Dometic COOLAIR RTX1000 Guide Pour L'installation page 6

Construction requirements
The angle of the installation area must be observed.
The defined values apply to a vertically and horizontally
aligned unit. Larger tilt angles may cause damage to the
compressor. Where appropriate, the tilt of the unit can
be adjusted with spacer sleeves.
RTX1000
maximum 8° (to the front)
RTX2000
maximum 20° (to the front)
q
3 RTX1000 / RTX2000 Uni2 and RTX1000 / RTX2000 Uni3
≥ 1.6 in. (40 mm)
q
6
Parking Cooler
EN