Vent-Axia HR300 User manual

HR300
Through the wall
Heat Recovery Ventilator
Installation and Maintenance Instructions
PLEASEREADINSTRUCTIONSINCONJUNCTIONWITH
ILLUSTRATIONS.PLEASESAVETHESEINSTRUCTIONS
Stock Ref No:-
HR300 370394

IMPORTANT SAFETY INFORMATION
PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE
COMMENCING INSTALLATION.
1. Do not install this product in areas where the following may be present or
occur:
• Excessive oil or a grease laden atmosphere.
• Corrosive or flammable gases, liquids or vapours.
• Subject to direct water spray from hoses.
• Ambient temperatures higher than 40°C and lower than -20°C.
• Possible obstructions that may hinder access to or removal of the unit.
2. All wiring must be in accordance with the current IEE wiring regulations
BS7671, or appropriate standards of your country. Installation should be
inspected and tested by a suitably qualified person after completion.
3. Ensure the mains supply (voltage, frequency and phase) complies with the
rating label.
4. The unit should be provided with a local double pole fused spur fitted with a
3A fuse having a contact separation of at least 3mm.
5. These units must be earthed.
6. Precautions must be taken to avoid the back-flow of gases into the building
from the open flue of gas or other fuel-burning appliances.
7. 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.
8. Young children should be supervised to ensure that they do not play with
the appliance.

INSTALLATION GUIDANCE
1. The installer is responsible for the installation and electrical connection of the system on
site. It is the responsibility of the installer to ensure that the equipment is safely and
securely installed and left only when mechanically and electrically safe.
2. All regulations and requirements must be strictly followed to prevent hazards to life and
property, both during and after installation, and during any subsequent servicing and
maintenance.
3. Certain applications may require the installation of sound attenuation to achieve the
sound levels required.
4. The unit must not be connected directly to a tumble drier.
5. The supply air must be drawn from the exterior of the property.
6. The exhaust grille should be located at least 600mm away from any flue outlet. The inlet
grille should be located 2000mm away from any flue outlet.
Disposal
This product should not be disposed of with household waste. Please
recycle where facilities exist. Check with your local authority for
recycling advice

Contents
Section Page
1.0 Introduction 5
2.0 Site Requirements 6
3.0 Installation 7
4.0 Electrical 9
5.0 Maintenance 10

1.0 Introduction
1.1 Description (Fig. 1)
1. The HR300 unit is a through the wall heat
recovery ventilator which is ideal for light
commercial applications including function
rooms, swimming pools, offices, classrooms etc.
2. The HR300 comes complete with an integral
shutter device, two internal rotor motors and twin
centrifugal impellers.
Bezel
Fig. 1
HR300
Panel Flange
3. The maximum power consumption for the unit
is 108w.
4. The twin impeller and heat exchanger
arrangement simultaneously supplies and
extracts air while transferring heat from the stale
exhaust airflow to the fresh intake airflow. This
provides up to 70% heat recovery from the stale
extracted air.
1.2 Ancillary Equipment
1. The HR300 unit can be used in conjunction with
a range of ancillary equipment.
Controller: A range of controllers - see section
3.1 Controllers.
HR300RF2 (370402): Replacement Filter Pack.
EXT300 (370422): Extension Sleeve. The
extension kit is for use with walls up to 650mm
thick.

