Hawk 1000 Section 5 — Commissioning
Part No. 750-366 5-13
5.7 Setpoints
5.7.1 Operating Setpoint
Figure 5-23. Operating Setpoint
Steam Pressure (Water Temperature) setpoint and on/off differential are set here. If dual setpoint is selected,
the Operating Setpoint 2 can be entered from the HMI but the ON/OFF points are calculated using the same
dP/dT as Setpoint 1.
Set Point = steam pressure (water temperature) operating setpoint
On Point = Set Point + (On dP% x Set Point)/100. Valid entries for On dP are from -50% to Off dP%.
Off Point = Set Point + (Off dP% x Set Point)/100. Valid entries for Off dP are from On dP% to the calculated
value where Off Point is not greater than the Safety Valve setpoint.
5.7.2 Outdoor Temperature Reset (Hot Water only)
If Outdoor Reset was selected during system configuration, the desired setpoints should be entered here.
Figure 5-24. Outdoor Reset screen
Hot Standby when active will cycle the boiler on if the shell water temperature drops 5 degrees F below the
“Hot Standby Temp”. The boiler will remain at low fire until the shell water temperature reaches the “Hot
Standby Temp” at which time the boiler will turn off. I:5.7 ALFCO must be turned off to initiate Hot Standby.
Hot Standby can be initiated manually by pressing <Force Hot Standby> (on the Firing Rate Screen).
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