MAKING MODERN LIVING POSSIBLE
Handbook
Danfoss Pipes for Hydronic Floor Heating
The English language is used for the original instructions.
Other languages are a translation of the original instructions.
(Directive 2006/42/EC)
© 2012 Copyright Danfoss A/S
Handbook Danfoss Pipes for Hydronic Floor Heating
Table of Contents
Danfoss FH Pipes
1 Danfoss FH Pipes .......................................... 3
2 FH Composite Pipes ........................................ 3
3 Pressure Loss for FH Composite Pipes ............................ 4
4 FH PE-RT Pipes ............................................ 4
5 Pressure Loss for FH PE-RT Pipes ............................... 5
6 Pipe Bending ............................................. 5
7 Minimum Bending Radius with Bending Springs .................... 5
8 Precautions .............................................. 6
9 Connections ............................................. 6
10 Product Range ............................................ 7
The Danfoss FH pipes are high quality pipes for
under floor heating applications.
All Danfoss FH pipes are manufactured from the
highest quality PE-RT (Polyethylene Raised Temperature resistance) which is a recyclable material
with similar characteristics to those of PE-Xa
pipes.
The PE-RT material gains it’s strength from the
octen side chain molecules which makes additional cross linking redundant. Even without
cross linking the Danfoss FH pipes hava a lifespan
of more than 50 years. All the layers are permanently bonded together with a high quality
bonding adhesive.
1. PE-HD outer layer
2. Adhesive
3. Butt-welded aluminium
4. PE-RT inner pipe
FH Composite Pipes
The Danfoss Composite pipe consists of 5 layers,
the outer layer is made from PE-HD, the core
from aluminium and the inner pipe from PE-RT.
This combination gives the pipe a strong and
protective outer layer making the pipe resistant
for use on building site conditions. The Aluminium core makes installation easier by helping the
pipe stay in the bent shape without springing
back. The PE-RT inner pipe has a smooth surface
which minimizes pressure loss allowing for long
circuit lengths, and at the same time minimize
the murmur in the installation.
No Corrosion
The FH Composite pipe is a 100% oxygen tight
thanks to the continuously butt-welded aluminium core. Oxygen tightness is a must to keep the
installation free from corrosion which ensures a
long life time for the system.
The FH composite pipe exceeds the demand for
oxygen barrier according to DIN 4726
No noise
The aluminium core ensure that the thermal expansion of the pipe is only 1/7 to that of a full
plastic pipe, this helps to prevent noise problems
in the floor construction.
In shape
The Danfoss composite pipe is manufactured in
such a way that the aluminium layer prevents the
pipe from going back to its original form. This
makes it easy to install.
Quality inside
The PE-RT resin is typically available in different
qualities and to ensure that the quality of the
pipe we only use the highest quality of materials.
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1000
800
600
400
200
100
80
60
40
20
10
Ø 20 / 16 mm
Ø 18 / 14 mm
Ø 17 / 13 mm
Ø 16 / 12 mm
Ø 14 / 10 mm
Ø 11.6 / 8.6 mm
Handbook Danfoss Pipes for Hydronic Floor Heating
Pressure Loss for FH Composite Pipes
Volume flow - water quantity m (kg/h)
Water temperature: 40°C Pressure loss, [Pa/m] (1 mbar = 100 Pa)
Materials PE-RT / Aluminium / PE-HD
Max. working pressure 10 bar
Test pressure 16 bar
Max. flow temperature (short term) 110 °C
Max. working temperature 95 °C (not for continous operation)
Recommended max. working temperature 65 °C
FH PE-RT Pipes
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The Danfoss PE-RT pipe is a multilayer pipe with 5
layers, the outer layer is made from PE-RT which
serves as a protective layer for the EVOH oxygen
barrier. The smooth inner pipe is made from PERT to prevent pressure loss and pipe murmur. Installation is eased by the flexibility that the PE-RT
material provides.
Long life time
The EVOH (Ethylene Vinyl Alcohol) oxygen barrier
in the pipe helps to keep the installation free
from corrosion. The oxygen barrier is accordance
with DIN 4726.
Construction site conditions
The outer layer of the pipe serves as a protection
barrier which keeps the oxygen barrier free from
scratches and makes the pipe well suited for the
conditions on construction sites.
Flexible
The PE-RT material is very flexible which makes it
easy to work with, the flexibility of the material
makes it possible to install the pipe even at low
temperatures.
1000
900
800
700
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10
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1
2 3 4 5 6 7 8 9 10
2
2 3 4 5 6 7 8 9 10
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100
1000
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
ø
20
/16 mm
ø
20/
15
mm
ø
16 /12 mm
0.1
Handbook Danfoss Pipes for Hydronic Floor Heating
Pressure Loss for FH PE-RT Pipes
Mass flow, kg/h
Flow velocity (m/s) Pressure loss, [Pa/m] (1 mbar = 100 Pa)
Water temperature: 40 °C.
