Servicing
30
Fig. . 11 Mounting bracket, connecting dimensions
NOTICE: The manufacturer recommends installing water filter to the heating system.
Fig. . 12 VIADRUS K4G1HXXXX – Boiler connections, bottom view of the boiler
Fig. . 13 VIADRUS K4G1HXXXX –Connections of the boiler with a flow type heater, bottom view of the boiler
Fig. . 14 VIADRUS K4G1HXXXX – Connections of the boiler with a reservoir type heater, bottom view of the boiler
The manufacturer recommends placing these products in closed heating systems.
The expansion tank capacity is 10 liters. This volume is enough for approx. 150 l of water in the heating system. In case of the capacity of the
heating system more than 150 l it is necessary to install an additional expansion tank with the capacity calculated for the actual capacity of the
heating system.
The system should be designed for a temperature gradient of 50/30 °C due to the use of condensation. The condensing boiler can also be used
for old gravitational systems that usually were overdesigned and thanks to this fact condensation can be efficiently used even for this system but
it is necessary to expand this system with a corresponding expansion tank.
Condensing boilers are equipped with a modulating pump Wilo.
Connecting to the DHW heating system and to the gas pipe is implemented through ball valves.
1 … heating water outlet 3/4"
2 … condensate outlet
Ø 25
3 … hot water outlet 1/2"
4 … safety valve outlet
Ø 21,2
5 … filling valve
6 … gas inlet 3/4"
7 … system water filling inlet + hot water heating
inlet 1/2"
8 … heating water inlet 3/4"
1 … heating water outlet 3/4"
2 … condensate outlet
Ø 25
3 … safety valve outlet
Ø 21,2
4 … gas inlet 3/4"
5 … filling valve
7 … system water filling inlet
1/2"
8 … heating water inlet 3/4"
1 … heating water outlet 3/4"
2 … water inlet to the heater 3/4"
3 … condensate outlet
Ø 25
4 … safety valve outlet
Ø 21,2
5 … gas inlet 3/4"
6 … filling valve
7 … water inlet from the heater
3/4"
8 ... hot water heating inlet 1/2"
9 … heating water inlet 3/4"
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