You are about to install a product that is designed to outlast the life-cycle of the building.
Once installed the unit will operate continuously for 5 years and beyond without a major
service. Please therefore ensure that this product is treated with care and installed properly
i.e. for the life of the building. If the unit is mishandled you might break it! This invalidates
the warranty.
And remember, if you have any problems please call our dedicated Technical Team. We
are always pleased to help and in an emergency will come out to site quickly, completely
free of charge.
HOTLINE: 0845 27 27 810
Due to our policy of continuous innovation and improvement EnviroVent reserves the right to alter
products specification and appearance without notice.
MEV Spider
ABOUT THE UNIT
The EnviroVent MEV Spider is a low-energy, continuous
mechanical extract ventilation system designed with
multiple extract points to simultaneously draw moistureladen air out of the wet rooms, whilst minimising the
migration of humidity to other rooms. The extract unit
is centrally located in, for example, a hallway cupboard,
with ducts running from the unit to the kitchen,
bathroom, en-suite and other wet zones.
Ideal for use in mid-sized houses up to 220m³ and
apartments of up to 180m³, the unit provides high
centrifugal performance with low running noise. Highly
cost effective and value for money, the MEV Spider
provides the added confidence of inclusion within SAP
Appendix Q and comes with a full five year guarantee.
MEV Spider
EXPLODED VIEW
Electronics cover
Electronics
Lid
Fan scroll
Fan
Acoustic foam
Back box
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MEV Spider
INSTALLATION INSTRUCTIONS
IMPORTANT
SAFETY AND RECOMMENDATIONS
Be sure to have read and understood these instructions
before beginning the installation process.
PRE-INSTALLATION CHECK LIST
All wiring must comply with Building Regulations
and the current I.E.E. Wiring Regulations (BS7671)
or the equivalent standards for your country. The
final installation should be examined and tested by a
qualified electrician.
Make sure that the unit can physically fit in to the
desired location.
Make sure the mains supply complies with the rating
label for voltage, frequency and phase.
The MEV Spider unit should be situated so that access
for maintenance is possible. Make the ductwork runs
as short as possible. Having the most direct route and
using as few bends as possible will reduce air resistance
and improve the efficiency of the unit.
For guidance on good installation practice for MEV
systems see the latest addition of the Domestic
Ventilation Compliance Guide.
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MEV Spider
What’s in the box
Box
Item
Number of items
MEV Spider Unit
1x
100mm Spigot
3x
Image
Remote control
Boost Swtich
1x
Foam Pad
4x
Screw
4x
Penny Washer
4x
Wall Plug
4x
Mounting Template
1x
Rivet
6x
Fixing KIt
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Hard wired version
MEV Spider
INSTALLATION INSTRUCTIONS
FIRST FIX
1. Ductwork within house - use Ø100mm (Ø80mm EU standard) or 204x60mm ducting (insulated in unheated
spaces).
2. Power to the unit - locate a 3 Amp fused spur within 1m of the unit.
SECOND FIX
1. Remove 4 screws on the lid. (Fig. 1)
3. Use the template provided to mark fixing holes,
ensuring clearance around the MEV unit. (Fig. 3a)
Drill 4 x Ø6mm holes, position plugs in the wall and
foam mounts on the back of the unit’s metal casing
(Fig. 3b & 4).
Fig.1
2. Remove the lid. (Fig. 2).
Fig.3a
Fig.2
Fig.3b
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MEV Spider
INSTALLATION INSTRUCTIONS
SECOND FIX CONT.
4. Secure the MEV unit with four screws as per the
diagram. (Fig. 4)
Screw
Washer
Back Box
Fig.4
10.Commission the unit. See Commissioning of a
continuous ventilation system, page 9.
11.Additional settings - for additional unit settings
including altering the boost run on time and pairing
of additional RF switches see ‘Board settings’ on
page 10. For wiring of PIR devices see separate
supplementary sheet.
Wall Plug
Self Adhesive
Foam Pad
Wall / Ceiling
5. Put the lid on. (Fig. 5)
Fig.5
6. Tighten 4 screws to fix the lid in place. (Fig. 5)
7. Extract valve - position a dustsheet beneath the
site you have chosen for cutting the diffuser hole.