2.0 Site Requirement
2.1 Information
1. The unit is designed for installation in external
walls with a thickness of between 150mm to
315mm. For wall thicknesses upto 650mm an
extension kit is available (ref: 370422).
2. If the unit is to be fitted in a replacement
window panel, a mounting kit must be used.
3. The unit must be sited and connected by a
suitably competent person and be in accordance
with current UK Building Regulations and I.E.E.
Wiring Regulations (BS 7671).
4. The unit is intended for permanent connection
to the mains electrical supply.
5. The unit is intended for fixed wiring installation.
6. Wiring to the unit in the UK must be via a
switched fused spur. The switched fused spur
must have a 3mm minimum contact gap in all
poles.
500mm Min Above
Floor Level
125mm
Min
Fig. 2
125mm
Min
7. Ensure that the mains electrical supply is
compatible with the rating label attached to the
product.
8. The unit must be sited such that the ambient
temperature will not exceed 40° C.
9. Do not site the appliance in the vicinity of
excessive levels of airborne oil or grease.
10. If the unit is installed in a room containing a
fuel burning appliance, the installer must ensure
that air replacement is adequate for both
appliances.
11. The unit must not be installed at a level below
500mm from the floor.
12. The internal grille surround must be sited at
least 125mm away from any wall or projecting
surface (Fig. 2).
13. The external grille of the unit must be sited at
least 500mm away from any flue of gas or solid
fuel appliances. This is to avoid back flow of
gases entering the room.
14. All safety regulations and requirements must
be strictly followed to prevent hazards to life and
property both during and after installation and
during subsequent maintenance or servicing.
15. Ensure the mains electrical supply is switched
off before commencing installation or
maintenance.

3.0 Installation
CG-1-1/01
3.1 Controllers
1. The HR300 unit can be installed in conjunction
with a number of controllers.
VCON6(370356): The VCON6 controller can be
used to provide Off/Low/Normal/Boost/Sensor
control. (The HS6 humidistat or TIM2 over-run
timer can be used in conjunction with the VCON6
controller to provide automatic control.
150VA (563538): The 150VA transformer,
when used with a trickle/boost switch (455213),
allows for a trickle and boost speed to be
selected. Only terminals providing 140V or
higher should be used as the unit will not
operate reliably bellow 140V.
Ecotronic 1.5A controller (W300310):
Provides variable speed control and on off and
auto (sensor) modes.
TIM2(370346): The TIM2 is an overrun timer
which can also be used to control the HR200
unit via a remote sensor e.g. Humidity Sensor.
3.2 Initial Preparation
1. Select an approved electrical control
arrangement for the HR300 unit (above).
2. After considering the site requirements
(Section 2.0), select a suitable site for the unit
and controllers and work out the cable runs.
WARNING: Before deciding on the final position
for the unit, check there are no buried cables,
pipes or obstructions on the outside wall.
Cable requirements: Suitably (Basec or Har)
approved four core cable of appropriate current
carrying capacity.
3. Install the cable runs and appropriate
controllers in conjunction with a fused connection
unit. Contact gap must not be less than 3mm.
4. Working from the inside, mark out the
position of the mounting hole - 280mm wide x
380mm high (see Fixing Template).
5. Carefully cut the holes in the inner and outer
brick courses to form a suitable aperture to
receive the unit. Ensure that this is level.
NOTE: Bricks will cut more easily and
accurately if a series of holes are drilled close
together along the marked lines.
6. Remove the grille, heat exchanger, from the
unit (Fig. 3).
Heat Exchanger
Grille
Fig.3.

3.0 Installation
Blind Grommet
280mm
380mm
3.3 Installing the Appliance
From Inside
1. Slide the unit into the mounting hole and
ensure that the minimum overhang requirements
are achieved inside and out (Fig. 4).
2. The HR300 requires an overhang internal and
external (Fig. 5):
Internal 50mm
External 55mm
Fig. 4
55mm
Internal External
3. Ensure that the unit is square and true with the
outside wall face. If firmer fixings are required,
secure the unit in place with the two fixing screws
provided.
NOTE: Ensure the fixings DO NOT inhibit
removal or replacement of the heat exchanger.
4. Make good around the case.
5. Fit the bezel on the inside to cover the making
good by pressing the bezel over the case (Fig. 6).
3° Min
CAUTION: Ensure the case does not distort
during fixing and making good.
For Drainage
50mm
Fig.5
From Outside
1. Slide the panel flange (flange first) on to the
unit and press the flange firm against the outer
wall (Fig. 6).
2. Secure the panel flange to the wall using the
fixing screws provided. If necessary the panel
flange can be secured to the case by self-tapping
screw 25mm long maximum.
Bezel
Fig. 6
Panel Flange

