homevent SANO PIV WALL Instruction Manual

Please read this manual carefully before using the product and keep it in a
safe place for reference.
This product was constructed up to standard and in compliance with regulations relating to
electrical equipment and must be installed by technically qualified personnel in accordance
with all regulatory requirements. The manufacturer assumes no responsibility for damage to
persons or property resulting from failure to observe the instructions contained in this booklet.
PRECAUTIONS FOR INSTALLATION, USE & MAINTENANCE
• The device should not be used for applications other than those specified in this manual.
• Aer removing the product from its packaging, verify its condition. In case of doubt, contact a qualified technician. Do not leave packaging
within the reach of small children or people with disabilities.
• Do not touch the appliance with wet or damp hands/feet.
• 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.
• Children should be supervised to ensure that they do not play with the device.
• WARNING: In order to avoid overheating, do not cover/close the air exit.
• Do not use the product in the presence of flammable vapours, such as alcohol, insecticides, gasoline, etc.
• If any abnormalities in operation are detected, disconnect the device from the mains supply and contact a qualified technician immediately. Use
original spare parts only for repairs.
• The electrical system to which the device is connected must comply with applicable regulations.
• Before connecting the product to the power supply or the power outlet, ensure that:
• - The data plate (voltage and frequency) correspond to those of the electrical mains.
• - The electrical power supply/socket is adequate for maximum device power. If not, contact a qualified technician.
• Operating temperature: 0°C up to +40°C.
• Do not leave the device exposed to atmospheric agents (rain, sun, snow, etc.).
• Do not immerse the device or its parts in water or other liquids.
• Only turn off the power supply to the unit whenever a malfunction is detected or in the case of inspection, cleaning or maintenance. Prolonged
and/or repeated power interruption to the unit (any period more than 72 hours) can create a health and safety hazard, damage components and
will invalidate any warranty.
• For installation an omnipolar switch should be incorporated in the fixed wiring, in accordance with the wiring regulations, to provide a full
disconnection under overvoltage category III conditions (contact opening distance equal to or greater than 3mm).
• Do not obstruct the fan or exhaust grille to ensure optimum air passage.
• Ensure adequate air supply into the room in compliance with existing regulations in order to ensure proper device operation
• If the environment in which the product is installed also houses a fuel-operating device (water heater, methane stove etc., that is not a “sealed
chamber” type), it is essential to ensure adequate air intake, to ensure good combustion and proper equipment operation.
• Install the product so that the impeller is not accessible from the air outlet side as verified by contact with the Test Finger (test probe “B” of the
norm EN61032) in compliance with the current safety regulations.
Installation &
Maintenance Manual
SANO PIV WALL
Positive Input Ventilation Unit
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INTRODUCTION
The SANO PIV Wall is a positive input ventilation unit suitable for installation on a wall for dwellings without a lo space. It continuously supplies
fresh air through a discharge diffuser, that should be situated in the central hallway or landing. The unit has multiple options for the inlet spigot; on
both sides and the back of the unit allowing multiple installation options. The unit can also be configured to discharge air from the le or right hand
side.
WHAT IS IN THE BOX
1. Ventilation unit
2. Filter (pre-fitted)
3. Installation Manual
4. Installer label
5. Blank panel (if back inlet used)
6. Side panel with outlet grille for use as required
TECHNICAL SPECIFICATIONS
• Outer fan casing manufactured from pre-coated galvanised sheet steel providing a lightweight construction.
• An ultra-quiet EC motor/fan assembly for energy saving, mounted on ball bearings that guarantee a longer product life and is suitable for cold
climates.
• G2 filter fitted as standard with large surface area to provide long filter life and efficient filtration of incoming air.
• All fans are individually tested before leaving the factory and are designed and manufactured to procedures defined in BS EN ISO 9001:2015.
• Power Supply 230V – 50/60Hz.
