Trane 5TWR5 User manual

18-BC118D1-1A-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.
Heat Pumps
5TWR5
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. All of the manufacture’s split
systems are AHRI rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and out-
door split systems are maximum efficiency, optimum performance and the best overall system reliability.
Installation and Operation Manual
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......................................... 5
Section 6. Refrigerant Line Routing ..................................................... 6
Section 7. Refrigerant Line Brazing...................................................... 8
Section 8. Refrigerant Line Leak Check ............................................... 9
Section 9. Evacuation and Servicing .................................................... 9
Section 10. Service Valves ................................................................... 10
Section 11. Electrical - Low Voltage ................................................... 11
Section 12. Electrical - High Voltage .................................................. 13
Section 13. Start Up.............................................................................. 14
Section 14. System Charge Adjustment............................................. 14
Section 15. Checkout Procedures....................................................... 18
Section 16. Defrost Control ................................................................. 19
Section 17. Troubleshooting ................................................................ 22
Section 18. Wiring Diagrams ............................................................... 24
Section 19. Pressure Curves ............................................................... 27
Section 20. Refrigerant Circuit (only for reference)........................... 31

2 18-BC118D1-1A-EN
Section 1. Safety
WARNING
!
HAZARDOUS VOLTAGE!
Failure to follow this Warning could result in property
damage, severe personal injury, or death.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized.
WARNING
!
REFRIGERANT OIL!
Any attempt to repair a central air conditioning product
may result in property damage, severe personal injury,
or death.
Use only R-454B approved service equipment. All
R-454B systems with variable speed compressors use
variable speed compressor oil that readily absorbs
moisture from the atmosphere. To limit this
‘hygroscopic’ action, the system should remain sealed
whenever possible. If a system has been open to the
atmosphere for more than 4 hours, the compressor oil
must be replaced. Never break a vaccum with air and
always change the driers when opening the system for
component replacement.
HOT SURFACE!
May cause minor to severe burning. Failure to follow
this Caution could result in property damage or per-
sonal injury. Do not touch top of compressor.
CAUTION
!
CONTAINS REFRIGERANT!
Failure to follow proper procedures can result in
personal illness or injury or severe equipment
damage.
System contains oil and refrigerant under high
pressure. Recover refrigerant to relieve pressure
before opening system.
CAUTION
!
GROUNDING REQUIRED!
Failure to inspect or use proper service tools may
result in equipment damage or personal injury.
Reconnect all grounding devices. All parts of this
product that are capable of conducting electrical
current are grounded. If grounding wires, screws,
straps, clips, nuts, or washers used to complete a
path to ground are removed for service, they must be
returned to their original position and properly
fastened.
CAUTION
!
WARNING
!
SERVICE VALVES!
Failure to follow this warning will result in abrupt re-
lease of system charge and may result in personal in-
jury and/or property damage. Extreme caution should
be exercised when opening the Suction and Liquid
Line Service Valve. Turn valve stem counterclockwise
only until the stem contacts the rolled edge. No torque
is required.
WARNING
!
WARNING
!
BRAZING REQUIRED - IF USING MECHANICAL
CONNECTIONS, ENSURE LEAK TEST IS
NEGATIVE!
Failure to inspect lines or use proper service tools
may result in equipment damage or personal injury.
If using existing refrigerant lines make certain that all
joints are brazed, not soldered.
HIGH LEAKAGE CURRENT!
Failure to follow this Warning could result in property
damage, severe personal injury, or death.
Earth connection essential before connecting
electrical supply.
NOTE: R454B refrigerant is a blend and should only
be added to the system in liquid form.
Important: If using other than copper pipe, follow
manufacturer’s installation instructions. Joints must
be brazed or other UL/IMC/URMC approved joint that
meets pressure requirements.
WARNING
!
RISK OF FIRE!
Flammable refrigerant used. To be repaired only by
trained service personnel. Do not puncture refrigerant
tubing.
Dispose of properly in accordance with federal or local
regulations. Flammable refrigerant used.
VENTILATION
Ensure that the area is in the open or that it is ad-
equately ventilated before breaking into the system or
conducting any hot work.
WARNING
!
Mode Model Operating Range
Cooling 1.5 – 5 Ton 55°F – 120°F
Heating 1.5 – 5 Ton 0°F – 66°F

18-BC118D1-1A-EN 3
Table 2.2
When mounting the outdoor unit on a roof, be sure the roof will support the unit’s weight.
Properly selected isolation is recommended to alleviate sound or vibration transmission to the building structure.
Unit Dimensions and Weight
Models H x D x W (in) Weight* (lb)
5TWR5018A 33 x 30 x 33 174
5TWR5024A 33 x 30 x 33 174
5TWR5030A 33 x 30 x 33 174
5TWR5036A 37 x 34 x 37 199
5TWR5042A 45 x 34 x 37 250
5TWR5048A 45 x 34 x 37 250
5TWR5060A 45 x 34 x 37 251
* Weight values are estimated uncrated.
Section 2. Unit Location Considerations
2.1 Piping Guidelines
Piping material, pipe routing, and installation shall include protection from physical damage in operation and
service, and be in compliance with national and local codes and standards. All field joints shall be accessible for
inspection prior to being covered or enclosed. Install of pipe work shall be kept to a minimum.
That provisions shall be made for expansion and contraction of long runs of piping.
2.2 Unit Dimensions and Weight
D
H
W
Standard
Line Set
150’ Max
TOTAL Line Length
50’
Max
Vertical
Change
50’
Max
Vertical
Change
2.3 Refrigerant Piping Limits
1. The maximum TOTAL length of refrigerant lines from outdoor to indoor unit should NOT exceed 150 feet
(including lift).
2. The maximum vertical change should not exceed 50 feet.
3. Service valve connection diameters are shown in Table 5.1.
Note: For other line lengths, refer to Refrigerant Piping Application Guide, SS-APG006F-EN, or Refrigerant
Piping Software Program.

