Aprilaire 1750A Mechanical Installation, Duct Collars & Backflow Damper, Ductwork Recommendations

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MECHANICAL INSTALLATION

DUCT COLLARS & BACKFLOW DAMPER

The backflow damper installs on the outlet side of the dehumidifier, using features molded into the duct collar..

1.Remove the duct collars and backflow damper from the inner pack..

2.Place the backflow damper in the collar with the damper pivot shaft resting in the slot in the collar (see Figure 3)..

3.Position the collar and damper with damper pivot shaft up and install on the outlet panel using four #8 x 1” field supplied sheet metal screws (see Figure 4).. The collar should sit flush on the outlet panel and secure the backflow damper..

4.Verify that the damper swings freely by lifting up on the damper and allowing it to swing closed..

5.Make sure there are no bends in the ductwork coming off the outlet for a minimum of 4”.. This will ensure that the ductwork will not interfere with backflow damper function (see Figure 5)..

Figure 3 – Install Damper in Collar

90-1503

Figure 4 – Install Collar with Damper on Outlet

CAUTION

Only install

damper on outlet.

Dehumidifier will

not function if

damper is installed

on inlet.

90-1503

Figure 5 – Minimum Ductwork Bend Distance

4" MIN.

INLET

OUTLET

BACKFLOW

DAMPER

90-1503

DUCTWORK RECOMMENDATIONS

Table 2 – Design Airflows

 

1750A

1770A

 

 

 

CFM

275

500

 

 

 

External Static Pressure

0..6”w..c..

0..9”w..c..

 

 

 

Amount of 8” Ducting

70 ft..

100 ft..

 

 

 

Notes:

1..Duct length totals include both inlet and outlet sides..

2..Elbows, turns, and the static pressure of the HVAC equipment will affect the airflow through the dehumidifier..

3..Static Pressure Maximums: 1750A – 0..8”w..c..

1770A – 1..5”w..c..

4.. Ductwork to be installed in accordance with SMACNA Standards..

When ducted to the HVAC supply, the outlet from the dehumidifier must be located at least 6” downstream of the cooling coil to prevent outlet air from pulling moisture from the coil..

To minimize sound from air movement and vibration, install 5 feet minimum of flex duct on the inlet and outlet of the dehumidifier..

Use the least amount of ductwork possible. UL approved, insulated duct is recommended for all connections..

If ventilating, use insulated duct on the dehumidifier inlet duct.

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Contents Table of Contents Safety InstructionsWhole-Home, see Spot, see Convertible, see OverviewUnpacking and Contents SpecificationsPower Outlet within 8 ft.. of unit Install Unit Indoors Do not expose to elementsLocation Considerations Location NotesDuct Collars & Backflow Damper Mechanical InstallationDuctwork Recommendations Design AirflowsDrain Mechanical InstallationWhole-Home installation Attic Installation Note Basement Ducting & WiringAttic Ducting & Wiring DIP Switch Configuration Spot installationSequence of Operation Duct Work Grilles with 8 duct collarsWiring Notes Ducting & WiringOptional Component Convertible installationCondensate Pan & Normally Closed Float Switch OFF Test Ventilation oR Air Cycling Determine Cycle Time Determine Fresh AIR Delivery RateCFM Delivered Outdoor Temperature Sensor Installation Switch NotesVent-Auto Vent-Timed, Hvac Initiates VentilationVent-Timed, Dehumidifier Initiates Ventilation Model 70 living space control Wiring & DIP Switch ConfigurationLocal Whole-HomeExternal Third-party controlSystem Checkout Adjusting Dehumidifier SET PointDehumidification VentilationLED Codes TroubleshootingGreen LED Codes Red LED CodesTroubleshooting Guide Troubleshooting
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1770A, 1750A specifications

The Aprilaire 1750A and 1770A are advanced dehumidifiers designed to enhance indoor air quality by effectively managing humidity levels in residential settings. These models stand out for their efficiency and durability, making them popular choices for homeowners seeking to create a comfortable living environment.

One of the main features of the Aprilaire 1750A is its ability to remove up to 70 pints of moisture per day, while the slightly larger 1770A can handle up to 90 pints. This powerful moisture removal capacity makes both models particularly suitable for larger homes or spaces prone to high humidity, such as basements and attics.

In terms of technology, both units utilize a robust and energy-efficient compressor system that operates quietly, ensuring minimal disruption during their operation. The dehumidifiers are designed with an innovative control system that allows for humidity settings to be easily adjusted, providing users with full control over their indoor environment. This intelligence enables the units to efficiently operate only when necessary, resulting in significant energy savings.

The Aprilaire 1750A and 1770A feature an automatic drain option, allowing for continuous operation without the need for frequent manual emptying of the water reservoir. This functionality is particularly beneficial in high-humidity areas where regular monitoring may be cumbersome. Homeowners can also appreciate the unit’s easy-to-clean filter, which helps maintain efficient performance and prolongs the life of the dehumidifier.

Both models come equipped with an integrated humidity sensor, which actively monitors the humidity levels in the home. This allows the units to adjust their operation automatically based on the current conditions, optimizing moisture removal while maintaining energy efficiency. The sleek and compact design of the Aprilaire models ensures they can fit unobtrusively into most spaces, while durable construction materials guarantee long-lasting performance.

Moreover, the Aprilaire 1750A and 1770A models are backed by a comprehensive warranty, offering peace of mind to homeowners investing in their comfort and health. Overall, these dehumidifiers are excellent choices for anyone looking to improve air quality and create a healthier, more comfortable indoor atmosphere. Through their advanced features, reliable performance, and user-friendly design, the Aprilaire 1750A and 1770A stand out as leaders in the dehumidification market.