FläktGroup ILOX 129PLUS Installation and Maintenance Manual

Brand: FläktGroup

Model: ILOX 129PLUS

Category: Fireplaces

Type: Installation and Maintenance Manual

OPERATION, INSTALLATION AND MAINTENANCE MANUAL

GENERATION 2

AIR HANDLING UNIT

ILOX 129PLUS

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

Thank you for purchasing the ILOXair air handling unit. We have been

developing our products over the years with the aim of making them more

user-friendly. This user guide has also been written with this in mind. However,

if you feel that an aspect of the guide or the product needs to be improved, we

would be glad to hear from you. Our contact information can be found on web-

site

www.ﬂaktgroup.com

More useful information and help, such as the following, is available on our

website

www.ﬂaktgroup.com

• Instructions and guides

• Service call. Please have access to the unit’s product label (location on the

control box)

• Ordering original ﬁlters

SAFETY

We recommend that you follow these instructions strictly. This way

you will ensure reliable operation of your equipment for many years to

come.

WARNINGS AND NOTES

This manual contains clearly marked warnings which are intended for

your personal safety.

CONTENT

Safety ................................................................................................................................... 2

OPERATION & MAINTENANCE (FOR THE USER)

Main Components ..........................................................................................................3

Electrical data, Control equipment .......................................................................... 4

Basic operation ...............................................................................................................5

Plus Touch panel.............................................................................................................5

Temperature control ......................................................................................................6

Additional control equipment .....................................................................................7

Maintenance .....................................................................................................................8

Condensation, water inside the unit .......................................................................9

Overheating protection, temperature alarms, other alarms ....................... 10

Maintenance schedule, Fan speed settings ......................................................11

INSTALLATION (FOR INSTALLER AND SERVICE PERSONNEL)

Dimensions and weight ............................................................................................. 12

Duct connection, Insulation of the ducts ............................................................13

Installation options and duct deﬁnitions ............................................................. 13

Mounting example ........................................................................................................ 14

Site of installation ......................................................................................................... 14

Installing the condensate removal pipe .............................................................. 14

Installing the moisture barrier plate ..................................................................... 14

Connecting the post heater water coil ................................................................15

Mounting option, wall ..................................................................................................15

Mounting option, ceiling .............................................................................................16

Removing the unit from the ceiling ....................................................................... 17

Electrical installation ...................................................................................................18

External connection box ............................................................................................18

Internal connections .................................................................................................... 18

Connection diagrams .................................................................................................. 19

Cable entry ......................................................................................................................21

Physical connections for external control ..........................................................21

Control ...................................................................................................................... 21

Humidity Control ............................................................................................................21

Emergency stop ............................................................................................................21

Set-up menus - only for installer .......................................................................... 22

Declaration of conformity ......................................................................................... 26

Warning! Indicates the presence of a hazard which could

result in personal injury.

Note! Alerts the reader of important facts and conditions.

Warning! The device can be used by children from 8 years upwards and people (including children) with reduced

physical, sensory or mental capa bilities, or lack of experience and knowledge if they have received guidance or

information on how to use the device safely and understand the risks that can occur. Children should not play

with the appliance. Cleaning and maintenance is not carried out by children without supervision.

Warning! Installation, adjustment and commissioning that is described in this manual must be carried out by

competent, authorised personnel.

Warning! Use protective gloves during installation, service and maintanance.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

HEAT EXCHANGER

The unit has a counterﬂow heat exchanger made of aluminium and

it has a temperature efﬁciency of up to 80%. An automatic defrosting

function, Termo ice is standard.

Air ﬂow, l/s 40 50 60 70 80

Temperature efﬁciency,% 77.2 77.2 77.2 77.3 77.4

The table above shows the unit temperature efﬁciency in % at a given

air ﬂow according to EN 308 conditions.

POST HEATER, ELECTRICAL

The 2.4 kW electrical post heater is used to heat the supply air tem-

perature when the counter ﬂow heat exchanger is not able to recover

enough energy. It is also used when the defrosting function Termo ice

is active.

POST HEATER, HOT WATER COIL

Alternatively, a water coil can be used for post heating. The purpose of

the water coil is to raise the supply air temperature when the counter

ﬂow heat exchanger is not able to recover enough energy.

FILTERS

The unit is ﬁtted with a ISO Coarse pre-ﬁlter and ISO ePmi 55% ﬁlter in

the supply side and a ISO Coarse ﬁlter on the extract side. Fine ﬁlter is

made of paper materials.

PACKAGING

The unit is delivered in a cardboard box. Operation, installation and

maintenance instructions are included.

