Xpelair Xcell 150 QV, Xcell 150 QVW Installation And Operating Instructions Manual

1

Installation and

Operating Instructions

Xcell 150 QV

Xcell 150 QVW

Mechanical Ventilation Unit with Heat Recovery

Please ensure these instructions are kept safe and accessible at all times.

2

Table of Contents

1 General Information....................................................................................................................3

2 Components and Materials of Construction .............................................................................3

3 Regulations and Safety Instructions .........................................................................................3

4 Application and Planning ...........................................................................................................4

4.1 Application.......................................................................................................................................... 4

4.2 Operation Overview............................................................................................................................ 4

4.3 MVHR installation planning................................................................................................................. 4

5 Assembly and Installation..........................................................................................................5

5.1 General information: ........................................................................................................................... 5

5.2 Impact noise reduction:....................................................................................................................... 5

5.3 Connecting the ducting: ...................................................................................................................... 5

5.4 Duct connections: ............................................................................................................................... 6

5.4.1 Left-handed installation duct connections (viewed from the top of the MVHR)............................... 6

5.4.2 Retaining bracket to prevent extraction of the heat exchanger...................................................... 6

5.5 Installation.......................................................................................................................................... 7

5.5.1 Wall-mounting the MVHR............................................................................................................. 7

5.5.2 Installation of the ducting.............................................................................................................. 7

5.6 Condensate drain ............................................................................................................................... 7

5.7 Typical installation example ................................................................................................................ 7

5.8 Installation dimensions........................................................................................................................ 8

6 Technical Data.............................................................................................................................9

6.1 Air volume flow rates can be adjusted on the PCB by service technicians only:................................... 9

6.2 Adjustment of air volume flow rate (m3/h) for supply air / exhaust air fans:........................................... 9

6.3 Port pins for the connection of a voltmeter:.......................................................................................... 9

6.4 Factory speed settings:....................................................................................................................... 9

6.5 Technical data: ..................................................................................................................................10

6.6 Applied Energy accessories for manual or automatic operation: .........................................................10

6.7 Applied Energy spares available: .......................................................................................................10

7 Electrical Wiring Diagrams.......................................................................................................11

7.1 Manual 2-speed switch (Xcell 150 QV only) .......................................................................................11

7.2 PCB with 3-speed switch (Xcell 150 QVW only).................................................................................12

7.3 PCB with 3-speed switch & CO2sensor (Xcell 150 QVW only) ...........................................................13

7.4 PCB with 3-speed switch, CO2sensor & up to 3 off Humidistats (Xcell 150 QVW only).......................14

7.5 PCB with 3-speed switch & up to 4 off Humidistats (Xcell 150 QVW only)...........................................15

8 Controller Functions.................................................................................................................16

8.1 MS2 manual 2-speed switch ..............................................................................................................16

8.2 Q3SP automatic 3-speed switch ........................................................................................................16

8.3 QCO2CO2Sensor .............................................................................................................................17

8.4 QHS humidistat sensor ......................................................................................................................17

8.5 Automatic defrost (anti-icing protection) .............................................................................................18

8.6 Fan fault monitoring...........................................................................................................................18

9 Maintenance..............................................................................................................................19

9.1 Filters................................................................................................................................................19

9.2 Removing and re-fitting the filters.......................................................................................................19

9.3 Air Filter Box (optional extra accessory) .............................................................................................19

9.4 Cleaning the heat exchanger .............................................................................................................20

10 Malfunctions..............................................................................................................................20

10.1 Fault locating table.............................................................................................................................20

10.2 Installation of replacement fans..........................................................................................................21

11 Customer Notes (to record details of filter / recuperator cleaning etc.)................................23

Maintenance Log.............................................................................................................................26

GUARANTEE....................................................................................................................................28

3

1 General Information

Read all these instructions & warnings fully before
commencing installation.

These installation and operating instructions must
be observed during installation, operation, service
and maintenance. This MVHR should only be in­stalled and repaired by a qualified service techni­cian. Improper repairs may expose the user to con­siderable danger. Under current regulations, the
installation and operating instructions must be ac­cessible at all times and must be handed to the
technician for reference whenever work is being

done on the MVHR. We would therefore ask that
upon moving out of these premises, you pass the
instructions on to the next tenant/owner. Should
there be any visible damage the MVHR must not be
connected. In this case, it is imperative that you
contact your supplier. Only use original spares in
order to avoid secondary damage. Please ensure
that all packaging materials are disposed of prop­erly in accordance with current environmental re­quirements.

2 Components and Materials of Construction

The MVHR comprises of the following main compo­nents:

Outer Panels:

PE plastic, white
PS plastic, black

Maintenance access cover:

PS plastic

Ducting spigots, Ø 125mm:

PP plastic, light grey

Internal air paths / casing:

EPP, black

Filters:

G4 fitted as standard. External filter box F5 or F7
available as special accessory

Heat exchanger:

The heat exchanger is made from fully recyclable
PS plastic. The heat exchanger integrated into the
MVHR is based on the counter flow principle with
triangular air ducts for supply and exhaust air.

