BrookVent aircycle 4.1 User manual

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in Heat Recovery Ventilation
Installation, maintenance & user manual
Applicable to the following aircycle 4.1 models:
PR DUCT C DE DESCRIPTI N
AS 90-0401-WDS-01 aircycle 4.1 c/w Integral Humidistat & Summer Bypass - Wall Mount
AS 90-0401-WDS-01V aircycle 4.1 c/w Integral Humidistat & Summer Bypass - Wall Mount Inverted
AS 90-0401-FDS-01 aircycle 4.1 c/w Integral Humidistat & Summer Bypass - Floor Mount
AS 90-0401-FDS-01V aircycle 4.1 c/w Integral Humidistat & Summer Bypass - Floor Mount Inverted
PERF RMANCE
UNRIVALLED

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C NTENTS
PLEASE KEEP THESE INSTRUCTI NS WITH THE PR DUCT.
Please read this manual fully prior to installing the MVHR unit.
1.0 Introduction ................................................................................................................................ 2
2.0 Safety .......................................................................................................................................... 3
3.0 Specifications/ Dimensions (mm) ...............................................................................................
4.0 Installation ................................................................................................................................ 10
.0 Electrical Connections/ Wiring ................................................................................................. 19
6.0 Controls and Settings ................................................................................................................ 21
7.0 Maintenance ............................................................................................................................. 38
8.0 User Operation .......................................................................................................................... 44
9.0 Trouble Shooting ....................................................................................................................... 46
10.0 Customer Support ..................................................................................................................... 47

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IMPORTANT
This appliance is not intended for use by persons (including children) 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.
1.0 Introduction
The Brookvent aircycle 4.1 is a highly efficient Mechanical Heat Recovery Ventilation
(HRV/MHRV) system, specifically designed for medium to large dwellings and apartments.
The system should be run continuously 24 hours a day and should only be disconnected
by a competent person during service or maintenance.
Heat Recovery ventilation works best in new homes, which are extremely airtight and
have high efficiency ratings. These dwellings require a high level of fresh air to ensure a
healthy living environment.
The system works by drawing stale air from ‘wet rooms’ such as Bathrooms, WC’s and
Kitchens, recovering up to 94% of the heat from this air using a highly efficient heat
exchanger, before expelling waste air from the home. Simultaneously, fresh air is drawn
into the home, filtered, and warmed by the recovered heat and is supplied into the
‘habitable rooms’ such as bedrooms, dining rooms and living rooms.
1.1 Model Variations
This installation manual refers to the Brookvent aircycle 4.1 and pertains to the
following models:
PR DUCT C DE DESCRIPTI N
AS 90-0401-WINS-01 aircycle 4.1 c/w Integral Humidistat - Wall Mount
AS 90-0401-FINS-01 aircycle 4.1 c/w Integral Humidistat - Floor Mount
AS 90-0401-WDS-01 aircycle 4.1 c/w Integral Humidistat - Wall Mount
AS 90-0401-FDS-01 aircycle 4.1 c/w Integral Humidistat - Floor Mount

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1.2 Product Guarantee
This product is guaranteed against defects for a period of 5 years from date of purchase
with the first year covering parts and labour and the remaining 4 years covering parts
only.
In the instance of a defect, Brookvent may repair the product, replace the product free of
charge or refund the cost of the product at Brookvent’s own discretion. In terms of
installation, operation and maintenance please follow all instructions provided. If this
product has been misused, not properly installed, not properly maintained, or handled
carelessly it may lead to this guarantee being declared void.
Brookvent does not accept liability for damage caused by non-observance of the
installation instructions. Service activities must be carried out by Brookvent or by
competent installers using original Brookvent parts. This guarantee does not affect your
statutory right as a consumer.
Brookvent operate a policy of continuous innovation and improvement and thus
reserve the right to alter product specifications and appearances without notice.
2.0 Safety
The following information must be read carefully to ensure safe installation and
operation of the Brookvent HRV system.
2.1 General Safety
 Do not use this appliance for functions other than those described in this booklet.
 Never touch the appliance with wet hands.
 The unit is only suitable for 230 VAC/50Hz electric mains.
 Never modify the fan or electronics, all repairs must be conducted by Brookvent.
 Never connect the power if electronics cover is not fitted.
 Do not store flammable products in close proximity to the unit.
 If cleaning/ dusting the external surface, do so with a dry cloth only.
 Isolate power before removing any panels/covers (excluding filters).
 Never remove the heat recovery core while the fans are running. NB. It can take
some time for the fans to come to a stop once power has been isolated.