All of the printed material can be downloaded from our website

www.ﬂaktgroup.com

OPERATION & MAINTENANCE (FOR THE USER)

MAIN COMPONENTS

MAIN COMPONENTS, RIGHT HAND VERSION

CASING

The outer and inner casing are made of white coated galvanised steel

(RAL9016) with an intermediate layer of 20 mm polyester ﬁber insula-

tion. Corrosion class C3 and leakage class L3 (CEN class A).

FANS

The fans are driven by energy-efﬁcient EC motors. The speed of the

fans can be adjusted stepless independently of each other.

1. Counterﬂow heat exchanger

2. Extract air fan (behind the heat exchanger)

3. Supply air fan (behind the heat exchanger)

4. Post heater

5 Pre-heater/pre-cooler, water (accessory)

6. Control equipment

7. Preﬁlter, supply air (G3) ISO Coarse

8. Supply air ﬁlter (F7) ISO ePMI 55%

9. Extract air ﬁlter (G3) ISO Coarse

10. Power switch

11. Bypass damper

12. Reset button, thermal overload for electrical post heater

Condensate drainage, see chapter Dimensions and weight on page 12.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

ELECTRICAL DATA

Voltage: 230V, 1 phase 50 Hz.

Postheater Electrical heater Hot water coil

Fan Power (w) 2 x 169 2 x 169

Post heater (w) 2 x 1200 –

Total Power (W) 2740 360

Current (A) 12 1.6

ELECTRICAL DATA, CONTROL EQUIPMENT

TERMO ICE – AUTOMATIC DEFROSTING

The Termo ice function ensures an optimal annual efﬁciency and a bet-

ter indoor climate. The unit uses temperature sensors to detect when

defrosting of the heat exchanger is needed. Defrosting will not occur if

it is not needed. The Termo ice function operates differently depending

on if the unit is equipped with an electrical or water post heater.

TERMO ICE, POST HEATER, ELECTRICAL

When Termo ice is activated the by-pass damper opens and the

outdoor air is directed directly to the post heater and not via the heat

exchanger. The supply air fan is not stopped. The warm extract air de-

frosts the heat exchanger.

TERMO ICE, POST HEATER, WATER

When Termo ice is activated the supply air fan is stopped. The warm

extract air defrosts the heat exchanger.

When defrosting is not anymore needed the unit operates normally.

COOLING RECOVERY

During summertime, if the extract air is cooler than the outdoor air, the

by-pass damper will close. The heat exchanger then recovers cooling

from the extract air. This primarily applies if there is some form of cold

air device in the house. When the extract air is warmer then the out-

door air the by-pass damper will again be opened.

HUMIDITY

Optional humidity sensor for extract air. The unit can be controlled to

maintain the humidity below certain level via the Plus Touch panel.

CO2

Optional carbon dioxide sensor for extract air. The unit can be control-

led to maintain the carbon dioxide level below a certain level via the

Plus Touch panel.

MODBUS RTU

The unit has a Modbus RTU interface as standard. The unit can be con-

trolled and monitored via the Modbus ﬁeld bus interface.

ALARMS

The unit is equipped with alarms for ﬁlter change, sensor errors and

freeze protection when a water post heater is used.

SEC CLASS

SEC class A+ is fulﬁlled in a cold climate zone

(Nordic countries). Units conﬁgured for demand

control will achieve SEC class B in an average cli-

mate zone (Central Europe). ECO design directive 1254/2014.

CONTROL EQUIPMENT

The unit is equipped with an electronic control system, Plus control-

ler. The Plus controller handles fan speeds, the by-pass damper and

electrical post heater (accessory). The air handling unit is supplied

with a 1.25 meter cable and a plug in connector for the main supply.

Other connections are made in the connection box outside the unit.

The connection box has facilities for Modbus connections, cooker

hoods, Mosaik control and Plus Touch panel. Any additional sensor

connections are made directly at the control board.

FAN CONTROL

Four operating modes can be selected via the control panel (accesso-

ry):

AWAY is used when nobody is at home for a longer period e.g. vaca-

tion.

NORMAL is used for normal ventilation air ﬂow.

BOOST is used when there is a need for a higher ventilation air ﬂow.

MAXIMUM generates full fan speed.

The fan speeds can be adjusted independently of each other.

TEMPERATURE CONTROL

The Plus controller controls the by-pass damper and the electrical post

heater (accessory) to maintain the supply temperature set point. The

electrical post heater is activated when the energy recovery from the

heat exchanger is insufﬁcient.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

Fan speed:

1/4 for Away

2/4 for Home

3/4 for Boost

4/4 for Maximum

Active alarms Active function

Automatic operation

Away

Boost

The Plus Touch panel basic view.

