U.S. Boiler Company K2 Operating Instructions Manual page 11

i. Operation
E. Boiler Sequence Of Operation (continued)
3. Status Screens
Boiler Status screens are the primary boiler monitoring screens. The user may simply "walk" though boiler
operation by repeatedly selecting the right or left "arrow" symbol. These screens are accessed by selected the
"Status" button from the "Home" screen.
Only visible if Zone Panel is
connected. Zone Panel 1 and 2
shown typical for 1 through 4.
Supply:
Measured supply water temperature. This is the
temperature being used to start/stop and fire boiler
when there is a call-for- heat. Header temperature
is shown when selected.
Setpoint:
This is the active setpoint. This temperature
setpoint determined based on active priority;
Central Heat, Auxiliary Heat or Domestic Hot
Water. The setpoint may be the result of Outdoor
Air Reset and Setback selections.
rate:
The rate % value is equal to the actual kbtu/hr
input divided by the boiler rated input.
Priority:
The selected Priority is shown. Available
Priorities are: Standby (no call for heat is present),
Sequencer Control, Central Heat, Auxiliary Heat,
Domestic Hot Water, Frost Protection or Warm
Weather Shutdown.
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Figure 3: Status Screen Overview
Figure 4: Boiler Status Screen Definitions
Status:
Information found at the
bottom of the Status screen
and on the Home screen.
Table 28 shows each status
and the action the control
takes during the condition.
Active fault:
A hard lockout will cause the active
fault indication to appear. When
visible the text becomes a screen link
to the "Help" Menu.
rate Limit:
The "6" symbol appears to the
right of the Rate % when firing rate
is limited or overridden in any way.
During the start-up and shutdown
sequence it is normal for the rate to
be overridden by the purge, light-
off and low fire hold requirements.
When a rate limit is the result of
boiler protection logic the "6" symbol
blinks and becomes a screen link.
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