Monsoon MON-MEVDC400 User manual

Full instructions are available online by scanning the QR code or by
visiting:
https://www.nationalventilation.co.uk/monsoon-domestic-energysaver-range/mev-energysaver-
systems/
PLEASE READ THIS QUICK START GUIDE IN CONJUNCTION WITH THE
ILLUSTRATIONS.
PLEASE SAVE THIS QUICK START GUIDE
IPX2
Quick Start Guide
MON-MEVDC400
MON-MEVDCH400
Multi Room Unit
Continuous Running Mechanical
Extract Ventilation
220-240V~50Hz

2
Installation and Wiring Instructions for the Multi Room Extract Units.
IMPORTANT:
READ THESE INSTRUCTIONS BEFORE COMMENCING THE INSTALLATION
 Do not install this product in areas where the following may be present or occur:
 Excessive oil or a grease laden atmosphere.
 Corrosive or flammable gases, liquids or
vapours.
 Subject to direct water spray from hoses.
 Ambient temperatures higher than 40°C
and lower than -20°C.
 Possible obstructions that may hinder
access to or removal of the unit.
 All wiring must be in accordance with the current IEE wiring regulations BS7671, or appropriate standards
of your country. Installation should be inspected and tested by a suitably qualified person after
completion.
 Ensure the mains supply (voltage, frequency and phase) complies with the rating label.
 The unit should be provided with a local double pole fused spur fitted with a 3A fuse having a contact
separation of at least 3mm.
 This appliance incorporates an earth connection for functional purposes only
 Precautions must be taken to avoid the back-flow of gases into the building from the open flue of gas or
other fuel-burning appliances.
 This appliance is not intended for use by persons (including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for their safety.
 Young children should be supervised to ensure that they do not play with the appliance.
 Cleaning and user maintenance shall not be made by children
 The installer is responsible for the installation and electrical connection of the unit on site. It is the
responsibility of the installer to ensure that the equipment is safely and securely installed and left onl y
when mechanically and electrically safe.
 All regulations and requirements must be strictly followed to prevent hazards to life and property, both
during and after installation, and during any subsequent servicing and maintenance.
 Certain applications may require the installation of sound attenuation to achieve the sound levels required.
 The unit must not be connected directly to a tumble drier.
 The exhaust grille should be located at least 600mm away from any flue outlet.
 This product and associated duct installation should be carried out in accordance with the Domestic
Ventilation Compliance Guide.

3
INSTALLATION
Position the unit, taking into consideration the position of the rooms to be ventilated, the exhaust position
and the electrical services. Ensure there is adequate access for installation and maintenance.
If the unit is sited in the heated void of the dwelling a condensate drain should not be necessary.
When sited in a cold loft, consideration should be given to fitment of a condensate drain. Alternatively the
unit and ducting can be externally insulated to minimize condensation within the units housing.
To reduce the system resistance in your duct system, and therefore lower the speed, power consumption
and noise of the fan, follow these guidelines:
1.1. Keep the length of duct runs to a minimum, particularly the exhaust duct run.
1.2. If you need to use flexible ducting, make sure that it is fully extended and not crushed,
sagging or torn.
1.3. Try to minimize the use of diffusers/valves by having similar length duct runs to the inlets.
1.4. The bend radius (measured to the inside of the bend), should be at least 1x the duct
diameter.
1.5. Avoid having any bends, filters or other obstructions within 250mm of the fan inlets and
outlet.
Securely mount the unit through the mounting holes on the casing using appropriate fixings (not supplied)
for the mounting substrate. Fixings to be capable of securing 4x the weight of the unit. Unit weight: 4.1kg.
Anti-vibration mounts, acoustic mats or rubber bushes can also be used.
Mounting point dimensions and installation example shown below:
To maintain the IPX2 rating of the unit, the unit must not be
mounted with the cover removal slots facing upwards,
or at an angle where they are visible from above.
All other orientations are acceptable.

