FläktGroup RDAF Installation guide

Brand: FläktGroup

Model: RDAF

Category: Split-system air conditioners

Type: Installation guide

This manual is also suitable for

INSTALLATION, OPERATION, MAINTENANCE AND SPARE PARTS

HEAT RECOVERY UNIT

VILLAMASTER RDAF

Heat recovery unit RDAF - Technical manual

FläktGroup DC_9349GB_

20210329_R5 We reserve the right to make changes without prior notice

CONTENTS

NOTE! INSTALLATION, ADJUSTMENT AND COMMISSIONING AS DESCRIBED

IN THESE INSTRUCTIONS MUST BE CARRIED OUT BY AN INSTALLER OR SERVICE PERSONNEL.

WARNING! THE APPLIANCE MAY BE USED BY CHILDREN OVER THE AGE OF 8, PERSONS (INCLUDING CHILDREN) WITH PHYSICAL,

SENSORY OR MENTAL DISABILITIES OR LACK OF KNOWLEDGE OR EXPERIENCE, PROVIDED THEY HAVE RECEIVED INSTRUCTION

OR INFORMATION ON SAFE USE OF THE APPLIANCE AND UNDERSTAND THE POTENTIAL RISKS. CHILDREN MAY NOT PLAY WITH

THE APPLIANCE. CHILDREN MAY NOT CLEAN OR PERFORM MAINTENANCE ON THE APPLIANCE WITHOUT SUPERVISION.

OPERATION AND MAINTENANCE (FOR USER)

Functions, electrical data, energy class ................................................................................ 3

ISYteq Touch 3.5 control panel

General information ................................................................................................................ 4

Cleaning of the display ......................................................................................................... 4

General buttons and symbols ............................................................................................ 4

Home screen ............................................................................................................................5

Operation ....................................................................................................................................6

Maintenance and cleaning of heat exchanger and fans ................................................8

Filter alarm, ﬁlter replacement ..................................................................................................9

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

INSTALLATION (FOR INSTALLER AND SERVICE PERSONNEL)

Dimensions and weight ............................................................................................................... 11

Wiring and connection diagram, external functions ...................................................... 12

Duct connection, duct insulation .............................................................................................13

Installation options and duct deﬁnitions .............................................................................. 14

Installation, duct connection ..................................................................................................... 15

Installation, connection ISYteq Touch 3.5 control panel ...............................................16

ADJUSTMENT, COMMISSIONING (FOR INSTALLER AND SERVICE PERSONNEL)

Settings, date/time, language ...................................................................................................17

Settings, login ..................................................................................................................................18

Adjustment ....................................................................................................................................... 19

Control panel operation, commissioning ............................................................................ 20

Parameter list ................................................................................................................................. 23

MISCELLANEOUS

Spare parts ..................................................................................................................................... 28

EC Declaration of Conformity ................................................................................................... 30

Disposal of products and packaging materials ................................................................31

Heat recovery unit RDAF - Technical manual

FläktGroup DC_9349GB_

20210329_R5 We reserve the right to make changes without prior notice

ENERGY CLASS

Compliant with energy class A+ in cold climate conditions (Scandinavia).

If conﬁgured for on-demand control, the unit is compliant with energy

class A in average climate conditions (Central Europe). Ecodesign

Directive 1253/2014.

OPERATION AND MAINTENANCE (FOR USER) - FUNCTIONS, ELECTRICAL DATA, ENERGY CLASS

FANS

The fans are powered by energy-efﬁcient EC motors. They are easy to

remove for service and maintenance. The speed of the fans can be ad-

justed independently of each other.

HEAT RECOVERY AND SUPPLEMENTARY HEATING

In climates where the temperature seldom drops below -10 °C, there is

usually no need for supplementary heating. This is because the rotary

heat exchanger recovers enough thermal energy from the extract air

(≤ 85% htemp).

When the outdoor temperature is below –10 °C and the desired supply

air temperature cannot be achieved, a postheater is required, which is

controlled to maintain the set supply air temperature.

