Hamilton Engineering XL800, Installing, Operating & Maintaining

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PART 3. GAS CONNECTION
Natural Gas CO
2
Natural Gas CO ppm LP Gas CO
2
LP Gas CO ppm
Door Closed Door Open Approximate, do not use for setup! Door Closed Door Open Approximate, do not use for setup!
LOW FIRE 8.30% Less than 10 9.60% Less than 10
HIGH FIRE 8.80% Less than 100 10.20% Less than 120
PLEASE NOTE: All adjustments must be made with the appliance door off, which will lower the CO
2
reading 0.2%. See tables above for specific readings.
When checking or replacing a gas valve, the CO
2
percentage in the flue gas is the preferred measuring method to
insure proper combustion and firing rate. CO is used as the (temporary) alternate.
Changing incoming air temperature may vary the CO
2
setting slightly (~0.2–0.6%) after initial set up. This is not
cause for concern or reason to set up again. After one year of operation, set up is required again.
If your appliance will be operated in an area that has inlet air temperature variations greater than 80°F, please use
the following table in adjusting your CO
2
for optimum performance.
(TABLE 3-3) COMBUSTION & FUEL RELATED ADJUSTMENT TABLE
Inlet air ∆T variation
Setup at minimum incoming
air temperature
Setup at maximum incoming
air temperature
80°F Reduce CO
2
0.2% Increase CO
2
0.2%
100°F Reduce CO
2
0.3% Increase CO
2
0.3%
120°F Reduce CO
2
0.4% Increase CO
2
0.4%
(TABLE 3-4) CO
2
ADJUSTMENT TABLE
E. SETTING THE MAXIMUM LOAD
A means of sampling the leaving flue
gas is built into the vent connector
on top of the appliance. Remove the
rubber plug for testing and replace
when testing is completed. This plug
MUST be in place during normal
operation.
Enter the service function (reference
the Control Section for instructions)
from the setup menu. After the
service function is active, fan speed
percentage can be set. This should
be set to 100% to achieve maximum
fan speed for high fire combustion
setting.
If necessary, turn the adjusting
slot [1], which sets the high fire
performance, according to the
markings on the gas valve, to
increase or decrease the CO2
percentage, as shown in Figure 3-2 ,
Part 3, Section D. Appropriate CO
2
percentages are shown in Table 3-3
above.
NOTE: If the system is a common
vented cascade, there are specific
instructions related to proper
combustion setting (see Part 6,
Section B for details).