Danfoss air units and duct systems Installation guide

Brand: Danfoss

Model: air units and duct systems

Type: Installation guide

Danfoss Air

Installation manual for Danfoss air units and duct systems

DANFOSS HEATING SOLUTIONS

MAKING MODERN LIVING POSSIBLE

Instructions Index

Index

VIEWA402

1 The Danfoss Air system

1.1 The Danfoss Air system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Before you start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Unit installation

2.1 Installation of Air unit and condensate duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3 Wireless connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.4 Setting up main air volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3 Technical data

3.1 Dimensions - w1 unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

3.2 Dimensions - w2 unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.3 Dimensions - a2 unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.4 Dimensions - a3 unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.5 Detail - front panel removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.6 Technical data - w1 unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.7 Technical data - w2 unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.8 Technical data - a2 unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.9 Technical data - a3 unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4 Menu

4.1 Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

4.2 System reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5 Valve installation

5.1 Location of valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

5.2 Drilling holes in the ceiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.3 Installing the valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6 Installing the duct system

6.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.2 Adaptation of ducts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.3 Connecting the duct system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.4 Insulating the duct system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

6.5 Sound damping of the duct system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

6.6 Roof terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

6.7 Adjusting the valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

7 Setting up

7.1 Setting up the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

1.1 Danfoss Air System

1.2 Before you start

Instructions The Danfoss Air System

VIEWA402

Congratulations on purchasing Danfoss Air, one

of the most advanced, eﬃcient and quiet

ventilation systems with heat recovery on the

market.

On the following pages, we will take you through

the steps needed to properly install the duct

system and valves. If you follow these instruc-

tions, you can rest assured that your house will

have a well-functioning energy-eﬃcient system.

This installation manual acts as a step-by-step

guide. For best results simply follow the instruc-

tions in the order they are given.

Please check that the shipment is complete

and has not been damaged. The ventilation unit

consists of:

• Wirelessremotecontrol-calledAirDialbelow

(4 AAA batteries included)

• Acommunicationmodule-henceforththe

CCM module

• Apowercable

• Acommunicationcable

• Awallbracket,incl.rubberstripandtworub-

ber separators (only w models)

• Aninstallationmanual(this)

• Auserguide

• Aquickguide(locatedbehindwallplateon

the wireless remote)

If you have ordered the complete Danfoss Air

Solution, there will be a complete packing list that

also follows the duct system. Please check that

packing list matches supplied components.

Instructions Unit installation

2.1 Installation of Air unit

and condensate line

Instructions for Air Units a

and a

– ceiling

units

On delivery, the connectors will be inverted to

save space. Pull out the spigots.

Turn the spigots around and mount using the

tapping screws included. If a power drill is used,

the lowest torque setting should be used.

The unit should be placed on a platform, made

as a sandwich of 16 mm plywood or MDF sheet,

sandwiched around a 50 mm wall batts. It is very

important that the unit is mounted completely

horizontal. Use spirit level to check.

Check adjustment

Please note! A siphon must always be ﬁtted

on the unit. The siphon is a Danfoss accessory

which must be ordered separately.

Hose clamp

3/4” re-inforced hose

3/4” threaded ﬁtting

Siphon installation - correct



Insulate

condensate

line

(frost proof)

Joist

Siphon

To drain

16 mm plywood

or MDF (2)

50 mm high

density

insulation

batts

Power supply

and connection

of CCM module

Siphon installation - wrong!



Joist

Siphon

To drain

If the unit is tilted, the function of the conden-

sate drain cannot be guaranteed, with risk of

water leakage as a result!

Mount the siphon on the rafter below the unit

or mount it in the room below the attic. If you

choose to mount your siphon in the attic, the

condensate duct must be made frost-proof.

Connect the pipe from the siphon to the conden-

sate spigot on the outlet. Lead the connected

pipe to the outlet, allowing for a gradient of min.

1 cm/metre.

