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  Installation and Wiring Instructions for the Multivent Multi-Speed Extract Fans. 

 

     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. 

• 

Ambient exhaust air temperatures higher than 40°C or less than –5°C. 

  Relative humidity above 90% 

• 

Possible obstructions which would hinder the access or removal of the Unit. 

  Sudden ductwork bends or transformations close to the Unit. 

 

SAFETY AND GUIDANCE NOTES 

 
1. DO NOT install this product in areas where the following may be present or occur: 
1.1. Excessive oil or a grease laden atmosphere. 
1.2. Corrosive or flammable gases, liquids or vapours. 
1.3. Ambient temperatures higher than 40°C or less than -5°C. 
1.4. Possible obstructions which would hinder access or removal of the Fan. 
2. All wiring to be in accordance with the current I.E.E. Regulations, or the appropriate standards of your country and 
MUST be installed by a suitably qualified person. 
3. The fan should be provided with a 3A fused, isolator switch capable of disconnecting all poles, having a contact 
separation of at least 3mm. 
4. Ensure that the mains supply (voltage, frequency, and phase) complies with the fan’s rating label. 
6. When the fan extracts air from a room containing an open flue of a gas or fuel burning appliance, precautions 
must be taken to avoid the back-flow of gases into the room. 
7. The fan should not be used where it is liable to be subjected to direct water spray. 
8. The fan should be mounted at the highest point in the system to protect it from condensation build up. 
9. This fan should be vented to the outdoors. 
10. 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. 
11. Children should be supervised to ensure that they do not play with the appliance. 
12. PLEASE NOTE: Some older fluorescent and low energy lighting products can interfere with other 
electronic/timing circuits. For reliable operation of timers use post 2000 low energy bulbs or tungsten filament bulbs 
in the room lighting circuit. 

 
TYPICAL INSTALLATION

 

 

Summary of Contents for Lo-Carbon MULTIVENT MVDC-MS

Page 1: ...CONJUNCTION WITH THE ILLUSTRATIONS PLEASE SAVE THESE INSTRUCTIONS Lo Carbon MULTIVENT MVDC MS MVDC MS H VENTILATION SYSTEMS Stock Ref N MVDC MS 437634B MVDC MS H 443298A Installation and Wiring Instr...

Page 2: ...2...

Page 3: ...should be provided with a 3A fused isolator switch capable of disconnecting all poles having a contact separation of at least 3mm 4 Ensure that the mains supply voltage frequency and phase complies wi...

Page 4: ...y sensor uses one of the two available LS inputs the other remaining LS input can be used to switch the unit to Purge speed The MVDC MS H has the option to switch from Normal to Boost speed in effect...

Page 5: ...ct diameter The larger the better Avoid having any bends filters or other obstructions within 250mm of the fan inlets and outlet 1 Position the MULTIVENT taking into consideration the position of the...

Page 6: ...onnections are correct and that all terminal screws and cable clamps are securely fastened 4 To enable the fan to switch to boost or purge speed when a light is turned on connect the switched live con...

Page 7: ...o the Purge LS connection on the mother board 5 The output 230V from the internal humidistat PCB is connected to the Boost LS terminal 6 Upon installation it is possible that the humidity controller w...

Page 8: ...an isolated switched live connection to the LS connection on the power supply terminal block WARNING THE SWITCHED LIVE CONNECTION TO THE LS CONNECTION MUST BE ISOLATED FOR EXAMPLE USING AN ISOLATOR RE...

Page 9: ...o achieve the stated energy efficiency rating with Local Demand Control LDC the arrangement below should be used The sensors S1 and S2 can be chosen based on the installation requirements Fuse L N E 1...

Page 10: ...clockwise will increase the speed If a purge switch is installed this activates the unit at maximum speed Once the MVDC MS is commissioned apply white label over marked area containing Boost and Norm...

Page 11: ...cal Demand Control 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 Externa...

Page 12: ...fied or repaired by any person not authorised by the company IF CLAIMING UNDER TERMS OF GUARANTEE Please return the complete product carriage paid to your original supplier or nearest Vent Axia Centre...

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