Nortec GS Series - Manual (Page 57)

GS Series Installation | 54
Removal of the Heat Exchanger
Take the humidifier out of operation.
Disconnect the gas supply pipe from the connection on the humidifier and close off the pipe.
Unlock and remove the right side panel(s).
On Direct Vent units only: Remove hoses from air intake manifold and air inlet elbows.
Dismount flue gas pipe at the flue gas outlet connection.
On Direct Vent units only: Dismount air supply pipe at the air supply connection.
Unlock and remove the left and the right top panels.
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.
Undo the coupling of the respective flexible gas pipe and remove the flexible gas pipe.
Dismount the burner with the air blower and the gas pressure regulating valve of the respective heat
exchanger.
Unscrew the nuts and remove the flue gas manifold from the tank.
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.
Figure 43: Heat Exchanger Assembly