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Removal of Heat Exchanger
1.1. Take the humidifier out of operation.
2.2. Disconnect the gas supply pipe from the
connection on the humidifier and close off the
pipe.
3.3. Unlock and remove the right side panel(s).
4.4. On Direct Vent units only: Remove hoses
from air intake manifold and air inlet elbows.
5.5. Dismount flue gas pipe at the flue gas outlet
connection.
6.6. On Direct Vent units only: Dismount air
supply pipe at the air supply connection.
7.7. Unlock and remove the left and the right top
panels.
8.8. Free all cable connections to the components
(combustion blower, ignition module, air
pressure switch, etc.) of the respective heat
exchanger.
IMPORTANT: Note the connector assignment.
9.9. Undo the coupling of the respective flexible
gas pipe and remove the flexible gas pipe.
10.10. Dismount the burner with the air blower and
the gas pressure regulating valve of the
respective heat exchanger.
11. Unscrew the nuts and remove the flue gas
manifold from the tank.
12. Unscrew the nuts on the heat exchanger and
pull out the heat exchanger from the tank.
Re-installation is carried out in the reverse
sequence. Replace all seals with new ones.
-37-
Figure #38
Heat Exchange Assembly