Installation
21
Condens 7000 FP – 6721846699 (2022/12)
5.7 Connecting the air supply (for balanced flue
operation)
NOTICE
Damage to gaskets due to burred edges on the insertion ends of the
pipe parts!
Make sure the insertion ends are free of burrs. If chamfering on site is
required, only do so in accordance with the manufacturer's
documentation.
The combustion air is supplied to the floor standing boiler either through
an external wall connection, a duct or a separate pipe in the duct.
The dimensions of the combustion air pipe must be calculated in
accordance with the current regulations.
An adaptor is available as an accessory for balanced flue operation.
Only install the original accessories set.
We would recommend the installation of a silencer in the combustion air
pipe, subject to the location of the air inlet opening on the outside of the
building.
The wind barriers for the combustion air supply and the flue gas routing
must be installed on the same wall of the building.
Remove cover panel [2] from the front boiler cover.
Remove front [1] and rear [4] boiler covers.
Fit adaptor [3] (accessory) on the tie bar and seal with sealant
(accessory).
Installing the front and rear boiler cover (Chapter 5.11).
Establish on-site connection between supply air connection with
standard air supply system and the adapter ensuring it is free from
tension and seal.
Observe the installation instructions for the standard air supply
system.
In cascade arrangements, ensure that the floor standing boiler is
equipped with a separate combustion air pipe.
Install supply air pipe up to adapter using a standard air supply
system according to the national requirements and ensuring it is free
from tension.
To avoid condensate formation in the combustion air pipe (inside and
outside), insulate the combustion air pipe.
Fig. 25 Accessory set for open flue mode
[1] Front boiler cover
[2] Temporary cover
[3] Adapter
[4] Hear boiler cover
5.8 Hydraulic connection
NOTICE
Risk of system damage due to leaking connections!
Before installing the pipe connections, check connections and
gaskets on the boiler for possible damage.
Install connecting pipework / connection flanges mechanically
uncompressed at the connection flanges of the floor standing boiler
on-site.
Tighten the screws of the flange connections in the heating flow and
return to a maximum tightening torque of 50 Nm only after the
assembly of the connections.
Use new gasket if screw fittings need to be undone.
We recommend that the on-site system flange is initially connected to the
boiler and then establish the further system piping. Mechanical loading
of the connection flanges is not permissible.
Table 8 Water connection sizes
Heating flow (VK)/Heating return (RK)
Boiler size [kW] Connection
350 – 500 DN100, PN6 standard flange EN1092
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