Section 4 — System Configuration Hawk 1000
4-10 Part No. 750-366
Safety Valve Setpoint (steam)
On a steam boiler, the proper safety
valve
setting should correspond to the pressure setting of the steam
safety
valve(s) on the boiler.
A
hot water boiler is configured similarly. The max rated
t
emperature
of the boiler should be entered. This
number should not exceed
the
maximum design
temperature
of the boiler. Default for hot
water
boilers
is 250º F. Contact your local Cleaver-Brooks representative if you do not know the maximum
temperature
rating of your
boile
r
.
Steam Transmitter Span The span settings for the steam transmitter is adjustable. The Steam Transmitter
Span value cannot be set lower than the Safety Valve Setpoint and cannot be set higher than 1000. Initially
the Steam Transmitter Span is populated with a default value:
In hot water systems the supply temperature transmitter is not scalable. The transmitters used must be rated
to accommodate the required range:
If the Max Rated Temperature > 250 Deg F the Supply Temp Transmitter is set to 50-300 Deg F.
If the Max Rated Temperature = 250.1 Deg F or greater the Supply Temp Transmitter is set to 50-500 Deg F.
NOx Level (PPM)
Enter the NOx Level for this specific job
.
NOx Level can range from 5-150 PPM and is initialized with a value of 60.0 PPM.
Note: On Steam Boilers If NOx Level is less than 60.0 PPM Remote Setpoint and Dual Setpoint Options
are Not Available
.
When all configurable items on this screen have valid entries, the <Next> button will appear, allowing System
Configuration to continue. The next screen is fuel configuration, where number and type of fuels, turndown,
and combustion control method are selected.
!
Warning
The safety valve setting is critical to the proper operation of
the
boiler. An incorrect setting could lead to unsafe
operation
.
Safety Valve Setpoint Steam Transmitter Span
15.0 psi or less 15.0
15.1 to 150.0 150.0
150.1 to 300.0 300.0
300.1 to 500.0 500.0
500.1 to 600.0 600.0
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