ANY electrical appliance connected to the hot water system. If hydrogen gas is present, an un-
usual sound, such as air escaping, will come from the open faucet as the hot water begins to
flow.
There must be no open flame near this open faucet.
The vent system
should be checked at least once a year for damage and/or blockage. Also
check for correct draft and damper operation.
If the water heater is to be shut off during cold weather, the tank and water lines should be
drained to prevent freezing.
The water heater warranty will be invalid if the tank fails due to excessive pressure, the accu-
mulation of lime or sediment, corrosion, or freezing. The warranty explicitly documents
further causes of invalidation.
If necessary, the burner and combustion chamber may be cleaned with a brush or a vacuum
cleaner. Before proceeding:
• Turn the gas valve to OFF.
• Wait at least 5 minutes for the combustion chamber to cool.
• Use a brush or vacuum cleaner to clean the burner and combustion chamber. This can be
done through the inspection door. It is not necessary to remove the burner.
Inspecting the burner flame.
This should be visually inspected at least once a year to deter-
mine if the flame has altered in appearance in any way. Such a change can indicate the need
for service.
Products of combustion should also be tested. Instruments will give best performance results.
Tests should include CO and CO
2
or O
2
. Refer to “Adjust Primary Air Supply to Burner” on
page 8 of this manual. Also refer to the burner manual.
LIMITED WARRANTY
This warranty covers “Bock” Power Gas water heaters. Bock Water Heaters, a division of Bock
Corporation—a Wisconsin corporation—at 110 S. Dickinson Street, Madison, Wisconsin 53703
(“Company”), warrants to the owner, the tank of this water heater will not leak due to defective
materials or workmanship for FIVE (5) years from the date of original installation. The company
also warrants that no other part of this water heater will fail due to a defect in material or work-
manship for one (1) year.
COMPANY’S RESPONSIBILITY
The company’s responsibility is to repair or replace, at our option, with the prevailing compa-
rable Bock model, any part of the equipment, including the tank, sold by the company which
proves to be defective in material or workmanship during the warranty period, when installed
in accordance with applicable codes and ordinances, and operated and maintained in accor-
dance with our instructions, subject to the conditions and exceptions indicated below. Our
liability, in the event of leakage or other malfunction, is strictly limited to repair or replace-
ment of the defective heater or part, as provided herein. We are not responsible hereunder for
incidental property damage or personal injury, consequential costs or damage. Equipment that
is repaired or replaced will carry the unexpired portion of the original equipment warranty.
BURNER AND CONTROLS
Any burner and/or controls used on a Bock water heater other than the ones recommended by
Bock Water Heaters,
and listed by Underwriters Laboratories, Inc., will void the water
heater warranty
. Bock Water Heaters specifies burners and controls on the basis of safety,
reliability and performance. The burners listed in the chart on page 12 are the burners cur-
rently approved for use by Bock Water Heaters and Underwriters Laboratories. If the burner
being installed is not on this list check with your Bock representative to verify the appropriate
application before installing.
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