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Finned copper tube gas boilers & water heaters – Boiler manual
FTXLF-IOM-HN-1-110308 Copyright 2008 Mestek, Inc.
If the pressure signal is correct, measure the flue gas CO
5.
2
. It
should be between 9% and 9.5%.
If CO
a.
2
is correct, proceed to step 6.
If CO
b.
2
is not within this range, adjust the air trim adjust-
ment slightly (see Figure 19, page 26) on top of mixing box
to achieve a CO
2
of 9% - 9.5%.
If adjusting the air trim adjustment does not correct the prob-
c.
lem, contact technical support at the factory to troubleshoot
the problem.
If CO
6.
2
and pressure signal are correct, allow the boiler to reach
steady state and verify supply gas pressure and check input rates
as explained in the Gas Supply Piping section.
Remove jumper on AA and allow boiler to settle into minimum
7.
input. Observe the combustion readings to ensure the boiler is
operating correctly.
When finished, disable the low fire hold switch and replace test
8.
ports to normal state. Remove the manometer connections and
close the control panel door.
The Futera XLF boiler allows for many modes of operation and
9.
control methods. Reference the XLF HeatNet Control IOM.
to tUrn oFF GAs to AppLiAnce
Set the operating control to its lowest setting.
1.
Turn off all electric power to the boiler if service is
2.
to be performed.
Close the manual main and pilot gas shut-off valves.
3.
cHecKinG & ADJUstments
Proper polarity of the ignition transformer wiring is
import. Improper wiring of the ignition transformer
can result in an explosion causing extensive property
damage, severe personal injury or death!
spark gap
With the main and pilot gas manual valves in the closed position
energize the unit. Look through the sight glass in the pilot tube to
observe the trial for ignition. Make sure that the spark is strong and
continuous. If not, check and adjust the spark gap as shown in Fig-
ure 20.
Spark Gap
Figure 20
