Veltron ZHQ2070-TR Manuel D'instructions page 16

Step 5: Pull the power cord gently out of the base as much as
possible. Fix the power cord under the base using the supplied
4 pcs of M4 nuts
Step 6: Fix the heater on the floor. Bore three holes in the floor,
fix the heater by three wedge bolts on the floor tightening the
screws by spanner.
Complete!
Operation

Place the heater on a firm, level surface and plug into a grounded
220-240V 50-60Hz power outlet. Only operate the heater when it
is in the upright position and the base is attached.

Electric carbon patio heater is equipped with 3 heating settings:
Low, Medium and High.
1. Turn the switch to "1", it means the heater is working and on the
minimum heating position (900W).
2. Turn the switch to "2", it means the heater is working and on the
medium heating position (1200W).
3. Turn the switch to "3", it means the heater is working and on the
maximum heating position (2100W).
4. Turn the switch to "OFF", the heater is in off mode.