Xpelair Xcell 350V EC BP User manual

Xcell 350V EC BP Whole house heat
recovery unit
Installation and maintenance instructions

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TABLE OF CONTENTS
1.FOREWORD 3
2.SAFETY 3
2.1 General Safety regulations 3
2.2 Safety Precautions, Safety measures 3
3. FOR THE USER 3
3.1 Definitions 3
3.1.1 Balanced Ventilation with heat recovery 3
3.1.2 Bypass 3
3.1.3 Frost Protection 4
3.2 Operation options 4
3.2.1 Display 4
3.2.2 Switches 4
3.3 Switching and setting options 5
3.3.1 Ventilation volume 5
3.3.2 Comfort Temperature 5
3.3.3 Supply off 5
3.3.4 Dirty filter alarm 5
3.3.5 Time delays 6
3.4 Maintenance for the user 7
3.4.1 Cleaning/replacing a filter 7
3.4.2 Cleaning a filter 7
3.4.3 Replacing a filter 7
3.4.4 Cleaning air valves 8
3.5 Malfunctions 8
3.5.1 Malfunction alarm 8
3.5.2 Display 8
3.5.3 What to do in the event of a malfunction 8
3.6 End of useful life 8
4. OPERATION AND SPECIFICATIONS 8
4.1 Balanced ventilation 8
4.2 Heat Recovery unit 9
4.3 Heat recovery 9
4.4Bypass 9
4.5 Frost protection 10
4.5.1 Standard Frost Protection 10
4.6 Technical data 10
5. FOR THE INSTALLER 11
5.1 Installer conditions 11
5.2 Installation of the Xcell 350V EC BP 11
5.2.2 Verification of delivery 12
5.3 Wall mounting 12
5.5.1 Connection of Ducts 12
5.3.2 Condensation drain 13
5.3.3 Electrical connections 13
5.4 Commissioning 14
5.4.1 Menu structure 14
5.4.2 Setting example 14
5.4.3 Time parameters 15
5.5 Adjustment 17
5.6 Maintenance 18
5.7 Malfunctions 20
5.7.1 Malfunction indicator 20
5.7.2 Malfunction indicator without alarm in display 23
6.GUARANTEE 24

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1. FOREWORD
This operating and installation manual contains installation and operating instructions for the Xpelair
Xcell 350V EC BP Whole house heat recovery unit.
READ THIS MANUAL CAREFULLY BEFORE PUTTING THE UNIT INTO OPERATION.
This manual contains all the information and instructions necessary for optimum installation of the Xcell
350V EC BP. It serves also as a manual for maintenance and after-sales service work.
The unit is subject to ongoing improvement and further development. It is therefore possible that your
unit differs slightly from the description here.
We wish you years of comfort and pleasure with your Xcell 350V EC BP.
NOTE: This manual has been produced with the greatest care and attention. However, no rights can be
derived from this. We reserve the right to change the contents of this manual, in whole or in part, at any
time without prior notification.
The Rating plate is located on the top face of the Xcell 350V EC BP.
2. SAFETY
2.1 General Safety Regulations
• Observe the safety regulations and warnings contained in this manual at all times. Failure to do so
may result in damage to the unit or personal injury.
• This appliance is intended for connection to fixed wiring
• Installations and wiring must conform to current IEE Regulations (UK), local or appropriate regulations
(other countries)
• All installations must be supervised by a qualified electrician.
• Store this manual in the vicinity of the unit at all times.
• The instructions on periodic cleaning and/or changing of the filters, the air inlet/outlet valves and the
air inlet/outlet grilles must be strictly observed.
• The proper response of the safety functions and precautions must be checked at regular intervals.
Modifications to the unit are not permitted.
The unit may only be connected to a 230 V AC power supply!
2.2 Safety Precautions, Safety Measures
• It must not be possible to touch the fan wheels with your hand. The unit may therefore only be
operated with the duct system connected. The minimum duct length is 900mm. The unit cannot be
opened without the use of tools.
3. FOR THE USER
3.1 Definitions
3.1.1 Balanced ventilation with heat recovery
The most healthy and energy-efficient form of ventilation is balanced ventilation. A balanced ventilation
system is one that extracts contaminated air from kitchen, bathroom, toilet(s) and, where necessary,
also the utility room, and supplies the same volume of fresh air to the living room and bedrooms. Gaps
under the doors ensure a good through-flow in the dwelling. The air circulation is literally in balance.
Ensure these gaps are never obstructed by draught excluders or deep-pile carpet, for example.
The system will then no longer function (optimally).
Besides ensuring a healthy balance between incoming and outgoing air, the Xcell 350V EC BP also
transfers heat from extracted air to the fresh, usually colder, outside air that it supplies. In this way,
roughly 95% of the extracted heat is recovered, ensuring the air remains at room temperature.
Furthermore, draughts will be a thing of the past.
3.1.2 Bypass
The bypass ensures heat transfer between extracted and supplied air is (temporarily) deactivated. This
means that colder outside air is not preheated prior to entering the dwelling.