Boost

Away

Automatic

Home

PLUS TOUCH PANEL

With the Plus Touch panel it is possible to change for example fan

speeds, temperature set point, date and time. For tips and more infor-

mation, press and hold the selected item on the screen.

TEMPERATURE SET POINT

It is possible to change the temperature set point and to read the tem-

perature of the different temperature sensors via the Plus Touch panel.

The temperature sensors are located inside the unit. This means that

they do not precisely reﬂect the actual outdoor or indoor air tempera-

tures.

WEEKLY SCHEDULES

The unit can be set to operate according to user-deﬁned weekly sche-

dules. A setup wizard guides you through the basic set-up. It is pos-

sible to edit the schedule for each day afterwards.

ALARMS

The Plus Touch panel shows alarms for example ﬁlter change and

sensor errors. For more information regarding alarms see separate

parts in this document.

FAN OPERATING MODES

All four operating modes can be selected via the Plus Touch panel:

Away is used when nobody is at home for a longer period e.g.

vacation.

Home is used for normal ventilation air ﬂow.

Boost, there are several variants:

• Boost is used when there is a need for a higher ventilation air flow.

• Boost 60 minutes sets the unit into BOOST mode for 60 minutes

• Fireplace timer 15 minutes is used when the user wants to light a fire

Maximum generates full fan speed.

Note! If a separate Away/Normal control switch is used, the switch

must be in the normal position to allow changes via the touch panel.

Home

BASIC OPERATION

The basic functions of the air handling unit can be controlled from the

following:

Plus Touch Panel Cooker hood Mosaik

MOSAIK CONTROL

Mosaik is standard light switch sized controller with three operating

modes. The right switch controls whether the unit is in away mode or

normal operation and the left switch controls home or boost operating

mode when right switch is in normal mode.

COOKER HOOD CONTROL

The air handling unit’s operating modes can be controlled with a coo-

ker hood. Compatible Iloxair cooker hoods can also indicate and reset

the unit’s alarms. For more detailed information please read the cooker

hood manual. Using Iloxair cooker hoods is strongly recommended for

ensuring the compability.

PLUS TOUCH PANEL

Home

Boost

Home

Away

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

Temperature range for water ﬂow temperature control.

* = 8°C (summer mode)

1 = 11°C

2 = 14°C

3 = 17°C

4 = 20°C

5 = 23°C

6 = 26°C

TEMPERATURE CONTROL, WATER HEATER

The supply air temperature set point is adjustable via the radiator ther-

mostat inside the unit. The below ﬁgure describes how to adjust the

set point:

Note! Position 3 or 4 on the radiator thermostat is recommended

during cold periods and * during warm periods.

TEMPERATURE CONTROL

During cold periods the by-pass damper closes and the cold outdoor

air is led through the counter ﬂow heat exchanger (winter mode). The

supply air will then be heated from the warm extract air. When the

outdoor air is cold and the recovered heat from the extract air is not

enough to achieve the supply air temperature set point then the post

heater (option) will start in order to maintain the supply air temperatu-

re. During warm periods when the heat recovery from the extract air is

not needed then the by-pass damper opens and the outdoor air is led

passed the heat exchanger directly into the supply air (summer mode).

Winter setting: the air ﬂows through

the heat recovery cell.

Summer setting: the air ﬂows past

the heat recovery cell.

TEMPERATURE CONTROL, ELECTRICAL HEATER

Temperature set point.

The supply air temperature set point is adjustable via the knob on the

front edge of the electrical box inside the unit. The temperature set

point can be adjusted between 12 and 26°C, recommended set points

being between 17°C and 20°C. It is also possible to set the tempe-

rature set point via the Plus touch panel (accessory). The electrical

post heater will not be activated unless the outdoor air temperature is

below the post heater activation temperature default being 8°C. Please

note that the temperature set point is not be mistaken to be the gene-

ral indoor temperature. The general indoor temperature is to be hand-

led by the heating system.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

ADDITIONAL CONTROL EQUIPMENT

HOME/AWAY SWITCH

The Home/Away switch allows you to reduce the ventilation rate. To

enable control from an Plus touch panel or

other additional control equipment connected

to the unit, the switch must be in the Home

position.

FIREPLACE OR BOOST SWITCH

The switch may be used either as a ﬁreplace switch or a regular

boost switch. When used as a ﬁreplace switch

it changes the pressure conditions in order to

make it easier to light a ﬁre. When in use, the

ﬁreplace switch overrides

any other switches.

CO2 TRANSMITTER

The CO2-switch measures the carbon dioxide level in the room and

boosts ventilation if the set point level is exceeded. When the CO2 level

drops below the set point the fans return to their previous speed.

