Mitsubishi Electric Lossnay VL-CZPVU-R/L-E User manual

les.mitsubishielectric.co.uk
Homeowner quick start guide
& commissioning record
Follow these easy steps to make the most
of what your Lossnay has to offer

Introduction to your new
Lossnay ventilation system
(Mechanical Ventilation with Heat Recovery)
2
This booklet has been created to enable you to understand the ventilation
system controls to provide a good quality indoor environment for your home.
If you require more in depth information, please refer to the instruction booklets
using the links on page 15.
The Lossnay unit contains low powered fans that extracts air from bathrooms, kitchens, toilets
and utility rooms. It simultaneously supplies a balanced air flow to living spaces such as living
rooms and bedrooms.
The unit includes a heat exchanger that will warm the incoming fresh air with the energy of the
air being extracted. The air paths do not mix with each other and only temperature is exchanged.
Filters keep particles, like dust and pollen from entering inside.
Fresh air supply
into the room
(SA - Supply Air)
Stale air removed
from the room
(RA - Return Air)
Fresh air
from outside
(OA - Outside Air)
Stale indoor
air exhausted
to outside
(EA - Exhaust Air)
Heat exchanger
Main controller
Bypass damper
Lossnay VL-CZPVU-R/L-E

3
Bypass
The Lossnay unit contains a bypass damper that can change the air path of the extracted air so that it
bypasses the heat exchanger. In doing so, the supplied fresh air will be the same temperature as the air
outside. This can be advantageous during the summer period where you may wish to bring in the colder
air from outside to help cool down in the evening.
Putting the unit in auto mode will allow the unit to sense when it is advantageous to do this under the
commissioned settings. The commissioner will set the desired indoor temperature during the summer,
the minimum outdoor temperature to avoid extreme conditions, and a temperature difference between
the two. Details of the commissioned settings should be found in the commissioning log at the back of
this document.
Note: this function requires the right indoor/outdoor conditions. It is not the same as active
cooling/air conditioning and a cooling effect cannot be guaranteed.
Boost switches
Often, a continuous normal/trickle air flow will maintain the fresh air within your home, and a boost
mode will be set up for an event such as showering or cooking when extraction is the most important.
Your unit may be set up to boost automatically, or require you to press a switch nearby. A delay for the
boost can be set by the commissioner to stop nuisance tripping, as well as an overrun feature to maintain
the boost levels beyond the switch being turned off. Details can be found in the commissioning log at
the back of this document. Avoid leaving the unit in boost to minimise energy usage.
Air valves/terminals
The air is supplied and extracted from terminals or air valves that may look
like this image. They will have been set up and commissioned by a professional
engineer to the air flows required in accordance to the building design and
building regulations. Do not attempt to turn or adjust the air valves
yourself as you will upset the balance of the system.
How to operate the system effectively
The system is set up to require minimal user intervention.
The system is designed to continuously run 24/7.
Modern building techniques used create homes that are very air tight, meaning air cannot naturally
move through the dwelling. This is excellent for energy efficiency and reducing carbon emissions.
The Lossnay is a mechanical ventilation system that guarantees your house can breathe appropriately.
Turning off the system can have negative effects on both the dwelling and occupant’s health.
A boost air flow rate may be required during a pollutant generating event such as showering or cooking .
The unit can be installed a multitude of ways to receive a boost command. The most common of these
will be through a light switch type fitting in the extract rooms. It can also be automatic from turning on
the bathroom light or cooker hood, or using humidity sensors.
The installed method should be marked out in the commissioning log book.

No. Name Function
1
2
3
4
5
6
7
ON/OFF button
SELECT button
RETURN button
MENU button
Backlit LCD
ON/OFF lamp
Function buttons
(F1, F2, F3, F4)
-
-
-
The main menu screen is displayed.
Press any button to turn on the backlight.
You will then be able to operate buttons.
The backlight will turn off automatically after a period of time.
This lamp lights up in green while the product is operated.
It blinks in green when the product has an error.
Use to select each settings on each screen.
The functions of the buttons change depending on the screen.
To change the settings of your ventilation system please use the main controller
located on the front panel.
The following is a quick guide to viewing the main settings.
Should you require more information please refer to the instruction booklet.
Main Remote Controller
4
Purge
F1 F2 F3 F4
3
4
2
5
7
6
1