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2.2 Responsibility of the Installer
 Correct Installation, balancing and commissioning of the MHRV unit as per the
requirements of this document.
 Record measured air flow volumes on each of the valves at high and low rate.
 Compliance to requirements and local additional rules.
 Explanation of the ventilation system to the user.
 Warning for the user, to check or replace the air filters on time.
 All the above, as set out in the latest edition of the Domestic Ventilation
Compliance Guide and the SAP Appendix Q – Installation Guide and Checklist
specific to the UK market.
2.3 Responsibility of the ccupant
 Replacement of the filters as per the recommended/ required interval.
 Cleaning the valves in the rooms regularly to prevent blockage.
 To ensure that the system is functioning properly on a regular basis
 To use manual boost switches (where provided) to prevent build-up of pollutants
or mould growth.
IMPORTANT
Dirty or clogged filters may cause inadequate ventilation in the home which may lead to
air quality issues. It is important that the filters are changed at least once per year or as
required.
In new build properties it may be prudent to check/ change your filters after the first 3
months of occupancy depending on the amount of residual ‘building dust’ present
within the property. Failure to do so will affect your warranty.
Filters can be purchased directly online from brookvent.co.uk

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3.0 Specifications/ Dimensions (mm)
FRONT SIDE
TOP

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3.1 Duct Connections

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3.2 Detailed Specification
Weight: 29kg
Materials:
• Main enclosure: High density, impact resistant EPP (Expanded Polypropylene)
• PCB & control panel enclosure: ABS FR
• Drainage tray: PP
• Filters: Polyester media (G3)
• Filter cover: Rubber
• Mounting Bracket: Zinc Plated Steel
• Fan Scrolls: ABS
Electrical:
• 230v EC Low energy, backward curved centrifugal fans
• PCB c/w digital controls
• Supplied complete with 4 core flying lead: (Live: Brown), (Neutral: Black),
(Earth: Yellow & Green), (230v Switched Live (Boost): Grey)
• Plug and play components for easy maintenance
Installation: Wall or Floor Mount
Standards:
Fully complies with Building Regulations for UK & Ireland
SAP Appendix Q Listed | Energy Savings Trust Best Practice | CE
Guarantee Period: 5 Years

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3.3 SAP Appendix Q Results
SAP 2005 (See SAP - PCDB for further details) http://www.ncm-pcdb.org.uk/sap/
SAP 2012 (See SAP - PCDB for further details) http://www.ncm-pcdb.org.uk/sap/
Exhaust Terminal
Configuration
Airflow Rate
(l/s)
100% Variable
Specific Fan
Power
(W/l/s)
Heat Exchange
Efficiency (%)
Energy Savings
Trust Best
Practice
Compliance
Kitchen + 1 Wet
Room 15 0.48 94 YES
Kitchen + 2 Wet
Room 21 0.42 93 YES
Kitchen + 3 Wet
Room 27 0.41 92 YES
Kitchen + 4 Wet
Room 33 0.45 91 YES
Kitchen + 5 Wet
Room 39 0.49 90 YES
Kitchen + 6 Wet
Room 45 0.56 90 YES
Kitchen + 7 Wet
Room 51 0.65 89 YES
Exhaust Terminal
Configuration
Airflow Rate
(l/s)
100% Variable
Specific Fan
Power
(W/l/s)
Heat Exchange
Efficiency (%)
Energy Savings
Trust Best
Practice
Compliance
Kitchen + 1 Wet
Room 21 0.45 93 YES
Kitchen + 2 Wet
Room 29 0.45 92 YES
Kitchen + 3 Wet
Room 37 0.49 91 YES
Kitchen + 4 Wet
Room 45 0.58 90 YES
Kitchen + 5 Wet
Room 53 0.67 88 YES
Kitchen + 6 Wet
Room 61 0.83 87 YES
Kitchen + 7 Wet
Room 69 0.99 86 YES

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3.4 Airflow: Pressure/ Performance Curve
3.5 Acoustic Performance
0
100
200
300
400
00
600
700
0 20 40 60 80 100 120 140 160 180
Pressure Pa
Flow l/s
Pressure Vs Flow

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3.6 Acoustic Performance (Incl. Indicative pressure)
4.0 Installation
It is important that the full installation of this system is carried out by competent persons,
including all electrical works and connections being completed by a qualified electrician.
The MVHR unit is designed to be installed indoors, within an attic, storage cupboard, or
void space, away from exposure to frost, water, or intense heat. The system should be
installed in a ventilated space.
A clear access space is required around the unit; this will ensure ease of installation
relating to ductwork, wiring, and the connection of the condensate drain. It is important
that filters to the system can also easily be accessed for replacement.
4.1 Mounting
The aircycle 4.1 is designed to be either wall or floor mounted. Please ensure that this
method of fixing is suitable for the mounting surface and that it can safely bear the
load.