Important: Remove front panel, and foam front

panel. Fill condensate tray, check the outlet and

reassemble.

Attic units a

and a

top view

Service area

Condensate drain

Ø19 (smooth)

Supply air

Exhaust air

Outdoor air (intake) 

Discharged air 

Power supply and

connection of CCM module

Important

Allow for 60 cm free space in front of unit, to

assure service access.

VIEWA402

Instructions Unit installation

VIEWA402

Wall Air units instructions w

& w

Place the wall mounting bracket on wall in

desired position, 75 mm from the bottom of the

bracket to the top of the unit, mark up- and drill

holes. Use screws suitable for the wall surface

(screws are not included).

Very important!

Ensure that the bracket is level.

Now hang unit onto wall

bracket, attach self-adhesive

foam blocks to lower rear

location on unit back plate

(absorbs potential vibrations

from unit to wall). Mount the siphon on the wall

below the unit.

Now ﬁt the pipe from the siphon onto the sys-

tem’s condensate connector using the attached

pipe clip. The condensate is led from the siphon

on to the nearest outlet with a gradient of min.

1cm/metre. The condensate line must be insu-

lated where risk of freezing occurs.

Important: Remove front panel, and foam front

panel. Fill condensate tray, check the outlet and

reassemble.

75 mm

Rubber

separator

Detail A

Wall unit Top view

Condensate con-

nection

located here

(below unit)

Important

Allow for 60 cm

free space in

front of unit, to

assure service

access.

Instructions Unit installation

Ø19 mm

plastic pipe

Hose clamp

3/4” pipe

3/4” coupling

VIEWA402

Instructions Unit installation

2.2 Electrical installation

VIEWA402

Here is how

1. Connect power cable.

2. Plug in communication cable between com-

munication module and Air unit.

The cable cannot be ﬁtted wrongly.

Important

If the communication module is mounted in

diﬀerent ﬂoor than wireless remote, please check

if the deck construction contains elements that

will reduce transmission/receiving strength (i.e.

aluminum foil clad insulation material, or metal

grid, if deck is cast in concrete). If any such distur-

bances are present, the communication module

should be placed in same ﬂoor as wireless remote

control.

If an ethernet connection is already available in

the vicinity of the Air unit, place the communi-

cation module close to this, to allow for future

connection to PC.

Mounting CCM module in wall bracket

1. Hook the CCM on the wall bracket.

2. Press downwards to click the CCM into place.

Dismantling CCM module from wall bracket

1. Press in the two latches on the side.

2. Pull the CCM upwards.

NOTE:

If accessories are ﬁtted (electrical preheating,

electrical afterheating, water heating surface or

geothermal surface), the pin on terminals 5 and

6 must be removed on the ventilation system

plug. See also the instructions included with the

accessories.

Communication cable

Power cable

Connection board (located

on underside of wall units,

or in end of attic units)

Communication module

(also has possibility of USB

or Ethernet connection)

White/orange

Orange

Black

White/blue

Blue

Black

Instructions Unit installation

2.3 Wireless connection

Upon ﬁrst power up of CCM module, the green

LED will ﬂash slowly - this indicates that the CCM

module has yet to be connected to the Air Dial.

To connect the Air Dial insert batteries. The Air

Dial will open up in a special mode, that leads the

installer through a step-by-step guide.

Follow the instruction in the guide:

1. Set language.

2. Create network (press button on CCM module

and then press ‘Air Dial’).

3. Set basic step (setting up the main air volume).

4. Finish.

If the connection attempt is successful, the green

LED light up.

If the connection fails, the red LED on the com-

munication module will ﬂash 5 times at low

speed. A failed connection will also be visible on

the wireless remote.

Troubleshooting if wireless connection fails:

• Connectiontowirelessremotewasnotat-

tempted within 2 minutes from pushing button

on the CCM - try again.

• Otherwirelessunitsinthevicinityareattempting

to connect to the CCM module - retry.

