York YCAV0267E, Installation Operation & Maintenance

Page: 233 / 350

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JOHNSON CONTROLS
FORM 201.21-NM3 (616)
SOUND LIMIT CONTROL (CON'T)
(LOCAL AND REMOTE RESET CONTROL)
0 – 10 VDC Reset Input
A 0 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 = min VSD freq). The
sound limit is ramped linearly between these limits as
the input varies between 0 VDC and 10 VDC. In order
for this input to work properly, the Remote Sound Limit
must be programmed for 0 – 10 VDC input (OPTIONS
key) and Chiller Control Board jumper JP6 placed in
the “V” position.
2 – 10 VDC Reset Input
A 0 - 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 = min VSD freq).
The sound limit reset is ramped linearly between these
limits as the input varies between 2 VDC and 10 VDC.
In order for this input to work properly, the Remote
Sound Limit must be programmed for 2 – 10 VDC input
(OPTIONS key) and Chiller Control Board jumper JP6
placed in the “V” position.
0 – 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 = 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 – 20 mA input (OPTIONS
key) and Chiller Control Board jumper JP6 placed in
the “mA” position.
4 – 20 mA Reset Input
A 0 - 4 mA signal produces a 0% sound limit (no change
to max VSD freq). A 20 mA signal produces a100%
sound limit (max VSD freq = min VSD freq). The sound
limit reset is ramped linearly between these limits as
the input varies between 4 mA and 20 mA. In order for
this input to work properly, the Remote Sound Limit
must be programmed for 4 – 20 mA input (OPTIONS
key) and Chiller Control Board jumper JP6 placed in
the “mA” position.
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