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LR, LRK, LR-NT, LRK-NT 21 - 32
We reserve the right to make changes to dimensions and construction 5 edition 30.10.2007
© Copyright YGNIS AG CH-Ruswil
4. Technical data
4.1. Main data / operating conditions
Max. operating pressure (standard model) 6,0 bar g
Test pressure 9,0 bar g
(other pressures on request)
Boiler supply and return pipe flanges PN 6
Max. operating temperature (safety cut-out) 110°C
Min. operating temperature with fuel oil 60 °C
with natural gas 70 °C
with propane 70 °C
Min. return temperature:
Pyronox LR with fuel oil 50 °C
with natural gas 60 °C
with propane 60 °C
Pyronox LR-NT with fuel oil 35 °C
with natural gas 45 °C
with propane 45 °C
Recuperator LRK, LRK-NT no limits
Min. flue gas temperature
with fuel oil S-content 50 ppm 100 °C
500 ppm 110 °C
0.1% 115 °C
0.2% 120 °C
0.5% 125 °C
with natural gas S-content 10 mg/nm3 95 °C
150 mg/nm3 110 °C
Max. CO
2
-content with fuel oil 15.5%
(dry flue gas) with natural gas 11.7%
with propane 13.7%
4.2. Minimum operating pressure
LR, LR-NT 21 22 23 24 25 26 27 28 29 30 31 32
bar g
0.55 0.55 0.65 0.50 0.70 0.75 0.85 1.10 1.25 1.30 1.60 1.70
4.3. Required water quality
First fill
Total hardness: < 10 °f (100 mg CaCO3/l; 84 mg MgCO3/l)
Make-up water
Total hardness: < 1 °f (10 mg CaCO3/l; 8.4 mg MgCO3/l)
Circulating water
Total hardness: lower than 1 °f
pH (at 20°C): 8.3 – 9.5
Phosphates (PO4): lower than 30 mg/l
Chlorides (CI): lower than 50 mg/l
Oxygen (O2): lower than 0.1 mg/l
7


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