In very cold areas, the unit can also be supplemented with a heat-

er that preheats the outdoor air. This heater starts preheating the air

when the outdoor temperature falls below –12 °C.

The electric heaters have an integrated overheating protection function.

NOTE! THE ELECTRIC POSTHEATER IS

ONLY ACTIVATED IF THE ROTOR IS IN OPERATION.

FILTER

The unit is ﬁtted with class (F7) ePM1 50% ﬁlters for the supply air and

class (M5) ISO Coarse 85% ﬁlters for the extract air. For ﬁlter replace-

ment, see page 7.

ISYTEQ MINI CONTROL UNIT

A ISYteq Mini control unit is integrated into the unit and controls the

operation of the fans, the rotary heat exchanger and any electric heat-

ers. The unit is controlled via an external ISYteq Touch 3.5 control pan-

el (accessory), which should be installed in a suitable place.

DEFROSTING

During cold periods, when frost may form in the rotor, the integrated

control unit automatically activates a defrosting function. The unit de-

frosts for 15 minutes every 6 hours if the outdoor temperature is below

-10 °C. The supply air fan stops and the rotor moves forward in sections.

COOLING RECOVERY

In the summer, if the extract air is cooler than the outdoor air, the rota-

ry heat exchanger starts to recover cooling from the cooler extract air.

This primarily applies if there is some type of cooling appliance in the

house.

ALARMS

The ISYteq Basic control panel (accessory) has a limited alarm indica-

tor function. The panel indicates, for instance, when there is a temper-

ature alarm or when the ﬁlter needs replacing.

If the ISYteq Touch 3.5 control panel (accessory) is used, the alarm will

be presented in plain text (see separate instructions).

MOISTURE CONTROL (OPTIONAL)

This function automatically limits the rotary heat exchanger’s moisture

recovery at high indoor humidity levels. This function can also be or-

dered retrospectively to supplement the unit.

CO2 CONTROL (OPTIONAL)

This function regulates towards a preset setpoint. The fan speed is au-

tomatically adjusted to achieve the desired CO

level.

NOTE! CO

control requires a ISYteq Touch 3.5 control panel. This

function can also be ordered retrospectively to supplement the unit.

ETHERNET CONNECTION (OPTIONAL)

This function can be used to connect the unit to an existing network. The

RDAF has an integrated web server, which makes it possible to read

and change certain parameters via a web browser. The connection can

also be used for connection to a superior system via Modbus TCP/IP..

To optimize the performance of communication, please follow the

recommendations below.

- Minimize the number of general broadcasts.

- Only send dedicated trafﬁc to the controller.

- Do not attempt to access the web server when using Modbus TCP-IP.

- Maximum of one Modbus message per second is recommended.

Avoid data bursts.

- Only write to Modbus registers when values have been changed.

THE UNIT’S MAIN COMPONENTS

ELECTRICAL DATA

Voltage: 230 V, single phase 50 Hz

Size Fan motors 1)

Output, W

Preheater

Output, W

Postheater

Output, W

Rated output

Mini 166 1000 1000 2186

Midi 192 1000 1000 2212

Maxi 340 21002) 1000 3460

1) Refers to two fan motors

2) Duct air heater. Cannot be retroﬁtted on RDAF Maxi, generation 1

1. Outdoor air sensor

2. Supply air ﬁlter

3. Preheater (RDAF Maxi

has duct air heater)

4. Heat exchanger

5. Heat exchanger motor

6. Postheater

7. Supply air fan

8. Supply air sensor

9. Extract air sensor

10. Casing

11. Extract air ﬁlter

12. Control unit

13. Extract air fan

Heat recovery unit RDAF - Technical manual

FläktGroup DC_9349GB_

20210329_R5 We reserve the right to make changes without prior notice

ISYTEQ TOUCH 3.5 CONTROL PANEL

GENERAL

The control panel has a touch screen display. Use your ﬁnger or the

back of a pen to navigate in the menus.

