Bosch WR 11 B - Quali Ed Technicians); Periodic Maintenance Work; Startup after Maintenance Work

6720648592 (2014/05)
16 | Maintenance (must be carried out only by qualied technicians)
7 Maintenance (must be carried out only by qualied technicians)
To ensure that gas consumption and the environmental load
(pollution, etc.) remain as negligible as possible over a longer
period of time, we recommend that you assure to have the
appliance maintained on an annual basis (inspection) or if
necessary (maintenance).
These jobs can only be done by a Bosch Technical Assistance
delegate.
 Only use original spare parts.
 Order the spare parts according to the spare parts
catalogue for the heater.
 Replace the joints and removed O-rings with new ones.
 Only the following lubricants must be used:
– Hydraulic part: Unisilikon L 641 (8 709 918 413)
– Threaded joints: HFt 1 v 5 (8 709 918 010).
7.1 Periodic maintenance work
Functional check
 Check the operation of all safety,
adjustment and
monitoring elements.
Heat exchanger
 Check the heat exchanger is clean.
 In case of dirt:
– Remove the heat exchanger and take out the limiter.
– Clean the chamber with a powerful jet of water.
 If dirt persists: Soak the plates in hot water with detergent
and clean thoroughly.
 If necessary: De-lime the interior of the heat exchanger and
the connection pipes.
 Install the heat exchanger using new joints.
 Install the limiter on the support.
Burner
 Check the burner annually and clean it if necessary.
 If it is very dirty (grease, soot): Remove the burner, soak it
in hot water with detergent and clean it thoroughly.
Water lter
 Replace the water lter installed in the water valve entry.
Burn
er and pilot injector
 Remove and clean the pilot burner.
 Remove and clean the pilot injector.
7.2 Startup after maintenance work
 Tighten all connections once more.
 Read chapter 3 “Use” and chapter 6 “Adjustments”.
DANGER:
Explosion!
 Always turn o the gas cock before
carrying out any work on components
which carry gas.
CAUTION: Leaking water may damage the
appliance!
 Always empty the system before
disassembly of any hydraulic system part.
WARNING:
Is forbidden to start up the appliance without
water lter correctly assembled.