GREENWOOD CMEV-3 Installation guide

Brand: GREENWOOD

Model: CMEV-3

Type: Installation guide

CMEV-3

Continuous Running Ventilation System

Installation Instructions

1- General Information

1.1CMEV-3 continuous running mechanical extract ventilation system, ensures constant ventilation throughout the home

The MEV system is designed to be installed in reduced spaces, and exhausts the stale air via the extract grilles sited

remotely to the main unit.

The CMEV-3 delivers 30 m3/h through three possible 80 mm connections and one 45 m3/h to 135 m3/h through 125 mm

connection.

It is recommended to use passive self-regulating air inlets in the habitable rooms of the dwelling with this apparatus, to

ensure that sufficient replacement air is provided.

1.2 Installation shall be in accordance with the following:

Building Standards (Scotland) (Consolidation) Regulations.

Building Regulations.

Institute of Electrical Engineering (I.E.E) Regulations.

Note: In order to conform to the above regulations, it may be necessary to fit fire dampers or other suitable

devices.

1.3 The Design, Material selection and Installation must only be carried out by competent ventilation engineers.

1.4 Ancillary Equipment

Remote fan speed setting switch; a range of internal / external Grilles, external cowls, ducting.

2 Installations

IMPORTANT: Ensure that flue gasses from fuel-burning equipment are not drawn into a living area. If any room from

which air is extracted contains a fuel burning appliance, such as a central heating boiler, then its flue must be of the room

sealed or balanced flue type, or allowance must be made for an adequate supply of air into the room.

2.1 POSITIONING: (Refer to Fig.1)

2.1.1 The unit should ideally be installed in the roof space, or, if this is not practical, in a heated area such as

the false ceiling of a WC, airing cupboard etc...

2.1.2 Where possible, the unit should not be installed so that it is directly above a bedroom, living room, or in an

area that is part of a living area or bedroom.

2.1.3 Consideration must be given to access for servicing of the fan.

2.2 MOUNTING: The unit is supplied with four anti-vibration mountings to provide noise attenuation, through holes to

allow the 4 fixing screw supplied to secure the unit. Make sure the 4 screws are fully secured.

The unit can be mounted in any position to wall, partition or directly to rafters. In the latter case allows for additional cross

support if the distance is greater than the fixing support dimensions.

2.3 Duct and duct connections, (refer to Fig. 1)

2.3.1Two 125mm and Three (2 + 1 optional) 80 mm nominal diameter spigots are provided for the connection of

the ducting. These are clearly marked for correct connection of the extract and exhaust ducts. Flexible duct fits

over the spigots and must be secured with correct jubilee clips, whilst rigid duct fits into the spigots.

2.3.2. in applications where there are more than two extract points; a collector box should be connected to the

unit with a short length of flexible duct.

2.3.3 the duct layout must be designed to suit the requirements of the MEV system and building

Layout, and the protection of fire being transmitted through the ducting by means of suitable fire dampers.

2.3.4 Where rigid duct is used, it should be installed using the least number of fittings to minimize the air flow

resistance. Where possible, final connection to the grilles and the unit should be made with a flexible

connection.

2.3.5Where flexible ducts are used, ensure that:

a. Lengths of ducting longer than necessary are not used.

b. The duct is pulled taught so that it is smooth and straight.

c. Where bends are necessary, they have large radii - avoid sharp bends.

d. Where duct is run in restricted areas, the duct is not crushed.

2.3.6 Kitchen extracts must be filtered.

2.4 ELECTRICAL: (refer to Fig. 3)

WARNING: THESE APPLIANCES MUST BE EARTHED, AND ALL WIRING MUST BE TO CURRENT I.E.E.

REGULATIONS.

2.4.1 The unit is suitable for a 230V~50Hz single phase supply fused at 3A.

2.4.2 The unit is provided with a terminal strip for connection of the electrical supply cable. The terminals are

clearly marked ‘LIVE’, ‘NEUTRAL’ and ‘EARTH’.

2.4.3 The electrical cable must be 0.75mm2 twin and earth, E.C.C.6242Y to BS 6004, clipped and wired in

accordance with I.E.E. regulations (current edition).

2.4.4 A fused spur box, or double pole switch having a minimum contact separation of 3mm, must be used for

isolation of the unit.

2.4.5 Fan speed is controlled by the fan speed control switch (supplied loose and purpose made to fit a

standard single gang deep socket outlet box,

2.4.6 Location for the switch is remote from the unit, and the control is ideally suited for location in the kitchen

adjacent to the cooker.

2.4.7 the cable from the fused spur to the unit, and from the switch to the unit must be flat twin and earth as

detailed in Section 2.4.3.

2.5 INSTALLATION NOTES FOR FAN SPEED SWITCH:

2.5.1 If the switch is to be secured to a plastic mounting box, the design of the box must totally enclose the

fixing screws and thus prevent them from contacting functional insulation.

2.5.2 The switch must not be mounted above, or closer than 1m to, the cooker where it could be affected by

Excessive heat and/or moisture.