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4.1.1 Wall Mount
The unit should be attached the to the wall as shown using the wall bracket provided,
please ensure the mounting surface can safely bear the load of the unit using suitable
screw fixings.
ne bracket will be secured to the back of the unit as shown in Fig. 1, the second bracket
should be secured to the mounting surface as shown in Fig. 2. Please ensure the brackets
are level. The unit can then be set onto the mounting surface with the lip of each bracket
intersecting as shown in Fig. 3.
Ensure the system is level when fully mounted.
Fig. 1
Fig. 2
Fig. 3

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4.1.2 Floor Mount
The unit should be mounted on the Floor, on a stable, level surface. Ensure the
condensate connection at the bottom of the unit can be fitted to allow a minimum 5
degree fall to the internal drainage point.
Waterless Dry
Trap (Not Incl.)

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4.2 Ductwork and Connections
To comply with SAP Appendix Q, and to facilitate the air flow performance, all ducting
used should be rigid. If flexible ducting is required, it should be kept to a minimum
(maximum length: 300mm) and kept taut as per the Domestic Compliance Guide (Part F:
England and Wales 2010
The spigots on the Brookvent aircycle 4.1 systems are suitable for connection to 150mm
diameter round pipe.
The label on top of the unit clearly identifies which spigot should be connected to which
ducting route within the dwelling. This is also shown clearly within this manual.
The aircycle 4.1 MVHR system can be inverted on-site, changing the external duct
connections from the right to the left of the system as required for specific property types
thus minimising ducting runs, system pressure and installation time. Please ensure to
follow the inversion steps provided in this manual carefully (see page. 16).
For optimum efficiency and performance, it is recommended that 150mm diameter
round pipe is used (where possible) to connect to the spigots and continue throughout
the dwelling, this will assist in keeping pressure losses to a minimum. A minimum straight
vertical run of 750mm should also be used directly off each spigot (where possible) based
on CISBE guidance.
Where it is not possible to continue throughout the dwelling in rigid 150mm diameter
round pipe due to the void spaces available, a conversion to rigid 220mm x 90mm flat
rectangular ducting is recommended. Reducing further to 125mm diameter round pipe
and/or 204mm x 60 flat rectangular ducting is possible when airflow rates have reduced
sufficiently.
Connection to semi-rigid ducting via an appropriate air manifold system is also a suitable
option.
It is recommended that the number of bends in the ducting system is kept to a minimum.
Each of the external roof terminals / wall terminals must be the equivalent to the open
area of 150mm diameter ducting. Brookvent recommend the use of terminals with low
pressure resistance.
To facilitate air circulation within the dwelling there must be a minimum of 10mm
undercut on each of the doors (to the finished floor) within the dwelling (or grills placed
at low level on the doors).
Extract air valves should be placed in all wet rooms (kitchen, utility, en-suite, etc.) and
should be sited, where possible, close to the main source of humidity/ pollutant.

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Fresh supply air valves should be placed in all habitable rooms (bedroom, living room,
dining room, etc.).
Air valves should be locked upon commissioning so that they are tamper proof.
Duct designs/ layouts should always be adhered to if provided.
The Domestic Compliance Guide: Eng. and Wales 2010 or relevant equivalent dependent
upon local guidelines, should be adhered to in terms of installation practices.

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4.3 Connection of Condensate Drain
MVHR systems generate considerable amounts of moisture due to their high Heat
Recovery Efficiency; this moisture must be drained from the system to a suitable
discharge location.
The aircycle 4.1 is supplied complete with a centralised drainage connection on the
bottom of the unit.
Brookvent recommend the use of a 32mm “Waterless Dry Trap” on HRV systems (as
shown above) to prevent the back flow of air into the HRV unit from the waste discharge
system.
It is imperative that there is a gravitational fall from the unit to the discharge point
ensuring that the water drains from the unit. A minimum fall of 5 Degrees should be
ensured throughout. Drainage piping/ connections should be insulated if located in cold
roof spaces.
Drainage piping/ connections should be insulated if located in cold roof spaces.
D N T connect other condensate pipes from the system or other systems BEF RE the
“Waterless Dry Trap.
Waterless Dry
Trap (Not Incl.)

