NuAire MRXBOX-VSC Manual

MRXBOX-VSC
Visual System User Control
Installation & Operating Instructions
Due to the higher current consumed by the
MRXBOX-VSC, the max cable run between
the fan control and the MRXBOX-VSC must
be limited to 50m.
1
Nuaire Limited Western Industrial Estate Caerphilly United Kingdom CF83 1NA
T: 029 2085 8400 F: 029 2085 8444 E: [email protected].uk W: www.nuaire.co.uk
The EMC Directive
2004/108/EC
The Low Voltage
directive
2006/95/EC
Remove the bezel and 2 screws to detach front
of unit from
back box.
10m sensor connection
wire (supplied).
Clearance aperture for wire
should be approx 20mm dia
to allow passage of plug end.
Allow approx 120mm of wire
through for fitting to the
backplate.
Wire can be located behind
a wall panel or fixed to wall
surface.
Wall
To fan connector
box terminal
marked NET
Plug end mounted into the PCB socket inside
the front half of the unit. Note that the data
cable socket is
positioned at
the top corner
of the unit.
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Fix back box
to wall using
screws.
Feed cable
through hole
in back box.
Bezel
Front of unit.
Back box.
Bezel
Front of unit
Back box.
TOP
09. 03. 16. eaflet Number 671703
MRXBOX-VSC is a user control from the
Ecosmart range.
They have a 3.5in colour CD touchscreen
display to provide improved user interface.
The unit can be surface or semi-recessed
mounted and is compatible with standard
2-gang recess back box.
MRXBOX-VSC– the unit is all plastic
construction and supplied with 10m of
pre-plugged connection cable and surface
mounting back box.
The units are SE V (12V d.c.) with the power
supplied from the fan unit via the pre-plugged
cable.
1.0 Installation
INSTALLED ENVIRONMENT
0-40oC and up to 90% RH non-condensing.
Caution: The unit must be installed away
from any direct source of heat (e.g. radiators)
and not in areas where it would be subjected
to steam or water spray.
The mounting surface must be free from
vibration.
The unit is supplied with back box suitable for
surface mounting. (see Figs. 1 - 5).
If semi-recess (final projection from wall is
7mm approx) is needed, a proprietary 2-gang
back box (25mm deep min.) may be used.
Always physically check the suitability of the
back box before fitting.
In some instances, the earthing point of the
back box may foul the unit and need to be
removed.
a) Fix one end of the 10m cable to the fan’s
Ecosmart connection point and route the
cable to the mounting position.
b) Unclip the front bezel from the unit and
remove the 2 retaining screws, then remove
the working section from the back box. (see
Fig. 2).
c) Feed the cable through the knock-out hole
in the base of the back box and mark the
fixing point on the wall.
Drill appropriately sized holes at the fixing
points and insert the wall plugs.
Fix the back box on to the wall. (see Fig 3).
d) Plug the data cable into the socket.
(see Fig. 4).
e) Fix the unit back into the back box using
the screws supplied, then clip the bezel back
on the unit again noting which way is up.
(Top is printed on the inside face of the bezel
and and middle section). (see Fig. 5).
2.0 Data Cable Installation
A 4-core SE V data cable is used to connect
the control to the fan.
Do not run data cable in the same conduit
as the mains cables and ensure there is a
50mm separation between the data cable
and other cables.
For cable lengths in excess of 10m a
MRXBOX-JB will be required to provide
sufficient power. eep the number of cable
joints to a minimum to ensure the best data
transmission efficiency between devices.

3.0 Operating MRXBOX-VSC
Using the Visual display screen will override any unit mounted
controls.
3.1 The Home Screen
3.2 The Settings Screen
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Installation and Operating Instructions MRXBOX-VSC User Control
09. 03. 16. eaflet Number 671703
Commissioning screens –
for systems set up.
PIN controlled
Maintenance – used to
reset filter change time
User Options
Access for User Guide
Diagnostics - used in the
event of a fault
Status Indication
Speed Indicator/
Adjustment
Outside Temperature
Filter Change Warning
Average Indoor
Temperature
Access to Function
Screens
Time

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Installation and Operating Instructions MRXBOX-VSC User Control
4.0 User Options Screen
4.1 Night Time Mode
Night Mode – Allows you to set the ventilation system to run at
a minimum level at night. Adjustable between 4 and 8 hrs.
This feature can also be de-selected from this screen when in
operation.
4.2 Date and Time
Time – Should be set on commissioning to ensure filter reminder
is accurate.
4.3 Timed Boost
Timed boost – Allows you to adjust the time the ventilation
system boosts when the speed setting is changed via the home
screen, this can be set between 1 and 60 minutes. Alternatively
if NONE is selected the unit will stay at the speed chosen
permanently.
Note: The speed of the unit may also be controlled by other
sensors fitted, some of which may have built-in run on
functionality.
4.4 Summer Bypass
Summer Bypass – When the weather is warm outside, the unit will
automatically go into summer bypass mode, meaning the air
coming into your home will not pass through the heat exchanger
in the ventilation unit. This button allows you to manually override
this facility, should you wish the unit to continue to warm the air
coming into your home. It is set at a default 4 hours, but you can
adjust this to a maximum of 12 hours in the User Options.
This feature can also be de-selected from this screen when in
operation.
09. 03. 16. eaflet Number 671703