Fans:

Energy-saving EC DC fans with optimal efficiency.

3 Regulations and Safety Instructions

The Xcell150 MVHRs are tested in accordance with
the low-voltage directive 2006/95/EC and EMC
directive 2004/108/EC.

This appliance is not intended for use by persons
(including children and the infirm) with reduced
physical, sensory or mental capabilities, or lack of
experience and knowledge, unless they have been
given supervision or instruction concerning use of
the appliance by a person responsible for their
safety.

Ensure that all relevant safety precautions (correct
eye protection and protective clothing etc) are taken
when installing, operating and maintaining this
MVHR. 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 MVHR is intended for connection to fixed wir­ing. A means for disconnection must be incorpo­rated in the 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. It is the installer’s responsibility to ensure
that the appropriate building codes of practice are
adhered to.

This MVHR must not be installed near to sources of
direct heat such as cookers/grills or where ambient
temperatures may exceed 50•C.
When the MVHR is installed in a room containing a
fuel burning appliance, precautions must be taken
to avoid the backflow of gases into the room from
the open flue of the fuel burning appliance.

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 unit may only be connected to a 220-240V AC
power supply.

The following applications / installations are
prohibited:
 The use of excessive fat-contaminated exhaust

air, extracting explosive gases, extracting parti­cle-contaminated air, extracting adhesive par­ticulate matter.

 Installing the MVHR outdoors
 Connecting extractor hoods in the ventilation

system

Servicing of the MVHR may only be carried out by a
qualified service technician. Contact details for
authorised servicing by Xpelair approved techni­cians can be found on the back of this booklet.

4

4 Application and Planning

4.1 Application

This MVHR is intended for installation in ventila­tion systems in houses, residential buildings and
light commercial applications e.g. offices and
meeting rooms etc. Upon completion of the sys­tem, there should be no safety, health or envi­ronmental risks present. The manufacturer of
the MVHR assumes no liability for this.

4.2 Operation Overview

Using two fans, each above a filter in separate
ducts, the MVHR draws in external air from the
outside and exhaust air from odour­contaminated and moisture-laden rooms
(kitchen, bathroom, WC) in the house. Both of
these air flows are passed through a cross
counter flow heat exchanger whereby the ex­haust air releases heat and the external air ab­sorbs heat. The air ducts are separated from
one another to prevent odour pollution between
external and exhaust air.
Using suitable air ducts and adjustable air inlet
valves (separate accessories), the heated exter­nal air is blown into the house and the cooled
exhaust air is ducted out of the building.
There are numerous accessories available for
controlling the MVHR, see section 6.6.

4.3 MVHR installation planning

MVHR system designs must comply with the
current standards or the approved edition on the
original planning consent.

Approved documents for Building Regulation in
England and Wales:

Part B:

 Approved Document B (Fire Safety) -

Volume 1: Dwellinghouses.

 Approved Document B (Fire Safety) -

Volume 2: Buildings other than dwel­linghouses.

Part F:

 Approved Document F - Ventilation.

Part L – Dwellings:

 Approved Document L1A: Conservation

of fuel and power (New dwellings)

 Approved Document L1B: Conservation

of fuel and power (Existing dwellings)

Part L – Buildings other than dwellings:

 Approved Document L2A: Conservation

of fuel and power (New buildings other
than dwellings)

 Approved Document L2B: Conservation

of fuel and power (Existing buildings
other than dwellings)

Scottish Building Standards approved technical
handbooks:

Domestic Handbook:

 Section 2 – Fire
 Section 3 – Environment
 Section 6 – Energy

Non-domestic Handbook:

 Section 2 – Fire
 Section 3 – Environment
 Section 6 – Energy

5

5 Assembly and Installation

5.1 General information:

The MVHR should be aligned horizontally using
a spirit level (for reliable condensate drainage).

The mains voltage must be 220-240V / 50-60
Hz.

If mounting on low density walls i.e. plaster
boarded stud walls use the following fixing
method:

 Use 15 mm nominal plywood backing board

to connect directly to the wall internal frame
stud and then mount the MVHR unit on the
plywood.

 Ensure internal thermal or sound insulation

is installed inside the stud wall to prevent
reverberation.

The MVHR must be installed in a frost-free room
preferably within the thermal envelope in order
to keep heat losses via the MVHR surfaces and
ventilation ducting to a minimum. Cellars, store
rooms and insulated attics are suitable for this
purpose.

The MVHR may only be installed in dry, non­explosion-proof rooms (protection category IP

20). The ambient temperature must not exceed
+50°C.

This MVHR must not be fitted in rooms or areas
of the house with strong odours, which could
then permeate into the MVHR and contaminate
the fresh air supplied from the MVHR.

The following criteria must also be met:

 Access is required for maintenance

work (e.g. changing the filter)

 The condensate drain must be con-

nected to a closed water trap and must
have a sufficient gap. Approx. 50cm is
ideal.

 If the condensate drain is located in a

frost-prone area, then heat tracing must
be provided.

5.2 Impact noise reduction:

With installation on wooden floors or other vibra­tion-prone components, there may be combined
impact noise (use foam rubber mounts).

