Danfoss Air Flex duct systems Installation guide
Danfoss heating solutions
Installation manual for Danfoss
Air Flex duct systems
air.danfoss.com
Index
1 Before you start........................................................................... 3
2 Legislation................................................................................ 3
3 Dimensioning ............................................................................3
4 Positioning manifold......................................................................3
5 Mounting manifold .......................................................................4
6 Mounting inspection hatch ...............................................................5
7 Positioning supply air box on the oor ....................................................5
8 Mounting supply air box on the oor ......................................................6
9 Before casting ............................................................................ 8
10 Positioning of valves on wall and ceiling ..................................................10
11 Mounting valves on wall and ceiling......................................................10
12 Mounting Flex pipes ..................................................................... 11
13 Insulation................................................................................14
14 Sound-damping the system..............................................................14
15 Positioning roof terminals and wall grills..................................................14
2
VI.FY.A2.02_Sep2014 Instructions - Danfoss Air Flex
1 Before you start
In the following pages we will take you through
the steps needed to properly install the duct
system and ttings. If you follow these instructions, you can rest assured that your house will
have a well-functioning and energy-ecient
ventilation system.
The installation manual for Danfoss Air units can
be found in separate material.
Please check the packing list to ensure that the
shipment is complete, and inspect to ensure that
no parts or components have been damaged.
2 Legislation
3 Dimensioning
Please be aware that Danfoss Air Flex systems
are covered by applicable Danish legislation, and
reference is made to:
• Danish Standard DS 428: Code of practice for
technical measures for re protection in ventilation systems
When dimensioning Danfoss Air Flex there are
few, but very important guidelines that must be
followed:
1) We recommend that the combined pressure
loss for fresh air intake + supply does not
exceed 100 Pa.
+ = 100 Pa
Fresh air intake Supply air
2) We also recommend that the pressure loss for
extract + outlet does not exceed 100 Pa.
+
Extra ct Outlet
= 100 Pa
• Danish Standard DS 447: Code of Practice for
mechanical ventilation installations.
3) Main rules when dimensioning:
Flow per pipe Max. pipe length
3
/h 16 m
≤ 25 m
3
25 - 30 m
/h 13 m
4) There should be no more than a 10 m dier-
ence between the shortest and longest pipes
connected to the same manifold.
5) Min. pipe length is 5 m.
Pressure loss values for the individual components can be found in the Danfoss Air Flex
product catalogue.
4 Positioning manifold
Position the manifold (if possible) in the immediate proximity of the Danfoss Air ventilation unit,
or determine its position based on an accompanying assembly drawing (if available).
An assembly drawing should be considered to
be a guide only; if the manifold in the drawing is
positioned unsuitably in relation to the construction or to other technical installations, move the
Manifold placed in insulating material
on the oor before casting.
manifold so that the installation is not unnecessarily hindered.
The manifold can be mounted on walls or the
ceiling, or cast in concrete slabs depending on
what is most appropriate in relation to routing.
Manifold positioned beneath
ceiling inside climate shield.
VI.FY.A2.02_Sep2014Instructions - Danfoss Air Flex
3
5 Mounting manifold
A silencer must be placed between ventilation unit and manifold - for supply as well as
for extract (only supply is illustrated).
The silencer should have the same diameter
as the connecting pipe on the ventilation
unit , and have a length of 600 mm.
Fasten the manifold using the two brackets
mounted beneath the base. Turn the
brackets and fasten them to the substrate.
If it is not possible to use the mounting
brackets, the manifold can be fastened with
metal strapping.
To prevent possible nuisance, place a soft
material (e.g. 2-3 mm of oor underlay)
between the metal strapping and manifold.
Close all unused spigots on the manifold
with a plastic plug, type DEC-77 (item no.
089 F0615).
4
VI.FY.A2.02_Sep2014 Instructions - Danfoss Air Flex
6 Mounting
inspection hatch
When mounting the inspection hatch, cut a hole
in the manifold where the inspection is to be
performed:
max. diameter 150 mm
max 150 x 150 mm
Place the inspection hatch, type DCH-150x150
(item no. 089F0643) over the hole and fasten
with 4 self-tapping screws.
7 Positioning
supply air box
on the oor
Supply air box and grill should ideally be
positioned against the wall at the following
locations:
• beneath a window
• beneath a radiator
• beside a replace/stove
To the extent possible, avoid placing the grill in
the following places:
• underneath furniture
• near places where people relax for longer
periods of time
If an assembly drawing is enclosed, use it for
guidance in positioning the box and grill.
Note!
Installing oor air extract is highly discouraged.
VI.FY.A2.02_Sep2014Instructions - Danfoss Air Flex
5
Loading...