Dunkirk Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler - Manual (Page 39)

39
Gas
CO
2 CO
Min. Max.
Natural Gas 9.0 9.5 <200ppm
Propane 10.0 11.0 <200ppm
NOTICE
Contact Technical Support for additional
information or assistance.
Natural Gas only**
1. Measure input. Compare to table above. Continue
to measure input and CO
2
until both measured
values are within range specified in tables .
Propane Gas
Most propane systems do not have flow meters.
1. Check CO
2
. Propane should be between 10% and
11.0%.
• If CO
2
is low increase gas flow following figure
9-3 & 9-4.
• If CO
2
is high decrease gas flow following figure 9-3
& 9-4.
FIGURE 9-3 Gas Valve - Models
050/075/100/150/200 MBH
• To increase gas flow turn 'throttle' left or counter
clockwise .
• To decrease gas flow turn 'throttle' right or
clockwise .
• Limit adjustment to one turn and retest.
FIGURE 9-4 Gas Valve - Model 299 MBH
• To increase gas flow turn 'throttle' left or counter
clockwise .
• To decrease gas flow turn 'throttle' right or
clockwise .
• Limit adjustment to one turn and retest.
Verify Burner, Proper Operation
1. Inspect burner flame through Sight Glass. See
figure 11-1 & 11-2.
2. Operate boiler through several heating cycles,
including domestic hot water, if used. Verify proper
operation.
9 - START UP PROCEDURE