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

8
CENTRAL / ZONED (CONVERTIBLE) INSTALLATION AND OPERATION
The Aprilaire central dehumidifier can be utilized not only for whole home humidity and comfort control, but also for addressing
specific zones or spaces that are high priority for humidity control. In this application, the central dehumidifier will control
humidity in the specific zone independently, as the higher priority, and then switch to the whole home when the HVAC equipment
is on/operating. Do Not use a Model 70 Living Space Control in this application.
NOTE: 1. 4522 Basement Kit includes 2 – 6508 N.C. Dampers, 2 – 6608 N.O. Dampers and a 24 VAC Transformer.
2. Running Constant fan on will prevent proper function in this mode.
2 – 6508 Normally Closed Power Open Damper
2 – 6608 Normally Open Power Closed Damper
Duct Work
24 VAC Transformer (40 VA minimum)
Thermostat Wire
REQUIRED COMPONENTS OPTIONAL COMPONENTS
6506 Ventilation Damper
24 VAC Transformer (10 VA minimum) for Ventilation Damper
8052 Outdoor Temperature Sensor
Normally Closed Condensate Overflow Safety Switch
6“ MIN
RETURN
AIRFLOW
6“ MIN
AIR CLEANERCOOLING COIL
HVAC UNIT
APRILAIRE
CENTRAL
DEHUMIDIFIER
N.O. DAMPER
SUPPLY
AIRFLOW
N.O. DAMPER
N.C. DAMPER
N.C. DAMPER
RETURN FROM
UNCONDITIONED
SPACE
SUPPLY TO
UNCONDITIONED
SPACE
OPTIONAL
N.C. DAMPER
OPTIONAL
OUTDOOR AIR
INTAKE
FIGURE 9 – DUCTING
90-947