HUMIDITY TRANSMITTER

The humidity switch boosts ventilation when the relative humidity in

the room exceeds the set point. During the cold season, the set point

should be set to approximately 50%. During the warm season, the set

point should be higher, approximately 70%. If the set point is correct

then the humidity switch boosts the ventilation when using the shower

or sauna. The normal ventilation rate is resumed after approximately

1–2 hours. During certain conditions the humidity level may be so high

that unit will stay in boost mode. In order to prevent this raise the hu-

midity set point.

4-SPEED SWITCH

The fan speeds can be set with the 4-speed switch. The switch overri-

des any other controls (with the exception of the

ﬁreplace switch). It is possible to boost ventila-

tion even if the switch is at a lower setting.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

MAINTENANCE

GENERAL

Filters, fans and the counter ﬂow heat exchanger are very important

for the function and economy of the unit. it is therefore important that

these are kept clean and in good condition. We recommend a general

check of these parts during ﬁlter replacement, every 6 months. For sa-

fety reasons, general caution should be observed during maintenance

of the unit. If necessary, use protective gloves.

Before cleaning the fans, heat exchanger etc, the unit should always have the power

disconnected.

FILTER ALARM AND REPLACEMENT OF FILTERS

The ﬁlters for the extract- and supply air shall normally be replaced

twice a year. In areas where there is a lot of air born particles such as

cities it may be necessary to change the ﬁlters more often. The con-

trols is set to remind the user to change the ﬁlter every 6:th months.

It is possible to change the interval when using Plus touch panel.

Follow the below instruction to change the ﬁlters:

1. Open the door.

2. Disconnect the power by using the power switch on the electrical

box.

3. Remove the used supply air ﬁlters (ISO Coarse pre-ﬁlter and ISO

ePM1 55% ﬁlter) from the console.

4. Remove the extract air ﬁlter.

5. Insert the new ﬁlters

6. Turn on the power switch and close the door.

7. Reset the ﬁlter alarm (on the Plus touch panel, accessory)

Warning! When replacing dirty ﬁlters, use of a face mask is

recommended (lowest class, FFP2).

Note! Only use ﬁlters recommended by FläktGroup at exchange. If

incorrectly selected ﬁlters are installed, there is a risk that perfor-

mance and air quality will not be achieved. FläktGroup disclaims

warranty liability if incorrect ﬁlters are installed upon replacement.

CLEANING THE FANS

Note that the fans are not be cleaned with water or other ﬂuids. The

fans are only to be cleaned with a vacuum cleaner or a cloth.

1. The heat exchanger is removed from the unit.

2. Remove the screws for the cover plates of the fans.

3. Disconnect the electrical contacts and remove the fans from the

unit.

4. Clean the fan and impeller.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

CLEANING OF THE HEAT EXCHANGER

Check that the surface of the heat exchange is not covered in dust.

Clean by either using a vacuum cleaner, compressed air or by shower

the heat exchanger in water. If this is not sufﬁcient, apply a grease-dis-

solving ﬂuid such as dish soap and then shower the heat exchanger.

Note! Acetone or a similar solvent must not be used. The heat ex-

changer is not to be soaked in water etc. Do not use sharp objects.

Make sure that the heat exchanger is completely dry before rein-

stalling.

The heat exchanger is pulled out of the unit. When reinstalling make sure that all the

gaskets are in the right position.

The heat exchanger is cleaned with either a vacuum cleaner or by showered with

water.

CONDENSATION, WATER INSIDE THE UNIT

When the unit is running, moisture from the extract air may condensa-

te in the heat exchanger. This applies mainly during autumn and winter.

The amount of moisture condensated from the extract air depends

on moisture production in the house such as cooking and showering.

Typically in newly built houses the construction materials emit their

excess moisture during the ﬁrst years. In the bottom of the unit there

is a drainage for removal of the condensate. It is important to regularly

check the function of drainage to prevent clogging. After the summer

the water in the water trap may have evaporated. This can result in a

gurgling noise. This can be ﬁxed by pouring water into the condensate

drain hole located below the heat recovery unit to ﬁll up the water trap.

Water can also be added without removing the unit by pouring water

onto the bottom of the machine, to its extract air side. The extract air

side of the machine is on the same side as the supply air ﬁlter and the

by-pass damper.

The chromed ball-ﬁtted water trap allows for a silent and reliable the disposal of

condensate.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

OVERHEATING PROTECTION, TEMPERATURE

ALARMS, OTHER ALARMS

POST HEATER ELECTRICAL

The unit has an overheating protection device that switches off the

electrical post heater if the temperature is too high. If the overheating

device has triggered then the user needs to manually reset this. See

ﬁgure below:

Overheating protection

reset button

When the overheating protection has been triggered remove the plastic cover and

press the reset button on the front edge of the electrical box inside the unit.

