Wall Mounted
Indoor Unit
Wall Mounted
Indoor Unit
Wall Mounted
Indoor Unit
Wall Mounted
Indoor Unit
Wall Mounted
Indoor Unit
Only one of the 15 Series multi-split outdoor units is able to support up to five indoor units. The figure
below illustrates that multiple indoor high wall units may be used on a single M4THM15 multi port system,
provided the combination is approved. Please reference the multi-zone approved combinations matrix on
page 8.
Indoor Unit Model Capacity Outdoor Unit
High Wall Mounted
M4MHW1509A1N 9K Btu/h
M4THM1518A12N
M4THM1524A13N
M4THM1530A14N
M4THM1536A14N
M4THM1542A15N
M4MHW1512A1N 12K Btu/h
M4MHW1518A1N 18K Btu/h
M4MHW1524A1N 24K Btu/h
When the total capacity of the indoor units exceeds the total capacity of the outdoor unit, the system will be
restricted by the capacity of the outdoor unit. All indoor units would not be able to operate at full capacity
at the same time. If the indoor unit combined capacity is less than 100% of the outdoor units' capacity, the
system capacity is limited to the indoor unit(s) combined capacity.
Operating Ranges
Cooling Operating Range Outdoor Temperature 0 - 118°F (-18.0 - 48°C)
Heating Operating Range Outdoor Temperature 5 - 75°F (-15 - 24°C)
Combinations for Outdoor and Indoor Units
9
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