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Bosch C 1210 ES/ESC Manual page 5

Natural gas liquefied petroleum gas indoor residential and commercial models
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For your safety
▶ Do not store or use gasoline or other flammable, combustible or
corrosive vapors and liquids in the vicinity of this or any other
appliance.
DANGER: Fatal accidents!
Carbon monoxide poisoning.
▶ Carefully plan where you install the heater. Correct
combustion air supply and flue pipe installation are
very important. If a gas appliance is not installed
correctly, fatal accidents can result such as carbon
monoxide poisoning or fire.
DANGER:
Carbon monoxide poisoning.
▶ Exhaust gas must be vented to outside using
approved vent material. See table 5, page 12 (In
Canada use only ULCS636 approved material). Vent
and combustion air connector piping must be sealed
gas-tight to prevent flue gas spillage, carbon
monoxide emissions and risk of fire, resulting in
severe personal injury or death. Approved vent
terminations must be used when penetrating to the
outside.
DANGER: Electric shock!
▶ Field wiring connections and electrical grounding
must comply with local codes, or in the absence of
local codes, with the latest edition of the National
Electric Code, ANSI/NFPA 70, or in Canada, all
electrical wiring must comply with the local codes and
the Canadian Electrical Code, CSA C22.1 Part 1.
DANGER: Electric shock!
Shock hazard: line voltage is present.
▶ Before servicing the water heater, unplug power
supply cord from outlet. Failure to do so could result
in severe personal injury or death.
WARNING: Damage to the appliance from over
pressure.
▶ The heater must be disconnected from the gas supply
piping system during any pressure testing of that
system at test pressures equal to or more than 0.5
psi.
NOTICE:
▶ The appliance should be located in an area where
leakage of the heater or connections will not result in
damage to the area adjacent to the appliance or to
lower floors of the structure. When such locations
cannot be avoided, it is recommended that a suitable
drain pan, adequately drained, be installed under the
appliance. The pan must not restrict combustion air
flow.
WARNING:
▶ The maximum inlet gas pressure must not exceed the
value specified by the manufacturer and the minimum
value listed is for the purpose of input adjustment.
C 1210 ES/ESC
Key to symbols and safety instructions | 5
NOTICE:
▶ If a water heater is installed in a closed water supply
system, such as one having a backflow preventer in
the cold water supply line, means shall be provided to
control thermal expansion. Contact the water
supplier or local plumbing inspector on how to control
this situation.
WARNING: Fire danger!
▶ Keep appliance area clear and free from combustible
materials, gasoline and other flammable vapors and
liquids.
NOTICE:
▶ Do not obstruct the flow of combustion and
ventilation air.
NOTICE: Appliance malfunction!
▶ If power is lost while appliance is operating. Turn off
both water and power for 15 seconds to reset device.
WARNING: Risk of scalding and property damage.
▶ Precautions must be taken prior to manually
operating the relief valve to avoid contact with hot
water discharged from the relief valve and to prevent
water damage.
NOTICE: Appliance damage!
▶ Label all wires prior to disconnection when servicing
controls. Wiring errors can result in improper and
dangerous operation. Verify proper operation after
servicing.
WARNING: System damage!
▶ If a relief valve discharges periodically, this may be
due to thermal expansion in a closed water supply
system. Contact the water supplier or local plumbing
inspector on how to correct this situation. Do not plug
the relief valve.
WARNING: Property damage!
▶ If the water heater is used in a space heating
application, all piping and components connected to
the water heater must be suitable for use with potable
water.
WARNING: Personal Injury from toxic chemicals.
▶ Toxic chemicals, such as those used for boiler
treatment, shall not be introduced into the potable
water used for space heating.
WARNING: Personal Injury from toxic chemicals.
▶ A water heater which will be used to supply potable
water shall not be connected to any heating system or
component(s) previously used with a nonpotable
water heating appliance.
6 720 644 887 (2013/02)

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