Note! If the overheating protection device has been triggered it is

important to ﬁnd the overall cause of the problem.

POST HEATER, WATER

The unit has a freeze protection sensor that prevents the water heater

to break. If the water temperature drops below the limit value then the

unit is stopped.

TEMPERATURE ALARM

The unit automatically identiﬁes temperature sensor errors. In the

event of an error, arrange a service visit.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

MAINTENANCE SCHEDULE, FAN SPEED SETTINGS

MAINTENANCE SCHEDULE

Date of purchase of the unit: ............./.........../20.........

Fill in the record starting from the season of the year following the

purchase.

Period Replace the ﬁlters,

clean the unit

Vacuum the

exhaust air ﬁlter Check unit operation Clean the cell Check/clean the

fans

Year 1, spring x x

Year 1, autumn x x

Year 1, winter x

Year 2, spring x x x

Year 2, autumn x x

Year 2, winter x

Year 3, spring x x (x)

Year 3, autumn x x

Year 3, winter x

Year 4, spring x x x

Year 4, autumn x x

Year 4, winter x

Year 5, spring x x (x) x

Year 5, autumn x x

Year 5, winter x

Year 6, spring x x x

Year 6, autumn x x

Year 6, winter x

FAN SPEED SETTINGS

To ﬁnd out about the fan speed settings, check the set-up record or

contact the person who performed the set-up. We recommend that

you write down the settings here for future reference.

Speed 1 V

Speed 2 V

Speed 3 V

Speed 4 V

Supply difference adjustment V

Replacing the ﬁlters and cleaning the unit: Replace the ﬁlters according

to the instructions, vacuum the unit inside and wipe with a damp cloth,

if necessary. Clean the water trap at the same time.

Note! Depending on the situation it may be necessary to change

the ﬁlters more often than indicated in this manual. In that case, the

other maintenance actions should also be performed at more frequ-

ent intervals.

Checking the operation of the unit: Listen to the fan sounds (do they

both work, is the sound balanced, are there noises that may indicate

bearing faults?). Inspect the condition of the unit visually.

Cleaning the cell: Clean the cell according to the instructions. Perform

the inspection every spring and clean every 1–2 years.

Checking/cleaning the fans: Should be performed by a professional to

ensure that the fans’ balance pads do not become dislodged.

Note! The ventilation ducts should be cleaned by a professional eve-

ry 5–7 years.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

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INSTALLATION (FOR INSTALLER AND SERVICE PERSONNEL)

DIMENSIONS AND WEIGHT

DUCT CONNECTIONS

166 166133 133

K K

293

134

165

598

165

293

134

166 166133 133

930

573

1 1

2 4

1 = outdoor air (Ø200)

2 = supply air (Ø200)

3 = exhaust air (Ø200)

4 = discharge air (Ø200)

K = condensate outlet (½” female thread) at the bottom

Weight: 70 kg

MODEL L (LEFT) MODEL R (RIGHT)

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

DUCT CONNECTION, INSULATION OF THE DUCTS

Note! During installation, the instructions relating to the unit and

duct insulation must be adhered to without deviation. Otherwise

there is a risk of condensation and moisture resulting in a major

damage.

DUCT CONNECTION

Exhaust air from the unit should only be connected to a ventilation duct

intended for the purpose. Connection should not be made to a chimney

or a smoke or gas duct. If the unit is being used in premises with for

example an open ﬁreplace or heating stove with a chimney or smoke

or gas duct, an adequate supply air ﬂow must be provided. A kitchen

duct must be provided in accordance with applicable regulations. A

separate extract air valve in the kitchen is necessary when using a

cooker hood in combination with a unit that has a ﬁfth connection.

INSULATION OF DUCTS

In order to the unit working as intended the duct system should be

installed in a professional manner in accordance with local regula-

tions and following the ventilation plans made by a professional. This

includes installation of the ducts through external walls containing

insulation and vapour barriers, external roofs and joists. If this is not

done in professional manner there is a risk for condensation, resulting

in possible damage to the unit, duct system or the structure itself due

to moisture. In the case of replacing older units, it is also necessary

to ensure the quality of the ducts and duct insulation. Supply air ducts

and extract air ducts are ﬁlled with warm air. If those ducts are placed

in unheated spaces they must be insulated. The insulation should be

applied externally and have a wind-proof surface layer. Outdoor air

ducts and exhaust air ducts are ﬁlled with cold air. If those ducts are

placed inside the building’s vapour barrier they must be insulated and

have a diffusion-proof (moisture-proof) surface layer. Given the high

degree of heat recovery achieved by unit the exhaust air also gets very

cold and must be thermally insulated.It is also important that the wall/

ceiling which the unit will be mounted on is well insulated.

