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11. 02. 20. Document Number  671382

Nuaire | 

Western Industrial Estate 

Caerphilly 

CF83 1NA 

|

 

nuaire.co.uk

MEVDC

Installation Manual

1.2 Important Information

This manual contains important information on the safe and 
appropriate assembly, transport, commissioning, operation, 
maintenance, disassembly and simple troubleshooting of the product.

While the product has been manufactured according to the accepted 
rules of current technology, there is still a danger of personal injury or 
damage to equipment if the following general safety instructions and 
the warnings contained in these instructions are not complied with.

Read these instructions completely and thoroughly before 
working with the product.

Keep these instructions in a location where they are accessible 
to all users at all times.

Always include the operating instructions when you pass the 
product on to third parties.

1.3 Personal Protective Equipment

The following minimum Personal Protective Equipment (PPE) is 
recommended when interacting with Nuaire product:

Protective Steel Toed Shoes - 

when handling heavy objects.

 

Full Finger Gloves (Marigold PU800 or equivalent) - 

when 

handling sheet metal components. 

Semi Fingerless Gloves (Marigold PU3000 3DO or equivalent) 

- when conducting light work on the unit requiring tactile 
dexterity. 

Safety Glasses

 - when conducting any cleaning/cutting operation 

or exchanging filters. 

Reusable Half Mask Respirators 

- when replacing filters which 

have been in contact with normal room or environmental air.

Nuaire would always recommend a site specific risk assessment by a 
competent person to determine if any additional PPE is required. 

2.0 INTRODUCTION

Nuaire's MEV-DC units are designed to provide continuous mechanical 
extract ventilation to homes in accordance with Part F of the Building 
Regulation 2006 & BRE digest 398.

The case is constructed in grey /blue ABS plastic. The full length access 
cover which is located on the underside of the unit, on the opposite 
side to the mounting bracket, is retained by four 1⁄4 turn fasteners. 
This cover is acoustically lined with flame retardant acoustic foam (full 
lining also available).

2.1 Code Description: 

MEV DC - ES R G2 L H D4 

   |       |       |    |    |    |   |    |       

   1      2      3  4   5   6  7  8           

1. Range:   

 

Mechanical Extract Ventilation

2. Motor Type:  

 

DC Motors

3. Ecosmart Compatibility:

 ES

   

    (optional)
4. Run-On Timer (optional):  

R

5. Filtration (optional):  

G2 or G4

6. Case Lining (optional):  

L

7. Humidistat (optional):

 H

8. Damper Kits (optional):

 

S1, S2, D3 or D4

  

hole.

Fixing screw

Bracket tongues

engage with casing

slots, then unit

rotated up to 

align with fixing 

screw hole.

2 rubber cable 

entry grommets

either side of casing

for external wiring.

Unit Airflow Path

Unit Mounting Bracket

3.0 INSTALLATION

Installation must be carried out by competent personnel in accordance 
with the appropriate authority and conforming to all statutory and 
governing regulations.

The fan must be fitted indoors, away from sources of water spray 
or steam generation. The fan can be installed at any angle using the 
integral mounting bracket supplied (figure 2).

It is assumed that a solid non-reverberant mounting position has been 
selected and the electrical mains wiring and any optional control wires 
have been made ready.

It is also assumed that compatible ductwork is already installed and 
ready to be connected to the 125mm diameter discharge spigot and the 
chosen 100mm, 125mm diameter and/or 110 x 54mm rectangular inlet 
spigots.

The unit is not fitted with a backdraught shutter (when using the 
continuous background vent facility a shutter is not needed). However 
a backdraught shutter is available from Nuaire if required.

An integral fixing bracket with a single bolt fixing allows easy mounting 
and removal of the unit when necessary. The unit is supplied with the 
125mm diameter discharge spigot for fitting during installation. 

3.1 Unit Installation

The integral mounting bracket supplied can be offered up to position, 
the fixing points marked through and the bracket installed with 4 
screws by others (figure 2).

Offer the unit into position and locate the bracket into the slots in the 
case before fixing with the single bracket fixing screw.

Various damper/inlet spigot positions can be utilised as required to 
suit the system ductwork and extract grilles as all spigot positions are 
removable.

After the spigots have been located in their correct position, adjust the 
damper with a screwdriver (figure 4).

Summary of Contents for MEVDC

Page 1: ...vers During installation maintenance ensure all covers are fitted before switching on the mains supply All pole disconnection from the mains as shown in the wiring diagram must be incorporated within the fixed wiring and shall have a minimum contact separation of 3mm in accordance with latest edition of the wiring regulations This unit must be earthed Ducting must be securely fixed with screws to ...

Page 2: ...stic foam full lining also available 2 1 Code Description MEV DC ES R G2 L H D4 1 2 3 4 5 6 7 8 1 Range Mechanical Extract Ventilation 2 Motor Type DC Motors 3 Ecosmart Compatibility ES optional 4 Run On Timer optional R 5 Filtration optional G2 or G4 6 Case Lining optional L 7 Humidistat optional H 8 Damper Kits optional S1 S2 D3 or D4 hole Fixing screw Bracket tongues engage with casing slots th...

Page 3: ...ng following removal of the filter cover A clear space of at least 470 x 320mm is required to allow the cover to be removed and provide sufficient access for maintenance The fan is designed to be wired direct to the mains supply through a fused spur isolator by others and run continuously in the NORMAL mode which is the low speed background or trickle ventilation setting with occasional BOOST airf...

Page 4: ...can be found on the base of the fan case The adjustment dial gives a range of 50 80 20 C figure 9 Setting to mid position gives 65 which should be acceptable for most circumstances If the unit boosts at unacceptable times this dial should be turned clockwise by a small amount 3 5 3 Unit Serving Bathroom 3 6 Humidistat Adjustment 3 5 2 Unit Serving Bathroom N L SL Do not use To OPUS SPD speed contr...

Page 5: ...s nuaire co uk 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 IMPORTANT The unit must not be switched off this product is designed to run continuously 4 0 OPERATION 4 1 Speed Control To control the flow rate of air the unit is equipped with...

Page 6: ...s for the equipment are adhered to e g operational air temperature air borne contaminants and unit orientation 4 2 Where installation accessories are supplied with the specified equipment e g wall mounting brackets They are to be used to support the equipment only Other system components must have separate provision for support 4 3 Flanges and connection spigots are provided for the purpose of joi...

Page 7: ...7 11 02 20 Document Number 671382 Nuaire Western Industrial Estate Caerphilly CF83 1NA nuaire co uk MEVDC Installation Manual ...

Page 8: ...8 11 02 20 Document Number 671382 Nuaire Western Industrial Estate Caerphilly CF83 1NA nuaire co uk MEVDC Installation Manual ...

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