• Iftheabovedoesnotsolvetheproblem,there

is most likely inadequate signal strength. The

distance between the CCM module and the Air

Dial may be too great, or there is an obstacle

between the two devices.

If necessary, move the CCM module to the

same ﬂoor in the building and/or move it

closer to the Air Dial.

The communication cable can be lengthened

up to 200 m. Use a screened, double-twisted

cable with cross-section 24 AWG. Lengthen the

cable at the end with the wide 6-pin plug with

the ﬁnger terminals. Remember to reﬁt the pin

between terminals 5 and 6 (unless a heating

surface has been ﬁtted).

CCM moduleAir Dial

Installation of Air Dial - optimum placement

When mounting the Air Dial, please place according

to following guidelines to ensure best possible

accuracy (Air Dial has integrated temperature

sensor).

• Installatheightof80-150cmaboveoor

• Mountwhereremoteisclearofcurtains

• Mountinoccupiedzonewheretemperatureis

representative

• Donotmountinbathrooms

• Donotmountindirectsunlight

• Donotmountontoouterwall

• Donotmountdirectlyaboveheatsource

Carry out link test before the Air Dial is

mounted permanently on the wall

When the Air Dial has been registered on the

system, a link test should be carried out to ensure

that send/receive conditions are suﬃcient for the

required location. To carry out a link test:

1. Hold down the Air Dial button for 5 seconds.

The hidden Service menu appears (disappears

automatically after one hour).

2. Select the Link Test menu.

3. The Air Dial then tells you if the conditions are

satisfactory or not.

If the link test fails, the distance between the

CCM and the Air Dial is either too great or there

are metallic objects between the Air Dial and the

CCM which are disrupting the wireless connec-

tion. See troubleshooting above.

Mounting the Air Dial in wall bracket

VIEWA402

Instructions Unit installation

2.4 Balancing of

the main air volumes

VIEWA402

Why should you balance the system?

To achieve the best possible performance, it is

vital to balance the main air volumes. A balance

should be found between the main air volumes

in the house (this will contribute to protecting

the house against fungus and dry rot).

Setting up with low outdoor temperatures

If the outdoor temperature is below -3°C, the

system should not be balanced/commisioned as

the system will go into frost protection mode. A

ﬂashing icon will show this on the display.

Note! If forced to balance a unit at outdoor air

temperatures below -3°C, remove power from

the ventilation unit for 20 seconds. The system can

then be balanced for up to 1½ hours, after which

the frost protection mode will again become

active (if conditions apply).

How to balance the main air volume -

Danfoss supplied the complete duct system

1. Remove front panel from unit (you do not need

tools, simply pull lightly at handles).

2. See the drawing of the duct system included.

Here you will ﬁnd suggested pre-setting values

for all air valves. Close valves completely, and

turn them full turns towards ”open” (number of

turns as indicated on the duct system drawing).

If dampers are included in the system, open

these completely before set-up is commenced.

3. Mount measuring tubes between the unit’s

measuring spigots on the exhaust side (see

illustration above) and diﬀerential pressure

gauge.

4. Find the required ﬂow on the system diagram

(blue sticker) with the corresponding diﬀerential

pressure value. This is the pressure the measur-

ing equipment must show to ensure that the

ﬂow is = as required. If the pressure is too low,

adjust the fan step upwards until you reach the

required pressure. Now move the measuring

tubes over onto the opposite measuring points

and use the same procedure to set up the sup-

ply air. All that remains is a quick ﬁne-tuning

of the room air volumes as the presettings

are usually close to the required ﬂow. See also

page 20 for further details about set-up.

Setting up a system that is operational, but

has not yet been adjusted

Press Air Dial for 5 seconds. The hidden Service

menu appears. In the Service menu, press ”set

basic step” to activate the special commissioning

mode (where all outside inﬂuences are blocked

– the installer controls the exhaust and supply

air fans completely with 1-100% fan speed). The

Service menu remains visible for one hour and

then disappears.