SILOX

EXT

EXH

DUCT DEFINITIONS

O = Outdoor air

S = Supply air

EXH = Exhaust air

EXT = Extract air

EV = Extract air valve

INSTALLATION OPTIONS AND DUCT DEFINITIONS

If the unit is not installed immediately after delivery it should be stored

in a protected place under cover and in its original packaging. It is

recommended using some machinery while moving and lifting the unit.

Use protective gloves during the installation.

INSTALLATION OPTIONS

The unit shall be placed according to the ventilation plans made by

a professional. If there is no speciﬁc ventilation plans then the unit

should be installed according to one of the following options. The unit

is intended for indoors installation in a warm space and can be wall

mounted or ceiling mounted.

Warning! In order to prevent personal injury: The unit

must be connected to the ducts before the power plug is

connected.

Warning! The unit must always be connected to a protective

earth socket.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

MOUNTING EXAMPLE

Caution! To avoid the risk of moisture damage to the roof

and roof insulation, the outdoor air duct should not be instal-

led horizontally inside the roof insulation. Outdoor air duct

should be insulated with 100 mm mineral wool mat with a

moisture-proof surface layer in cold spaces.

The exhaust air duct from the unit should

preferably run straight to the roof, without any

horizontal runs inside the roof insulation.

The outdoor and exhaust

air duct must be insulated

with 100 mm mineral wool

mat with a moisture-proof

surface layer in cold spaces.

If cooker hood is connected

to the unit, EI30 insulation

should be used.

The condensate pipe must run into a ﬂoor drain, not directly into

the sewer. The water seal height of the water trap must be at

least 100 mm. There must be no more than one water trap and

no horizontal runs in the condensate pipe.

NB! If the unit is equipped with

a cooling coil, the supply air

duct must be insulated, e.g.

with Armaﬂex, or with insulation

covered with an airtight vapour

barrier.

The outdoor and exhaust air ducts must be

insulated with 100 mm mineral wool mat with a

moisture-proof surface layer in warm spaces.

The extract and supply

air ducts do not need any

insulation in warm spaces.

The extract and supply air

ducts must be insulated with

100 mm mineral wool mat

and preferably inside the

loose wool in cold spaces.

Installation example.

SITE OF INSTALLATION

The air handling unit should be installed in a heated space. Ambient

temperature should be above +10 °C. The ILOX 129Plus can be either

wall mounted with the mounting brackets or ceiling mounted with a

ceiling bracket.

INSTALLING THE CONDENSATE REMOVAL PIPE

At the bottom of the unit, there is an outlet (1/2“ internal thread) for

condensate removal. Fit a pipe or a rigid hose with an inner diameter

of at least 12 mm between the condensate outlet and a ﬂoor drain or

the waste connector of a wash basin. The condensate removal pipe

should not run directly into the sewer. A water trap has to be instal-

led in the condensate removal pipe. Make sure that the condensate

removal pipe is always leaning towards the ﬂoor drain or wash basin.

The condensate removal pipe should always be installed in warm con-

ditions. If the condensate removal pipe can not be installed in warm

conditions, a heating cable should be installed in order to prevent fre-

ezing. Make sure to ﬁll up the water trap.

INSTALLING THE MOISTURE BARRIER PLATE

Routing of the ducts through the moisture barrier must be done ca-

refully. The ducts are close to each other on the top of the unit. It

is therefore difﬁcult to seal the moisture barrier without a separate

moisture barrier plate. If the unit is placed in a washroom or utility

room, air leakage above the unit is particularly harmful due to the high

moisture content of the space. A hole smaller than 10–20 mm in di-

ameter should be cut into the sheet foam of the plate where the pipe

outlets exit the roof. The plate should be secured to the ceiling through

the side holes. The moisture barrier membrane should be tensioned

between the plate and the structure, or taped tightly to the plate.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

MOUNTING OPTION, WALL

1. The wall mounting brackets (accessory) should be attached secure-

ly into a wall, preferably onto a brick, light weight concrete or con-

crete wall. If the mounting surface is a drywall or similar material,

the wall must be strengthened with a frame or a plywood board.

2. Check both vertical and horizontal alignment with a spirit level.

3. Remove the two bottom rear mounting screws.

4. Lift the bottom edge of the unit onto the lower parts of the mounting

brackets.

5. Move the unit slightly upwards, keeping it against the wall, until the

mounting projections in the upper part of the bracket are guided into

the openings of the unit.

6. Lower the unit onto the bracket

7. Fasten the bottom corners onto the brackets using the screws re-

moved earlier.

