Itho Daalderop HRU 400 Quick start guide

Itho Daalderop
HRU 400
Installation & use
A+

Original document.

3
ä Warning!
Indicates a risk of personal injury to persons and/or serious
damage to the product, installation or surroundings.
ä Attention!
Instruction relevant to the installation, operation, operation or
maintenance of the product. Ignoring this instruction may
cause minor bodily injury to persons and/or serious material
damage to the product, installation or environment.
Note
Instruction relevant to the installation, operation, operation or
maintenance of the product. Ignoring this instruction may cause
minor material damage to the product, installation or environment.
Tip
Don't forget to register the product via the app or the Itho
Daalderop website for additional warranty!
Foreword
This manual is intended for the installer of the ventilation system. It
contains important information about installation, use, maintenance
and malfunctions of the ventilation system.
The installer is responsible for the installation and commissioning
of the unit.
The following definitions are used in this manual to draw attention
to dangers, instructions or directions relating to persons, product,
installation and/or environment.
Although this manual has been compiled with the utmost care, no
rights can be derived from it.
Itho Daalderop reserves the right to change products and manuals
without prior notice.
Due to our continuous process of improving our products, this
document may differ from the product delivered to you. You can
download the latest version of this manual from our website.
Tip
Indications that may be relevant to the installation, operation,
operation or maintenance of the product, not related to injury
to persons or damage to property.

4
Content
1. Safety and regulations 5
1.1. Security 5
1.2. Standards and guidelines 7
1.3. Air supply and exhaust system requirements 7
2. Product information 8
2.1. Living comfort and energy savings 8
2.2. Versions 9
2.3. Accessories 9
2.4. Technical Specifications 10
2.5. Product card information 11
2.6. Capacity charts 12
2.7. Capacity, pressure and power 13
2.8. Dimension drawings 14
2.9. Schemes 15
2.10. Filters 16
2.11. Interface 16
2.12. Valves 17
2.13. Application in a new home 17
2.14. Scope of delivery 18
2.15. Unpacking and checking 18
3. Installation 19
3.1. Installation requirements 19
3.2. Installing the ventilation unit 19
3.3. Connecting the channels 22
3.4. Frost valve opening 22
3.5. Connecting condensation drain 22
3.6. Connecting electrically 23
4. Operation 24
4.1. Ventilation modes 24
4.2. Controls and sensors 25
4.3. App 25
4.4. Subscribe and unsubscribe accessories 26
5. Commissioning 27
5.1. Preparation 27
5.2. Commissioning 27
6. Inspection and maintenance 28
6.1. Inspection and maintenance schedule 28
6.2. Filter warning 29
6.3. Cleaning or replacing filters 29
6.4. Reset filter warning 31
6.5. Cleaning opening frost valve 31
6.6. Detach or replace electronics compartment 32
6.7. Access to internal components 34
6.8. Cleaning or replacing internal components 35
7. Malfunctions 38
7.1. Fault reports 38
7.2. Warning 39
7.3. Blocking 39
7.4. Locking 39
7.5. Diagnosis of faults 40
8. Service parts 44
9. Warranty 46

5
1. Safety and regulations
1.1. Security
● Work on the ventilation system may only
be carried out by approved installers (1) in
accordance with the instructions in the
manual. Only accessories and parts as
prescribed by the manufacturer may be
used.
● Do not use the product for purposes
other than those for which it is intended,
as described in this manual.
● Handle electrical appliances with
care:
-
Never touch the device with wet
hands.
-
Never touch the device when you are
barefoot.
● This product and/or system may be
operated by children aged 8 years and
over and by persons with reduced
physical, sensory or mental capabilities or
lack of experience and knowledge if they
are supervised or instructed in its safe
use and are aware of the dangers of the
product and/or system.
● Cleaning and maintenance by the user
must not be carried out by children or by
persons with reduced physical, sensory or
mental capabilities or a lack of experience
and knowledge without supervision.
● Prevent children from playing with the
product and/or system.
● Do not use the product in the presence
of flammable or volatile substances such
as alcohol, insecticides, petrol, etc.
● Safety instructions must be followed to
prevent physical injury and/or damage to
the product.
● Maintenance and cleaning may
only be carried out after the
appliance has been de-energized.
● The product contains rotating parts.
Therefore, after disconnecting the
product from the power supply, wait at
least 10 seconds before opening or
touching the product, as these parts will
continue to rotate for some time.
● Secure the system against
unintentional reactivation.
● Maintenance instructions must be
followed to prevent damage and
excessive wear and tear.
● The product must not be modified.
● The product is only suitable for a 230
V 50 Hz AC system.
● Make sure that the electrical system
to which the product is to be
connected meets the required
conditions.
● Do not expose the product to
weather conditions.
● Do not place any objects on the device.
● Regularly inspect the product for defects.
In the event of defects, switch off the
product and contact your installer or the
Itho Daalderop service department
immediately.
● Never switch off the product unless
when:
-
The product does not function properly.
-
You want to clean the product.