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By allowing colder outside air in at night, the indoor temperature of the dwelling can be kept low during
hot days.
The bypass works automatically. All you have to do is enter your comfort temperature in as described
in section 3.3 ‘switch setting options’. The Xcell 350V EC BP will work to the temperature set.
During the winter, ensure that the comfort temperature is not lower than your desired
temperature. If this is the case, it may result in the heating being on and the bypass being open.
This is energy wastage.
3.1.3 Frost protection
In periods of moderate to heavy frosts, the heat exchanger must be protected against frost-damage.
The Xcell 350V EC BP is fitted as standard with an automatic frost-protection system that temporarily
reduces the outside air supply.
A pre-heater is optional, giving the advantage of ensuring balanced ventilation at all times. This option
also offers greater comfort as the supplied air is pre-heated to virtually the inside temperature.
3.2 Operation options
3.2.1 Display
3.2.2 Switches
The 3-speed switch (below) can be fitted to the Xcell 350V EC BP to select the desired ventilation
setting.

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3.3 Switching and setting options
3.3.1 Ventilation volume
Using the switch shown, the Xcell 350V EC BP is adjustable in the following three ventilation positions:
Position 1 - To be used in the event of absence. Ventilation at the minimum required volume
Position 2 - Normal position.
Position 3 - High position. Use this position for cooking and showering and whenever extra ventilation
is required.
The current position is shown on the unit’s display.
• The current ventilation position cannot be altered on the Xcell 350V EC BP display, but only using the
switch.
• After cooking and showering, keep the Xcell 350V EC BP in the highest setting for a little while to
ensure the rapid extraction of surplus moisture and odours; refer also to ‘time delay’ on the following
page.
3.3.2 Comfort temperature
This is the temperature at which the bypass is regulated. Set this to your desired temperature. The
Xcell 350V EC BP will work to the temperature set.
• Regulation occurs automatically. If the outside temperature is too high (e.g. during the day), the
bypass will not be activated.
Setting comfort temperature:
• Press button for 2 sec.
• The current comfort temperature is shown in the display
• Set the desired temperature using the or buttons.
• Press to confirm the chosen temperature.
The Xcell 350V EC BP will now show the current ventilation position again
3.3.3 Supply off
On warm summer days, windows and/or doors are often left open. In principle, automatic supply is then
not needed. Once the supply feature is switched off, your Xcell 350V EC BP operates as an extractor
fan.
Set supply off:
• Press button for 2 sec. and the supply fan is switched off.
• You have deactivated the balanced ventilation and heat recovery functions. Switch them back on as
soon as it gets colder in order to prevent energy wastage and unnecessary expense.
• Press button for 2 sec. and the supply fan is switched on again. The balanced ventilation and
heat/cold recovery functions (with opened bypass) are again available.
3.3.4 Dirty filter alarm
The Xcell 350V EC BP filters both air flows (supplied and extracted air). The filters must be regularly
cleaned or replaced.
In this event, the alarm symbol ‘FiL’ ‘tEr’ will flash in the display.
Filter contamination rates depend on where you live. You can set this in the P24 menu:
‘normal’ (setting 0)
‘rural’ (setting 1)
‘urban’ (setting 2)
The ‘FiL’ ‘tEr’ alarm is displayed earlier for the ‘urban setting, followed by the ‘normal’ setting and then
the ‘rural’ setting.
Setting the dirty filter alarm:
Menu P24:
• Press the [menu] button
• Press the [ok] button

