Trane 2TTX4018B User Manual

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 information
pack upon completion of work.
Installer’s Guide
Condensing Units
2TTX4018-060 & 2TTX5024-048
These instructions do not cover all variations in
systems nor provide for every possible contingency to
be met in connection with installation. All phases of
this installation must comply with NATIONAL, STATE
AND LOCAL CODES. 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.
A. GENERAL
The following instructions cover 2TTX4 & 2TTX5; Condens-
ing Units.
NOTE:
The 2TTX4 outdoor units, except 2TTX4060, may be used
with indoor units equipped with Thermostatic Expansion
Valve or Accutron™ Flow Control Check Valve (F.C.C.V.)
assembly for refrigerant flow control only. The 2TTX5, and
2TTX4060 outdoor units must be used with indoor units
equipped with Thermostatic Expansion Valve only.
Check for transportation damage after unit is uncrated.
Report promptly, to the carrier, any damage found to the
unit.
To determine the electrical power requirements of the unit,
refer to the nameplate of the unit. The electrical power
available must agree with that listed on the nameplate.
B. LOCATION & PREPARATION
OF THE UNIT
1. When removing unit from the pallet, notice the tabs on
the basepan. Remove tabs by cutting with a sharp tool as
shown in Figure 2 (see page 2).
2. The unit should be set on a level support pad at least
as large as the unit base pan, such as a concrete slab.
If this is not the application used please reference
“XLi-APG**-EN” (* latest revision number).
3. The support pad must NOT be in direct contact with any
structure. Unit must be positioned a minimum of 12"
from any wall or surrounding shrubbery to insure
adequate airflow. Clearance must be provided in front
of control box (access panels) & any other side requiring
service access to meet National Electrical Code. Also,
the unit location must be far enough away from any
structure to prevent excess roof run-off water from
pouring directly on the unit. When choosing the location
of the unit(s), sound transmission through air and
1
refrigerant lineset should be taken into consideration. It
is recommended to locate unit(s) away from areas
(bedrooms, etc.) where such sound will be objectionable.
4. The top discharge area must be unrestricted for at least
five (5) feet above the unit.
5. When the outdoor unit is mounted on a roof, be sure the
roof will support the unit’s weight. Properly selected
isolation is recommended to prevent sound or vibration
transmission to the building structure.
6. The maximum length of refrigerant lines from outdoor to
indoor unit should NOT exceed sixty (60) feet.
7. If outdoor unit is mounted above the air handler, maxi-
mum lift should not exceed sixty (60) feet (suction line).
If air handler is mounted above condensing unit, maxi-
mum lift should not exceed sixty (60) feet (liquid line).
NOTE:
Refer to “Refrigerant Piping Software” Pub. No. 32-3312-0*,
and “Refrigerant Piping Manual” Pub. No. 32-3009-0* (the
position of the * denotes latest revision number).
8. Locate and install indoor coil or air handler in accor-
dance with instruction included with that unit.
5 FT. ABOVE UNIT-UNRESTRICTED
18-AC54D1-4

Trane 2TTX4018B Specifications

General

Model	2TTX4018B
Type	Heat Pump
Cooling Capacity (BTU/h)	18000
Heating Capacity (BTU/h)	18000
SEER Rating	16
Refrigerant	R-410A
Voltage	208/230
Phase	1
Frequency	60 Hz
Compressor Type	Scroll

Summary

General Unit Information

Unit Compatibility Notes

Notes on using 2TTX4 & 2TTX5 units with specific indoor unit valve types.

Transportation Damage Check

Instructions for checking and reporting any damage found after uncrating the unit.

Electrical Power Requirements

Guidance on determining and matching electrical power requirements to the unit's nameplate.

Unit Location and Preparation

Pallet Tab Removal

Instructions on removing tabs from the unit's basepan when removing it from the pallet.

Support Pad Requirements

Specifies setting the unit on a level support pad at least as large as the unit base pan.

Clearance and Airflow Requirements

Details minimum clearances from walls, shrubbery, and for service access.

Unrestricted Top Discharge

Specifies that the top discharge area must be unrestricted for at least five feet above the unit.

Roof Mounting Considerations

Advises checking roof support and using isolation for units mounted on a roof.

Refrigerant Line Length Limits

States the maximum length for refrigerant lines from outdoor to indoor units.

Indoor Coil/Air Handler Installation

Refers to other instructions for installing the indoor coil or air handler.

Accutron™ Flow Control Valve

Orifice Size Adjustment

Explains how to check and change the orifice size for optimal system performance.

Orifice Shipping Information

Informs that the unit ships with the correct orifice and a label.

Installing Refrigerant Lines

Line Material Caution

Warns to use brazed joints, not soldered, for refrigerant lines.

Brazing Connection Provisions

Notes that condensing units have provisions for braze connections and pressure taps.

Refrigerant Line Routing

Covers determining line routing, considering bends, space, and insulation.

Noise Vibration Control

Advises on using isolation hangers and insulating lines to prevent noise transmission.

Service Valve Operation

Liquid Service Valve Operation

Details the operation and caution for the brass liquid line service valve.

Gas Line Service Valve Operation

Explains the operation of the brass gas line ball service valve.

Brazing Refrigerant Lines

Provides steps for preparing and brazing refrigerant lines.

Refrigerant Line Leak Check

Leak Check Procedure

Details pressurizing lines with nitrogen and using soap bubbles to find leaks.

Leak Check Pressure

Specifies pressurizing with dry nitrogen to 350-400 psi for leak checking.

System Evacuation

Evacuation Preparation

Notes to keep refrigerant line valves closed and connect manifold gauges.

Evacuation Process

Describes evacuating the system to a micron gauge reading and checking for leaks.

Refrigerant Charging

Details charging refrigerant lines and indoor coil with vapor after evacuation.

Electrical Connections

Electrical Safety Precautions

Emphasizes exercising basic safety precautions to avoid electric shock during installation.

Wiring and Grounding Compliance

States power wiring and grounding must comply with local codes.

Low Voltage Wiring Guidelines

Recommends using color-coded low voltage wire and specifies max wire length.

Compressor Start Up Procedure

Initial Power Application

Details setting the thermostat to OFF, applying power, and activating sump heat.

Operational and Checkout Procedures

Procedure Reference

Directs users to page 8 for unit operational and checkout procedures.

Troubleshooting Guide

Troubleshooting Chart

Provides a chart of system faults, primary, and secondary causes.

Typical Field Hook-Up Diagrams

Single Stage/Two Stage Diagrams

Shows wiring for single/two-stage furnaces with air conditioners.

Variable Speed Air Handler Diagrams

Illustrates wiring for variable speed air handlers with air conditioners.

Wiring Diagram Notes

Provides important notes regarding power supply, grounding, wire size, and ODT usage.

Outline Drawing and Dimensions

Unit Outline Diagram

Shows the outline of the 2TTX4 & 2TTX5 units with key features labeled.

Dimensional Data Table

Provides a table of dimensions for various 2TTX4 and 2TTX5 models.

Mounting Hole Location

Base 3 Mounting Holes

Details the mounting hole locations and dimensions for Base 3 configurations.

Base 4 Mounting Holes

Details the mounting hole locations and dimensions for Base 4 configurations.

Checkout Procedure

Pre-Operation Checklist

Lists items to check after installation, before system operation.

System Operation Checks

Details checking component operation in different modes (Cool, Heat, Auto) and performance.

Owner Information Delivery

Instructs to inform the owner about operation and deliver the Use and Care Booklet.