5.3 Connecting the ducting:

To prevent the transmission of vibrations, the
ducting should be connected flexibly to the
MVHR (e.g. using flexible ducting or fabric duct
fittings).

All ducting located in loft spaces and roof voids
etc., which are unheated, must be insulated, to­gether with the duct runs from the unit to atmos­phere.

All ducting fitted to the spigots on the MVHR
should be secured in place with jubilee clips or a
suitably sized plastic cable tie.

Dia. 125mm duct spigots

6

5.4 Duct connections:

Dwelling Extract Dwelling

Supply

Atmosphere

Intake Atmosphere

Discharge

For ease of installation the duct connections are
located on top of the MVHR.

- When viewed from the front of the MVHR in a

right handed installation, the two duct connec­tions on the left hand side are for:
 Drawing in fresh air from the outside (At-

mosphere Intake)

 Extracting used air from the building (Dwell-

ing Extract)

- When viewed from the front of the MVHR in a

right handed installation, the two duct connec­tions on the right hand side are for:
 Extracting the used air out to atmosphere

(Atmosphere Discharge)

 Supplying the heated fresh air into the

building (Dwelling Supply)

- The Xcell 150 MVHR can be installed right or

left-handed without any additional modification,
i.e. the mounting brackets supplied with the
MVHR can be fitted to the front or the rear, and
therefore the duct connections can be deter­mined on-site. See the diagram below for the
left hand duct connections.

Right-handed installation duct connections

5.4.1 Left-handed installation duct connections (viewed from the top of the MVHR)

Atmosphere Discharge

Atmosphere Intake

Dwelling Extract

Dwelling Supply

5.4.2 Retaining bracket to prevent extraction of the heat exchanger

Once the MVHR has been mounted in the right or left -handed orientation, the heat exchanger retaining bracket
supplied (see picture below) must be fitted to the front of the MVHR as follows:

 Remove the round plastic access cover on the front of the MVHR by turning it to the left.
 Fit the retaining bracket and retaining screw supplied with the MVHR.
 Replace the maintenance cover by turning it to the right.

Important: The heat exchanger must only be removed for cleaning. Before removing
the heat exchanger disconnect the MVHR from the mains supply.

7

5.5 Installation

5.5.1 Wall-mounting the MVHR

For wall-mounting the MVHR, three wall-mounting
brackets are supplied.

 Mark out the fixing holes for the wall-mounting

brackets using the diagram provided and drill
the holes to suit the fixing screws to be used.

 Precisely align the three wall-mounting brackets

on the wall using a spirit level and fix the three
wall-mounting brackets to the wall with suitable
fixing screws.

 Remove two screws from the top of the MVHR

which align with the holes in the top wall­mounted bracket. Remove the four screws from
the bottom of the MVHR which align with the
slots in the two bottom wall-mounted brackets.

 Place the MVHR on the three wall-mounted

brackets and fix in place by re-fitting the six
screws previously removed.

5.5.2 Installation of the ducting

When installing ducting, care should be taken to
ensure it is properly supported and secure with
joints properly sealed. Flexible ducting should only
be used for final connections with special care
taken to avoid restrictions and other conditions
which will restrict air flow.

5.6 Condensate drain

A condensate drain must be fitted to run to the
building waste water system in accordance with the
Building Regulation H1.

The condensate drain tube is connected to the
MVHR through the hole on the underside of the
plastic base. The condensate drain tube can be
adapted to the installation requirements. It is impor­tant that the drain tube is positioned higher than the
water surface of the water trap and that the drain
tube ends within the water head of the water trap.

The condensate drain tube should be checked an­nually and cleaned if necessary. A condensate
drain tube (Ø 20mm and 1.0m long) is supplied with
each MVHR. The water trap must be purchased
separately from a local plumbing stockist.

5.7 Typical installation example

 Exhaust air from the rooms

(kitchen/bathroom/toilet)

 Supply air into the building

(living rooms/bedrooms/children’s rooms)

 External air (fresh air) with vapour diffu-

sion-resistant insulation

 Outgoing air from inside to outside with

vapour diffusion-resistant insulation

8

5.8 Installation dimensions

9

6 Technical Data

6.1 Air volume flow rates can be adjusted on the PCB by service technicians only:

The adjustment potentiometers (3x blue) for the
supply air fan and (3x red) for the exhaust air fan
are shown on the picture opposite. Port pins for
connection of the voltmeter are also provided.

6.2 Adjustment of air volume flow rate (m3/h) for supply air / exhaust air fans:

Depending on the fan speed selected (1, 2 or 3) the EC fans have a specific control voltage of between

1.7 V minimum up to a maximum of 10.0 V. The control voltage for the supply air and exhaust air fans is
adjusted via each set of three potentiometers on the PCB (speeds 1, 2 and 3).

S1 – Supply air speed 1 - blue pot and S 1 – Exhaust air speed 1 - red pot
S2 – Supply air speed 2 - blue pot and S 2 – Exhaust air speed 2 - red pot
S3 – Supply air speed 3 - blue pot and S 3 – Exhaust air speed 3 - red pot

Turning the potentiometer to the right increases the control voltage of the EC fans and turning it to the left
reduces the control voltage.

