Daikin Magnitude WME Series, Инструкция по установке, эксплуатации и обслуживанию

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IOM 1266-2 • MAGNITUDE
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MODEL WME CHILLERS 44 www.DaikinApplied.com
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Figure 60: Settings View - Interface
Table 22: Unit Interface Settings
Description Default Range PW Comments
BAS Network Protocol NONE
NONE, MODBUS,
LONWORKS, BACnet IP, ,
BACnet MS/TP
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NONE: No BAS network
MODBUS: RTU - RS485
LONWORKS: LONtalk - FTT-10A
BACnet IP: IP - Ethernet
BACnet MS/TP: RS485
NOTE: It is likely that the chiller will contain the factory settings for date and time; therefore, it is important to verify or change these settings
when the chiller is first used on the jobsite. Failure to do so will result in incorrectly labeled History files.
The version numbers shown towards the bottom left of the screen are the controllers’ software identification. These numbers may be
required by Daikin Applied to answer questions about unit operation or to assist in possible future upgrades of software.
Compressor Capacity Control
Compressor capacity is determined by the status of the leaving
chilled water temperature (LWT), which is a direct indicator
of whether the chiller is producing enough cooling to satisfy
the cooling load. The LWT is compared to the active chilled
water setpoint, and compressor loading or unloading ensues,
considering any capacity overrides that may be in effect.
Capacity Overrides
The conditions described in the following subparagraphs
override normal capacity control. Of the following limits, the
one creating the lowest capacity limit is in effect.
Low Evaporator Pressure
If the evaporator pressure approaches within 2 psi above the
Low Evaporator Pressure setpoint, the unit will inhibit capacity
increases. If the evaporator pressure approaches within 1 psi
above the Low Evaporator Pressure setpoint, the unit may
unload if chiller conditions necessitate it.
High Motor Temperature
If the highest motor stator temperature is above the limit, the
unit will adjust capacity to keep the temperature within the
limits.
Demand Limit
The maximum amp draw of the compressor(s) can be limited
by a 4 to 20 mA signal on the Demand Limit analog input. This
function is only enabled if the Demand Limit Enable setpoint
is set to ON. The amp limit decreases linearly from the 100%
Limit (at 4 mA) to the Minimum Amp Limit setpoint (at 20 mA).
While this override is in effect, chiller capacity is continuously
adjusted to keep the % RLA near the requested demand limit.
Network Limit
The maximum amp draw of the compressor(s) can be limited
by a value sent through a BAS network connection and stored
in the Network Limit variable. While this override is in effect,
chiller capacity is continuously adjusted to keep the % RLA
near the requested demand limit.
Maximum Amp Limit
The maximum amp draw of the compressor(s) is always limited
by the Maximum Amps setpoint. This limit has priority over all
other functions including manual capacity control. While this
override is in effect, chiller capacity is continuously adjusted to
keep the % RLA near the limit value.