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20. 07. 20. Document Number 671802
Nuaire |
Western Industrial Estate
|
Caerphilly
|
CF83 1NA
|
nuaire.co.uk
MRXBOX-SIL2
/
MRXBOX-FF2
Installation Manual
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9
MRXBOX-FF2
Wall Mounting Bracket
Mounting Silencer Using Bracket
Toggle Clamp
Locking Nut
Fixing Plate
3.2 Installation (First Fix)
3.2.1 MRXBOX-FF2
The First Fix plenum chamber should be fixed (fixings supplied by
others) with the off centre cylindrical cut-outs nearest to the wall the
MVHR unit is to be installed on. A 30mm clearance between the wall
and the rear face of the plenum chamber is required (Figures 1 and 10).
The ceiling of the property will require an appropriate size cut out to
allow the connection to be made when the secondary items are to be
fitted.
3.3 Installation
3.3.1 MRXBOX-SIL2
The unit is designed for mounting on a solid wall, a gypsum block or
stud/plasterboard wall will not suffice. If fixing to a stud wall a piece
of MDF at least 25mm thick should be solidly fixed behind the board,
the MDF panel should ideally run from floor to ceiling but must be a
minimum of 2m. The MDF panel should also extend width wise over a
minimum of three studs with centres no more than 400mm, additional
vertical supports may be required.
For more detailed information on how to mount the unit and structural
requirements please refer to the I&M document supplied with the
MVHR unit.
Please note
that a clear working space is required around the installed
MVHR unit to allow the cover to be removed and provide sufficient
access for maintenance such as a filter change. Please allow a minimum
of 430mm in front of the unit (continued overleaf).
The below information regarding the angle brackets is only
relevant when the installation includes both a MRXBOX-SIL2 and
MRXBOX-FF2, if this is not the case the MVHR unit should be fitted
using the standard installation instructions supplied with that
product. If only fitting an MRXBOX-SIL2 this should then be sat on
top of the MVHR unit and clamped in place as detailed later in this
section.
If fitting in conjunction with a MRXBOX-AV2 follow the installation
instructions with that product. A MRXBOX-AV2 cannot be used if
fitting both a MRXBOX-SIL2 and MRXBOX-FF2.
The wall mounting brackets and angle bracket (7713046) should now
be fitted (fixings supplied by others) according to the installed position
of the plenum and the measurements shown in Figure 9.
MRXBOX-SIL2 to be hung on the wall using mounting bracket supplied
loose in the MVHR unit packaging, see below.
The MVHR unit can then be sat on the angle brackets and the cross
brace should be fitted using the M5 fixings provided, once the unit is in
position.
Adjustable Foot
Angle Bracket
Locking Nut
Raise the units using the adjustment feet provided until the
MRXBOX-SIL2 is lifted off its wall mounting bracket, ensuring the two
sections are correctly aligned and fasten the toggle clamps on the
sides of the units. The safety pins supplied should be fitted to secure
the clamps in place (Figure 7). Continue to raise the units using the
adjustment feet again checking for good alignment to form a seal
against the MRXBOX-FF2 and ensure installation is level.
When positioning is complete the adjustment feet should be secured in
position using the four locking nuts (Figure 8).
Please note
the above method is the preferred installation
arrangement, a minimum gap of 75mm either side of the unit is advised
to allow access to the toggle clamps.
If space constraints do not allow this, the toggle clamps can be replaced
with the metal fixing plates provided (Figure 9). The MVHR unit and
MRXBOX-SIL2 will need to be secured together and lifted as one
assembly using suitable lifting equipment.
