Skov DA 1911 Installation instructions manual

DA 1911 Flange Inlet
Mounting Guide
604466 • 2021-10-18
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DA 1911 Flange Inlet
2 Mounting Guide
Product and Documentation Changes
SKOV A/S reserves the right to change this document and the product herein described without further notice.
In case of doubt, please contact SKOV A/S.
The date of change appears from the front and back pages.
Note
• All rights belong to SKOV A/S. No part of this manual may be reproduced in any manner whatsoever without
the expressed written permission of SKOV A/S in each case.
• All reasonable efforts have been made to ensure the accuracy of the information contained in this manual.
Should any mistakes or imprecise information occur in spite of this, SKOV A/S would appreciate being noti-
fied thereof.
• Irrespective of the above, SKOV A/S shall not accept any liability with regard to loss or damage caused or
alleged to be caused by reliance on any information contained herein.
• Copyright by SKOV A/S.

DA 1911 Flange Inlet
1 Product description........................................................................................................................................4
2 Product survey ...............................................................................................................................................5
2.1 Flange inlet ................................................................................................................................. 6
2.2 Accessories................................................................................................................................ 6
3 Mounting guide.............................................................................................................................................10
3.1 Recommended tools................................................................................................................ 10
3.2 Mounting of sandwich screws................................................................................................ 11
3.3 Wall inlet positioning............................................................................................................... 12
3.4 Mounting inlet ..........................................................................................................................12
3.4.1 Preparing hole in wall................................................................................................................. 12
3.4.2 Mounting the net ........................................................................................................................ 14
3.4.2.1 Net without extension piece ....................................................................................................... 14
3.4.2.2 Net including extension piece .................................................................................................... 14
3.4.3 Mounting using screws .............................................................................................................. 15
3.4.4 Mounting using foam.................................................................................................................. 16
3.4.5 Oblique walls.............................................................................................................................. 17
3.4.6 Final rubber sealant edge .......................................................................................................... 18
3.4.7 Checking the assembly.............................................................................................................. 19
3.5 Mounting the regulation set.................................................................................................... 19
3.5.1 Regulation set with advanced inlet control................................................................................. 19
3.5.1.1 Check the position of the string at advanced inlet control.......................................................... 22
3.5.2 Adjustment of wall inlets ............................................................................................................ 23
3.5.3 Regulation set without advanced inlet control............................................................................ 23
3.6 Mounting of accessories......................................................................................................... 25
3.6.1 Outside flange............................................................................................................................ 25
3.6.2 Inlet funnel on outside flange ..................................................................................................... 25
3.6.3 Inlet funnel on extension ............................................................................................................ 25
3.6.4 Air direction plate ....................................................................................................................... 26
3.6.5 Extension rod ............................................................................................................................. 27
3.6.6 Baffle plate ................................................................................................................................. 28
3.6.7 Regulation set for 2 inlets .......................................................................................................... 29
3.6.8 LPV door set for pull rod ø8 ....................................................................................................... 29
3.6.9 Door set for wire drive................................................................................................................ 30
4 Maintenance..................................................................................................................................................31
4.1 Recycling/Disposal .................................................................................................................. 31
5 Technical data...............................................................................................................................................32
5.1 Dimensioned sketch ................................................................................................................ 33
5.1.1 Flange inlet ................................................................................................................................ 33
5.1.2 Outside flange............................................................................................................................ 34
5.1.3 Inlet funnel ................................................................................................................................. 34
5.1.4 Inlet cover .................................................................................................................................. 34
5.1.5 Light trap for inlet cover ............................................................................................................. 35
5.1.6 Fly screen for inlet cover............................................................................................................ 35
Mounting Guide

DA 1911 Flange Inlet
4 Mounting Guide
1 Product description
Flange inlet DA 1911 is a universal wall inlet which is used for ventilating livestock houses with natural, LPV or
Combi-Tunnel ventilation.
The flange inlet can be adapted to wall thicknesses up to 50 cm employing an extension piece. The inlet is fixed
on the inside wall by screws through the flange itself. It cannot be built or cast directly into wall elements.
The Advanced inlet control of the inlets is patent pending and is supplied with a regulation set which makes it
easy to adjust the air inlet in accordance with the current conditions.
The inlet is easy-to-clean due to its open and smooth construction. Also, the thermoplastic stands high-pressure
cleaning. Furthermore, the choice of material makes the inlet resistant to UV radiation. The inlet is made of high-
impact material; it is dimensionally stable and 100% recyclable.

