Nuaire Group BPC MRXBOX95-WM1 Installation And Maintenance Manual Download Page 5

5

09. 06. 16. Leaflet Number 671684

Installation and Maintenance

The WM1 Wall Mounted Range of Units

4.0 Ducting Arrangements - Standard Configuration 

Air supply 
to lounge 
via Air Valve 
in ceilings.

Extract air 
from 
kitchen/
bathroom 
via Air Valve 
in ceilings.

Minimum distance as specified 
in building regulations.

Exhaust air from 
kitchen/bathroom to 
outside via louvre grille.

Intake air 
from outside
via louvre grille.

All duct between MVHR 
unit and atmosphere to 
be insulated*.

Exhaust air from 
kitchen/bathroom to 
outside via air brick.

Intake air 
from outside
via air brick.

All duct between MVHR 
unit and atmosphere to 
be insulated*.

*Insulated 
supply duct.

*Insulated 
supply duct.

Air supply  
to lounge 
via Air Valve 
in ceilings.

Extract 
air from 
kitchen/
bathroom 
via Air Valve 
in ceilings.

Air supply 
to bedrooms 
via Air Valve
in ceilings.

Top of ceiling void.

Top of ceiling void.

Nuaire wall 
mounted unit.

Air supply to 
bedrooms 
via Air Valve 
in ceilings.

Nuaire wall 
mounted unit.

MVHR-DRAIN
Condensate drain, uninsulated 
drain pipe with min 5

o

 fall running to SVP.

MVHR-DRAIN
Condensate drain, uninsulated 
drain pipe with min 5

o

 fall running to SVP.

*Insulated 
extract duct.

*Insulated 
extract duct.

Minimum distance as specified 
in building regulations.

Figure 9a. Typical ducted arrangement for a wall mounted unit using circular ducting.

Figure 9b. Typical ducted arrangement for a wall mounted unit using rectangular ducting.

ALSO FROM NUAIRE - 

New

range of thermal ducting,

an all-in-one insulated ducting system. 

(see installation document 671620).

Summary of Contents for BPC MRXBOX95-WM1

Page 1: ... the pre drilled holes in the bracket and install with screws by others ensuring the interlock side is at the top fig 3 Figure 3 Fixing the mounting bracket to the wall 2 Install the unit on the wall by ensuring the bracket fixed to the rear of the unit interlocks over the wall mounted bracket fig 4 Figure 4 Mounting the unit on the wall mounted bracket Note Care must be taken to ensure the unit i...

Page 2: ...Figure 5 Typical example of a cupboard mounted unit Standard unit fixed to a block work wall Option 2 Wall Mounting If it is not practical to use a solid wall the MVHR unit should be fixed to a stud partition with a 25mm minimum thickness MDF panel solidly fixed behind the plasterboard If fixing to a stud wall the MDF panel should extend width wise over a minimum of 3 vertical studs with centres o...

Page 3: ...pt to a minimum A minimum distance of 300mm between the appliance and any bends in ductwork is recommended Ideally 150mm diameter or 204 x 60mm rectangular ducting should be used Refer to dwelling design drawing figure 9a and 9b on page 5 for further information Ducting joints must be sealed with silicone type sealant and shall be adequately and reliably fixed to the appliance 2 6 Ventilation flow...

Page 4: ...ly as an alternative the purge ventilation provisions given in ADF 2010 can be used where security is not an issue In this case minimum high extract rate for the sanitary accommodation should be omitted from the step 2 calculation Step 3 The required airflow rates are as follows n the maximum whole dwelling extract ventilation rate e g boost should be at least the greater of step 1 and step 2 Note...

Page 5: ...upply duct Air supply to lounge via Air Valve in ceilings Extract air from kitchen bathroom via Air Valve in ceilings Air supply to bedrooms via Air Valve in ceilings Top of ceiling void Top of ceiling void Nuaire wall mounted unit Air supply to bedrooms via Air Valve in ceilings Nuaire wall mounted unit MVHR DRAIN Condensate drain uninsulated drain pipe with min 5o fall running to SVP MVHR DRAIN ...

Page 6: ...ure 10 The IDC plug in connectors are provided for the connection of compatible sensors NOTE Do not run the data cable in the same conduit as the mains cable and leave a 50mm separation with any power cables Fuse 2A MAINS 230V 50Hz Room light Light switch Double Pole N L Fuse 2A MAINS 230V 50Hz Room lights Light switches Double Pole N L 3 Pole isolator 3 Pole isolator Kitchen switch Kitchen switch...

Page 7: ...ngportal gov uk building regulations approved documents partf associated A calibrated moving vane anemometer and hood will be required to carry out commissioning 5 Adjustment valves should be locked in place to prevent further adjustment 6 Once commissioned the home owner tenant should be informed that the unit should not be adjusted as it will have a detrimental effect on the indoor air quality a...

Page 8: ...ectrically competent person When ordering spare parts please quote the serial number of the unit and the ARC number of the purchase if possible This information will be available on the fan label 11 0 Warranty The 5 year warranty starts from the day of delivery and includes parts and labour for the first year and parts only for the remaining 4 years This warranty is conditional on planned maintena...

Page 9: ...lings assessed under The Building Regulations 2010 specifically SAP 2009 and Approved Documents L and F Completion of this document is therefore only required for dwellings assessed by SAP 2005 Customer Details Customer Name Address Telephone Number Date of Installation Name of Lead Contractor Design Project Number It should be noted that this guidance is not intended to replace product manufactur...

Page 10: ...or to overcome particular obstructions If flexible ducting has been used has it been pulled taut to minimise system resistance Has the number of duct bends been minimised to ensure adequate air flow and least resistance Bends should have a minimum radius at least the same as the diameter of the ducting used Refer to Figure 1 if using flexible ducting Have the fans and ducting placed in unheated vo...

Page 11: ...ry unit been fixed to a stable element of the building fabric e g wall or floor using manufacturer recommended supplied fixing brackets Has the condensation drain been fitted and the pipe insulated Have approved acoustic anti vibration mountings been used Note Special attention is needed to avoid transmission and stress to duct joints Has the unit been installed in a position that will permit acce...

Page 12: ... or N A Has the rating label been verified to establish suitability for the installation strategy and whether an earth is required e g voltage class I or II product status Has a local isolator been provided to enable the unit to be isolated for maintenance purposes Has the unit been fused in accordance with its power rating SECTION 2 COMMISSIONING GUIDANCE ...

Page 13: ...ution grilles been locked where possible to minimise unapproved occupant adjustment Figure 3 Ensure all external and internal windows and doors are closed Set fan speed using manufacturer data table Set normal daytime air flow on extract points starting at location furthest from unit Set normal daytime air flow on input points starting at location furthest from unit Step 1 Step 2 Step 3 Step 4 Ste...

Page 14: ...he customer been advised that opening windows is not recommended during normal use in order to ensure the energy efficient operation and performance of the balanced system Has the customer been advised not to seal natural air flows from room to room e g avoid door seals and thick pile carpets Has the customer been advised not to alter settings post commissioning Has the customer been advised to cl...

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