4 18-BC118D1-1A-EN
2.5 Cold Climate Considerations
NOTE: It is recommended that these precautions be taken for units being installed in areas where snow
accumulation and prolonged below freezing temperatures occur.
• Units should be elevated 3-12 inches above the pad or rooftop, depending on local weather. This additional
height will allow drainage of snow and ice melted during defrost cycle prior to its refreezing. Ensure that drain
holes in unit base pan are not obstructed preventing draining of defrost water.
• If possible, avoid locations that are likely to accumulate snow drifts. If not possible, a snow drift barrier should be
installed around the unit to prevent a build-up of snow on the sides of the unit.
2.6 Coastal Considerations
If installed within one mile of salt water, including seacoasts and inland waterways, models without factory
supplied Seacoast Salt Shields require the addition of BAYSEAC001 (Seacoast Kit) at installation time.
STEP 2 - To remove the unit from the pallet, remove tabs by cutting with a sharp tool.
Section 3. Unit Preparation
3.1 Prepare the Unit for Installation
STEP 1 - Check for damage and report promptly to the carrier any damage found to the unit.
Section 4. Setting the Unit
4.1 Pad Installation
When installing the unit on a support pad, such as a concrete slab, consider the following:
• The pad should be at least 1” larger than the unit on all sides.
• The pad must be separate from any structure.
• The pad must be level.
• The pad should be high enough above grade to allow for drainage.
• The pad location must comply with National, State, and Local codes.
Min. 12” to
Shrubbery
Avoid Install
Near Bedrooms
Min 5’ Unrestricted
Access Panel
Min 3’
Unrestricted
2.4 Suggested Locations for Best Reliability
Ensure the top discharge area is unrestricted for at least
five (5) feet above the unit.
Three (3) feet clearance must be provided in front of the
control box (access panels) and any other side requiring
service.
It is not recommended to install in a location where noise
may distract the building occupants. Some examples of
these types of locations are sleeping quarters and by
windows of a living area. Please discuss location with the
building owner prior to installation.
Avoid locations such as near windows where condensa-
tion and freezing defrost vapor can annoy a customer.
Position the outdoor unit a minimum of 12” from any wall
or surrounding shrubbery to ensure adequate airflow.
Outdoor unit location must be far enough away from any
structure to prevent excess roof runoff water or icicles
from falling directly on the unit.

18-BC118D1-1A-EN 5
Section 5. Refrigerant Line Considerations
5.1 Refrigerant Line and Service Valve Connection Sizes
Table 5.1
Line Sizes Service Valve Connection Sizes
Model Vapor
Line
Liquid
Line
Vapor Line
Connection
Liquid Line
Connection
5TWR5018A 5/8 5/16 3/4 5/16
5TWR5024A 3/4 5/16 3/4 5/16
5TWR5030A 3/4 5/16 3/4 5/16
5TWR5036A 3/4 5/16 3/4 5/16
5TWR5042A 7/8 5/16 7/8 5/16
5TWR5048A 7/8 5/16 7/8 5/16
5TWR5060A 7/8 3/8 7/8 3/8
Alternate Refrigerant Line and Service Valve Connection Sizes
Line Sizes Service Valve Connection Sizes
Model Vapor
Line
Liquid
Line
Vapor Line
Connection
Liquid Line
Connection
5TWR5018A 5/8 3/8 3/4 5/16
5TWR5024A 3/4 3/8 3/4 5/16
5TWR5030A 3/4 3/8 3/4 5/16
5TWR5036A 3/4 3/8 3/4 5/16
5TWR5042A 7/8 3/8 7/8 5/16
5TWR5048A 7/8 3/8V 7/8 5/16
5TWR5060A 7/8 3/8 7/8 3/8
5.4 Refrigerant Line Insulation
Important: The Vapor Line must always be
insulated. DO NOT allow the Liquid Line and
Vapor Line to come in direct (metal to metal)
contact.
Vapor Line
Liquid Line
Insulation
Line Length
5.3 Required Refrigerant Line Length
Determine required line length and lift. You will
need this later in STEP 2 of Section 14.
Total Line Length = __________ Ft.
Total Vertical Change (lift) = __________ Ft.
5.2 Factory Charge
The outdoor condensing units are factory charged with the system charge required for the outdoor condensing
unit, ten (10) feet of tested connecting line, and the smallest rated indoor evaporative coil match. Always verify
proper system charge via subcooling (TXV/EEV) or superheat (fixed orifice) per the unit nameplate.