HELIX VX-050 Installation, Operation & Maintenance Manual page 38

9-5 for combustion air analyzer port.
Gas
Min.
Natural Gas 9.0
Propane 10.0
NOTICE
Contact Technical Support @ 800-325-5479 for
additional information or assistance.
Natural Gas only**
4.
Measure input. Compare to table above. Continue
to measure input and CO
values are within range specified in tables
Propane Gas
Most propane systems do not have flow meters.
1.
Check CO . Propane should be between 10% and
2
11.0%.
• If CO is low increase gas flow following figure
2
9-3.
• If CO is high decrease gas flow following figure 9-3.
2
FIGURE 9-3 Gas Valve - Models
1/4" Flat Head
Screwdriver
• To increase gas flow turn 'throttle' left or counter
clockwise .
• To decrease gas flow turn 'throttle' right or
clockwise .
9 - START UP PROCEDURE
CO
2
CO
Max.
9.5 <200ppm
11.0 <200ppm
until both measured
2
.
• Limit adjustment to one turn and retest.
Verify Burner, Proper Operation
1.
Inspect burner flame through Sight Glass. See
figure 11-1.
2. Operate boiler through several heating cycles,
including domestic hot water, if used. Verify proper
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