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Sound Limit Setpoint
PROGRAM
◄DEF XXXXX LO XXXXX HI XXXXX
SOUND LIMIT SETPOINT
The sound limit setpoint is programmable from 0 – 100
% with a 0% default. 0% allows operating up to the
full speed capability of the unit with no sound limiting.
Typically the sound limit control setting will be pro-
grammed for 0 % unless sound limiting is utilized on the
chiller. Sound limiting will only permit the unit to run
to a frequency less than the maximum speed capability
of the unit. Programming a value of 1% would be the
minimum sound limiting that can be programmed and
100% will be the maximum. 100% will only allow the
unit speed to operate at the minimum frequency. Usu-
ally, the sound limit % will be programmed somewhere
between 0 and 100% according the limiting needed to
satisfy the sound requirements of the site. Typically,
sound limiting will be utilized in areas sensitive to noise
during night-time hours. The sound limit display will
only be present if the sound limit option is programmed
at the factory.
TABLE 17 - PROGRAMMABLE OPERATING PARAMETERS
PROGRAM VALUE
Suction Pressure Cutout
Low Ambient Temp. Cutout
Leaving Chilled Liquid Temp. Cutout
Motor Current Limit
Pulldown Motor Current Limit
Pulldown Motor Current Limit Time
Suction Superheat Setpoint
Unit ID Number
Sound Limit Setpoint
JOHNSON CONTROLS
PROGRAM KEY (CON'T)
= XXX %
MODE
Water
Cooling
Glycol
Cooling
-
Water
Cooling
Glycol
Cooling
-
-
-
-
-
Sound Limit
Option Enabled
Default Values
A listing of the low limits, high limits, and default values
for each of the programmable values is noted in each
display and can be found in TABLE 17. Note that the
Imperial units are exact values while the Metric units
are only approximate.
LOW LIMIT
HIGH LIMIT
24.0 PSIG
36.0 PSIG
1.65 Bars
2.48 Bars
5.0 PSIG
36.0 PSIG
0.34 Bars
2.48 Bars
-2°F
50.0°F
-18.9°C
10.0°C
-
-
11.0°F
36.0°F
-11.7°C
2.2°C
30%
103%
30%
100%
0 Min
255 Min
8.0°F
12.0°F
4.4°C
6.6°C
0
0%
100%
FORM 201.21-NM1 (1223)
DEFAULT
24.0 PSIG
1.65 Bars
24.0 PSIG
1.65 Bars
25.0°F
2.2°C
-
36.0°F
-
2.2°C
36.0°F
2.2°C
103%
100%
0 Min
10.0°F
5.6°C
7
0
0%
249
8
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