Protecting The Environment - Bosch GWH-425-HN-N Manual

accordance with specifications in the installation
manual. A gas pressure reading is needed to proceed
further. Contact your original installer or a local certified
gas technician to obtain this reading. See chapter 3.9.
3. For proper combustion at high elevations the inlet
gas pressure should be set at installation to the values
in table 3 on page 11 (while operating at maximum
BTU). A gas pressure reading is needed to proceed
further. Contact your original installer or a local certified
gas technician to obtain this reading.
4. Ventilation is not adequate. Ensure adequate
combustion air is being supplied to the unit in
accordance with requirements in the installation
manual. See chapter 3.6.
5. Verify the water heater is vented properly. Ensure the
venting is in accordance with requirements in the
installation manual. See chapter 3.7.
6. The water heater has burners much like a furnace. It
is essential that they remain clean and are supplied with
adequate air for combustion. If the flames burn yellow or
orange it is strongly recommended that the burners be
removed from the unit and cleaned. Once the burners
are removed, the fins in the top of the heat exchanger
can be accessed and brushed or vacuumed clean.
Consult service bulletins on www.boschpro.com for
removing/cleaning the burners.
6 720 608 036

Protecting the environment

7 Protecting the environment
Packing
The packing box may be fully recycled as confirmed by
the recycling symbol
Components
Many parts in the heater can be fully recycled in the end
of the product life. Contact your city authorities for
information about the disposal of recyclable products.
Saving water resources:
B Make sure you close all the taps after any use. Avoid
leaving the taps dripping. Repair any leaking tap.
B Define the temperature you want. This way you have
the precise water flow needed (mixing cold water to
regulate temperature will increase the water flow with
consequent waste of water).
For increased safety shut off the appliance from
the main water supply if your are staying away
from home for a considerable time.
At below freezing temperatures, disconnect the
plumbing connections to the heater and allow
the heater to drain.
To prevent any freeze damage, introduce short
bursts of compressed air (20-40 psi) through
these connections to remove the residual water
in the horizontal pipes and water valve.
Follow instructions in chapter 4.5 to remove any
additional water remaining in the watervalve and
heat exchanger.
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