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3.3 Condensate drain piping of the indoor unit
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It is recommended to have a professional plumber prepare a
drain outlet having a 32 mm diameter rigid PVC tube near the
indoor unit, to which a flexible drain pipe for the drainage of
the indoor unit can be attached.
•
Install a siphon on the drain line near the unit as portrayed in
figure no. 6.
•
Plan in advance the path of the drain line with a downward
slope of at least 2% and a water trap (siphon) on the line in
order to prevent intake of air through the tube into the unit and
to facilitate the evacuation of condensate water from the unit.
•
The rigid drain tube end must be 50 mm lower than the bottom
of the unit.
Figure 6: Siphon on the drain
line
Plan in advance an easy access to the unit for servicing:
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The unit is accessible for servicing from its bottom only. Allow a minimum of 100 mm between the
wall and the air filters.
•
Height of the space required for installation is 100 mm minimum.
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Access for servicing to all the bottom area of the unit to the size of the service panel.
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Seal the space in which the unit is installed in order to prevent penetration of unconditioned air into
the return air. Also insulate with thermal insulation every partition bordering on an area that is not
air-conditioned.