6.3 Port pins for the connection of a voltmeter:

Via port pins on the PCB, the control voltage for each speed setting can be measured. The control volt­age for the exhaust air and supply air fans can be set separately at between 1.7 V and 10.0 V as de­scribed above. See also the wiring diagrams in section 7.

6.4 Factory speed settings:

Speed 1: 50 m3/h - Low speed – preferably at night or during periods of absence
Speed 2: 100 m3/h - Normal daytime operation
Speed 3: 150 m3/h - Boost setting for increased air exchange

Note:

When the MVHR is being used with a manual 2-speed switch, only speeds 2 and 3 will apply.

10

6.5 Technical data:
Technical data Units Specification

Voltage / Frequency V / Hz ~ 220-240V / 50-60 Hz
Max. current consumption A 0.60
Power consumption - Speeds 1, 2, 3 W 26 / 48 / 80
Air – volume flow rate - Speeds 1, 2, 3 mƒ/h 50 / 100 / 150
Air volume flow rate at 90 Pa Static Pressure Pa 150m3/h
Protection category IP 20
Max. ambient temperature „C 50
Dimensions (without ducting) - W x H x D mm 600 x 595 x 425
Weight of appliance Kg 17.5
Air connections mm

 125

Condensate pipe connections mm

 20
Filter class - G4
Efficiency of heat exchanger % Up to 90%
Sound pressure level (measured at a distance of 1m) - Speeds 1, 2, 3
Sound pressure level (measured at a distance of 3m) - Speeds 1, 2, 3

dB (A)

29.5 / 32.0 / 39.0

20.0 / 22.5 / 29.5

6.6 Applied Energy accessories for manual or automatic operation:
Description

Part

Number

Notes

MS2 controller 23513AW

The manual 2-speed switch is suitable for the Xcell 150 QV model
only. This switch can be flush or surface mounted.

QCO2controller 96003AA

The CO2sensor is suitable for the Xcell 150 QVW model only.
Only 1 off CO2sensor can be used per MVHR unit.

Q3SP controller 96005AA

The automatic 3-speed switch is suitable for the Xcell 150 QVW model
only. This switch can be flush or surface mounted.

QHS sensor 96009AA

The Humidistat sensor is suitable for the Xcell 150 QVW model only.

Note:

1. When using Humidistats in conjunction with the Q3SP 3-speed
switch a maximum of 4 Humidistats can be connected.

2. When using Humidistats in conjunction with the Q3SP 3-speed
switch and a CO2sensor a maximum of 3 Humidistats can be
connected.

Air filter box (without filter) 45014AA

This additional filter box may be fitted to the MVHR system to protect
allergy sufferers against environmental pollution with the use of finer
filters. The filter box is installed immediately after the supply air outlet.

Class F5 or F7 panel filters are available as the filter elements.
Class F5 panel filter for air
filter box

95045AA F5 filter used in the air filter box only.

Class F7 panel filter for air
filter box

95047AA F7 filter used in the air filter box only.

Defrost Heater Unit 44001AA

This defrost heater unit may be fitted to the MVHR ducting system to

pre-heat the air intake from atmosphere to prevent the build up of ice

in the heat exchanger when the external air temperatures are below

freezing.

6.7 Applied Energy spares available:
Description Part Number

Terminal Cover 44301SK
Heat Exchanger 44302SK
Motor (Outgoing Air) 44303SK
Motor (Supply Air) 44304SK
G4 Filters (pack of 2) 44305SK
Control PCB 44306SK
20mm Cable Clamp 44307SK
12mm Cable Clamp 44308SK

11

Unit Connection

Terminals

Xcell 150 QV controlled by a 2-Speed (MS2) Controller.

Xcell 150 QV

Internal Terminals

Green /

Yellow

Brown

Blue

(Bl)

(Bn)

(G/Y)

1 Phase

(220-240Vac)

(50/60Hz)

N

Fuse

L

NE~

N

L

L

(Bn)

(Bl)

(G/Y)

10V

O/P

0V

Fused Switch Spur

(By Others).

MS2Controller

(23513AW).

10V
O/P

0V

7 Electrical Wiring Diagrams

7.1 Manual 2-speed switch (Xcell 150 QV only)

12

TT

T

T T

T

Transformer

Jumper position:

Jp1 = open

Jp2 = closed

Jp3 = open

Jp4 = closed

Jp5 = open

Jp6 = closed

Jp7 = open

Jp8 = closed

Jp9 = open

Jp10 = open

FusedSwitch Spur

(ByOthers).

AEPRef: Xcell 150-04e-a

Q3SPController

(96005AA).

Green/

Yellow

Brown

Blue

1 Phase

(220-240 Vac)

(50/60Hz)

Fuse

L

NE~

(Bn)

(Bl)

(G/Y)

FusedSwitchSpur

(ByOthers).