DA 1911 Flange Inlet
Mounting Guide 5
2 Product survey

DA 1911 Flange Inlet
6 Mounting Guide
2.1 Flange inlet
433161 DA 1911 flange inlet 11 cm
433130 DA 1911 flange inlet with transp. flap
433169 DA 1911 flange inlet 11 cm, coarse net
The flange inlet is supplied with or without coarse net. In addition, there is a
variant with a transparent flap.
The inlet flap is insulated and the springs are made of stainless steel.
The inlet is supplied with regulation kit and AIC.
433131 DA 1911 HP flange inlet 11 cm, coarse net
The flange inlet is supplied with coarse net and reinforced springs.
The inlet flap is insulated and the springs are made of stainless steel.
The inlet is supplied with regulation kit and AIC.
Used if the flange inlets are to be closed at a negative pressure between 65
Pa and 80 Pa.
433165 DA 1911B flange inlet 11 cm
Advanced Inlet Control is not possible for DA 1911B.
The inlet flap is uninsulated and the springs are galvanized.
The inlet is supplied with regulation set.
2.2 Accessories
433166 DA 1911 extension piece 20 cm
Used for wall dimensions from 12 to 28 cm.
433167 DA 1911 extension piece 30 cm
Used for wall dimensions from 17 to 38 cm.
433168 DA 1911 extension piece 40 cm
Used for wall dimensions from 22 to 49 cm.
DA 1911 extension must be used together with the flange inlet when the
wall thickness exceeds 11cm.
433164 DA 1911 net, coarse 65x20 mm
It is used to avoid ingress of birds and larger animals.
Click it directly onto the inlet and outside flange.
One per inlet.
433117 DA 1211/1911 net holder set for 25 inlets
The net holder is used for mounting the net when mounting is required on
the outer wall instead of directly on the inlet, for example, at deep window
openings.
Contains 100 pcs.
One set for each 25 inlets.

DA 1911 Flange Inlet
Mounting Guide 7
433043 DA 1211/1911 screw kit f. flange, 10/5 set
Used for mounting of flange inlet. Contains 40 4.8x70 tapping screws.
433025 DA 1200/1900 screw kit f. flange, 10/5 set
Is used for fastening of net in connection with extensions on DA
1211/1211B/1900 inlets. Includes the required number of 5x30 mm stain-
less screws.
One set for each six inlets.
433137 DA 1911 external flange
Outside flange is used to make a nicer finish on the outside of the building
and the inlet funnel can subsequently be mounted on the flange.
One per inlet.
433136 DA 1911 inlet funnel
Inlet funnel is used to improve performance by up to 22% as well as avoid
the ingress of birds and larger animals.
Click it directly onto the inlet and outside flange.
One per inlet.
433173 DA 1911 air direction baffle, short
DA 1911 air direction baffle is used to adjust the air jet under cold weather
conditions and to avoid adhesion on the wall.
One per inlet.
433172 DA 1911 air direction baffle, long w. side plates
DA 1911 air direction baffle is used to adjust the air jet under cold weather
conditions and to avoid adhesion on the wall.
Long air direction baffle is mounted with side plates.
One per inlet.
560195 DA 1200 regulation set w. long U-shackle
Used where obstacles such as lopsided walls, steel trusses projecting up to
70 mm out from the wall, etc. impede the free movement of the pull rod.
The current system of Advanced inlet control cannot be used with the kit
and therefore an extra string with spring to reduce the slack is included by
which you can make Advanced inlet control.
The inlet flap should as a maximum open to a horizontal position; otherwise
it may overload the winch motor.
One per inlet.

DA 1911 Flange Inlet
8 Mounting Guide
433039 DA 1200 extension piece 240 mm
S433037B DA 1200 extension piece 400 mm, type B
The extension rod is used if you want to run the pull rod round heavy con-
crete pillars or the like, where it is not possible to run the pull rod directly
through the pillar by making a through-going hole. The extension rod is
made of stainless steel.
One per inlet.
401349 All-purpose holder for pull rod
Is applied if the distance between the inlets exceeds 2 m. The distance from
the ceiling to the pull rod is 6.5 cm when the all-purpose holder is mounted.
Mounted vertically with 2 screws in the ceiling.
433021 DA 1200 regulation set for 2 inlets
DA 1200 regulation set for 2 inlets at different heights.
A pull rod row for each row of inlets is preferred and using 433021 should
therefore be regarded as a cheaper alternative.
One for each inlet in the upper row.
413214 LPV door set for pull rod 8 mm
If there are doors or the like in the wall where the inlets are mounted and
you temporarily want to end the pull rod, a special kit containing the neces-
sary parts can be acquired. The kit makes it possible to manually maintain
correct ventilation level and easily reestablish the pull rod.
One per door.
413223 Door set for wire tension
The mounting set is used where the pull rod is directed along the door
frame by means of wire and reels.
One per door.
433174 DA 1900 inlet cover
DA 1900 inlet cover can be used together with the inlets of the DA 1900 se-
ries.
The inlet cover is designed to protect the livestock house against rain/snow
and to provide a certain amount of wind and light dimming effect.
One per wall inlet.

