Carrier AiroVision 39 HQ, Assembly/Installation, Commissioning, Maintenance Manual

Page: 25 / 52

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Fig. 49. Negative pressure siphon
Fig. 51. U-folded negative pressure siphon
Fig. 52. Negative pressure siphon installation
Fig. 50.
Positive pressure siphon
P [Pa]: Negative pressures in the unit. Calculation
should be done without using (-) sign.
R [mm]: Distance from lower point of the pipe to
ground at condensation tray outlet.
There is no inconvenience if R value is set higher
than the value found by calculation.
Positive pressure siphon should be filled with water
before starting up the unit.
Negative pressure siphon may only be applicable for
negative drain.
Negative pressure siphon can be set up as in Figure
49.
In Figure 52, parts and assembly order of siphon are
given.
Only negative pressure siphon is delivered from the
factory. A positive pressure siphon should be made
using a U-bended pipe as shown in Fig. 50.
The ball inside the negative pressure siphon provides
drained water fill the siphon by preventing air suction.
This ball also blocks suction discharges that may be
produced during pressure shocks.
Water drain direction marked with an arrow on the
negative pressure siphon.
Application types according to the pressure and si-
phon types are shown in Fig. 53.
R= + 50
P
10
H1 ≥ (max positive pressure at cooling coil, Pa) / 10
+ 50 mm
H2: 50 mm
H1 = (max positive pressure at cooling coil, Pa) / 10
+ 50 mm
H2 ≥ 1/2 x H1
Install negative pressure siphon not supplied from
the factory according to Fig. 51.