Mitsubishi Electric MVZ-A12 Manuel D'installation page 16

The unit can be installed on a platform or suspended from rails as
shown below. The rails must run the length of the unit and be of
ductwork. Vibration isolation is recommended for horizontal
installations. Some jurisdictions may require an auxiliary drain pan
be mounted under the unit. Always follow local or national code
requirements.
16
month.
The pressure drop is to be determined by the installing contractor
based on the overall static pressure performance of the system
including supply and return ductwork sizing. The factory static
esp. is available. See instructions for changing to 0.30 or 0.80 esp in
the electrical section (13.4.).
AUXILLARY
DRAIN PAN
FILTER