Vent-Axia Lo-Carbon Tempra SELV P Assembly instructions

DRAFT
Stock Ref. N°
444368 Pullcord. (P)
403833 Pullcord Long cell (LP)
444369 Timer. (T)
403835 Timer Long cell (LT)
444370 Humidistat -Timer
Pullcord. (HTP)
403837 Humidistat -Timer
Pullcord Long cell. (LHTP)
PLEASE READ INSTRUCTIONS IN CONJUNCTION WITH ILLUSTRATIONS.
PLEASE SAVE THESE INSTRUCTIONS.
Lo-Carbon SELV
Tempra
IPX4
THROUGH THE WALL
HEAT RECOVERY FAN
Installation and Wiring Instructions
220-240V~50Hz SELV

Installation and Wiring Instructions for the Tempra SELV Range of Heat Recovery Fans.
IMPORTANT:
READ THESE INSTRUCTIONS
BEFORE COMMENCING THE
INSTALLATION
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.
• Ambient temperatures higher than 40°C or less than – 5°C.
• Possible obstructions which would hinder the access or removal of the Fan.
SAFETY AND GUIDANCE NOTES
A. All wiring to be in accordance with the current I.E.E. Regulations, or the appropriate standards of
your country and MUST be installed by a suitably qualified person.
B. The Fan should be provided with a local isolator switch capable of disconnecting all poles, having a
contact separation of at least 3mm.
C. Ensure that the mains supply (Voltage, Frequency, and Phase) complies with the rating label.
D. The electrical supply to this fan is 24v DC SELV from the transformer/controller. This means the fan
may be installed within reach of a person using a fixed bath or shower, i.e. in a nearby wall.
However, the fan must not be placed where it could be submerged in water or regularly exposed to
direct water spray, e.g. from a shower head whether permanently fixed or movable.
E. ONLY CONNECT TOGETHER THE PRODUCTS FROM THE Lo-CARBON TEMPRA SELV
RANGE SINCE THE FANS ARE SPECIALLY DESIGNED TO WORK ON 24v DC AND ARE NOT
COMPATIBLE WITH OTHER VENT-AXIA CONTROLLERS. DO NOT CONNECT MORE THAN
ONE FAN TO THE CONTROLLER.
F. The controller must not be installed in a shower cubicle or enclosure. It must be away from direct
sources of water spray and out of reach of a person using a fixed bath or shower. Site away from
direct sources of heat.
G. The controller needs free air circulation and must not be covered with any insulating material such
as might be in a ceiling or roof void.
H. The Fan should only be used in conjunction with the appropriate Vent-Axia products.
I. The fan should only be used in conjunction with fixed wiring.
J. When the Fan is used to remove air from a room containing a fuel-burning appliance,
precautions must be taken to avoid back-flow of gases into the room from the open flue of
gas or other appliance. Ensure that the air replacement is adequate for both the fan and the
fuel-burning appliance.
K. The Fan should not be used where it is liable to be subject to direct water spray for prolonged
periods of time.
L. The horizontal duct should be arranged to slope slightly downwards away from the Fan.
M. This appliance is not intended for use by young children or infirm persons without supervision.
N. Young children should be supervised to ensure that they do not play with the appliance.
Disposal
This product should not be disposed of with household waste.
Please recycle where facilities exist.
Check with your local authority for recycling advice.
2

