Aprilaire 1750A - Central;Zoned (Convertible) Installation and Operation; Required Components; Optional Components

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
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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
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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.
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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)
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