I المراوح

I. FANS:


I.1 CEILING FANS AND REGULATORS:

I.1.1 Ceiling fans shall be propeller type with 3 or more blades operating in free air and shall comply
with IEC 60879 and BS 5060 and shall be as specified hereunder.

I.1.2 The fans and their associated regulators shall be suitable for operation on an electricity supply of
240V, single phase, 50Hz. Fans shall be of the higher power factor, high efficiency type
preferably with split phase capacitor shall be such that the power factor of the fans and
regulators shall be 0.85 or better at full speed. Fans and regu lators shall be suitable for
continuous operation in an ambient temperature of 55 degree centigrade.

I.1.3 Fans and regulators shall be of robust construction throughout and shall be finished on all
surfaces with suitable lacquer or other preparation to make them proof against rust during
transit, storage and operation. The fan body shall be cast or fabricated from high grade ferrous
metal or be die -cast in a hard approved alloy. If the later, particular attention shall be given to
bearing housing as detailed hereafter.

I.1.4 The motor body shall be totally enclosed. The terminal block and capacitor shall either be
housed in a terminal box or shall be installed directly above the motor body and covered by a
canopy. An earth terminal shall be provided at a suitable location.

I.1.5 The blade shall have a diameter or sweep as specified in the schedules. They shall be supplied in
accurately balanced and in marked sets. Blades shall be of pressed metal sheet with a
longitudinal stiffening rib if necessary.

I.1.6 The suspension shall be of the insulated type, the crutch holding the insulated bobbin shall be of
steel or cast iron and welded to the down rod or secured in a similar manner to the joint at the
motor as specified below. A canopy, large enough to enc lose completely the suspension crutch,
hook and ceiling rose, shall be supplied.

I.1.7 Regulators shall be of the choke type or electronic type and shall either be of all insulated
construction or assembled on a substantial metal frame and provided with a n earth terminal.
Thermo plastic covers shall be proof against discoloration and shall be of robust construction so
as to prevent breakage when accidentally dropped from 5ft. height. The design of the regulator
shall be such that it shall not be possible f or any live metal to come into contact with the frame,
even if assembly screws are in adequately tightened. Regulators shall be capable of reducing the
speed of the fan by at least 50% of the full speed. Fans shall be capable of running of any of the
contacts of the regulator at the rated voltage and shall have an off and at least 5 speed positions,
(speed positions are not applicable to electronic type regulator).



I.2 TABLE FANS:

400mm Table Fans, oscillating, induction type motor, oscillating mechani sm, adjustable to
several positions from Zero up to 90º, with regulator having three speeds and OFF positions,
suitable for operation on 240 volts, 50 Hz, single phase A.C. supply, to be continuously rated,
complete with wire guard. Sound level at maximum speed to be very low.



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I.3 PEDESTAL FANS:

400mm. Pedestal Fans oscillating, with telescopic column and base, suitable for indoor use with
integral regulator having minimum three speeds and OFF positions, induction type motor
suitable for operation on 240 volts, 50 Hz., A.C. supply, complete with wire guard. Sound level
at maximum speed to be very low.

















































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