Operating Instructions and Installation Instructions

LR, LRK, LR-NT, LRK-NT 21 - 32

We reserve the right to make changes to dimensions and construction 5 edition 30.10.2007

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

-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