How to balance the main air volume in a duct

system provided by a diﬀerent supplier:

1. Remove front panel from unit (you do not need

tools - simply pull ﬁrmly on handles). When

setting up systems for which Danfoss has not

dimensioned the duct system, set the supply

and exhaust valves in accordance with the

instructions of the project manager.

2. Mount measuring tubes between the unit’s

measuring spigots on the exhaust side (see illus-

tration above) and diﬀerential pressure gauge.

3. Find the required ﬂow on the system diagram

(blue sticker) with the corresponding diﬀer-

ential pressure value. This is the pressure the

measuring equipment must show to ensure

that the ﬂow is = as required. If the pressure is

too low, adjust the fan step upwards until you

reach the required pressure. Now move the

measuring tubes over onto the opposite meas-

uring points and use the same procedure to set

up the supply air. All that remains is to set up

the room air volumes.

After the main air volumes have been adjusted, the

set-up of individual valves needs to be carried out.

In most cases, this will entail minor changes to the

chosen basic steps, but this can be done in the room

by adjusting the valves.

How to measure

supply

How to measure

exhaust

Instructions Technical data

3.1 Dimensions - w

unit

Weight of unit: 31 kg

430 (incl. wall bracket)

530

Ø125

Supply

Ø125

Outdoor air

Ø125

Extract

Ø125

Exhaust

1000 (1042 incl. connectors)

95 170

Service side Service side

170

110

120

Top view Top view

Front view

1 2

3 4

Filter reset button

Isometric drawing

(frontpanel removed)

Optional supply air connector located on bottom of w1. To

use, remove top supply air connector by loosening screws,

remove lid from the bottom connector, and use this to seal

of the normal supply air connector. Then ﬁt the supply air

connector on bottom.

Supply

(Located

at bottom)

115

Filter,

supply air

Filter,

extract air

Diﬀerential

pressure for

extract air

Diﬀerential

pressure for

supply air

Flow chart

(for set-up)

Diﬀerential

pressure for

extract air

Diﬀerential

pressure

for supply air

VIEWA402

Instructions Technical data

3.2 Dimensions - w

unit

VIEWA402

1 2

3 4

Weight of unit: 45 kg

580 (incl. wall bracket)

590

Ø160

Supply

Ø160

Outdoor air

Ø160

Extract

Ø160

Exhaust

1050 (1094 incl. connectors)

110 185 185

126

143

120

Top view Top view

Front view

Filter reset button

Isometric drawing

(frontpanel removed)

Filter,

supply air

Filter,

extract air

Diﬀerential

pressure for

extract air

Diﬀerential

pressure for

supply air

Flow chart

(for set-up)

Diﬀerential

pressure for

extract air

Diﬀerential

pressure for

supply air

1180

600

550

528

780

160

Ø250

318

440

Instructions Technical data

1180

600

580

32515

177

450

Ø160

550

Extract air

Exhaust airSupply air

Outdoor air

Exhaust

Outdoor air

Extract air

Supply air

Outdoor air

Exhaust

Diﬀerential pressure

for extract air

Diﬀerential pressure

for extract air

Diﬀerential pressure

for supply air

Diﬀerential pressure

for supply air

Filter reset button

Filter, supply air

Filter, exhaust air

Flow chart

(for balancing)

Weight of unit: 52 kg

Exhaust air

Outdoor air

Front view

Front view (without front panel)

Right view

Condensate drain

connection (on back)

Condensate drain

connection (on back)

3.3 Dimensions - a

unit

3.4 Dimensions - a

unit

3.5 Details - front panel removed

Weight of unit: 67 kg

VIEWA402

100

110

120

130

140

150

160

170

180

190

200

25 50 75 100 125 150 175 200 225 250 275 300

P ext. [Pa]

/h]

SFP 1200

Flow properties / Strömungsverhältnisse / Luftdata

60 100 140 180 220 260 300

[m3/h]

Dry efficiency / WRG trocken / Tør virkningsgrad

Eta T [%] acc. EN 308 / Laut EN 308 / Jf. EN 308

Flow Pext. SFP P

tot.

