Johnson Controls R-410A installation manual Section III Unit Installation, Limitations, Location

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835964-UIM-A-0112

LIMITATIONS

The unit should be installed in accordance with all National, State and Local Safety Codes and the limitations listed below:

1.Limitations for the indoor unit, coil, and appropriate accessories must also be observed.

2.The outdoor unit must not be installed with any duct work in the air stream. The outdoor fan is the propeller type and is not designed to operate against any additional external static pressure.

3.The maximum and minimum conditions for operation must be observed to ensure a system that will give maximum performance with minimum service.

TABLE 1: Application Limitations

Ambient Air Temperature

Air Temperature on

on Outdoor Coil

Indoor Coil

 

 

 

 

Min. DB

Max. DB

Min. WB

Max. WB

50°F

115°F

57°F

72°F

4.The unit should not be operated at outdoor temperatures below 50°F without an approved low ambient operation accessory kit installed.

5.The maximum allowable line length for this product is 75 feet.

SECTION III: UNIT INSTALLATION

LOCATION

Before starting the installation, select and check the suitability of the location for both the indoor and outdoor unit. Observe all limitations and clearance requirements.

The outdoor unit must have sufficient clearance for air entrance to the condenser coil, air discharge, and service access. See Figure 1.

NOTICE

For multiple unit installations, units must be spaced a minimum of 18” (46 cm) apart (coil face to coil face).

If the unit is to be installed on a hot sun exposed roof or a black-topped ground area, the unit should be raised sufficiently above the roof or ground to avoid taking the accumulated layer of hot air into the outdoor unit.

Provide an adequate structural support.

ADD-ON REPLACEMENT/RETROFIT

When this unit is being used as a replacement for an R-410A unit, it is required that the outdoor unit, indoor coil, and metering device all be replaced. The following steps should be performed in order to insure proper system operation and performance. Line-set change out is also recommended.

1.Change-out of the indoor coil to an approved R-410A coil/ con- densing unit combination with the appropriate metering device.

2.Change-out of the line-set when replacing an R-22 unit with an R410-A unit is highly recommended to reduce cross-contamina- tion of oils and refrigerants.

3.If change-out of the line set is not practical, then the following pre- cautions should be taken.

•Inspect the line set for kinks, sharp bends, or other restrictions, and for corrosion.

•Determine if there are any low spots which might be serving as oil traps.

•Flush the line set with a commercially available flush kit to remove as much of the existing oil and contaminants as possible.

•Install a suction line filter-drier to trap any remaining contami- nants, and remove after 50 hours of operation.

4.If the outdoor unit is being replaced due to a compressor burnout, then installation of a 100% activated alumina suction-line filter drier in the suction-line is required, in addition to the factory installed liquid-line drier. Operate the system for 10 hours. Monitor the suction drier pressure drop. If the pressure drop exceeds 3 psig, replace both the suction-line and liquid-line driers. After a total of 10 hours run time where the suction-line pressure drop has not exceeded 3 psig, replace the liquid line drier, and remove the suction-line drier. Never leave a suction-line drier in the system longer than 50 hours of run time.

 

MINIMUM 18” SERVICE

 

60” OVERHEAD

ACCESS CLEARANCE

THERMOSTAT

ON ONE SIDE

CLEARANCE

 

 

 

 

WEATHERPROOF

 

 

DISCONNECT

 

 

SWITCH

 

 

 

NEC CLASS 1 WIRING

6” CLEARANCE

 

TO FURNACE OR

AROUND PERIMETER

 

AIR HANDLER

 

 

TERMINAL BLOCK

 

 

NEC CLASS 2 WIRING

 

 

TO INDOOR COIL

NOTE:

 

 

ALL OUTDOOR WIRING

CONTROL

 

MUST BE WEATHERPROOF.

 

ACCESS

SEAL OPENING(S) WITH

 

 

PANEL

PERMAGUM OR EQUIVALENT

FIGURE 1: Typical Installation

2

Johnson Controls Unitary Products

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Contents List of Tables Section II SafetyList of Figures Section I GeneralLimitations Section III Unit InstallationADD-ON REPLACEMENT/RETROFIT LocationPrecautions During Line Installation Ground InstallationRoof Installation Liquid Line FILTER-DRIERPrecautions During Brazing of Lines Precautions During Brazing Service ValveSection VI Evacuation Section IV Orifice InstallationSection V TXV Installation Subcooling Charging Method TXV Indoor Section VII System ChargeSuperheat Charging Method Piston Indoor General Information & Grounding Field Connections Power WiringSection Viii Electrical Connections Field Connections Control Wiring Power WiringID Models AC 1AThermostat PSC Single Stage AIR Handler AIR ConditionerAC 1B PSC Single Stage AIR AIR Handler ConditionerAC 5D Single Stage PSC AIR Furnace ConditionerSingle Stage AIR Conditioner AC 5ESingle Stage PSC Furnace Subcooling Charge Table is on the Unit Rating Plate MaintenanceSection IX Instructing the Owner Section X Wiring Diagram 412217 Johnson Controls Unitary Products York Drive Norman, OK
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R-410A specifications

Johnson Controls R-410A is a widely recognized refrigerant in the HVAC industry, primarily used in air conditioning and heat pump applications. Known for its environmental benefits and efficiency, R-410A has risen to prominence as a reliable replacement for older refrigerants such as R-22, which are being phased out due to their harmful impact on the ozone layer.

One of the standout features of R-410A is its low impact on global warming potential, making it an environmentally-friendly choice. It is composed of a mixture of hydrofluorocarbons (HFCs), specifically difluoromethane (R-32) and pentafluoroethane (R-125). This blend allows for efficient heat transfer while minimizing harmful emissions, addressing the growing concerns over climate change.

Johnson Controls emphasizes the efficiency of R-410A systems, which can provide a highly effective cooling performance. They are designed to operate at higher pressures compared to R-22, allowing for more efficient heat exchange and better overall system performance. This results in greater energy efficiency ratings, contributing to lower electricity bills for consumers.

In terms of technology, R-410A systems often feature advanced compressor designs and enhanced coil configurations, which optimize the system’s performance. Johnson Controls integrates state-of-the-art variable speed technologies and smart controls that enhance responsiveness and adaptability to changing environmental conditions. These innovations not only improve thermal comfort but also reduce energy consumption, leading to a smaller carbon footprint.

Another significant characteristic of R-410A is its compatibility with various lubricants, which is crucial for maintaining system performance and longevity. Johnson Controls often utilizes specially formulated lubricants that work optimally with R-410A, ensuring reliable operation and reducing the risk of issues related to lubrication.

In summary, Johnson Controls R-410A is an important refrigerant characterized by its efficient, environmentally friendly properties and advanced technologies. Its application in modern HVAC systems provides users with excellent performance, substantial energy savings, and an effective solution for climate-conscious cooling. As the industry continues to evolve, R-410A remains a central player in the push toward more sustainable and efficient heating and cooling solutions.
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