S&P TGT Manual De Instrucciones página 28

IEC EN 60079-17: Electrical installations inspection and maintenance
IEC EN 60079 – 19: Equipment repair, overhaul and reclamation
1.2.11 Safety risks – summary list.
The following risks have been identified for consideration:-
Installation: incorrect installation or function represents a risk to safety.
Rotational speed: identified on fan name plate and motor. Never exceed this speed.
Rotation of impeller: identified on fan with direction arrows. Do not run impeller in reverse.
Working temperature: identified on fan nameplate and motor for S1 duty cycle. Never exceed this range. Refer IEC 60034-1.
Protection devices: These should always be operational and never disconnected for S1 duty cycle. Refer IEC 60034-1.
However, Emergency ventilation fan and motors are suitable for S1 duty cycle, and one off emergency smoke operation, where
fan is able to run at stated temperature and time, or to destruction, and thus no motor protection devices must stop this. The
fan motor power supply must be designed to accommodate any motor protection devices, where applicable, for S1 duty cycle
and these must be disabled or by-passed in event of one off emergency smoke operation. Power supply cables to fan motor
must be suitable for temperature and time stated when installed in potential fire area. Refer cables compliant with IEC 60332.
Power supply should be via a protected source to enable fan to run under emergency fire smoke conditions, Direct on line.
Emergency ventilation fans, can be dual purpose, or dedicated Emergency operation. If fan is not operated for long periods
then fan should be run as prescribed by local regulations, or as minimum 15 minutes each month, to ensure safe operation
Electrical risks: motor name plate data should never be exceeded, effective connection to earth, and all checked regularly every
6 months.
Foreign bodies: ensure no risk from debris, or material that could be drawn into fan.
1.3. Transport, lifting
1.3.1 Transport and lifting must be carried out by competent personnel and in accordance with applicable International, National
and Local regulations, especially for hazardous areas.
When transporting the equipment, recommend that:-
Fan equipment and packaging are protected from adverse atmosphere, especially water, sand, dust, vibration and excessive
temperature.
The fan should be protected from any impact, or risk of damage.
1.3.2 When lifting / moving fan equipment, recommend that:-
All identified fan lifting points are used to support weight and ensure safe transport via hoists, sling, spreader bar as
appropriate, without damage. Maximum included angle of any support sling must not exceed 30°. Fan equipment should not
be lifted using the motor lifting bolt, this is for lifting the motor only during maintenance, not the fan assembly.
All slings or lifting forks under the fan equipment are safe, and spaced to avoid tipping or slipping or damage to fan equipment.
Any lifting equipment must be safe and of suitable capacity for weight and size, plus lift distance. Special attention may be
required to ensure fan assembly does not distort or tilt as weight distribution may vary – especially for large centrifugal type
fans.
Any wheeled skates / load movers must be secure and suitable capacity for weight and size, plus distance moved.
1.3.3 When Fan equipment is carefully lowered or placed on a surface, be it temporary, during lifting, positioning, storage or
permanent, this must be a flat surface to avoid distortion of fan casing or fan assembly.
1.3.4 Further guidance may be found in EN 818.
Typical lifting diagrams:
28