Benchmark 750-3000 Boiler Installation & Startup Manual
SECTION 4 – INITIAL START-UP
OMM-0121_D • GF-205 • 5/9/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 61 of 122
Analyzer Probe Port Access Instructions
Figure 4-2a: BMK 750 & 1000 Analyzer Probe Port Location
Figure 4-2b: BMK 1500 – 3000 Analyzer Probe Port Location
4.3 FUEL TYPES and COMBUSTION CALIBRATION
All BMK units are preconfigured at the factory to use either natural gas or propane gas, and
BMK models between 1500 through 3000 are available in dual fuel versions, allowing the
installer/operator to switch between natural gas and propane gas onsite as needed.
Both fuel types require different combustion calibration values, and so care should be taken to
ensure the appropriate instructions are used for the fuel being used. Instructions for natural gas
are presented first, then for propane after.
Instructions for switching between fuel types in dual fuel models is presented in sections after all
combustion calibration instructions.
CAUTION!
Ensure the appropriate combustion calibration instructions are used for the fuel being used in
the boiler.
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