Trane 4TWA3 manual Typical Field HOOK-UP Diagrams

Page 5

I. ELECTRIC HEATERS

Electric heaters, if used, are to be installed in the air han- dling device according to the instructions accompanying the air handler and the heaters.

J. START CONTROL

Some models have quick start components which are factory installed. For models that do not have factory installed start components, provisions are made for a field installed start kit accessory. When adding an accessory, follow the instructions provided with the kit.

K. OUTDOOR THERMOSTAT

An outdoor thermostat TAYSTAT250B may be field installed. For data, see wiring diagram attached to unit and instruc- tion sheet packaged with outdoor thermostat.

L. SEACOAST SALT SHIELD

Units installed within one mile of salt water including seacoasts and inland waterways, require the addition of BAYSEAC001 (Seacoast Kit) at the time of installation.

IMPORTANT:

See Limited Warranty information in Use and Care Manual.

Installer’s Guide

M. TROUBLESHOOTING

TROUBLESHOOTING CHART — WHAT TO CHECK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

.

 

 

 

REF

 

 

 

*

 

 

 

 

 

 

 

 

 

 

 

CONTROL

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

 

 

WHAT

HIGH

 

 

 

 

 

 

 

 

 

 

 

.

 

 

 

.

 

 

 

DEFROST

 

 

 

 

 

 

 

 

 

LOW

 

 

 

STUCK

REF

 

 

AIR

 

 

CIR

SOVCHECK

 

 

 

 

 

 

 

 

 

CONTACTOR

 

 

LOW

 

EXCESSIVE

RES

 

 

 

 

 

DEFROST

 

 

TO

 

 

 

 

 

 

 

 

 

REF

 

 

TXV

RES .

 

 

 

 

 

 

 

START

 

 

 

 

 

 

 

.

 

 

.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

.

 

 

 

 

 

.

 

 

COIL

 

 

 

 

POWERVOLTAGE

RUN

 

 

VOLTAGE

 

 

 

INEFFICIENT

 

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

.

 

 

 

I

 

 

 

VALVE

 

 

SYSTEM FAULTS CHECK COMPRESSOR

START

 

 

CONTACTOR

 

 

 

.

 

 

D

 

SOV

 

 

 

 

 

 

 

 

VOLTAGE

 

 

 

 

 

.

 

 

 

 

CONTROL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NONCONDENSABLESSTUCK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRANSFORMER

 

 

EVAP

RECIRCULATIONRESTRICTIONS

RELAY

 

 

 

 

 

 

 

 

 

 

 

UNDERCHARGE.

 

 

 

 

 

 

 

 

 

 

 

 

 

THERMOSTATCOMPRESSOROVERCHARGE

 

 

SUPERHEAT

 

DEFECTIVE

 

 

 

 

 

 

CAPACITORCAPACITORCONTACTS

 

 

 

 

 

 

 

AIRFLOW

 

 

 

 

 

SUPPLYWIRING

 

 

RELAY

WIRING

 

 

FUSE COMP

 

 

 

AIRFLOWLEAKINGLEAKING

 

 

 

MODE

 

IOL

 

 

 

 

 

LOAD

 

 

OPEN

 

 

 

 

 

DEFDEF

 

 

 

 

 

 

 

 

 

 

 

COIL

.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

. .

REFRIGERANT CIRCUIT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Head Pressure Too High

 

C

 

 

 

 

 

 

 

 

 

 

 

 

P

P

S

P

S

 

 

 

S

 

 

 

 

 

H

 

 

 

 

 

 

 

 

 

 

 

 

P

P

S

 

 

 

 

P

S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Head Pressure Too Low

 

C

 

 

 

 

 

 

 

 

 

 

 

S

P

 

 

 

 

 

S

S

 

S

S

S

P

 

 

H

 

 

 

 

 

 

 

 

 

 

 

S

P

 

 

 

 

 

S

S

 

S

S

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Suction Pressure Too High

 

C

 

 

 

 

 

 

 

 

 

 

 

S

P

P

 

 

 

 

S

 

 

P

 

P

 

 

H

 

 

 

 

 

 

 

 

 

 

 

S

 

 

 

 

 

 

 

S

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Suction Pressure Too Low

 

C

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

 

 

 

S

P

S

 

S

 

 

 

H

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

S

S

 

S

 

S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Liquid Refrig. Floodback (TXV)

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

 

 

P

 

 

H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I.D. Coil Frosting

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

S

S

 

 

 

 

 

 

 

 

 

 

H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compressor Runs

 

 

C

 

 

 

 

 

 

 

 

 

 

 

S

P

 

S

S

 

 

 

S

P

S

S

S

S

 

Inadequate or No Cooling/Htg

 

H

 

 

 

 

 

 

 

 

 

 

 

S

P

 

 

S

 

 

 

S

P

S

S

 

