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5. Electrical Installation
Prior to Installation
•
Follow all safety guidelines in this manual when performing
electrical wiring. Electrical installation should be conducted
by qualified personnel.
•
Model CXH-A/B heaters must be installed according to the
latest editions of the relevant parts of EN60079.
•
Disconnect power to unit prior to installation. If integral dis-
connect is being serviced, ensure that feeder service to dis-
connect is off.
•
Familiarize yourself with wiring diagram and wire connection
points. Wiring diagrams are located on the inside cover of the
main control enclosure. A general wiring diagram is also
included in this manual.
•
Ensure that proper cable glands and conduit connectors have
been selected. Cable, glands and conduit must be installed
per IEC/ATEX guidelines and must have proper hazardous
Mains Connection
•
The conduit / cable entry for mains power are located on the
cast control enclosure.
•
To access the connection points for the mains power, remove
the (18) x M12 cover bolts on the main enclosure. Once re-
moved, the (3) mains wires should be connected directly to
the heater contactor or circuit breaker (if equipped). See
figures 5 and 6 for connection points.
Figure 5: Mains Power Conduit/Cable Entries
© 2020 Chromalox,
location listings.
•
1"NPT Entry on top is factory equipped with a non-certified
conduit plug
•
Unused conduit/cable entries must be plugged with certified
stopper plugs.
•
Ensure that equipment is properly grounded using designated
grounding lugs.
•
Modification of cable/conduit entries will void third party listings
and warranty.
•
Wiring should be selected based on amperages listed in table
D. Use only copper conductors and approved wiring methods.
•
An external overcurrent device is required. Overcurrent device
should be sized based on heater amperages listed in table D
and should conform to installation location requirements.
Figure 6: Mains Power Connection
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