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WARNING
Refrigerant leak risks
• If refrigerant gas leaks during installation, ventilate the room and do not use the furnace
until a technician confirms that it is safe to use the furnace.
– If the refrigerant gas comes into contact with a flame, poisonous gases will be
released. If the odor is detected, contact a dealer, contractor or technician regarding
the appropriate measures to prevent the safety limit from being exceeded.
• After completing installation work, make sure that refrigerant gas is not leaking.
– If the refrigerant gas leaks and is exposed to a fan heater, stove, oven, or another
heat source, it may generate noxious gases.
• Do not use refrigerant other than R410A.
– Doing so may cause the unit or pipes to burst, or result in an explosion during use,
repair, or at the time of disposal of the unit.
– Doing so may also be in violation of applicable laws.
– The manufacturer, Mitsubishi Electric Corporation, its affiliates and suppliers, cannot
be held responsible for malfunctions or accidents resulting from the wrong type of
refrigerant used.
• When the outdoor unit stop valve is left closed after installation / service, or when
the outdoor unit stop valve is closed due to operation stop, the volume of the liquid
refrigerant in the refrigerant piping expands due to the heating operation in the gas
furnace, causing coil or local extension piping to rupture.
Specifications are subject to change without notice.
PAA-A18, 24, 30, 36, 42AA1/BA1/CA1
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© 2022 Mitsubishi Electric US, Inc.
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