15.1.4 Checking The Electrodes; 15.1.5 Burner Servicing - Bosch Greenstar FS Series Installation And Maintenance Instructions For Contractors

Residential gas condensing boiler
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Inspection and maintenance
▶ Remove the plate type heat exchanger.
Fig. 86 Removing the plate heat exchanger
▶ Install a new plate type heat exchanger with new gaskets and
reconnect the hydraulic assembly in reverse order.
▶ Check all connections used during maintenance for leaks.

15.1.4 Checking the electrodes

▶ Remove the electrode set including gasket and check the electrodes
for contamination; clean or replace, as required.
▶ Re-install electrode set with new gaskets and check for leaks.
Fig. 87 Reinstalling the electrode set
Gas/Gaz?
Fig. 88 Check for gas leaks
68
6 720 641 933-50.2O
2-1/4 + 3/4 ft.-lbf.
(3 + 1 Nm)
6 720 810 590-83.1Wo
0010007499-003

15.1.5 Burner servicing

DANGER:
Fire
Improper operation of the burner
▶ Only operate the burner while installed in a boiler
▶ Remove the burner cover (steps 1 - 4).
2
1
Fig. 89 Removing the burner cover
▶ Remove the burner and clean the components
Fig. 90 Burner
▶ Reinstall the burner in reverse order, including a new gasket.
▶ Adjust the gas-air ratio (Section 12.2).
Greenstar FS/Combi FS – 6 720 810 590 (2020/04)
4
3
6 720 641 933-95.1o
7 181 465 330-08.2R

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