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4.4 Inverting the unit
The aircycle 4.1 can be inverted, changing the external duct connections from the right to the left of
the system as required for specific property types, where required.
Inverted Front
Standard Front
A: Filter Cassette
B: PCB Module
C: M10mm x 2 mm Washer
D: M10mm x 16mm Screw
E: Wall Mount Plate
F: Blank Cable Panel

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Step 1. Isolate the unit from the mains and ensure all supply circuits are disconnected.
Step 2. Disconnect the mains from the fused spur.
Step 2. Unscrew the two large screws in the front of the control panel and pull out the PCB module (B).
Step 3. Unplug all the leads, the connectors are all marked to match up with their corresponding internal connections.
Step 4. Pull the mains cable through the unit.
Step 5. Remove the filters (A).
Step 6. At the face of the unit marked INVERTED; unscrew and remove the blank control panel (F).
Step 6. At the face of the unit marked INVERTED; unscrew and remove the wall mount bracket (E).
Step 7. Pull the fan cables and sensor cables through the unit and connect the leads to their colour coded lead on the
PCB module (B).
Step 8. Push the PCB module (B) into the case and secure using the M10 screws (D) and washers (C).
Step 9. Place the filters (A) back into the unit from the face of the unit marked INVERTED.
Step 10. n the face of the unit marked STANDARD; fit the wall mounting bracket (E), even if it is a floor mounted unit.
Take care to not over tighten the bracket.
Step 11. n the face of the unit marked STANDARD; pull the mains cable through the unit and feed it through the blank
control panel (F).
Step 12. Secure the blank control panel using the M10 screws (D) and washers (C).
Note to invert the unit on site the RJ45 connect will need to be cut off the cable for the display. This will need to be
replaced if connecting via a RJ45 socket after the inversion process has been completed. (See section 5.1)

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4.5 Changing from top spigot to side spigot
Step 1. Isolate the unit from the mains and ensure all supply circuits are disconnected.
Step 2. Unscrew any duct connectors from the top that are required to be ducted from the side.
Step 3. Unscrew and remove the side plugs where they are required to be ducted from the side.
The side plugs can be discarded but the screws are still required.
Step 4. Screw the duct connectors that were removed from the top to the side of the unit were
the side plugs used to be. Ensure that the screw holes line up to the inserts.
Step 5. With the duct connectors now fitted to the side of the unit the top plugs need to be fitted
to the top of the unit. There will be 4 of these in each box.
Step 6. n each side of the top plug there is a ring, the ring on each side is a different diameter
to the other. The larger diameter fits in the centre holes and the smaller diameter fits in the
corner holes on the top of the unit.
Step 6. With the plug in the correct orientation, line up the screw holes with the screw inserts
and push the plug into the hole (it should be a snug fit).
Step 7. Screw the top plug in place.
Step 8. The unit can be connected from the side with 1 to all 4 connections
Side Plugs
Duct connectors
Top
Plugs

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5.0 Electrical Connections/ Wiring
IMPORTANT
All the electrical connections must be carried out by a qualified electrician. Installations
and wiring must conform to current IEE regulations (UK), local or appropriate
regulations (applying to other countries).
Electrical Details:
Voltage: 230 V AC ~
Fuse rating: 3 A
Warning: This unit must be earthed.
Please Note: The core cable from the mains power supply must be connected to a fixed
wiring installation, via a 3 amp fused isolator, as to comply with current IEE wiring
regulations.
A switch or circuit breaker must be used in the power supply circuit. It should be in close
proximity to the HRV unit and should be clearly marked as the disconnecting device for
the HRV Unit.
Connecting to mains:
The aircycle 4.1 unit comes pre-wired with 2m length of 4-core cable, which should be
connected into a fan-isolation switch. In turn a 3-core mains cable should be used to
connect to a 3A fused spur, which should be located close to the unit. The unit should
never be connected to a plug outlet.
Green/Yellow = Earth
Brown = Live
Black = Neutral
Grey = Switch
The grey switch wire is used to boost the system. When a live 230v signal is applied, the
Auto Boost function will be triggered.