EX17DT and EX22DT Installation and Operation Manual
35
If there is a power failure while the furnace is
on, then the furnace will start automatically
when the power is restored.
If the furnace fails to ignite, the furnace will
attempt ignition after 1 hour. The “Ignition
Failure” fault code, 11, will appear during that
hour and disappears after a successful ignition.
If ignition fails again, then the fault code will
remain and another attempt to ignite will occur
in 1 hour. The fault code is not stored in the
fault code history.
If the flame is extinguished during forced
combustion then the furnace will attempt
ignition after 1 hour. The “Ignition Failure” fault
code, 11, will appear during that hour and
disappears after a successful ignition. Forced
combustion takes place for about 15-18
seconds before ignition. After this time, the
temperature control logic controls the
combustion.
If the flame is extinguished (burner combustion
failure) while the temperature control logic is
operating the furnace, then the furnace will
immediately attempt ignition. No fault code will
appear.
In summary, if the ignition fails or the flame is
extinguished during forced combustion then the
furnace will attempt to restart after 1 hour. If the
flame is extinguished after this period then the
furnace will immediately attempt ignition.
The vertical louvers may be adjusted to move
the air flow more to the right or to the left.
Use a screw driver or similar object to bend
each louver to the desired position.
Do not bend repeatedly (no more than 5 times)
or else the louver will break.
Warm air is humidified when it passes over the
water in the tray.
To fill the tray, remove the bottom panel by
pushing on both sides and pulling it toward you.
Pull the tray out and fill with water. Do not
exceed the fill line. Push the tray back in and
attach the bottom panel. Do not operate the
furnace unless the humidifier tray is installed.
During operation a small amount of
condensation is produced in the flue system
and drains into the humidifier tray.
5.6 Adjust Air Flow
Direction
5.5 Add Water to
the Humidifier
5.7 Restart Function
Do not remove the bottom trim panel or the
humidifier tray while warm air is flowing.
CAUTION
Do not adjust the air flow louvers while warm
air is flowing.
CAUTION
Figure 50
The horizontal louvers (which determines the
vertical air flow direction) are fixed and cannot
be adjusted.
Figure 49