Protect your lungs with a mask. Check there are
no obstructions to your chosen position for the
diffuser. Cut a Ø105 hole. Connect the ducting onto
the neck of the diffuser. Fix the diffuser in position
using plasterboard plugs and screws, remember to
adjust the vent opening.
8. Connect the ducting to the MEV, see ‘Connecting
the ductwork’, on the next page.
9. Connect to the mains through the spur.
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MEV Spider
CONNECTING THE DUCTWORK
Ø100
1. Ø100 Spigots (3 supplied)
3. Apply sealant under the spigot. Screw on the spigot
so that the holes align. Push in plastic rivets.
2. With a sharp knife cut though the internal gasket
using the spigot slot as a guide, then twist out the
metal blank.
4. Slide on pipe, ensuring that ‘O’ rings are in place.
Wiring Diagram
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MEV Spider
COMMISSIONING
Commissioning of a continuous running ventilation system
Commissioning of the system is necessary to provide
adequate ventilation to the dwelling, as stipulated in
Approved Document F (ADF) of the building
regulations*
For guidance on good installation practice for
MEV systems see the:
Domestic Ventilation Compliance Guide*
This guide provides in depth information on all aspects
of installation, inspection, testing and commissioning.
Conditions- all maintenance and development works
should be completed prior to the commissioning of the
unit, this is to avoid high levels of dust being drawn into
the system and general disturbance to the setup. The
unit should only be commissioned when fully installed,
with power, ductwork, valves and vents in place.
Equipment required- Anemometer which is capable
of measuring l/s or m³/hr.
Commissioning method- Once the previous
conditions are met, boost and trickle rates need
to be set. These should be set as outlined in the
commissioning guide.
Commissioning guide
Boost rate (minimum high rate)
•
Determine the whole building ventilation rate.
See ADF of the building regulations.
•
Switch the unit to boost (ensure that the unit
stays on boost, typical run on time is 15mins)
•
Open ceiling/ wall valves.
•
Measure all extract points summing the individual
room rates. Measurements to be carried out with
an appropriate anemometer.
•
Adjust multi turn potentiometer on the control
PCB, up or down, until the total extract rate is
met. Clockwise to increase. See RV2.
•
When the desired overall extract rate is achieved,
the individual valves should then be adjusted to
draw the appropriate volume of air from each
room, typically starting with the largest extract
requirement first: kitchen, bathroom, utility room,
en-suite and WC.
•
It may be necessary to adjust the fan unit slightly
to account for increased pressured.
•
When adjustments are completed the valves
should be locked into position to maintain
settings.
Trickle rate
•
This should be set around 75% of the Boost rate.
See ADF of the building regulations.
•
Ensure that the unit is no longer running at its
high rate.
•
As the valves have been commissioned at boost
they will not need to be altered further, the trickle
multi turn potentiometer should be adjusted
up or down, until the lower extract rate is met.
Clockwise to increase. See RV1
RV1
RV2
The control board is located under the round black
cover on the front of the unit.
It is recommended that the system is commissioned in conjunction with a system design provided
by EnviroVent Ltd.
* Applicable in England and Wales. For other countries, please refer to your local building regulations.
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9
MEV Spider
CONNECTING THE DUCTWORK
! Any adjustments to this board should be carried out by a qualified installer.
Manual Boost
! Power supply.
Do not touch
at any time.
Boost Reset Button
SW2
off
on
+0 minute boost time
1
+1 minute boost time
+0 minute boost time
2
+2 minutes boost time
+0 minute boost time
3
+4 minutes boost time
+0 minute boost time
4
+8 minutes boost time
+0 minute boost time
5
+16 minutes boost time
+0 minute boost time
6
+32 minutes boost time
The time is a binary switch. If all switches
are set to off no boost is possible.
Power In
RV1 Trickle
RV2 Boost
Fig. 1
SW2 Timer settings
Programming of an additional remote control boost switch
1.
Locate the RF receiver board by removing the
green lid, the board is inside the black box fixed
to the underneath of the lid. (Fig. 2)
2.
Hold down button ‘A’ (5 seconds) until the
adjacent Red LED begins to flash and let go of
button. (Fig. 3)
3.
Press the switch BOOST button, (Fig. 4) and the
switch LED’s will flash from red to green. The RF
switch is now linked.
