Trane 4TXM2318BF300AA Service Manual page 88

7) Set the unit on mounting brackets or pad. To avoid the adverse effects of snow, ice and defrosting issues, install
the unit on heat pump risers to ensure a sufficient height from the ground. In all cases, refer to local code for correct
riser height.
Make sure the outdoor unit is installed level and is stable.
Install snow protection hood as necessary.
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