6
-
Wants to carry out
maintenance on the
appliance.
-
The government advises closing
windows and doors in the event of a
calamity.
●
Take care not to damage the
electrical circuit.
● The electrical connection must
always be easily accessible in order
to switch off the power supply.
●
Do not use the appliance to vacuum
water boilers, heating systems, etc.
● Make sure that the appliance drains into
a drain that is suitable and laid for this
purpose and that drains to the outside.
● Keep valves free and clean.
● If the power supply cable is damaged, it
must be replaced by the manufacturer,
his agency or a qualified person in order
to avoid danger.
1) A certified installer is an installer working for a central heating or
mechanical installation company registered with the Chamber of
Commerce and included in the SEI recognition register (Stichting
Erkenning Installatiebedrijven) or who has a Sterkin recognition.

7
ä Warning!
The specifications and settings of the appliance only comply
with the standards and laws of the country in which the
appliance is sold.
Applications outside this country can lead to very
dangerous situations!
1.2. Standards and guidelines
The installer must ensure that the entire installation complies
with the legal requirements, the regulations contained in this
document and other applicable documentation from the
manufacturer.
All legal requirements and regulations are subject to additions,
amendments or legal requirements that came into force later
apply at the time of installation.
After installation, there must no longer be any health, safety or
environmental risks in accordance with the applicable CE directives.
This also applies to other products included in the installation.
1.3. Air supply and exhaust system requirements
The air supply system shall comply with the regulations in force.
● The ducts to and from the house: steel spiral tube,
internal diameter Ø 180 mm.
● The ducts from and to the outside: vapour-tight insulated
steel spiral tube, internal diameter Ø 180 mm.
● The insulation must be properly (airtight) connected to the
appliance. If air can get between the insulation and the
pipe, condensation will form.
● In the case of horizontal ducts, the air ducts to and from the
house must always be led to the appliance on a slope.
Observe 3 mm per metre of duct length.
● Bracket every bend on the socket, with the exception of
connection to the appliance:
-
If the connecting pipe is shorter than 0.25 m before and
after the first bend, the bracket can be omitted at the first
bend.
-
In any case, the first bracket should be placed at a
maximum distance of 0.5 m from the appliance.
● Horizontal and non vertical ducts: maximum bracket spacing
1 m. In the case of tensile joints, the maximum bracket
spacing is 2 m. Spread lengths between brackets evenly.
● Vertical ducts: maximum bracket spacing 2m. Divide lengths
between brackets evenly.
● Bracket the last element of the connection pipe for the
conduit/shaft. If this last element is a bend, the element in
front of it can also be braced.
● Apply the manufacturer's prescribed brackets.
● Metal connections may be secured with screws.
● Do not use fat, (acid-free) petroleum jelly or oil.
● Mount stress-free.
● Do not mix elements (components) of different materials
and/or fabrications other than those permitted by the
manufacturer.
● Supply and return air ducts must be kept as short as possible.
● Use as few bends as possible.
● If possible, avoid the use of 90° bends.
● If a 90° bend is unavoidable, do not place it within 1 metre of
the appliance.
● Use gable and roof penetrations suitable for a ventilation
unit with heat recovery.

