Installation and operating instruction
Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact
3 Product description
83309302 1/2018-05 La
28-196
3.5.8 Flue gas system data
WTC 15
WTC 25
Residual supply pressure at flue gas
outlet
76 Pa
116 Pa
Flue gas mass flow rate
0.9 … 6.4 g/s
1.4 … 11.0 g/s
Flue gas temperature at 80/60 °C
53 … 61 °C
54 … 61 °C
Flue gas temperature at 50/30 °C
30 … 43 °C
30 … 42 °C
3.5.9 EnEV Product Characteristics
WTC 15
WTC 25
Boiler efficiency factor at 100 % ca-
pacity and at medium boiler temperat-
ure 70 °C
98.2 % H
i
(88.5 % H
s
)
98.5 % H
i
(88.7 % H
s
)
Boiler efficiency factor at 30 % capa-
city and at return temperature 30 °C
110.4 % H
i
(99.4 % H
s
)
110.3 % H
i
(99.3 % H
s
)
Standby loss at 30 K above room
temperature
0.29 %; 76 W
0.16 %; 76 W