939

595

790 60

523

Wallmounting with wall rails.

Note! Installing the unit on a bedroom boundary wall should be av-

oided due to the transmission of sound; otherwise, the transmission

of sound must be prevented using e.g. a ceiling bracket.

CONNECTING THE POST HEATER WATER COIL

Connect the water coil to the heating system of the house, for example

in parallel with the heating radiators. However, the water temperature

of an underﬂoor heating circuit is often too low, so connecting the coil

to a ﬂoor circuit is not recommended. Also, the coil must not be con-

nected directly to hot water from a boiler without a mixing valve.

The coil is connected to plastic pipes with a diameter of 15mm. The

pipes extend about 500 mm from the top of the unit. The supply water

should be connected to the pipe which is connected to the thermostat

valve. Heat conduit pipes should be connected above the unit with

compression connectors and support sleeves. Create an inspection

hatch If the connections are made above a false ceiling. The return

pipe must be ﬁtted with a vent valve at the highest point. Before com-

missioning, once the system has been ﬁlled up and all air is removed,

make sure that water circulates in the coil. The system may need to

be vented once more after a few days. Also, make sure that the fans

are commissioned before the water is connected. The water ﬂow in

the coil needs to be constant during winter time due to the danger of

freezing.

Warning! Never connect the water coil to the domestic

water supply system.

Warning! The circulation pump should not be switched off

during the heating period. Also, the shut-off valves for the

coil should never be closed.

Return pipe Ø15 mm, plastic

Supply pipe Ø15 mm, plastic

Thermostatic valve

Shut-off valve

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

Example of an installation.

8 mm threaded rod

8 mm ﬂange nut

Rubber damper

Washer

8 mm nut

Threaded rod attachment.

Exhaust air

Extract air

Outdoor air

N. B. The picture

is not to scale.

Outdoor air

Threaded rods

Supply air

MOUNTING OPTION, CEILING

1. Secure the ceiling bracket to the ceiling structure using four 8 mm

threaded rods.

2. The bracket should be installed with the mounting hooks pointing

downwards and the ducts as the ﬁgure shows. The ﬁgure shows

outlets for a right-handed unit (Model R).

3. Flange nuts should be ﬁtted above the frame, and a conical rubber,

washer and locking nut should be ﬁtted underneath the frame.

4. Pre-tighten the locking nut manually approximately two turns (the

rubber should shorten about 2 mm).

5. Cut off the threaded rods, leaving the ends of the rods above the

lower edge of the frame.

Note! The bottom of the frame should be installed no more than

10–20 mm above the ﬁnished ceiling surface, so that the unit door

can still open.

Warning! When using a ceiling mounting frame, it is especi-

ally important to make sure that the unit is properly secured

to the ceiling mounting frame. When the unit engages the

frame, you should hear a clear “click” on both sides of the

ceiling mounting frame.

Dimensions of the ceiling-mounting frame (model R ducting). The same ceiling-

mounting frame can also be used for a model L unit.

The ﬁgure below shows the duct outlets for Model (R).

1. Outdoor air for the unit

2. Supply air from the unit to the house

3. Extract air for the unit

4. Exhaust air out

5. Optional cooker hood duct

Threaded rod locations

Note! The same ceiling bracket are used for both the left- and right-

hand version.

Exhaust air

Note! The ceiling-mounting frame must be min. 10 mm away from

the ﬁnished wall surface!

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

REMOVING THE UNIT FROM THE CEILING

4. The ceiling mount rails slide in the ceiling mount frame, as in the

image, and release the ventilation unit.

3. Release the mounting from the ceiling mount frame by pushing

back the ceiling mount rail that is visible through the holes in the

front of the frame. This should be done on both sides of the frame.

1. Remove the front panel from the front of the frame by taking out the

2 screws. Then push the front panel upwards to re move it.

2. Support the ventilation unit from underneath so that it does not fall

when the rails are released.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

Connections to the external junction box

The control board inside the unit is used to make the physical connec-

tions required for external control and to connect any of the following:

carbon dioxide transmitter, carbon dioxide switch, humidity transmitter,

humidity switch, emergency stop switch, Home/Away switch and ﬁre-

place boost switch.

Note! Extra length must be allowed for the cables, so that the inside

of the electrical box can be pulled out sufﬁciently for installation.

Plus Touch panel

Cable with plug 129Plus

Mosaik switch

Modbus in

Modbus out

Hood control from Basic, Seili, Design,

Basic-E, Slide-E, Rosala, Satava

ELECTRICAL INSTALLATION

The air handling unit is equipped with a plug connector, which can

be plugged directly into a wall socket that has an earth connector.

