Immergas BASIC MAGIS PRO Instructions And Warnings page 78

As a first step, connect the refrigeration line of the outdoor unit
as shown in Fig. 20.
Use the hoses present in the accessories box identified with the
letters LP and GP.
Using a torque wrench, tighten the nuts (1 and 2) with a tightening
torque as indicated in the booklet of the outdoor unit.
78
As regards the connection of the refrigeration line, it is necessary
to comply with all the instructions contained in the instruction
booklet of the external condensing unit.
N.B.: It is suggested to apply thermal insulation on the entire
length of the pipes and on the connection fittings in order to reduce
the formation of condensation in summer operation.
G
GP
1
20
2
LP