Daikin Magnitude - Chiller Maintenance Schedule; Maintenance Procedures; Essential Chiller Maintenance Tasks

www.DaikinApplied.com 61 IOM 1210-7 • MAGNITUDE
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MODEL WMC CHILLERS
operaTIon
Table 29 continued: Controller Setpoints
Description Default Range PW
Bypass Valve, Step and Wait Control
Step 6 sec 0 to 999 sec T
Derivative 1 0 to 99 T
Gain 20 0 to 99 T
Dead Band (D-Band) 1.0 0 to 200 T
Tower Fan, PID Control
Integral 600 sec 0 to 999 sec T
Derivative 1 sec 0 to 999 sec T
Proportional Gain (K) 80 0 to 999 sec T
Dead Band (DB) 0 0 to 9.9 UOM T
Update Period (TC) 500 ms 0 to 9999 ms T
Additional WMC Tower Reset
Tower Reset (Temp) 10 psi 0 to 20.0 psi T
Tower Reset (Lift) 5.0 °F 0 to 10.0 °F T
Sensor Selection ECWT-B3 ECWT-B3 (provided) or EHRT-B9 (not provided) T
Alarms
Evaporator Freeze 34.0 °F -9.0 to 45.0 °F T
Condenser Freeze 34.0 °F -9.0 to 45.0 °F T
Low Suction pressure - Stop 25 psi 5 to 45 psi T
Low Suction pressure - Inhibit 30 psi 7 to 45 psi T
Low Suction pressure - Unload 29 psi 6 to 45 psi T
High Discharge Temperature - Shutdown 190 °F 120 to 240 °F T
High Discharge Temperature - Load 170 °F 120 to 240 °F T
High Discharge pressure 140 psi 120 to 240 psi T
Motor Current Threshold 5% 1 to 20% T
Surge High Suction SH - Start 20 °F 1 to 99 °F T
Surge High Suction SH - Run 12°F 2 to 25 °F T
Service
Unload Timer 120 sec 5 to 300 sec T
Interlock Timer 10 sec 1 to 240 sec T