39
Gas
CO
2
CO
Min. Max.
Natural Gas 9.0 9.5 <100ppm
Propane 10.0 11.0 <150ppm
NOTICE
Contact Technical Support @ 800-325-5479 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 specifi ed in tables.
Propane Gas
Most propane systems do not have fl ow meters.
1. Check CO
2
. Propane should be between 10% and
11.0%.
•
If CO
2
is low increase gas fl ow following fi gure
9-3 & 9-4.
•
If CO
2
is high decrease gas fl ow following fi gure 9-3
& 9-4.
FIGURE 9-3 Gas Valve - Models
050/075/100/150/200 MBH
•
To increase gas fl ow turn 'throttle' left or counter
clockwise .
•
To decrease gas fl ow turn 'throttle' right or
clockwise .
•
Limit adjustment to one turn and retest.
FIGURE 9-4 Gas Valve - Model 299 MBH
•
To increase gas fl ow turn 'throttle' left or counter
clockwise .
•
To decrease gas fl ow turn 'throttle' right or
clockwise .
•
Limit adjustment to one turn and retest.
Verify Burner, Proper Operation
1. Inspect burner fl ame through Sight Glass. See
fi gure 11-1 & 11-2.
2. Operate boiler through several heating cycles,
including domestic hot water, if used. Verify proper
operation.
9 - START UP PROCEDURE
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