homevent HV PIV LOFT 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 unit is only suitable for installation in single or two storey dwellings, with a “cold roof” construction, where no storey is 4.5 metres or more
above ground level.
• The device should not be used for applications other than those specified in this manual.
• Aer 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.
• 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 should be supervised to ensure that they do not play with the device.
• WARNING: Never use the fan unit without the provided flexible ducting, air valve and filter attached.
• WARNING: In order to avoid overheating, do not obstruct the airflow into and out of the fan unit.
• 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.
• The unit is designed for use in ambient temperatures of -10 °C up to +60 °C and up to 90% Relative Humidity.
• 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 inlet filter or supply air valve to ensure optimum air passage.
• Ensure adequate air supply into the lo space 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
HV PIV LOFT
Positive Input Ventilation Unit

2.
INTRODUCTION
The HV PIV LOFT is a positive input ventilation unit suitable for installation in a lo. It continuously supplies fresh air through a single, Supply Air
Valve, situated on the ceiling of the top floor in a central hallway or landing.
The unit is suitable for hanging using the cord provided or roof joist mounting.
WHAT IS IN THE BOX
1. Fan Unit with Pre-wired 3 Pin Plug and Lead
2. Filter
3. Flexible Duct
4. Control Box
5. Control Box Connection Cable and Jack Plug
6. Supply Air Valve
7. Installer Label
8. Dyno-ties
9. Hanging Cord
10. Installation and Maintenance Instructions
PRE-INSTALLATION LOFT CHECK
Prior to installation the lo should be inspected to ensure there is adequate ventilation of the lo. The presence of daylight is a good indication of a lo
that is suitably ventilated. Advice should be obtained if the lo is tightly sealed.
There should be no leaks from the house into the lo. Extractor fans should not discharge straight into the lo. Lo hatches and holes for ceiling lights
should be adequately sealed.
The unit must not be installed in a lo space that is open to another property’s lo space e.g. in a terraced home without a barrier between lo spaces.
TECHNICAL SPECIFICATIONS
• Acoustically lined, painted metal fan casing incorporating high efficiency mixed flow fan.
• Supplied with white painted metal Supply Air Valve.
• An ultra-quiet EC motor / fan assembly.
• G4 filter fitted provided as standard with large surface area to provide long filter life and efficient filtration of incoming air.
• Supplied with quality flexible duct to connect fan unit and supply air valve.
• Single duct connection to supply fresh clean air without the need to create holes in external walls.
• Control box (HV-POT-10-TB) and cable supplied as standard.
• Power Supply 230V - 50 / 60Hz.
OPERATION
The HV PIV LOFT Unit can be set to operate in a number of different ways using the control box (HV-POT-10-TB) supplied which is connected to the
Fan Unit using a supplied length of connection cable incorporating a jack plug. Wiring diagrams 2-7 which follow show the various control options
possible and wiring diagrams for each.

3.
INSTALLATION
Supply Air Valve
The 150mm diameter Round White Metal Ceiling Air Supply Valve is manufactured from White Epoxy Powder Coated Steel. The valve has a male
spigot to fit directly to the supplied flexible ducting.
The Supply Air Valve is fully adjustable and has a locking nut to fix the position of the control disc upon commissioning. The valve should be open to
reduce the power used by the unit.
The Supply Air Valve is supplied complete with fixing body with pre-drilled holes for installation.
The Supply Air Valve should not be located within 1 metre of a smoke or CO detector or heating thermostat.
The unit can be suspended using the cord provided or mounted onto the roof joints.
Please ensure that there is a least 150mm clear all around the unit, including the bottom, to allow air to enter the unit via the filter.
Please pay particular attention to make sure mineral wool or other lo insulation material is at least 150mm away from any part of the unit.
Timber spacers on joists may be required to achieve this.
The flexible duct must be securely attached to the supply air valve and the fan unit and the filter to the fan unit using the dyno-ties supplied.
Mounting the Unit
Ø135mm
51mm
38.5mm
Ø201mm
Ø135mm
Ø202mm

4.
WIRING DIAGRAMS
Wiring Diagram 1
Control Box (HV-POT-10-TB) connected by
installer to control box cable on-site, with
the control box cable connected to fan unit
using the jack plug supplied.
3 pin fused plug on lead pre-wired
to fan unit.
This should be connected to a suitable
230 volt ac, single phase, 50/60Hz power
supply.
Note:
If the unit is required to switch off when the lo temperatures is very high (e.g. during hot summer days) this can be achieved by the installer
providing a suitable thermostatic switch to interrupt the mains power supply to the unit when the selected trigger temperature is reached with the
switch switching power back on to the unit again when the temperature drops below the selected trigger temperature.