When the power is switched on, all the menus will be imported into

the system. This will take about 20-30 seconds. After this, the home

screen will be displayed.

CLEANING OF THE DISPLAY

Disconnect the unit from the power supply by disconnecting the power

cord. Carefully wipe the display with a soft, dry, non-abrasive cloth.

If any marks remain, moisten the cloth slightly with a detergent spe-

cially designed for LCD or mobile screens and wipe the screen gently

from top to bottom.

Never use other detergents, as they may contain ammonia or other

additives that could damage the display.

IMPORTANT:

• Never spray or pour liquids directly onto the display.

• Never clean the control panel when the system is switched on.

GENERAL BUTTONS AND SYMBOLS

The following buttons and symbols are universal and available on

many menu pages.

Home button, to return to the home screen.

Back button, to cancel and return to the previous page.

Conﬁrm button, to conﬁrm and proceed.

Changing a value.

Option 1: Press the arrow keys to increase or decrease

the value.

Option 2: Press the displayed number to enter the cho-

sen value (see below).

Use the number keys to enter a value.

Conﬁrm with or cancel with .

Read-only values (without a surrounding

window), cannot be changed.

Editable values (surrounded by a win-

dow), can be changed.

Some submenus have more than one

page. Click the upper or lower part

of the scroll list to navigate between

pages.

NOTE! The cursor cannot be moved

vertically.

Heat recovery unit RDAF - Technical manual

FläktGroup DC_9349GB_

20210329_R5 We reserve the right to make changes without prior notice

ISYTEQ TOUCH 3.5 CONTROL PANEL - HOME SCREEN

ALARMS

No alarm

Alarm B

Alarm A

Heat recovery active

Postheater active

Preheater active

Defrosting in progress

Manual mode

Heating stove mode

CO2 control

Forced via cooker hood

Away mode

Home mode

Forced mode

STATUS LINE

OPERATING STATUS

OPERATING MODES

CLOCK

CURRENT SETPOINT,

SUPPLY AIR TEMPERATURE

The user can select between the following operating modes:

“AWAY” used when there is reduced need for ventilation, e.g.

when occupants are on holiday

“HOME” used for normal ventilation ﬂow

“FORCED” used when there is a greater need for ventilation

(automatically reverts to normal after 120 minutes)

Heat recovery unit RDAF - Technical manual

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20210329_R5 We reserve the right to make changes without prior notice

ALARMS

See page 7.

SHORTCUT TO SETTING OF TEMPERATURE SETPOINT

See page7 for more information on temperatures.

See page7.

SHORTCUT TO SETTING OF

DATE AND TIME

SELECT OPERATING STATUS

See page 7.

AWAY MODE HOME MODE FORCED MODE

Press the relevant ﬁeld to select operating mode.

The operating mode cannot be changed during defrosting,

or during forced operation with a cooker hood.

ISYTEQ TOUCH 3.5 CONTROL PANEL - OPERATION

Heat recovery unit RDAF - Technical manual

FläktGroup DC_9349GB_

20210329_R5 We reserve the right to make changes without prior notice

SELECTING OPERATING STATUS

The symbol on the home screen shows the operating status. Press the

centre of the fan symbol to change the status.

Normal mode (manual)

Heating stove mode, makes it easier to light a heating stove

or open ﬁreplace. Temporarily creates overpressure in the

house.

ALARMS

The symbol on the home screen shows the alarm status.

No alarm

Alarm B

Alarm A

Press the icon to enter the alarm screen.

TEMPERATURES

Here you set the desired supply air temperature (setpoint).

Note: This value is not to be confused with the desired in-

door temperature, which is managed by the domestic heat-

ing system. The recommended setpoint is 16–19 °C. The

factory setting is 18 °C. Temperatures, output signals etc.

are read-only values.

FAN STATUS

Supply and extract air fan speeds can be read from

30 –100 % or as 0 (off).

