Vent-Axia PoziDry Compact Pro Assembly instructions

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PoziDry
Compact Pro
Positive Input Ventilation Unit
Installation and Wiring Instructions
Stock Ref. N°
479188 –PoziDry Compact Pro
220-240V~50Hz

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
Installation and Wiring Instructions for the
PoziDry Compact Pro Positive Ventilation Unit.
INTRODUCTORY NOTES
The Unit is a positive input ventilation unit, designed to be installed on a wall of a dwelling to continually supply
filtered fresh air into the building. The system consists of a fan unit with heater.
The Unit has an adjustable speed settings. These speeds are set during installation; there are 4 pre-set speeds or an
option allowing the speeds to be chosen manually from 10 L/s - 30 L/s. The Unit uses a sensor to monitor the supply
temperature into the room. If the ambient room temperature exceeds 27°C (adjustable during commissioning), the
unit will automatically switch to standby (no airflow), unless installed in radon mode (selectable during
commissioning).
All models are supplied with a heater; the element is activated by default when the supply air temperature drops
below the adjustable threshold. The heater will try and maintain the supply air temperature at the threshold
temperature. The threshold temperature can be adjusted during commissioning.
The unit also incorporates a data logging function. This function will display total runtime of system, energy
consumption of the fan and energy consumption of the heater. This data is resettable (when in data logging menu,
hold the + and –button for 15 seconds until you see the word “RESET” on the display).
SAFETY AND GUIDANCE NOTES
IMPORTANT:
READ THESE INSTRUCTIONS BEFORE COMMENCING THE INSTALLATION
1.DO NOT install this product in areas where the following may be present or occur:
1.1. Excessive oil or a grease laden atmosphere.
1.2. Corrosive or flammable gases, liquids or vapours.
1.3. Ambient temperatures higher than 40°C or less than -10°C.
1.4. Possible obstructions which would hinder access or removal of the Fan.
1.5. Relative humidity above 90%
1.6. Sudden ductwork bends or transformations close to the Unit.
1.7. Unit must be mounted over 1.8m from floor level.
2. 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.
3. The fan must be provided with a 3A fused, isolator switch capable of disconnecting all
poles, having a contact separation of at least 3mm.
4. Ensure that the mains supply (voltage, frequency, and phase) complies with the fan’s
rating label.
5. The fan should not be used where it is liable to be subjected to direct water spray.
7. This appliance can be used by children aged from 8 years and above and persons
with reduced physical, sensory or mental capabilities or lack of experience and
knowledge if they have been given supervision or instruction concerning use of the
appliance in a safe way and understand the hazards involved. Children shall not play
with the appliance. Cleaning and user maintenance shall not be made by children
without supervision.
8. Precautions must be taken to avoid the back-flow of gases into the room from the
open flue of gas or other fuel-burning appliances.
9. Children of less than 3 years should be kept away unless continuously supervised.

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10. Children aged from 3 to 8 years shall only switch on/off the appliance provided the
unit is installed as intended for normal operation and they have been given
supervision or instruction concerning safe use of the appliance and understand the
hazards involved.
11. Children aged 3 to 8 shall not plug in, regulate and clean the appliance or perform
user maintenance.
Caution - some parts of this product can become very hot and cause burns. Particular
attention has to be given where children and vulnerable people are present.
UNIT SIZE
UNIT MOUNTING
Unit to be mounted horizontally
Unit must be mounted over 1.8m from floor level.

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INSTALLATION
The Unit is wall-mounted using the bracket and fixings supplied (or other suitable fasteners).
The wall should have sufficient strength to support the unit.
Take into consideration the routing of the cable and the ducting that must be fitted to the inlet spigot.
The unit can be mounted vertically or horizontally on a vertical wall.
Hand tighten these 2
screws, when fitting
the scroll assembly.
Feed power supply
through Base plate or
bottom left hand side
of unit, then through
the rear of the foam
before securing unit.

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INLET OPTIONS
OPTION - 1
OPTION - 2
If installing the unit with the air supply
coming through the rear, the metal
plate cut-out will need to be removed from
base plate and the rear foam
case will need to be cut-out before mounting.
See next page for details.