Power W max Sound pressure dB(A) @3m
28 27
Unit setting Inlet grille (5m duct 2x bends) Outlet grille
Flow Rate Watts Flow Rate Watts
1 13 3.7 14 4.5
2 17 4.8 17 5.2
3 21 6.4 21 6.9
4 25 9.2 25 9.3
5 29 11.1 29 12.7
6 33 16.8 34 16.8
The power consumption shown is Normal mode.
INSTALLATION
Duct work should be kept as simple as possible minimising duct length and the number of bends. This will optimise the unit’s effectiveness. Ducting
from the external to the unit should be kept as short as possible as condensation can form on the cold ductwork if it is not insulated.
The unit comes fitted with round 100mm spigots for easy fitment of round rigid ducting. If rectangular 110x54 ducting is required a rectangular to
round adaptor can be fitted directly to the spigot. To do this the spigot must be cut to 25mm length.
Enough room needs to be allowed to access the screws for maintenance.
The diffuser or grille supplying air into a home should be fitted a minimum of 1000mm away from a central heating thermostat.
The diffuser or grille supplying air into a home should be fitted a minimum of 1000mm away from any smoke or CO detectors. If this is not possible
seek specialist advice.
If the property is, or is part of a building that has a storey 18m or above ground level, additional careful design consideration is required due to the
complex nature and health and safety implications of such installations. If considering a PIV unit installation in such a property, seek specialist advice.

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DIMENSIONS
Dimensions are in mm.
PIV UNIT
Ensure that flexible ducting is pulled tight and is not kinked or crushed. This will impact the performance of the unit and may cause noise.
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Inlet options from right hand side. Inlet options from le hand side.
Optional outlet grille shown right hand side.
If a PIV unit is being considered to supply air into or via a protected escape route (defined here as a protected stairway or protected lobby that a front
door of a property opens on to and does not form part of the individual property itself) seek specialist advice for such applications as there may be a
need for fire and smoke dampers as well as interlinks with a smoke detection system.
It is not always possible to determine if a hallway wall within an existing flat is fire rated or not. For safety reasons, the incorporation of a mechanical or
intumescent fire damper within the duct penetrating the hallway wall is highly recommended to be fitted in all cases. Any gaps between the outside
of the duct and the hole in the wall should also be sealed with intumescent mastic. Fire collars which wrap around the ducting can also be used
instead of dampers within the ducting.
In addition to the above, all relevant regulatory documentation, especially in relation to fire and electrical safety, should be referred to and complied
with.

WALL MOUNTING
Before mounting ensure the desired location leaves enough room for access and maintenance. There are multiple mounting configurations make sure
you have decided on the most suitable before drilling any holes.
The back panel can be removed and offered up to the wall ensuring that is level. The mounting hole positions can now be marked and rear duct entry if
required.
Drill the marked holes and insert the suitable wall plugs.
Double check the holes line up with the rear panel and reassemble the unit in the desired configuration.
Attach rear panel to the wall using suitably sized screws.
Affix insulation piece to rear panel.
Li the unit up and align with the rear panel on the wall.
Secure unit to rear panel by replacing pozi-head screws.
Supply air into hallway. Rear inlet option.
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PENCIL
PENCIL PENCIL
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WARNING: Air outlet only on top.
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OPERATION
Introduction
The SANO PIV WALL unit runs continuously
a low ventilation level supplying fresh clean
air into your home. This fresh air dilutes the
stale and humid air in your home and is a great
way to prevent and even cure condensation
dampness and mould problems.
The unit setting is selected by the installer to
suit the size, layout, thermal properties and
moisture production in the home. Getting
this setting right is very important and is oen
based on the experience of the installer. It is as
important not to over ventilate as it is to under
ventilate a home. The Homevent residential
team has much experience in setting PIV units
and can be contacted anytime for advice.
The unit has numerous automatic speed
adjustments to optimise ventilation and
energy use.
