Trane RTXC XE Series Owner's manual

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Installation
Operation
Maintenance
RTXC XE Air-to-Water Screw Heat Pump
572568050001
SAFETY WARNING - Only qualified personnels should install and service the equipment. The installation, starting
up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific
knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result
in death or serious injury. When working on the equipment, observe all precautions in the literature and on the
tags, stickers, and labels that are attached to the equipment.
April 2021
Original Instructions
RTXC-SVX003B-EN

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Warnings Cautions and Notices
This document is customer property and is to remain with this unit. Only trained and qualified service personnel
should install, repair, or service air-conditioning equipment. Read this manual thoroughly before startup and follow
installation and service requirement to assure unit reliable operation. This manual does not contain all service
procedures necessary for the continued successful operation of this equipment. For more information, contact
your local agent.
Warnings, Cautions and Notices appear at appropriate sections throughout this literature. Read and follow these
carefully. WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate
injury. It may also be used to alert against unsafe practices.
NOTICE: Indicates a situation that could result in equipment or property-damage only accidents.
Important
Responsible Refrigerant Practices!
Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air
conditioning industry. All technicians who handle refrigerants must be certified. Know and follow the applicable
laws for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment used in these
service procedures.
WARNING - Contains Refrigerant!
System contains oil and refrigerant under high pressure. Recover refrigerant to relieve pressure before opening
the system. See unit nameplate for refrigerant type. Do not use non-approved refrigerants, refrigerant substitutes,
or refrigerant additives. Failure to follow proper procedures or the use of non-approved refrigerants, refrigerant
substitutes, or refrigerant additives could result in death or serious injury or equipment damage.
WARNING - Personal Protective Equipment (PPE) Required!
Always refer to appropriate guidelines when handling refrigerants. Use proper breathing, eye, and body protection
during the handling of refrigerants. Failure to follow proper handling guidelines could result in death or serious
injury.
WARNING - Live Electrical Components!
During installation, testing, servicing and troubleshooting of this product, it may be necessary to work with live
electrical components. Have a qualified licensed electrician or other individual who has been properly trained in
handling live electrical components perform these tasks. Failure to follow all electrical safety precautions when
exposed to live electrical components could result in death or serious injury.

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Installation Completion and Request for Trane Service
Important: A copy of this completed form must be submitted to the Trane Service Agency that will be responsible
for the start-up of the equipment. Start-up will NOT proceed unless applicable items listed in this form have been
satisfactorily completed.
TO:
TRANE SERVICE OFFICE:
S.O. NUMBER:
SERIAL NUMBERS:
JOB/PROJECT NAME:
ADDRESS:
The following items are being installed and will be completed by:
Important: Start-up must be performed by Trane or an agent of Trane specifically authorized to perform start-up
and warranty of Trane® products. Contractor shall provide Trane (or an agent of Trane specifically authorized to
perform start-up) with notice of the scheduled start-up at least two weeks prior to the scheduled start-up.
Equipment not started by Trane is not warranted by Trane.
Check box if the task is complete or if the answer is “yes”.
Unit location
□Provide enough space around unit to allow unobstracted air flow
□Unit mounting placed on a rigid and level foundation
□Isolator installed and fully tightened
□Secure no external vibration transmited to the unit
□Provide enough space around unit for installation and service personnel unrestricted access
Wiring
□Wiring size per all national or local codes and equipped with the remote fused disconnect switches
□Inspect all wiring connections to ensure correct and tight
□Ground all customer supplied power wires as required by applicable codes
□Distance between low voltage line and power wiring meet required
□Check compressor wiring connections corrected and tightened before power on
□Provide separately power for anti-freeze heater of evaporator, PHR BPHE or water pipes
Piping
□Water system designed by professional designers, such as piping diameter etc.
□Water pump head pressure matches actual water side Resistance
□Water strainer installed before inlet of the unit and cleaned prior to connection
□Water pressure guages installed with shutoff valves to monitor evaporator pressure drop
□Vibration eliminators equipped to prevent vibration transmission through the water pipes
□Air vent, drain and feed valve at the right position of water system
□Meet minimum water loop volume of 9 liter/kW to stable leaving water temperature for comfort
cooling
□Thoroughly flush all external water piping before final piping connecting to the unit
□Pass water system pressurization test and no water leakage identified
□Water system filled and air bled from system
□Anti-freeze protection actived after water system filled in winter
□Flow switch installed (if not factory-provided)
□External interlocks (flow switch, pumps auxiliary, etc.) per Wiring Schematics of the manual
□Water piping insulated and fixed
□Evaporator bypass valve installed as required (if installed)
Installation Completion and Request for Trane Service
Power Supply
□Voltage must be within the utilization range of the unit nameplate and imbalance must not exceed
2%
□Power supply should not be temporarily provided
□Power phase sequence correct
□Owner or representative should participate the commissioning
□Enough equipment support, like ladder, elevating platforms, etc. for the commissioning personnel
□Oil sump heaters operated at least 12 hours before starting
□Measure and check the oil sump level within allowable range before startup (if necessary)
Test
□Dry nitrogen available for pressure testing (if necessary)
Refrigerant
□Refrigerant on job site and in close proximity to unit (if shipped separately)
Note: After commissioning is complete, it is the installer’s responsibility to transport empty refrigerant
containers to an easily accessible point of loading to facilitate container return or recycling.

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System
□Systems can be operated under all design selection points to verify proper operation.
Note: Additional time required to properly complete the start-up and commissioning, due to any
incompleteness of the installation, will be invoiced at prevailing rates.
This is to certify that the Trane equipment has been properly and completely installed, and that the
applicable items listed above have been satisfactorily completed.
Checklist Completed by
(Print Name):
SIGNATURE:
DATE:
In accordance with your quotation and our purchase order number, we therefore require the
presence of Trane service on this site, for the purpose of start-up and commissioning, by
______________ (date).
Note: Minimum of two week advance notification is required to allow for scheduling of unit start-up.
ADDITIONAL COMMENTS/INSTRUCTIONS
Note: A copy of this completed form must be submitted to the Trane Service Agency that will be
responsible for start-up of equipment.

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Contents
Model Number Description ...............................................................................6
General Information.......................................................................................... 7
General Data ..................................................................................................10
Installation Requirements ...............................................................................11
Electrical Controls............................................................................................ 30
Controls ..........................................................................................................36
Operating Principles .......................................................................................38
Pre-Start Checkout .........................................................................................42
Unit Start-up and Shut-down Procedures .......................................................46
Periodic Maintenance .....................................................................................49
Maintenance and Service ...............................................................................51