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5
Important wiring installation
- All electrical wiring must be carried out in accordance
with Local and National Electrical Standards and
Codes. i.e. EN 60079-14 (1997) or IEC 60079-14
(1996).
- The proper wiring diagram for each unit is located
inside the SafeVision housing. Check that the correct
wiring diagram has been included and follow the
diagram carefully.
- Connect with wiring 0.5 mm2 to 2.5 mm2, check that
the wires are properly inserted into the terminal block
and that all terminal screws are tight.
- Ensure that the internal earth (Ground) wire is
connected to the screw on the Switch/Terminal block
plate using a suitable crimped lug.
- Ensure that the external earth (Ground) wire is
connected to external earth stake using minimum 2.5
mm2 wiring and a suitable crimped lug.
- All unused cable entries are to be sealed using suitable
ATEX approved blanking plugs.
6
Setting the switches
1 Each switch has its own independent cam arrangement.
2 Lift the bottom cam against the spring to disengage it
from the drive spline and turn it until the switch is
activated. Once in the correct position, push the cam
back on to the spline.
3 To set the other cam, operate the unit to the opposite
end of its travel and adjust in the same manner.
4 Operate the unit fully in both directions several times to
check that the switches are operating correctly.
DOC.SVM.1 Rev: A
Installation and setting instructions
7
Replacing the cover
1 Confirm the final position of the actuator / valve.
2 Ensure that the visual indicator display coincides with
the position of the valve and that the drive tang on the
indicator drive shaft, is in the same orientation as the
slot on the switching drive shaft.
3 Replace the cover assembly with the two shafts
engaged correctly and tighten the eight cover to base
securing screws.
4 Operate the unit fully in both directions several times to
check that the visual indicator is operating correctly.
5 If repositioning of the visual indicator display is required
for orientation, unscrew the stop screw and rotate the
outer cap anti-clockwise by 15 degrees. Lift the cap to
remove it.
6 Reset the indicator by lifting and repositioning on the
drive shaft. Replace the outer cap and retighten the
screw.
7 The SafeVision is now ready for operation.
Terminal rail
4
SafeVision Switchbox
Square Drive Shaft
Splines
Switches
Cams
Springs
March '04
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