Emerson GW-810-3760, Инструкция по установке и эксплуатации

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General Description Functional Overview • 3
2 Functional
Overview
2.1. General Description
Gas monitors are specified to support compliance to
federal, state and local safety codes governing
emissions. Avoiding significant refrigerant loss
reduces equipment replacement costs, maintains
equipment efficiency, promotes safety, and protects
the environment.
The RLDS provides for the continuous monitoring of
refrigerant gas levels in up to 16 separate test
zones
or
channels
. The instrument is easily programmed to
monitor a variety of gases (dependent on the
particular model) and independent leak (small), spill
(medium), and evacuation (large) levels may be
designated for each zone. The instrument also retains
a log of previous readings that can be easily accessed
for analysis.
An audible alarm and front panel indicators are
provided to signal alarm and fault conditions, and
relay contacts are provided that can be used to trigger
external alarm devices in the event of a system fault,
or if a leak (small), spill (medium), or evacuation
(large) level of gas is detected. The system also may
be fitted with an optional two-channel 4-20mA
current loop board for connection to remote
monitoring equipment.
The RLDS requires only minor periodic maintenance
such as the occasional replacement of filters. The
monitor incorporates active diagnostics that
continuously check the system for proper operation.
A front panel indicator is provided to alert an operator
of system malfunctions, and fault codes are generated
that enable the user to identify the cause of the fault.
All 800# models of the RLDS come with the number
of line-end filters (plus one extra) to match the
number of zones for each model.
2.2. Communication
Options
The RLDS features full two-way communications via
an RS485 interface. MODBUS RTU is the
communication protocol standard and can be
connected directly to an E2 or Supervisor controller.
The instrument can be connected directly to a
Building Management System or it may be operated
as a stand-alone system. An RS-232C port is also
provided for connection to a PC. This enables the
monitor to be set up from a personal computer.
Please refer to
Section 4, Connecting
Communication Devices for a more complete
discussion of communication protocols.
Figure 2-1
- RLDS Front View