180
JOHNSON CONTROLS
FORM 201.21-NM4 (616)
180
JOHNSON CONTROLS
OPERATION
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