Vent-Axia MFQ35014 Assembly instructions

Installation and Wiring Instructions
Vent-Axia controls must be used with this fan!
PLEASE READ ALL INSTRUCTIONS CAREFULLY BEFORE STARTING
INSTALLATION.
THESE INSTRUCTIONS SHOULD BE LEFT WITH THE END USER.
Square Mixed Flow Fans (MFQ)
MFQ35014
MFQ40014
MFQ45014
MFQ50014
MFQ40034
MFQ45034
MFQ50034
MFQ56034
MFQ56036
MFQ63034
MFQ63036

2

3
ORIGINAL INSTRUCTIONS
READ AND SAVE THESE INSTRUCTIONS
PLEASE READ ALL INSTRUCTIONS CAREFULLY BEFORE STARTING INSTALLATION.
INSTALLATION AND WIRING INSTRUCTIONS SHOULD BE LEFT WITH END USER.
Air moving equipment may present mechanical, electrical or noise hazards. To minimize
risks associated with these potential hazards, it is essential that safety, installation,
operation and maintenance instructions are followed. Implementation of these
instructions should always be undertaken by technically competent personnel.
Potential mechanical hazards must be eliminated by guarding against access to the
rotating parts whilst the air moving equipment is operating. A range of guards are
available for this purpose from Vent-Axia.
Installation work, both mechanical and electrical, must be undertaken in accordance
with the safety and installation instructions before switching on the unit.
Maintenance work should not be attempted before first switching off and isolating the
fan and its control from the electrical supply and ensuring that it cannot be accidentally
turned back on again. It is essential to ensure that rotating parts have come completely
to rest before maintenance work commences.
Air moving equipment may generate unacceptable noise levels when in operation. It
may be necessary to take appropriate action to reduce sound levels. A range of products
are available for this purpose from Vent-Axia.
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 this appliance by a person
responsible for their safety.
Young children should be supervised to ensure that they do not play with the appliance.
IMPORTANT
1. All electrical connections should be made by a properly qualified electrician. The fan
must be sited and connected in accordance with current I.E.E Wiring Regulations,
BS7671 (U.K.), or the appropriate standards in your country.
2. DO NOT use this appliance when the following are generated or present: Excessive
grease or oil laden air, corrosive or flammable atmospheres.
3. When the fan is installed in a room containing a fuel burning appliance, the installer
must ensure that the air replacement is adequate for both the fan and the fuel
burning appliance.
4. If a fan is used to supply air into a room, the installer must ensure that the fan
intake is located at least 600mm away from any flue outlet.

4
5. Site away from direct sources of heat. Ambient temperature range:
MFQ35014 -15oC to +60oC
MFQ40014 -15oC to +60oC
MFQ45014 -15oC to +60oC
MFQ50014 -15oC to +60oC
MFQ40034 -15oC to +60oC
MFQ45034 -15oC to +60oC
MFQ50034 -15oC to +60oC
MFQ56034 -15oC to +45oC
MFQ56036 -15oC to +60oC
MFQ63034 -15oC to +55oC
MFQ63036 -15oC to +60oC
6. When installing unit, take care not to damage electrical or other hidden utilities.
7. Check the details on the rating label for correct voltage, frequency, speed, phase
insulation class and IP rating.
8. Select the correct direction of rotation for the fan. Remove the rubber grommet fitted
in the sight port next to the terminal box to view rotation. Three phase units require
a trial connection. To change direction of rotation, interchange any two phase supply
leads.
9. It is the responsibility of the installer to ensure that all aspects of system design are
taken into consideration.
10. Due to the weight of units it is recommended that at least two people are involved in
the installation.
FAN MOUNTING
1. A duct mounted in-line fan. Short duct runs terminating close to the fan (i.e. within
1.5m) require suitable guards.
2. The fan can be mounted in a variety of ways and at any angle to suit the
application.
3. Plan the installation carefully, taking into consideration the safety points noted
above, before securely fixing the fan using appropriate screws, bolts, rubber
bushes, etc.
4. A range of accessories are available from Vent-Axia to assist installation including
flexible connectors, mounting feet, anti-vibration mounts and attenuators.

5
Suggested fan mounting using mounting feet and anti-vibration mounts.
GENERAL WIRING INSTRUCTIONS
WARNING – THE FAN AND ANY ANCILLARY CONTROL EQUIPMENT MUST BE
ISOLATED FROM THE POWER SUPPLY DURING INSTALLATION AND/OR
MAINTENANCE. THE EQUIPMENT MUST BE EARTHED.
1. All electrical connections should be made by a properly qualified electrician.
2. All wiring and connections must be carried out in accordance with current
regulations.
3. To comply with safety standards, an all pole isolator switch with a contact gap of at
least 3mm must be fitted adjacent to the fan.
4. Remove the cover from the terminal box to expose the main terminal block and the
thermal protection block (TK). The thermal protection device fitted is an automatic
resetting type which must always be included in the circuit. For ducted applications a
manual reset is required, an ancillary circuit will be required with the TK switch
connected into the circuit. To comply with safety standards, this product must
be installed with Vent-Axia overload relays or controls.
5. Connect the power supply from the local isolator (via any appropriate controls if
fitted) to the terminal box via the supplied cable gland using between 4.0mm and
7.0mm diameter cable. Refer to the wiring diagrams and select the appropriate
connections for the fan, controller or other devices as being installed. If in doubt,
please ask.
6. CAUTION: In order to avoid a hazard due to inadvertent resetting of the thermal
cut-out, this appliance must not be supplied through an external switching device,
such as a timer, or connected to a circuit that is regularly switched on and off by the
utility
7. Ensure that all earth connections have been made.
8. After making connections inside the terminal box, replace the cover ensuring that the
sealing gasket is in place. Also ensure that all cable gland nuts, grommets etc. have
been used correctly to prevent the ingress of water.
NOTES ON RUNNING
Before Connecting the power supply and running the Fan Check…
Are all links and wiring complete as per wiring diagram?
Are all fixings secured?
Are all relevant guards fitted?
Are all Circuit protection devices fitted?

