Figure 64 Removing mixer assembly, gas line and gas valve
12.
Remove the air intake tube.
Figure 65 Removing air intake tube
13. Disconnect the ignitor electrical cable and green grounding wire.
14. Remove the nuts securing the fan to the lid.
15. Remove the fan.
Warning
Wear a suitable protective mask to avoid ingesting particles from the refractory.
16. Loosen the eight (8) bolts securing the lid to the heat exchanger using a 5 mm Allen key.
17. To help realign the heat exchanger lid with the heat exchanger upon reassembly, draw a
vertical line from the front of the lid down to the heat exchanger.
18.
Carefully lift (straight up) the heat exchanger lid, and place in a clean dry area. Take care to
avoid damaging the refractory insulation.
7.2.3 Replacing the burner in the EX 400 and 500 models
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