Daikin WMC - Page 32

IOM 1210-1 • MAGNITUDE
®
MODEL WMC CHILLERS 30 www.DaikinApplied.com
operaTIon
Cooling Tower Bypass VALVE Setpoints
Figure 30: Tower Bypass VALVE Setpoint Screen
Table 7: Tower Bypass VALVE Setpoint Settings (See page 32 for complete explanation.)
Description No. Default Range Password Comments
Valve Control Slope Gain 15 1 0 to 99 T Control gain for temperature (or lift) slope
Valve Control Error Gain 14 20 0 to 99 T Control gain for temperature (or lift) error
Valve Control Range (Max) 13 100% 0 to 100% T Maximum valve position, overrides all other settings
Valve Control Range (Min) 12 10% 0 to 100% T Minimum valve position, overrides all other settings
Temp - Max Start Position 11 90 °F 0 to 100 °F T
Condenser EWT at which valve should be open to tower. Valve position
is set to SP8
Maximum Start Position 10 100% 0 to 100% T Initial valve position when condenser EWT is at or above Setpoint # 9
Temp - Min Position 9 60 °F 0 to 100 °F T Condenser EWT at which initial valve position is set to Setpoint # 6
Minimum Start Position 8 10% 0 to 100% T Initial position of valve when condenser EWT is at or below Setpoint # 9
Stage Down @ 7 20% 0 to 100% T
Valve position below which the fans can stage down (Tower - Setpoint
#2 = Valve Stage Down VFD speed below which the next fan speed can
turn off (Tower - Setpoint # 2 = valve/VFD
Stage Up @ 6 80% 0 to 100% T
Valve position above which the fans can stage up (Tower - Setpoint #2
= Valve Stage Down VFD speed above which the next fan speed can
turn on (Tower - Setpoint # 2 = valve/VFD
Valve Deadband (Lift) 5 1.0 psi 0 to 20.0 psi T Control deadband, Tower - Setpoint #1=Lift
Valve Deadband (Temp) 4 1.0 °F 0 to 10.0 °F T Control deadband, Tower Setpoint #1=Temp
Valve Target (Lift) 3 30 psi 10 to 130 psi T
Target for lift pressure (Tower - Setpoint #1= Lift), Works with Setpoint
# 5
Valve Target (Temp) 2 65 °F 40 to 120 °F T
Target for condenser EWT (Tower Setpoint #1= Temp), Works with
Setpoint # 4
Tower Valve Type 1 NC (To Tower) NC, NO T Normally closed (NC) or normal open (NO) to tower
NOTE: Table 7 relies on Setpoints 1 and 2 in Table 8 on page 31. The setpoints listed in Table 7 should only be changed by a
Daikin Applied technician. Contact a Daikin Applied service representative for more information.