AIR QUALITY

Air quality (only available if optional moisture control or CO

control is activated). Relative humidity of the supply and ex-

tract air can be read from 0-100% RH.

The setpoint and current CO

value (up to 2,000 ppm) can

be read.

SYSTEM OVERVIEW

Version control panel -- -- -- -- -- -- -- -- -- -- -- --IP Octet 1

Bootloader control panel --------------------IP Octet 2

Version control card ------------------------ IP Octet 3

Bootloader control card -- -- -- -- -- -- -- -- -- -- --IP Octet 4

Unit type

TIME SCHEDULES

(Not applicable to domestic ventilation).

SETTINGS

See pages 17–18..

CLEARING ALARMS

To clear an individual alarm, press Acknowledge after the relevant

alarm. To clear all the alarms, press Acknowledge All button (top right).

If the alarm cannot be cleared, it will reappear on the display and the

underlying cause for this must be resolved before the alarm can be

cleared.

A built-in timer is normally set to provide a ﬁlter replacement reminder

(alarm) every six months. If a shorter replacement interval is required

(before the alarm is due) the ﬁlter alarm can be reset under the Set-

tings menu. See page 22, ﬁg. 3.

Example 1 No alarm Example 2. Active alarms

ALARM HISTORY

ISYTEQ TOUCH 3.5 CONTROL PANEL - OPERATION

Heat recovery unit RDAF - Technical manual

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20210329_R5 We reserve the right to make changes without prior notice

MAINTENANCE AND CLEANING OF HEAT EXCHANGER AND FANS

GENERAL

The fans, ﬁlters and heat exchanger are very important for the opera-

tion and economy of the unit. For this reason, it is crucial for them to

be kept clean and in good condition.

We recommend a general check-up every 6 months. For safety rea-

sons, general caution should be observed during maintenance of the

unit. Be careful to avoid trapping any cables. If necessary, use protec-

tive gloves.

CLEANING OF THE HEAT EXCHANGER

Check that the surface of the rotor is not coated with dust. Clean with

a vacuum cleaner or by blowing through with compressed air. If vac-

uum cleaning is not sufﬁcient, hand-spray with grease dissolving ﬂuid

and then blow clean with compressed air. Use the compressed air to

blow away from the clean side towards the dusty side. NOTE! Water,

acetone or similar solvents must not be used. We recommend that the

rotor be lifted out by two people.

Figure 4. Before cleaning the heat exchanger, fans etc., the unit should always have

the power disconnected. Pull out the plug. CLEANING OF FANS

Note that the fans must not be cleaned with water or other ﬂuids; they

may only be vacuum cleaned or brushed.

Figure 5. Open the unit by unscrewing the screws on the unit door (socket 13 mm).

Figure 6. Remove the heat exchanger from the unit. Disconnect the electrical con-

nection to the rotor motor. During reassembly, check that the seals are

positioned correctly.

Figure 7. Vacuum clean the heat exchanger from both sides or blow clean with

compressed air.

Figure 8. Remove the fans from the unit. Disconnect the electrical connection.

Figure 9. Clean the rotor with a brush or vacuum cleaner.

The drive belt and seals may need replacing due to wear and tear.

Check them for damage and replace if necessary. For designations,

see spare parts list of pages 28–29.

Heat recovery unit RDAF - Technical manual

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20210329_R5 We reserve the right to make changes without prior notice

FILTER ALARM AND FILTER REPLACEMENT

Figure 14. Location of ﬁlters in unit.

Figure 15. Resetting of ﬁlter alarm timer.

Extract air

ﬁlter

Supply air

ﬁlter

Figure 12. Pull out the plug.

Figure 13. Opening of unit door.

Figure 10. The information symbol indicates alarm B.

Figure 11. Showing and resetting of ﬁlter alarm.

3. Pull out the supply air and exhaust air ﬁlters (see ﬁgure 14). Dispose

of used ﬁlters according to local waste regulations.