DESCRIPTION
Through the wall Mounted Heat Recovery Fan
The Vent-Axia Lo-Carbon Tempra SELV is suitable for refurbishment or new build, kitchen, bathroom, toilet or
utility applications. The unit meets the performance requirements for intermittent extract fans under the
Building Regulations Part F 2010 (table 5.1a) and also for continuous running products
Tempra SELV is available in 6 models
444368 – Tempra SELV P
403833 - Tempra SELV LP Constant trickle speed with pull cord or switch live to boost airflow.
444369 – Tempra SELV T
403835 - Tempra SELV LT Constant trickle speed with switch live to boost airflow with adjustable
5-50 min overrun timer and optional 3 minute delay on timer.
444370 – Tempra SELV HTP
403837 - Tempra SELV LHTP Constant trickle speed with pull cord or switch live to boost airflow with
adjustable 5-50 min overrun timer and optional 3 minute delay on timer or
internal humidistat adjustable 60- 90% RH.
SELV Controller
The controller can be installed surface or recess mounted using the supplied surface mounting box or a
standard mounting box. Please note that the fixing screws may have to be replaced with screws suitable for
the type of mounting box used.
A. INSTALLATION
WALL MOUNTING
Models P,T& HTP are designed for use in a wall with a maximum thickness of 318mm fitted with a
110mm Soil pipe or Wall Sleeve (Stock Ref No 445529).
Models LP,LT & LHTP are designed for use in a wall
with a maximum thickness of 460mm fitted with a
110mm Soil pipe.
1) Using the template provided mark the 4 wall fixing
positions, the hole for the wall pipe and
mains cable entry point.
2) Cut a hole through the wall and insert the soil pipe
or wall sleeve.
Slope the sleeve slightly downwards away from the
fan and cement both ends into position flush with the
wall Fig 1
3) Undo 2 fixing screws and lift off Cover Plate Fig 2 & 3.
3
Fig.1
Fig.2 Fig.3

4) Remove 2 screws and detach
Electrical Cover fig 4.
5) Lift where indicated
to engage hinges Fig 5
and open Door Fig 6.
6) Feed flexible LV cable from PSU
through one of the rear entry
points or the side entry point as
required. And then the door
Fig 7 & 8.
7) Fit Chassis to wall with 4 fixing screws carefully
aligning the hole in the back of the Tempra with
the Wall Pipe Fig 9.
4
Fig.4
Fig.5
Fig.7
Fig.9
X 4
Fig.8
Fig.6

8) Remove screws and Heat
Exchanger Retaining Clamp kit Fig 10.
(Discard polybag)
9) Insert Heat Exchanger through
Chassis and into Wall pipe Fig 11.
Note: Line up key on top of Heat Exchanger
with slot in Chassis
10) Fit Heat Exchanger Retaining
Clamp with the screws provided Fig 12.
11) Close Door and
connect 24V Supply as described in
section B – Wiring, Adjust any settings
as required see section C – Setup. Fig 13
5
Fig.10
Fig.11
Fig.12
Fig.13
Connect to
Terminal block
Ensure cable
Clamp is used
SELV PSU

12) Re fit Electrical Cover with 2 screws indicated
In Fig 14.
13) Re fit Cover Plate and tighten 2 screws Fig 15 &16.
Ensure Pull cord is engaged in Lower Slot
14) The Tempra unit is also fitted with a “manual summer setting” which allows the unit to be set to
extract only, helping to prevent a dwelling becoming too warm in hot summer conditions.
When first installed this shutter/vent should be open. Fig.16
To activate the summer setting it should be shut.
15) Make good on outside wall with the wall
Cover bezel provided, ensure the arrow on
the bezel is at the top.
Fix/seal to the wall with a suitable sealant.
Apply sealant in outer groove
on rear of bezel.
Important:- Please ensure that
you apply sufficient sealant to
hold the bezel to the wall. (If the
wall surface is not suitable for
using sealant 2 screws can be
located through the 2 bosses provided).
Note:- Do not seal the bezel to the heat exchanger, this needs to be removed for cleaning at regular
intervals.
6
Engage
Pullcord in
slot
Fig.14
Fig.15 Fig.16
Fig.17
Ensure this vent is open
when installed to activate
the heat recovery function

