AW Gear Meters HUB-40EX - Manual (Page 3)

HUB-40Ex Sensor
User Manual
AW Gear Meters 8809 Industrial Drive, Franksville, WI 53126  web: www.awgearmeters.com
 Tel: 262-884-9800  Fax: 262-884-9810  Email: [email protected]
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Special installation instruction for use in Hazardous Area environments
Figure 1: Hazardous Area certification tag
HUB-40Ex models are explosion-proof flow meter sensors, which may be used in Class I, Division 1 locations. Figure 1
above is a sample of the nameplate that should be clearly attached to each unit. Please make sure this nameplate is on
the unit and that the information matches what is shown above, prior to installation. If either the nameplate is not on the
unit or the unit nameplate does not match what is shown above, please notify AW-Lake Company to determine
appropriate course of action.
When installing the HUB-40Ex into an AW-Lake Company flow
meter make sure the 3/8” NPT male portion of the sensor
housing is engaged by a minimum of five (5) threads into the flow meter in order to maintain th e unit’s explosion proof
rating. HUB-40Ex models must be properly installed into a flow meter before power is applied. NOTE: It is strongly
suggested to use anti-seize grease on threads prior to installation to avoid galling.
Because the HUB-40Ex uses an explosion proof enclosure for its area protection, power must be removed from the unit
before covers are detached and seals are disconnected while in a hazardous area.
For proper installation, it is also necessary that the conduit entries on the junction box are properly sealed. To maintain
the unit’s explosion proof rating, anything threaded into the NPT conduit openings must engage by a minimum of five (5)
full threads. Original units received from AW-Lake Company are properly installed with a minimum five (5) full threads of
engagement when connected to a junction box and should not be tampered with. NOTE: It is strongly suggested to use
anti-seize grease on threads prior to installation to avoid galling.
When wiring the unit, please make sure to observe any national or local codes that may be required. An explosion-proof
seal is required within 18 inches (450mm) of the unit. Make sure units are powered by a Class 2 power supply for proper
regulation. NOTE: Power must be removed from the unit before the Swivel Collar on the hub adapter can be loosened or
adjusted.
Removal of the external housing ground terminal is not permitted for safety reasons. Please make sure to follow local
electrical code practices when installing equipment in hazardous areas.