Goodman FTXNG-A Series Inverter Split Unit Air Conditioner Engineering Data

Introduction

This document provides engineering data for the Goodman FTXNG-A Series Inverter Split Unit Air Conditioner with Heatpump functionality. The series includes models FTXNG09A, FTXNG12A, and FTXNG18A, designed for wall-mounted installation and operating on a 208/230V, 60Hz power supply.

Model Name and Power Supply

Nomenclature

The model numbers for the FTXNG-A series are structured to indicate specific features. Below is a breakdown of the nomenclature for both indoor and outdoor units:

Indoor Unit Nomenclature

*Capacity value under Nomenclature is an indication. Please refer to Specifications Data for exact capacity value.

Outdoor Unit Nomenclature

Functions

The FTXNG-A series offers a range of functions for comfortable and efficient operation:

Note: •: Available, -: Not Available, •*: Optional

Specifications

The following tables detail the technical specifications for the Goodman FTXNG-A series air conditioners, covering cooling and heating performance, dimensions, electrical characteristics, and more. The specifications are provided for the FTXNG09A/RXNG09A, FTXNG12A/RXNG12A, and FTXNG18A/RXNG18A models.

General Specifications

Indoor Unit Specifications (Example: FTXNG09A)

Outdoor Unit Specifications (Example: RXNG09A)

Note: Capacities are based on specific test conditions (e.g., Indoor 80°FDB/67°FWB for cooling, 70°FDB for heating; Outdoor 95°FDB for cooling, 47°FDB/43°FWB for heating).

Dimensions

Detailed dimensional drawings are provided for both indoor and outdoor units to aid in installation planning.

Indoor Unit Dimensions

Diagrams show the front, rear, left, right, and bottom views of the indoor units FTXNG09/12A and FTXNG18A, with key dimensions indicated in inches and millimeters. These diagrams are for illustrative purposes only.

Outdoor Unit Dimensions

Diagrams show the front, rear, left, right, and bottom views of the outdoor units RXNG09/12A and RXNG18A, including details on mounting holes, service valves, and clearance requirements for installation. Key dimensions are provided in inches and millimeters. These diagrams are for illustrative purposes only.

Wiring Diagrams

Electrical wiring diagrams are provided for the indoor and outdoor units, illustrating the connections for power supply, motors, sensors, and control boards.

Indoor Unit Wiring Diagram (Model: FTXNG-A)

This diagram shows the internal wiring of the indoor unit, including connections for the fan motor (MF), air swing motor (MS), thermistors (TH1, TH2), display board, and optional Wi-Fi adapter or wired accessories.

Outdoor Unit Wiring Diagrams

Separate diagrams are provided for the outdoor units RXNG09/12A and RXNG18A. These illustrate the connections for the compressor motor (MC), fan motor (MF), electronic expansion valve (EXV), four-way valve (4WV), fuses, terminal blocks, and sensors (outdoor air, heat exchanger, discharge). Field wiring connections are also indicated.

Piping Diagrams

Refrigerant piping diagrams illustrate the flow of refrigerant for cooling and heating modes for both indoor and outdoor units.

Indoor Unit Piping Diagrams

Diagrams for FTXNG09A, FTXNG12A, and FTXNG18A show the indoor heat exchanger, distributor, fan motor, and thermistor connections, along with field piping connections (1/4" and 3/8" copper tubing).

Outdoor Unit Piping Diagrams

Diagrams for RXNG09A, RXNG12A, and RXNG18A illustrate the outdoor heat exchanger, propeller fan, compressor, four-way valve, electronic expansion valve, accumulator, strainers, mufflers, and thermistors. Field piping connections are also indicated.

Capacity Tables

Extensive tables provide detailed cooling and heating capacity data for the FTXNG-A series models under various operating conditions. These tables list Total Capacity (TC), Sensible Heat Capacity (SHC), and Power Input (PI) in kW (or kBtu/h) for different combinations of indoor and outdoor temperatures (both Celsius and Fahrenheit). Interpolation is required to determine values for conditions not explicitly listed.

Key Information Presented in Capacity Tables:

• Cooling Capacities: Provided for indoor temperatures ranging from 14°C to 32°C (57.2°F to 89.6°F) and outdoor temperatures from 10°C to 46°C (50°F to 115°F).
• Heating Capacities: Provided for indoor temperatures ranging from 15°C to 27°C (59°F to 80.6°F) and outdoor temperatures from -15°C to 18°C (5°F to 64.4°F).
• Units: Capacity in kW or kBtu/h, Power Input in kW.
• Conditions: Capacities are based on a standard refrigerant piping length of 25 ft and a level difference of 0 ft.

Due to the extensive nature of these tables, specific values are not reproduced here but are available in the original document.

Capacity Correction Factor by Refrigerant Piping Length

Graphs illustrate the capacity correction factor based on the length of the refrigerant piping. These factors are applied to the nominal capacities to account for variations in piping length and refrigerant charge. The graphs show separate curves for cooling and heating, indicating how the correction factor decreases as piping length increases.

Notes:

• The correction ratio is the same regardless of whether the outdoor unit is installed above or below the indoor unit.
• Capacity = Engineering data capacity x capacity correction factor.
• Actual unit piping length should not exceed the maximum specified length.

Operation Limit

The operation limit graphs define the permissible operating temperature ranges for the units in cooling and heating modes. These graphs plot outdoor temperature against indoor temperature to show the continuous operation zone and pull-down period.

Sound Level

Sound level data is provided for the indoor units, measured in an anechoic chamber. This includes sound pressure levels across various octave bands and overall noise criteria.

Sound Pressure Level (Cooling)

Sound Pressure Level (Heating)

NC Curve: A graph is provided showing Noise Criteria (NC) curves for different sound levels (Silent, Low, Medium, High, Turbo) across various octave band frequencies. This helps in assessing the perceived loudness of the unit in different environments.

Electric Characteristic

This table details the electrical characteristics of the unit combinations, including Maximum Circuit Amps (MCA), Maximum Overcurrent Protection (MOP), Compressor Input Current (A), Rated Operating Frequency (RHz), Outdoor Fan Motor (OFM) and Indoor Fan Motor (IFM) power, and Maximum Operating Current (MOC).

Notes:

• RHz indicates the maximum frequency for cooling and heating operation.
• RLA (not shown in table, but implied by 'A' under COMP) is the maximum current during operation.
• Maximum allowable voltage unbalance between phases is 2%.
• Wire size should be selected based on the larger value of MCA.
• Use a circuit breaker instead of a fuse.