Trane 4TTR4018N User Manual

18-AC51D1-10F-EN
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT – This Document is customer property and is to remain with this unit. Please return to service informa-
tion pack upon completion of work.
Condensing Units
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with
the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the
purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.
Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. Some of the benefits of
installing approved matched indoor and outdoor split systems are maximum efficiency, optimum performance and the best overall
system reliability.
4TTR4018 – 060
Table of Contents
Section 1. Safety ..................................................................................... 2
Section 2. Unit Location Considerations ............................................. 3
Section 3. Unit Preparation.................................................................... 4
Section 4. Setting the Unit ..................................................................... 4
Section 5. Refrigerant Line Considerations ......................................... 4
Section 6. Refrigerant Line Routing ..................................................... 5
Section 7. Refrigerant Line Brazing ...................................................... 7
Section 8. Refrigerant Line Leak Check ............................................... 7
Section 9. Evacuation ............................................................................ 8
Section 10. Service Valves .................................................................... 8
Section 11. Electrical - Low Voltage ..................................................... 9
Section 12. Electrical - High Voltage .................................................. 10
Section 13. Start Up.............................................................................. 11
Section 14. System Charge Adjustment............................................. 11
Section 15. Checkout Procedures ...................................................... 15
Section 16. Refrigerant Circuits (Reference only) ............................. 15
Section 17. Wiring Diagrams ............................................................... 16
Section 18. Pressure Curves ............................................................... 20
Installation and Operation Manual

Trane 4TTR4018N Specifications

General

Brand	Trane
Model	4TTR4018N
Category	Heat Pump
Language	English

Summary

Section 1. Safety

Section 2. Unit Location Considerations

2.1 Unit Dimensions and Weight

Provides physical specifications and weight for different condensing unit models.

2.2 Refrigerant Piping Limits

Details maximum allowed lengths and vertical changes for refrigerant lines.

2.3 Suggested Locations for Best Reliability

Recommends optimal placement for outdoor units to ensure airflow and reduce noise.

Section 3. Unit Preparation

3.1 Prepare The Unit For Installation

Steps for checking unit for damage and removing it from the pallet.

Section 4. Setting the Unit

4.1 Pad Installation

Guidelines for installing support pads, ensuring levelness and drainage.

Section 5. Refrigerant Line Considerations

5.1 Refrigerant Line and Service Valve Connection Sizes

Table detailing line sizes and service valve connection dimensions for various models.

5.2 Factory Charge

Information on the factory refrigerant charge and verifying system charge.

5.3 Required Refrigerant Line Length

Determining required line length and lift for system calculations.

5.4 Refrigerant Line Insulation

Instructions on insulating vapor and liquid lines to prevent heat exchange.

5.5 Reuse Existing Refrigerant Lines

Precautions for reusing existing refrigerant lines during installation.

Section 6. Refrigerant Line Routing

6.1 Precautions

Guidelines for routing refrigerant lines to prevent noise and ensure proper installation.

Section 7. Refrigerant Line Brazing

7.1 Braze The Refrigerant Lines

Step-by-step instructions for brazing refrigerant lines using dry nitrogen purge.

Section 8. Refrigerant Line Leak Check

8.1 Check For Leaks

Procedure for leak checking refrigerant lines using nitrogen and soapy solution.

Section 9. Evacuation

9.1 Evacuate the Refrigerant Lines and Indoor Coil

Steps for evacuating the system to a specific micron level.

Section 10. Service Valves

10.1 Open the Gas Service Valve

Instructions for safely opening the gas service valve after evacuation.

10.2 Open the Liquid Service Valve

Procedure for opening the liquid service valve with extreme caution.

Section 11. Electrical - Low Voltage

11.1 Low Voltage Maximum Wire Length

Table defining maximum total lengths for low voltage wiring based on wire gauge.

11.2 Low Voltage Hook-up Diagrams

Wiring diagrams illustrating low voltage connections for various thermostat and air handler types.

Section 12. Electrical - High Voltage

12.1 High Voltage Power Supply

Guidelines for high voltage power supply, wiring, and compliance with codes.

12.2 High Voltage Disconnect Switch

Recommendation for installing a separate disconnect switch at the outdoor unit.

12.3 High Voltage Ground

Requirements for grounding the outdoor unit according to codes.

Section 13. Start Up

13.1 System Start Up

Steps to follow for safely starting up the installed system.

Section 14. System Charge Adjustment

14.1 Temperature Measurements

Instructions for measuring outdoor and indoor temperatures for charging.

14.2 Subcooling Charging in Cooling

Procedure for subcooling charging method above 55°F outdoor temperature.

Section 15. Checkout Procedures

15.1 Operational And Checkout Procedures

Checklist for final unit inspection, wiring, and system operation.

Section 16. Refrigerant Circuits (Reference only)

Section 17. Wiring Diagrams

018N, 019N, 024N, 025N, 042N & 049N Models

Wiring schematics for specific outdoor unit models (018N to 049N).

030N, 036N & 048N Models

Wiring schematics for specific outdoor unit models (030N to 048N).

060N Models

Wiring schematics for the 060N outdoor unit model.

Section 18. Pressure Curves