The FBH floor heating manifold is used for controlling the water flow in floor heating systems.
Each string of the floor heating system is connected to the manifold, thus making it possible to
control water flow or heat supply for each room
individually.
The FBH range includes manifolds from 2 to 12
outlets.
FBH floor heating manifolds are supplied with all
necessary parts included:
1 supply manifold with flowmeter and possi-
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bility for individual shut-off of each circuit
1 return manifold
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2 ball valves
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2 brackets with screws and plugs
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The manifold valves can be controlled electronically by TWA-K thermal actuators or act as selfacting units by means of remote temperature adjusters, either by using CF2 or wired system.
The pre-setting of the manifold valves determines the flow in the floor heating tubes and
is therefore an important factor for obtaining
optimal hydraulic balance in the system.
A correct hydraulic balance is important if opti-
mal comfort shall be achieved with a minimum of
energy consumption and is easily carried out following the example shown below.
Example
Room 11 Determine longest tube/largest room25 m²
2 Desired cooling (ΔT)5°C (typical)
3 Determine heat requirement for the room50 W/m²
4 Conversion factor1.16
5 Calculation of flow for the room
Room 26 Determine area for the next room15 m²
Calculation of flow for the room (ΔT and
7
heat requirement is assumed identical for
the rooms in this case)
FBH manifold with TWA-K
Presetting with TWA-K actuators on the supply
manifold can be carried out by opening the regulation valve by turning fully to open. Then adjust
each flow meter to obtain flow as calculated (see
example).
If the right flow cannot be obtained, the
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pump must be replaced with a larger one.
Start balancing with fully open the flow me-
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ter for circuit with the longest pipe length.
Next open flow meter for the circuit with
second longest pipe length, until wanted
flow is indicated in flow meter and so on.
When all circuits are done, go back to the
Close all flow meters.
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Fully open all circuits, starting with the lon-
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gest pipe length, then the second longest
etc.
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first and adjust for wear to wanted flow.
The pressure drop is calculated as sum of: ΔPpipe (longest circuit) + ΔP flow manifold.
Max differential pressure:0.6 bar
Max working pressure:Manifold with flowmeter 6 bar
Max test pressure:Manifold with flowmeter 10 bar
Max flow temperature:90 °C
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