[m3/h] [Pa] [J/m3] [W]

100 35 720 20

100 55 792 22

140 60 951 37

140 70 1029 40

180 70 1080 54

180 100 1300 65

Typical operation / Typische Arbeitspunkte

Typiske driftspunkter

(1) L

(A)

(2) L

(A)

(3) L

(A) Unit / Gerät / Anlæg til rum: 50

125

250

500

1000

2000

4000

dB(A)

(4) L

(A)

(5) L

(A)

(6) L

(A) Unit / Gerät / Anlæg til rum: 55

125

250

500

1000

2000

4000

dB(A)

(1) Exhaust / Abluft / Udsugning @ 140 m3/h

(2) Supply / Zuluft / Indblæsning @ 140 m3/h

(3) Hard room / Harter raum / hårdt rum @ 140 m3/h

(4) Exhaust / Abluft / Udsugning @ 180 m3/h

(5) Supply / Zuluft / Indblæsning @ 180 m3/h

(6) Hard room / Harter raum / hårdt rum @ 180 m3/h

Danfoss Air w

By condensation up to 95%

Bei Kondensation bis zu 95%

Ved kondensering op til 95%

100%

84%

35%

SFP 1000

66%

100

110

120

130

140

150

160

170

180

190

200

25 50 75 100 125 150 175 200 225 250 275 300

P ext. [Pa]

/h]

100%

67%

45%

82%

SFP 1200

SFP 1000

SFP 800

Flow properties / Strömungsverhältnisse / Luftdata

60 100 140 180 220 260 300

[m3/h]

Dry efficiency / WRG trocken / Tør virkningsgrad

Eta T [%] acc. EN 308 / Laut EN 308 / Jf. EN 308

Flow Pext. SFP P

tot.

[m3/h] [Pa] [J/m3] [W]

160 50 720 32

220 70 867 53

220 100 1047 64

260 70 997 72

260 100 1163 84

300 90 1200 100

Typical operation / Typische Arbeitspunkte

Typiske driftspunkter

By condensation up to 95%

Bei Kondensation bis zu 95%

Ved kondensering op til 95%

(1) L

(A)

(2) L

(A)

(3) L

(A) Unit / Gerät / Anlæg til rum: 60

125

250

500

1000

2000

4000

dB(A)

(4) L

(A)

(5) L

(A)

(6) L

(A) Unit / Gerät / Anlæg til rum: 63

125

250

500

1000

2000

4000

dB(A)

(1) Exhaust / Abluft / Udsugning @ 220 m3/h

(2) Supply / Zuluft / Indblæsning @ 220 m3/h

(3) Hard room / Harter raum / hårdt rum @ 220 m3/h

(4) Exhaust / Abluft / Udsugning @ 260 m3/h

(5) Supply / Zuluft / Indblæsning @ 260 m3/h

(6) Hard room / Harter raum / hårdt rum @ 260 m3/h

Danfoss Air w

Instructions Technical data

3.6 Technical data - w

unit

3.7 Technical data - w

unit

VIEWA402

100

110

120

130

140

150

160

170

180

190

200

25 50 75 100 125 150 175 200 225 250 275 300

P ext. [Pa]

/h]

100%

67%

45%

82%

SFP 1200

SFP 1000

SFP 800

Flow properties / Strömungsverhältnisse / Luftdata

60 100 140 180 220 260 300

[m3/h]

Dry efficiency / WRG trocken / Tør virkningsgrad

Eta T [%] acc. EN 308 / Laut EN 308 / Jf. EN 308

Flow Pext. SFP P

tot.

