505430-BTG-A-0309

• Must cycle to allow cooling operation down to 40°F.

Refrigerant Piping

Solid core filter-drier(s) ship loose for field installation.

Liquid and suction line service valves with gauge ports.

Suction and discharge line service ports accessible from unit. Ports capped for leak prevention.

Liquid line magnetic check valves

Holding charge of R410A refrigerant.

Electrical Requirements

Single-point connection electrical power.

Nominal unit electrical characteristics shall be _____ v, 3-ph, 60 Hz. The unit shall be capable of satisfactory operation within voltage limits of ____ v to _____ v.

Condenser fan motors and secondary of transformers shall be grounded.

Unit Controls

All 24-volt control circuit, powered by a 24 volt transformer(s) and protected by a resettable breaker.

Conventional thermostat must provide operation for both condensing units and heat pumps without an “O” output from the thermostat.

Low voltage terminal strip for simple hook-up.

Compressor motor protection shuts down unit for motor over-current, over-temperature or low voltage conditions.

Safety lockouts provide reset capability at the space thermostat or base unit should any of the following standard safety devices trip and shut off compressor:

a.Loss-of-charge/Low-pressure switch.

b.High-pressure switch.

c.Control board diagnostics and fault code display.

d.Safety lockouts send a 24 volt signal to the control board's "X" terminal, allowing notification to the user via the thermostat fault light (if present).

e.Control board shall retain last 5 fault codes in non- volatile memory, which will not be lost in the event of a power loss. An LED (light-emitting diode) indicator flashes a fault code that indicates which safety switch has tripped.

Non-fused Disconnect Switch

Factory-installed, internally mounted.

Accessible from outside the unit.

NEC and UL approved non-fused switch.

Provides power off lockout capability.

Convenience Outlet

Factory-installed, internally mounted.

Accessible from outside the unit.

115V, 15 amp GFI receptacle with independent fuse protection.

Required voltage provided by factory-installed step- down transformer or field supplied 115v circuit.

Low-ambient Head Pressure Control

Standard operation down to 40 °F without a low ambient kit.

Operation down to 0°F with a field-installed low ambient kit accessory. The controller modulates the fan motor speed in response to liquid line temperature or pressure.

Coil Guard

Factory or field installed decorative grille shall be placed on the units to protect condenser coil after installation.

Hail Guard Package

Field installed hail guard package shall protect coils against damage from hail and other flying debris.

Phenolic Coated Condenser Coils

Special phenolic coating available as a factory option on both outdoor and indoor coils.

Each Unit Shall Be:

Covered by a 1-year limited parts warranty on the complete unit and 5-year on compressor(s).

In current production with published literature available to check performance, limitations, specifications, power requirements, dimensions, operation and appearance.

Indoor unit shall be equipped with a V-belt drive option that will permit the blower RPM to be adjusted to meet the CFM requirements of the air delivery system. (Refer to Technical Guide for Airflow Capabilities.)

Each Unit Enclosure Shall Have:

Exterior panels of 18 gauge steel, finished with baked enamel to provide a long lasting quality appearance

Removable panels to provide easy access to the internal components for maintenance and service on condensing units, heat pumps and air handlers

AIr handling units must have a filter rack that accepts both 2” and 4” filters.

The dimensions of each unit shall not exceed those specified in the manufacture’s literature.

Johnson Controls Unitary Products

7

Page 7
Image 7
Johnson Controls R-410A manual Refrigerant Piping, Electrical Requirements, Unit Controls, Non-fused Disconnect Switch

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.