Bosch WR8/11 G Series, Installation And Operating Istructions

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6 720 607 845 (2015/05)
Adjustments (must be carried out only by qualified technicians) | 13
Any local by-laws and regulations pertaining to installation and
use of gas-heated appliances must be observed.
Please refer to the laws that should be attended in your
country.
5.7 Inlet/exhaust pipe installation
Pipes should be installed according to the instructions in the
relevant manual.
▶ Once connected, the pipe should be inspected and the seal
guaranteed.
5.8 Startup
▶ Open the water and gas flow valves and check that all
connections are leak-tight.
▶ Check the flue gas safety device is functioning correctly,
proceed as explained in “ 7.3 Combustion gas probe”.
6 Adjustments (must be carried out only by
qualified technicians)
6.1 Factory regulations
Natural gas
Heaters designed for Natural gas H (G 20) are factory sealed for
delivery after the values on the characteristics panel have been
checked.
Liquid gas
Propane/butane heaters (G31/G30) are factory sealed for
delivery after the values on the characteristics panel have been
checked.
Power may be tuned according to the burner pressure process,
for which a manometer with U-shaped connecting tubes is
required.
6.2 Conversion to a different type of gas
Only use the original conversion kits .
The conversion must only be performed by a qualified
technician. The original conversion kits are supplied with
assembly instructions.
7 Maintenance (must be carried out only
by qualified 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).
DANGER: Make sure that all flue connections
are tighten sealed.
▶ Failure to follow this requirement may
cause dangerous exhaust gases to enter
living space which may result causing
personal injury or loss of life.
Sealed parts must not be interfered with.
Heaters should not be ignited when the
connections pressure is less than 1,7 kPa more
than 2,5 kPa.
Heaters should not be ignited when the
connections pressure is:
- Propane: less than 2,5 kPa more than 4,5 kPa.
- Butane: less than 2,0 mbar more than 3,5
kPa.
DANGER:
Explosion!
▶ Always turn off 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.