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CCN Enable/Disable — Press
control of the chiller. This function will override CCN control
commands. The CCN Enable value under
ON to activate this function. With CCN Enable set to ON and
Disable CCN Control set to "0," the chiller will function nor-
mally under CCN control. With Disable CCN Control set to
"1," the chiller will operate in a local mode under its own
control.
Reading and Changing Set Points — Table 21 shows how
to read and change the chilled fluid set point. Other set points
can be changed by following the same procedure. Refer to
Table 20 for the sequence of display of set points in each
subfunction.
Table 21 — Reading and Changing
Chilled Fluid Set Point
KEYPAD
DISPLAY
COOLING
Cool Setpoint 1
44.0 F default
Cool Setpoint 1
ENTER
48.0 F
SERVICE FUNCTION — This function allows the techni-
cian to view and input configuration data. Factory configura-
tion data, field configuration data, and service configuration
data may be viewed or entered through the keypad and display
module. See Table 22 for a complete listing of configurable
items. Whenever a processor module is replaced in the field,
the complete list of configuration codes should be checked for
correct settings. The current software version can be displayed.
See Table 23.
Scroll down in this function to display configuration infor-
mation including number of compressors, tonnage, and com-
pressor must-trip amps.
Password Protection of HSIO Configurable Service
Points — To modify configurations and values and to use the
manual control subfunction, the password must be entered be-
fore the first change can be made. The default password is set
to
. See Table 24 for an example of how to en-
ter the password to change the Lead/Lag configuration.
Options Configuration Tables 1 and 2 — These subfunc-
tions can be accessed by pressing
ing down to display the configuration options. See Table 22 for
a complete list of these options.
Temperature Reset, Demand Limit and Head Pressure PID
Configurations — Press
configuration information. See Table 22 for a complete list.
Factory Configuration Codes — Pressing
entry into the factory and service configuration codes subfunc-
tion. Under this subfunction, there are 5 configuration codes
that are downloaded at the factory. Each code is made up of 8
digits. If the processor module is replaced in the field, these 5
configuration codes should be checked using the keypad and
HSIO display module. See Table 25 for a description of the
factory configuration codes (codes 1 through 3) and service
configuration codes (codes 4 and 5).
The factory and service configuration codes are found by
pressing
. These are preset from the factory. They can
be verified by following the description in Table 23. These
codes MUST be checked and corrected in the field if the
PSIO-1 module is replaced.
to disable the CCN
must be
COMMENTS
Change set point from
default to 48 F.
Set point change
complete
or
and scroll-
and scroll down to view the
allows
NOTE: The LOCAL/OFF/REMOTE switch must be in the
OFF position to change configuration codes.
A label is applied to a control box panel with a list of factory
and service codes for particular units. Table 26 shows
how to configure a new PSIO-1 module for use in a
30HXC106---530CA water cooled chiller.
Transducer Calibration — Press
view the transducer calibration information. See Table 22 for a
complete list, and the Pressure Transducers section on page 61
for a description of this subfunction.
Manual Control Mode — This control allows the user to have
full control over the compressors, loaders, and the minimum
load valve (if installed) of the machine. Normal safeties such
as high pressure, oil level and pressure, and CPM related
alarms are NOT bypassed in this control mode. The capacity
control function and overrides ARE bypassed when using the
manual control mode. To enter this mode, switch the LOR
switch to OFF. Press
read Manual Control Enable - Disable. Press
switch the LOR switch to Local. The display will change to
Manual Control Enable - Enable. The Disable and Enable will
appear on the second line of the display. See Table 22 for a
complete list of this function.
Scroll down and press
pressor. The control will start the compressor if the pre-lube cy-
cle is passed, just as in normal operation. Press
loaders as desired and press
compressors. The Minimum Load Valve can be energized us-
ing the same procedure.
Dual Chiller Configuration — Press
Dual Chiller control configuration. This method of control is
for a stand-alone Master/Slave combination of chillers and will
NOT work with the Flotronic™ System Manager (FSM) or
Chillervisor™ System Manager (CSM). The Minus One Pass
Cooler option is required for this configuration.
The chillers should be piped for series flow through the
coolers. The Master chiller must be downstream from the Slave
chiller leaving water. Both the Master and Slave chiller must be
connected to the same CCN Level II communications bus with
different addresses. To enable the dual chiller configuration the
CCN Enable function
chiller, otherwise each chiller will operate independently. This
value can be activated through the HSIO or through a CCN de-
vice. Both chillers should be configured for Close Control
and require flow switches to be installed. For cooler
pump control, wire both Master and Slave chiller outputs to the
cooler pump starter. All system inputs (temperature reset, de-
mand limit, dual set point, etc.) should be connected to the
Master chiller. If Lead/Lag Balance is disabled, the Master
chiller will always be the lead chiller. If Lead/Lag Balance is
enabled, the control will alternate between the Master and
Slave chillers to keep their respective run hours balanced with-
in the value configured for Lead/Lag Balance Delta. The de-
sired leaving fluid set point
must be configured in the Master chiller. CCN Control of the
chillers can be disabled locally through the HSIO by entering
and enabling the Disable CCN Control value. This
value must be disabled before the chiller will return to Duplex
control.
32
and scroll down to
at the HSIO. The display will
and
ENTER
to start the desired com-
ENTER
to add
ENTER
to turn off loaders and
ENTER
to enter the
must be set to Enable for each
for the Duplex chiller
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Troubleshooting