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• Press the button until ‘P24’ is shown in the display
• Press the [ok] button
• Using the or button, select the desired position
• Confirm this with [ok]
• Press the [menu] button twice
The current ventilation position will now be displayed.
3.3.5 Time delays
To make the Xcell 350V EC BP more user-friendly, the unit can be set to the highest position using a
time delay switch that then switches the unit off again after a given period of time so you are not
required to keep walking back and forth to the switch. This function is particularly useful after cooking
and showering.
Depending on the position switch type fitted, the following options are available:
P21 and P22:
Only for an Xcell 350V EC BP with a corded switch and only if your installation is fitted with a second
switch in the bathroom.
P21: activation delay: ‘x’ minutes after being turned on, the unit switches to the high position.
‘x’ is adjustable from 0 - 15 min.
P22: deactivation delay: ‘x’ minutes after being turned on, the Xcell 350V EC BP returns to the position
at which the switch is at that moment. ‘x’ is adjustable from 0 - 120 min.
If P21 has been set to 0, the Xcell 350V EC BP will go directly to the high position for the time set at
P22.
P23:
Only applicable to installations with a corded switch.
If position 3 is briefly activated (< 3 sec.), then the unit will stay in position 3 for ‘x’ minutes and then
returns to the position the switch is on at that moment.
If the position switch is operated within the set time ‘x’, then the unit goes immediately to the set
position. ‘x’ is adjustable from 0 - 120 min. “When this function is activated, “T3” will be shown in the
Xcell 350V EC BP display.
Setting example menu P2(..):
• Press the [menu] button
• Press the [ok] button
• Press the button until ‘P2(…) is shown in the display
• Press the [ok] button
• Using the or button, select the desired time ‘x’
• Confirm this with [ok]
• Press the [menu] button twice
The current ventilation position will now be displayed.

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3.4 Maintenance for the user
3.4.1 Cleaning/replacing a filter
3.4.2 Cleaning a filter
• Electrically isolate the Xcell 350V EC BP
• Remove the Front Cover (A) from the Xcell 350V EC BP.
• Remove filters (B) from the Xcell 350V EC BP.
• Clean the filters with a vacuum cleaner or, if moist: rinse them clean in lukewarm water with a neutral
soap solution.
• Put the filters back into the Xcell 350V EC BP.
• Refit the Front Cover.
• Switch the power back on to the Xcell 350V EC BP.
• Press if ‘Fil’, ‘ter’ is flashing on the display.
3.4.3 Replacing a filter
Replace the filters at least once a year.
• Electrically isolate the Xcell 350V EC BP
• Remove the Front Cover (A) from the Xcell 350V EC BP.
• Remove filters (B) from the Xcell 350V EC BP.
• Remove the two clamps used to fasten the filter material on the filter holders. The filter material can
now be removed from the holder.
• The new filter material can now be placed on the holder. Remount the two clamps.
• Put the filters back into the Xcell 350V EC BP.
• Refit the Front Cover.
• Switch the power back on to the Xcell 350V EC BP.
• Press if ‘Fil’, ‘ter’ is flashing on the display.
Take care that the material is not damaged by the edges of the filter holder.
When using the system for the first time, we recommend cleaning all filters and valves as the system
may become clogged with dust during construction.