4
WIRING
WARNING:
THE UNIT AND ANCILLARY CONTROL EQUIPMENT MUST BE
ISOLATED FROM THE POWER SUPPLY DURING THE INSTALLATION /
OR MAINTENANCE. THIS UNIT MUST BE EARTHED.
1. To remove the cover, use a coin or similar; depress the retaining tabs via the slots in the side of
the unit.
2. With the power off, connect a suitable mains power cable from a switched, fused spur to the screw
terminal block. Use the cable clamps and clip provided to secure the lead.
3. Two mains voltage Live Switched (LS1 and LS2) connections are provided, and can be used to
trigger a change in speed. Common inputs would be from a bathroom lighting circuit. When
commissioning the unit, a delay on timer and an overrun timer can be selected and adjusted in the
software using the buttons and screen. See Commissioning section on page 5 of this document for
details.
4. The switched live output (230Vac) from any other switch or controller, (such as a simple latching
pullcord or push button switch, humidistat or PIR detector) can be connected to the LS terminal
instead of connecting to a lighting circuit.
5. Important: Use 4-core, low voltage, twisted pair, telecoms type cable for accessories. Accessories
are connected via the IO (Input Output) PCB; see the Low Voltage Connections diagram in the Main
fitting and wiring guide, downloadable on the website.
A: Main power connections
The LS1, LS2 and NS terminals are
electrically isolated. If the LS connections
are used, a connection must be made
with the NS terminal. This can be via a
jumper or dedicated neutral connection.
This appliance incorporates an earth connection for functional purposes only
Connection
Description
1
L
Live (220-240Vac)
2
N
Neutral
3
Functional Earth
4
LS1
Live Switched 1, (220-240Vac), isolated
5
LS2
Live Switched 2 (220-240Vac), isolated
6
NS
Neutral Switched, isolated
1
2
3
5
4
6

5
COMMISSIONING
1. Commissioning and configuration on all products is supported
by the 3 digit user interface and associated push buttons:
2. When powered on, the unit will display the firmware revision number, after a few seconds the unit
will display the first option in the User Parameters (see table on next page).
3. Changes to the settings can be made via the +and –buttons, the Menu button will
accept changes and move onto the next menu option.
4. When setting the speeds, there is an internal logic: low<Normal<Boost<Purge. I.e., Boost is
always higher than Normal.
5. The actions for each of the Live Switched (LS), inputs are selectable. The setting for delays and
over run timers are applicable to all inputs.
6. If the unit being commissioned is not fitted with the relevant hardware, the associated menu
options will not be available.
SERVICING & MAINTENANCE
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST
BE ISOLATED FROM THE POWER SUPPLY DURING MAINTENANCE.
1. At intervals appropriate to the installation, the fan should be inspected and cleaned to ensure there
is no significant build-up of dirt or other deposits.
2. To inspect the inside of the product isolate the power, use a coin or similar to depress the cover
retention clips.
3. Remove the cover, remove the scroll assembly by unscrewing the two screws and unclipping the
clips in the two corners and pulling away. If necessary, vacuum the inside of the Unit.
4. The fan has sealed for life bearings, which do not require lubrication. Expected service life is at least
45,000 hours continuous running.
5. Check all fixings are tight and secure

