IMPORTANT
PLEASE READ ALL INSTRUCTIONS CAREFULLY BEFORE COMMENCING INSTALLATION
On receipt of your fan, check the following:
1. The type and size of fan is correct for the application.
2. The details on the rating plate are appropriate for the application, including: Voltage,
Frequency (Hz), Speed, Phase (1 or 3 phase), Insulation Class, I.P. Rating.
Description
The RMV fan is a vertical exhausting roof ventilator with an aluminium centrifugal impeller and backward inclined
blades. The housing is manufactured from high quality fibre-glass reinforced polyester.
The fan is intended for extracting air, which is exhausted vertically. The unit is not suitable for the supply of fresh air.
The fan is designed for continuous operation and must not be switched on and off at intervals of less then 5 minutes.
The fan is capable of handling air duct temperatures up to 100
o
C continuously. (See important note under Electrical
Connections).
Transport and Handling
The fan should be transported horizontally and may only be lifted by the lower casing or the base.
Mounting
Each fan is supplied and assembled ready for installation.
for easy and quick mounting the following points are of importance.
1. The fan should be installed with its base plate mounted securely to the roof Kerb. When fixing to a Kerb made of
concrete, bricks or wood, make absolutely sure that the suface, on which the fan is to be mounted, is perfectly
clean and level. In order to obtain an airtight fit, use a seal of non-porous soft material between Kerb surface and
fan base.
2. Fans should be mounted with the cowl in a vertical position to avoid any problem from rain and wind.
3. Connect the electrical supply cable, if it comes from inside the building, through the inlet gland in the base of the
unit, then make sure that the gland opening is sealed against leakage of air and water.
4. Put the fan on the Kerb and fasten it by means of 4 screws or bolts. Use plastic washers under the bolt or
screwheads.
5. Tighten bolts/screws evenly and not too hard in order to prevent deformation of the base and check by hand that
the impeller runs smoothly and without fouling.
Inspection/Maintenance
The unit should, from time to time, be checked in order to ensure that it is functioning correctly. The extent and
frequency of these checks depend on each installation. Before carrying out any inspection/maintenance activities,
isolate the fan from the mains and ensure that it cannot be accidentally turned back on. The motor used in the unit
does not require any maintenance or re-lubrication. It is located out of the airstream and is accessible by removing
the central weather cover held in place by three spring clamps. Check that the impeller, motor and base are not
damaged or dirty. Clean the components if necessary. Avoid damaging the protective coating. Do not spray with
water.
Re-assemble the unit, ensuring that all the guards and covers are correctly fitted. Switch on and check correct
rotation.
SAFETY INSTRUCTIONS FOR AIR MOVING EQUIPMENT
• Air moving equipment may present mechanical, electrical or noise hazards. To minimise 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 while
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. Actual sound levels are
indicated in the Vent-Axia industrial catalogue for each product and it may be necessary to take appropri
ate action to reduce sound levels. A range of products are available for this purpose from Vent-Axia.