2. Open the unit by unscrewing the screws on the unit door.

4. Insert new ﬁlters.

5. Reinstall the ﬁlter hatch.

6. Connect the plug.

7. After replacing the ﬁlter, the ﬁlter alarm should be reset by pressing

“Acknowledge” (see ﬁgure 11).

If a ﬁlter is replaced before the alarm is due, the ﬁlter alarm timer

must be reset. To do this, press “Reset ﬁlter alarm” in the “Settings”

menu.

FILTER ALARM AND FILTER REPLACEMENT

The supply air and exhaust air ﬁlters should normally be replaced

every six months. In dirty areas, the ﬁlters may need to be replaced

more frequently.

A built-in timer is normally set to provide a ﬁlter replacement reminder

every six months. When replacing dirty ﬁlters, use of a face mask is

recommended (lowest class, FFP2).

To replace the ﬁlter, follow the steps below.

1. Disconnect the unit from the power supply.

Heat recovery unit RDAF - Technical manual

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20210329_R5 We reserve the right to make changes without prior notice

OVERHEATING PROTECTION, TEMPERATURE ALARM, ROTOR ALARM, OTHER ALARMS

THERMAL OVERLOAD PROTECTION

The fan motors are equipped with thermal overload protection devices,

which are reset manually by brieﬂy disconnecting the power.

The electric heaters have two thermal overload protection devices, one

automatic and one manual. The automatic overheating protection trips

before the manual one, which means it does not normally need to be

reset.

If the manual overheating protection for the electric heater has tripped

during operation, ﬁrst the power to the unit should be switched off and

then the overheating protection should be reset by pressing the reset

button.

If the manual overheating protection trips again, call qualiﬁed service

personnel.

TEMPERATURE ALARM

Generates an alarm and stops operation if the supply air temperature

drops below +5 °C. The alarm is disabled during defrosting. A 10-min-

ute delay ensures that the supply air temperature has time to rise if

operation has been stopped.

ROTOR ALARM

If the rotor motor stops and the Tacho signal disappears, ﬁve attempts

will be made to restart the rotor (start/stop). If this does not solve the

problem, the unit will stop and the rotor alarm will be indicated.

OTHER ALARMS

The unit has various other alarms, which are shown in plain text in the

ISYteq Touch 3.5 control panel. If the alarm recurs after being cleared,

call service personnel for assistance.

Heat recovery unit RDAF - Technical manual

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20210329_R5 We reserve the right to make changes without prior notice

DIMENSIONS AND WEIGHT

Extract air

Supply air

Exhaust air

Outdoor air

ØD ØD

Size L W H H1 A C ØD E F G J Weight, kg

Mini 950 540 475 442 150 240 160 190 100 38 10 57

Midi 1000 580 510 480 155 270 200 207 100 37 10 67

Maxi 1200 750 685 652 198 355 250 247 195 43 10 109

All dimensions are in mm.

Weight 6 kg

42 42

278 267

375

Reset of manual thermal overload protection

Ø250

PREHEATER FOR RDAF MAXI, GENERATION 2.

Heat recovery unit RDAF - Technical manual

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20210329_R5 We reserve the right to make changes without prior notice

WIRING AND CONNECTION DIAGRAM, EXTERNAL FUNCTIONS

CONTROL CARD

ISYteqTouch

control panel ISYteq Basic

control panel

USB

only for

update

Preheater Maxi, duct air heater

Relay board

Start

Alarm

Control

signal

Modbus

RS485

sensor

Timer 1

Timer 2

L N

10V

B A Ref

10V

Techo

GG0 Y

101100 103102 105104 107106 109108

32 36

Door

switch

Collective

fault alarm

max 24V, 0.2 A

Rotor

Extract air fan

Supply air fan

Temperature

extract air

Temperature

outdoor air

Temperature

supply air

Moisture sensor

extract air

Post Heater

Preheater

Mini, Midi

EXTERNAL FUNCTIONS

Control signal

Preheater Maxi,

supplied with power separately

Start signalAlarms

G0Y

10 11 12 13 14 15 16 17

NOCNCC

Figure 13. The diagram above shows connection of external functions.

