Prem-I-Air EH0530 Instruction Manual page 11

3. Drilling the Wall
Please note: If you are drilling the hole above ground floor level, please
ensure that the outside area is supervised until drilling has been
completed.
1) INTAKE AND OUTLET HOLES
This operation should be
carried out using the proper
tools (diamond tip or core bit
drills with high twisting torque
and adjustable rotation speed)
Fasten the template to the wall
taking care to check the
distance from the floor and or
ceiling and keep horizontal by
using a spirit level.
Use a pilot drill to mark the
centre of each core hole to be drilled. Use a core boring head having a
diameter of 135mm to drill the two holes for intake and outlet air
It is recommended that the holes must have a slight downward inclination of
3-5 degrees to prevent any backflow of water from the pipes.
2) DRAINAGE
The unit produces condensate that has to be extracted to enable the unit to
operate correctly. It is necessary to drill a hole through the wall measuring
30mm in diameter in the position shown in the template.
It is recommended that the holes are drilled with a slight downward
inclination of 3-5 degrees to prevent any backflow of water and make
drainage easier.
For this reason, it is essential for the drain line to have a minimum
downward inclination of at least 3% throughout its length.
3) FASTENING THE BRACKET
Drill the holes for
anchoring the fastening
bracket to the wall using
the 6 holes showed in
black on the template. If
the wall is not sturdy
enough it is advisable to use extra anchor bolts using the holes showed in
grey on the template
The anchor bolts provided require 8mm holes; the wall should be inspected
to determine if provided bolts are sufficient. No liability can bee accepted by
the manufacturer or his agent in case of underestimation of the structural
consistency of the anchorage made at the time of installation.
Page 11