24 | Maintenance Schedule & Procedures; Gas Leak Inspection; Flue / Combustion Air Piping Inspection; Checking For Wiring And Connections - Bosch SSB85 Service Manual

24 | Maintenance schedule & procedures
8 Maintenance schedule & procedures
To maintain proper functionality, operation and efficiency it is required
to perform the specific maintenance operations at the specified regular
intervals.
Before carrying out any maintenance operation turn off the
m
boiler and close the gas supply using the manual ball valve
Time interval Maintenance
Verify the cleanliness of the area around the
Annually
boiler
Annually Check the pressure of the hydraulic system
Check vent piping and verify if leaks are
Annually
present
Annually Check air piping and verify if leaks are present
Annually Check relief valve
Monthly (follow local,
state, federal or local
Verify the condensate discharge system
authority having
jurisdiction guidelines)
Every two months Test low water cut off
Every two months Verify the reset button of low water cut off
Every six months Check all piping (gas and water) for leaks
End of heating season Shut off the boiler
Tab. 10 User maintenance/inspection schedule
Time interval Maintenance
Annually * Combustion test
Verify condition of flue and air system
Annually *
(including Venturi and fan)
Annually * Check ignition electrode
Cleaning the combustion chamber (including
Annually *
the burner tube)
Annually * Clean condensate discharge
Safety block check, modulation range check,
Annually *
gas valve closing after burner stop
Annually * Check control parameters
Annually * Check for gas piping leak
Annually * Check wiring and connection
Annually * Verify startup
Annually * Verify the flame
Annually * Check relief valve
Annually * Inspect the burner gasket
(*) Annually or every 2000 hours. Which occurs first.
Tab. 11 Licensed contractor / gas fitter maintenance / inspection schedule
8 .1

Gas Leak Inspection

Inspect all gas piping for leaks.
WARNING: To guarantee no leaks are present utilize a
a
soap-water mixture or gas detector. Do not use any method
which could result in an explosion.
6720866940 (2017/11) US
8 .2

Flue / Combustion air piping inspection

Clear vent system of any obstructions, corrosion, water stains, rust.
Verify the connection between the single components. Verify the outside
terminations are clear. Clean the screens and the louvers if there is any
debris.
8 .3

Checking for Wiring and connections

Check that all wiring is securely fastened and in good condition without
any cracking or alteration of insulation or presence of corrosion in metallic
connection.
8 .4

Burner Head Cleaning

To clean the burner head it is enough to brush the combustion surface
with a paint brush or other soft bristle brush.
[1] Disconnect the boiler from electrical supply. Disconnect the electrical
connectors from fan and gas valve as shown below;
Connectors
Fig. 61 Connectors SSB85 - SSB120
Connectors
Fig. 62 Connectors SSB160
Connectors
Connectors
SSB