DA 1911 Flange Inlet
Mounting Guide 9
433313 DA 1900 light trap for inlet cover
DA 1900 inlet light trap can be used together with the inlets of the DA 1900
series.
The light trap prevents a large amount of daylight from seeping into the
building ("brown out"). The light trap is made of injection-moulded PP
(polypropylene) which is dirt-repellent and easy to clean.
Use one for each DA 1900 inlet cover.
433335 DA 1911 fly screen
DA 1911 1900 fly screen for inlet cover is always used together with DA
1900 inlet cover.
The fly screen prevents the ingress of flies and the screen is self-support-
ing.
Can only be used for inlets in 1 row.
With regular and sufficient cleaning, the capacity of the inlet is not reduced
by the use of the fly screen.
One per inlet
433317 Fly screen - 25 m x 1.37 m
Fly screen on a roll prevents the ingress of flies.
With regular and sufficient cleaning there will be no significant pressure
loss, but an emergency opening should be provided via bypass in case the
fly screen is choked.
Use 1 m2 fly screen per 2000 m3/h max. air.
433139 DA 1911 hen net, hinged
The hen net prevents the fledged hens from sitting in the air inlet. The net is
top-hinged, allowing easy access when servicing the inlet.
Screw kit (560333) is ordered separately.
560333 Screw kit DA 1200/1911 hen net
The screw kit is used to mount the hen net.
1 set per hen net.

DA 1911 Flange Inlet
10 Mounting Guide
3 Mounting guide
Check that all ordered parts are present and undamaged prior to starting the work. Read the directions carefully
before starting mounting.
3.1 Recommended tools
See a list of tools recommended for the installation of the flange inlet below.
Item Description
Cordless drill
Jigsaw
Saw
Hammer
Screwdriver
Sealant gun
Marker pen
Tape measure
Spirit level
Water pump (multi-grip) pliers
Utility knife
Chisel
Try square

DA 1911 Flange Inlet
Mounting Guide 11
Item Description
Atomizer
Wedge
Foam gun
Ladder
3.2 Mounting of sandwich screws
To ensure that the screw makes the right thickening and the best possible thread on the back, the correct hole
must be drilled first and the screwing must be done with the correct momentum depending on the thickness of
the metal in the sandwich panel.
Diameter of
screw [mm]
Thickness of metal in
sandwich panel
[mm]
Size of holes in
sandwich panel
[mm]
Tightness
torque
[Nm]
5
0.63 - 0.75 ø3.8 2.5
0.75 - 0.88 ø4.1 3.0
0.88 - 1.00 ø4.2 3.5
1.00 - 1.25 ø4.3 3.5
1.25 - 1.50 ø4.4 4.0

DA 1911 Flange Inlet
12 Mounting Guide
3.3 Wall inlet positioning
The positioning of the inlet in a wall depends on the layout of the building and the house layout. The positioning
may therefore only be made according to directions communicated by SKOV A/S or representatives of the com-
pany.
The inlet must be placed horizontally in the wall. The inlet flap should be pointing into the livestock house.
Place the insulation of the brickwork against the inlet all the way round (like in other categories of constructions).
This way you prevent a cold bridge along the side of the inlet from being formed.
The inlet is fixed on the inside wall by screws directly through the flange itself, see section Mounting using
screws. In connection with brick and concrete walls, use mounting foam to fix the inlet, see section Mounting
using foam [}16].
3.4 Mounting inlet
3.4.1 Preparing hole in wall
Mark out the correct number of holes according to measurements. Be aware of tolerance.
Distance to coil spring
Min. distance between holes
Min. distance to the wall on the
tensile side, see table below
1200 mm xxx mm
280 mm
Distance to the ceiling
100 mm
*Including extension
*850 mm
840 mm
*850 mm
840 mm
*285 mm
270 mm
Positioning of actuator Min. distance to the wall on the tensile side
[mm]
Min. 2100 mm
637 mm
637
700 mm 950 mm
1650
Min. 2100 mm
2100

DA 1911 Flange Inlet
Mounting Guide 13
Remember always to use a spirit level.
Drill 4 holes of roughly 10 mm right through the wall.
Cut the holes.

DA 1911 Flange Inlet
14 Mounting Guide
3.4.2 Mounting the net
3.4.2.1 Net without extension piece
Mount the net on the inlet until the click engages.
Push the inlet incl. the net through the hole in the wall.
Note that the net must face the right way. The Made in
Denmark inscription must be to the right.
3.4.2.2 Net including extension piece
Push the extension onto the inlet.
Mount the net on the extension by means of 6 screws.
Push the inlet into wall hole.

