11
System examples
Logano plus SB325 – 6 720 806 328 (2013/07)
39
11.2 Safety equipment in accordance with the EC type inspection
The following safety equipment is included within the boiler's type-test qualification.
11.3 Requirements for alternative items of safety
equipment and other pieces of equipment
11.3.1 Safety valve requirements
• The safety valve must be suitable for discharging domestic hot water
(e.g. via type-tested appliances with the TÜV.SV…D/G/H ID).
• The pipework between the boiler and the safety valve must be
unrestricted. The pressure drop in the pipework between the boiler
and the safety valve must be kept to a minimum.
• The safety valve must be able to safely discharge the rated output
during a full load with the anticipated overpressure.
• The pressure drop of the discharge pipe must not exceed the nominal
pressure of the safety valve by more than 10 %.
• The safety valve must be installed accessibly on the heat appliance or
within close range in the flow pipe, without any barriers between the
heat appliance and the safety valve.
11.3.2 High limit safety cut-out requirements
• Appliances which are suitable for responding must be installed
(e.g. type-tested appliances with the TÜV.STB ID... or appliances
according to EN 60730-2-9 (appliance type 2) or EN 14597).
• Observe the information in chapter 3.12 when adjusting the high limit
safety cut-out.
• Limiters with a time delay must not be installed.
• The limiter is generally installed with the sensor set in the designated
socket branch with a sensor pocket. The installation situation for
other appliances is yet to be established. The sensor pocket is
screwed in ex works.
11.3.3 Maximum pressure limiter requirements
• Appliances which are suitable for responding under increasing
pressure must be installed (e.g. type-tested appliances with the
TÜV.SDB...S... ID).
• Observe the information in chapter 3.14 of the installation
instructions.
• Limiters with a time delay must not be installed.
• The limiter sits on the boiler safety assembly (
chapter 2.11
and 2.12). Possible connection with G ½ ".
11.3.4 Minimum pressure switch as low water level limiter
requirements
• Appliances which are suitable for responding under decreasing
pressure must be installed (e.g. type-tested appliances with the
TÜV.STB/F/... ID).
• Observe the information in chapter 5.6 of the installation
instructions.
• Limiters with a time delay must not be installed.
• The limiter sits on the boiler safety assembly (
chapter 2.11
and 2.12). Possible connection with G ½ ".
11.3.5 Minimum pressure limiter as low water level limiter
requirements
• Appliances which are suitable for responding under decreasing
pressure must be installed (e.g. type-tested appliances with the
TÜV.STB/F/... ID).
• Observe the information in chapter 5.6 of the installation
instructions.
• The limiter sits on the boiler safety assembly (
chapter 2.11
and 2.12). Possible connection with G ½ ".
11.3.6 Water level limiter as low water indicator requirements
• Appliances which are suitable for responding with a lack of water must
be installed (e.g. type-tested appliances with the TÜV.HWB... or
TÜV.WB... ID).
• The low water indicator is installed on the boiler; possible connection
G 2".
11.3.7 Burner requirements
• Gas burner certified in accordance with EN 676.
• Please observe EMC and Low Voltage Directives, and other relevant
European guidelines.
• Please observe the instructions in chapter 2.2.
11.3.8 Boiler controller
• EMC and Low Voltage Directives must be observed.
• Please observe the instructions in chapter 3.12.
The following pieces of equipment are components of
the EC type inspection. We therefore recommend that
you purchase safety equipment with the boiler.
Safety component
Used with boiler size
Make
Component designation
Minimum pressure switch
1)
1) With fully wired connecting cable for Buderus control units, only permissible for
300 kW. For boiler sizes > 300kW, EN 12828: 2003 specifies that a low water indicator or
suitable alternative, e.g. minimum pressure limiter is used.
Boiler output
300 kW
Fantini Cosmi B01AS1
Suitability confirmed by a test
report
Minimum pressure limiter as low
water indicator
Boiler output > 300 kW
Sauter DSL 143 F001
TÜV ID …6022
Water level limiter as low water
indicator
Boiler output > 300 kW
Sasserath SYR
09333.20.011
TÜV.HWB. … .190
Maximum pressure limiter
Boiler output > 300 kW
Sauter DSH 143 F001
TÜV ID …6023
High limit safety cut-out
general
Sauter RAK 13.5050 B
TÜV ID: 0000006982
Tab. 18 Approval designations of additional safety equipment in accordance with EN 12828:2003 for the floor standing condensing boilers
Logano plus SB325
If using different safety equipment to the type listed in
Tab. 18, the following information must be observed so
that the boiler's type-test qualification is not invalidated.