B. WIRING.
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED
FROM THE POWER SUPPLY DURING THE INSTALLATION / OR MAINTENANCE.
IMPORTANT
The fan should only be used in conjunction with fixed wiring.
The cross - sectional area of supply cord used should range from 1 -1.5mm2.
Cable entry can only be made from the rear of the fan.
Allow sufficient 24V flexible cable when connecting fan, to ensure hinged door opens freely.
The Controller is suitable for connection to 220-240V 50Hz supply and 24V SELV to the fan.
The fan is a class ll double insulated product and MUST NOT be earthed.
1. Select and follow the appropriate wiring diagram. (Fig. 18 or 19)
2. Check all connections have been made correctly and ensure all terminal connections and
cable clamps are securely fastened.
7
Fig 18
Continuous trickle (6l/s or 9l/s) with pullcord boost facility SELV P,LP and SELV HTP, LHTP
Fig 19
Continuous trickle (6l/s or 9l/s) with switch live boost facility
~N
Ls
0V
Tempra
Controller
LS
LN
SELV Supply
(24V DC)
24V
LS 24V
0V
~N
Ls
0V
Tempra
Controller
LS
LN
SELV Supply
(24V DC)
24V
LS 24V
0V

C. SETUP
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED
FROM THE POWER SUPPLY DURING THE INSTALLATION / OR MAINTENANCE.
Fig. 20
TRICKLE SPEED SELECTION (6l/s or 9l/s) – (Fig. 20)
In Trickle running mode the fan can extract at either 6l/s (22m3/h) or 9l/s (32m3/h) flow rate. The fan
will boost to 15l/s (54m3/h) when the LS / Humidity / Pull cord connection is switched.
Factory set at 6l/s (22m3/h).
Remove jumper connector (JP2) if 9l/s (32m3/h) extract flow rate is required.
PULLCORD OPERATION (P,LP AND HTP,LHTP MODELS)
THE PULLCORD ACTIVATES THE BOOST TO ON OR OFF.
TIMER ADJUSTMENT (T,LT AND HTP,LHTP MODELS) (FIG. 20)
THE TIMER IS ONLY ACTIVATED VIA THE LS CONNECTION.
1. The controller is factory set at 15 minutes approx. The overrun time period can be
adjusted from 5-50 minutes by altering the adjuster on the control PCB.
2. To INCREASE the operating time, use a small screwdriver to turn the TIMER adjuster
CLOCKWISE.
3. To REDUCE the operating time, use a small screwdriver to turn the TIMER adjuster
ANTI CLOCKWISE.
4. In addition a 3 minute delay on timer is included this can be de-activated by removing
(JP3).
HUMIDITY SET-POINT ADJUSTMENT SVHTP MODEL (FIG. 20)
NOTE:- ON INSTALLATION IT IS POSSIBLE THAT THE HUMIDITY CONTROLLER WILL RUN CONTINUOUSLY UNTIL IT HAS ACCLIMATIZED
TO THE ENVIRONMENT.
1. The controller is factory set to switch on at about 70% RH. The humidity set point can
be adjusted from 60-90%RH by altering the adjuster on the control PCB.
2. To LOWER the set-point use a small screwdriver to turn the HUMIDITY adjuster
ANTI-CLOCKWISE. This makes the controller MORE sensitive.
3. To RAISE the set-point use a small screwdriver to turn the HUMIDITY adjuster
CLOCKWISE. This makes the controller LESS sensitive.
8
FAST ON
TRICKLE DELAY

D. MAINTENANCE.
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED FROM
THE POWER SUPPLY DURING MAINTENANCE.
The fan should be cleaned to ensure there is no build up of dirt or other deposits.
1. Remove 2 screws and lift off
Cover Plate assembly Fig 21 & 22.
2. Lift where indicated
to engage hinges Fig 23
and open Door Fig 24.
3. Remove Retaining Plate, Carefully slide out the Heat Exchanger Fig 25 & 26 and wash in warm
water using a mild detergent, dry thoroughly and re assemble in reverse order to above.
.
9
Fig.21 Fig.22
Fig.24
Fig.25 Fig.26
Fig.23

E. Spares
The following spares may be ordered from Vent-Axia
Item Part No Description Models used
1. 445885 Heat exchanger (Short) P,T & HTP
2. 445886 Motor chassis assembly P,LP,T,LT,HTP & LHTP
3. 445892 SELV Cover assembly P,LP,T,LT,HTP & LHTP
4. 444377 SELV power supply unit P,LP,T,LT,HTP & LHTP
5. 445889 Pullcord PCB P & LP (only)
6. 445890 Timer PCB T & LT (only)
7. 445891 HTP PCB HTP & LHTP (only)
8. 455630 Pullcord Assembly P,LP,HTP & LHTP
9. 447838 Wall cover bezel P,LP,T,LT,HTP & LHTP
10. 403878 Heat exchanger (Long) LP,LT & LHTP
10
1. & 10. 2.
3.
4.
5. (P,LP)
6. (T,LT)
7. (HTP,LHTP)
8.
9.

