envirovent ECO DMEV Centrifugal Extract Fan Instruction Manual
- June 5, 2024
- envirovent
Table of Contents
envirovent ECO DMEV Centrifugal Extract Fan
ECO dMEV Centrifugal Extract Fan
The ECO dMEV extract fan range is manufactured to the highest standards of
production and quality as laid down by the International Quality Standard ISO
9001. All components have been checked and every one of the final products will
have been individually tested at the end of the manufacturing process.
On receipt of the product we recommend that you to check the following:
- That it is the correct model.
- That the details on the rating label are those you require: voltage, frequency…
The installation must be carried out in accordance with Building Regulations and the current I.E.E. wiring regulations (BS7671) or the equivalent standards in force in your country. This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning the use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.
INSTALLATION
IMPORTANT: Before installing and wiring the unit, ensure that the mains
supply is disconnected.
Fig. 1b
- Front grille
- Protection cover
- Support
- Connection terminals
- Cable entry
- Dip switches
- Potentiometer
- Air filter
The ECO DMEV is suitable for wall or ceiling mounting and can either ex-tract
directly to the outside or through a ducted system (see Fig. 2). Make a Ø105
mm hole in the wall or ceiling. If the unit is to be installed with ducting,
use a standard Ø100 mm duct. Remove the front grille (1) and the protection
cover (2). The unit can be mounted on the wall or ceiling using the 4 raw
plugs and the screws provided. Ensure that there are no obstructions to the
airfl ow and that the impeller turns freely. Introduce the mains cable through
the cable entry (5) and fi x it to the wall. Connect the electrical wiring as
set out below and then mount the protection cover and the front grille.
ELECTRICAL CONNECTION
The ECO dMEV is an extract fan de-signed for a single phase supply, with
voltage and frequency as indicated on the rating plate of the unit. The units
are manufactured with double electrical insulation (Class II) and therefore
they do not need an earth connection. The electrical installation must in-
clude a double pole switch with a con-tact clearance of at least 3 mm.
The electrical cable must enter the ECO dMEV through the cable entry (5). Once
the cable has been introduced proceed using the electrical wiring diagram
applicable to the selected model.
OPERATION
The ECO dMEV is an extract fan designed to operate continuously at low speed and constant volume. The constant fl ow setting is made with dip-switches placed on the electronic circuit board (Fig. 1b)
The ECO dMEV may also operate at high speed that is activated by: an ex-ternal
switch live or light switch (S, T and HT versions) an integral humidity sensor
(HT and HTP versions) or an internal pull cord switch (HTP version).
ECO DMEV S
The ECO dMEV S can operate in two modes:
Continuous operation on trickle set-ting only (Fig. 2). 
Once the air vol-ume is set
the fan is connected to the mains and the unit will operate continuously at
this air volume. Continuous operation on trickle with the ability to boost on
high speed. The ECO dMEV is connected to an external switch or light switch.
When the switch is pressed, the fan operates on full speed (not constant)
until the switch is turned off (light off): Fig.4-
Wiring diagram to boost
the fan with the light switch.Fig.5-
Wiring diagram to boost the fan with a separate switch
ECO DMEV T
This model is provided with an adjustable over-run timer. The timer allows the
fan to continue to operate for the selected period after the switch has been
turned off (fi g.5).
Fig.4 shows how to connect the fan with timer by using the same switch as the
lighting circuit to allow the fan to be boosted.
To set the timer, turn the potentiometer “P2” on the printed circuit board as
(fi g. 7).
- Manufacture setting:1 minute
- To reduce the “run on” time, turn anticlockwise (min: 1 minute)
- To increase the “run on” time, turn clockwise (max: 30 minutes).
ECO DMEV HT
Models provided with an electronic humidity sensor which can be ad-justed from 60% to 90 % RH (relative humidity) and with a timer, adjustable between 1 and 30 minutes.
OPERATION
Case 1: Automatic operation (fi g.3).
In automatic operation, the extract fan
operates continuously on the trickle setting speed. When the humidity lev-el
in the room is higher than the set level the fan will boost to high speed.
When the humidity drops below the selected level and after the selected period
set on the timer the fan auto-matically returns to trickle.
Case 2: Automatic operation as in case 1 with the facility to override
the humidity sensor by means of an external switch (fi g.5) or light switch (fi
g.4), when the humidity level in the room is lower than the selected level. In
this case, the extract fan continues to operate for the selected period set on
the timer after the light switch has been turned off.