Materials PE-RT / EVOH / PE-RT
Max. working pressure 6 bar
Test pressure 10 bar
Max. flow temperature 95 °C
Max. working temperature 60 °C
Oxygen barrier EVOH
Pipe Bending
The flexible nature of the pipe material makes it
easy and quick for one person to install the Danfoss FH pipes. To achieve a proper bend hold the
small bit showing. It is important not to bend so
hard that the spirals of the bending spring begin
to show on the outside of the PE-sleeve.
pipe at a distance approx. 40 cm and then bend it
to the required radius. To avoid damage to the
Minimum Bending Radius with Bending Springs
pipe kinks should be avoided, this could be made
easier by using a bending spring.
Bending with internal bending spring
The pipe is first bevelled to remove inner plastic
edges and make the pipe end nice and circular.
The internal spring is then inserted to leave just a
Pipe dimension[mm]
16 80 (5 x Od) 64 ( 4 x Od) 64 (4 x Od)
Manual pipe bender ra-
20 100 (5 x Od) 80 (4 x Od) 80 (4 x Od)
Od = Outside diameter.
dius [mm]
Bending with external bending spring
The external bending spring is ushed over the
pipe to the bending point. After carrying out
bending the spring is removed.
Internal pipe bending
spring radius [mm]
External bending
spring radius [mm]
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Handbook Danfoss Pipes for Hydronic Floor Heating
Precautions
Connections
UV-protection
Inside buildings there is no need to take extra
precaution against UV radiation. The grey outer
synthetic layer of the composite pipe is not sensitive to indirect UV radiation inside buildings.
However the Danfoss Composite pipe has to be
protected from direct sunlight and UV radiation.
Completed installations must be covered or protected in another way from UV radiation (e.g. enclosed in a protective pipe).
Frost
The following combinations of Anti-freeze and
anticorrosion with water can be used for the Danfoss FH pipes:
Antifrogen N
▪
Antifrogen L
▪
Tyfocor
▪
Tyfocor L
▪
Tyfocor LS
▪
Danfoss connection fittings are available as compression and press fittings, both variants comes
in the dimension 16 x 2.0mm and 20 x 2.25mm as
the FH pipes.
Compression fitting
The Danfoss compression fitting uses the well
know compression ring technology where the
ring is firmly fixed to the pipe by screwing the
coupling tight. The fitting connection can be disconnected from the manifold but the ring still remains fixed to the pipe.
by Clariant
by Clariant
by Tyforop Chemie GmbH
by Tyforop Chemie GmbH
Tyforop Chemie GmbH
It is important that the proportion of water to
Anti-freeze and anti-corrosion should be a minimum of 25% Vol and a maximum of 80% Vol
since otherwise there is a danger of corrosion in
some metallic areas. Installations that have been
temporarily filled with anti-freeze and anti-corrosion must be emptied and cleaned several times
with water in order to remove any residual product. Any residual product can lead to corrosion.
Anti-freeze and anti-corrosion additives must not
be allowed to attack Polyethylene, EPDM, PPSU,
and brass.
The connection is easily made with help of the
Danfoss hand-press tool which makes installation
possible under all conditions. The pipe is bevelled and simply pressed into the sleeve of the
press fitting. The plastic ring has holes so the
pipe is visible when it is pressed enough into the
sleeve. The ring also serves as guidance as where
to place the press tool before pressing to ensure
a tight connection. After pressing the sleeve the
plastic rings can be removed.
Press fitting
The press fitting is used for fast and economical
connections in the floor. The press fitting technology is a well known and proven technique.
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Handbook Danfoss Pipes for Hydronic Floor Heating
Product Range
FH Composite pipes
16 x 2 mm, 200 m,
Code no. 088X0001
16 x 2 mm, 500 m,
Code no. 088X0003
Fittings
Press coupling, 16 x 2 mm, Code no. 088X0020
Press coupling, 20 x 2.25 mm, Code no. 088X0021
Screw coupling, 16 x 2 mm, Code no. 088X0025
Screw coupling, 20 x 2.25 mm, Code no. 088X0026
Compression fitting, ¾” x 16 x 2 mm, Code no.
013G4186
Compression fitting, ¾” x 20 x 2.25 mm, Code no.
013G4093
FH PE-RT pipes
16 x 2 mm, 200 m,
Code no. 088X0004
20 x 2.25 mm, 150 m,
Code no. 088X0005
16 x 2 mm, 500 m,
Code no. 088X0006
Tools
FH dispensing
wheel:
for 200 m
▪
pipes, Code
no. 088X0600
for 500 m
▪
pipes, Code
no. 088X0615
Pipe cutter:
for 16-20 mm
▪
pipes, Code
no. 088X0601
Pipe bevelling tool:
for 16 mm
▪
pipes, Code no.
088X0603
for 20 mm
▪
pipes, Code no.
088X0604
Hand press tool:
Code no. 088X0609
Inserts:
for 16 mm
▪
pipes, Code no.
088X0610
for 20 mm
▪
pipes, Code no.
088X0611
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Handbook Danfoss Pipes for Hydronic Floor Heating
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective
companies. Danfoss Heating Solutions and the Danfoss Heating Solutions logotype are trademarks of Danfoss A/S. All rights reserved.
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