Saturn KDB - 161 GOM Manual page 94

No 16-1
Unplug the boiler from the electric outlet.
Open the front cover.
Release the heating water by unscrewing the drain screw below the circulator pump and release the heating
water from the splitter.
Separate the board holding the air pressure switch and the ignition transformer by removing one screw.
Separate the front cover of the main heat exchanger by removing the 9 screws in the front and the 2 screws on
the top.
Separate the gas pipe between the gas control valve and the nozzle.
Separate the fan unit according to the manual.
Remove the plastic hose band connecting the expansion tank and the main heat exchanger.
Separate the high limit fuse according to the manual.
Separate the overheating prevention device wire.
Remove the hot water temperature sensor.
Remove the 2 screws at the bottom, the screw on the left and the one on the right, fixing the main heat
exchanger to the front cover.
Separate the main heat exchanger from the boiler.
Separate the exhaust gas notice plate from the main heat exchanger by removing the 6 screws on the top.
Remove the 4 screws fixing the main heat exchanger and separate the main heat exchanger from its front
cover.
Part name
Replacement steps
- 94 -
KDB-GOM
Main heat exchanger - 1
Series