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3.4.4 Cleaning air valves
Clean the valves twice a year.
• Remove a valve from the wall or ceiling.
• Clean the valve in soapy warm water, Rinse well and dry. The installer will have set all the valves to
ensure the optimum functioning of the system. Do not therefore adjust the position of the valves.
• Place the valve back in its correct location.
• Repeat this procedure for all the valves.
Ventilation air is supplied and extracted via the valves. Gaps under doors in the dwelling ensure that
the air flows in the right direction.
• Do not obstruct these gaps.
• To maintain the correct amount of ventilation in the correct rooms, the valve setting must not be
altered. Also make sure that the valves do not get swapped.
3.5 Malfunctions
3.5.1 Malfunction alarm
If the Xcell 350V EC BP malfunctions, this will be indicated in the following manner:
3.5.2 Display
The display will show an ‘A’ or an ‘E’ code with a number
3.5.3 What to do in the event of a malfunction
In the event of a malfunction, contact the installer. Note the code shown in the display and the Product
number. This is given on the rating plate on the top of the unit.
The unit should not be electrically isolated unless it has to be deactivated due to a serious malfunction,
or for filter cleaning/replacement or any other urgent reason. When the unit is isolated, the dwelling will
no longer enjoy mechanical ventilation, and this can lead to problems with damp and mould. Protracted
deactivation of the unit must therefore be prevented.
3.6 End of useful life
Consult with your supplier what you should do with the Xcell 350V EC BP at the end of its useful life.
The statutory regulations in force at the time must be observed.
4. OPERATION AND SPECIFICATIONS
4.1 Balanced ventilation
Abalanced ventilation system consists of:
• Outside air (B) and extraction of stale air (A).
• Xcell 350V EC BP heat recovery unit (C).
• Supply valves in the bedrooms and living rooms (D).
• Exhaust valves in the kitchen, bathroom, toilet and, if required, in the storeroom (E).
• Non-powered extractor hood with switch (F).

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4.2 Heat recovery unit
• External coated-plate casing (H)
• Interior of high-quality (expanded) polypropylene (E)PP (not visible, internal).
• 4 connections for ducting (I).
• 2 G4 filters for air purification (J).
• 2 energy-efficient DC motors with high-yield fan (not visible, internal).
• Counter-flow exchanger (heat exchanger) with a thermal yield of more than 95% (not visible, internal).
• Operating panel with read-out for display of data and for setting procedures (K).
• Identification plate (L).
• Condensation drain (M).
• Air connection label (N).
• The Standard Xcell 350V EC BP is for right-oriented air connections to the dwelling. Left handed
versions are also available.
4.3 Heat recovery
• Polluted air is extracted from the kitchen, toilet and shower (A).
• The heat exchanger (B) extracts heat from the exhaust air.
• Fresh outside air is sucked in (C).
• The heat exchanger (B) heats the incoming air without allowing the two airflows to come into contact
with each other.
• The fresh, warm air is supplied to the living room and bedrooms (D).
• The HR (High Yield) counter-flow heat exchanger (B) has such a high thermal yield that extra heating
of the supply air is no longer necessary.
A = Stale air
B = Counter-flow heat exchanger
C = Outside air
D = Supply air
E = Bypass
F = Exhaust air
The balanced ventilation system contributes to energy savings, a healthy interior climate, optimum
living environment, and prevents damp problems.
4.4 Bypass
The Xcell 350V EC BP is fitted with an automatic 100% bypass.
If the ‘bypass’ (E) is activated, then all exhaust air is conducted around the exchanger. The heat
recovery function is then switched off. Cool, fresh air is then supplied to the dwelling, while the warm
(stale) inside air is extracted. This allows for the use of night air to cool the house in the summer. This
so-called ‘free cooling’ is switched on automatically according to the selected comfort temperature on
the display. The Xcell 350V EC BP will work to the temperature set.
The bypass function can only be used in the warmer seasons; the so-called summer operation. This
largely prevents the bypass from staying open during the winter months when the heating is on.

