Xpelair Xcell Stratum S120Q User manual

Installation and user manual
Xcell Stratum S120Q
Mechanical Ventilation Unit with Heat Recovery
Please ensure these instructions are kept safe and accessible at all times

2
Table of Contents
1General Information....................................................................................................................3
2Components and Construction..................................................................................................3
3Regulations and Safety Instructions .........................................................................................3
4Application and Planning...........................................................................................................4
4.1 Application.................................................................................................................................................4
4.2 MVHR operation overview.........................................................................................................................4
4.3 MVHR installation planning.......................................................................................................................4
5Installation...................................................................................................................................5
5.1 General information...................................................................................................................................5
5.2 Ceiling mounting the MVHR......................................................................................................................5
5.3 Ducting ......................................................................................................................................................6
5.3.1 Duct connections....................................................................................................................................6
5.4Condensate drain......................................................................................................................................7
5.5Typical installation example ......................................................................................................................7
5.6Installation dimensions..............................................................................................................................8
6Technical Data.............................................................................................................................8
6.1 Technical data...........................................................................................................................................8
6.2 Accessories...............................................................................................................................................8
6.3 Replacement filters:...................................................................................................................................9
7Electrical Wiring Diagram...........................................................................................................9
7a. Electric wiring 2 way switch .....................................................................................................................9
7b. Electric wiring to a West controller......................................................................................................... 10
7.1 Set up procedure.................................................................................................................................... 10
8Automatic Defrost Protection ....................................................................................................0
9Pre Heater Accessory...............................................................................................................11
10 Maintenance..............................................................................................................................11
10.1 Filters...................................................................................................................................................... 11
10.1.1 Removing and re-fitting the filters.......................................................................................................... 11
11 Air filter accessory....................................................................................................................11
12 Cleaning the Recuperator.........................................................................................................11
13 Troubleshooting .......................................................................................................................13
13a. Fault locating table ................................................................................................................................. 12
14 Installation of Replacement Fans............................................................................................14
15 Supplier Details ........................................................................................................................15
16 Maintenance Log......................................................................................................................15
17 Guarantee..................................................................................................................................15

1 General Information
Read all these instructions and warnings fully
before commencing installation.
These installation and operating instructions must
be observed during installation, operation, service
and maintenance. This MVHR unit should only be
installed and repaired by a qualified technician.
Improper repairs may expose users to danger.
Current regulation requires that installation and
operating instructions are accessible at all times
and must be handed to the technician for reference
whenever work is being undertaken. If you move,
please pass the instructions on to the next tenant/
owner. Unpack the MVHR carefully and check for
any visible signs of damage. If any damage is found
contact the 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 Construction
The MVHR comprises of the following components:
Case EPP 30mm B1 material
Ducting spigots: Ø125mm
Summer Bypass: Fixed temperature
Winter Defrost: Fixed temperature
Filters: F5 Pleated panel type in frame
F5 Filters fitted as standard
.
Access covers: EPP 30mm B1 material
Recuperator: The heat exchanger is made from
fully recyclable PS plastic.
The heat exchanger integrated into the MVHR unit
operates on the counter flow principle.
Fans: Ultra EC Fans
3 Regulations and Safety Instructions
Stratum MVHR is 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 unit.
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 (for 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 40ºC.
If the MVHR unit 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 maintenance instructions for periodic cleaning
of the air inlet/outlet valves and grilles and changing
of filters, must be strictly observed.
Connection to 220-240V AC power supply required.
The following applications/installations are
prohibited:
Where excessive fat-contaminated exhaust air,
extracting explosive gases, extracting particle-
contaminated air, extracting adhesive particu-
late matter are present.
Installing the MVHR unit outdoors
Connecting extractor hoods in to the MVHR
ventilation system
Servicing of the MVHR unit may only be carried out
by a qualified service technician. Contact details for
authorised servicing by a Redring Xpelair approved
technician can be found on the back of this booklet.
3