Normal Mode
The unit will run in this mode for the vast
majority of its time until the unit’s integral
temperature sensor switches it to “Heat
Recovery” or “Comfort Control”, or “Standby”
mode or the “Override Boost” mode (if
connected via a suitable switch) is activated by
the occupants.
This rate is set via 3 dip switches shown in the
wiring diagram, when leaving the factory this
is set to 21l/s.
Heat Recovery or Comfort Control Mode
When the Comfort Control mode function is
required, and the home is above an adjustable
temperature the unit will automatically switch
to the selected speed. This lower speed will
reduce the
energy used by the ventilation unit and the
amount of uncomfortably warm air being
brought in. This temperature can be selected
for conditions where condensation is less
likely to occur such as the summer months.
Summer Standby Mode
The summer shutdown function limits the
chance of the house overheating when
temperatures outside reach a level that
is uncomfortable. The unit will essentially
switch off when the temperature reaches a
“Standby” trigger temperature to save energy
and prevent undesirable warm air being
introduced unnecessarily in to the home.
Some customers wish to have their unit
operating all year round e.g. for Radon Gas
control or pollen filtration during summer.
That’s why an adjustable trigger temperature
has been incorporated.
This temperature set point is adjustable via
V2 trimmer (shown in the wiring diagram)
between 20° and 40°C, the default when
leaving the factory is 26°C.
Override Boost Mode
The unit’s automatic controls can be
overridden to operate the unit at its maximum
airflow by means of a user switch.
The override boost can be triggered via a
dedicated external volt free switch connecting
GND and S3 terminals (shown in diagram).
Purge operation overrides any other speed
settings.
This function can be incorporated at
installation stage or later. The unit will function
automatically with or without it.
To prevent excessively warm air being
supplied to the home and to protect the
components of the unit, the purge will not
operate above 40°C.
ELECTRICAL WIRING
The unit must be earthed.
Fig.1 Control boxFig.1 Control box
(Optional by installer)(Optional by installer)

0
50
100
150
200
250
0 5 10 15 20 25 30 35 40 45 50 55 60
Pa
l/s
iPIV WALL
Dip 000
Dip 001
Dip 010
Dip 011
Dip 100
Dip 101
Dip 110 (PURGE)
NORMAL MODE SPEED SETTING
To set the Normal mode airflow rate use the table below to set dip switches as shown in Figure 1 Control box.
PLEASE NOTE: Do not change the setting of DIP4 switch.
DIP1 DIP2 DIP3 DIP4
0 0 0 1
0 0 1 1
0 1 0 1
0 1 1 1
1 0 0 1
1 0 1 1
1 1 0 1
TRIMMER SETTING
1 2 3 4
1
0
DIP Switches
SANO PIV Wall
Trimmer label Operation Range Default
V1 Heat recovery or comfort control mode trigger temperature 15 to 25°C 19°C
V2 Summer standby trigger temperature 20 to 40°C 25°C
HY % increase/decrease when in Heat Recovery or comfort control mode -50% of trickle to 50% of trickle 0
(DEFAULT)
Trimmer label Operation Range Default
V1 Heat recovery or comfort control mode trigger temperature 15 to 25°C 19°C
V2 Summer standby trigger temperature 20 to 40°C 26°C
HY % increase / decrease when in Heat Recovery or Comfort Control Mode -50% to +50% of Normal mode
airflow 0
V1 V2 HY
15°C
16,5°C
18,5°C
20°C
21,5°C
23,5°C
25°C 20°C
23°C
27°C
30°C
33°C
37°C
40°C
0
-50% +50%
-40% +40%
-20% +20%

MAINTENANCE
Make sure the mains supply of the unit is disconnected before performing any maintenance. The maintenance must be carried out by a qualified
technician and in accordance with local rules and regulations.
