Thermador An American Icon Professional PRO-GRAND PRD30 Manuel D'installation page 22

Griddle Tilt Adjustment (Not on all models)
Check the griddle adjustment by pouring two tablespoons
of water on the back of the griddle plate. The water should
slowly roll into the grease tray. If not, adjust the two (2)
CABINET
CABINET
English 20
CAUTION:
CORRECT! — Leveling legs should be adjusted so that the range
sides are at the same or higher level as the adjacent cabinet.
Each Leveling Leg can be adjusted using a 3/8" socket or wrench
on the top of the leg, or using an adjustable wrench on the flats on
the sides of the foot.
screws under the back of the griddle plate. Start with one
half turn counter-clockwise (CCW) of the screws. Further
adjustment should be made by one-quarter turn until water
slowly flows into the grease tray.
RANGE
RANGE
CABINET
CABINET
Figure 15: Adjusting the Height of the Range