5
This display screen highlights all the functions available on your controller.
Please see below an explanation of each icon.
Main Screen Icons
No. Name Function
1
2
3
4
5
6
7
8
9
10
11
12
13
Controller Name
Clock
Fan speed
Ventilation mode
Function button guide
Filter Sign
Outdoor, Return,
Supply temperature
Lossnay is always displayed.
Current time and day appear here.
Current fan speed setting appears here.
Current ventilation mode setting appears here.
Functions of the corresponding buttons appear here.
Appears when the filter requires maintenance.
Appears when the “Boost/Purge preset”, or
“Manual bypass mode” timer is active.
Appears when the “holiday mode” is enabled.
Appears when performing anti-frost to protect the Heat Exchanger,
by adjusting air volumes or operating a pre-heater.
Appears when the “Silent mode” is active.
This is displayed while linking with an air conditioner.
This is displayed when the Fan speed is fixed by an external input.
The outside air temperature, return air (extract) temperature,
and supply air temperature are displayed.
Purge
7
5
8 10 1112
54
2
13
1
6
9
3

6
Normal Medium Boost Purge
Auto
F1 F2 F3 F4
Some speeds will be hidden if uncommissioned.
In some instances, only 1 speed will be available.
Bypass mode may only be available through the user
options>Manual Bypass mode menu.
It is advised to leave the unit in Auto mode.
Auto
F1 F2 F3 F4
Heat EX BypassAuto Auto
Icon Function
It automatically switches between heat exchange mode
and bypass mode by temperature detection.
Heat exchange mode.
Bypass mode.
Press the button to change the fan speed
in the following order:
Fan Speed Operation
F2
Press the button to go through the
ventilation modes in the following order:
Ventilation Mode
F3
Heat EX
Bypass
Auto Auto

7
Step 1
Step 2
Clock setting is required before making the
following settings.
- Boost/Purge present
- Silent mode
- Manual bypass mode
- Holiday mode
Select «User options» from the «Main menu» screen.
and press the button.
Select “Clock” and press the button.
Clock Setting
Increase or decrease the value, and
press the button.
A confirmation screen will appear.
Navigating through the screens.
- To go back to the «Main menu» screen press
- To return to the previous screen press
F1 F2 F3 F4
Clock
Select:
Cursor
2021 / 01 / 01
yyyy / mm/ dd
00: 00
hh: mm
F1 F2 F3 F4
User options
Boost/Purge preset
Silent mode
Manual bypass mode
Holiday mode
Clock
Main menu:
Cursor

8
Silent Mode
Step 1
Silent mode is an effective mode for noise prevention
at night. During Silent mode, icon will appear on the
«Main Display» screen.
Under Silent mode, the signal from the external input
and are not received.
Select “Silent mode” from «User options» screen,
and press the button.
Step 2
Mode set: Select “No” or “Yes”.
Factory default setting is “No”.
Mode set: “Yes”, You can set day.
Mode set: “On/Off”, You can set the time during day.
Auto
F1 F2 F3 F4
F1 F2 F3 F4
User options
Boost/Purge preset
Silent mode
Manual bypass mode
Holiday mode
Clock
Main menu:
Cursor
F1 F2 F3 F4
Silent mode
Mode set No/Yes
Mon Tue Wed Thu Fri Sat Sun
On/Off 22:00 / 6:00
Cursor
Select:
Time

9
Holiday Mode
Holiday mode is used when you are
away from home. When in holiday
mode, the unit will operate at 50%
of the lowest commissioned speed.
Select Holiday mode from
«User options» screen,
and press the button.
Mode set: Select “Yes” / “No”.
You can set amount of days that you
will not be in the house, 1-90 day(s).
After pressing
Holiday mode starts.
F1 F2 F3 F4
User options
Boost/Purge preset
Silent mode
Manual bypass mode
Holiday mode
Clock
Main menu:
Cursor
Auto
F1 F2 F3 F4
F1 F2 F3 F4
Holiday mode
Mode set No/Yes
No. days away 7 day(s)
Cursor
Select:
Day(s)
F1 F2 F3 F4
Holiday mode
Mode set No/Yes
No. days away 7 day(s)
Cursor
Select:
Day(s)
Step 1
Step 2

10
Filter Information
Step 1
When this sign appears, clean or replace
the filters.
Select Maintenance from «Main menu» screen,
and press the button.
Step 2
Press the button to reset cleaning sign.
Refer to ‘Care of Filers’ section for information
to clean the filters.
F1 F2 F3 F4
Main menuMain
User options
Commissioning
Maintenance
Main display:
Cursor
Auto
F1 F2 F3 F4
F1 F2 F3 F4
Maintenance
Filter
Please clean the parts above.
Then press reset button.
Main menu:
Reset
F4