged
into the living space . If adequate space exists between the supply plenum and the first branch, allowing for proper mixing with the HVAC system
air, the dehumidifier discharge may be ducted to the supply side . The
Alternate Installation
(see
figure 12
) minimizes re-evaporation of
moisture off the cooling coil .
Attic Installation Notes:
• The dehumidifier must be installed in a secondary condensate pan
with a float switch .
• A Model 76 Control mounted in the living space is recommended
(see
figure 13
) .
• Vibration isolators placed under the dehumidifier feet are
recommended when the dehumidifier is installed on ceiling joists .
Wiring & Sequence of Operation Notes:
• If wiring to a Model 76 Control, see MODEL 76 EXTERNAL
CONTROL section on page 19 .
• If wiring to a Model 8910 Home Comfort Control
™
or other
Third-Party Control, see MODEL 8910 HOME COMFORT CONTROL
™
OR THIRD-PARTY CONTROL section on page 21 .
90-1618-8
DEHUMIDIFIER
4-WIRE CABLE
(18-22 AWG)
INSTALL A
MODEL 76
CONTROL WHEN
DEHUMIDIFIER IS
INSTALLED IN ATTIC
fIGURE 13 – Attic Installation with External Control
Dip Switch Note:
HVAC fan must be activated during dehumidification .
SINGlE ZONE – DUCTED TO HVAC SySTEM INSTAllATION
(CONTINUED)
8