N

L

7.2 PCB with 3-speed switch (Xcell 150 QVW only)

13

TT

T

T T

T

Jumper position:

Jp1 = open

Jp2 = closed

Jp3 = open

Jp4 = closed

Jp5 = open

Jp6 = closed

Jp7 = open

Jp8 = closed

Jp9 = open

Jp10 = closed

Transformer

Gree n /

Yello w

Brow n

Blue

1 Phase

(220-240Vac)

(50/60Hz)

Fuse

L

NE~

(Bn)

(Bl)

(G/Y)

Fused Switch Spur

(By Others).

N

L

AEP Ref: Xcell 150-03e/a

QCO Controller

(96003AA)

Q3SP Controller

(96005AA)

7.3 PCB with 3-speed switch & CO2sensor (Xcell 150 QVW only)

14

TT

T

T T

T

Jumper position:

Jp1 = open

Jp2 = closed

Jp3 = open

Jp4 = closed

Jp5 = open

Jp6 = closed

Jp7 = open

Jp8 = closed

Jp9 = open

Jp10 = closed

Transformer

Q3SP Controller

(96005AA).

QHSController

(96009AA).

QCOController

(96003AA).

QHS Controller

(96009AA).

QHS Controller

(96009AA).

Fused Switch Spur

(ByOthers).

Green/

Yellow

Brown

Blue

1 Phase

(220-240 Vac)

(50/60Hz)

Fuse

L

NE~

(Bn)

(Bl)

(G/Y)

Fused Switch Spur

(ByOthers).

N

L

AEPRef: Xcell 150-05e-a

7.4 PCB with 3-speed switch, CO2sensor & up to 3 off Humidistats (Xcell 150 QVW only)

15

TT

T

T T

T

Transformer

Jumper position:

Jp1 = open

Jp2 = closed

Jp3 = open

Jp4 = closed

Jp5 = open

Jp6 = closed

Jp7 = open

Jp8 = closed

Jp9 = open

Jp10 = closed

Q3SP Controller

(96005AA).

QHSController

(96009AA).

QHS Controller

(96009AA).

QHS Controller

(96009AA).

QHSController

(96009AA).

FusedSwitchSpur

(ByOthers).

Green/

Yellow

Brown

Blue

1 Phase

(220-240 Vac)

(50/60Hz)

Fuse

L

NE~

(Bn)

(Bl)

(G/Y)

Fused SwitchSpur

(ByOthers).

N

L

AEPRef:Xcell 150-06e-a

7.5 PCB with 3-speed switch & up to 4 off Humidistats (Xcell 150 QVW only)

16

8 Controller Functions

8.1 MS2 manual 2-speed switch

Refer to section 7.1 for the relevant wiring diagram. This switch option is for manual control only and therefore
none of the automatic control accessories listed below are compatible with this switch.

Minimum size of 3-core cable to be used: Power supply – 1.5mm…

Switch – 0.5mm…
Note – use a spanner to tighten all cable glands

Settings:

 Speed 1: Normal operation
 Speed 2: Boost setting for increased air exchange

8.2 Q3SP automatic 3-speed switch

Refer to sections 7.2, 7.3, 7.4 and 7.5 for the relevant wiring diagrams and additional controllers that are com­patible with the 3-speed switch. With jumper 8 selected on the PCB, the 3-speed switch is active.

Minimum size of 3-core cable to be used: Power supply – 1.5mm…

Switch – 0.5mm…
Note – use a spanner to tighten all cable glands

Key features:

- Plus and minus keys to manually change speed

- 3 LEDs for speed indication / white housing

- Up to 10 off 3-speed switches can be connected in parallel to each MVHR.

Indicators:

- Moisture Protection LED 1 flashes briefly every second

Important: an interval time is programmed into the Moisture Protection setting.

Interval time: 17 mins. ON

13 mins. OFF, etc.

- Speed 1 LED 1 on

- Speed 2 LED 2 on

- Speed 3 LED 3 on

- MVHR OFF* LEDs 1+2+3 off

- Filter service LED 1 flashes quickly continuously (until reset as described below)

- Timer reset LEDs 1+2+3 flash 5 times in quick succession (to acknowledge reset is complete)

- Fault alarm LEDs 1+2+3 flash every second

- Fault alarm reset Mains voltage briefly interrupted

Settings:

- MVHR On* Press plus key

- MVHR Off* Press minus key until speed 0 is reached, i.e. 3>2>1>Moisture Protection>0,

MVHR OFF

- Reset timer Press plus and minus keys together and hold for 2 seconds

- Speed 3 Speed 3 time-limited (only when no other controllers are used alongside the 3-speed

switch): after 1 hour, the MVHR automatically switches back to fan speed 2

 On/off function (only possible when no other controllers are used alongside the 3-speed switch) can be

disabled with jumper 9 on the PCB. This means the speed switches from Ventilation to Moisture Protec­tion – the lowest fan speed.

Filter service indicator:
The period for the filter service timer (3 months) is set and stored and cannot be changed.
Once the period of 3 months has expired, the switch will indicate that a filter serice is necessary whereby the
LED for fan speed 1 flashes every second.
Once the filter has been successfully serviced i.e. cleaned or changed, the filter service timer on the switch can
be reset by pressing both OPERATING KEYS (and holding for 2 seconds) and the filter service indicator on the
switch will go out. Resetting is acknowledged by LED 1 flashing quickly 5 times.