4.0 Electrical
4.1 Electrical Connections
230V 50Hz 108W max
1. The HR300 is supplied with an integral shutter
device.
2. Wiring must be via a 3A fused switched spur
with a 3mm contact separation in each pole. The
wiring should be suitably (Basec or Har)
approved cable of appropriate current carrying
capacity.
3. Ensure that the mains power supply is
isolated prior to installation.
4. The HR300 is supplied with a length of cable
attached from the factory. This can be extended
with the use of 4 core cable as required.
5. Connect the wires as shown in Fig.7 to a Switched
fused spur or a control unit. If a controller is used follow
the fitting and wiring instructions supplied with the
controller ensuring that the black and brown wires are
connected to the same terminal on the controller.
6. Switch on the mains electrical supply and
check the operation of the unit.
NOTE: On operation there is a delay of 30
seconds prior to the shutter opening.
Fig.7. Normal Running

HR300

5.0 Maintenance

5.1 Cleaning the Unit
1. In addition to removing odours, providing fresh
air and recovering heat, this unit extracts
airborne impurities such as dust, dirt and grease.
These gradually build up and detract from the
efficiency and appearance of the unit.
2. To ensure optimum performance, the unit
should be cleaned every 3 to 6 months or at
periods determined by the level of contamination
experienced and according to the following
procedure.
3. Isolate the mains power supply.
4. Undo the two grille securing screws and
remove the grille (Fig. 8).
5. Remove the filter from rear of grille.
6. Slide out the heat exchanger (Fig 8).
7. Wash the grille, filter and heat exchanger in
warm water using a mild detergent and dry
thoroughly.
CAUTION: Keep water away from all electrical
components and wiring within the unit.
8. If the filter cannot be cleaned, a replacement
is necessary (ref: 370402).
9. Reassemble in reverse order ensuring the
filter and heat exchanger are seated correctly.
10. Switch power supply on and check the
operation of the unit
5.2 Summer Operation
During summer the heat exchanger can be
replaced with the provided divider board.
The unit will then provide positive cooling
to the room. Remove the heat exchanger
as described in section 5.1. Slide the
divider board in its place and replace grille
securing it with the two screws.
Fig. 8

The unit is supplied with four, 6-month Timestrip indicators. A Timestrip is a single use self-adhesive label that once
activated will turn red over 6 months. It should be used to keep track of when the filter and cell need cleaning/replacement.
Using the self-adhesive backing the strip can stuck near the units controls, or in a easily visible place.
A normal cleaning schedule for a unit would be as follows:
After installation Activate the 1st Timestrip
After 6 months Clean cell, clean filter, activate 2nd Timestrip
After 12 months Clean cell, clean filter, activate 3rd Timestrip
After 18 months Clean cell, clean filter, activate 4th Timestrip
After 24 months Clean cell, replace filters, the new filters will be supplied with 4 additional Timestrip indicators
Note: The above is the minimum requirement; more frequent cleaning intervals may be needed depending on the
environment the unit is installed in.
Activating the Timestrip.
1. Activation: Fully squeeze the activation button between thumb and finger. A red line will appear within 1-2 minutes to
show that the Timestrip has been activated.
2. Peel off the backing liner and stick the Timestrip to the Unit or near the controls of the unit. The location should make it
obvious to the person responsible for maintenance that the unit needs attention.
3. Once activated, the red dye will indicate elapsed time by moving through the white window and past each time marker.
The progress of the red dye is irreversible and each Timestrip can only be used once.









