Return temperature raising facility
For the Vitoplex up to 560 kW, we deliver a pre-assembled return tem-
perature raising facility for installation to the boiler flow and return con-
nectors; for the Vitorond up to 270 kW, to the boiler connection kit. See
datasheet "Boiler accessory".
Boiler flue connection kit for the Vitorond
For the connection of the following system components:
■ Flow and return
■ Safety equipment
■ Return temperature raising facility
Sample applications
For technical guide sample applications.
10.4 Safety equipment
The EN 12828 applies to the design of hot water heating systems with safety temperatures up to 110 ºC. Take the requirements of EN 12953
into consideration for heating systems with 120 ºC. This standard contains safety requirements laid down for boilers and boiler systems.
Safety equipment to EN 12828 Safety equipment to EN 12953
Required safety equipment
ADG Sealed expansion vessel
AV1 Shut-off valve
AV2 Shut-off valve with protection against unintentional closing, e.g.
cap valve
E Drain
EST Flash trap
MA Pressure gauge assembly
SDB1 Safety pressure limiter max.
SDB2 Safety pressure limiter min.
SIV Safety valve
SL Safety expansion line
STB High limit safety cut-out
TH Thermometer
TR Temperature controller
WB Water level limiter
(only required for Vitorond)
Further legends
HC Heating circuit
HKP Heating circuit pump
HR Heating water return
HV Heating water flow
In the diagram Safety equipment to EN 12828, the replacement set for
the flash trap is shown with an additional high limit safety cut-out and
safety pressure limiter.
Design information
(cont.)
30
VIESMANN
OIL/GAS BOILERS
10
5822 426 GB
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