Installation; General Information - Emerson MRLDS-450 Installation And Operation Manual

3

Installation

CAUTION! The manufacturer of this product requires that a bump test or calibration be
performed following installation to verify instrument functionality.

3.1. General Information

Every detail of installation site selection is critical to ensure overall system
performance and effectiveness. Strict compliance and considerable thought must be
given to every detail of the installation process, including, but not limited to the
following:
• Regulations as well as local, state, and national codes that govern the installation of
gas monitoring equipment.
• Electrical codes that govern the routing and connection of electrical power and signal
cables to gas monitoring equipment.
• The full range of environmental conditions to which the instruments will be exposed.
• The physical characteristics of the gas or vapor to be detected.
• The specifics of the application (For example, possible leaks, air movement/draft,
etc.)
• The degree of accessibility required for maintenance purposes.
• The types of optional equipment and accessories that will be used with the system.
• Any limiting factors or regulations that would affect system performance or 
installations.
• Wiring details, including:
• The MRLDS-450 enclosure provides the following cable gland openings:
• 2×, M20, supports 10-14mm cable outer diameter
• 6×, M16, supports 4-8mm cable outer diameter
• Secondary circuit must be supplied from an isolating source.
• The wiring for the relays must be selected and fused according to the rated 
voltages, currents, and environmental conditions.
• If stranded conductions are used, ferrule should be used.
• To comply with RFI immunity regulations, it is necessary to ground the shield of
the communications cable at the PLC, GDA controller, front-end controller or
Building Management System (For example, the chassis, the ground bus-bar,
etc.).
General Information Installation • 7