IM-P402-72 AB Issue 6
5
3. Installation
WARNING
Isolate the mains supply before unplugging the controller since hazardous voltages
will be exposed on the controller base.
The controller must be installed in a suitable industrial control panel or fireproof enclosure to
provide impact and environmental protection (pollution degree 2). Spirax Sarco can provide
suitable plastic or metal enclosures (for the standard controller only).
To unplug the controller from its base, undo the two clamping screws and pull the controller
straight forwards. Rocking the controller in the vertical plane will ease removal.
The controller may be mounted on a 'top hat' DIN rail using the mounting clip provided, or the
clip may be removed and the controller base screwed directly to a chassis plate.
Caution: Allow 15 mm (
5
/
8
") spacing between multiple units for air circulation.
The controller is for installation category II (Overvoltage category) and must be installed in
accordance with IEC 60364 or equivalent. For the US and Canadian markets the controller
must be wired in accordance with the National and Local Electrical Code (NEC) or Canadian
Electrical Code (CEC). The controller and all connected circuits must have a common isolation
system which meets the relevant requirements of IEC 60947-1 and IEC 60947-3 or equivalent.
This must be positioned close to the controller and clearly identified as the disconnect device.
A quick blow 3 amp external fuse must be fitted in all phases of the controller supply.
Screened high temperature, 3 core, 1 mm
2
(18 - 16 AWG) copper cable is required for the
probe wiring. The maximum permitted length is 100 metres (328 ft). Use cable with a suitable
temperature rating for the installation. Pirelli FP200 or Delta Crompton Firetuf OHLS are
suitable cables for the standard version. Use NEC Class 1 wiring for UL version.
Connect the screens as shown in the wiring diagrams (Section 5).
Cabling should be installed in accordance with BS 6739 - Instrumentation in Process Control
Systems: Installation design and practice or local equivalent.
If the product is not used in the manner specified in this IMI, then the protection
provided may be impared.
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