www.DaikinApplied.com 49 IOM 1274-3 • CENTRIFUGAL WATER CHILLERS
Figure 55: Settings View - Motor
Table 15: Motor Setpoints
Description Default Range PW
Nominal Capacity 100 tons 0-2000 tons T Sets nominal capacity rating of an individual compressor for staging decisions.
40.0 °F 30 TO 60 °F M
Compressor Start: Sets minimum delta between oil sump temp and evaporator
saturated temp. Oil Heat Control: Sets ON control point @ evaporator LWT +
Setpoint + 10F or Sets OFF control point @ evaporator LWT + Setpoint + 20F
Soft Load Enable M
Initial Soft Load Limit 40% 10 TO 100% M Initial %RLA for soft load ramp up
Soft Load Ramp Time 5 min 1 TO 60 min M Time period for up to 100% from limit
Show Motor Temps No No, Yes T Setting for displaying motor temps on HMI screen
Max Leaving Water Temp Rate 0.5 °F/min 0.1 to 5.0 °F/min M Sets LWT rate above which capacity increase is inhibited
Min Leaving Water Temp Rate 0.1 °F/min 0.1 to 5.0 °F/min M Sets value below which an additional compressor can stage on.
Demand Limit Enable OFF ON, OFF M
ON: Limits %RLA to a value set by the Demand Limit analog input,
where: 4 mA = 70 %RLA
20 mA = 100 %RLA
OFF: The Demand Limit input is ignored.
Minimum Amps 39% 5 to 80% M Sets %RLA below which unloading is inhibited
Maximum Amps 100% 10 to 100% M
Sets %RLA above which capacity increase is inhibited. Unloading is forced at 5%
above this value.
VFD Enable No Yes M Sets if the motor is controlled by a VFD
10% 0 to 20% M
VFD Minimum Speed 55% 0 to 100% M Minimum that can be set is VFD Low Speed Limit
VFD Speed 10% 0 to 100% M Sets speed portion of Speed/Lift ratio setpoint where Speed is at 0 Lift.
Lift 90 °F 30 to 90 °F M Sets lift portion of Speed/Lift ratio setpoint where Lift is at 100% Speed.
Protocol Starter Local
Local, Remote,
MODBUS, D3, MX3,
Iso-Mtr-T MX_MV
T Communication protocol with compressor starters
Ident Number Starter 1 0-200 T
Baud Rate Starter 19200
1200, 2400, 48, 00,
9600, 19200
T
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