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7 - CHECKING BEFORE COMMISSIONING
7.3 Condensate drain connection
Models 90 to 320 (coil in U)
These units can optionally have an indoor condensate drain pan.
The pan has a drain tube of outer diameter of 22 mm to which a
PVC or transparent plastic tube must be connected for draining
the condensates.
This pan is standard in units with centrifugal fan (optional) (set
up a siphon).
Pan drain
(optional)
Models 360 to 600 (coil in V)
These units are equipped with two condensates pans located
in the lower part of the two coil sides.
These pans drains have a drain tube of outer diameter of 22 mm,
to which a PVC or transparent plastic tube must be attached
for the condensate draining that reaches the bottom of the unit.
Condensate
pans
Siphon installation norms
All water drain tubes must be provided with a siphon to avoid
bad smell and water spills.
Pan in overpressure:
● It's installed to avoid the access through the drain piping of bad
smells.
14
Pan in underpressure:
● Besides the above application, water must be suctioned from
the pan because of the depression with respect to the motorfan
assembly.
● Perform the siphon assembly as per the scheme of the
attached starting diagram:
- For the correct siphon design, the "A" height must be at
least twice that of the underpressure (mm.w.c) where the
condensate pan is placed.
- Check that the condensate outlet is not clogged.
- The drain piping must be slightly sloped to ease circulation
towards the drain.
- The original diameter of the piping must be respected. No
reduction can be made.
- In the case of units installed outdoors, with outdoor
temperatures which are lower than 0ºC the necessary
precautions must be taken to prevent the water in the drain
piping from freezing.
Condensates pan
in depression
Pan drains
Check the watertightness of the connection.
7.4 Checks in the axial fans
● Before commissioning, check the blade rotation direction and
that the axis turns without strokes nor vibrations.
● Once running, check the operation conditions: pressures,
fl ows and consumptions.
● With electronic fans (optional), check that they adapt their
rotational speed based on the condensation or evaporation
pressure.
Slight slope
5/1000
To drainage
Siphon drain
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