4
4 Application and Planning
4.1 Application
This MVHR unit 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 unit assumes
no liability for this.
4.2 MVHR operation overview
Using two fans in separate ducts, the MVHR
draws in external air from the outside and
exhaust air from odour-contaminated and
moisture-laden rooms (kitchen, bathroom, WC)
in the house.
Both of these air flows are passed through filters
to a cross counter flow recuperator. 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 (accessories), the heated external air is
distributed into the house and the cooled
exhaust air is ducted out of the building.
4.3 MVHR installation planning
MVHR system designs must comply with the
current standards, good practice guidelines
and 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: Dwelling houses
Approved Document B (Fire Safety) -
Volume 2: Buildings other than dwelling
houses
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 Installation
5.1 General information
The MVHR unit should be mounted slightly tilted from the horizontal to ensure effective condensate drain-
age.
If mounting on plaster board use the following fixing method:
Use 15 mm nominal plywood backing board to connect directly to the internal ceiling studwork 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 unit may only be installed in dry, non-explosion proof rooms (protection category IPX2).
The ambient temperature must not exceed +40°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 unit.
The following must also be met:
Access is required for maintenance work (e.g. changing the filter)
The condensate drain must be connected 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 Ceiling mounting the MVHR
A spacer bar is provided which is placed between the unit and the fixing surface to provide a fall to
the condensate drain outlet
There are to fixing methods provided for direct bolting or treaded down rods.
Mark out the fixing holes mounting brackets using the diagram shown in section 5.3.1 and drill the holes
to suit the fixing bolts or anchors to be used
Fix the unit using suitable locking bolts and washers
5

6
5.3 Ducting
Flexible ducting should only be used for final connections with special care taken to avoid restrictions and
other conditions which will restrict air flow. When installing ducting, care should be taken to ensure it is
properly supported and secure with joints properly sealed. 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.
If the air inlet from outside is less than 2 meters a frost protect pre-heater is recommended.
All ducting fitted to the spigots on the MVHR
should be secured via a suitable sealed duct
connector to prevent air leakage (e.g. Xpelair
CPC125 –91485AA)
Duct spigots
5.3.1 Duct connections
For ease of installation the duct connections are located at the ends of the MVHR when viewed with the
condensate drains on left hand side:
Top left with Filter: Drawing in fresh air from the outside (Atmosphere Intake)
Top right with Filter :Extracting used air from the building (Dwelling Extract)
Bottom left: Extracting the used air out to atmosphere (Atmosphere Discharge)
Bottom right: Supplying the tempered fresh air into the building (Dwelling Supply)

5.4 Condensate drain
Ensure that the spacer bar provided is fitted
between the unit and the fixing surface to
provide a fall to the condensate drain outlet
A condensate drain must be fitted to run to the
building waste water system in accordance with
the Building Regulation H1.
There are two condensate outlets. Both have caps
fitted - remove the cap from the lower outlet.
The condensate drain tube is then connected to the
outlet on the end of the unit. The condensate drain
tube can be adapted to the installation requirement.
It is important that the condensate drain tube at the
unit is positioned higher than the water surface of
the water trap and that the condensate 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 (Ø20mm and 1.0m long) is supplied.
The water trap must be purchased separately from
a local plumbing stockist.
5.5 Typical installation example
1. Exhaust air from the Wet rooms
kitchen / bathroom / toilet
2. Supply air into the building via
living rooms/ bedrooms
3. Exhaust air (from inside to outside)
4. External air (fresh air)
Heat is transferred from stale warm extracted air
to warm the incoming cool fresh air saving energy.
1.Stratum MVHR ventilation unit
2.Condensate hose (inclined)
3.Siphon with dry running protection preventing
air filtration
4.Funnel receiving water from the outlet
5.Siphon preventing infiltration of sewer gases
6. Drainage pipe (inclined)
NOTE: Water trap must be prefilled with water after
completion.
NOTE: Ensure that the condensation hose is suffi-
ciently inclined. Incorrect installation can cause
water damage.
NOTE: The condensate hose must be checked and
cleaned regularly, at least annually.
.
7

8
5.6 Installation dimensions:
6. Technical Data
6.1 Technical data:
Technical Data
Units
Specification
Voltage / Frequency
V / Hz
~ 220-240V / 50-60 Hz
Max. current consumption
A
0.86
Power consumption - Speeds 1, 2
W
17 -65 Max110
Air flow rate –min - max
m³/h
Min 30 - 120
Max external Static Pressure
Pa
120
Protection category
IP
X2
ambient temperature
°C
-20 to +40
Dimensions (without ducting) - W x H x D
mm
550 x 240 x 510
Weight of MVHR
Kg
10
Duct connections
mm
125 4xDN125
Condensate drain tube connections
mm
20
Filter class
-
F5
Efficiency of Recuperator
%
88
Weight
Kg
11
6.2 Accessories:
Description
Part
Number
Notes
Air Filter Box
45014AA
Suitable for all Xcell MVHRs.
Only one air filter box is required per MVHR.
Not supplied with filters fitted.
Class F7 Filter
95047AA
F7 Filter used in the air filter box only.
Pre Heater Unit
44001AA
Only one defrost heater unit is required per MVHR.

