245
JOHNSON CONTROLS
FORM 201.21-NM4 (1020)
245
JOHNSON CONTROLS
8
Sound Limit Setpoint
PROGRAM ◄DEF XXXXX LO XXXXX HI XXXXX
SOUND LIMIT SETPOINT = XXX %
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.
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.
PROGRAM KEY (CON'T)
TABLE 17 - PROGRAMMABLE OPERATING PARAMETERS
PROGRAM VALUE
MODE
LOW LIMIT
HIGH LIMIT
DEFAULT
Suction Pressure Cutout
Water
Cooling
24.0 PSIG
36.0 PSIG
24.0 PSIG
1.65 Bars
2.48 Bars
1.65 Bars
Glycol
Cooling
5.0 PSIG
36.0 PSIG
24.0 PSIG
0.34 Bars
2.48 Bars
1.65 Bars
Low Ambient Temp. Cutout
-
-2°F
50.0°F
25.0°F
-18.9°C
10.0°C
2.2°C
Leaving Chilled Liquid Temp. Cutout
Water
Cooling
-
-
36.0°F
-
-
2.2°C
Glycol
Cooling
11.0°F
36.0°F
36.0°F
-11.7°C
2.2°C
2.2°C
Motor Current Limit
-
30%
103%
103%
Pulldown Motor Current Limit
-
30%
100%
100%
Pulldown Motor Current Limit Time
-
0 Min
255 Min
0 Min
Suction Superheat Setpoint
-
8.0°F
12.0°F
10.0°F
4.4°C
6.6°C
5.6°C
Unit ID Number
-
0
7
0
Sound Limit Setpoint
Sound Limit
Option Enabled
0%
100%
0%
