The pump is disabled when the associated plant equipment is disabled and:
have_req=true
): either the equipment has been proven
off for dtOff
or is not requesting flow.
have_req=false
): the equipment has been
proven off for dtOff
.
When the flow request point is available, the default value for the pump
disable delay dtOff
is increased from 3 min
to 10 min to ensure that flow is not cut off too soon.
Used in Guideline 36 for disabling dedicated primary pumps in chiller and boiler plants.
The enable signal u1
is yielded by the staging event sequencing logic.