Figure 14. Preheater RDAF Maxi.

Timer 1 Timer 2Collective

fault alarm

Max 24V, 200 mA

CO2 sensor

MDI

1 2 3 4 5 6 7 8 9

MDI

+24 V

GND

Output 0 - 10 V

NOC

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DUCT CONNECTION

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

intended for this purpose. Connection must not be made to a smoke or

gas ﬂue. In case of extract air ventilation in premises where a smoke

or gas ﬂue is used (for instance, an open ﬁreplace or heating stove),

an adequate supply air ﬂow must be ensured A kitchen ﬂue must be

installed in accordance with applicable regulations.

DUCT CONNECTION, DUCT INSULATION

Note! During installation, the instructions regarding unit installation and duct insulation must be adhered

to without deviation. Otherwise, there is a risk of condensation and moisture resulting in major damage.

All ﬁgures in this table are recommended values which apply in central Sweden. Please check for local variations.

DUCTS IN WARM SPACES (INDOORS)

The temperature of the air

in the duct is above +10 °C The temperature of the air

in the duct is below +10 °C

No insulation

Supply air ducts (T)

Extract air ducts (F)

Outdoor air duct (U)

Exhaust air duct (A)

Supply air duct (T)

Extract air duct (F)

Fire protection

mesh mat 30 mm

with moisture-proof surface

DUCTS IN COLD SPACES

Supply air duct (T) Outdoor air duct (U)

Extract air duct (F) Exhaust air duct (A)

DUCTS IN LOOSE WOOL

RECOMMENDED INSULATION AND VAPOUR BARRIERS FOR DIFFERENT TYPES OF DUCTING

Ducting type Approved material and

location

Duct in a warm space

Insulation

Vapour

barrier Duct in a cold space Insulation Vapour barrier

Exhaust air (ﬂue)

In kitchen Sheet metal, accessible for

inspection Armaﬂex AF3, 19 mm Yes – –

Between joists and in attic Sheet metal Fire protection E15, Yes Fire protection E15, Only inside

mesh mat 30 mm mesh mat 50 mm building's vapour barrier

Exhaust air (no ﬂue) Sheet metal Mineral wool 25 mm Yes – –

Between joists and in attic Sheet metal Mineral wool 30 mm Yes Mineral wool 30 mm Yes

From tumble dryer Sheet metal Mineral wool 30 mm No Mineral wool 100 mm No

Outdoor air

In kitchen Sheet metal, accessible for

inspection Armaﬂex AF3, 19 mm Yes – –

Between joists and in attic Sheet metal Mineral wool 60 mm Yes Inside building’s vapour barrier Only inside

Mineral wool 60 mm building's vapour barrier

Supply air Sheet metal No requirements Mineral wool at least 80 mm No

Extract air or equivalent.

Roof truss

Moisture barrier

The sheet must be bound

tightly to the duct.

Min thickness 10 cm.

Roof truss

Moisture barrier

The sheet must be bound

tightly to the duct.

Min thickness 10 cm.

Moisture barrier

Roof truss

Moisture barrier

The sheet must be bound

tightly to the duct.

Min thickness 10 cm.

Moisture barrier

Roof truss

DUCT INSULATION

In order for the installation of the unit to be effective, it is crucial that

the installation of the ventilation ducts in the unit, as well as the instal-

lation of ducts through external walls containing insulation and vapour

barriers, roofs and joists, is executed in a professional manner. Other-

wise there is a risk of condensation, resulting in moisture damage.

If older units are replaced, it is also necessary to inspect ducts and

duct insulation for damage and ensure they are of adequate quality.

Supply air ducts (T) and extract air ducts (F), i.e. ducts containing

warm air, which are located in unheated spaces, must be insulated.