[m3/h] [Pa] [J/m3] [W]

160 50 684 30

220 70 824 50

220 100 995 61

260 70 947 68

260 100 1105 80

300 90 1140 95

Typical operation / Typische Arbeitspunkte

Typiske driftspunkter

By condensation up to 95%

Bei Kondensation bis zu 95%

Ved kondensering op til 95%

(1) L

(A)

(2) L

(A)

(3) L

(A) Unit / Gerät / Anlæg til rum: 51

125

250

500

1000

2000

4000

dB(A)

(4) L

(A)

(5) L

(A)

(6) L

(A) Unit / Gerät / Anlæg til rum: 54

125

250

500

1000

2000

4000

dB(A)

(1) Exhaust / Abluft / Udsugning @ 220 m3/h

(2) Supply / Zuluft / Indblæsning @ 220 m3/h

(3) Hard room / Harter raum / hårdt rum @ 220 m3/h

(4) Exhaust / Abluft / Udsugning @ 260 m3/h

(5) Supply / Zuluft / Indblæsning @ 260 m3/h

(6) Hard room / Harter raum / hårdt rum @ 260 m3/h

Danfoss Air a

100

110

120

130

140

150

160

170

180

190

200

50 100 150 200 250 300 350 400 450 500 550 600

P ext. [Pa]

/h]

SFP 1200

Flow properties / Strömungsverhältnisse / Luftdata

200 250 300 350 400 450 500

[m3/h]

Dry efficiency / WRG trocken / Tør virkningsgrad

Eta T [%] acc. EN 308 / Laut EN 308 / Jf. EN 308

Flow Pext. SFP P

tot.

[m3/h] [Pa] [J/m3] [W]

200 70 900 50

350 70 802 78

450 70 832 104

450 100 1080 135

Typical operation / Typische Arbeitspunkte

Typiske driftspunkter

By condensation up to 95%

Bei Kondensation bis zu 95%

Ved kondensering op til 95%

(1) L

(A)

(2) L

(A)

(3) L

(A) Unit / Gerät / Anlæg til rum: 57

125

250

500

1000

2000

4000

dB(A)

(4) L

(A)

(5) L

(A)

(6) L

(A) Unit / Gerät / Anlæg til rum: 61

125

250

500

1000

2000

4000

dB(A)

(1) Exhaust / Abluft / Udsugning @ 350 m3/h

(2) Supply / Zuluft / Indblæsning @ 350 m3/h

(3) Hard room / Harter raum / hårdt rum @ 350 m3/h

(4) Exhaust / Abluft / Udsugning @ 450 m3/h

(5) Supply / Zuluft / Indblæsning @ 450 m3/h

(6) Hard room / Harter raum / hårdt rum @ 450 m3/h

Danfoss Air a

100%

SFP 1000

55%

79%

SFP 800

Instructions Technical data

3.8 Technical data - a

unit

3.9 Technical data - a

unit

VIEWA402

Instructions Menu

The Service menu is activated by pressing the Air

Dial button for 5 seconds.

In the Service menu the installer can set

individual functions to which it is not desirable

that the end user has access.

If the installer is dealing with a system where for

some reason there is a need to reset the system,

it should be done as follows:

1. If the system has already been balanced, the

basic steps used must be noted on a piece of

paper for later use. This is done by going into

the following menu item and reading the fan

steps for both the supply and exhaust fans:

Service > Info > basic steps

2. Remove the batteries from the Air Dial and

insert them again. While the last battery is

inserted, hold down the button - continue to

hold down the button until you hear a beep

from the Air Dial. The Air Dial is now ready in

start-up mode.

3. Remove the supply or communication cable

connecting the unit to the communication

module - hold down the button on the

communication module while you reconnect

the cable. Continue to hold down the button

on the communication module for 5 seconds

until only the green LED is ﬂashing.

4. The system has now been reset to its factory

settings and can be registered as described in

Chapter 3.

If you noted the system’s basic steps in Point 1

above, these are the values that you should use

when the Air Dial asks for the required basic step

during the registration procedure.

