JOHNSON CONTROLS
38
FORM 155.21-O1 (615)
SETPOINTS SCREEN
Overview
This screen provides a convenient location for pro-
gramming the most common setpoints involved in the
chiller control. This screen also serves as a gateway to
the Diagnostics screen for service troubleshooting.
Display Only
Operational Setpoints
Displays the operational setpoints.
Pulldown Setpoints
Displays the pulldown setpoints.
Programmable
Operational Setpoints
Access Level required:
SERVICE
Short Dilution Cycle Setpoint
Access Level required:
SERVICE
This setpoint defines the criteria to perform a dilution
cycle. When the value set to OFF is to keep constant
dilution cycle length (6 minutes) and it does NOT use
the 2SOL valve to dilute the solution. When the value is
set to ON considers the strong solution concentration to
define the length of the dilution cycle and also opens the
2SOL valve to help shorten the dilution cycle. When this
setpoint is set as OFF, the unit will perform a 6 minute
dilution cycle. If this setpoint is set ON, the unit will
perform a short dilution cycle, the dilution cycle depends
on the strong solution concentration and uses the ranges
provided in the following table.
Concentration
Pumps work
During
2SOL Valve
opens during
below 57%
N/A
N/A
57% - 59%
70 Seconds
50 Seconds
59% - 61%
110 Seconds
90 Seconds
61% - 63%
170 Seconds
150 Seconds
63% - 65%
200 Seconds
180 Seconds
above 65%
230 Seconds
210 Seconds
Range: ON / OFF
Default: ON
LD13818
FIGURE 12 - SETPOINTS SCREEN
OptiView Control Center
