Envirovent PIV User manual

PIV & MIV®
VENTILATION UNIT INSTALLATION GUIDE
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT THROW AWAY
PIV & MIV®
VENTILATION UNIT INSTALLATION GUIDE
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT THROW AWAY

PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
1
Safety
Read and understand these instructions before beginning
installation. The unit should be installed by a competent person.
Location
Check there is space for the unit in your chosen location. The unit must not
affect the operation of open-flue appliances. Consult local regulations or a
qualified gas engineer. For inline units consider the external vent location
in relation to open-flues from appliances e.g. boilers. You must ensure the
vent is positioned a minimum of 300mm away in all directions.
The open sides of the diffuser must face a minimum 1m unobstructed path
away from any smoke detectors. If the diffuser cannot be repositioned,
up to two sides can be closed using the plastic blanking plates. In this
configuration the open sides must face a minimum 1.5m unobstructed
path away from any smoke detectors. If using the 100mm diffusers, no
blanking plates are supplied and the diffusers must be repositioned.
In properties with a floor above 4.5m fire diffusers must be fitted a
minimum of 1m away from the smoke detectors instead of the included
plastic diffusers.
Partition walls between buildings must be complete with any breaks
filled.
In properties with a floor more than 4.5m above ground level the unit must
be wired into a smoke alarm (see page 15 for wiring information).
The appliance is considered suitable for use in countries with a warm
damp equable climate, but may also be used in other countries.

AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 2
Wiring Regulations
All wiring must comply with Building Regulations and the current IET
Wiring Regulations (BS7671 in the UK) or equivalent standards for other
countries. The final installation should be examined and tested by a
qualified electrician.
This product is not suitable for use with a Type AC RCD
Electrical Connection
The unit requires a continuous electrical power supply through a residual
current device (RCD) having a rated residual operating current not exceeding
30mA. Connection to the fixed wiring must be made outside the unit in a
suitable location. The unit must be earthed and a double pole switch with a
minimum contact separation of 3.0mm must be used to provide insulation
for the unit. The unit must be able to be disconnected from the mains
supply after installation. When wiring the unit, the included unswitched
fuse spur should be incorporated in the fixed wiring.
The power supply cable running into the unit must remain the supplied
flexible cable (not a solid core lighting cable). If the power supply cable
becomes damaged, it must be replaced by EnviroVent, an authorised
service agent for your region/country, or a similarly qualified person in
order to avoid a hazard. Do not remove or tamper with any electronic
components inside the product.
Users
The unit is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities or lack of experience and
knowledge, unless they have been given supervision and usage instruction
by a person responsible for their safety. Children should be supervised
to ensure they do not play with the unit. Cleaning and user maintenance
must not be performed by children.

PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
MIV
3
Diagrams
406 mm
ø100 mm
406 mm
373 mm
PIV
ø200 mm
406 mm 406 mm
373 mm
FILTER
PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
MIV
3
Diagrams
406 mm
ø100 mm
406 mm
373 mm
PIV
ø200 mm
406 mm 406 mm
373 mm
FILTER

AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 4
KEYPAD
21 3 4
65 7
9
8
10
1 - Airflow 1
2 - Airflow 2
3 - Airflow 3
4 - Airflow 4
5 - Temperature <190C
6 - Temperature >190C
7 - Temperature >250C
8 - Top button
9 - Numeric Display
10 - Bottom button
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 4
KEYPAD
21 3 4
65 7
9
8
10
1 - Airflow 1
2 - Airflow 2
3 - Airflow 3
4 - Airflow 4
5 - Temperature <190C
6 - Temperature >190C
7 - Temperature >250C
8 - Top button
9 - Numeric Display
10 - Bottom button

PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
5
WIRING
TO CONNECT OPTIONAL 0-10V (RF AND APP UNITS
ONLY) OR HEATER ENABLE CABLE SEE STEP 1 TO 4
VENTILATION UNIT
The local isolator must be connected to the mains as part of the fixed
wiring. Connect the N, L and E cores of the power cable to the matching
terminals on the local isolator.
1
3
2
4
Make small hole in grommet
and thread 2 core cable through
Remove base cap (two screws)
Remove link and wire in 2 core cable Replace base cap (two screws)
LOCAL ISOLATOR
MAINS SUPPLY
230V 50/60HZ
POWER CABLE
N E L
N
E
L
0-10V
Red=+V
Blue=0V
PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
5
WIRING
TO CONNECT OPTIONAL 0-10V (RF AND APP UNITS
ONLY) OR HEATER ENABLE CABLE SEE STEP 1 TO 4
VENTILATION UNIT
The local isolator must be connected to the mains as part of the fixed
wiring. Connect the N, L and E cores of the power cable to the matching
terminals on the local isolator.
1
3
2
4
Make small hole in grommet
and thread 2 core cable through
Remove base cap (two screws)
Remove link and wire in 2 core cable Replace base cap (two screws)
A A
B B
C C
D D
E E
F F
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
A A
B B
C C
D D
E E
F F
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
A A
B B
C C
D D
E E
F F
8 8
7 7
6 6
5 5
4 4
3 3
2 2
1 1
LOCAL ISOLATOR
MAINS SUPPLY
230V 50/60HZ
POWER CABLE
N E L
N
E
L
0-10V
Red=+V
Blue=0V

AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 6
PIV box contents
• 1x PIV unit
• 1x 200mm diffuser (+ 2x
blanking plates)
• 1x Instruction guide
• 1x Diffuser mounting template
• 1x Flexible duct (1m x 200mm
dia.)
• 1x Unswitched fuse spur
• 1x Remote control (Wireless
units)
• 8x Foam pads
• 4x Washers
• 4x Screws 10g x 3”
• 4x Screws 10g x 1.5”
• 4x Screws 8g x 1.5”
• 4x Screws 8g x 1”
• 4x Plasterboard plugs
• 2x 200mm duct fixings
MIV box contents
• 1x MIV unit
• 2x 100mm diffusers (+blanking
plates)
• 1x Instruction guide
• 2x Flexible ducts (3m x 100mm
dia.)
• 1x Unswitched fuse spur
• 1x Remote control (Wireless
• units)
• 8x Foam Pads
• 4x Washers
• 4x Screws 10g x 3”
• 4x Screws 10g x 1.5”
• 4x Screws 8g x 1.5”
• 4x Screws 8g x 1”
• 4x Plasterboard Plugs
• 4x 100mm duct Fixings
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 6
PIV box contents
• 1x PIV unit
• 1x 200mm diffuser (+ 2x
blanking plates)
• 1x Instruction guide
• 1x Diffuser mounting template
• 1x Flexible duct (1m x 200mm
dia.)
• 1x Unswitched fuse spur
• 1x Remote control (Wireless
units)
• 8x Foam pads
• 4x Washers
• 4x Screws 10g x 3”
• 4x Screws 10g x 1.5”
• 4x Screws 8g x 1.5”
• 4x Screws 8g x 1”
• 4x Plasterboard plugs
• 2x 200mm duct fixings
MIV box contents
• 1x MIV unit
• 2x 100mm diffusers (+blanking
plates)
• 1x Instruction guide
• 2x Flexible ducts (3m x 100mm
dia.)
• 1x Unswitched fuse spur
• 1x Remote control (Wireless
• units)
• 8x Foam Pads
• 4x Washers
• 4x Screws 10g x 3”
• 4x Screws 10g x 1.5”
• 4x Screws 8g x 1.5”
• 4x Screws 8g x 1”
• 4x Plasterboard Plugs
• 4x 100mm duct Fixings

PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
7
Pre - Installation Checklist
• Does the unit fit through the loft hatch?
• Check there are no obstructions in the hallway or landing where the
diffuser is to be fitted and in the loft space above.
• Ensure the loft has adequate cross-flow ventilation to provide a
supply of fresh air to the unit.
• Check that all partition walls are intact. Seek building advice if any
are missing or broken.
• Check for flued appliances drawing air from the loft, the user should
be made aware of any of these.
• Check that any flue passing through the loft is undamaged. Seek
building advice if any are damaged or broken.
• Repair any ceiling gaps which allow air leakage into the loft.
• Ensure any loft water storage tanks are covered and sealed.
About PIV and MIV units
Positive Input Ventilation (PIV) and Multiple Input Ventilation (MIV) units
create fresh and healthy living environments by supplying filtered air
into a property at a continuous rate through ceiling mounted diffusers.
The diffusers are normally installed in a hallway or landing area.
The units have been developed to improve indoor air quality and resolve
condensation and mould problems and are designed to operate for
5 years with no requirement for maintenance other than replacement
of the filter. It is recommended that the filters are replaced after
5 years usage.
PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
7
Pre - Installation Checklist
• Does the unit fit through the loft hatch?
• Check there are no obstructions in the hallway or landing where the
diffuser is to be fitted and in the loft space above.
• Ensure the loft has adequate cross-flow ventilation to provide a
supply of fresh air to the unit.
• Check that all partition walls are intact. Seek building advice if any
are missing or broken.
• Check for flued appliances drawing air from the loft, the user should
be made aware of any of these.
• Check that any flue passing through the loft is undamaged. Seek
building advice if any are damaged or broken.
• Repair any ceiling gaps which allow air leakage into the loft.
• Ensure any loft water storage tanks are covered and sealed.
About PIV and MIV units
Positive Input Ventilation (PIV) and Multiple Input Ventilation (MIV) units
create fresh and healthy living environments by supplying filtered air
into a property at a continuous rate through ceiling mounted diffusers.
The diffusers are normally installed in a hallway or landing area.
The units have been developed to improve indoor air quality and resolve
condensation and mould problems and are designed to operate for
5 years with no requirement for maintenance other than replacement
of the filter. It is recommended that the filters are replaced after
5 years usage.

AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 8
In conditions between 19°C - 25°C the units will increase air flow rate
by 10%. In hot conditions above 25°C the units will temporarily switch
off to avoid bringing hot air into the property from the loft space.
The PIV Unit uses a single 200mm diffuser to provide air into a hallway
or landing area.
The MIV unit uses two 100mm diffusers to provide airflow to separate
locations within the building. It is normally required for applications
where:
a) The hallway is small.
b) Limited heating is available.
c) The loft hatch fills the hallway ceiling.
d) Airflow is required in a remote area such as a bedroom.
Option 1 If a higher airflow is required in the hallway, position
that diffuser a shorter distance from the unit.
Other room
(lower flow rate)
Hallway
(higher flow rate)
Option 2 If a similar airflow is required in the hallway, position
both diffusers at similar distances from the unit.
Other room
(similar flow rate)
Hallway
(similar flow rate)
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 8
In conditions between 19°C - 25°C the units will increase air flow rate
by 10%. In hot conditions above 25°C the units will temporarily switch
off to avoid bringing hot air into the property from the loft space.
The PIV Unit uses a single 200mm diffuser to provide air into a hallway
or landing area.
The MIV unit uses two 100mm diffusers to provide airflow to separate
locations within the building. It is normally required for applications
where:
a) The hallway is small.
b) Limited heating is available.
c) The loft hatch fills the hallway ceiling.
d) Airflow is required in a remote area such as a bedroom.
Option 1 If a higher airflow is required in the hallway, position
that diffuser a shorter distance from the unit.
Other room
(lower flow rate)
Hallway
(higher flow rate)
Option 2 If a similar airflow is required in the hallway, position
both diffusers at similar distances from the unit.
Other room
(similar flow rate)
Hallway
(similar flow rate)

PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
9
2b
Installation
1. Place a dust sheet below the required ceiling diffuser position and
check the ceiling below and loft space above are unobstructed.
2. a) For PIV mark a 222mm diffuser hole using the template.
2. b) For MIV mark two 105mm diffuser holes (see page 9 for
positioning information).
3. Wearing a dust mask and eye protection, cut out the hole/s.
2a1
3
PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
9
2b
Installation
1. Place a dust sheet below the required ceiling diffuser position and
check the ceiling below and loft space above are unobstructed.
2. a) For PIV mark a 222mm diffuser hole using the template.
2. b) For MIV mark two 105mm diffuser holes (see page 9 for
positioning information).
3. Wearing a dust mask and eye protection, cut out the hole/s.
2a1
3

AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 10
4. a) Screw the feet of the unit onto two 25mm x 50mm wood battens
using the four 10g x 1.5” screws. (Battens not supplied).
4. b) Position the unit with anti-vibration pads and washers onto the
loft ceiling joists as in the diagram.
4. c) Screw the battens to the ceiling joists using the four 10g x 3”
screws.
4. d) If the loft insulation sits above the joists and impedes the unit,
create a raised wooden platform to mount onto.
4a 4b
4c 4d
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 10
4. a) Screw the feet of the unit onto two 25mm x 50mm wood battens
using the four 10g x 1.5” screws. (Battens not supplied).
4. b) Position the unit with anti-vibration pads and washers onto the
loft ceiling joists as in the diagram.
4. c) Screw the battens to the ceiling joists using the four 10g x 3”
screws.
4. d) If the loft insulation sits above the joists and impedes the unit,
create a raised wooden platform to mount onto.
4a 4b
4c 4d

PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
11
5. Insert the diffuser spigot into the ceiling hole so that the diffuser
outlets face towards the walls then mark the four fixing holes.
6. Attach the duct to the spigot of the diffuser and seal the connection
using the fixings supplied.
7. Insert the diffuser spigot into the hole then fix it in place.
Use the four plasterboard plugs and four 8g x 1.5”.
Then clip the diffuser cover into the diffuser spigot.
8. Attach the flexible duct to the spigot on the unit and ensure it is
pulled taught. Seal the connection tightly using the fixings supplied.
Cut the duct to length if required.
PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
11
5. Insert the diffuser spigot into the ceiling hole so that the diffuser
outlets face towards the walls then mark the four fixing holes.
6. Attach the duct to the spigot of the diffuser and seal the connection
using the fixings supplied.
7. Insert the diffuser spigot into the hole then fix it in place.
Use the four plasterboard plugs and four 8g x 1.5”.
Then clip the diffuser cover into the diffuser spigot.
8. Attach the flexible duct to the spigot on the unit and ensure it is
pulled taught. Seal the connection tightly using the fixings supplied.
Cut the duct to length if required.
PIV & MIV
01423 859 395
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
11
5. Insert the diffuser spigot into the ceiling hole so that the diffuser
outlets face towards the walls then mark the four fixing holes.
6. Attach the duct to the spigot of the diffuser and seal the connection
using the fixings supplied.
7. Insert the diffuser spigot into the hole then fix it in place.
Use the four plasterboard plugs and four 8g x 1.5” panhead
screws. (Do not use countersunk screws on the diffuser).
Then clip the diffuser cover into the diffuser spigot.
8. Attach the flexible duct to the spigot on the unit and ensure it is
pulled taught. Seal the connection tightly using the fixings supplied.
Cut the duct to length if required.
5 6
7 8

AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 12
9. With the mains supply isolated, wire the power cable into the
unswitched fuse spur then wire the unswitched fuse spur into the
mains supply (see wiring diagram on page 5).
Use two of the 8g x 1” screws to attach the spur to a loft joist.
10. If a wired heater enable switch (not included) is required,
connect it to the black heater cable. Mount it in an accessible area
of the property. Use two of the 8g x 1” screws to attach the
switch to the wall.
11. Reconnect the electrical supply to the unit. Air should begin to
flow from the diffuser. Press button 1 to show current air flow rate.
12. Further presses will cycle through the air flow rate settings.
10
109
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 12
9. With the mains supply isolated, wire the power cable into the
unswitched fuse spur then wire the unswitched fuse spur into the
mains supply (see wiring diagram on page 5).
Use two of the 8g x 1” screws to attach the spur to a loft joist.
10. If a wired heater enable switch (not included) is required,
connect it to the black heater cable. Mount it in an accessible area
of the property. Use two of the 8g x 1” screws to attach the
switch to the wall.
11. Reconnect the electrical supply to the unit. Air should begin to
flow from the diffuser. Press button 1 to show current air flow rate.
12. Further presses will cycle through the air flow rate settings.
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 12
9. With the mains supply isolated, wire the power cable into the
unswitched fuse spur then wire the unswitched fuse spur into the
mains supply (see wiring diagram on page 5).
Use two of the 8g x 1” screws to attach the spur to a loft
joist.
10. If a wired heater enable switch is required, connect it to the
black heater cable. Mount it in an accessible area of the property.
Use two of the 8g x 1” screws to attach the switch to the wall.
11. Reconnect the electrical supply to the unit. Air should begin to
flow from the diffuser. Press button 1 to show current air flow rate.
12. Further presses will cycle through the air flow rate settings.
9 10
11 12
Single press Further presses
10
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 12
9. With the mains supply isolated, wire the power cable into the
unswitched fuse spur then wire the unswitched fuse spur into the
mains supply (see wiring diagram on page 5).
Use two of the 8g x 1” screws to attach the spur to a loft
joist.
10. If a wired heater enable switch is required, connect it to the
black heater cable. Mount it in an accessible area of the property.
Use two of the 8g x 1” screws to attach the switch to the wall.
11. Reconnect the electrical supply to the unit. Air should begin to
flow from the diffuser. Press button 1 to show current air flow rate.
12. Further presses will cycle through the air flow rate settings.
9 10
11 12
Single press Further presses
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 12
9. With the mains supply isolated, wire the power cable into the
unswitched fuse spur then wire the unswitched fuse spur into the
mains supply (see wiring diagram on page 5).
Use two of the 8g x 1” screws to attach the spur to a loft
joist.
10. If a wired heater enable switch is required, connect it to the
black heater cable. Mount it in an accessible area of the property.
Use two of the 8g x 1” screws to attach the switch to the wall.
11. Reconnect the electrical supply to the unit. Air should begin to
flow from the diffuser. Press button 1 to show current air flow rate.
12. Further presses will cycle through the air flow rate settings.
9 10
11 12
Single press Further presses
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 12
9. With the mains supply isolated, wire the power cable into the
unswitched fuse spur then wire the unswitched fuse spur into the
mains supply (see wiring diagram on page 5).
Use two of the 8g x 1” screws to attach the spur to a loft
joist.
10. If a wired heater enable switch is required, connect it to the
black heater cable. Mount it in an accessible area of the property.
Use two of the 8g x 1” screws to attach the switch to the wall.
11. Reconnect the electrical supply to the unit. Air should begin to
flow from the diffuser. Press button 1 to show current air flow rate.
12. Further presses will cycle through the air flow rate settings.
9 10
11 12
Single press Further presses
109

PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
13
Fire Safety
Smoke Kits
For installations with a floor more than 4.5m above ground, a
compatible smoke kit must be fitted. The kits listed below contain
all the extra parts and instructions required:
Order Code Description
KIT-PIV-SMOKE-125 PIV smoke kit with 1x 125mm diffuser
KIT-PIV-SMOKE-150 PIV smoke kit with 1x 150mm diffuser
KIT-PIV-SMOKE-200 PIV smoke kit with 1x 200mm diffuser
KIT-MIV-SMOKE-125 MIV smoke kit with 2x 125mm diffusers
Smoke Alarms
For installations with a floor more than 4.5m above ground, the unit
should be wired into a smoke alarm, in order to switch the unit off upon
the detection of smoke. A smoke alarm kit is available using order code
1ACSMOKEALARM-KIT. The unit can also be wired into an existing smoke
alarm (check compatibility with the smoke alarm manufacturer).
All wiring should be completed by a competent person.
To test the installation, press the TEST button on top of the smoke
alarm and keep it pressed until the PIV unit switches off (LEDs on the
board go out).
PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
13
Fire Safety
Smoke Kits
For installations with a floor more than 4.5m above ground, a
compatible smoke kit must be fitted. The kits listed below contain
all the extra parts and instructions required:
Order Code Description
KIT-PIV-SMOKE-125 PIV smoke kit with 1x 125mm diffuser
KIT-PIV-SMOKE-150 PIV smoke kit with 1x 150mm diffuser
KIT-PIV-SMOKE-200 PIV smoke kit with 1x 200mm diffuser
KIT-MIV-SMOKE-125 MIV smoke kit with 2x 125mm diffusers
Smoke Alarms
For installations with a floor more than 4.5m above ground, the unit
should be wired into a smoke alarm, in order to switch the unit off upon
the detection of smoke. A smoke alarm kit is available using order code
1ACSMOKEALARM-KIT. The unit can also be wired into an existing smoke
alarm (check compatibility with the smoke alarm manufacturer).
All wiring should be completed by a competent person.
To test the installation, press the TEST button on top of the smoke
alarm and keep it pressed until the PIV unit switches off (LEDs on the
board go out).

AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 14
SMOKE ALARM WIRING
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 14
SMOKE ALARM WIRING

PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
15
Wireless Remote Control
•To indicate the current status of the unit:
-Press the remote-control button once and the LEDs will light up
according to the current status of the unit.
•To modify the air flow rate:
-Press the remote-control button once
-Further presses will then cycle the unit through each of the air flow
rate settings – 1 , 2 , 3 , 4
-Further presses will cycle back through the same settings
•To enable/disable the automatic comfort heater function:
- This function is enabled by default.
- Press the remote-control button once.
- Press again for 5 seconds to disable comfort heater function.
- AUTO LED will flash red for 5 seconds.
- Press again for 5 seconds to enable comfort heater function.
- AUTO LED will light constant red for 5 seconds.
(Flashes Green)
Remote control in range
(Flashes Green)
(Flashes Red)
Remote control not in range
(Flashes Red)
(Red)
Auto heater enabled (Constant Red)
Auto heater disabled (Flashing Red)
PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
15
Wireless Remote Control
•To indicate the current status of the unit:
-Press the remote-control button once and the LEDs will light up
according to the current status of the unit.
•To modify the air flow rate:
-Press the remote-control button once
-Further presses will then cycle the unit through each of the air flow
rate settings – 1 , 2 , 3 , 4
-Further presses will cycle back through the same settings
•To enable/disable the automatic comfort heater function:
- This function is enabled by default.
- Press the remote-control button once.
- Press again for 5 seconds to disable comfort heater function.
- AUTO LED will flash red for 5 seconds.
- Press again for 5 seconds to enable comfort heater function.
- AUTO LED will light constant red for 5 seconds.
(Flashes Green)
Remote control in range
(Flashes Green)
(Flashes Red)
Remote control not in range
(Flashes Red)
(Red)
Auto heater enabled (Constant Red)
Auto heater disabled (Flashing Red)

AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 16
Pairing an additional remote-control:
1. Turn the unit off at the isolation point.
2. Restore power; for 20 seconds from restart the unit will be in
pairing mode.
3. Press the remote-control button once within the 20 seconds and
the control will pair to the unit.
4. Successful pairing is indicated by a green light on the remote.
Remote-control batteries
When the battery needs to be replaced, unscrew the switch front
cover. The battery is located on the back of the cover. Battery type
3V Lithium CR2032. The switch will remain paired with the unit after
battery replacement. Ensure the new battery is inserted with correct
polarity, and the removed battery is safely disposed of.
Wired comfort heater enable/disable
A switch to enable/disable the heater function can be connected up
to 3 metres away from the unit. This must be a volt free contact.
Do not wire the cable or switch into the Mains. When the switch is
pressed on, the comfort heater function is enabled and the system
will maintain the incoming air temperature at 10 °C. When the switch
is pressed off, the automatic comfort heater function is disabled.
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 16
Pairing an additional remote-control:
1. Turn the unit off at the isolation point.
2. Restore power; for 20 seconds from restart the unit will be in
pairing mode.
3. Press the remote-control button once within the 20 seconds and
the control will pair to the unit.
4. Successful pairing is indicated by a green light on the remote.
Remote-control batteries
When the battery needs to be replaced, unscrew the switch front
cover. The battery is located on the back of the cover. Battery type
3V Lithium CR2032. The switch will remain paired with the unit after
battery replacement. Ensure the new battery is inserted with correct
polarity, and the removed battery is safely disposed of.
Wired comfort heater enable/disable
A switch to enable/disable the heater function can be connected up
to 3 metres away from the unit. This must be a volt free contact.
Do not wire the cable or switch into the Mains. When the switch is
pressed on, the comfort heater function is enabled and the system
will maintain the incoming air temperature at 10 °C. When the switch
is pressed off, the automatic comfort heater function is disabled.

PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
17
House size setting Max air flow rate (l/s)aPower usage (Watts)b
1. 21 4
2. 29 4
3. 38 6
4. 49 9
Energy Usage and Airflow Performance
a Diffuser installed without blanking plates fitted.
b Power usage shown with comfort heater function disabled.
Running costs
Please scan our QR code to
see the annual running costs
of this product.
Or visit: envirovent.com/annual-running-costs
PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
17
House size setting Max air flow rate (l/s)aPower usage (Watts)b
1. 21 4
2. 29 4
3. 38 6
4. 49 9
Energy Usage and Airflow Performance
a Diffuser installed without blanking plates fitted.
b Power usage shown with comfort heater function disabled.
Running costs
Please scan our QR code to
see the annual running costs
of this product.
Or visit: envirovent.com/annual-running-costs

AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 18
Item Description Order Code
Replacement coarse particle filter
(ISO Coarse 65%) FILTERPIV-COARSE
Replacement medium particle filter
(ePM10 50%) FILTERANC-MEDI
Replacement fine particle filter
(ePM2.5 50%) FILTERANC-FINE
Replacement coarse particle filter
including carbon
(ISO coarse 65% including carbon)
FILTERANC-COARSE+C
Replacement 200mm diffuser 1DIFEVLDIF
Replacement 100mm diffusers 1DIFEVLSML1
Fixing kit FIXINGKITEVL
Heater switch SWHHEATER
Smoke alarm 1ACSMOKEALARM-KIT
Spares/Accessories
Maintenance
The PIV and MIV units are designed to operate for 5 years before requiring a full
service. In order to maintain the warranty, the filters must be replaced at the
5 year point. The unit should be isolated form the power when replacing the filters.
If there are very high amounts of particulate matter in the air and loft space, the
filter will need to be replaced more frequently.
AFTER INSTALLATION THE END USER SHOULD
KEEP THIS GUIDE FOR FUTURE REFERENCE
DO NOT
THROW AWAY 18
Item Description Order Code
Replacement coarse particle filter
(ISO Coarse 65%) FILTERPIV-COARSE
Replacement medium particle filter
(ePM10 50%) FILTERANC-MEDI
Replacement fine particle filter
(ePM2.5 50%) FILTERANC-FINE
Replacement coarse particle filter
including carbon
(ISO coarse 65% including carbon)
FILTERANC-COARSE+C
Replacement 200mm diffuser 1DIFEVLDIF
Replacement 100mm diffusers 1DIFEVLSML1
Fixing kit FIXINGKITEVL
Heater switch SWHHEATER
Smoke alarm 1ACSMOKEALARM-KIT
Spares/Accessories
Maintenance
The PIV and MIV units are designed to operate for 5 years before requiring a full
service. In order to maintain the warranty, the filters must be replaced at the
5 year point. The unit should be isolated form the power when replacing the filters.
If there are very high amounts of particulate matter in the air and loft space, the
filter will need to be replaced more frequently.

PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
19
Warranty
We appreciate you choosing this quality EnviroVent product, which is designed and
manufactured to the highest specification in Harrogate, North Yorkshire. We are
confident that you will be delighted with the performance of the system and the
resulting improvement in air quality in your home after the installation of the unit.
This unit is covered by a full 10-year warranty. There is no requirement for
maintenance other than replacement of the filter after 5 years and general cleaning.
The warranty covers any defect or break down that arises due to faulty materials
or construction. Please note that a receipt will be required as proof of purchase.
Any units bought from an unapproved source, including but not limited to auction
websites, are not covered by this warranty.
Your unit serial number
For warranty conditions and exclusions, visit
www.envirovent.com/warranty
What should I do if I have a problem?
You should not dismantle or remove any parts of the unit other than those
instructed in this guide. Tampering with the unit will void the warranty. For further
assistance, please call 01423 810 810.
20 PIV & MIV
01423 810 810
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
Warranty
We appreciate you choosing this quality EnviroVent product, which is designed and
manufactured to the highest specification in Harrogate, North Yorkshire. We are
confident that you will be delighted with the performance of the system and the
resulting improvement in air quality in your home after the installation of the unit.
This unit is covered by a full 10-year warranty. There is no requirement for
maintenance other than replacement of the filter after 5 years and general cleaning.
The warranty covers any defect or break down that arises due to faulty materials
or construction. Please note that a receipt will be required as proof of purchase.
Any units bought from an unapproved source, including but not limited to auction
websites, are not covered by this warranty.
Your unit serial number
For warranty conditions and exclusions, visit
www.envirovent.com/warranty
What should I do if I have a problem?
You should not dismantle or remove any parts of the unit other than those
instructed in this guide. Tampering with the unit will void the warranty. For further
assistance, please call 01423 810 810.