Bosch 520-PN-L Specifications download pdf (Page 4)

6 720 644 942 (2014/11) 520 HN

4 | Key to symbols and safety instructions

Danger from escaping flue gases

▶ Ensure all vent pipes and chimneys are not damaged or

blocked.

▶ Connect only one appliance to each vent system or

chimney liner.

▶ The venting system piping must not feed into another air

extraction duct.

▶ Do not route the flue system piping through or inside

another air extraction duct.

Danger of explosion of flammable gases

▶ Work on gas components may only be carried out by a

trained and certified installer.

▶ Installation, gas and flue connection, initial commissioning,

electrical connections and annual maintenance must only

be carried out by a trained and certified installer.

Combustion air

▶ Keep the combustion air free of corrosive substances

(halogenated hydrocarbons that contain chlorine or

fluorine compounds).

Never shut off safety valves!

▶ Water may escape from the safety valve at any time when

the water is being heated.

inspection/maintenance

▶ servicing and repairs may only be carried out by a trained

and certified installer.

▶ immediately correct all faults to prevent system damage.

▶ use only bosch spare parts! damage caused by the use of

parts not supplied by bosch may void the warranty.

instruct the customer

▶ explain to the customer how the appliance works and how

to operate it.

▶ inform the customer that he/she must not carry out any

alterations or repairs.

Danger from electric shock

▶ Ensure that only an authorized contractor performs

electrical work.

▶ Before performing electrical work, disconnect the power

and secure the unit against unintentional reconnection.

▶ Ensure the system has been disconnected from the power

supply.

Risk of scalding at the hot water draw-off point

▶ When the water heater is in operation, temperatures in

excess of 122 °F (50 °C) can occur. To limit the

temperature at the tap, install a thermostatic DHW mixing

valve.

▶ Water heated for washing the laundry, dishes and for other

cleaning purposes can cause scalding and permanent

injuries.

▶ Children, elderly, and handicapped persons are more likely

to be permanently injured by hot water. Never leave such

individuals in the tub or shower unattended under any

circumstances. Children must not be allowed to operate

hot water faucets themselves or to fill a bathtub.

▶ If the building has occupants in the above groups who

operate hot water faucets, or state laws / local ordinances

stipulate specific water temperatures, take the following

precautions:

– Use the lowest possible temperature setting.

– To prevent scalding, install a tempering device, such as

an automatic mixing valve, at hot water tap or water

heater. Select and install the automatic mixing valve in

accordance with the valve manufacturer's

recommendations and instructions.

▶ Water exiting from drain valves can be extremely hot. To

avoid injuries:

– Check that all connections are tight.

– Direct exiting water away from people.

▶ Measures must be taken to protect against excessive

temperature and pressure! Installation of a T&P safety

valve is required.

To protect against corrosion and ensure compliance with the

rules for electrical safety, observe the following points:

▶ Use metal fittings for potable water heating systems with

plastic piping.

▶ Use only original accessories from the manufacturer.

▶ When installation of the water heater is complete, inspect

the ground conductor (including metal fittings).

Maintenance

Customers are advised to:

▶ Sign a maintenance and inspection contract with an

authorized contractor. Inspect and maintain the water

heater as necessary and on a yearly basis. Service as

needed.

▶ Use only genuine spare parts.

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Bosch 520-PN-L Specifications Page 4

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