Air Filter - Aprilaire 1700 Safety And Installation Instructions Manual

After determining the manner or type of dehumidification system configuration that will be used, and if the duct system
equivalent length is acceptable, please use the following criteria and guidelines for installing the ductwork.
• If needed, use Aprilaire ®
6508 on the dehumidifier outlet. The recommended
location for this damper is at least 3 feet downstream of
the outlet collar. Do not use conventional back draft
dampers, the pressure drop of these dampers is too high.
• The outlet from the dehumidifier to the HVAC supply duct
must be located at least 6" downstream of the cooling
coil.
• If the dehumidifier inlet is drawing air from the HVAC
return duct, it must be located at least 6" upstream of the
HVAC system air cleaner. This will prevent any trapped
particulates from being drawn into the dehumidifier.
• If UV Germicidal lamps are installed in the HVAC System,
use appropriate methods to protect the flexible duct from
the UV light.
• At the time of install with a new air filter, the airflow
rate through the dehumidifier must exceed 210 cfm.
If it does not the dehumidifier must not be installed.

AIR FILTER

Under normal circumstances, the air filter in the dehumidifier should be cleaned or replaced once a year. A clean filter is
necessary to prevent damage to the dehumidifier and to allow the dehumidifier to function at full capacity. To remove the
filter, first unplug or disconnect power to the dehumidifier, then remove the air filter via the filter access panel on the side
of the dehumidifier. To clean, flush with warm water and detergent solution. After a clean or new filter (Model 4510) is
reinstalled, replace the access panel and reconnect power to the dehumidifier.
Normally-Closed Damper Model • If air noise is a problem, install at least 5 feet of
acoustical flexible duct on the outlet of the dehumidifier.
• If inlet or exhaust grilles are used they must be properly
sized so as not to restrict airflow. They should be sized
for an airflow rate of 275 cfm.
• If a ventilation duct is used, locate the ventilation air
inlet at least 3' upstream from the duct that feeds the
dehumidifier inlet.
• The blower in the dehumidifier has a shutoff pressure of
1.2" w.c. Therefore, with added safety factor ductwork
must be able to withstand pressure of 2" w.c.
• If tees are used in the ductwork, install them in such a
manner that reduces system pressure drop.
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