Service

Back

Info  

As normal, but fan steps are displayed without being rounded oﬀ

Set ﬁlter timer  

Set ﬁlter period

Set language  

Select required language on Air Dial

Set basic step  

Set-up mode, installer controls both fans 0-100%

Link test  

Used to test the wireless connection

4.1 Service menu

4.2 System reset

VIEWA402

Instructions Valve installation

Start by deciding on the location of the valves,

using the enclosed technical drawing as a

guideline. If the drawing indicates a valve which

is in the path of electrical wiring, water ducts or

wooden joists, for example, the ﬁttings can of

course be moved so that installation is not made

unduly diﬃcult.

Guidelines for valve locations:

Air diﬀusion

Try to avoid placing air diﬀusion valves above

places where people may be located for long pe-

riods such as above sofas, beds, dining table, etc.

If the house has a wood-burning stove, it is best

to position the air diﬀusion valve nearby.

Extraction

Designed to remove moist ”contaminated” air

and should therefore be positioned as close as

possible to the source, i.e. above washbasins, in

shower cabinets, etc.

Use a cup drill/hollow drill to drill the holes for

the valves. Use the following drill sizes: For valves

that are 100 mm in diameter (both diﬀusion and

extraction) use a hollow drill with a diameter of

108 mm. For valves that are 125 mm in diameter

(both air diﬀusion and extraction) use a hollow

drill with a diameter of 133 mm.

NOTE:

• Avoiddamagingthedampcourseunneces-

sarily and always remember to repair it with

weatherproof tape from the ceiling side after-

wards.

• Thesizeandshapeofthevalvesvariesdepend-

ing on the air direction and volume.

Supply air valve

Extract air valve

5.1 Location of valves

5.2 Drilling holes in the

ceiling

VIEWA402

Instructions Valve installation

Fix the bayonet socket that will hold the valve to

the ceiling. If it is a gypsum ceiling, we recom-

mend putting a wooden plate on the back for

the screws to bite into. If the duct needs to pass

through insulation, we recommend measuring

the insulation section and installing a duct sec-

tion along a suitable length of the bayonet socket

(VGU or VGM). Use an NPU connection nipple to

connect the VGM and the duct section.

200

5.3 Installing the valves

VIEWA402

Instructions Installing the duct system

Use a hacksaw or angle grinder to adjust the

ducts. We recommend ﬁling down or cutting oﬀ

any sharp edges on the duct in order to avoid

damage to the rubber seals on the ﬁtting parts.

NOTE:

• Alwaysuseappropriateprotectiveequipment

(i.e. protective goggles, ear defenders, etc.)

Pic. 1

To get the best out of the system and to achieve

optimum operational eﬃciency, you should

install the duct system as compactly as the build-

ing construction will allow. In practice, this means

that you should keep your duct sections as short

as possible and use as few bends as possible in

order to achieve the lowest possible loss of pres-

sure in the system. If the ducts are located on the

loft ﬂoor, they can be secured using duct clips.

Duct clips can also be used if the duct system is

suspended from the roof, using

UV ﬁxing hangers, if required (Picture 1).

NOTE:

• Itisimportantthattheductsdonotrestonthe

valves or hang in the roof terminals.

• Werecommendpositioningtheductsinthe

insulation, in order to minimise heat loss as far

as possible. See the section on insulation.

• Itisimportanttoplaceasoftmaterialbetween

the duct and the rafters/duct clip in order to

avoid any vibration noise.

• Alwaysavoidinstallingdamagedproducts,

such as dented ducts, as this may reduce the

performance of the system and can result in

leaks.

Example

duct installations…

6.1 In general

6.2 Adaptation of ducts

VIEWA402

Instructions Installing the duct system

Push connectors into the duct up to the stop stick;

turning them slightly will make assembly easier.