The insulation should be installed externally and have a wind-proof

surface.

Outdoor air ducts (U) and exhaust air ducts (A), i.e. ducts ﬁlled with

cold air, which are located inside the building’s vapour barrier, must be

insulated and have a diffusion-proof (moisture-proof) surface. Given the

high degree of heat recovery achieved by the unit, the exhaust air also

gets very cold and must be thermally insulated. Moreover, ducts which

run alongside each other must have a common vapour barrier.

For designations of the various ducts, see “Duct deﬁnitions” on the

next page.

The wall on which the unit is to be installed must be well insulated.

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INSTALLATION OPTIONS AND DUCT DEFINITIONS

INTRODUCTION

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

well-protected under a roof in its original packaging. The Mini/Midi unit

should always be lifted by two people, while the Maxi unit should be

lifted by four people. Protective gloves should be worn.

INSTALLATION OPTIONS

The unit should be positioned as shown in the ventilation drawing. If no

ventilation drawing is available, installation should be done according

to one of the installation options below.

The unit is intended for installation indoors in a cold space, for in-

stance an attic.

LOCATION OF THE UNIT IN HOUSES WITH A DRY,

UNFURNISHED ATTIC.

1. Exhaust air duct

2. T-piece ducting

3. Sealing cap

4. Supply air duct

5. Heat recovery unit RDAF

6. Mineral wool slab, min. 50 mm thick

7. Sleeve

T = Supply air

F = Extract air

U = Outdoor air

A = Exhaust air

Figure 15. Duct deﬁnitions.

10 5 12

>1600

10 51112

LOCATION OF THE UNIT IN BUILDINGS WITH 1½ STOREYS

To prevent accidents and injury: The unit must be

connected to ducting and the door must be closed

before the power is switched on.

The unit must be connected to an earthed power

outlet.

DUCT DEFINITIONS

8. Ducting with bend

9. Roof lead-through with extract air

ventilation

10. Supply air device (roof air supply)

11. Silencer

12. Supply air duct

13. Extract air duct

14. Outdoor air duct

Unheated

space

Minimum distance from combustible

structural components, 20 mm

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INSTALLATION, DUCT CONNECTION

INSTALLATION

The unit should be placed:

• on a mineral wool slab with a thickness of at least 50

mm on a stable surface.

• at a distance of 20 mm between the outermost edges of the casing

and combustible structural components.

INSTALLATION OPTIONS

FREE SPACE FOR INSPECTION

To allow inspection and replacement of components, free space is re-

quired next to the unit door as follows:

RDAF Mini = 640 mm

RDAF Midi = 680 mm

RDAF Maxi = 850 mm

DUCT CONNECTION

RDAF Mini = 160 mm

RDAF Midi = 200 mm

RDAF Maxi = 250 mm

Mineralullsmatta,

tjocklek 50 mm Stabilt underlag

Uteluft, in

Avluft, ut

Frånluft

Tilluft

x 4

Montering av fötter,

kan höjdjusteras ± 10 mm

2 31)

With the unit door at the top (1) or on the side with the electrical con-

nection upwards (2).

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USB

1 N

2 L

3 N

4 L

5 N

70 69 6867 66 65 64

28 3732 33 34 3835 3613 14 15 16

6 L

7 N

8 L

11 N

12 L

Ethernet card

(accessory)

ISYteq Touch 3.5

CONTROL PANEL ISYTEQ TOUCH 3.5 RDKZ-41-3 - INSTALLATION AND CONNECTION

1. Open the control panel using a screwdriver.

2. Lift the display out of the enclosure.

3. Push the connection cable through a suitable hole and if

needed make an outlet for the cable on side of the cover.

4. Mount the enclosure directly on the wall or using the screws in a

junction box.

5. Connect the cable to the back of the display as shown above. NOTE!

Do not touch the electronics.

Push the display back into the enclosure.