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Base Plate
Rear Foam
Using the centre mark, cut through the foam housing using a hole saw
Snip the three tabs to remove the insert

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OUTLET OPTIONS
OPTION - 1

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OUTLET OPTIONS
OPTION - 2

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OUTLET OPTIONS
OPTION - 3

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FILTER INSTALLATION
Please make sure the filter is fitted correctly and retained on top of the scroll. This will ensure that all the fresh air
entering the dwelling has passed through the filter first.
Slide filter on top of scroll
Push filter over retaining clip
to secure it in place.

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COVER PLATES –GRILLE & BLANKING
When using the cover plates on the front of the unit, care must be taken when snapping them free.
Only the cover plate that is being used in the front of the housing needs to be modified.
It is recommended to install the grille facing towards the ceiling to minimise the effect of cold draughts

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WIRING
A means for disconnection must be incorporated, in the fixed wiring in accordance with the wiring
regulations.
WARNING: THE POSITIVE VENTILATION UNIT AND ANCILLARY CONTROL EQUIPMENT
MUST BE ISOLATED FROM THE POWER SUPPLY DURING THE INSTALLATION / OR
MAINTENANCE.
Mains supply voltages (220-240V AC) are present in this equipment which may cause death or serious injury by
electric shock. Only a qualified electrician or installer should connect the power supply to this unit.
The Unit is designed for operation from a single-phase alternating current source (220-240V AC).
The unit must be connected with a suitable lead via a 3A switched fused spur.
It should be capable of disconnecting all poles, having a contact separation of at least 3mm.
START UP SEQUENCE
When the unit is switched on it will first run through a period of system checks. During this time the display will show
various system parameters before the fan motor starts. After 20 seconds the product will be ready for
commissioning.
COMMISSIONING
Accessing the Commissioning Menu
If the fan is powered and the display is not lit, then press any button to access the menu. After 30 seconds without
menu activity the display will switch off, any changes to the settings will then be applied.
There are three buttons on the front of the unit:
The + button is used to increase the value of a setting, the –button is used to reduce the value of a setting and the
Mode button moves to the next menu item.
+
-
MODE

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LOCK FEATURE
The lock feature will prevent the unit from being adjusted after commissioning as a pass code is required to access
the menu. This can be set in the menu to any 3 digit hexadecimal combination.
If the lock feature is enabled; when a button is pressed the display will show, –––. At this point enter the three digit
code by first pressing + or –until the first digit is correct then press MODE to move to the next digit. Repeat until the
code is entered and press MODE to enter the commissioning menu. If the code is entered incorrectly, wait until the
screen switches off then press any button to begin again.
AIR FILTER
The Unit is provided with an ISO Coarse (G4) filters which are suitable for removing airborne contaminants such as
pollen and dust.
Where improved filtration is required optional ISO ePM2.5 (F7) filters can be used. These filters are effective at
removing finer particles such as particulate emissions from diesel engines. In urban areas close to main roads, ISO
ePM2.5 (F7) filters are advisable in order to ensure the supply air is clear of these particles which are potentially
harmful to health.
www.vent-axia.com/filters
Where ISO ePM2.5 (F7) filters are fitted, please ensure the flow rate of the fan is as expected. F7 filters cause
extra system resistance so it may be necessary to increase the fan speed to compensate.
COMMISSIONING MENU STRUCTURE
* This setting rotates the display only; the buttons retain their original function. For example; the mode button is on
the right when in normal rotation and on the left when the screen is rotated and looking at the fan so the display is
correctly orientated.
** Display: unl
Description: menu lock on or off. When locked a code is required to access the menu
Options: unl –unlocked Loc –Locked.
*** Display: cod
Description: Set the menu lock code. This is a 3 digit hexadecimal code, set between 0 - F.
Options: press up or down to start choosing the first digit then press mode to set and move to the next digit. Repeat
to set the other two digits. Default override code is 999.
Display text
Installation Option
Selections
rot-rot
Display rotation*
rot-rot = Default
r-y rot = Rotated 180o
d-n / d-y
Ducted Yes/No
d-n = Default
d-y = Yes
p-n / p-y
Preset Speed No/Yes
p-n = No
p-y = Yes
b01 - b04
Number of Bedrooms 1-4
b01/02/03/04 = Range
b01 = Default
t10 –t30
Flowrate 10-30 L/s
t10 –t30 L/s
c05 –c20
Heater setpoint 5-20°C
c05-c20°C
c10 = Default
F.G4 –F.F7
Filter fitted G4/F7
G4 = Default
F7 = Optional
r-n / r-y
Radon mode No/Yes
r-n = Default
r-y = Yes
t26 –t35
Summertime cutoff 26-35°C
t26 –t35 = Range
t27 = Default
unl / loc
Lock feature On/Off**
unl = unlocked
Ioc = Locked
cod
Lock code***
Set between 0 - F

