Watts AERCO Benchmark OMM-0121 Operation And Maintenance Manual page 82

Benchmark 750-3000 Boiler Operation & Maintenance Manual
APPENDIX A: BOILER MENU DESCRIPTIONS
TABLE A-6: CALIBRATION Menu Item Descriptions
MENU OPTION
Supply Gas Pressure
26
In Adj
27 Gas Plate dp In Adj
28 mA Out Adj
A/F Sensitivity
29
Power Reset
30
Water Temp Reset
31
32 Gas Press Reset
Min Off Time
33
Heatr Tuning Dsp
34
35 Heatr Bkpt Dsp
Stop Level
36
Start Level
37
SKIP FEATURE:
Items 38 – 40 embody a feature that allows the user to define a Fire Zone the C-More will avoid. In the rare
instance when a unit emits an objectionable noise at a certain Fire Rate and no other remedy solves the
problem, a Fire Rate skip zone may be defined to command the C-More to Skip-Over the defined Fire Rate.
38 – Skip Range CNTR
– Skip Range Span
39
– Skip Speed
40
O2 Settings:
Items 41 – 43 allow calibration of oxygen readings.
41
– O2 Gain
– O2 Offset
42
– O2 Sensor
43
44 Cal Temp Sensors
Temperature Channel Offset:
Items 45 – 50 embody the feature, which allow the user to field calibrate all six temperature channels by
entering an offset corresponding to the desired temperature channel.
45 – FFWD Temp Offset
46 – Exhst Tmp Ofset
OMM-0122_D • GF-206 • 5/9/2019
Allows adjustment of the Supply Gas Pressure level from
-5.0% to +5.0% in 0.1 % increments.
Allows adjustment of the Gas Plate dp level from -5.0% to +5.0% in 0.1%
increments.
Allows adjustment of the milliamp output from -5.0 mA to +5.0 mA.
Allows adjustment of the Air/Fuel (A/F) Valve stepper motor sensitivity to be
adjusted from 1% to 5% in 1% increments.
Allows the Power Reset Option to be set to AUTO or MANUAL.
Allows the Water Temperature Reset function to be set to AUTO or
MANUAL.
Allows the Gas Pressure Reset function to be set to AUTO or MANUAL.
Allows the minimum Off time to be set from 0 to 10 minutes.
Allows Heater Tuning Display to be Enabled or Disabled.
Allows Heater Breakpoint Display to be Enabled or Disabled. When Enabled,
Breakpoints can be viewed and/or changed.
Allows the Stop Level to be set to a valve position ranging from 0% to the
presently set Start Level.
Allows the Start Level to be set to a valve position ranging from the presently
set Stop Level to a maximum of 40%.
Defines the Center (Fire Rate) of the skip band.
Defines the + and – band of the Skip Zone Size.
Defines the speed (Seconds/Fire Rate) at which the band will be skipped.
Range = 0.5 to 1.5. (Unity Gain, No Mods)
Range = -3.0 to +3.0.
Enables the O2 Sensor
Allows calibration of the temperature sensor
Range: -20 to + 20 (either ºF or °C)
Range: -20 to + 20 (either ºF or °C)
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DESCRIPTION
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