Filters of the unit require changing according to the filter change period. When the filters are dirty less air will be supplied by the unit and impact
the effectiveness of the unit. In areas of high pollution e.g. beside main roads more regular replacement may be required. Filters can be supplied by
Homevent; part code 021-PIV-W-FILT. Filters should be checked annually or if a drop in ventilation rates are noticed.
The filter should be checked regularly to determine if it needs cleaning or replacement. External environmental conditions will determine how oen
the filter will need to be cleaned or replaced. Reduced airflow, perhaps accompanied by an increase in noise level, may provide indication that the
filter needs to be cleaned or replaced. The filter should be inspected and cleaned with a vacuum cleaner or replaced as required at intervals
not exceeding 2 years and always replaced at intervals not exceeding 5 years.
STANDARD CONFORMITY
2014/35/EU Low Voltage Directive (LVD)
2014/30/EU Electromagnetic Compatibility (EMC), in conformity with the following standards:
Electrical Safety: EN60335-1(2012)+A11+A13; EN 60335-2-80(2003)+A1+A2.
Electromagnetic Compatibility: EN 55014-1(2017); EN 55014-2(2015); EN 61000-3-2(2014); EN 61000-3-3(2013).
Year Required Maintenance
1Inspect, clean filter if required, dust inside the unit if required.
2Inspect, clean or replace filter if required, dust inside the unit if required.
3Inspect, clean filter if required, dust inside the unit if required.
4Inspect, clean or replace filter if required, dust inside the unit if required.
5Inspect, replace filter, dust inside the unit if required.
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ErP Directive - Regulations 1253/2014 - 1254/2014
a) Mark - Homevent
b) Model - SANO PIV WALL
c) SEC class - B
c1) SEC warm climates kWh/m2.a -10.6
c2) SEC average climates kWh/m2.a -26.1
c3) SEC cold climates kWh/m2.a -53.1
Energy label - No
d) Unit typology - Residential - unidirectional
e) Type of drive - Multi-speed drive
f) Type of Heat Recovery System - Absent
g) Thermal efficiency of heat recovery % N/A
h) Maximum flow rate m3/h 120
i) Electric power input at maximum flow rate W635
j) Sound power level (LWA)dBA 43
k) Reference flow rate m3/h 84
l) Reference pressure difference Pa 50
m) Specific power input (SPI) W/m3/h 0.119
n1) Control factor - 0.65
n2) Control typology - Local demand control
o1) Maximum internal leakage rate % N/A
o2) Maximum external leakage rate % 2
p1) Internal mixing rate % N/A
p2) External mixing rate % N/A
q) Visual filter warning - N/A
r) Instructions to install regulated grilles - check the instruction booklet
s) Internet address for pre/disassembly instructions - www.homevent.co.uk
t) Airflow sensitivity to pressure variations % N/A
u) Indoor/outdoor air tightness m3/h N/A
v1) AEC - Annual electricity consumption - warm climates kWh 0.9
v2) AEC - Annual electricity consumption - average climates kWh 0.9
v3) AEC - Annual electricity consumption - cold climates kWh 0.9
w1) AHS - Annual heating saved - warm climates kWh 12.8
w2) AHS - Annual heating saved - average climates kWh 28.3
w3) AHS - Annual heating saved - cold climates kWh 55.4

SANO PIV WALL. ISSUE C. 01.21
WARRANTY
Our 5 year warranty is provided only to customers who purchased directly from us. If you purchased elsewhere then please contact them directly
and they will let you know their warranty procedure. Our warranty covers repair or replacement of defective goods only. It does not cover any
labour costs associated with defective product or component removal or installation, nor does it cover the cost of sending goods back to us for
inspection. Our warranty is subject to storage, installation, commissioning, inspection and maintenance having been carried out in accordance
with our Installation and Maintenance Instructions (supplied with each product) and which are also available to view, save or print from our website.
Tel: [phone], Email: [e-mail]
46 Third Avenue, Pensnett Trading Estate, Kingswinford, West Midlands, DY6 7US, UK
www.homevent.co.uk