8
2. Product information
2.1. Living comfort and energy savings
Living comfort and energy savings are becoming increasingly
important in housing construction. Nowadays, homes are
increasingly insulated, but unfortunately good insulation often
comes at the expense of the indoor climate. Without good
ventilation, moisture, moulds and dust mites can escape, and the air
in the house can quickly feel 'stuffy' due to an increasing
concentration of CO2 (carbon dioxide). Itho Daalderop produces
equipment that regulates the indoor climate and takes into account
the requirements for comfort and energy consumption in homes.
One of these advanced devices is the Itho Daalderop
ventilation system HRU 400.
The HRU 400 is a balanced ventilation system with heat recovery.
The ventilation unit is equipped with two fans; one for the return
air and one for the supply air.
The ventilation unit ventilates several rooms in the house. By
means of ducts, the kitchen, the bathroom, the toilet and possibly
the indoor storage/laundry room (the 'wet rooms') are connected to
the ventilation unit for the removal of polluted/humid air.
The living room, the bedrooms and possibly the corridor/hallway
are also connected to the ventilation unit by means of ducts, but
here fresh air is supplied.
To ensure good air distribution, the supply and return points in the
rooms to be ventilated are fitted with adjustable supply and return
valves.
The HRU 400 helps to reduce the humidity in your bathroom by
means of the internal RH (Relative Humidity) sensor.
1

9
2.2. Versions
Versions
Artikel Type
Description
Balanced ventilation unit with heat
recovery
03-00584 HRU 400
2.3. Accessories
Article N o Type Description
536-0150
RFT CAR
Wireless control switch with two
positions, one automatic
mode and a timer function
04-00045
RFT-CO2 230V
RFT-CO2 sensor with control -
230 V powered
04-00046
RFT-RV BAT
RFT-RV sensor with control -
battery-powered
03-00062
Spider Base
Climate thermostat
03-00065
Spider Gateway
Spider Gateway
04-00087
RF-Repeater
RF-Repeater
591-1070
FGD 180-50
Sound-absorbing flexible hose, Ø
180 mm, length 50 cm
591-1270
FGD 180-100
Sound-absorbing flexible hose, Ø
180 mm, length 100 cm
04-00109
PS HRU 400
Pot set HRU 400

10
2.4. Technical Specifications
Description
Unit
HRU 400
DIMENSIONS AND WEIGHT
Dimensions (HxWxD)
mm
1064x640x 580
Weight
kg
23
CONNECTIONS
Channel connections top side
mm
4x Ø 180 internal
Side duct connection
mm
2x Ø 180 internal
Drainage of condensation
mm
Ø 32-40 mm external
Frost valve
mm
Ø 80 internal
GENERAL
IP classification
—
IP30*
Safety class
Double insulated
Installation class
2
Filter class
—
ISO Coarse 65% (G4)
RF (integrated)
—
30 m free field, 868 MHz
Wifi (integrated)
—
2.4 GHz
Supply voltage
—
~ 230V - 50Hz
Power connection
—
3-core power cable with
earthed plug L 180 cm)
TECHNICAL PARAMETERS
Thermal efficiency of heat recovery
%
95,5**
Electrical input power of the fan drive,
at maximum flow rate
W
200
APPLICATION
Temperature range
°C
0-40
Relative humidity range
%
5-90 (non-condensing)
* According to standard IEC 60529 2001-02
** According to standard NEN 5138:2004

11
2.5. Product card information
Itho Daalderop
HRU
Description
Symbol
Unit
400
Specific energy consumption class
—
—
A+
Specific energy consumption, under moderate
climate conditions
SEC
kWh/(m2.a)
-44
Specific energy consumption, under warm
climate conditions
SEC
kWh/(m2.a)
-19
Specific energy consumption, under cold
climate conditions
SEC
kWh/(m2.a)
-86
Type of ventilation unit
VE
—
Residential ventilation unit (RVE)
Two-way ventilation unit (TVE)
Type of drive
X
—
Variable speed
Type of heat recovery system
HRS
—
Recuperative
Thermal efficiency of heat recovery
ƞt
%
88
Maximum flow rate
qmax
m3/h
400
Electrical input power of the
fan drive, at maximum flow rate
Pmax
W
138
Sound power level
LWA
dB
53
Reference flow rate
qref
m3/s
0,08
Reference pressure difference
ΔPref
Pa
50
Specific input power
SPI
W/(m3/h)
0,2
Ventilation control
—
—
Central needs-driven
regulation
Control factor
CTRL
-
0,85
Declared maximum percentages for internal
leakage for two-way ventilation units
—
%
1
Declared maximum percentages for external
leakage for two-way ventilation units
—
%
1
Replace warning filter
—
—
On Electronics compartment
Via external controls
Instructions for pre-assembly/disassembly
—
—
www.ithodaalderop.nl
Annual electricity consumption
AEC
kWh
2
Annual heating savings, under temperate
climate conditions
AHS
kWh
46
Annual heating savings, under warm
climate conditions
AHS
kWh
21
Heating saved annually, under cold conditions
climate conditions
AHS
kWh
90

