Whole-Home installation (continued)

DIP SWITCH CONFIGURATION

HVAC FAN ON: Activating the HVAC fan during dehumidification is recommended because it offers better circulation and balancing of indoor air conditions.. Running the HVAC fan during dehumidification does not affect moisture removal efficiency.. If the switch is put in the HVAC FAN OFF position, air is pulled through the unit, dehumidified, and circulated solely by the dehumidifier blower..

CYCLE PERIOD: This determines how frequently the dehumidifier will sample the air to check the humidity level.. Set to 1 hour and adjust as needed..

For Ventilation switch settings, see VENTILATION section beginning on page 12.

For Local/External switch setting, see THIRD-PARTY CONTROL on page 17.

Figure 13 – Whole-Home DIP Switch Settings

SYSTEM SETUP

LOCAL

1

 

ON

EXTERNAL

 

HVAC FAN OFF

2

 

HVAC FAN ON

 

 

WHL HOUSE

3

 

 

CONVERTIBLE

VENT-AUTO

4

 

 

VENT-TIMED

CYCLE PERIOD

1

 

 

ON

30 MIN.

 

 

2

 

 

1 HOUR

 

 

 

3

 

 

 

2 HOUR

4

 

 

 

3 HOUR

 

 

 

 

 

90-1538

SEQUENCE OF OPERATION

Sampling will occur once within the Cycle Period. Sampling is initiated with the first HVAC fan (Gs) call or at the end of the Cycle Period if a HVAC fan call is not received within the Cycle Period.. At the onset of sampling, the dehumidifier damper output turns on, the dehumidifier blower turns on, and the green Status LED flashes..

After three minutes, the dew point of the incoming air is measured and compared to the set point on the control knob. If the dew point of the incoming air is above the set point, the compressor turns on and the green Status LED switches to solid illumination.. If the dew point is below the set point, the dehumidifier damper output turns off and the dehumidifier blower turns off along with the green Status LED..

The dew point of the incoming air is continuously monitored during compressor operation. When the dew point of the incoming air falls below the set point on the control knob, the dehumidifier damper output turns off and the dehumidifier compressor and blower turn off along with the green Status LED..

SPOT installation

In this installation the dehumidifier is not ducted to the HVAC system and is used to dehumidify a specific area.. This installation is typically used in basements or crawl spaces.. The dehumidifier can remain non-ducted, however, to achieve specified performance it is recommended that the dehumidifier be ducted to the area requiring dehumidification.. When ducted, grilles should be installed on the inlet and outlet to increase the pressure drop across the unit.. 10 feet is the recommended distance between inlet and outlet grilles..

Required Components

Duct Work

Grilles with 8” duct collars

Optional Components

Condensate Pan & Normally Closed Float Switch

Model 70 Living Space Control

Third-Party Control

8

Page 8
Image 8
Aprilaire 1770A Spot installation, DIP Switch Configuration, Sequence of Operation, Duct Work Grilles with 8 duct collars

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.