PRODUCT FICHE
For Residential Ventilation Units (Complying Commission Delegated Regulation (EU) No 1254/2014)
11
Name: Vent‐AxiaVent‐AxiaVent‐AxiaVent‐AxiaVent‐AxiaVent‐Axia
ModelID(StockRef.):
Lo‐Carbon
TempraSELV
P‐444368
Lo‐Carbon
TempraSELVLP
‐403833
Lo‐Carbon
TempraSELVT‐
444369
Lo‐Carbon
TempraSELV
LT‐403835
Lo‐Carbon
TempraSELV
HTP‐444370
Lo‐CarbonTempra
SELVLHTP‐403837
SECClassEEEEBB
SECValue('Average')41.3041.3041.6841.6843.9943.99
SECValue('Warm')18.6718.6718.8518.8519.8919.89
SECValue('Cold')80.7980.7981.5481.5486.0686.06
LabelRequired?(Yes/No=Outof
scope)NoNoNoNoNoNo
Declaredas:RVUorNRVU/UVU
orBVURVU‐BVURVU‐BVURVU‐BVURVU‐BVURVU‐BVURVU‐BVU
SpeedDriveMulti‐SpeedMulti‐SpeedMulti‐SpeedMulti‐SpeedMulti‐SpeedMulti‐Speed
TypeHRS(Recuperative,
Regenerative,None)NoneNoneNoneNoneNoneNone
ThermalEff:[(%),NA(ifnone)]N/AN/AN/AN/AN/AN/A
Max.FlowRate(m3/h)54.0054.0054.0054.0054.0054.00
Max.PowerInput(W):
(@Max.FlowRate)26.6026.6026.6026.6026.6026.60
LWA:SoundPowerLevel(dB)53.5253.5253.5253.5253.5253.52
Ref.FlowRate(m3/s)0.010.010.010.010.010.01
Ref.PressureDiff.(Pa)N/AN/AN/AN/AN/AN/A
SPI[W/(m3/h)]0.700.700.700.700.700.70
ControlFactor&Control
Typology:(CTRL/Typology)     
ControlFactor;CTRL1.001.000.950.950.650.65
ControlTypologyManual
ControlManualControlClockControlClockControlLocal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;
N/AN/AN/AN/AN/AN/A
MixingRateofNon‐DuctedBVUs
notintendedtobeequipped
withoneductconnectionon
eithersupplyorextractairside;
N/AN/AN/AN/AN/AN/A
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N/AN/AN/AN/A
ForUVUs(InstructionsInstall
RegulatedSupply/ExtractGrilles
Façade)
InF&WInF&WInF&WInF&WInF&WInF&W
InternetAddress(for
DisassemblyInstructions)
www.vent‐
axia.com
www.vent‐
axia.com
www.vent‐
axia.com
www.vent‐
axia.com
www.vent‐
axia.comwww.vent‐axia.com
Sensitivityp.Variation@+20/‐20
Pa:(forNon‐DuctedVus)N/AN/AN/AN/AN/AN/A
AirTightness‐ID/OD‐(m3/h)(for
Non‐DuctedVus)N/AN/AN/AN/AN/AN/A
AnnualElectricityConsumption:
AEC(kWh/a)10.1510.159.439.435.535.53
AnnualHeatingSaved:AHS
(kWh/a)     
AHS:Average41.3041.3041.6841.6843.9943.99
AHS:Warm18.6718.6718.8518.8519.8919.89
AHS:Cold80.7980.7981.5481.5486.0686.06

12

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]
Web:-www.vent-axia.com Email:- [email protected]
As part of the policy of continuous product improvement Vent-Axia reserves the right to alter specifications without notice.
444367 G
1116
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