NuAire MRXBOX95B-WHIH Installation And Maintenance Manual Download Page 4

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21. 06. 13. Leaflet Number 671599

Installation and Maintenance

MRXBOX95B-WH1H Mechanical Ventilation with Heat Recovery & Summer Bypass

4.0 Ducting arrangements 

Air supply to lounge 
via Air Valve 
(Part no. V150S) 
in ceilings.

Extract air from 
kitchen/bathroom 
via Air Valve 
(Part no. V150S) 
in ceilings.

Minimum 
300mm

Exhaust air from 
kitchen/bathroom to 
outside via louvre grille
(Part no. PVC604).

Intake air 
from outside
via louvre grille
(Part no. PVC604).

Supply duct only 
from external 
grille to the unit 
needs to be insulated.

Exhaust air from 
kitchen/bathroom to 
outside via air brick
(Part no. PVC501).

Intake air 
from outside
via air brick
(Part no. PVC501).

Supply duct only 
from external 
air brick to the unit 
needs to be insulated.

Insulated 
supply duct.

Insulated 
supply duct.

Minimum 
300mm

Air supply to lounge 
via Air Valve 
(Part no. V125S) 
in ceilings.

Extract air from 
kitchen/bathroom 
via Air Valve 
(Part no. V125S) 
in ceilings.

Air supply to 
bedrooms 
via Air Valve 
(Part no. V125S) 
in ceilings.

Top of ceiling void.

Top of ceiling void.

Nuaire 
MRXBOX95B-WH1H 
wall mounted 
unit on a patress.

Air supply to 
bedrooms 
via Air Valve 
(Part no. V150S) 
in ceilings.

Nuaire 
MRXBOX95B-WH1H 
wall mounted 
unit on a patress.

MVHR-DRAIN
Condensate drain, uninsulated 
drain pipe with 10  fall running to SVP.

MVHR-DRAIN
Condensate drain, uninsulated 
drain pipe with 10  fall running to SVP.

o

o

Figure 7a. Typical ducted arrangement for a wall mounted unit using 150mm dia. ducting.

Figure 7b. Typical ducted arrangement for a wall mounted unit using rectangular 204 x 60mm ducting.

ALSO FROM NUAIRE - 

New

range of thermal ducting,

an all-in-one insulated ducting system. 

(see installation document 671620).

Summary of Contents for MRXBOX95B-WHIH

Page 1: ...around the installed unit to allow the cover to be removed and provide sufficient access for maintenance such as filter change Please allow a minimum of 250mm in front of the unit The fan must be ins...

Page 2: ...le valve types not supplied External grilles to have a minimum free area of 12 250 sq mm 2 3 Ducting Before commencing ducting installation reference should be made to building regulations document Do...

Page 3: ...boost should be at least the greater of step 1 and step 2 Note that the maximum individual room extract rate should be at least those given in table 1 for minimum high rate the minimum air supply rat...

Page 4: ...ted supply duct Insulated supply duct Minimum 300mm Air supply to lounge via Air Valve Part no V125S in ceilings Extract air from kitchen bathroom via Air Valve Part no V125S in ceilings Air supply to...

Page 5: ...Pole isolator 3 Pole isolator Kitchen switch Kitchen switch Blue Brown Black Optional summer boost switch Supply cord from unit Green yellow Blue Brown Black Supply cord from unit Optional summer boo...

Page 6: ...t has to ability to override both the trickle and boost speeds to operate the fan to maximum airflow See wiring diagram for details of operating this facility 6 2 Humidity adjustment This product cont...

Page 7: ...COMMISSIONING REQUIREMENTS 6 1 General pre commissioning checks relevant to safe operation consist of the following Ensure that no foreign bodies are present within the fan or casing Check electrical...

Page 8: ...ings 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 Custome...

Page 9: ...r 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 an...

Page 10: ...y 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 Hav...

Page 11: ...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 pro...

Page 12: ...tion 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 Se...

Page 13: ...e 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...

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