12
HRU 400
180
170300Pa200Pa
160150Pa
150250Pa
140100Pa
130
12050Pa
110
]
W 100
[
P 90
80
70
60
50
40
30
20
10
0 0 5 0 5 0 5 0 5 5505
2 5 7702
1 1 1 1 2 2 2 2 3 3 3 3 4 4
Q [m³/h]
HRU 400
100
2.6. Capacity charts
HRU 400
400
375
350
325
300
275
250
225
200
175
150
125
100
75
50
25
dPa
0
25
50
75
100
125
150
175
200
225
250
275
300
325
350
375
400
425
P [W]
0
25
50
75
100
125
150
175
200
225
250
275
300
325
350
375
400
425

13
2.7. Capacity, pressure and power
Stands
Debiet PressurePercentage
(m3/h)(Pa) (%)
60 7 15 of position 3*
Sound power
level LwA (dBA)
RadiatingFlowDischarge
Booth 1 Minimum
32,3 < 27,30 8
Position 2 Standaard 200 50 50 of position 3* 46,1 44,4 42.3
Position 3 Maximum 400 200 100 from position 3* 61 60 57.5
Automatic mode with CO2-sensor 84 21 of mode 3
Automatic mode without CO2-sensor 160 40 of mode 3
Auto-night stand 240 60 from stand 3
The values given here are the standard values at which the appliance is delivered.
* These values can be set with the Itho Daalderop service app.

14
2.8. Dimension drawings
1) Minimum clearance around the ventilation unit.
Legend
1 Adischarge air from dwelling
A
Power cable right
2 Flow air to dwelling
B
Power cable left
3 Supply air from outside
4 Exhaust air to the outside
Spigots connection diameter: Ø 180 mm
5 Supply air to frost valve
6 Drainage of condensation water
Freeze-flap connection diameter: Ø 80 mm
1064
400 (1)
550 (1)
580
273
153
153
827,5

15
2.9. Schemes
The HRU 400 has a standard 3-position control where the
ventilation flow rate can be adjusted with the Itho Daalderop
service app. In addition, the ventilation unit has an automatic RH
control that functions continuously in the background when the
unit is in the Auto position.
2.9.1. Heat recovery
Before the polluted air is removed to the outside, it is filtered and
passed through the heat exchanger. The fresh outside air is also
filtered and passed through the heat exchanger before it is brought
into the house. In the heat exchanger, the two air currents are
routed past each other (i.e. they are not mixed with each other). As a
result, the energy of the exhaust air is transferred to the fresh supply
air, so that this energy is not lost. In winter, the colder outside air is
thus heated. In summer, the relatively colder indoor air is transferred
to the warmer supply air so that it becomes less warm.
2.9.2. Automatic ventilation based on RH
measurement
The ventilation unit is equipped with an internal RH sensor.
The sensor measures the increase in humidity and
automatically adjusts the ventilation accordingly.
In addition, it is also possible to connect a wireless RH sensor to
the ventilation unit. This sensor can be mounted in any room but
preferably in a room where a lot of moisture is produced, such as
a bathroom.
2.9.3. Summer bypass scheme
The purpose of the summer bypass control is to ventilate the
house with less, or completely without, heat transfer.
The Itho Daalderop heat recovery unit HRU 400 is supplied as
standard with a bypass valve integrated in the unit. This valve
works automatically. The bypass valve ensures that the
extracted indoor air is guided around the exchanger. The
supply air still passes through the air filter and the exchanger.
This automatic regulation will come into effect mainly at night, in
summer. The outside air is then usually cooler than the warm inside
air. The bypass control ensures that the house remains cooler for
longer.
2.9.4. Vorstregeling
The purpose of the frost control is to prevent the heat exchanger
from freezing and to prevent ventilation.
If the temperature of the supply air in the heat exchanger is too far
below freezing point, the unit will regularly open the frost flap at the
top of the unit and draw in warm room air. This warm room air is
mixed with the cold outside air drawn in. At the same time, the
supply fan starts to turn harder (the fan is speeded up so that the
amount of fresh outside air remains the same). Because the fresh
cold outside air is preheated, the warm extracted air from the
house does not have to heat the cold freezing air as much.
Should the outside temperature drop even further, the supply
fan will turn softer (the fan will be turned down to a minimum).
If the outside temperature rises, the above measures are carried
out in reverse order until the danger of frost has passed. The
resident 'always' determines the discharge air quantity.
2.9.5. Automatic ventilation based on CO2
measurement (optional)
A CO2 sensor can be connected to the ventilation unit which
communicates wirelessly with the unit.
The sensor can be mounted in any room (except the bathroom),
but preferably in living rooms and/or bedrooms.
The controllable sensor measures the CO2 concentration in the room. It
translates the measured value into a ventilation wish and
communicates it wirelessly to the ventilation unit to which the sensor
is connected. As the CO2 concentration in the room increases as the
room is used more intensively, ventilation will gradually increase.
Note
Despite the heat exchange, the balanced ventilation system
should not be regarded as a heating or cooling system. It
prevents the loss of heat through ventilation.
Tip
It is possible to place several wireless sensors and controls in
the house, up to a maximum of 20 pieces.
ä Attention !
Control based on wireless sensors (CO2 and/or RH) only works
if the ventilation unit is in Auto/Auto night mode.

