Trane TR200 - Derating for Low Air Pressure

Derating for Low Air Pressure
The cooling capability of air is decreased at lower air
pressure.
Below 1000 m altitude no derating is necessary but
above 1000 m the ambient temperature (T
AMB
) or
max. output current (I
out
) should be derated in ac-
cordance with the shown diagram.
Figure 8. 1: Derating of output current versus altitude
at T
AMB, MAX
for frame sizes A, B and C. At altitudes
above 2 km, please contact Trane regarding PELV.
An alternative is to lower the ambient temperature at high altitudes and thereby ensure 100% output current at
high altitudes. As an example of how to read the graph, the situation at 2 km is elaborated. At a temperature of
45° C (T
AMB, MAX
- 3.3 K), 91% of the rated output current is available. At a temperature of 41.7° C, 100% of the
rated output current is available.
Derating of output current versus altitude at T
AMB, MAX
for frame sizes D, E and F.
Specifications
8-12 BAS-SVX19C-EN