Riken Keiki SD-3 Series, Руководство по эксплуатации

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4. Installation 4-1 Installation precautions
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4
Installation
4-1 Installation precautions
Selecting an appropriate installation location is vital for system performance.
Be sure to observe the following precautions before installing.
Failure to comply with these precautions may result in failure of the product or improper function.
CAUTION

The product is a precision device. Certain conditions at the location (environment) where the product is
installed may prevent optimum performance. Check the environment at the installation location and take
all required precautionary measures depending on circumstances.

Install the number of units needed at the appropriate locations to ensure that the product plays an
important role in safety and disaster prevention.

Areas where gas is likely to leak or accumulate will differ depending on the gas type and individual work
areas. Thoroughly consider the installation locations and number of units to be installed before
installation.
4-1-1 General installation information
Observe the following precautions when installing the product:

If the product is installed in a location where the ambient temperature exceeds 65 °C, use cables designed for
use at temperatures at least 5 °C above the maximum anticipated ambient temperature.

The SD-3 and SD-3SC main units each have two M25 × 1.5 connectors for use when wiring in the field.
Connectors must always be blanked off with blanking plugs when not in use.

The GD-3 has two M25 × 1.5 connectors for connecting the SD-3SC. The connector not in use must be
blanked off with a blanking plug at all times.

Do not mount a sensor that uses a different detection principle from the model type.

Use ferrules on the ends of stranded cables.

Secondary circuits should be supplied from an insulated source. (Not suited to alarm relay contacts)

If installing without using conduits, use cable glands that comply with the explosion-proof certification. In
addition, connect cable shielding to the main unit, cable glands, and indicators to increase immunity to
electromagnetic noise and other external factors.

Select the cable, terminal plate, and other parts for wiring to alarm relays (optional) to suit the rated voltage,
current, and environmental conditions.
In addition, carefully consider the following points when installing:

All possible effects on the installation of the gas detector system

Restrictions and regulations concerning the installation of the gas detector system

Regulations concerning the operation, power supply, and signal cable connections for the gas detector
system

Ambient environmental effects to which the gas detector system may be subject

Specifics of the physical characteristics, environmental air movement and flows, and latent leaks of the
detection gas

Accessibility for required maintenance and the shape of the accessories used