6
User Configurable Parameters:
Display
text
Function
Selections
Default
Lxx
Low speed
1 to 97% motor speed
10%
nxx
Normal speed
2 to 98% motor speed
35%
bxx
Boost speed
3 to 99% motor speed
70%
Pxx
Purge Speed
4 to 100% motor speed
100%
LS1
Live switch 1
Low, Boost or Purge speed
Low
LS2
Live switch 2
Low, Boost or Purge speed
Boost
LS3
Live switch 1&2
Low, Boost or Purge speed
Purge
c-n
Comfort mode
Comfort mode - yes or no
No
d-n
Delay On
Delay on - yes or no
No
dxx
Delay On time
Delay to boost duration 1 to 60 minutes
10m
o-n
Overrun
Overrun - yes or no
No
oxx
Overrun time
Overrun duration 1 to 60 minutes
10m
r-n
Humidity –Rapid Rise
Rapid rise - yes or no
Yes
A-n
Humidity –Ambient Response
Ambient response - yes or no
No
hxx
Humidity threshold
Ambient response threshold 40 to 80% RH
70%
C2b
CO2 threshold boost
Boost threshold 1000 –1500 PPM
1000
C2P
CO2 threshold purge
Purge threshold 1400 –1800 PPM
1500
A1LA
Analogue 1 - low action
Low, Normal, Boost or Purge speed
Low
A1HA
Analogue 1 - high action
Low, Normal, Boost or Purge speed
Purge
A1tL
Analogue 1 - low threshold
Analogue Input Threshold Low 1 - 99
15
A1tH
Analogue 1 - high threshold
Analogue Input Threshold High 1 - 99
75
A2LA
Analogue 2 - low action
Low, Normal, Boost or Purge speeds
Low
A2HA
Analogue 2 - high action
Low, Normal, Boost or Purge speeds
Purge
A2tL
Analogue 2 - low threshold
Analogue Input Threshold Low 1 - 99
15
A2tH
Analogue 2 - high threshold
Analogue Input Threshold High 1 - 99
75
D1
Digital input 1 Action
Low, Boost or Purge speeds
Low
D2
Digital input 2 Action
Low, Boost or Purge speeds
Purge
unl
Unlock code
Turn on/off the menu lock
- - -
PIn
Display Pin
3 characters A to 9
LoC
dtxx
Display time
Adjust how long the display is illuminated
30 s
rot
Rotate display
Invert the display
rot
hu
Humidity
Show the current internal humidity
%
tu
temperature
Show the current internal temperature
°C
CO2
CO2
Show the current CO2 level
PPM
end
end
End of menu (loop to start)

7
Product Fiche
Name:
Monsoon
Model ID (Stock Ref.) :
MON-MEVDC400
MON-MEVDCH400
SEC Class
B
SEC Value ('Average')
-27.2
SEC Value ('Warm')
-11.7
SEC Value ('Cold')
-54.3
Label Required? (Yes/No=Out of scope)
Yes
Declared as: RVU or NRVU/UVU or BVU
RVU/UVU
Speed Drive
Multi Speed
Type HRS (Recuperative, Regenerative, None)
None
Thermal Eff: [ (%), NA(if none)]
N/A
Max. Flow Rate (m3/h)
338.8
Max. Power Input (W): (@Max.Flow Rate)
43
LWA: Sound Power Level dB)
46.4
Ref. Flow Rate (m3/s)
0.066
Ref. Pressure Diff. (Pa)
201
SPI [W/(m3/h)]
0.07
Control Factor & Control Typology: (CTRL/ Typology)
Control Factor; CTRL
0.65
Control Typology
Local Demand Control
Declared: -Max Internal & External Leakage Rates(%) for BVUs or carry over (for
regenerative heat exchangers only), Ext. Leakage Rates (%) for Ducted UVUs;
<5% Internal, <5% External
Mixing Rate of Non-Ducted BVUs not intended to be equipped with one duct
connection on either supply or extract air side;
N/A
Position and description of visual filter warning for RVUs intended for use with
filters, including text pointing out the importance of regular filter changes for
performance and energy efficiency of the unit
N/A
For UVUs (Instructions Install Regulated Supply/Extract Grilles Façade)
In F&W
Internet Address (for Disassembly Instructions)
www.nationalventilation.co.uk
Sensitivity p. Variation@+20/-20 Pa: (for Non-Ducted VUs)
N/A
Air Tightness-ID/OD-(m3/h) (for Non-Ducted VUs)
N/A
Annual Electricity Consumption: AEC (kWh/a)
0.4
Annual Heating Saved: AHS (kWh/a)
AHS: Average
28.3
AHS: Warm
12.8
AHS: Cold
55.4

8
Disposal
This product should not be disposed of with household waste. Please recycle where facilities exist.
Check with your local authority for recycling advice.
National Ventilation
Stathe Road
Burrowbridge
Somerset
TA7 0RY
496354 A 0720
Contact Information
Website: www.nationalventilation.co.uk
email: [e-mail]
Sales and technical hotline: [phone]