6.3 Replacement filters:
Description
Part Number
Replacement filters (set of 2)
40552AA
7. Electrical Wiring
7a. Electrical Wiring: (to a two way switch)
9

10
7b. Electrical Wiring: (to a West controller)
Stratum 120Q run continuously at normal or boost speed triggered by a West controller (Accessory)
Three core wiring - a common and high or low.
7.1 Set up procedure
Move jumper to Test 1 position Balance system to desired ‘normal’ extract rate using pot ‘speed 1’
Move jumper to Test 2 position Balance system to desired ‘boost’ extract rate using pot ‘speed 2’
Return jumper to ‘Normal’. The West Controller will switch between the two selected speeds.
8. Automatic Defrost Protection

11
In order to prevent the Heat Exchanger from freezing when the outside temperature is low, a frost protection monitor has been integrated
Factory setting (No user adjustment):
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.
Fan fault safety shut down
Should the supply air Fan fail the exhaust air Fan will switch off automatically.
9. Pre Heater Accessory
When the incoming air temperature drops below the set temperature
(0°C to 3°C), the Defrost Pre-Heater Unit will switch on and warm the incoming air prior to it arriving at the MVHR to pre-
vent ice forming
within Exchanger.
When the incoming air temperature rises above the set temp. (0°C to 3°C), the defrost heater unit will switch off.
10. Maintenance
10.1 Filters
The MVHR should never be operated without Filters. However, depending on the actual volume of contaminants
in the environment, the MVHR Filters need to be checked and cleaned at least twice a year and replaced at least on an annual basis. The original external / exhaust F5
quilted filters are enclosed in a frame. Contact details for purchasing new filters or servicing by Xpelair approved technicians can be found on the back of this booklet.
10.1.1 Removing and re-fitting the filters
Important: A planned filter replacement regime protects the recuperator from needing to be cleaned.
Before removing the recuperator disconnect the MVHR from the mains supply.
1. Remove filter access covers using finger grip
2. Remove the two Filters
3. Insert cleaned or new Filters. Filters can be cleaned by gently knocking together to remove dust/dirt
4. Replace the Access covers
5. The MVHR is ready to recommence operation.
11. Air Filter Box (Optional accessory)
The MVHR is fitted with F5 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 F7 Panel Filters are available as the filter elements.
The Filters fitted in the Air Filter Box should be checked for cleaning/

12
replacement at the same time as the other MVHR 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 class
G4 Filter should be installed in the intake tower.
12. Cleaning the Recuperator
The Recuperator 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 servicing by
Xpelair approved technicians can be found on the back of this
booklet. The cleaning procedure is as follows:
1. Disconnect the MVHR from the mains supply
2. Remove the top cover
3. Remove the Retaining Bracket located in front of the Heat Exchanger by removing the screw
4. Carefully pull the Recuperator outwards using the black plastic
strap around the Heat Exchanger, keeping it horizontal to avoid damaging the EPP housing
5. Thoroughly rinse the Recuperator with lukewarm water and allow all the water to drain off
6. Residual moisture will evaporate when the MVHR is operated
7. Carefully insert the cleaned Recuperator, keeping it parallel to avoid damaging the EPP housing
8. Replace the Recuperator Retaining Bracket and retaining screw
9. Switch the mains supply back on
10. The MVHR is ready to recommence operation
13. Troubleshooting
Important:
Servicing of the MVHR may only be carried out by a qualified service technician.
Contact details for servicing by Xpelair approved technicians can be found on the back of this booklet.
13a. Fault locating table
SYMPTOM
CHECK
POSSIBLE CAUSE
Fan does not work
The mains supply is on
- Mains supply interrupted
- Fuse has blown:
- Mains supply fuse or supply cord plug fuse
- Supply air Fan defective
- Exhaust air Fan defective
- Fan blade catching on inner EPP housing
- Contact fault on Fan control or power leads
- Control PCB defective
Supply air and/or exhaust
air flow rate is too low
Filters
Room air valves
Outside grilles
- Filter service period has expired
No water coming through
Condensate Drain Tube
Correct connection
Connection to dwelling Building
Waste System and not directly
outside
- No water in siphon
- Condensate water drain blocked
Noise coming from the
MVHR unit
Fans are noisy
- Increased air resistance due to contami-
nated Filters and/or Heat Exchanger
- Obstruction in the duct system