4.5 Rising Boost
Rising Boost – Allows you to set the ventilation system so that
the speed of the fan increases gradually, instead of going straight
into full boost.
4.6 Holiday Mode
Holiday Mode – Allows you to set the ventilation system to run at
a minimum level while you are away. You can adjust the number of
days you are away for, with a maximum of 21 days.
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Installation and Operating Instructions MRXBOX-VSC User Control
09. 03. 16. eaflet Number 671703

Installation and Operating Instructions MRXBOX-VSC User Control
5.0 Commissioning Screen
Commissioning – This should be carried out with reference to
the ventilation units specific Installation and Maintenance
instructions. By using the MRXBOX-VSC any controls on the front
of the unit will become inoperable. However the requirement to
meet building regulations will not change.
Note: The adhesive backed commissioning label fitted to the
front panel of the ventilation unit should still be applied to seal
the commissioning pot access holes.
5.1 Air Flow
Air Flow – Gives individual control of the supply and extract flow
rates. The commissioning Engineer should follow the requirement
for speed 1 (trickle) and speed 2 (boost) as per Building Regulation
Part F ventilation and detailed in the Installation instructions for
the unit. Speed 3 is for purge ventilation and is recommended to
be set to 100%.
Note: Speed 2 cannot be adjusted to a lower value than speed 1.
5.2 Frost Protection
Frost Protection – In the event of the outdoor temperature falling
below a set rate to unit reduces the supply fan speed down to a
minimum to prevent the unit freezing. The default temperature for
frost protection to activate is -5 Deg C. This can be raised to a
maximum of 0 Deg C if required.
Note: this function can be disabled for 8 hours to assist
commissioning.
5.3 Summer Bypass (where fitted)
Summer Bypass – The ventilation unit uses this feature to try and
maintain a set temperature in the household. By default this is
25 Deg C although this figure can be adjusted between 15 and 30
Deg C if desired.
Note: this function can be disabled for 8 hours to assist
commissioning.
509. 03. 16. eaflet Number 671703

5.4 Humidity (where fitted)
Humidity – The unit monitors the humidity level of the whole
property and boosts the unit if the level exceeds the set point.
It is recommended to set the relative humidity to 70%.
5.5 Run-Time
Run-Time – This shows the duration the unit has been On
and Off, this is calculated from the point the unit has been
commissioned and run continuously for 12 hours.
5.6 Change Pin
Change Pin – Used to enter a pin code. As a default 1234 is used.
Pin codes are used to prevent the occupant tampering with the
commissioned levels.
6.0 Maintenance
Maintenance – After a pre-determined length of time the unit will
display an icon on the home screen indicating that the filters
should be changed, when this task has been completed the feature
can be reset from the maintenance screen to clear the icon.
Instructions on how to complete this task can also be found on
this screen.
7.0 Diagnostics
Diagnostics – If a fault is suspected the diagnostics screen can be
accessed to view the status of the unit controls, a cross indicates
an issue.
In the case that the communication is lost to the unit a ? will be
shown against all other features. If the unit has gone into failure
mode it may be necessary the unit is switched off for 30 seconds
and then turned back on to re-access the status of the controls.
Note: In the case of fault only qualified persons should undertake
any investigation or corrective actions, please refer to the
ventilation units specific Installation and Maintenance document
for information and guidance.
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Installation and Operating Instructions MRXBOX-VSC User Control
09. 03. 16. eaflet Number 671703

8.0 Dimensions (mm)
Unit Dimensions A B C D EF
145 85 35 6 73 57
9.0 Warranty
The 5 year warranty commences on the day of delivery and
includes parts and labour for the first year.
The remaining period covers replacement parts only.
The labour content is subject to full, free and safe access to the
equipment as recommended by the CDM regulations.
The warranty excludes any damage to the CD touch screen
caused by misuse of a sharp object.
10.0 Service Enquiries
Nuaire can assist you in all aspects of service. Our Technical
Support Department will be happy to provide any assistance
required.
Technical Support
on 029 2085 8400
11.0 Compatibility with Ecosmart Fans
The MRXBOX-VSC controller is 100% compatible with the
Ecosmart fans and air handling units supplied with the controller.
However, some other products may not be so.
Please check the suitability of the fan unit before upgrading the
existing user control to the MRXBOX-VSC controller.
To check if the fan is suitable for upgrade, please contact Nuaire
with detail of the fan code and the serial number printed on the
rating label.
12.0 User Guide
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Installation and Operating Instructions MRXBOX-VSC User Control
09. 03. 16. eaflet Number 671703
Technical or commercial considerations may, from time to time, make it necessary to alter the design, performance and
dimensions of equipment and the right is reserved to make such changes without prior notice.
Note: This unit contains a
small lithium battery and
must be disposed of by a
suitable recycling centre.
Do not dispose of with
normal household waste.
Do not burn.
A
C= Surface
mounting
depth
B
E = Screen
width
F = Screen
depth
D= Recessed
mounting
depth

809. 03. 16. eaflet Number 671703
NUAIRE LIMITED
Western Industrial Estate | Caerphilly | CF83 1NA
t+44 (0)29 2085 8400 | f+44 (0)29 2085 8444 | [e-mail]
www.nuaire.co.uk
As part of our policy of continuous product development Nuaire reserves the right to alter specifications without prior notice.
Telephone calls may be recorded for quality and training purposes.