PRODUCTFICHE
ForResidentialVentilationUnits(ComplyingCommissionDelegatedRegulation(EUNo1254/2014)
Name: Vent‐Axia Vent‐Axia
ModelID(StockRef.):HR300–370394CDCHR300–370394LDC
SECClassBA
SECValue('Average')‐33.67‐38.24
SECValue('Warm')‐12.17‐15.59
SECValue('Cold')‐71.99‐78.57
LabelRequired?(Yes/No=Outofscope)YesYes
Declaredas:RVUorNRVU/UVUorBVURVU/BVURVU/BVU
SpeedDriveVariableSpeedVariableSpeed
TypeHRS(Recuperative,Regenerative,None)Recuperative Recuperative
ThermalEff:[(%),NA(ifnone)]70.0070.00
Max.FlowRate(m3/h)298.80298.80
Max.PowerInput(W):(@Max.FlowRate)108.00108.00
LWA:SoundPowerLevel(dB)57.5257.52
Ref.FlowRate(m3/s)0.060.06
Ref.PressureDiff.(Pa)75.0075.00
SPI[W/(m3/h)]0.240.24
ControlFactor&ControlTypology:(CTRL/
Typology) 
ControlFactor;CTRL0.850.65
ControlTypologyCentralDemandControlLocalDemandControl
Declared:‐MaxInternal&ExternalLeakage
Rates(%)forBVUsorcarryover(forregenerative
heatexchangersonly),
‐&Ext.LeakageRates(%)forDuctedUVUs;
<5%Internal,<5%External<5%Internal,<5%External
MixingRateofNon‐DuctedBVUsnotintendedto
beequippedwithoneductconnectiononeither
supplyorextractairside;
TBCTBC
Positionanddescriptionofvisualfilterwarning
forRVUsintendedforusewithfilters,including
textpointingouttheimportanceofregularfilter
changesforperformanceandenergyefficiency
oftheunit
N/AN/A
ForUVUs(InstructionsInstallRegulated
Supply/ExtractGrillesFaçade)N/AN/A
InternetAddress(forDisassemblyInstructions)www.vent‐axia.comwww.vent‐axia.com
Sensitivityp.Variation@+20/‐20Pa:(forNon‐
DuctedVUs)TBCTBC
AirTightness‐ID/OD‐(m3/h)(forNon‐Ducted
VUs)TBCTBC
AnnualElectricityConsumption:AEC(kWh/a)2.831.84
AnnualHeatingSaved:AHS(kWh/a) 
AHS:Average42.1742.17
AHS:Warm19.0719.07
AHS:Cold82.5082.50



Notes:-

Notes:-

The Guarantee
Applicable only to products installed and used in the United Kingdom. For details of guarantee outside the
United Kingdom contact your local supplier.
Vent-Axia guarantees its products for two years from date of purchase against faulty material or
workmanship. In the event of any part being found to be defective, the product will be repaired, or at the
Company’s option replaced, without charge, provided that the product:-
Has been installed and used in accordance with the instructions given with each unit.
Has not been connected to an unsuitable electricity supply. (The correct electricity supply voltage
is shown on the product rating label attached to the unit).
Has not been subjected to misuse, neglect or damage.
Has not been modified or repaired by any person not authorised by the company.

IFCLAIMINGUNDERTERMSOFGUARANTEE
Pleasereturnthecompleteproduct,carriagepaidtoyouroriginalsupplierornearestVent‐AxiaCentre,bypostor
personalvisit.Pleaseensurethatitisadequatelypackedandaccompaniedbyaletterclearlymarked“Guarantee
Claim”statingthenatureofthefaultandprovidingevidenceofdateandsourceofpurchase.
Theguaranteeisofferedtoyouasanextrabenefit,anddoesnoteffectyourlegalrights
Head Office: Fleming Way, Crawley, West Sussex, RH10 9YX.
UK NATIONAL CALL CENTRE, Newton Road, Crawley, West Sussex, RH10 9JA
SALES ENQUIRIES: Tel: [phone] Fax: [phone]
TECHNICAL SUPPORT: Tel: [phone] Fax: [phone]
370676 F 0818
