Viessmann VITOPLEX 200 Type SX2A Technical Manual page 6

Vitoplex 200, type SX2A, 700 to 1950 kW
2.1 Product description
Low temperature oil/gas boiler
Three-pass boiler
For operation with modulating boiler water temperature
Permissible flow temperature (= safety temperature) up to 110 °C (up
to 120 °C on request)
Permissible operating pressure 6 bar
■ CE designation: CE-0085BQ0020
– according to Gas Appliances Directive 2009/142/EC
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■ Economical and environmentally friendly through modulating boiler
water temperature.
Standard seasonal efficiency [to DIN] for operation with fuel oil:
89 % (H )/95 % (H ).
s i
■ Optional stainless steel flue gas/water heat exchanger for higher
standard seasonal efficiency [to DIN] through condensing technol-
ogy.
2.2 Operating conditions with Vitotronic boiler control units
Operation with burner load
1. Heating water flow rate
2. Boiler return temperature (minimum value)
3. Low-end boiler water temperature
4. Two-stage burner operation
5. Modulating burner operation
6. Reduced mode
7. Weekend setback
Note
For water quality requirements, see page 44.
*3 For sample applications, see technical guide sample applications.
VIESMANN
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■ Three-pass boiler with low combustion chamber loading, resulting in
clean combustion with low emissions.
■ Wide water galleries and large water content provide excellent nat-
ural circulation and safe heat transfer.
■ Long burner runtimes and fewer cycle intervals, due to large water
content, protect the environment.
■ Compact design for easy transportation – important for modernisa-
tion projects.
■ Economical and safe operation of the heating system through the
digital Vitotronic control system with communication capability.
Standardised LON for complete integration into building manage-
ment systems.
Requirements
≥ 60 %
None
*3 – Oil operation 40 °C
– Gas operation 53 °C
– Oil operation 50 °C
– Gas operation 60 °C
Stage 1; 60 % of rated output
Between 60 and 100 % of rated output
Single boiler systems and lead boiler of multi-boiler systems
– Operation with the low-end boiler water temperature
Lag boilers of multi-boiler systems
– Can be shut down
As per reduced mode
< 60 %
– Oil operation 53 °C
– Gas operation 58 °C
– Oil operation 60 °C
– Gas operation 65 °C
No minimum load required
No minimum load required
OIL/GAS BOILERS