Bosch CWH 1000 P, Service Bulletin Booklet

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W W W W WARNIN ARNIN ARNIN ARNIN ARNING G G G G
LP & N LP & N LP & N LP & N LP & NG ARE EXTREMEL G ARE EXTREMEL G ARE EXTREMEL G ARE EXTREMEL G ARE EXTREMELY FL Y FL Y FL Y FL Y FLAMMABLE SO AMMABLE SO AMMABLE SO AMMABLE SO AMMABLE SO
TTTTTAKE EXTRA PRECA AKE EXTRA PRECA AKE EXTRA PRECA AKE EXTRA PRECA AKE EXTRA PRECAUTIONS WHEN UTIONS WHEN UTIONS WHEN UTIONS WHEN UTIONS WHEN
PERF PERF PERF PERF PERFORMIN ORMIN ORMIN ORMIN ORMIN G ANY W G ANY W G ANY W G ANY W G ANY WORK T ORK T ORK T ORK T ORK TO THE HEA O THE HEA O THE HEA O THE HEA O THE HEATER TER TER TER TER
CT-03
page 1 of 1
rev 09/06
Bosch Water Heating
340 Mad River Park, Waitsfield, VT 05673
© BBT NORTH AMERICA CORPORATION
Bosch Group
CHECKING THE DRAFT
MODELS: 1000P, 1600P, 1600H
260PN, 425PN, 425HN
1. Close all doors and window in the building.
2. Operate all fuel burning appliances and exhaust
systems in the building with the exception of the
tankless water heater. Allow time for these items to
utilize the air in the structure. Up to one hour may
be necessary.
3. Remove the cover from the tankless unit and hold a
recently extinguished match, candle, or any other
visible smoke source in front of the triangular open-
ing on the draft diverter.
4. The smoke should be sucked quickly into the opening
and up the exhaust vent. If the smoke is blown back,
a negative air situation exists and must be corrected.
See the combustion air section in the manual or
bulletin CT-05 Negative air and freeze prevention.
5. Now run the heater for 10 minutes, then hold a
smoke source at the top right side of the draft
diverter. The smoke should be drawn in the louvers
on the side. If this is not the case, the unit is not
drafting properly and flue gases are being exhausted
into the space in which the heater is installed. This
is not safe and must be corrected. Reference the
venting section in the manual to ensure venting is in
accordance with the manufacturer’s specifications.
Note: Poor venting can result in exces-
sive sooting around the water heater,
overheating, and release dangerous
carbon monoxide into the living space
causing serious injury and/or death.
Note: Damage to the heater as a result
of improper venting will not be covered
under warranty.
Step 3: Hold extiguished
match here
Step 5: Hold extiguished
match here
1000P. 1600P, 1600H,
260PN, 425PN, 425HN