Boiler System Pipework - Wolf MGK-130 Technical Manual And Installation Instructions

Heating system flow and return are at the top of the
boiler. For connections, see Fig. Always provide shut
off valves for the flow and the return.
Install a check valve downstream of the heating circuit
pump(s) to prevent incorrect circulation.
For new systems we recommend the installation of a
blow-down tank (alternatively a dirt filter) into the return.
For older systems this installation is compulsory.
Install a safety assembly comprising a safety
valve with a response pressure of 6 bar, a
pressure gauge and an automatic air vent
valve.
The line between the boiler and the safety
valve must not be able to be shut off. Severely
excessive boiler pressure due to excessive
boiler water temperatures, can burst the boiler
body or the boiler pipework, which would
lead to a sudden escape of hot water (risk of
scalding).
Provide system separation by means of a heat
exchanger, when using pipes which are not
impermeable to oxygen.
This boiler is only suitable for heating systems
NB
with pumped heating circuits. If no heating
circuit pump has been installed, sufficient
circulation through the radiators cannot be
ensured, so that the room heating cannot be
guaranteed.
The MGK is supplied without circulation pump. The
pump rate of the pump to be installed on site must
be determined subject to the system and boiler
pressure drop. Switching via the MGK (see electrical
connections).
3062880_0910

Boiler system pipework

Fig.: Heating connections
Heating flow
Heating return
13