Riken Keiki GD-A80 Series, Руководство по эксплуатации

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4 How to Use 4-6. How to wire
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(2) Attach the lid of the detector head and tighten four hexagon socket head bolts securely.
NOTE

Hexagon socket head bolts with a grade of "A2-70" are used.
Contact RIKEN KEIKI when the bolt is lost or replacement is necessary.
<Grounding>
Connect the detector to your grounding terminal with the external terminal .
Hex key wrench
Hexagon socket head bolts
(M5 x 20)
WARNING

Be sure to use the bolts supplied with the unit to attach the lid of the detector head.
Also, be sure to attach four bolts.

Using the bolts other than those supplied with the unit will impair the explosion-proof
performance.

When wiring is completed, check for wrong wiring once again before turning on the power.
If the power is turned on with wrong wiring, sensor disconnection will occur and the unit will
become unavailable.
WARNING

Before turning on the detector, never fail to connect it to a grounding terminal.

For stable operation of the detector and safety, it must be connected to a grounding terminal.
Do not connect the grounding wire to a gas pipe.

The grounding must be made as D type grounding (below 100
Ω
of grounding resistance).

For the grounding wire, use cable lugs to safely connect it to a grounding terminal without
looseness or twist.

To connect the grounding wire to the internal grounding terminal of the unit, use a crimped
terminal to which a wire with a cross-section area of 4 mm
2
or more can be attached.