JOHNSON CONTROLS
218
FORM 201.23-NM2
ISSUE DATE: 09/25/2020
SECTION 7 - OPERATION
2 VDC through 10 VDC Reset Input
A 0 VDC through 2 VDC signal produces a 0% sound
limit (no change to max VSD freq). A 10 VDC signal
produces a 100% sound limit (max VSD freq equals
min VSD freq). The sound limit reset is ramped linearly
between these limits as the input varies between 2VDC
and 10 VDC. In order for this input to work properly,
the Remote Sound Limit must be programmed for 2
VDC through 10 VDC input (OPTIONS key) and
Chiller Control Board jumper JP6 placed in the “V”
position.
0 mA through 20 mA Reset Input
A 0 mA signal produces a 0% sound limit (no change
to max VSD freq). A 20 mA signal produces a 100%
sound limit (max VSD freq equals min VSD freq).
The sound limit reset is ramped linearly between these
limits as the input varies between 0 mA and 20 mA.
In order for this input to work properly, the Remote
Sound Limit must be programmed for 0 mA through 20
mA input (OPTIONS key) and Chiller Control Board
jumper JP6 placed in the “mA” position.
4 mA through 20 mA Reset Input
A 0 mA through 4 mA signal produces a 0% sound lim-
it (no change to max VSD freq). A 20 mA signal pro-
duces a100% sound limit (max VSD freq equals min
VSD freq). The sound limit reset is ramped linearly
between these limits as the input varies between 4mA
and 20 mA. In order for this input to work properly, the
Remote Sound Limit must be programmed for 4 mA
through 20 mA input (OPTIONS key) and Chiller Con-
trol Board jumper JP6 placed in the “mA” position.
To Next Page
Loading...
