184
JOHNSON CONTROLS
FORM 201.21-NM1 (616)
LOAD LIMITING CONTROL (CON'T)
VSD Baseplate Temperature Load Limiting
VSD Baseplate load limiting helps protect the unit
from tripping on the high VSD Baseplate Temp Safety.
A system is permitted to load normally as long as the
VSD Baseplate temperature is below the VSD Baseplate
Temperature Cutout – 8°F. Between the VSD Baseplate
Temperature Cutout –8°F and the VSD Baseplate Tem-
perature Cutout – 4°F, loading is inhibited, even though
increased loading is required. Between the VSD Base-
plate Temperature Cutout – 4°F and the cutout, forced
unloading is performed every 2 seconds according to
TABLE 10 below:
TABLE 10 - VSD BASEPLATE TEMPERATURE
LOAD LIMITING/UNLOADING
VSD BASEPLATE TEMPERATURE UN-
LOADING
Baseplate Temp. is between
Cutout- 8ºF
&
Cutout- 4ºF
0 Hz
Baseplate Temp. Cutout- 3.6ºF 1 Hz
Baseplate Temp. Cutout- 3.2ºF 2 Hz
Baseplate Temp. Cutout- 2.8ºF 3 Hz
Baseplate Temp. Cutout- 2.4ºF 4 Hz
Baseplate Temp. Cutout- 2.0ºF 5 Hz
Baseplate Temp. Cutout- 1.6ºF 6 Hz
Baseplate Temp. Cutout- 1.2ºF 7 Hz
Baseplate Temp. Cutout- 0.8ºF 8 Hz
Baseplate Temp. Cutout- 0.4ºF 9 Hz
Baseplate Temp. Cutout 10 Hz
OPERATION
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