Part I of this series introduced the lead/lag control strategy as it applies to parallel pump operation and discussed the need for identifying the designer’s intent for a particular system. Part II ...

i. Lead secondary chilled water pump will be enabled anytime the chilled water (CHW) system is enabled and will remain enabled for 30 minutes after the CHW system is disabled. b. Pump speed control i.

This innovative device allows the user to control the operation of the air conditioners based on either temperature or runtime. For customers with fluctuating heat loads, the KT400 lead-lag controller ...