Electrical installation and connections for the unit must be made by

a qualiﬁed electrician. The unit is equipped with a service switch for

switching off the power. When installing accessories or other electrical

connections, power should be switched off by disconnecting the plug

from the socket. The unit is equipped with an external connection box

for connecting some of the basic accessories of the unit.

EXTERNAL CONNECTION BOX

An external connection box is used to make the most common control

connections related to the unit. The external connection box is moun-

ted above the unit or in the ceiling, next to the service hatch.

INTERNAL CONNECTIONS

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

CONNECTION DIAGRAMS

CONNECTION

YEGN

Extract air fan

BU X3,N

BU X5,N

Plug

230V

Fuse 16A

BN X3,1

YE X5,1

Electrical box frame

Unit frame

YEGN

Supply air fan

BU X3,N

BU X5,N

Transformer 24V

BN X3,1

YE X5,1

Triac resistor control

Forced control loop

0–10V

24VDC

Bypass act.

Bypass actuator GND

0–10V, supply

Bypass

Model R

Bypass

Model L

Programming

connector

On-off switch

In the case of electric

reheating

Overheating protection

Temperature sensors

T1 = fresh air

T2 = supply air

T3 = extract air

T5 = supply air after reheating

T6 = hot-water coil (W model)

T7 = indoor air (not in use as standard)

LED no

yegn

0–

10V, exhaust

Those m arked with a dotted

line only apply to units w ith

electric reheating.

Air Handling Unit ILOX 129Plus - Operation, installation and maintenance manual

FläktGroup FG_DC_10745GB_20230109_R0 Specifications are subject to alteration without notice

CONTROL FUNCTIONS

Start-up panel connector on

the side of the electrical box

Fireplace boost switch

0–10V

COOKER HOOD CONTROL

Mechanical hoods with

manual Electronic hoods with Electronic hoods with

boost damper electric boost damper electric boost damper

Ilox Basic Ilox Basic-E Ilox Rosala

Ilox Seili Ilox Slide-E Ilox Satava

Ilox Design

Ilox Design center

Hood

NOMAK

2x2x0.5

+0.5

NOMAK

2x2x0.5

+0.5

NOMAK

2x2x0.5

+0.5

Carbon dioxide or Carbon dioxide

switch transmitter

NOMAK

2x2x0.5

+0.5

NOMAK

2x2x0.5

+0.5

Transformer 24V

0–10V

NOMAK

2x2x0.5

+0.5

0–1

NOMAK

2x2x0.5

+0.5

Humidity

Pump control 230V 100W

Bypass actuator 230V 10W

Status 2–4

Status common

Status 1

Forced control loop

Plug

230VAC 10A

Plug

230VAC 10A

Home

Boost

Maximum

Ctrl voltage 24VDC

Ctrl panel GND

Ctrl panel B

Ctrl panel A

Ctrl panel 24VDC

EXTERNAL JUNCTION BOX

To be installed above the unit or at the inspection hatch on the

ceiling

Junction box cable (included)

Home/Away switch

0–10V CO2

Away

Home

JAMAK

2x(2+1)x0.5+0.5

NOMAK

2x2x0.5

+0.5

NOMAK

2x2x0.5

+0.5

NOMAK

2x2x0.5

+0.5

NOMAK

2x2x0.5

+0.5

Programming

connector

Emergency stop

switch

Home/Away

Emergency stop

Common

Alarm A

Alarm B

Potential-free

contact!

NOMAK

8x2x0.5

+0.5

Connection to the next

Iloxair air handling unit

NOMAK

2x2x0.5

+0.5

The emergency stop circuit is opto-isolated

(requires an external voltage of 24 VDC).

The control voltage can be taken from pins no 34 and 37.

LED no

Control 24V

Control: speed 2 (Home)

Control: speed 3 (Boost)

Control: speed 4 (Maximum) (when required)

Status info: speeds 2–4

Status info: common

Status info: speed 1 EXTERNAL

Alarm common CONTROL

Alarm A Physical connections

Alarm B

Mosaik Sälzer M220

speed selection speed selection

switch switch

Rear view

SWITCH

CONTROL

Touch panel

PANEL

CONTROL

Humidity or Humidity

switch transmitter

1wh

2wh

1wh

2wh

1wh

2wh

1wh

2wh

1wh

2wh

1rd

1bu

in out

MODBUS

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FläktGroup ILOX 129PLUS Installation and Maintenance Manual

Brand: FläktGroup

Model: ILOX 129PLUS

Category: Fireplaces

Type: Installation and Maintenance Manual

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FläktGroup ILOX 129PLUS Installation and Maintenance Manual

FläktGroup ILOX 129PLUS Installation and Maintenance Manual

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