4.
Press the Boost switch again and this will send
the unit into boost mode for the unit’s specified
boost time.
5.
Repeat steps 2 and 3 for more switches to be
programmed.
6.
To clear all programmed switches hold down
button ‘A’ until red LED flashes rapidly (Approx
20 seconds).
7.
Fig. 2
Fig. 4
A
To reset the unit back to trickle from boost, press
the reset button on the control board. (Fig. 1)
N.B. When batteries require changing, unscrew the
switch front cover. The battery is located on the
back of the cover. [Requires CR2032 3V battery]
Fig. 3
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10
MEV Spider
MAINTENANCE
There are no special requirements for any maintenance
within a five year period. The unit is easy to clean by
simply removing the lid. After carrying out work, make
sure all the screws are in place.
Cleaning
! Isolate the unit from electrical mains supply before removing any cover, or servicing the unit
1. Remove 4 screws on top of the lid. (Fig.1)
3. Put the lid on. (Fig. 3)
2. Remove the lid and carefully lower, the lid remains
attached to the unit with cabling (Fig. 2)
4. Tighten 4 screws to fix the lid in place. (Fig. 4)
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11
MEV Spider
TECHNICAL SPECIFICATIONS
Supply Voltage
230V / 50Hz
Dimensions (w x h x d) mm
Duct Diameters (mm)
Energy Saving
Trust Saving Practice
Performance Compliant
Ø80; Ø100; Ø125; (204x60; 110x54)
Configuration
(WR-Wet Room)
Flow Rate (l/s)
SFP (W/l/s)
Kitchen + 1 WR
21.0
0.45
Yes
Kitchen + 2 WR
29.0
0.34
Yes
Kitchen + 3 WR
37.0
0.33
Yes
Kitchen + 4 WR
45.0
0.34
Yes
Kitchen + 5 WR
53.0
0.37
Yes
Kitchen + 6 WR
61.0
0.40
Yes
Static Pressure (Pa)
Efficiency
40 x 195 x 360
Airflow (l/s)
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12
MEV Spider
Warranty CONDITIONS AND EXCLUSIONS
The EnviroVent MEV Spider is covered by a 5 year warranty which will benefit the occupier over many
years. The unit will be set according to the size of the property and will operate continuously. There is no
requirement for any maintenance within the 5 year period.
Please note that proof of purchase by the way of a receipt is required and that any fans bought from an
unapproved source, including but not limited to Ebay, will render the guarantee invalid.
What should I do if I have a problem?
If, after thoroughly reading this booklet, you feel that your unit is not working correctly, you can
telephone the number shown at the bottom of this page (operational from 8:30am to 5:00pm Monday
to Friday), and ask for technical assistance. You will either be given guidance over the telephone, or an
arrangement will be made for an engineer to visit. In any event, please have the following information
ready. This will enable your call to be dealt with quickly and efficiently.
Serial number of the unit
We appreciate you choosing this quality EnviroVent product, which is designed and manufactured to
the highest specification in Harrogate, North Yorkshire. We are confident that you will be delighted
with the performance of the system and the resulting improvement in air quality in your home after the
installation of the unit.
Your warranty covers any defect or break down that arises due to faulty materials or construction.
Terms of Warranty
• The system must be correctly installed and operated according to the instructions contained in the
user guide supplied.
• Periodic cleaning and maintenance must be carried out by a technically competent person.
• The warranty will be rendered invalid if the unit is turned off. Turning the unit off can damage it.
• The warranty does not cover accidental damage, misuse or abuse.
• The warranty is in addition to your statutory or legal rights.
• The warranty will only be honoured from approved suppliers.
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Please read carefully to ensure simple installation and a
long trouble free life for the user.
AFTER INSTALLING THIS FAN PLEASE PASS ONTO END USER - DO NOT THROW AWAY
EnviroVent Ltd
EnviroVent House
Hornbeam Business Park
Harrogate
HG2 8PA
T 01423 810 810
F 01423 810 910
E info@envirovent.com
www.envirovent.com
E&OE | MKT ENV230-V4-28.03.14
Due to our policy of continuous innovation and
improvement EnviroVent reserves the right to
alter products specification and appearance
without notice.