6
Are all Terminal box covers and sealing glands secured?
Are all Earth connections secured?
Check that no hazard exists for persons in the locality of the fan. Switch on the fan and
check that the fan rotation is correct as per the direction arrows on the fan plate/casing.
If not, isolate power supply and check wiring. For three phase fans interchange of any
two phase leads on the supply will change rotation.
Check that the current (amps) taken by the fan does not exceed the current shown on
the rating plate.
INSTALLER AND ELECTRICAL CONTRACTOR RESPONSIBILITY
Vent-Axia Ltd, as suppliers of the equipment cannot be responsible for the final
installation and electrical connection of the product on site. We have made reasonable
effort to offer guidance and assistance but the installer and electrical contractor on site
have a responsibility for ensuring the equipment is safely and securely installed and
electrically/mechanically safe in accordance with statutory requirements.
The fans are supplied as a component to be incorporated into a ventilation system. The
final complete system installation that includes the fans MUST meet the requirements
of:-
Low voltage Directive 72/23/CEE
Machinery Directive 89/392/CE
Electromagnetic Compatibility Directive 89/336/CE
If the fan is installed in an area where there is possible danger to safety or health then
guards MUST be fitted.
Guards suitable for many applications are available from Vent-Axia Ltd.
Please remember that fans need maintenance, cleaning and inspection. Allow for
reasonable access for these operations to be carried out safely.
If in doubt, please ask.
ROUTINE INSPECTION/MAINTENANCE
THIS MUST BE UNDERTAKEN BY A COMPETENT PERSON.
ISOLATE UNIT FROM ELECTRICAL SUPPLY AND ENSURE THAT IT CANNOT BE
ACCIDENTALLY TURNED BACK ON.
1. We recommend that after three months the fan should be inspected and
cleaned to remove deposits on the impeller or motor. Thereafter, it should be
checked and cleaned periodically as experience dictates, or at least twice a
year.
2. If a build up of dirt/deposits is evident then this should be carefully cleaned off.
Please take care not to damage the fan or affect the balance of the impeller
motor assembly (balance weights may be fitted to the impeller).
3. The fan motors are fitted with ‘sealed for life’ bearings and should not require
maintenance under normal circumstances.
Wiring Diagrams:
Important Notes: - The electrical circuit must be protected with an all pole isolator
having a minimum of 3mm contact separation with suitable fuses or circuit breaker.
For ducted applications the Thermal Protector (TK) must be connected into a control
circuit in order to ensure that the fan cannot restart before the fault condition is cleared
and the circuit manually reset. To comply with safety standards, this product must
be installed with Vent-Axia overload relays or controls.

7
Vent-Axia D.O.L. Starter/Overload and Speed Controller stock reference
numbers:
Product Starter Overload Electronic
Controller
Auto
Transformer
Controller
MFQ35014 444744 444701 10303103A 10314103A
MFQ40014 444744 444702 10303103A 10314103A
MFQ45014 444744 444703 10303106A 10314105A
MFQ50014 444744 444705 10303110A 10314109A
MFQ40034 444747 444700 Not available 10314302A
MFQ45034 444747 444701 Not available 10314304A
MFQ50034 444747 444702 Not available 10314304A
MFQ56034 444747 444703 Not available 10314307A
MFQ56036 444747 444701 Not available 10314304A
MFQ63034 444747 444705 Not available 10314311A
MFQ63036 444747 444702 Not available 10314304A
Fig. 1
Single phase MFQ
Connected to a D.O.L. Starter

8
Fig. 2
Single phase MFQ
Connected to a D.O.L. Starter and an Auto Transformer Speed Controller with no TK
connections
Fig. 3
Single phase MFQ
Connected to an Electronic Speed Controller

9
Fig. 4
Three phase MFQ
Connected to a D.O.L. Starter
Fig. 5
Three phase MFQ
Connected to an Auto Transformer Speed Controller

10
Notes:-

11
Notes:-

12
Head Office: Fleming Way, Crawley, West Sussex, RH10 9YX.
UK NATIONAL CALL CENTRE, Newton Road, Crawley, West Sussex, RH10 9JA
SALES ENQUIRIES: Tel: [phone] Fax: [phone]
TECHNICAL SUPPORT: Tel: [phone] Fax: [phone]
For details of the warranty and returns procedure please refer to www.vent-axia.com or write to Vent-Axia Ltd, Fleming Way, Crawley, RH10 9YX
409582B 0716