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4.5 Frost protection
The inside air transfers its heat to the outside air within the heat exchanger. This cooling process can
create condensation in the heat exchanger. In periods of moderate to heavy frosts, the heat exchanger
must therefore be protected against frost-damage. The Xcell 350V EC BP is fitted as standard with a
fully automatic frost-protection system; an optional pre-heater may also be fitted. This is also regulated
fully automatically.
4.5.1 Standard frost protection
The Xcell 350V EC BP is fitted as standard with a frost-protection system that temporarily reduces the
outside air supply. This is done by reducing the speed of the intake fan. In the event of extreme cold,
the intake fan can be completely deactivated.
The frost protection system is regulated according to outside temperature, exhaust temperature and
time. The speed of the intake fan is reduced gradually so as not to cause discomfort to the user.
4.6 Technical data
Specifications (normal air volumes / pre-settings)
Power Supply: 230V 50Hz. Cos phi: 0.54-0.60
Position Flow Rate Power (W) Current (A)
Absent 50m³/h @ 10Pa 6 0.09
Low 100m³/h @ 45Pa 16 0.18
Medium 150m³/h @ 105Pa 42 0.39
High 225m³/h @ 195Pa 106 0.87
Maximum 350m³/h @ 225Pa 241 1.78
Sound Power readings
Indication Flow Rate Supply Noise dB(A) Exhaust Noise dB(A)
Absent 50m³/h @ 10Pa 37.3 37.2
Low 100m³/h @ 45Pa 50.4 40.8
Medium 150m³/h @ 105Pa 60.0 48.3
High 225m³/h @ 195Pa 68.9 53.7
Maximum 350m³/h @ 225Pa 74.8 61.1
Specifications
Power Supply: 230V 50Hz. Cos phi: 0.54-0.60
Indication Flow Rate Power (W) Current (A)
Absent 50m³/h @ 10Pa 6 0.09
Low 125m³/h @ 55Pa 23 0.24
Medium 225m³/h @ 195Pa 106 0.87
High 300m³/h @ 350Pa 240 1.77
Maximum 350m³/h @ 225Pa 241 1.78
Sound Power readings
Indication Flow Rate Supply Noise dB(A) Exhaust Noise dB(A)
Absent 50m³/h @ 10Pa 37.3 37.2
Low 125m³/h @ 55Pa 54.2 42.1
Medium 225m³/h @ 195Pa 68.9 53.7
High 300m³/h @ 350Pa 75.7 60.7
Maximum 350m³/h @ 225Pa 74.8 61.1

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General specifications of the Xcell 350V EC BP
Heat Exchanger material Polystyrene
Inner Lining material (E)PP / PA
Efficiency 95%
Weight 39kg
5. FOR THE INSTALLER
5.1 Installation conditions
In order to determine whether the Xcell 350V EC BP can be installed in a certain area, the following
aspects must be taken into account:
• The Installation of the Xcell 350V EC BP must conform to the current IEE Regulations (UK), local or
appropriate regulations (other countries) and also according to the regulations of this manual.
• The place of installation must be chosen so that there is sufficient room around the unit for air duct
connections, intake and exhaust piping and in order to carry out maintenance work.
• The following must be available: air duct connections, electrical connection 230 Volt and facilities for
the condensation drain.
• The roof vents should be made airtight and damp-proof. The outside air intake duct and also the air
exhaust duct must be rendered damp-proof between the roof/wall vent and the Xcell 350V EC BP. This
prevents the formation of condensation on the outside of the ducts.
• A double-walled or insulated roof passage must be fitted to the air exhaust vent. This prevents the
formation of condensation between the roof boarding.
• The air exhaust duct must drain in the direction of the unit.
• The Xcell 350EC BP must be installed in a frost-free space. Condensation water should be drained
frost-free, at a gradient, using a siphon.
• A powered extractor hood must never be fitted to this system.
• We advise fitting both the intake and the exhaust connections of the WHR 930 with silencers directly
onto the unit.
An opening has purposely been left under the inside doors in order to ensure effective and draught-free
airflow in the house. If these openings are obstructed, due to draught excluders or even deep-pile
carpet, the airflow in the house will stagnate. The system will then no longer function at its best.
5.2 Installation of the Xcell 350V EC BP
4.2.1 Transport and unpacking
Take care when transporting and unpacking the unit.
Ensure that packaging materials are disposed of in an environmentally friendly manner.

