Gtech HEATWAVE Operating Manual page 7

Installation
Push the wall plugs into the holes.
WARNING: Do not attempt to install the heater if you have recently switched it on or until
it has cooled down.
Hook the bracket onto the screws...
Insert the screw but do not screw all the way
in. Leave the thickness of the wall bracket
between the screw head and the wall.
...and slide down to a secure position.
If the bracket is too loose then tighten the
screw a little further.
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