LOCATING AND INSTALLING THE

SUPPLY DAMPER(S)

When locating the supply damper(s), carefully check fl oor joists and frame members that could interfere with the installation of the damper or flexible duct.Ideally, the damper (Figure 6) should be located in the bottom of the main duct, forward of center of the home, at least three feet from the nearest register.The round supply opening in the slanted side of the damper should face the side of the home where the heat pump is located.

1.Locate the center of the heat duct by cutting a small hole in the fi berboard below the duct at the desired location.

2.Cut a hole approximately 3/4” larger than the damper opening in the fi berboard.

3.Cut a 9-1/8” x 13-1/8” hole in the duct and bend over all tabs fl at on the inside of the heat duct.

4.Insert the damper into the duct and bend over all tabs fl at on the inside of the heat duct.

5.Seal the opening between the fi berboard and damper or fl exible duct.

AUTOMATIC DAMPER IS CLOSED

WHEN HEAT PUMP IS OFF

Figure 6. Supply Damper

DUCTING SYSTEM

Air ducts should be installed in accordance with the standards of the National Fire Protection Association “Standard for Installation of Air Conditioning and Ventilation Systems” (NFPA 90A), “Standard for Installation of Residence Type Warm Air Heating and Air Conditioning Systems” (NFPA 90B), these instructions, and all applicable codes.

The supply duct system, including the number and type of registers, will have much more effect on the performance of the system than any other factor. The duct must be suffi ciently large to conduct an adequate amount of air to each register. See Table 1 or Figure 7.

The heat pump system will not cool or heat the home if air is lost to the outside through leaks in the duct system. Ducts that are collapsed or restricted by foreign objects will also prevent adequate air flow.

Item

Description

No.

 

112” x 20” Return Air

216” x 20” Air Filter

312” x 20” Grille

4Supply Damper

514” Diameter Flex Return Duct

612” Diameter Flex Supply Duct

712” x 12” x 12” “Y” Fitting

Table 1. Typical Applications

 

SINGLE DUCT APPLICATION

MULTIPLE DUCT APPLICATION

 

4

4

 

 

6

 

 

 

4

3

6

3

 

2

6

2

 

 

 

 

 

1

 

7

 

 

1

 

 

5

5

 

Figure 7. Single and Multiple Duct Applications

7

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Nordyne R-410A user manual Locating and Installing Supply Dampers, Typical Applications
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R-410A specifications

Nordyne R-410A is a widely recognized refrigerant used in modern air conditioning and heat pump systems, known for its efficiency and environmentally friendly attributes. As a hydrofluorocarbon (HFC) refrigerant, R-410A has become the preferred choice for many manufacturers seeking to meet stringent environmental regulations while providing superior cooling performance.

One of the main features of R-410A is its higher energy efficiency compared to older refrigerants like R-22. This efficiency is primarily attributed to its higher pressure capabilities, which allow for improved heat transfer and reduced energy consumption in residential and commercial systems. As energy costs continue to rise, the use of R-410A in HVAC systems offers a viable solution for reducing utility bills while maintaining optimal comfort levels.

R-410A is also non-ozone-depleting, which sets it apart from many traditional refrigerants. While older refrigerants have been phased out due to their potential harm to the ozone layer, R-410A presents a sustainable alternative that aligns with environmental goals. It features a zero ozone depletion potential (ODP), making it a responsible choice for installations concerned with ecological impact.

In terms of technology, R-410A works effectively in both air conditioning and heat pump systems, providing reliable cooling in hot conditions and heat in colder months. It is compatible with a variety of system designs and can excel in both residential and commercial applications. Moreover, the thermodynamic properties of R-410A ensure consistent and reliable performance, regardless of the external temperature fluctuations.

Another characteristic of R-410A is its ability to operate at lower temperatures, which enhances its versatility. This capability allows for the design of systems that can function efficiently in a wider range of climate conditions. As a result, HVAC technicians and contractors benefit from its reliability and performance, leading to less frequent maintenance and enhanced customer satisfaction.

Lastly, R-410A systems are equipped with advanced components that improve overall functionality. These systems often include variable-speed compressors, which optimize energy use based on cooling demand, and advanced refrigerant management technologies that ensure safe and efficient operation.

In conclusion, Nordyne R-410A stands out as a superior refrigerant due to its energy efficiency, environmental benefits, and adaptability across a range of HVAC applications. As the industry continues to innovate and shift toward sustainable solutions, R-410A remains at the forefront of refrigerant technology, ensuring homeowners and businesses alike enjoy efficient and eco-friendly cooling options.
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