Installation and operating instruction
Oil condensing boiler WTC-OB 18-B
3 Product description
83311002 1/2018-03 La
18-132
3.4.8 Flue gas system data
Stage 1
Stage 2
Residual supply pressure at flue gas outlet 40 Pa
60 Pa
Flue gas mass flow rate
4.8 g/s
7.1 g/s
Flue gas temperature at 80/60 °C
56 °C
58 °C
Flue gas temperature at 50/30 °C
34 °C
39 °C
3.4.9 EnEV Product Characteristics
Boiler efficiency factor at 100 % capacity and at
medium boiler temperature 70 °C
97.6 % H
i
(92.1 % H
s
)
Boiler efficiency factor at 30 % capacity and at re-
turn temperature 30 °C
104.7 % H
i
(98.8 % H
s
)
Standby loss at 50 K above room temperature
1.2 %; 215 W
Standby loss at 30 K above room temperature
0.7 %; 115 W