In the event of a full MVHR service outside the above 3 month period, the timer can also be reset, without the
filter service timer having completed its runtime, by pressing both operating keys together and holding for 10
seconds. Resetting is acknowledged by LED 1 flashing quickly 5 times.

17

8.3 QCO2CO2Sensor

The CO2sensor will only function in conjunction with the automatic 3-speed switch, refer to sections 7.3 and 7.4
for the relevant wiring diagrams and associated controllers that are compatible with the CO2sensor. With
jumper 10 selected on the PCB, the CO2sensor is active.

Minimum size of 3-core cable to be used: Power supply – 1.5mm…

Switch – 0.5mm…
Note – use a spanner to tighten all cable glands

The MVHR only reacts to the CO2sensor when fan speed 2 is activated on the 3-speed switch. Fan speed 2 is
always displayed on the 3-speed switch, regardless of whether the CO2values are displayed as <900 ppm
(speed 1) or >1100 ppm (speed 3) on the CO2sensor. With this setting, the CO2sensor is always prioritised. As
soon as the Moisture Protection speed, speed 1 or speed 3 is manually activated on the 3-speed switch, the
CO2sensor is deactivated.

Switchpoints of the CO2sensor:
> 1.5 V MVHR switches from speed 2 to speed 1; < 900 ppm
> 5.0 V MVHR switches from speed 1 to speed 2; > 1000 ppm
> 7.5 V MVHR switches from speed 2 to speed 3; > 1100 ppm
< 5.0 V MVHR switches from speed 3 to speed 2; < 1000 ppm

8.4 QHS humidistat sensor

Refer to sections 7.4 & 7.5 for the relevant wiring diagram.

Minimum size of 3-core cable to be used: Power supply – 1.5mm…

Switch – 0.5mm…
Note – use a spanner to tighten all cable glands

This product is designed to measure humidity and temperature in indoor applications.
It uses a capacitive sensor element for the humidity measurement. The humidistat housing can be fixed directly
on the wall or flush mounted.

Note:
When using humidistats in conjunction with the 3-speed switch a maximum of 4 humidistats can be connected.
When using humidistats in conjunction with the 3-speed switch and a CO2sensor a maximum of 3 humidistats
can be connected.

18

8.5 Automatic defrost (anti-icing protection)

In order to prevent the heat exchanger from freezing when the outside temperature is low, a frost protection moni­tor has been integrated (Xcell 150 QVW models only).

Two temperature ranges can be set via the PCB jumpers 4 and 5 (see table below).
Option 1 (Factory default setting):
If the temperature in the outgoing air duct falls below 4°C the supply air fan will stop (the exhaust air fan will remain

on). When the outgoing air temperature reaches 7°C again the supply air fan comes back on automatically.
Option 2:
If the temperature in the outgoing air duct falls below 6°C the supply air fan will stop (the exhaust air fan will remain

on). When the outgoing air temperature reaches 9°C again the supply air fan comes back on automatically.
Settings table:

Option

Temperature

(outgoing air)

Temperature

(outgoing air)

Jumper 4 Jumper 5

1 + 4°C + 7°C 1 0
2 + 6°C + 9°C 1 1

8.6 Fan fault monitoring

Should the external air / supply air fan fail, the exhaust air / outgoing air fan will switch off automatically.
Fault indication:
On the 3-speed switch, all 3 LEDs will flash.
Should the exhaust air / outgoing air fan fail, the external air / supply air fan does not switch off.
Fault indication:
On the 3-speed switch, all 3 LEDs will flash.

Using the ^ key, the external air / supply air fan speed can be switched down in stages until OFF is reached,
whereby the fault indicator will also go out.

Resetting is executed by briefly switching off the mains voltage.

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9 Maintenance

9.1 Filters

The MVHR should never be operated without filters. However, depending on the actual volume of contaminants in
the environment, the filters (external air and exhaust air from the MVHR) need to be checked and cleaned at least
twice a year and replaced at least on an annual basis. The original external / exhaust air filters contain G4 filter
fibre enclosed in a cardboard frame. Replacement G4 filters are of a frameless moulded construction. Contact de­tails for authorised servicing by Xpelair approved technicians can be found on the back of this booklet.

9.2 Removing and re-fitting the filters

 Disconnect the MVHR from the mains supply.
 Remove the Access Hatch by turning it to the left.
 Remove the two filters from the MVHR(external air and exhaust air - see picture below).
 Insert cleaned or new filters into their correct positions in the MVHR. Please note the clean side of the filter

is placed next to the Heat Exchanger.

o Filters can be cleaned by gently knocking together to remove dust / dirt.

 Replace the Access Hatch.
 Switch the mains supply back on.
 The MVHR is ready to recommence operation.