16
2.10. Filters
The HRU 400 has two filters, one for each airflow. Both filters
are placed in the ventilation unit in such a way that they protect
the exchanger from contamination. In addition, the filter in the
air supply also protects the user against dust and other
contaminants in the sucked in outside air.
There are different types of filters:
● Filter ISO16890 Coarse 65% (G4) .
This coarse filter is mainly used to filter relatively large dust
particles from the air. This mainly protects the heat
exchanger against penetrating dirt.
● Filter ISO16890 ePM1 55% (F7).
In addition to the coarser dust particles, this fine filter also
stops finer dust particles (pollen). People with allergy
complaints in particular can benefit from this.
Over time, the filters will become dirty, which will increase the
energy consumption of the ventilation unit. It is therefore necessary
that the filters are cleaned according to the instructions and
eventually replaced.
2.11. Interface
The device is equipped with an interface with two buttons and two
LEDs. On the interface, the filter warning can be reset using the
button at the top (A). The LED (1) shows the status in terms of
messages and errors. The wifi connection can be activated with
button (B) and the status of the appliance and that of the wifi mode
is shown with LED (2). In the event of error messages, both LEDs
flash.
Legend
A Dirtfilter reset
B Wifi mode
1 Status LED messages and errors ventilation unit
2 Status LED wifi mode and ventilation unit errors
The LEDs can display the following messages:
Status LEDs
Pattern
Function
Blue*
Led 2
Orange**
LED 1
Red
Both leds
x
Normal operation
x
WIFI mode
x
Filter dirt
x
Error RV sensor
x
Error temperature sensor
x
Fault valve
x
Communication error
x
Volume sensor error
x
Fan module fault
* In normal operation, LED 2 slowly chimes blue. When activating the
wifi mode with button B, LED 2 starts pulsing blue faster and when
the wifi connection is active (pairing mode) LED 2 lights blue.
** At the filter warning LED 1 flashes orange.
ä Attention !
In the case of a new house, the filters of the ventilation unit must
be cleaned after 1 week and replaced after 3 months!
ä Warning!
The HRU 400 must be fitted with the matching original filters
at all times! Without filters, the unit can suffer irreparable
damage.