6. Check that the control cable is correctly connected to the control

card before switching on the power supply.

Heat recovery unit RDAF - Technical manual

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20210329_R5 We reserve the right to make changes without prior notice

ADJUSTMENT, COMMISSIONING (FOR INSTALLER AND SERVICE PERSONNEL)

SETTINGS

To enter the “Settings” menu:

1. Press the gear cog button.

2. Press the spanner button.

3. In this menu you can set the date, time and language. There is also

the option of resetting the ﬁlter alarm in advance. Installers and ser-

vice personnel can log in and access additional parameters.

DATE / TIME

2. Set the time. Press “Conﬁrm”.

1. Set the date and continue by pressing “Conﬁrm”.

1. Press the appropriate language ﬂag. Press “Conﬁrm”.

SELECT LANGUAGE

Heat recovery unit RDAF - Technical manual

FläktGroup DC_9349GB_

20210329_R5 We reserve the right to make changes without prior notice

Installers and service personnel must log in to access “Settings”.

The default (preset) password is 0000. This password can be

changed.

1. Enter the correct password. Press “Conﬁrm”. Use, for instance, the

back of a pencil for greater precision.

SETTINGS FOR INSTALLER AND SERVICE PERSONNEL

For adjustment of fans, see page 19.

For other settings, see parameter list on page 24.

Heat recovery unit RDAF - Technical manual

FläktGroup DC_9349GB_

20210329_R5 We reserve the right to make changes without prior notice

ADJUSTMENT

FLOW ADJUSTMENT

The speed of the fans is adjusted independently of each other.

NOTE! Flow deviations of up to 25% may occur when

this measurement method is used on a unit with a

rotary heat exchanger. The measured ﬂow values should

only be regarded as indicative. Always perform control

measurement in the supply and extract air devices

Adjustment of air ﬂow and temperature may only be carried out by an

installation engineer or service personnel.

Wrongly adjusted air ﬂows may result in increased

energy consumption and damage to the building.

AIRFLOW CALCULATION

The unit is equipped with four measurement points as per ﬁgure 16

above. Measuring the pressure difference, Dp

in Pa over the rotor

gives the total supply air and extract air ﬂows. The air ﬂow q in l/s is

determined using the following formula:

q = 1.3 x Dpm

where Dp

= measured pressure in point T – measured pressure in

point U or: where Dp

= measured pressure in point F – measured

pressure in point A

PLANNING ADVICE

In a rotary heat exchanger it is not possible to completely eliminate

leakage between supply air and extract air. Air leakage at the seals is

minimised by keeping the pressure difference between the supply air

and extract air ducts as small as possible.

Also check the pressure balance between supply air and extract air.

Lower pressure on the supply air side can result in the transfer of

moisture and odour. This is especially important if Forced mode is

used.

The pressure at point T should be higher than at point F.

The pressure at point U should be higher than at point A.

T = Supply air F = Extract air

U = Outdoor air A = Exhaust air

Heat recovery unit RDAF - Technical manual

FläktGroup DC_9349GB_

20210329_R5 We reserve the right to make changes without prior notice

CONTROL PANEL OPERATION, COMMISSIONING

ADJUSTMENT

There are two ways to enter the adjustment menu.

1. The ﬁrst is to press the question mark on the start screen. The

question mark will not be shown if the menu has been opened pre-

viously.

2. The second is to go to Menu/Settings/Login and select

“2 Adjustment”.

Press “2.1 Start” for a step-by-step guide through the settings required

for adjustment. To change a single value, go directly to a speciﬁc

menu.

The speeds for each operating mode can be changed in two ways:

Option 1 - Press the name

Option 2 - Press the value

STANDARD

The unit can be ordered with two different conﬁgurations:

Standard – set the fan speed in % of max speed

control – set the desired CO

level

Option 1 Option 2

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FläktGroup RDAF Installation guide

Brand: FläktGroup

Model: RDAF

Category: Split-system air conditioners

Type: Installation guide

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