9.3 Air Filter Box (optional extra accessory)

The MVHR is fitted with G4 filters as standard. To protect allergy sufferers against environmental pollution, for ex­ample, it may be useful to install a filter box with finer filters. These filters are designed to offer the longest service
life and lowest pressure loss and are installed in a box immediately after the supply air outlet. Class F5 or F7 panel
filters are available as the filter elements. The fine filters should be checked along with the appliance filters. Please
contact the UK sales office for further details, contact details can be found on the back of this booklet.

Please note:
If the external air is drawn in via a geothermal heat exchanger, a G4 class filter should be installed in the intake

tower.

20

9.4 Cleaning the heat exchanger

The heat exchanger should be cleaned by a specialist technician as and when required depending on the level of
contamination, but at least every 2 years. Contact details for authorised servicing by Xpelair approved technicians
can be found on the back of this booklet.

 Disconnect the MVHR from the mains supply.
 Remove the Access Hatch by turning it to the left.
 Remove the retaining bracket located in front of the Heat Exchanger by removing the screw.
 Carefully pull the Heat Exchanger out forwards, keeping it horizontal to avoid damaging the EPP housing.
 Thoroughly rinse the Heat Exchanger with lukewarm water and allow all the water to drain off.
 Residual moisture will evaporate when the MVHR is operated.
 Carefully insert the cleaned Heat Exchanger, keeping it horizontal to avoid damaging the EPP housing.
 Replace the Heat Exchanger retaining bracket and retaining screw.
 Replace the Access Hatch.
 Switch the mains supply back on.
 The MVHR is ready to recommence operation.

10 Malfunctions

Important: Servicing of the MVHR may only be carried out by a qualified service technician. Contact details for

authorised servicing by Xpelair approved technicians can be found on the back of this booklet.

10.1 Fault locating table

FAULT / MALFUNCTION CHECK POSSIBLE CAUSE

Supply air or exhaust air fan does
not work

The mains supply is on and all 3
LEDs on the 3-speed switch are
flashing.

- External air / supply air fan

defective

- Exhaust air / outgoing air fan

defective

- Fan blade catching on inner

EPP housing

- PCB defective (Xcell 150 QVW

models only)

- Contact fault on motor lines

Supply air or exhaust air fan does
not work

The mains supply is on and no
LEDs on the 3-speed switch are
flashing.

- Mains supply interrupted

- Contact fault

- Fuse has blown

Air volume flow rate (m3/h) in sup­ply air or exhaust air is too low

LED on the 3-speed switch is flash­ing - filter service indicated.

- Filter service period has ex-

pired

No water coming through conden­sate drain hose

Drops of water on the underside of
the MVHR

- No water in siphon

- Condensate water drain

blocked

Noise coming from the MVHR Fans are noisy

- Increased air resistance due to

contaminated filters / heat ex­changer

- Obstruction in the duct system

- Room air regulator valves not

open wide enough

- Fan blade touching inner EPP

housing

This table is subject to technical amendments

21

10.2 Installation of replacement fans

Should either fan develop a fault and need to be replaced please contact the UK sales office to order replacement
fans or the UK Customer Care / Technical helpline to arrange for fan replacement by Applied Energy Products
Limited, or our approved agents, contact details can be found on the back of this booklet.

1. Disconnect the MVHR from the mains supply.

2. Twist anti-clockwise & remove the Access Hatch.

3. Remove the 2 off G4 Filters.

4. Remove the Heat Exchanger Retaining Bracket retaining screw.

5. Remove the Heat Exchanger Retaining Bracket.

6. Remove the Heat Exchanger carefully, keeping it horizontal to avoid damaging the EPP housing.

7. Remove the 4 off Terminal Cover retaining screws.

8. Remove the Terminal Cover.

9. The following procedure applies to both MVHR fans, only remove remove faulty fans from the MVHR:
a) Identify the faulty fan within the MVHR.

Note: The upper fan (A) provides the external / supply air and the lower fan (B) provides the ex­haust / outgoing air.

b) Disconnect the power and control leads of the faulty fan from the PCB (Xcell 150 QVW model only) or

Terminal Block (Xcell 150 QV model only), whichever applies. Refer to Section 7 for the relevant wiring
diagram to correctly identify which leads to disconnect for each fan.

22

c) Firmly attach string to the two leads of the faulty fan.

Note: The string, at least 3 metres long, must be secured tightly but not in a way that will become
jammed when pulled through the cable channels inside the unit i.e. no large tied knots.

d) Remove the Bell Mouth covering the faulty fan.

Note: Insert a flat bladed screwdriver into the recess on the edge of the Bell Mouth & lever it out

carefully to avoid damaging the EPP housing.
e) Remove the 3 off retaining screws of the faulty fan.
f) Push the leads of the faulty fan down into the top of the MVHR by around 30mm.

g) Remove the faulty fan (attached to the plastic Motor Mount) also pulling through the faulty fan leads

and attached string.

h) Remove the 4 off retaining screws to remove the plastic Motor Mount from the faulty fan, note the

orientation of the faulty fan and it’s leads in relation to the slots in the plastic Motor Mount.
i) Assemble the plastic Motor Mount to the new fan & secure with the 4 off retaining screws.
j) Untie the string from the faulty fan leads and attach to the new fan leads.
k) Position new fan in the MVHR, pulling through the string & fan leads to take up the slack as it‘s moved

into place. Ensuring that the plastic Motor Mount is correctly orientated and is flat against the EPP

housing.
l) Secure the new fan into place with the 3 off retaining screws.
m) Remove the string from the new fan leads.
n) Connect the power and control leads of the new fan to the PCB / Terminal Block (whichever applies).

