UTICA BOILERS SSC UBSSC-075 Installation Operation & Maintenance page 39

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 specifi ed in tables
Propane Gas
Most propane systems do not have fl ow meters.
1.
Check CO . Propane should be between 10% and
2
11.0%.
• If CO is low increase gas fl ow following fi gure
2
9-3 & 9-4.
• If CO is high decrease gas fl ow following fi gure 9-3
2
& 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.
9 - START UP PROCEDURE
CO
2
CO
Max.
9.5 <100ppm
11.0 <150ppm
until both measured
2
.
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.
39
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