360
FORM 160.54-M1
ISSUE DATE: 10/25/2019
SECTION 36 - SOFTWARE ENHANCEMENTS
JCI COMPANY CONFIDENTIAL
JOHNSON CONTROLS
• When motor current less than or equal to 80%
FLA - No Limiting
• When motor current more than 80% FLA and less
than or equal to 98% FLA - Increase 0.1Hz every
{2 + (% FLA - 80)} seconds
• When motor current more than 98% FLA - In-
crease 0.1Hz every 20 seconds
Although the incremental frequency increases can be
less than allowed, they will never be greater than al-
lowed. These limitations also apply to the frequency
ramp that occurs at chiller start while ramping from start
frequency 30Hz (60Hz applications) or 25Hz (50Hz ap-
plications) to maximum frequency. These limitations are
not imposed in manual frequency Control.
Surge Detection and Reaction During Chiller Start -
The surge detection and reaction routine is now dis-
abled until five seconds after the start frequency (25Hz
for 50Hz applications/30Hz for 60Hz applications) is
achieved, which prevents false or transient surge con-
ditions from being logged or reacted to.
Extended Condenser Temperature Range
Certain applications must operate at higher condenser
temperatures. The maximum allowable condenser tem-
perature is increased from 116°F to 128°F. The result-
ing higher operating pressures require higher warning
and safety shutdown thresholds than are in previous
software versions.
To use this software in the standard and the higher tem-
perature applications, a condenser temperature range
setpoint was added to the SETUP screen as shown in
OptiView Control Panel – Operation (Form 160.54-
O1) FIGURE 44
to allow selection of standard (default)
or extended, which is set at the factory and requires an
ADMIN password to change it. It is only visible when
set to extended.
When set to standard, the following warning and safety
shutdown thresholds are unchanged. When set to ex-
tended, they are as follows:
•
Warning – High Pressure Limit –
Maximum al-
lowable value is 193.0 psig, with no change to the
default value.
•
Condenser – High Pressure –
Trip/Reset thresh-
old is 200/140 psig.
•
Condenser – High Pressure – Stopped –
Trip/
Reset threshold is 170 psig.
To accommodate the higher temperatures, these chill-
ers will be equipped with a different High Pressure
Cutout Switch (HPCO) that can be set to trip at a high-
er pressure.
VGD Setpoint Defaulting Correction
In previous software versions, the PRV-VGD inhib-
it setpoint (40% to 100%) would reset to its default
value (95%) upon power-up following a power failure.
This software version correctly maintains the last pro-
grammed value.
Refrigerant Level Control
The level control setpoint default was changed from
30% to 50%.
Trend Setup Screen
This software version fixed a problem that prevents the
Y-Axis maximum allowed display values in all six data
points to be set in metric mode.
Program card Downloading
Although the procedure has not changed, the program
downloading was modified to reduce the download
time.
Medium Voltage Variable Speed Drive –
Variable Maximum Values
The following MVVSD variables are now allowed to
be a maximum value of 65,535:
• MVVSD Bus Voltage
• MVVSD Output Current (3 phases)
• MVVSD Input Voltage
• MVVSD Output Voltage
SI0201 - SOFTWARE ENHANCEMENTS (VER 19) EFFECTIVE OCTOBER 2008 (CONT'D)
