Twin City ES-309 User Manual

ATEX Fans

INSTALLATION, OPERATION & MAINTENANCE MANUAL

ES-309

August 2014

Contents

Introduction .........................................................................1

Personal Protection ............................................................1

Hazardous Materials........................................................... 1

Installation

Shipping and Receiving ................................................1

Handling .........................................................................1

Unit Storage ................................................................... 1

Foundations and Supporting Structures

- Industrial Fans .......................................................1

Fan Installation - Assembled or Disassembled ......... 1

Bearing Installation ........................................................ 1

Shaft Seal/Closing Plate ............................................... 1

Grouting .......................................................................... 1

Drive Mounting .............................................................. 1

Flexible Couplings ......................................................... 1

Duct Connections ..........................................................1

Guards and Enclosures ................................................2

Electrical Supply and Controls .................................... 2

Vibration ......................................................................... 2

Maintenance ........................................................................ 2

Fan Operation

Proper Use and Application......................................... 2

Sound ............................................................................. 2

Operation Checklist .......................................................2

Troubleshooting Guidelines ........................................... 2

Introduction

This manual has been prepared to guide users of fans
designed to meet the requirements of the European
Unions ATEX (ATmosphères EXplosifs) Directive. It details
the measures necessary for proper installation, opera­tion and maintenance procedures and is in accordance
with EN 14986. Personnel operating or maintaining this
equipment shall be trained in the proper procedures for
doing so.
This manual is to be used along with manual ES-2-06
“Installation, Operation and Maintenance Manual – Fans
with CE Mark”. This addendum for ATEX fans identi­fies additional considerations beyond ES-2-06 specific
to ATEX fans. Guidelines identified in ES-2-06 must be
followed unless otherwise stated here.
ATEX fans are supplied for safe operation in the con­ditions they were designed for. However, to assure safe
operation, the fans must be operated within the limits
identified in the documentation included with each fan
shipment as well as installed, inspected and maintained
as indicated in ES-2-06 and this bulletin. Unless autho­rized by Twin City Fan Companies, Ltd., modifications
must not be made to the fan. Any modification per­formed would void the warranty and ATEX certification.

Personal Protection

See ES-2-06 for required personal protection.

Hazardous Materials

See ES-2-06 for hazardous materials considerations.

Installation

Shipping and Receiving

See ES-2-06 for shipping and receiving requirements.

Handling

See ES-2-06 for handling requirements.

Unit Storage

See ES-2-06 for storage requirements.

Foundations and Supporting Structures

- Industrial Fans

See ES-2-06 for foundation and supporting structure
requirements.

Fan Installation - Factory Assembled or
Disassembled Units

See ES-2-06 for fan installation requirements.

Bearing Installation

See ES-2-06 for bearing installation requirements.

Shaft Seals / Closing Plate

Most fans supplied by Twin City Fan Companies for
ATEX applications will use a brass closing plate to mini­mize leakage around the shaft. This closing plate must
be aligned to give approximately the same clearance at
all points around the OD of the shaft. It is important
that the alignment of this plate is verified before start­ing the fan.
Seals manufactured by others must be installed, oper­ated, and maintained per the manufacturer’s instructions.

Grouting

See ES-2-06 for grouting requirements.

Drive Mounting

See maintenance section below for additional consider­ations for drives on ATEX fans.

See ES-2-06 for additional drive mounting requirements.

Flexible Couplings

See ES-2-06 for flexible coupling requirements.

Duct Connections

Fans with duct connections must allow for inspection of
critical clearances between rotating and stationary parts
and must allow for cleaning. Inlet and outlet ducts must
have sufficient access doors to allow for inspection iden­tified in this bulletin as well as in ES-2-06.

The layout of the inlet ducting must assure that the
air entering the fan is sufficiently mixed with regards to
temperature. Localized hot sections of the air stream
could become a hazard if they are at a higher tempera­ture than the equipment was evaluated for.

Ducting shall be so arranged that the fan is not posi­tioned at a “low point” where it is possible for foreign
objects or liquid to lodge. See ES-2-06 for additional
duct connection requirements.

©2014 Twin City Fan Companies, Ltd.

Guards and Enclosures

ATEX fans must be protected to at least IP20 of
EN 60529 against the ingress of foreign particles. To
achieve this, the mesh size used for guarding must not
allow particles greater than 12.5 mm to pass. A mesh
of this size can negatively impact fan performance. If
it is possible to achieve this protection for the fan by
using a mesh located away from the fan inlet and in a
lower velocity section of ductwork, then losses due to
the added mesh can be minimized.
See ES-2-06 for additional guard and enclosure
requirements.

Electrical Supply and Controls

Electrical equipment for ATEX fans must comply with
an equipment group, category and zone according to
EN 60079-0 or EN 50281-1-1 that is appropriate for the
fan it is driving / monitoring and is appropriate for the
specific environmental conditions at the place of instal­lation.
Any monitoring devices used must be checked regu­larly to assure proper operation.
The manufacturers’ instructions for all electrical sup­ply, controls and equipment must be followed. This is
particularly important in the case of thermally protected
motors.
See ES-2-06 for additional electrical supply and con­trol requirements.

Vibration

Vibration monitoring is mandatory for fans that are
Category 2D in the airstream. Alarm shutdown levels
shall meet the requirements of ISO 14694.
See ES-2-06 for additional vibration considerations.

Maintenance

Safe operation of ATEX fans rely on clearances between
rotating and stationary parts being maintained. These
clearances can be reduced due to layers of combustible
or non-combustible materials. Every fan must be inspect­ed regularly and cleaned as needed to avoid a buildup
of materials. The required frequency of inspection and
cleaning will vary based on application; therefore the
user must determine the frequency of inspection and
cleaning required to avoid a buildup of materials.
Belt drives may become a source of hazardous tem­peratures if they are not tensioned or aligned properly.
Drives must be aligned as indicated in ES-2-06 and
tensioned as indicated on datasheet SF 5003 supplied
by Twin City Fan. Replacement belts must be identical
to those originally supplied.

Rotating components may be grounded through anti­friction bearings. Bearings must be checked and if nec­essary replaced after a voltage spike or similar electrical
incident.
See ES-2-06 for additional maintenance require­ments.

Fan Operation

Proper Use and Application

It is critical that ATEX fans are used as intended and
in accordance with the limits and markings of the fans.
ATEX fans are supplied with a datasheet indicating the
operation limits. Operation outside of these limits may
cause an explosion hazard.
Operating within acceptable vibration levels is critical
to obtain the expected life of the fan and components.
Vibration levels must be in conformance with ISO 14694.
In addition, fans must not be subject to external vibration
either while at rest or during operation.
See ES-2-06 for additional information on proper use
and application.

Sound

See ES-2-06 for considerations regarding sound.

Operation Checklist

Required clearances between rotating and stationary parts
must be verified before starting the fan. Clearances indi­cated in “ATEX – FAN CLEARANCES CHECKLIST” must
be verified with the fan and ductwork installed before
startup. Form “ATEX – FAN CLEARANCES CHECKLIST”
is specific to each fan and is included with the ship­ment of each fan. The measured clearances should be
recorded and compared to the design minimum values
to verify that the design requirements are met before the
fan is started.
See ES-2-06 for additional items in the operation
checklist.

Troubleshooting Guidelines

See ES-2-06 for troubleshooting guidelines.

TWIN CITY FAN & BLOWER | WWW.TCF.COM

5959 Trenton Lane N | Minneapolis, MN 55442 | Phone: [phone] | Fax: [phone]