Decommissioning; A2L Application Considerations; Ignition Sources In Ductwork; Ignition Sources In Unit - Trane IntelliPak 3 with Symbio 800 Installation, Operation And Maintenance Manual

• Ensure that the refrigerating system is earthed prior to
charging the system with refrigerant.
• Label the system when charging is complete (if not
already).
• Extreme care shall be taken not to overfill the
refrigerating system.
Prior to recharging the system, it shall be pressure-tested
with the appropriate purging gas. The system shall be leak-
tested on completion of charging but prior to
commissioning. A follow up leak test shall be carried out
prior to leaving the site.
Prior to refrigerant charging, open all appropriate valves,
including solenoid and electronic expansion valves (EXVs).
Use control settings, where available. When not available,
manually open all electronically controlled valves using
acceptable service procedures.

Decommissioning

Before carrying out the decommissioning procedure, it is
essential that the trained service personnel is completely
familiar with the equipment and all its details. It is
recommended good practice that all refrigerants are
recovered safely. Prior to the task being carried out, an oil
and refrigerant sample shall be taken in case analysis is
required prior to re-use of recovered refrigerant. It is
essential that electrical power is available before the task is
commenced.
1. Become familiar with the equipment and its operation.
2. Isolate system electrically.
3. Before attempting the procedure, ensure that:
a. Mechanical handling equipment is available, if
required, for handling refrigerant cylinders.
b. All personal protective equipment is available
and being used correctly.
c. The recovery process is supervised at all times
by a competent person.
d. Recovery equipment and cylinders conform to
the appropriate standards.
4. Pump down refrigerant system, if possible.
5. If a vacuum is not possible, make a manifold so that
refrigerant can be removed from various parts of the
system.
6. Make sure that cylinder is situated on the scales before
recovery takes place.
7. Start the recovery machine and operate in accordance
with instructions.
8. Do not overfill cylinders (no more than 80% volume
liquid charge).
9. Do not exceed the maximum working pressure of the
cylinder, even temporarily.
10. When the cylinders have been filled correctly and the
process completed, make sure that the cylinders and
RT-SVX080A-EN
the equipment are removed from site promptly and all
isolation valves on the equipment are closed off.
11. Recovered refrigerant shall not be charged into another
refrigerating system unless it has been cleaned and
checked.
12. When equipment has been decommissioned, attach a
signed label which includes the date of
decommissioning.

A2L Application Considerations

This product is listed to UL standard 60335-2-40,
Household and Similar Electrical Appliances – Safety –
Part 2-40: Particular Requirements for Electrical Heat
Pumps, Air-Conditioners and Dehumidifiers, which defines
safe design and use strategies for equipment using A2L
refrigerants. This standard limits the refrigerant
concentration in a space in the event of a refrigerant leak.
To meet the requirements, the UL standard defines
minimum room area, refrigerant charge limit, minimum
circulation airflow and/or ventilation airflow requirements,
and limits the use of ignition sources in spaces. The
standard may require a unit refrigerant leak detection
system.
For equipment with R-454B and charge amounts less than
or equal to 3.91 lbs per circuit, this UL standard does not
prescribe a room area limit and does not require a
refrigerant leak detection system or any circulation airflow
or ventilation airflow mitigation strategies. However, ignition
sources in ductwork must be evaluated.
Depending on the application, a specific requirement of
ANSI/ASHRAE Standard 15, Safety Standard for
Refrigeration Systems, could be more stringent than UL
60335-2-40 requirements. See Refrigeration Systems and
Machinery Rooms Application Considerations for
Compliance with ASHRAE® Standard 15-2022 Application
Engineering Manual (APP-APM001*-EN) for more
information.

Ignition Sources in Ductwork

Do not install open flames in the ductwork. Hot surfaces
exceeding 700°C (1290°F) should not be installed in the
ductwork unless the average airflow velocity is not less
than 1.0 m\s (200 ft\min) across the heater and proof of
airflow is verified before system is energized.
Electric heaters can exceed the surface temperature limit if
airflow distribution is poor, or insufficient airflow is provided
over the heater.
Surface temperatures of most gas heaters do not exceed
the surface temperature limits due to ANSI construction
requirements.

Ignition Sources in Unit

This UL-listed unit does not contain any ignition sources.
All potential ignition sources, (including factory or field
installed accessory electric heaters, gas heaters, relays,
and contactors) were evaluated during product UL listing.
A2L Information
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