Goodman Mfg IO-402G important safety instructions Single State LOW Voltage HOOK-UP

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Example:

A 7 ½ Ton unit is to be installed. The distance from the building to the unit is 75’. Calculate the minimum wire size assuming no more than 2% voltage drop.

MCA for 7 ½ Ton 230V unit = 43.3 (from S&R plate).

Applying previous table wire sizes less than #8 AWG cannot be used for circuits which have a rating of 45A. The #8 wire is not suitable since the maximum length for a 45A circuit is 68’.

Solution: Use a #6 AWG wire suitable up to 110’.

NOTE: It is the contractors’s responsibility to follow the NEC (USA) or CEC (Canada) when sizing the service wire for this unit.

Local codes often require a disconnect switch located near the unit; do not install the switch on the unit. Refer to the installa- tion instructions supplied with the indoor furnace/air handler for specific wiring connections and indoor unit configuration. Like- wise, consult the instructions packaged with the thermostat for mounting and location information.

Overcurrent Protection

The following overcurrent protection devices are approved for use.

Time delay fuses

HACR type circuit breakers

These devices have sufficient time delay to permit the motor- compressor to start and accelerate its load.

Refer to the unit serial plate and this table for the maximum overcurrent protection permitted.

Run all line voltage wiring a conduit from the service discon- nect box to the unit. Refer to the NEC (USA) or CEC (Canada) codes for the correct size conduit based on the wire size. The conduit enters the control box through the hole provided in the bottom. NOTE: The control box hole is sized for 3/4” conduit. If permitted by code, a flexible conduit is preferred to minimize vibration transmission from the unit to the building.

Connect the line voltage wires to the L1, L2, and L3 terminals of the definite purpose contactor (located in the unit control box). Refer to the wiring diagram attached to the unit when making these connections.

To correct, disconnect power and switch any two leads at the unit contactor and re-observe.

High Voltage Connections

Route power supply and ground wires through the high voltage port and terminate in accordance with the wiring diagram pro- vided inside the control panel cover.

Low Voltage Connections

Condensing unit control wiring requires a two-conductor low voltage circuit from the room thermostat. The wiring should be no smaller than 18 AWG and the field connection for this cir- cuit must be made in the unit control box using solderless connectors (i.e. wire nuts). See the following diagram for a typical low voltage hook-up.

SINGLE STATE LOW VOLTAGE HOOK-UP

THERMOSTAT CHT18-60

Y1

W1

R

G

 

 

 

AIR

 

 

 

HANDLER

 

 

 

AH090/120

CONDENSING

 

 

GREEN

UNIT

 

 

 

CKL090/120

 

 

RED

 

 

 

YELLOW

 

 

 

BLACK

 

 

WHITE

BLUE

 

 

BLUE

NOTES:

1). THERMOSTAT TO AIR HANDLER CABLE MUST HAVE A MINIMUM OF (4) CONDUCTORS

 

 

 

 

2). AIR HANDLER TO CONDENSING UNIT CABLE

WIRE NUT

MUST HAVE A MINIMUM OF (2) CONDUCTORS

 

 

 

System Start Up

Never operate the compressor with the suction valve closed to test the compressor’s pumping efficiency. In some cases, this can result in serious compressor damage and loss of warranty coverage.

NOTICE

THIS UNIT IS SHIPPED WITH A NITROGEN/HELIUM HOLDING CHARGE ONLY. UNIT MUST BE EVACUATED AND CHARGED PER INSTALLATION INSTRUCTIONS WITH REFRIGERANT LISTED ON SERIAL RATING PLATE.

Three Phase Compressor Rotation

CAUTION

Use care when handling scroll compressors. Dome temp- eratures could be hot.

Three phase scrolls are power phase dependent and can com- press in more than one direction.

Verify proper rotation for three phase compressors by ensuring the suction pressure drops and discharge pressure rises when the compressor is energized. NOTE: When operated in re- verse, a three phase scroll compressors is noisier and its cur- rent draw substantially reduced compared to marked values.

NOTICE

UNITS SHIPPED WITH A HOLDING CHARGE ARE INTENDED FOR COMPONENT REPLACEMENT ONLY ON EXISTING SYSTEMS, AND NOT INTENDED FOR USE IN NEW SYSTEMS OR NEWLY CONSTRUCTED HOMES.

NOTICE

UNITS MUST ONLY BE USED AS REPLACEMENT COMPONENTS FOR PRE-2010 INSTALLED SYSTEMS.

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Contents Shipping Inspection Important Safety InstructionsImportant Note to the Owner Regarding Product Warranty Codes & RegulationsSafe Refrigerant Handling Installation ClearancesRooftop Installations Refrigerant LinesBurying Refrigerant Lines Leak Testing Nitrogen or Nitrogen-Traced Refrigerant Line ConnectionsSystem Evacuation Electrical Connections No LeaksHigh Voltage Connections Three Phase Compressor RotationOvercurrent Protection Low Voltage ConnectionsFinal Charge Adjustment Charge VerificationSaturated Suction Pressure Temperature Chart Fixed Orifice Expansion Valve SystemTroubleshooting Information CoolingThis page Intentionally Left Blank Split Systems Condensing AC Unit Or deathRigging Cond Unit Refrigerant Line Length ft 25-49 50-74 Tons Suct LiqRefrigerant Line Connections 208/230V 197 253 460V 414 506 Minimum Circuit Ampacity MCASingle State LOW Voltage HOOK-UP Troubleshooting Ft-lbsTroubleshooting Analysis Table Wiring Diagram

CONDENSING AC UNIT SINGLE / THREE PHASE AIR CONDITIONERS, IO-402G specifications

Goodman Manufacturing's IO-402G is a prominent model in the realm of condensing air conditioning units, designed to serve both residential and commercial applications effectively. This unit stands out due to its robust construction and impressive energy efficiency, making it a reliable choice for air conditioning needs.

One of the main features of the IO-402G is its versatile power options, available in both single and three-phase configurations. This adaptability allows it to meet various electrical requirements, ensuring compatibility with different installation environments. The unit's design incorporates a high-efficiency scroll compressor, which not only optimizes cooling performance but also enhances durability while significantly reducing operational noise.

The IO-402G is equipped with advanced refrigerant management technology, utilizing R-410A refrigerant, which is environmentally friendly and delivers superior cooling efficiency compared to older refrigerants. This feature reflects Goodman’s commitment to sustainability while also aligning with regulatory changes in refrigerant usage. The unit’s efficiency is further complemented by a high SEER (Seasonal Energy Efficiency Ratio) rating, positioning it among the more energy-efficient systems available in the market today.

In terms of construction, the IO-402G boasts a durable cabinet designed to withstand various weather conditions, featuring a powder-coated finish that resists corrosion and fading. The unit also includes sound-dampening technology to minimize operational noise, ensuring that it operates quietly even in residential settings.

Additionally, the IO-402G provides easy access for service and maintenance, thanks to a user-friendly design that simplifies troubleshooting and repairs. The system is also compatible with a range of Goodman’s thermostats and controls, which can enhance user experience through smart technology and programmable settings.

Furthermore, Goodman’s commitment to quality is reflected in the warranty coverage available with the IO-402G, typically offering a generous limited warranty on parts, underscoring the manufacturer’s confidence in the unit’s longevity and performance.

Overall, the Goodman IO-402G condensing AC unit is an excellent choice for those seeking a reliable, efficient, and durable air conditioning solution for both residential and commercial applications. Its innovative design and thoughtful features make it a standout model in Goodman’s lineup, ensuring comfort and satisfaction for users all year round.