Making The Heating Circuit Connection; Connecting The Flow; Installing The Safety Assembly (On Site) - Buderus Logano plus GB402 Installation And Maintenance Instructions Manual

6 Fitting
▶ Create the ventilation air line up to the ventilation air bend using a
standard air supply system in accordance with the requirements of
the country concerned.
▶ Insulate the ventilation air line to prevent condensate forming (inside
and outside).
Fig. 12 Ventilation air connection for balanced flue operation
(accessory)
[1] Guard
[2] Adaptor
6.5

Making the heating circuit connection

NOTICE: System damage due to leaking connections!
▶ Install all lines free from stress to the boiler
connections.
▶ Use new gaskets if fittings need to be undone.
▶ Only tighten flanges in the heating flow and return
after the connections have been made.
▶ Before installing the pipe connections, check
connections and gaskets on the boiler for possible
damage.
Boiler flow (VK)
Boiler return (RK)
DN80
Tab. 9 Water connection dimensions
16
PN6 standard flange EN1092

6.5.1 Connecting the flow

▶ Insert a gasket between the flange on the boiler and the threaded
flange on the flow.
▶ Secure the flange connection with 4 screws, washers and nuts.
Fig. 13 Fitting the flow (VK)

6.5.2 Installing the safety assembly (on site)

NOTICE: System damage through incorrect installation!
▶ Install the safety valve and automatic air vent valve or
safety assembly in the flow.
The safety assembly (accessory) comprises an
automatic air vent valve and a pressure gauge. As an
option, it may be converted for use with a safety valve
(additional accessory) and a fitting manifold for the
maximum pressure limiter.
If these accessories are not used, a safety valve,
pressure gauge and an automatic air vent valve must
generally be installed in the flow, upstream of the first
shut-off valve.
▶ Seal in distributor [2] at flow connector [1] using a suitable sealant.
▶ Remove the union at the cap valve fitting [3].
▶ Fit union with gasket to connector of fitting manifold [4] and secure to
the cap valve on the distributor.
Logano plus GB402 – 6 720 804 428 (2012/09)