Safety Instructions - Buderus SU54/5 Notice D'installation Et D'entretien

1.2

Safety instructions

Read all instructions before installing. Perform the steps in the indicated
sequence. Have the DHW tank inspected by a trained service technician
at least once every year. Failure to comply with these instructions can
result in severe, possibly fatal, personal injury as well as damage to
property and equipment.
Installation and servicing
▶ Risk of fire from soldering and brazing!
Take appropriate protective measures when soldering and brazing as
the insulation is flammable, for example, cover the insulation.
▶ Ensure that only a licensed contractor installs or services the DHW
tank.
▶ Use installation material with adequate temperature stability.
Forbidden:
Connection of the potentiostat for an impressed current anode to the
magnesium anode installed in a storage tank is absolutely forbidden!
This would destroy the tank! The warranty would be voided.
Installation and commissioning
▶ In the Commonwealth of Massachusetts, the DHW tank must be
installed by a licensed plumber.
▶ Have an electrician connect the electrical system. The wiring diagram
must be followed.
▶ Do not install this device in rooms with a high moisture level
(e.g. bathrooms, saunas).
Function
▶ To ensure that the tank functions properly, heed these installation and
maintenance instructions.
▶ Never close the blow-off line of the T&P safety valve. For safety
reasons, water may escape during heating.
Danger from electric shock
▶ Only electricians may work on the electrical system.
▶ 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 DHW tank 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:
SU54.5 | SU80.5 | SU100.5 – 6 720 819 292 (2017/11)
Safety Considerations and Symbol Descriptions
– 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.
The chart below shows the relationship between water temperature and
time until there is a risk of scalding. It can be used as the basis for
determining the safest water temperature for your application.
Temperature Time to severe scalding
120 °F (48 °C) longer than 5 minutes
125 °F (51 °C) 1.5 to 2 minutes
130 °F (54 °C) approx. 30 seconds
135 °F (57 °C) approx. 10 seconds
140 °F (60 °C) less than 5 seconds
145 °F (62 °C) less than 3 seconds
150 °F (65 °C) approx. 1.5 seconds
155 °F (68 °C) approx. 1 second
Table 2 Approximate time-temperature relationship until there is a risk
1)
of scalding
1) Source: Moritz, A.R. and Henriques, F.C., Jr. (1947). Studies of thermal injury. II.
The relative importance of time and surface temperature in the causation of
cutaneous burns, Am J of Pathol, 23, 695-720.
To protect against corrosion and ensure compliance with the rules for
electrical safety, observe the following points:
▶ Use metal fittings for drinking water heating systems with plastic
piping.
▶ Use only original accessories from the manufacturer.
▶ When installation of the tank 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 DHW tank as necessary on a
yearly basis. Service as needed.
▶ Use only original spare parts.
Flooding
▶ After a flood, do not use the appliance if any part has been
submerged. Damage to appliances that have been submerged can be
quite severe and pose numerous safety risks.
▶ An appliance that was subject to flooding must be replaced.
Corrosion
▶ To reduce oxygen permeation and therefore corrosion to a minimum,
do not use vapour-permeable components!
1
3