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5.2.2 Verification of delivery
Contact your supplier immediately in case of damage or an incomplete delivery. The delivery includes:
• Xcell 350V EC BP: check whether it is the correct type on the Rating plate
• Manual
• Fixing bracket.
The Xcell 350V EC BP is supplied in the following types:
• Xcell 350V EC BP left
• Xcell 350V EC BP right
5.3 WaIl mounting
Mount the Xcell 350V EC BP against a wall with a mass of at least 200 kg/m, or on a floor-mounted
frame (optional). This reduces contact noise as much as possible. For other wall types, use anti-
vibration plugs.
Mount the suspension bracket supplied with the unit to the wall, ensuring it is level.
The condensation drain is mounted under the Xcell 350V EC BP.
The stated dimension of 235 mm is an indication only, and is dependent on the type of condensation
drain selected; also refer to ‘condensation drain’.
Ensure a space of at least 1metre below the unit for maintenance purposes.
The Xcell 350V EC BP does not require any space at the sides for effective operation.
5.3.1 Connection of ducts
First mount a straight section of duct of at least 500 mm, or mount the silencer straight. The connecting
air ducts (160mm dia.) must be installed with as little air resistance as possible and must be free from

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air leakage. Do not use flexible ducting and leave room for mounting silencers.
The outside air intake duct and also the air exhaust duct must be rendered damp-proof between the
roof/wall vent and the Xcell 350V EC BP; this avoids formation of condensation on the outside of the
ducts. The air exhaust duct must drain in the direction of the unit.
5.3.2 Condensation drain
Warm exhaust air is cooled by the outside air in the heat exchanger. This causes the moisture in the
indoor air to condense in the heat exchanger.
The condensation water created in the heat exchanger is fed to a condensation drain.
The PVC condensation drain has an outside diameter of 32mm. The drain can be found under the unit
and must be connected to the water seal of the domestic waste-water system via a pipe or a hose. The
upper edge of the water seal must be mounted at least 40mm under the Xcell 350V EC BP
condensation drain. The end of the pipe or tube must exit below the water level.
Ensure that the water seal connected to the domestic waste-water system is always full of water.
Also ensure that the end of the hose is at least 60mm under the level of the water. This prevents the
Xcell 350V EC BP from sucking in any leakage air.
5.3.3 Electrical connections
The Xcell 350V EC BP is fitted with a 1.5m long 5-core cable for mains connection.
The unit is not suitable for connection to the three-phase mains.

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5.4 Commissioning
5.4.1 Menu structure
The [MENU], [↑], [↓]and the [OK] buttons can be used to select the following programs:
Setting time delays Menu P2
Setting ventilation Menu P3
Setting temperature Menu P4
Status read out Menu P5
Malfunction history read out Menu P6
Reset Menu P7
Self-test and contaminated filter setting Menu P8
Menu P2 is directly accessible
Menus P3 to P8 can only be accessed by the installer
For security purposes, a number of buttons must be pressed for longer than 2 sec. to activate them.
This is shown below.
Access to the menus
Sequence Button Display Description
1 Menu P2 Time delays
2 ▼+ ▲(3 seconds) P3 Press the buttons at the same time
3 ▲P4 Temperatures
4 ▲P5 Status
5 ▲P6 Malfunction History
6 ▲P7 Reset
7 ▲P8 Self test / Adjustment
5.4.2 Setting example
Set the medium position of the intake fan to 40%.
Sequence Button Display Description
1 Menu P2 Time delays
2 ▼+ ▲(3 seconds) P3 Press the buttons at the same time.
Ventilation.
3 OK P31 Exhaust Fan. Position 1
4 ▲P35 Select P35
5 OK 50 Current Setting
6 ▼(10x or press continuously) 40 Select 40
7 OK P35 Sets the value to 40
8 Menu P3
9 Menu 1 Fan Position

