Lennox GWM-050IE

38
Gas
CO
2
CO
Min. Max.
Natural Gas 9.0 9.5 <200ppm
Propane 10.0 11.0 <200ppm
Natural Gas only**
1. Measure input. Compare to table above. Continue
to measure input and CO
2
until both measured
values are within range specied in tables.
Propane Gas
Most propane systems do not have ow meters.
1. Check CO
2
. Propane should be between 10% and
11.0%.
• If CO
2
is low increase gas ow following gure
9-3 .
• If CO
2
is high decrease gas ow following gure 9-3.
FIGURE 9-3 Gas Valve - Models
050/075/100/150/200 MBH
• To increase gas ow turn 'throttle' left or counter
clockwise .
• To decrease gas ow turn 'throttle' right or
clockwise .
• Limit adjustment to one turn and retest.
Verify Burner, Proper Operation
1. Inspect burner ame through Sight Glass. See
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