3.3.6 Rating
Combustion heat rating Q
C
17.0 … 86.5 kW
Boiler capacity at 80/60 °C
16.5 … 84.3 kW
Boiler capacity at 50/30 °C
18.2 … 90.0 kW
Fan speed Natural Gas
1620 … 6900 rpm
Fan speed Liquid Petroleum Gas
1620 … 6600 rpm
Condensate quantity at 50/30 °C
2.2 … 6.4 L/h
Standard efficiency at 40/30 °C
110.1 % H
i
(99.2 % H
s
)
3.3.7 Heat exchanger
Water content
7.5 litre
Boiler temperature
max 85 °C
Operating pressure
max 6 bar
Throughput limit
max 7.8 m
3
/h
Pressure loss
Observe the pressure loss of the condensing boiler and the maximum throughput limit
when determining the hydraulic sizing of the heating system.
▶
Determine pressure loss using the diagram.
0
350
350
400
350
300
250
200
150
100
50
0
1
3
5
7
9
2
4
6
8
1
Flow rate in m³/h
2
Pressure loss in mbar
3.3.8 Flue gas system data
Residual supply pressure at flue gas outlet
7 … 157 Pa
Flue gas mass flow rate
7.6 … 38.2 g/s
Flue gas temperature at 80/60 °C
58 … 68 °C
Flue gas temperature at 50/30 °C
31 … 48 °C
Flue gas connection
DN 160/110
Installation and operating instruction
Gas condensing boiler WTC-GB 90-A
3 Product description
83266502 • 1/2010-08 • La
16-95
