Data Sheet
FBH Floor heating manifold
Application
The FBH floor heating manifold is used for
controlling water flow in under floor heating
systems. Each tube of the floor heating system is
connected to the manifold, thus making it possible to control water flow or heat supply to each
room in the building individually.
The FBH range includes manifolds from 2 to 12
outlets - see page 2.
FBH floor heating manifolds are supplied with all
necessary parts included:
• 1 supply manifold with flowmeter and possibility
for individual shut-off of each circuit
• 1 return manifold
• 2 ball valves
• 2 brackets with screws and plugs
2
3
10
4
1
The valves can be controlled electronically by
TWA-K thermal actuators or act as self-acting
units by means of remote temperature adjusters,
either by using CF2 or wired system.
5
8
8
8
8
2
10
Scope of delivery
1. Manifold body, stainless steel
2. Air-vent valve
3. Cap on regulation valve M30x1.5 mm
4. 1” plug
5. Euro cone
6. Drain valve
7. Brackets
8. Flowmeter
9. Euro cone
10. Flow mark
11. Fastener set
12. 1” ball valves, 2 pcs., incl. flat packing
System layout
1
6
9
7
12
12
11
FBH
TWA-K
VDUDR102
© Danfoss
09/2009
1
Data sheet
FBH Floor heating manifold
Ordering
Product description
Type/Size
Code no.
FBH Manifold 2+2, stainless steel
FBH-2F
088X0302
FBH Manifold 3+3, stainless steel
FBH-3F
088X0303
FBH Manifold 4+4, stainless steel
FBH-4F
088X0304
FBH Manifold 5+5, stainless steel
FBH-5F
088X0305
FBH Manifold 6+6, stainless steel
FBH-6F
088X0306
FBH Manifold 7+7, stainless steel
FBH-7F
088X0307
FBH Manifold 8+8, stainless steel
FBH-8F
088X0308
FBH Manifold 9+9, stainless steel
FBH-9F
088X0309
FBH Manifold 10+10, stainless steel
FBH-10F
088X0310
FBH Manifold 11+11, stainless steel
FBH-11F
088X0311
FBH Manifold 12+12, stainless steel
FBH-12F
088X0312
Thermal actuator - 24V - NC
TWA-K
088H3140
Thermal actuator - 230V - NC
TWA-K
088H3142
12x2 mm
013G4152
13x2 mm
013G4153
14x2 mm
013G4154
15x2.5 mm
013G4155
16x1.5 mm
013G4157
16x2 mm
013G4156 1)
16x2.2 mm
013G4163
17x2 mm
013G4162
18x2 mm
013G4158
18x2.5 mm
013G4159
20x2 mm
013G4160
20x2.25 mm
013G4093 1)
20x2.5 mm
013G4161
12x2 mm
013G4182
14x2 mm
013G4184
15x2.5 mm
013G4185
16x2 mm
013G41862)
16x2.25 mm
013G4187
18x2 mm
013G4188
20x2 mm
013G4190
20x2.25 mm
013G40932)
20x2.5 mm
013G4191
10 mm
013G4120
12 mm
013G4122
14 mm
013G4124
15 mm
013G4125
16 mm
013G4126
18 mm
013G4128
Compression fittings for PEX tubing in
accordance with ISO 15875.
Max working pressure: 6 bar
Test pressure: 10 bar
Max. flow temperature: 95 °C
G ¾” internal thread
Max. flow temperature given by the tube
manufacturer must not be exceeded.
Compression fittings also suitable for
PERT tubing in accordance with ISO
15875.
1)
Compression fittings for ALUPEX tubing.
Max working pressure: 6 bar
Test pressure: 10 bar
Max flow temperature: 95 °C
G ¾” Internal thread
Max flow temperature given by the tube
manufacturer must not be exceeded.
Compression fittings also suitable for
PERT/ALU/PERT tubing.
2)
Compression fittings for STEEL and
COPPER tubing
Max working pressure: 6 bar
Test pressure: 10 bar
Max flow temperature: 120 °C
G ¾” Internal thread
2
VDUDR102
© Danfoss
09/2009
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 optimal
comfort shall be achieved with a minimum of
energy consumption and is easily carried out
following the example shown below.
Example
Room 1
1
Determine longest tube/largest room
25 m2
2
Desired cooling (ΔT)
5 °C (typical)
3
Determine heat requirement for the room
50 W/m2
4
Conversion factor
1.16
5
Calculation of flow for the room
Q (l/h) = 50 W/m2 x 25 m2 5 °C x 1.16
Q (l/h) = 216 l/h
Room 2
6
Determine area for the next room
15 m2
7
Calculation of flow for the room
(ΔT and heat requirement is assumed
identical for the rooms in this case)
Q (l/h) = 50 W/m2 x 15 m2
5 °C x 1.16
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 +1½ turn from closed to
open. Then adjust each flow meter to obtain flow
as calculated (see example).
• Close all flow meters.
• Fully open all circuits, starting with the longest
pipe length, then the second longest etc.
• If the right flow cannot be obtained, the pump
must be replaced with a larger one.
Q (l/h) = 129 l/h
• Start balancing with fully open the flow meter
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 first
and adjust for wear to wanted flow.
The pressure drop is calculated as sum of:
ΔP-pipe (longest circuit) + ΔP flow meter (longest circuit) + ΔP valve for 1½ turn, fig. 2 (longest
circuit).
Pressure loss with flow meter
Pressure loss with thermostatic valve
kvs = 1.12 m³/h
100
50
kvs = 2.56 m³/h
1000
100
1000
500
50
500
300
30
300
20
200
20
200
10
100
10
100
50
50
3
30
3
30
2
20
2
20
1
10
1
10
0,5
5
0,3
3
0,2
2
0,1
1
2
3
5
10
20
30
50
100
Mass flow m (kg/h
VDUDR102
200 300
500
1000
2000 3000
Pressure loss ∆p (kPa)
5
5
0,5
5
0,3
3
0,2
2
0,1
1
2
3
5
10
20
30
50
100
200
300
500
1000
Pressure loss ∆p (mbar)
30
Pressure loss ∆p (mbar)
Capacity /commissioning
FBH Floor heating manifold
Pressure loss ∆p (kPa)
Data sheet
2000 3000
Mass flow m (kg/h
© Danfoss
09/2009
3
Data sheet
FBH Floor heating manifold
Design
Item
Supply manifold
with flowmeter
Operation conditions
Max differential pressure:
Max working pressure:
Max test pressure:
Max flow temperature:
Description
Material
1
Sightglass
Heat resistant plastic
2
Flowmeter nut
Plastic
3
Adjusting cap
Plastic
4
Supply manifold body
Steel
5
O-rings
EPDM
6
Connection nipple
Brass
0.6 bar
Manifold without flowmeter 10 bar / Manifold with flowmeter 6 bar
Manifold without flowmeter 16 bar / Manifold with flowmeter 10 bar
90 °C
Dimensions
32
L1
67
200
50
52
4
Type
2+2
3+3
4+4
5+5
6+6
7+7
8+8
9+9
L1 (mm)
192
242
292
342
392
442
492
542
VDUDR102
© Danfoss
09/2009
10+10 11+11 12+12
592
642
692