Derating For Low Air Pressure - Trane TR200 Instruction Manual

Specifications

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
max. output current (I ) should be derated in ac-
out
cordance with the shown diagram.
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 - 3.3 K), 91% of the rated output current is available. At a temperature of 41.7° C, 100% of the
AMB, MAX
rated output current is available.
Derating of output current versus altitude at T
8-12
) or
AMB
Figure 8. 1: Derating of output current versus altitude
at T
AMB, MAX
above 2 km, please contact Trane regarding PELV.
for frame sizes D, E and F.
AMB, MAX
for frame sizes A, B and C. At altitudes
BAS-SVX19C-EN