ATTENTION: When the humidity rate is above the selected value, the auto-
matic option takes precedence over the manual.
SETTINGS
The settings at manufacture are 60%HR for humidity and 1 minute for timer. The desired humidity level is select-ed by means of a potentiometer “P3” positioned on the printed circuit board (fi g.8).
- To increase the relative humidity sensitivity turn anticlockwise (min. 60%).
- To reduce the relative humidity sensitivity turn clockwise (max. 90%).
To set the timer, turn the potentiometer “P2” on the printed circuit board (fi g.8):
- To reduce the “run on” time, turn anticlockwise (min. 1 minute).
- To increase the “run on” time, turn clockwise (max: 30 minutes).
SPECIFIC RECOMMENDATIONS
- If you change the settings of the extract fan you have to handle the potentiometers in the printed circuit board. These potentiometers are fragile and must be handled with care.
- Do not change the setting of the humidity sensor out of the room where the fan will be installed.
- If the humidity is always above 90% RH, the fan will always run at full speed.
- If the humidity in the room is always less than 60%, the fan will only operate on trickle speed when running in automatic operation.
If the fan never runs on boost:
- The setting of the humidity sensor has been set to maximum. Change the setting.
- The level of humidity in the room is below 60% RH.
If the fan always runs at boost:
- The setting of the humidity sen-sor has been set to the minimum. Change the setting.
- The level of humidity in the room is above 90% RH.
ECO DMEV HTP
ECO dMEV version similar to H model, fi tted with a manual pull cord to oper-
ate the boost when the humidity level is below the set point (fi g.6
).
When switching the pull cord off, the fan will continue to operate on boost
for the time set by the timer then will revert to trickle speed, unless the
hu-midity level exceeds the set point.
MAINTENANCE
IMPORTANT: disconnect from the mains supply before carrying out any
maintenance.
The ECO dMEV extract fan is supplied with a plastic fi lter. Performance
depends on cleaning frequency and thus we recommend cleaning, minimum every
two months, in accordance with fi g 1a. The ECO dMEV extract fan must always be
operated with the fi lter fi tted. Using the extract fan without the fi l-ter
invalidates the warranty. The external surface of the fan only requires
periodical cleaning using a cloth lightly impregnated with a soft detergent.
AFTER-SALES SERVICE
We recommend you not to try to dismantle or remove any other parts than those
mentioned as any tampering would automatically cancel the EnviroVent
guarantee. If you de-tect any fault, contact EnviroVent on 01423 810810.
If you have any problems, please call our dedicated Technical Team on 0345 27
27 810.
PUTTING OUT OF SERVICE AND RECYCLING
EEC legislation and our consideration of future generations mean that we should al-ways recycle materials where possible; please do not forget to deposit all packaging in the appro-priate recycling bins. If your device is also labeled with this symbol, please take it to the nearest Waste Manage-ment Plant at the end of its servicable life. EnviroVent reserves the right to alter speci-fi cations without notice.
WARRANTY
The ECO dMEV products are covered by a two year warranty, subject to the
specifi ed maintenance stated within this booklet.
If your fan has been supplied and installed by EnviroVent it is covered with a
full parts and labour warranty. If you detect a fault, please con-tact us on
0345 27 27 810. You will be given guidance over the phone, or an arrangement
may be made for a member of our team to visit (call-out charges may apply if a
fault cannot be identifi ed).
Supply Only
If your fan has been supplied by EnviroVent and installed by a third party, it
is covered by a parts only warranty. If you detect a fault and the product has
been installed in accordance to the fi tting/wiring instruc-tions, relevant
guidance documents and by a competent and qualifi ed person (proof may be
required), please return the product to the place of purchase for a
replacement.
Warranty Conditions & Exclusions
Please note that a receipt will be required as proof of purchase. Fans bought
from an unapproved source, including but not limited to auc-tion websites, are
not covered by the warranty.
- The system must be correctly installed and operated according to the instructions contained in the user guide supplied.
- The warranty will be rendered invalid if the system has been ser-viced, maintained, repaired, taken apart or tampered with by any person not authorized, which in any way contradicts the instruction guide set out by EnviroVent.
- The warranty does not cover accidental damage, misuse or abuse.
- The warranty is in addition to your statutory or legal rights.
EnviroVent Ltd EnviroVent House Hornbeam Business Park Harrogate
Hg2 8PA
01423 810 810
info@envirovent.com
www.envirovent.com
Ref. 9023025208