Term Definition
Staging
Delay
The number of minutes between boilers being fired up or shut down by the master, that
is, the length of time before the next boiler is brought online once the current firing
boiler has passed its add boiler firing rate level. It must be at minimum equal to time for
closed-loop water to complete one full circuit of system. For large mass systems,
allow for two or more loop times.
Water° From The Default setting is Outlet. When set to Outlet, the controller determines the supply
water temperature from the outlet temperature sensor on the boiler. Alternatively the
2nd Loop Sensor or the DHW Sensor input terminals can be wired to a water
temperature sensor. To support these alternate wiring options the Water ° From setting
must be set to Sec. Loop on DHW to correspond with the wiring. Multi-boiler: Most
have an external sensor mounted on the building supply water.
Section: Definition of terms
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