Whole Building / Localized Convertible - Aprilaire 1720 Installation,Safety & Maintenance Manual

WHOLE BUILDING / LOCALIZED CONVERTIBLE INSTALLATION AND OPERATION
In this configuration the dehumidifier will automatically switch between whole-building dehumidification when the HVAC
equipment is on, and localized dehumidification when the equipment is off. This installation is used to dehumidify a whole
building and a separate unconditioned space.
REQUIRED COMPONENTS
2 – 6508 Normally Closed Power Open Damper
2 – 6608 Normally Open Power Closed Damper
Duct Work
24 VAC Transformer (40 VA minimum)
Thermostat Wire
FIGURE 9 – DUCTING
6" MIN
SUPPLY
AIRFLOW
SUPPLY TO
UNCONDITIONED
SPACE
N.O. DAMPER
8
COOLING COIL AIR CLEANER
HVAC UNIT
N.C. DAMPER
1720
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
3' MIN
N.C. DAMPER
N.O. DAMPER
OPTIONAL
OUTDOOR AIR INTAKE
OPTIONAL
N.C. DAMPER
RETURN
AIRFLOW
RETURN FROM
UNCONDITIONED
SPACE
90-947