Willis WST12MC16S Service Manual page 65

Removal Procedure
Loosen the 2 screws,
3
in the right and the left,
which fix the Evaporator
Assy.
4 Widen the auxiliary
piping to the extent of
10°~20°.
Pull the heat exchanger
5
to the front side to undo
the hooks completely,
and then lift it.
Auxiliary piping
Heat exchanger
81