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5.4.3 Time parameters
P2 Time delays
Seq. No. Description Min. Max Default Unit
21 - Low-voltage input for bathroom switch
- Activation delay in high position: ‘x’ minutes after being
turned on, the bathroom unit switches to
position 3. Only applicable to units with a corded switch and
only if the unit is fitted with a second switch in the bathroom.
0 15 0 Min
22 - Low-voltage input for bathroom switch
- Deactivation delay in high position: ‘x’ minutes after being
turned on, the bathroom unit returns to the selected
position. Only applicable to units with a corded switch and
only if the unit is fitted with a second switch in the bathroom.
0 120 30 Min
23 If position 3 is activated briefly (<3 sec.), then the unit will
remain in position 3 for the time selected in this menu.
If the position switch is operated within the lag time, then the
unit goes immediately to this selected position. Only
applicable to installations with a corded switch.
0 120 0 Min
24 The user can indicate here in which environment the house Is
located. This is then taken into account (see also P82) for
filter indication via the display and an LED on the 3-posltlon
switch (if fitted). The indication is displayed earlier for the
urban setting, followed by normal and then rural.
0 = normal,
1 = rural,
2 = urban
0 1
P3 Ventilation
Seq. No. Description Min. Max Default Unit
31 Exhaust fan in low position 15 98 35/40 %
32 Exhaust fan in medium position 16 99 50/70 %
33 Exhaust fan in high position 17 100 70/90 %
34 34 Intake fan In low position 15 98 35/40 %
35 Intake fan in medium position 16 99 50/70 %
36 Intake fan In high position 17 100 70/90 %
37 Current fan position for exhaust Current value %
38 Current fan position for intake Current value %
P4 Temperatures
Seq. No. Description Min. Max Default Unit
41 Comfort temperature 12 28 20 °C
45 Current value of T1
(temperature of the outdoor air)
Current value °C
46 Current value of T2
(temperature of the supply air)
Current value °C
47 Actual value of T3
(temperature of the exhaust air)
Current value °C
48 Current value of T4
(temperature of the exhaust air)
Current value °C

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P5 Statuses
Seq. No. Description Min. Max Default
54 Bypass present
Always leave this on ‘1’ as the Xcell 350V EC
BP is fitted with a bypass as standard
0
(=no)
1
(=yes)
1
56 Settings:
(‘nl’ – normal air volumes)
(‘HL’ – large air volumes)
See menus P31 to P36 and the table in section
‘adjustment’ for ‘nL’ and ‘HL’ settings
nL HL HL
57 Settings:
Left-hand version (‘Li’ in display)
Right-hand version (‘rE’ in display)
of the Xcell 350V EC BP;
The unit is correctly set ex factory.
Li Re Re
P6 Malfunction history
Seq. No. Description Display text
61 Last malfunction Code according to alarm and malfunction indication
62 Last but one malfunction Code according to alarm and malfunction indication
63 Last but two malfunction Code according to alarm and malfunction indication
P7 Malfunctions
Seq. No. Description 0 1 Default
71 Reset malfunction situation 0 1 0
72 Total reset: Reset to all default values
After this reset, the WHR automatically
requires the Li/RE and nLJHL settings
to be re-entered.

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P8 Self-test I contaminated filter setting
Seq. No. Description Default
81 Self-test Xcell 350V EC BP (P82 on 1) 0
Explanation of self-test:
The display’s green LED’s light up one by one.
Directly after activation of the self-test, the Xcell
350V EC BP switches to its highest speed.
Directly after activation of the self-test, the
bypass valve opens and closes.
0 1 0
82 Filter contaminated setting on display or 3-
position switch:
(to set number of weeks)
P82: The set time is influenced by the settings
in menu P24 and the position at which the Xcell
350V EC BP is set
Influence of P24:
P24 = Indication on display/3-position switch =
set time.
P24 = Indication on display/3-position switch
1.3 x set time,
P24 = Indication on dlsplay/3-position switch
0.7 x set time.
lnfluence of position of Xcell 350V EC BP (if the
position of the Xcell 350V EC BP is changed,
then the filter contaminated alarm meter
directly takes account of this).
Position 1 Indication on display/3-position
switch 1.7 x set time,
Position 2 Indication on display/3-
positionswitch = set time.
Position 3 = Indication on display/3-position
switch = 0.5 x set time.
Example
P82 = 20
P24 = 1
Position of Xcell 350V EC BP: 3
Filter contaminated alarm appears after 20 x
1.3 x 0.5 = 13 weeks.
10 100 26
5.5 Adjustment
Xcell 350V EC BP air specifications