DA 1911 Flange Inlet
Mounting Guide 15
3.4.3 Mounting using screws
Make sure that the inlet flap closes tightly: In
case of oblique walls, you have to make sure not to
tighten the screws too much so the inlet frame be-
comes oblique; the inlet flap is then not able to close
tightly, see the section Oblique walls [}17].
Place the inlet in the middle of the hole. Avoid pushing
the inlet into place during mounting.
Drill ø6 mm holes indicated by the center marks in the
outside frame of the inlet.
Use 6 center marks. 3 in the upper flange and 3 in the
lower flange.
Use the holes to mark out holes in the wall.
Center mark or 2 mm hole when mounting in a sand-
wich panel. Material thickness ≤ 1mm.
4 mm hole when mounting in steel profiles.
Material thickness >1 mm ≤ 2 mm.
4.5 mm hole when mounting in steel profiles.
Material thickness >2 mm ≤ 4 mm.
Recommended screw: Tapping screw 4.8x70 A2.
Recommended tightening: 5.1 Nm.
Mount the inlet on the wall using screws.
Make sure not to over-tighten the screws as they are
tightened directly against plastic.

DA 1911 Flange Inlet
16 Mounting Guide
3.4.4 Mounting using foam
SKOV A/S recommends using single-component polyurethane foam or similar.
Check before foaming how much the foam expands.
Place the inlet in the middle of the hole. Avoid pushing
the inlet into place during mounting.
Fix it using smooth wedges/distance pieces. Place the
wedges at each end in order not to press the inlet.
Make sure that the inlet flap closes tightly.
Remove the wedges again after pointing.
Point the inlet as shown in the photo. The inlet is
pointed in the entire depth of the inlet in the corners
and approx. 100 mm to each side of the corners. It is
important only to seal the edge in the middle of the inlet
as the joint would otherwise make the inlet skew. We
recommend using a sealant gun.
Wet the joint faces with water from a
mist sprayer before proceeding with
the pointing.

DA 1911 Flange Inlet
Mounting Guide 17
Point the inlet fully by filling the joint 10 mm from the
front edge of the wall.
Push the joint sealer towards the inlet when the sealer
has dried a little to make room for repointing using a
rubber sealer.
Wet the joint with water from a mist sprayer.
Wait until the next day to ensure that the mounting
foam is dry before applying the final rubber sealer, see
the section Final rubber sealant edge [}18]
3.4.5 Oblique walls
If the inside wall is oblique, it may be necessary to
mount a heavy-duty plate or wedges between the inlet
and the wall in order to avoid distortion of the inlet.
It is important to adjust the distortion when mounting in
oblique walls. Otherwise, the inlet flap does not close
tightly after the inlet is inserted.
Place the inlet in the hole and fasten it with 1 screw/
foam in one of the corners. Push the opposite end of
the inlet against the wall in order to check whether the
inlet flap closes tightly.
If this is not the case, the frame of the inlet must be
aligned by means of wedges.

DA 1911 Flange Inlet
18 Mounting Guide
Use the 2 embedded wedges to align the inlet.
If no alignment is required, remove the wedges so they
do not hamper the air current.
Each time a screw is tightened, check that the inlet flap
still closes tightly. Otherwise, you must adjust the
wedges until the inlet flap closes tightly again.
Remove the redundant part of the wedge when all the
screws have been tightened.
3.4.6 Final rubber sealant edge
SKOV A/S recommends Sikaflex 111 Stick & Seal.

DA 1911 Flange Inlet
Mounting Guide 19
Apply a sealing edge between the inlet and the wall -
both on the inside and the outside.
If the distance between the wall and the edge of the in-
let exceeds 6 mm, sealant tape can be used before
making a sealing edge.
3.4.7 Checking the assembly
Check that all the edges are tight and that the inlet flap
closes tightly at both ends.
3.5 Mounting the regulation set
3.5.1 Regulation set with advanced inlet control
(A)
(B)
(C)
(D)
(E)
It is recommended to mount the regulation set before the in-
let is mounted in the wall.
The regulation set including filler plug is located in a bag be-
hind the flap.
(A) Clamp for pull rod
(B) U-shackle with reel
(C) Nylon string
(D) Reel
(E) Lock for U-shackle
The picture illustrates various kinds of mounting and pull to
the right and left side respectively.
Place the clamp as shown; clamp must be placed identically
along the entire length of the pull rod.

DA 1911 Flange Inlet
20 Mounting Guide
Press U-shackle with reel into place or tap the shackle gen-
tly with a hammer.
The big reel must have an end backlash of 0.5 - 1 mm.
Disassembly is preferably done with pliers and tapping with
a hammer.
Mount the filler plugs included.
Only when all reels have been mounted, the pull rod is
pushed into place.
Place the screw in the clamp on the pull rod.