S

 

ELECTRICAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compressor & O.D. Fan

 

C

P

P

 

 

 

 

 

S

P

S

P

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Won’t Start

 

 

H

P

P

 

 

 

 

 

S

P

S

P

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compressor Will Not Start

 

C

 

P

S

P

S

S

S

 

 

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

But O.D. Fan Runs

 

 

H

 

P

S

P

S

S

S

 

 

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O.D. Fan Won’t Start

 

C

 

P

 

P

 

 

S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

 

P

 

P

 

 

S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compressor Hums But Won’t Start

 

C

 

 

 

P

S

S

S

 

 

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

 

 

 

P

S

S

S

 

 

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compressor Cycles on IOL

 

C

 

P S P S S S

 

 

 

 

P S P P S

 

S S

 

S

 

 

S

 

 

 

 

H

 

P S P S S S

 

 

 

 

P S P P S

 

S

 

 

S P

 

S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I.D. Blower Won’t Start

 

C

P

P

 

 

 

 

 

S

P

S

 

S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

P

P

 

 

 

 

 

S

P

S

 

S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DEFROST

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unit Won’t Initiate

Defrost

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P

P

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Defrost Terminates on Time

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unit Icing Up

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

S

S

 

 

S

 

 

P

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C - Cooling

H - Heating

P - Primary Causes

 

S - Secondary Causes

* - 3 Phase Only

 

 

 

 

 

 

 

 

TYPICAL FIELD HOOK-UP DIAGRAMS

Notes:

1.Be sure power supply agrees with equipment nameplate.

2.Power wiring and grounding of equipment must comply with local codes.

3.Low voltage wiring to be No. 18 AWG minimum conductor.

4.ODT-B must be set lower than ODT-A.

5.If outdoor thermostats (ODT) are not used, connect W1 to W2 and W3.

6.N/A to programmable thermostat.

LEGEND

FACTORY WIRING

FIELD WIRING

18-BC62D1-1

5

Page 4 Page 6
Image 5
Page 4 Page 6
Contents FT. Above Unit Unrestricted GeneralUSE only R-410A Refrigerant and Approved POE Compressor OIL Service Valve Operation Installing Refrigerant LinesLiquid Line Service Valve Location and Preparation UnitGAS Line Service Valve GAS Line Ball Service ValveElectrical Connections Operational Checkout ProceduresDefrost Control Compressor Start UPTypical Field HOOK-UP Diagrams Subcooling Charging in Cooling Above 55F OD Ambient 410A Refrigerant Charging ChartSubcooling Charging below 55F OD Ambient in Heating only Liquid Design Subcooling ˚F Temp Liquid Gage Pressure PSIModels Base 4TWA3 Outline DrawingMounting Hole Location Checkout Procedure

4TWA3 specifications

The Trane 4TWA3 is a highly efficient air conditioning unit designed to provide exceptional cooling performance for residential and light commercial applications. Known for its advanced technology and innovative features, the 4TWA3 has become a popular choice among homeowners looking for reliable climate control.

One of the standout features of the Trane 4TWA3 is its variable-speed compressor. This technology enables the unit to adjust its cooling capacity based on the current temperature and humidity levels, ensuring optimal comfort while maintaining energy efficiency. By operating at varying speeds, the compressor uses less energy compared to traditional single-speed units, ultimately resulting in lower utility bills.

The efficiency of the Trane 4TWA3 is reinforced with its SEER (Seasonal Energy Efficiency Ratio) rating, which typically ranges from 14 to 16. This rating indicates how effectively the system converts electricity into cooling power, allowing homeowners to enjoy a more cost-effective and environmentally friendly cooling solution. Additionally, the unit is equipped with an environmentally friendly refrigerant, R-410A, which helps reduce ozone depletion.

Another notable characteristic of the 4TWA3 is its robust construction, featuring a durable, weather-resistant cabinet designed to withstand various outdoor conditions. This ensures longevity and reliability throughout its operational lifetime. The cabinet's design also aids in reducing noise levels, making the system quieter compared to competitors while maintaining high performance.

The Trane 4TWA3 also incorporates a user-friendly control system, enabling homeowners to easily manage their indoor climate. With advanced thermostat options, including programmable and smart thermostats, users can customize their cooling schedules, further enhancing energy savings.

Moreover, installation and maintenance of the 4TWA3 are straightforward, with Trane offering comprehensive support through their network of certified professionals. This ensures that the unit performs at its best for years to come.

In conclusion, the Trane 4TWA3 combines advanced technology with high efficiency, robustness, and user-friendly features. Its variable-speed compressor, impressive SEER rating, durable construction, and smart control options make it an exceptional choice for those seeking reliable and effective air conditioning solutions. Whether for residential or light commercial use, the 4TWA3 stands out as a testament to Trane's commitment to quality and performance in modern climate control systems.
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