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For most installs the standard features allow for ample adjustability, however in some install situations the advanced
features will improve the unit’s performance or acceptability.
Radon mode keeps the fan running even at high temperatures to prevent the build-up of dangerous radon gas in the
property. If this is not required it is recommended not to use this setting.
SPEED SETTINGS
The unit will run constantly at the set speed, with the following exceptions.
If the ambient inlet temperature exceeds the Summertime Cut-off temperature 27°C (default), the Unit automatically
switches to standby (no airflow). If Radon Mode in enabled, the Unit will continue to run beyond the normal threshold
temperatures.
The speed settings on the Unit are fully adjustable between 10 L/s and 30 L/s via the manual speed setting option.
Alternatively there are 4 Pre-set speeds, the speed settings relate to the number of bedrooms with, for example,
setting b03 being for a three bedroom dwelling. For the approximate flow rates at each setting see table below.
The Unit must be set to provide adequate ventilation according to Part F of the building regulations.
Ducted Mode –No Ducted Mode –Yes
Static Pressure: 0 Pa Static Pressure: 12 Pa
The table shows a set up representative of a good, low resistance install. When F7 filters and/or a long duct
run are used it may be necessary to use the manual speed selection to meet the required flow rate.
It is the responsibility of the installer to ensure that appropriate speeds are selected.
SERVICING AND MAINTENANCE.
WARNING: THE POSITIVE VENTILATION UNIT AND ANCILLARY CONTROL EQUIPMENT
MUST BE ISOLATED FROM THE POWER SUPPLY DURING THE INSTALLATION / OR
MAINTENANCE.
The fan motor uses sealed ball bearings, and does not require further lubrication.
Apart from filter change the Unit contains no user serviceable parts.
Under normal conditions; i.e. away from main roads and industrial areas it is recommended that the filter is checked
annually and cleaned or replaced as necessary. Otherwise change as required.
The filter may be gently cleaned with a vacuum cleaner or washed in a soapy water solution and allowed to air dry
before re-fitting. Do not dry the filter in a tumble dryer.
When re-fitting make sure that the filter is fitted correctly. This will ensure that all the fresh air entering the
dwelling has passed through the filter first.
No.
Bedrooms
L/s
Power (W)
b01
13
5W
b02
17
8W
b03
21
12W
b04
25
18W
No.
Bedrooms
L/s
Power (W)
b01
13
3.5W
b02
17
6W
b03
21
9W
b04
25
14W

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ACCESSING DATA LOGGER MENU
To access the menu for data that the unit stores press and hold the mode button for 5 seconds. The menu structure
is shown below, press mode to move to the next item:
Data Examples
Text scrolling from right to left
In this example the display is showing a total run time of 1 year and 237 days.
Text scrolling from right to left
In this example the display is showing 34Wh of energy consumption in the previous 24h.
To exit the menu press MODE for 5 seconds or wait for the screen to switch off.
Spares and accessories available for the Pozidry Compact Pro:
Spares and Accessories
Part Number
ABS COVER
479843
SILENCER KIT
479857
ACOUSTIC FLEXI DUCT
443273
ROUND TO RECTANGLE ADAPTOR - ∅105mm to 55x110mm
400740
REPLACEMENT 3 BUTTON SCROLL ASSY
479859
FILTER ISO Coarse (G4)
479860
FILTER ISO ePM2.5 (F7)
479861
WALL FITTING KIT
254102
Display text
Description
tot run 00y 00d
Total run time in years and days
Fan EnErgy 00(Wh)
Energy used in last 24 hours displayed in Wh
Heat EnErgy 00(kWh)
Energy used in last 24 hours displayed in kWh
tot EnErgy 00.0
Total Energy used displayed in kWh

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Disposal
This product should not be disposed of with household waste. Please recycle where facilities exist. Check
with your local authority for recycling advice.

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]
For details of the warranty and returns procedure please refer to www.vent-axia.com or write to Vent-Axia
Fleming Way, Crawley, RH10 9YX
479633 B 0619
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 this product for 7 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 affect your legal rights