Refer to Section 7 for the relevant wiring diagram to correctly identify where to reconnect the power /

control leads.

Note: Fan leads may be need to be cut to length.
o) Replace the Bell Mouth, push gently into the EPP housing but ensure it is clips into place.
p) Spin the blades of the new fan to ensure that it moves freely and is not obstructed in any way. If any

obstruction is present the fan has not been positioned correctly within the EPP housing. Dismantle
again to correctly fit ensuring that the plastic Motor Mount is correctly orientated and is flat against the
EPP housing.

10. Repeat step 10 for the other fan should both fans need replacing. It is recommended that only one fan is
replaced at a time.

11. Replace the Terminal Cover and secure with the 4 off fixing screws.

Note: Ensure no leads or cables are trapped underneath the Terminal Cover before securing.

12. Replace the Heat Exchanger carefully, keeping it horizontal to avoid damaging the EPP housing.

13. Replace the Heat Exchanger Retaining Bracket & retaining screw.

14. Replace the 2 off G4 Filters.

15. Replace the Access Hatch and turn clockwise to secure.

16. Switch the mains supply back on.

17. The MVHR is ready to recommence operation.

23

11 Customer Notes (to record details of filter / recuperator cleaning etc.)

24

Customer Notes (continued)

25

Customer Notes (continued)

26

Maintenance Log

Date Action Signature/ Stamp

27

This Xpelair MVHR was purchased from:

Supplier stamp

On ________________________(date)

28

GUARANTEE

Terms and Conditions for UK & ROI (outside UK & ROI contact your local distributor)

We, Applied Energy Products, guarantee this product against faulty workmanship and material defects for a period
of 5 years from the date of purchase subject to regular servicing by by Applied Energy Products Limited, or our
approved agents.

In the event of a product breakdown during the guarantee period, you should initially contact your installer, before
contacting Applied Energy Products on the Technical line number below providing that:

a) The product has been installed in a residential or light commercial environment.
b) The product has been correctly installed and commissioned in accordance with our instructions and is being

used on the supply circuit or voltage printed on the rating plate.

c) The product has been used in accordance with these instructions and has not been tampered with or otherwise

subject to misuse, neglect or accident.

d) The product has been regularly maintained in accordance with these instructions and the airway is

unobstructed.
e) The product has not been taken apart, modified or repaired except by a person authorised by us.
f) Evidence of the date of purchase in the form of an invoice or receipt will be required in order to qualify under the

terms of this guarantee.
g) For the service work to be undertaken free of charge, the work must only be undertaken by Applied Energy

Products Limited, or our approved agents.
h) Service under guarantee has no effect on the expiry date. The guarantee on any exchanged parts or product

ends when the original guarantee period ends.

i) In the event of a product being returned to Applied Energy Products Limited and not found to be faulty, the

product would be available for collection from the relevant premises within one month and if not collected it

would be disposed of or delivered by Applied Energy Products Limited and a delivery charge made.

EXCLUSIONS

This guarantee does not apply to the repair or replacement of Filters, Accessories, Isolating switches, Electrical
cable, Fuses and/or Circuit breakers or annual servicing.

This guarentee covers products supplied by Applied Energy Products only and does not cover other products and
components used to create a system that have not been purchased from Applied Energy Products.

The responsibility for the suitability of the complete system for the specific application remains the responsibility of
the original specification engineer.

This guarantee does not cover damage or defects arising from poor or incorrect installation, improper use or lack of
maintenance. It is the responsibilty of the installer to check that the installation parameters meet the requirements
of the product, and any relevant regulations.

If we are called out to a fault, which is subsequently identified as being an installation fault, we will make a charge.
It is important that the routine checks are completed before calling us out, as many issues can be simply diagnosed
and resolved.

We make no guarantees as to response times for repairs. We will endeavour to achieve the most timely response
possible but while we indicate an average response time, this should not be taken as a guarantee.

The guarantee applies to a repair or replacement (at our discretion) of the product subject to the conditions above,
and does not cover compensation for the loss of the product or consequential loss of any kind.

This guarantee does not affect your statutory rights.

Booklet 23515AA Rev. A

Applied Energy Products Limited
Morley Way
Peterborough
PE2 9JJ

Customer Care / Technical Line: 0844 372 7766
Customer Care / Technical Fax: [phone]
Sales Line: 0844 372 7750
Sales Fax [phone]
www.applied-energy.com

Xpelair is a registered trademark of Applied Energy
Products Limited.
Applied Energy Products reserve the right to alter
product specifications or appearance without prior
notice. All finishes and diagrams in this booklet are
as accurate as printing processes allow.