McQuay MicroTech II - Figure 34. Configuration 5: Variable-Speed Lead;Standby Pump Set; Figure 35. Configuration 6: Multiple Variable-Speed Pumps; Figure 36. Configuration 7: Primary-Only System

OM 780-2 Page 71
Figure 34. Configuration 5: Variable-Speed Lead/Standby Pump Set
VFD VFD
DPT
Differential pressure transducer
P1
Cooling Loads
P2
Variable frequency drive
ChWR ChWS
a0156
Figure 35. Configuration 6: Multiple Variable-Speed Pumps
VFD
DPT
Differential pressure transducer
P1
Cooling Loads
VFD
P2
Variable frequency drive
ChWR ChWS
VFD
P3
Figure 36. Configuration 7: Primary-Only System
DPT
Differential pressure transducer
Cooling Loads
Optional pressure-controlled loop bypass
ChWR ChWS
a0158