5.
Wiring Diagram 2
Continuous running at Normal Airflow (set via VR2)
RED BLACK
BLUE
VR2 SPEED
ADJUSTER
VR1 SPEED
ADJUSTER
HV-POT-10-TB
CONTROL BOX CABLE CONNECTED TO FAN
USING JACK PLUG SUPPLIED.
LINK

6.
Wiring Diagram 3
Continuous running at Normal Airflow (set via VR2) with Boosted Airflow (set via VR1) when triggered by suitable user control switch inside the
home provided by installer
RED BLACK
BLUE
VR2 SPEED
ADJUSTER
VR1 SPEED
ADJUSTER
HV-POT-10-TB
CONTROL BOX CABLE CONNECTED TO FAN
USING JACK PLUG SUPPLIED.
USER CONTROL SWITCH
C

7.
Wiring Diagram 4
Continuous running at Normal Airflow (set via VR2) with Reduced Airflow (set via VR1) when triggered by suitable user control switch inside the
home provided by installer
RED BLACK
BLUE
VR2 SPEED
ADJUSTER
VR1 SPEED
ADJUSTER
HV-POT-10-TB
CONTROL BOX CABLE CONNECTED TO FAN
USING JACK PLUG SUPPLIED.
USER CONTROL SWITCH
C

8.
Wiring Diagram 5
Continuous running at Normal Airflow (set via VR2) with Boosted Airflow (set via VR1) when triggered by suitable humidistat or other IAQ switch
inside the home provided by installer
RED BLACK
BLUE
VR2 SPEED
ADJUSTER
VR1 SPEED
ADJUSTER
HV-POT-10-TB
CONTROL BOX CABLE CONNECTED TO FAN
USING JACK PLUG SUPPLIED.
Suitable humidistat or other IAQ
switch inside the home provided
by installer
C

9.
Wiring Diagram 6
Continuous running at Normal Airflow (set via VR2) with Heat Recovery Increased Airflow (set via VR1) when triggered by suitable thermostatic
switch in the roof space provided by installer
RED BLACK
BLUE
VR2 SPEED
ADJUSTER
VR1 SPEED
ADJUSTER
HV-POT-10-TB
CONTROL BOX CABLE CONNECTED TO FAN
USING JACK PLUG SUPPLIED.
Suitable thermostatic switch in the
roof space provided by installer
C

10.
Wiring Diagram 7
Continuous running at Normal Airflow (set via VR2) with Comfort Control Decreased Airflow (set via VR1) when triggered by suitable thermostatic
switch in the roof space provided by installer
RED BLACK
BLUE
VR2 SPEED
ADJUSTER
VR1 SPEED
ADJUSTER
HV-POT-10-TB
CONTROL BOX CABLE CONNECTED TO FAN
USING JACK PLUG SUPPLIED.
Suitable thermostatic switch in the
roof space provided by installer
C

11.
The installer should ensure that the Supply Air Valve is locked in the open position shown above. The performance data in the table below is
based on this.
SETTING SUPPLY AIR VALVE OPENING
A small slotted head screwdriver can be used to adjust the fan speed on VR1 and VR2 in the Control Box. The table below shows the approximate
airflow, power consumption and specific fan power at approximate positions. Actual airflows should be confirmed on site using an appropriate airflow
measuring device.
SETTING VR1 AND VR2 VENTILATION RATES
INDICATIVE PERFORMANCE DATA
Position of
VR1 or VR2
Ventilation
Rate (I/s)
Power
Consumption (W) SFP
Fully anti-clockwise 0 0 0
10% clockwise 0 0 0
20% clockwise 22 2 0.09
30% clockwise 30 5 0.17
40% clockwise 36 10 0.28
50% clockwise 38 15 0.39
60% clockwise 44 18 0.41
70% clockwise 48 23 0.48
80% clockwise 54 32 0.59
90% clockwise 56 36 0.64
100% clockwise 58 40 0.69
To optimise air distribution and limit noise,
the installer must ensure that the front edge
of the adjustable control disc is fixed in place
flush with the peak of the curved edge of the
outer body of the Supply Air Valve.
STANDARD CONFORMITY
• 2014/35/EC Low Voltage Directive (LVD)
Electrical Safety
• EN60335-1:2012+A11:2014+A13:2017+A1:2019+A2:
2019+A14:2019
• EN60335-2-80:2003+A1:2004+A2:2009
• EN62233:2008
Certificate No: DL-20210123001C

