Vent-Axia Lo-Carbon Tempra P Assembly instructions

Stock Ref. N°
443312 Pullcord. (P)
403832 Pullcord Long cell (LP)
443310 Timer. (T)
403834 Timer Long cell (LT)
443311 Humidistat Timer
Pullcord. (HTP)
403836 Humidistat Timer
Pullcord Lon
g
cell
(
LHTP
)
PLEASE READ INSTRUCTIONS IN CONJUNCTION WITH ILLUSTRATIONS.
PLEASE SAVE THESE INSTRUCTIONS.
Lo-Carbon
Tempra
IPX4
THROUGH THE WALL
HEAT RECOVERY FAN
Installation and Wiring Instructions
220-240V~50Hz

Installation and Wiring Instructions for the Tempra 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 Fan should only be used in conjunction with the appropriate Vent-Axia
products.
E. The fan should only be used in conjunction with fixed wiring.
F. 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.
G. The Fan should not be used where it is liable to be subject to direct water
spray for prolonged periods of time.
H. The horizontal duct should be arranged to slope slightly downwards to the
exterior away from the Fan.
I. This appliance is not intended for use by young children or infirm persons
without supervision.
J. 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 Heat Recovery Fan
The Vent-Axia Lo-Carbon Tempra 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 is available in 6 models
443312 – Tempra P
403832 - Tempra LP (long) Constant trickle speed with pull cord or switch live to
boost airflow.
443310 – Tempra T
403834 – Tempra LT (long) Constant trickle speed with switch live to boost airflow with
adjustable 5-50 min overrun timer and optional 3 minute delay
on timer.
443311 - Tempra HTP
403836 –Tempra LHTP (long) 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 and internal humidistat adjustable 60- 90% RH.
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 Mains cable
through one of the rear
entry points or the side entry
point as required. And then
the door Fig 7 & Fig 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.6
Fig.4
Fig.7 Fig.8
X 4
Fig.9
Fig.5

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 screws provided Fig 12.
11) Close Door and Connect flexible mains cable as
described in section B – Wiring, ensure cable
clamp is used adjust any settings as required
see section C – Setup. Fig 13
5
Fig.10
Fig.11
Fig.12
Fig.13

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 flexible mains cable when connecting fan, to ensure hinged door opens freely.
The fan is suitable for connection to 220-240V 50Hz supply.
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 pull cord boost facility P,LP and HTP,LHTP models
LS
L
Tempra
Switched
Fused Spur
1 Phase Supply
(220-240V 50Hz).
N
L
~
FUSE
N
Fig 19
Continuous trickle (6l/s or 9l/s) with switch live boost facility.
~N
N
LS
LTempra

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 REDUCE the operating time, use a small screwdriver to turn the TIMER adjuster
ANTI-CLOCKWISE.
3. To INCREASE the operating time, use a small screwdriver to turn the TIMER adjuster
CLOCKWISE.
4. In addition A 3 minute delay on timer is included this can be de-activated by removing (JP3).
HUMIDITY SET- POINT ADJUSTMENT HTP 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.
3. 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
Fi
g
.21 Fi
g
.22
Fi
g
.24
Fi
g
.25 Fi
g
.26
Fi
g
.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. 445887 Cover assembly P,LP,T,LT,HTP & LHTP
4. 445888 Power supply PCB 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.