17
ä Attention !
The building dust can damage the heat exchanger if no filter
is inserted.
2.12. Valves
The quantity of air to be extracted is regulated by law, and the
quantity of air to be blown in must be in balance with this. In other
words, as much air has to be extracted as is supplied. The
appliance regulates this balance on its own. The minimum air
quantity per room is also determined by law. The quantities are
chosen in such a way that no unnecessary energy is wasted and an
optimum indoor climate is still achieved. For example, for each
room the air volume that is extracted and supplied is different in
size. As a result, the extraction and supply valves each have their
own settings.
2.13. Application in a new home
Every new home contains a large amount of building moisture. This
moisture comes from wet building materials such as concrete,
cement, paint and glue. The building moisture disappears best by
ventilating the house well and keeping the temperature as constant
as possible, preferably at room temperature.
Dry-fire - not too fast.
By bringing heat into the house you stimulate the drying process of
the house, this is also known as dry firing. This drying must not be
done too quickly, because drying out too quickly results in a lot of
damage (such as shrinkage cracks). Keep in mind that this drying
process can take up to six months. Set the heating to 15 to 18°C,
and when you are going to live there to 20 degrees. Do not turn up
the heating, because if it gets too hot the materials dry too quickly
and damage can occur.
Ventilation during dry firing.
Good ventilation is essential during the drying process. During the
first year, keep about 5 centimetres of space between the walls
and your furniture so that moisture can escape. In addition, the
mechanical ventilation system must always be on, so never
unplug it from the wall socket. Put the ventilation system in a high
position as much as possible during the first months.
This creates the best possible air circulation in the home.
Note
It is very important that the occupant does not change the
setting of the valves. This disrupts the proper functioning of the
entire ventilation system. The valves may not be exchanged.
ä Attention !
In the case of a new house, the filters of the ventilation unit must
be cleaned after 1 week and replaced after 3 months!

18
Note
Report damage and/or missing parts to your point of sale.
2.14. Scope of delivery
1
2
3
4
Legend
1 Ventilation unit*
2 Power cable
3 Wall bracket set
4 Documentation
* The ventilation unit is put into operation with an app.
2.15. Unpacking and checking
a) Carefully take the equipment out of the box.
b) Check the nameplate details and type for correctness as shown
on the sticker on the outside of the box.
c) Check the equipment for damage and completeness.
d) Check that the necessary documentation and accessories
are packed with the appliance.
e) Place the ventilation unit upright on the ground.

19
ä Warning!
Do not lift or pull the ventilation unit by the spouts at the top.
The unit may be damaged! Lift the unit via the bottom or the
side.
Tip
Itho Daalderop recommends connecting the ducts from the
ventilation unit to the house, and the ducts from the house to the
ventilation unit, with (flexible) silencers. In this way, noise
complaints are prevented as much as possible.
ä Attention !
The appliance must be mounted vertically and level!
3. Installation
3.1. Installation requirements
Please take the following into account before installing the system:
● Mount the ventilation unit
-
in a closed set-up room (where the system can
cause as little noise nuisance as possible).
-
in an installation room that is frost-free.
-
in the vicinity of a socket outlet 230 V, 50 Hz (for earthed
plug); the length of the supply cable is 1.8 m.
-
in the vicinity of a siphon with connection to the
sewerage system (for connection of the condensate
drain with a 40 mm diameter connection).
-
in such a way that the filters can always be easily removed.
For this purpose at least 550 mm of free space is required
on the filter side of the unit.
-
in such a way that it remains accessible from above for
service and maintenance. This requires at least 400 mm
of free space at the top of the appliance.
-
tension-free on a floor/wall with sufficient load-
bearing capacity (min. 200 kg/m2).
● The duct system and the drainage and supply points must
be correctly dimensioned.
● The correct fastening materials must be present.
3.2. Installing the ventilation unit
3.2.1. Installation with the wall bracket set
The HRU 400 can be mounted on the wall using the supplied wall
bracket set.
ä Attention !
To prevent condensation, the duct coming from outside and
the duct going out to the ventilation unit must be insulated
thermally and vapour-tight.
Tip
The opening of the frost valve must remain free at all times. Do
not place any objects on top of the appliance!
107
164
Min. 380
1040

20
After taking the measurements (see the dimension sketch for the
spaces to be kept free around the appliance), you can attach the
lower bracket to the wall using suitable dowels and screws. There
are recesses in the underside of the appliance that allow the
appliance to rest on the lower bracket.
The top bracket consists of two parts: a bracket part that you can
attach to the wall after measuring out, and a U-shaped part that
hooks into the recess in the upper part of the appliance and into the
top bracket, thus fixing the appliance to the wall.
a) After mounting the lower bracket and the upper bracket, tilt the
appliance onto the lower bracket.
b) Then tilt the appliance against the wall.
c) Then the u-shaped part fits in the top bracket and in
the recess at the top of the appliance.