Fix the connectors to the duct using self-tapping

screws or pop rivets. Screws/pop rivets should be

evenly distributed around the circumference. Fix

screws/pop rivets so that the safe rubber strips

are not damaged, i.e. 10 cm from the stop stick

line at the end of the duct.

In the event of incorrect assembly, screw/pop

rivet holes should be sealed up.

We recommend adhering to the following mini-

mum number and dimensions for steel screws/

pressure-resistant pop rivets:

Ød Min. Ød mm Number

63-125 3.2 2

140-250 3.2 3

The ducts supplied are 3 metres long as standard.

If you want to connect two ducts together, use

an NPU nipple with a rubber strip.

Stopsick

Ø 100

Ø 125

Ø 100

Ø 125

Ø 125 RCFU

NPUSR SR

Ø 125Ø 125 RCFURCFU

TCPU

Ø 100

Ø 125

Ø 100

Ø 125

Ø 125 RCFU

NPUSR SR

Ø 125Ø 125 RCFURCFU

TCPU

Reductions

If you want to reduce a branch, you can use a

T-section, where the branch on the T-section has

smaller dimensions. If you want to reduce the

main duct, you will need to use an RCFU reduction.

Ø 100

Ø 125

Ø 100

Ø 125

Ø 125 RCFU

NPUSR SR

Ø 125Ø 125 RCFURCFU

TCPU

Example

Ø 100

Ø 125

Ø 100

Ø 125

Ø 125 RCFU

NPUSR SR

Ø 125Ø 125 RCFURCFU

TCPU

Example

Crossing ducts

If two ducts need to cross, we recommend

installing the duct that runs along the beam

underneath the duct crossing it. This is the best

way to reduce heat loss.

30˚

To get your duct down into the insulation as

quickly as possible, we recommend the solution

illustrated.

30˚

SLU

600

1200

Connection to unit viewed from the side

30˚

SLU

600

1200

Connection to unit viewed from above.

Connection between ducts and unit

It is important that all 4 ﬂanges are connected

to the ducts with a ﬂexible connection, so that

potential vibrations are not transferred from the

unit to the ducts system.

Avoid bending the ﬂex pipe as this will add to

an increased pressure loss in the system. When

mounting, the ﬂex pipe should be stretched as

far as possible – without deforming the pipe.

It is recommended to use an insulated ﬂex pipe

type THISOL.

Mount hose clamps around the outer layer of

plastic in order to ensure air tightness.

6.3 Connecting the

duct system

VIEWA402

Instructions Installing the duct system

It is important that you insulate the duct system

correctly in order to avoid heat loss. Where the

design allows, the ducts can be run in/under the

insulation without any problems and this will

save some of the costs of insulation.

NOTE:

• Itisimportantthatbothsupplyandextractare

covered by at least 100 mm of insulation

and that the insulation is ﬁxed tightly around

the duct.

• Thefreshairintakeandexhaustmustalways

have at least 30 mm of insulation to protect

against condensation. Where there is a pre-

heating surface or a geothermal surface, the

insulation of the fresh air intake should be at

least 100 mm.

• 50mmofinsulationwillbeadequateforsound

dampers, as they already have

50 mm of insulation.

In order to minimise heat loss from the duct sys-

tem in the ceiling, both the supply and discharge

ducts should be insulated using at least 100 mm

of insulation.

If you use insulation option A, we recommend

using two layers of 50 mm paper or foil covered

lamella mat mounted with staggered joints.

You should also note that if you use steel wire to

tie on the insulation, you must not tighten the

steel wire so much that it deforms or breaks up

the insulation.

Insulation of ducts, Option A

Insulation of ducts, Option B

Incorrect insulation of ducts

Note!

The above should be considered recom-

mended values only and you must always

abide by any country-speciﬁc regulations.

6.4 Insulating the

duct system

VIEWA402

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Danfoss air units and duct systems Installation guide

Danfoss air units and duct systems Installation guide

Danfoss air units and duct systems Installation guide

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