Heat Pump Installation, Unit Under the Home

HEAT PUMP INSTALLATION

Locating the Heat pump

•Select a solid, level position, preferably on a concrete slab, slightly above the grade level, and parallel to the home. DO NOT PLACE

UNIT UNDER THE HOME.

•The hot condenser air must be discharged up and away from the home, and if possible, in a direction with the prevailing wind.

•Do not place the unit in a conﬁ ned space.

•If practical, place the heat pump and its ducts in an area where they will be shaded from the afternoon sun, when the heat load is greatest.

•If possible, select a site for the unit that is as close as possible to the proposed return grille location.

•The length of the supply and return ducts should be kept to a minimum with no sharp radius bends.

Unpacking the Unit

It is recommended that the unit be unpacked at the installation site to minimize damage due to handling.

CAUTION:

Do not tip the unit on its side. Oil may enter the compressor cylinders and cause starting trouble. If unit has been set on its side, restore to upright position and do not run for several hours.Then run unit for a few seconds. Do this three or four times with ﬁve minutes between runs.

1.Remove the bands from around the unit.

2.Unfold the top and bottom cap ﬂ anges.

3.Carefully remove the top cap and tube.

Minimum Clearances

Minimum clearances MUST be maintained from adjacent structures to provide room for proper servicing and air circulation. See Figure 2. DO NOT install unit in a conﬁned or recessed area that will allow discharge air from the unit to re-circulate into the condenser air inlet, through the coil.

Service Access Clearance:
Blower access panel side	24”
Electrical compartment access panel side ...	12”
Clearance between overhang and
top of unit	72”

Clearance around condenser coil area to

wall or shrubs (excludes duct panel side) .. 12”

6 ft.

24"

12"

Figure 2. Minimum Unit Clearances

Clearances to Combustible Materials: Combustible Base (Wood or Class A, B, or C

roof Covering material)	0”
Supply and Return Air Ducts	0”
Duct Connection side	0”

Duct Requirements

The supply duct system, including the number and type of registers, will have much more effect on the performance of an air conditioning system then any other factor. The duct must be sufﬁciently large to conduct an adequate amount of air to each register.

CONDENSATE DRAINAGE

A 3/4” condensate ﬁ tting extends out of the side of the unit (Figure 3). The drain trap, shipped in the electrical compartment, must be installed to prevent water from collecting inside the unit.

1.Thread the elbow provided with the unit into the drain connection until hand tight.

2.Connect the condensate tubing onto the ﬁtting, forming a trap near the drain connection.

3.Route the condensate tube from the trap to a suitable drain. NOTE: For proper drainage, make sure the trap is level to the ground and tubing outlet is below trap level.

Elbow

P-Trap

Figure 3. Drain Trap

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.