IOM 1210-1 • MAGNITUDE
®
MODEL WMC CHILLERS 36 www.DaikinApplied.com
operaTIon
MOTOR Setpoint Screen
Figure 43: MOTOR Setpoint Screen
Table 9: MOTOR Setpoint Settings
Description No. Default Range Password Comments
Nominal Capacity 10 100 0 to 9999 Tons T
Determines when to shut off a compressor. ONLY applies to multi-chiller
setup.
Maximum LWT Rate 9 0.5 °F/min 0.1 to 5.0 °F/min M Inhibits loading if LWT change exceeds the setpoint value
Minimum LWT Rate 8 0.1 °F/min 0.1 to 5.0 °F/min M Additional compressor can start if LWT change is below setpoint
Soft Load Ramp Time 7 5 min 1 to 60 min M Time period to go from initial load point (% RLA) set in SP 5 to 100% RLA
Initial Soft Load Limit 6 40% 10 to 100% M Initial amps as % of RLA, Uses SP4 & 6
Soft Load Enable 5 OFF OFF, ON M Soft load on or off, Uses SP6 & 7
Nameplate RLA * 4 Dependent on dataplate T RLA value from compressor nameplate
Maximum Amps 3 100% 10 to 100% T
% RLA above which loading is inhibited (Load Limit) SP + 5% unloads
compressor
Minimum Amps 2 40% 5 to 80% T % RLA below which unloading is inhibited
Demand Limit Enable 1 OFF OFF, ON O
ON sets %RLA at 0% for 4 mA external signal and at 100% RLA for 20 mA
signal OFF – signal is ignored
NOTE: Setpoints that have a technician level password (T) should only be changed by a McQuay International technician.
Contact a McQuay International service representative for more information.
CAUTION
* Chiller Nameplate RLA MUST match chiller dataplate per compressor.
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