12.
INSTALLATION & INSTALLERS DETAILS - FOR HV PIV LOFT UNIT
Installation Address:
Installer’s Name:
Installation Company Name
and Address:
Tel:
Email:
Details of CPS Membership:
CPS Membership Number:
Installation Date:
COMMISSIONING & COMMISSIONING ENGINEERS DETAILS – FOR HV PIV LOFT UNIT
Installation Address:
Commissioning Engineer’s Name:
Commissioning Company Name
and Address:
Tel:
Email:
Details of CPS Membership:
CPS Membership Number:
Commissioning Date:
Ventilation Rate Set at VR1 (l/s):
Ventilation Rate Set at VR2 (l/s):
Method of Operation:
The Installer or Commissioning Engineer must explain to the home occupants how this unit ventilates their home, the method of operation above
and how the unit is serviced and maintained as described in the section which follows. The Installer or Commissioning Engineer should take a copy
of this completed document for their records and leave the full original completed document with the occupants for their future use and reference.
The Installer or Commissioning Engineer should confirm having actioned the aforementioned by ticking the relevant box below.
□ Installer
□ Commissioning Engineer

13.
SERVICING REQUIRED & SERVICE RECORD - FOR HV PIV LOFT UNIT
Servicing Required
Name of Person (and
Company if Applicable) Who
Carried Out Service
Date Servicing Done
1st Service
Within 1 year of installation
Vacuum clean filter if required
and clean supply air valve and
surrounding ceiling by light
dusting if required
2nd Service
Within 1 year of previous service
Change filter and clean supply air
valve and surrounding ceiling by
light dusting if required
3rd Service
Within 1 year of previous service
Vacuum clean filter if required
and clean supply air valve and
surrounding ceiling by light
dusting if required
4th Service
Within 1 year of previous service
Change filter and clean supply air
valve and surrounding ceiling by
light dusting if required
5th Service
Within 1 year of previous service
Vacuum clean filter if required
and clean supply air valve and
surrounding ceiling by light
dusting if required
Subsequent Services should
follow a similar routine to
the above
Replacement filter code: 021-PIV-SA-FILT-C

HV PIV LOFT. ISSUE A. 07.22
WARRANTY
Our 2 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: +44 (0) 1384 275822, Email: sales@homevent.co.uk
46 Third Avenue, Pensnett Trading Estate, Kingswinford, West Midlands, DY6 7US, UK
www.homevent.co.uk
a) Mark -Homevent
b) Model - HV PIV LOFT
c) SEC class - C
c1) SEC warm climates kWh/m2.a -1.5
c2) SEC average climates kWh/m2.a -10.5
c3) SEC cold climates kWh/m2.a -21.5
Energy label -No
d) Unit typology - NRVU - UVU
e) Type of drive -Variable-speed drive
f) Type of Heat Recovery System -Absent
g) Thermal efficiency of heat recovery %N/A
h) Maximum flow rate m3/h 208
i) Electric power input at maximum flow rate W40
j) Sound power level (LWA)dBA 24
k) Reference flow rate m3/h 108
l) Reference pressure difference Pa 199
m) Specific power input (SPI) W/m3/h 0.324
n1) Control factor -0.65
n2) Control typology -Local demand control
o1) Maximum internal leakage rate % N / A
o2) Maximum external leakage rate % N / A
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 %10
u) Indoor / outdoor air tightness m3/h 54
v1) AEC - Annual electricity consumption - warm climates kWh 154
v2) AEC - Annual electricity consumption - average climates kWh 179
v3) AEC - Annual electricity consumption - cold climates kWh 230
w1) AHS - Annual heating saved - warm climates kWh N/A
w2) AHS - Annual heating saved - average climates kWh N/A
w3) AHS - Annual heating saved - cold climates kWh N/A
ErP DIRECTIVE - REGULATIONS 1253 / 2014 - 1254 / 2014
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