13
- Room air regulator valves not open wide
enough
Note - This table may be subject to technical amendments.

14
14. Installation of Replacement Fans
Should either Fan develop a fault and need to be replaced,
contact details for servicing by Xpelair approved technicians
can be found on the back of this booklet.
The replacement procedure is as follows:
1. Disconnect the MVHR from the mains supply
2. Remove the two Filters
3. Remove the cover screws and remove the cover
4. Remove the recuperator retaining screw and bracket
5. Remove the Recuperator carefully, keeping it parallel to avoid damaging the EPP housing
6. The following procedure applies to both MVHR fans, only remove faulty fans from the
MVHR:
a) Identify the faulty fan within the MVHR
b) Disconnect the power and control leads of the faulty fan from the PCB or Terminal Block
(Refer to Section 7 for the relevant wiring diagram to correctly identify
which leads to disconnect for each fan)
c) Slide out the EPP fan scroll support assembly and separate the fan scroll casing
d) Remove the three retaining screws, attached to the plastic motor mount and remove the faulty fan also pulling through the faulty fan leads
e) Remove the four retaining screws to remove the plastic Motor Mount from the faulty fan, noting the orientation of the faulty fan and it’s leads in relation
to the slots in the plastic motor mount
f) Assemble the plastic motor mount to the new fan and secure with the four retaining screws
g) Secure the new fan into place with the three retaining screws
h) Connect the power and control leads of the new fan to the PCB/Terminal Block (whichever applies)
i) Refer to Section 7 for the relevant wiring diagram to correctly identify where to reconnect the power/ control leads
j) Spin the blades of the new fan to ensure that it moves freely and is not obstructed. If any obstruction is present the fan has not been positioned correctly with-
in the EPP housing
k) Repeat this for the other fan, if both fans need replacing. We recommend only one fan is replaced at a time
l) Replace the Recuperator carefully, keeping it parallel to avoid damaging the EPP housing
m) Replace the Recuperator Retaining Bracket and retaining screw
n) Replace the Cover
o) Replace the two Filters and filter covers
p) Switch the mains supply on
q) The MVHR is ready to recommence operation
This Xpelair MVHR was purchased from:
Supplier stamp
On __________________________(date)
Maintenance Log
Date
Action
Signature/ Stamp

15
GUARANTEE
Terms and Conditions for UK & ROI (outside UK & ROI contact your local distributor)
Redring Xpelair Group guarantee this product against faulty workmanship and material defects for a period of two years (motors only for five years) from the date of
purchase subject to regular servicing by Redring Xpelair Group, or their approved agents.
In the event of a product breakdown during the guarantee period, initially contact your installer.
The guarantee is valid provided:
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 the instructions and is 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 been modified, subjected 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 Redring Xpelair.
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 Redring Xpelair or their 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 Redring Xpelair and not found to be faulty, the product will be available for collection from the relevant premises for one
month and if not collected will be disposed of or delivered by Redring Xpelair for 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 Redring Xpelair only and does not cover other products and components used to create a system from elsewhere- in particular
the West controller.
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.
Site visits to a fault, which are subsequently identified as being an installation fault, a chargeable. It is important that the routine checks are completed before requesting a
call out, as many issues can be simply diagnosed and resolved.
In the event of a site visit, 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 Redring Xpelair‘s 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
A3:Booklet 25032AA Rev. A
Newcombe House
Newcombe Way
Orton Southgate
Peterborough PE2 6SE
Customer Care / Technical Line: 0844 372 7766
Customer Care / Technical Fax: [phone]
Sales Tel: [phone]
Sales Fax: [phone]
www.redringxpelair.com
Xpelair is a registered trademark of the Redring Xpelair Group Ltd.
Redring Xpelair Group, 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.