Installation; Checks; Atex 114 Certification; Working Environment - Johnson Pump SPX FLOW TopGear GS Instruction Manual

3.0 Installation

3.1

Checks

Before installation, the equipment must be checked.
• Ensure the equipment data (as indicated on nameplate, documentation etc.) corres-
ponds to the explosive atmosphere zone, category and system requirements.
• Possible damage: the installed equipment must be undamaged and must have been
properly stored before installation (for maximum 3 years). In case of any doubt or any
damage found contact your supplier.
• Ensure that heated air from other units will not affect the environment of the pump unit;
environment air should not exceed a temperature of 40°C.
3.2

ATEX 114 certification

All additional equipment such as shaft couplings, guards, drive, motor, auxiliary equipment
etc. must be part of the ATEX 114 certification or must be certified separately for the
appropriate temperature category. The assembled pump unit must have a separate
certification and a separate nameplate supplied by the pump unit manufacturer.
3.3

Working environment

• The pump and unit must be accessible for maintenance and inspection during operation,
see IM.
• Unobstructed air supply to the pump, drive and motor should be ensured.
• An electric motor should have a free inlet for cooling air of at least 1/4 of its motor
diameter.
• The pump should be mounted horizontally, bearing entirely and squarely on the pump
feet. Deviation from the prescribed installation will influence draining, filling, venting and
good functioning of the shaft seal.
• The bearing bracket must be exposed to the atmosphere to allow cooling and to
ensure good functioning and lubrication of the grease lubricated ball bearing.
Insufficient cooling could lead to unacceptable surface temperatures of the bearing
bracket, to insufficient lubrication and to premature ball bearing failure. If proper cooling
cannot be maintained at all times, monitoring of the surface temperature of the bearing
bracket should be ensured.
• Proper separate earthing facilities should be provided close to the pump unit baseplate.
• In hazardous areas the electrical connection has to be EN 60079-14 compliant.
• The execution of the temperature monitoring equipment must fulfill the requirements
of ATEX 114.
3.4

Base plate

• The baseplate always must be provided with an earthing boss.
• Ensure the earth circuit is properly connected to the baseplate.
3.5

Drive, shaft coupling and protection guard

• The starting torque of an internal gear pump is almost identical to the nominal torque
during operation. The starting torque of the motor must be sufficiently high: the motor
power is selected 20% to 25% higher than the absorbed power of the pump.
If the starting torque is too low it will take longer to start the pump and the motor
temperature could increase to an unacceptable level. When using a variable speed
motor the cooling device of the motor must operate independently from the motor speed
or must be guaranteed to be sufficient at its lowest speed.
A.0500.601 – Atex IM -TG G/H/MAG/SRT/08.00 EN (01/2021)
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