3-16
2. Turn on the fans and monitor the airflow lift. If the
values are between -2.0 and -6.0 grams, perform a few
test burns to see if the unit is operating normally.
♦ Airflow lift values greater than -2.0 (i.e., between
-1.9 and 0.0) may cause incomplete burns due to
insufficient airflow.
♦ Airflow lift values less than -6.0 (i.e., between -6.1
and -10.0 grams) may cause longer warm-up times
and high aggregate correction factors.
NOTE
If you have trouble getting satisfactory airflow lift
values, contact 1.877.TROXLER (1.877.876.9537).
EXHAUST PIPE LENGTH
The length of the exhaust pipe must be less than fifteen feet.
Anything longer will create excessive back pressure on the unit.
EXTERNAL DUCT CONFIGURATION
The exhaust system configuration that requires the least
amount of setup is a duct that allows exhaust to exit the
environment through the wall. For more information, see page
3-5.
The external duct cover must be an open design that does not
restrict airflow (see the figure on the next page).
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