Daikin WGZ030DW Installation, Operation And Maintenance Manual page 58

Chiller Mode - Applies to Integer 17 and Integer 19. Network
Chiller Mode Set Point and Active Chiller Mode use the same
numbering scheme to represent ice mode or cool mode.
The output representing the mode is shown below for each
protocol.
Mode LONworks
Heat 1
Cool 3
Ice 11
Any time the chiller is not in Ice mode, Cool mode will be
assumed.
LON Chiller Run Mode - Applies to Integer 18. The LON
Chiller Run Mode parameter indicates the unit state as:
State LONworks
Off 0
Run 2
Service 4
State = Off any time the state is not Run or Service
State = Run when the unit state is Auto
State = Service when the unit is in Test mode
Unit Identification - Integer 28 indicates the unit model type
and refrigerant. For WGZD with R410A and TGZ with R134a,
the refrigerant output is 3.
Integer 29 indicates the unit language. For the WGZD the
language can only be English, so output is 1.
Integer 30 indicates the software version and revision. The
hundreds digit represents the version, and the remaining part
represents the revision letter.
Compressor Select
Compressor Select is used to select the compressor for which
the associated parameters will be sent to the BAS interface.
The input should equal the number of the compressors for
the desired data. If 0 is sent from the BAS, this will also select
compressor 1.
Timeclock Setting
The chiller time and date may be changed through the BAS
interface. Time and date are updated by first setting the values
for the time and date inputs on the BAS. When the BAS sets
digital index 12 high, the time and date in the controller is set
to the values supplied bythe BAS. The values used are as
follows:
Year: Integer # 35 (00 to 99)
Month: Integer # 36 (1 to 12)
Day of Month: Integer # 37 (1 to 31)
Day of Week: Integer # 38 (1 to 7)
Hour: Integer # 39 (0 to 23)
Minute: Integer # 40 (0 to 59)
IOM 1322-1 • WATER-COOLED SCROLL COMPRESSOR
BACnet Modbus
3 3
2 2
1 1
BACnet Modbus
1 1
3 3
5 5
Unit Controller Operation
Network Defaults
The network set point default values are used only for the
LONworks protocol. Digital index 10 determines whether the
network defaults should be loaded at startup. The startup
process is as follows.
Immediately after the controller powers up, the protocol is
checked. If the protocol is LONworks, then the current status of
the BAS unit enable set point, digital 1, is stored in a temporary
location and the BAS enabled set point is set to disable. A ten
second timer should lapse, then the "ignore network defaults"
setting is checked. If this is set low, then the defaults for BAS
cool set point, network limit, unit enable, and unit mode will be
loaded. If the setting is set high, then no defaults are loaded
and the status of the BAS enable set point is restored to the
original value.
Other Digital Output Parameters
Type Index I/O Description
Chiller enable
D 2 O
Active alarm
D 3 O
indicator
Chiller run
D 4 O
enabled
Chiller local
D 5 O
D 6 O
capacity limited
D 7 O Evap flow
D 8 O Cond flow
More information on the BAS installation and operation can be
found in manuals shipped with the unit and also available on
www.DaikinApplied.com:
Compressor Motor Protection Module
The 20, 26, and 30 HP compressors are equipped with an
module that provides protection against:
• High motor temperature
• High scroll temperature
• Phase missing
• Phase reversal
• Low control circuit voltage
The module also has a LED display in the upper righthand
corner that gives information on compressor operation.
The module is accessible by removing the compressor motor
cover. Additional information can be downloaded by authorized
service technicians using special equipment.
58
Details
Set whenever the
chiller is enabled by all
status
settings and switches
Set when any alarm is
active. Active events
do not set this output
Set when the unit state
is auto
Set when the unit
control source is set to
control
keypad or switches.
Set when a unit
capacity limit is active,
Chiller
any circuit is disabled,
or any circuit is limited
in capacity.
Set when evap flow
switch is closed
Set when cond flow
switch is closed and
watercooled = yes
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