Airwell HVVA-025N-01M22 Service Manual page 28

Note:
For the
HVVA-022~035N-01M22
directly.
But for
HVVA-070/050/045N-01M22
so first need to knock off the middle of the blocking piece and take it out to avoid noise when the unit is running.
Then install the drain pipe.
See from outside
See from outside
Step 4: Install the rubber plug on the left drain hole to the right drain hole to prevent water leakage.
indoor units the middle of the left drain is unblocked, can install the drain pipe
Unblocked
and
HVVA-090N-01M22
Knock off the middle of
the blocking piece by
screwdriver
Blocked
indoor untis the middle of the left drain is blocked,
264
Disassembe the unit
Take out the blocking piece