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Normal air volumes ‘nL’ setting equals the default selling of the Xcell 350V EC BP.
Default settings Xcell 350V EC BP ‘nL’
Position high 70%
Position medium 50%
Position low 35%
Default settings Xcell ‘HL’
Position high 90%
Position medium 70%
Position low 40%
• Set the Xcell 350V EC BP in the set-up position by pressing and for 3 sec. at the same
time.
• In the display, ‘inr appears to indicate the Xcell 350V EC BP is in the set-up position. The bypass
valve and the pre-heater valve remain closed at all times. After 30 min., the Xcell 350V EC BP exits the
set-up position automatically
• Close the windows and exterior doors.
• Close the interior doors and check the presence of constructional overflow provisions (min. 12cm² per
l/s).
• Make sure the bypass is closed.
• Check whether both fans work at all three speeds.
• Switch the Xcell 350V EC BP to high speed.
• A: Put all valves in position and adjust them according to the settings supplied or as suggested in the
model dwelling; or
B: If no such data is known, put the valves in position and open them as far as possible. Measure the
air volumes, starting with the intake air and then the exhaust air
If the measured air volumes deviate by more than 10% above or below the nominal air volumes and
most of the deviations are above, make adjustments to ensure that all the deviations are above, If the
majority of the deviations are minus, ensure that all deviations are minus. Also make sure that an
intake valve and an exhaust valve are kept completely open.
• The fan setting can now be adjusted on the display. Select the lowest possible setting in order to
conserve energy, and spread usage across the three settings (high, medium and low), in accordance
with the above graph. The fan settings can be adjusted using menu P3.
• If the current air-volume settings still deviate excessively, extra adjustments can be made to the
valves.
• Check the entire installation again once all valve positions have been set.
• Switch the Xcell 350V EC BP to position 2.
5.6 Maintenance
Inspect the exchanger and the fans once every four years.
• Isolate the fan from the electricity supply.
• Remove the front cover (A)
• Remove the filters (B)
• Loosen the front seal cover by removing the screws (C).
When reassembling the front seal cover, the lower section of the seal must first be inserted behind the
raised edge to ensure a good seal.
• For the right-hand version, remove the bypass duct
• Pull on strap (E) to remove the heat exchanger (F) and leakage tray (G).
Remove the heat exchanger from the leakage tray (G).
Take note: the exchanger may contain water residues!
• Clean the exchanger if necessary. To do so, dip the entire exchanger a few times into warm water
(max. 40°C) containing a non-aggressive detergent solution. Now rinse the exchanger with clean, warm
tap water (max. 40°C). Hold the exchanger with both hands using the green side surfaces and shake
out any excess water.

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Do not use aggressive or solvent detergents for cleaning.
• For the left-hand version, remove the bypass duct
• Remove the display by loosening the 2 screws, then disconnect the display connector from the PCB.
• Disconnect the connectors and the earth lead on the PCB and remove completely the 3 cables with
the 2 grommets
• Remove the complete volute casing by pressing the click fasteners (L).
• Remove the inflow cone by pressing the click fasteners surrounding the volute casing. The fan can
now be cleaned.
• Use a soft brush to clean the fan impellers.
• Use a vacuum cleaner to remove dust.
Take care not to damage the fan impellers.
Take care not to damage the temperature sensors.
Reassemble all these components in reverse order and conduct a self-test according to menu P81.
Make sure the drip tray (F) under the exchanger is mounted correctly.
The screws in the Xcell 350V EC BP should be tightened to a maximum of 1.5Nm. This roughly
corresponds to the speed 2 of an average battery-powered drill.

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LEFT HAND VERSION RIGHT HAND VERSION
5.1 Malfunctions
5.7.1 Malfunction indicator
Warning in display Description
A1 NTC sensor T1 defect (outside air temperature)
A2 NTC sensor T2 defect (supply air temperature)
A3 NTC sensor T3 defect (exhaust air temperature)
A4 NTC sensor T4 defect (exhaust air temperature)
A5 Bypass motor malfunction
E1 Exhaust fan not rotating (M1)
E2 Supply fan not rotating (M2)
E3 No 230V AC current to fan
Prevent water from entering the electrical connections.
Take care that, when fitting the exchanger and leakage tray, the condensation drain pipe is fitted to the
same side as the condensation drain connection.
Check the unit’s condensation drain once every 2 years
Reassemble all these components in reverse order and conduct a self-test according to menu P81.