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4.2 Preparing the wall for installation
Before installing the product, check that the chosen position is suitable (Section 3.0),
adequate installation clearances are available (Section 2.2) and that the requirements for
flue terminal position (Section 2.3), are satisfied.
The wall structure intended for the KD NAVIEN appliance must be of suitable construction, load
bearing and have a flat surface.
If you are in doubt that the wall is capable of adequately supporting the weight of the
appliance and any ancillary equipment you MUST arrange for an assessment of structural
strength by a competent person. Stud / partition walls are NOT suitable
4.2.1 Fitting the wall mounting template.
1) Tape the paper template to the wall, ensure it is square.
2) Mark positions of four fixing holes as close as possible to the corners of the plate in the top
and bottom rows in secure positions on the wall, see diagram 4.1
3) Mark the position of the flue hole.
Horizontal flue – Take into account a 3° slope downwards in the flue to the boiler.
4) Remove the template from the wall.
5) Cut the flue hole, preferably with a core-boring tool.
Ensure that during the cutting operation, masonry falling outside of the building does not
cause damage or personal injury.
6) It is absolutely essential that the KD NAVIEN appliance is installed vertically. If the wall is
bowed or not plum, then spacers must be inserted between the back plate and the wall such
that the back plate is accurately vertical.
Navien stirling engine m-CHP installation manual
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