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A2L Work Procedures
WARNING
Risk of Fire — Flammable Refrigerant!
Failure to follow instructions below could result in
death or serious injury, and equipment damage.
•
To be repaired only by trained service
personnel.
•
Do not puncture refrigerant tubing.
•
Dispose of properly in accordance with federal
or local regulations.
WARNING
Refrigerant under High Pressure!
Failure to follow instructions below could result in an
explosion which could result in death or serious
injury or equipment damage.
System contains 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.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.
The units described in this manual use R-454B refrigerant.
Use ONLY R-454B rated service equipment or components
with these units. For specific handling concerns with
R-454B, contact your local Trane representative.
Installation, repair, removal, or disposal should be
performed by trained service personnel.
At all times, Trane's maintenance and service guidelines
shall be followed. If in doubt, contact Trane technical
support for assistance.
Servicing
Prior to initiating work on equipment, check the area with
an appropriate refrigerant detector. Ensure the service
personnel are properly trained regarding work in potentially
toxic or flammable atmospheres. Ensure that the leak
detection equipment being used is suitable for use with all
applicable refrigerants, i.e. non-sparking, adequately
ARTC-SVX009A-EN
sealed, or intrinsically safe. Be aware that the refrigerant
does not contain an odor.
If any hot work is to be conducted on the refrigerating
equipment or any associated parts, appropriate fire
extinguishing equipment shall be available on hand. A dry
powder or CO
fire extinguisher should be located adjacent
2
to the charging area.
At all times, Trane's maintenance and service guidelines
shall be followed. In in doubt, contact Trane technical
support for assistance.
All maintenance staff and others working in the local area
shall be instructed on the nature of the work being carried
out. Work in confined spaces shall be avoided.
Ignition Source Mitigation
Do not use any sources of ignition when working on the
refrigeration system.
Keep all ignition sources, including cigarette smoking,
away from the site of installation, repair, removal or
disposal, during which refrigerant can potentially be
released to the surrounding space.
Survey the area around the equipment before initiating
work to ensure no flammable hazards or ignition risks are
present.
"No Smoking" signs shall be displayed.
Do not use devices that can be a source of ignition to
accelerate defrosting of components. Use only defrost and
cleaning procedures recommended by Trane. Do not
pierce or burn.
Ventilation
Ensure that the area is in the open or that it is adequately
ventilated before breaking into the system or conducting
any hot work. A degree of ventilation shall continue during
the period that the work is carried out. The ventilation
should safely disperse any released refrigerant and
preferably expel it externally into the atmosphere. If
present, check that the ventilation system, including
outlets, are operating adequately and are not obstructed.
Refrigerating Equipment
Refrigerant piping or components should not be installed in
locations where substances which may corrode them are
present.
Check that equipment hazard markings are visible and
legible. Replace them if they are not.
For equipment using secondary fluids, like water or glycol,
check that refrigerant is not present in the secondary fluid
loop before conducting any hot work.
Electrical Devices
Do not apply power to the circuit if a fault exists which
compromises safety. If the fault cannot be corrected
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