2.5.3 If the switch is to be fitted into a surface mounted control box, the box must not be mounted on a

conductive unearthed metal panel or decorative tile and must include a suitable earth terminal for terminating

the cable.

2.5.4 The means of disconnecting the switch from the supply must have a contact separation of at least 3mm at

all poles and be incorporated in the fixed wiring.

3 Commissioning

3.1 The units operate by extracting hot stale air from kitchens, WCs, bathrooms etc.,

3.2 When the unit is set up and running, the minimum setting on the switch must relate to the designed volume air flow.

The volume air flow from minimum to maximum allows the unit to extract a greater volume to cope with any

increase in the build up of condensation or foul air, i.e. cooking etc.

3.3 Before commencing the commissioning procedure, refer to the design drawing for correct air flows.

3.4 COMMISSIONING PROCEDURE:.

3.4.1 Turn the electrical supply ON, and set the fan speed control to ‘NORMAL’.

3.4.2 Check the airflows at the grilles to ensure that desired airflow is delivered,

3.4.3 Set the fan speed control to ‘BOOST’ and ensure that the airflow increases from the kitchen grille.

4 Servicing

IMPORTANT: Before commencing any servicing, ensure the electrical supply to the unit is isolated.

4.1 ROUTINE MAINTENANCE: Cleaning of the extract grilles is required annually. Filters on kitchen extract may require

cleaning more frequently (see User Instructions).

4.2 FAN ASSEMBLIES:

4.2.1 Remove the 4 x screws securing the lid. Remove the lid, taking care to avoid causing damage to the

gasket.

4.2.2 Disconnect the electrical connections to the fans.

4.2.3 Unscrew the 4 x screws securing the fan and remove the fan.

4.2.4 Remove all dust etc., from the impeller and the motor, taking care to avoid disturbing the balance of the

motor and impeller assembly.

4.2.5 Re-fitment or replacement is in reverse order.

4.4 SYSTEM MAINTENANCE:

4.4.1 Clean the filter in the kitchen extract grille, if fitted, by washing in a soap solution.

4.5 CONTROLS CHECK:

4.5.1 Switch on the electrical supply and check that fans operate.

Note: If the fans fail to operate, there may be a fault in either the switch. In which case, you should proceed to

replace as detailed in sections 4.6.

4.5.2 Turn switch to “BOOST” and check that fan speeds increases from the kitchen grille.

4.5.3 Turn switch to “NORMAL” and check that the fans speed slows.

4.6 SWITCH REPLACEMENT:

4.6.1 Remove the switch (2 x fixing screws).

4.6.2 Disconnect the leads at the rear of the switch.

4.6.3 Replacement is in reverse order.

The Guarantee

Greenwood Air Management Ltd Brookside Industrial Estate, Rustington, West Sussex BN16 3LH.

Tel: (01903) 771021 Fax: (01903) 782398 Web: www.greenwood.co.uk Email: info@greenwood.co.uk

All information believed to be correct at the time of going to press. All goods are sold according to Greenwood Air Management Ltd’s standard condition

of sales that are available on request. All dimensions in millimeters unless otherwise shown. Greenwood Air Management reserves the right to change

specifications and prices without prior notice. Registered trademarks and patents protect greenwood products.

For further information, please contact Greenwood Customer Services on:

01903 777135

05.10.340 September 2003

The Guarantee Period

This Greenwood product (CMEV.3) is guaranteed for a period of 2 years from the date of purchase of the Product against fault in manufacture. In case of such

fault in manufacture apparent during the Guarantee Period, Greenwood may, at its absolute discretion, repair the product, replace the product free of charge or

refund the cost of the product AS LONG AS AND ONLY IF:

1. The Product is returned to Greenwood within the Guarantee Period with evidence of purchase date:

a. Airvac Select Fans - 2 years

b. Airvac Elite Fans - 5 years

c. Airvac Environmental - 2 years with the exception of:

i. PPI - 5 years

ii. LA/HA Refurb Fans - 5 years

iii. DC Axial Fans - 5 years

d. Airvac Eco Fans - 2 years

e. Airvac Industrial Fans - 2 years

2. The Product has not been misused or handled carelessly or used on an inappropriate voltage supply;

3. Repairs have not been attempted other than by Greenwood’s service staff or authorised dealers; and

4. In Greenwood’s sole discretion, the Product is found to be faulty. If it were not found to be faulty, the Product would be available for collection from the relevant

Greenwood’s premises within one calendar month and if it was not collected, it would be subsequently delivered by Greenwood and a delivery charge will be

made. (the guarantee) This guarantee does not confer any rights other than those expressly set out above and does not cover any claims for consequential loss,

damage or any costs incurred in the replacement of the faulty Product. This Guarantee is offered as an extra benefit and does not affect your statutory right as a

consumer.

GREENWOOD CMEV-3 Installation guide

GREENWOOD CMEV-3 Installation guide

GREENWOOD CMEV-3 Installation guide

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