AERMEC NRA F 350 L - User Manual

AERMEC S.P.A.
ISO 9001 - Cert. nº 0128/3
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INRAfPW
0405
6871970.00
Refrigeratori aria - acqua
Air to water chillers
NRA free cooling
R407C
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Summary

Unit Selection and Configuration

Unit Selection Guidelines

Rules and important considerations for choosing the correct unit model.

Component Identification and Description

Main Components Diagrams

Refrigerant Circuit Component Details

Detailed descriptions of key components within the refrigerant circuit.

Hydraulic and Electrical Component Details

Descriptions of hydraulic, safety, and electrical system components.

Control System and Safety Devices

Pressure Switches and Fan Control

Descriptions of high pressure switches, fan control devices, and hydraulic safety valves.

Microprocessor Control System

Overview of the microprocessor's capabilities, functions, and parameters.

Microprocessor Operation and Features

Compressor and Fan Management

Control logic for compressor/fan operation, timing, and rotation.

Unit Autostart and Alarm Handling

Procedures for automatic restart after power failure and alarm management.

Accessories and Technical Data

Cooling Performance Data

Technical data tables for cooling capacity, power absorption, E.E.R., and flow rates.

Free-Cooling Performance Data

General and Electrical Technical Data

Selection Criteria and Operating Limits

Unit Selection Criteria

Explanation of how to use tables and graphs for unit selection.

Operating Limits and Design Data

Definition of unit operating ranges and design parameters.

Correction Factors and Tables

TAV 1-2: Correction Factors

Graphs for calculating correction factors based on temperature and unit version.

TAV 3: Free-Cooling Capacity Correction

TAV 4-5: Pressure Drop Charts

TAV 6-9: Glycol and Fouling Factor Tables

Protection Settings and Hydraulic Circuits

TAV 16-17: Protection Device Settings

Flow Switch Setting

External Hydraulic Circuit

Internal Hydraulic Circuit Diagrams

Installation and Safety Procedures

Unit Delivery and Handling

Unit Positioning and Clearances

Pre-Start, Start-Up, and System Handling

Procedures for initial setup, unit start-up, and system charging.

R407 C Gas Requirements and Safety

Electrical Connections and Wiring Diagrams

General Electrical Connection Information

Wiring Diagram Key and Board Diagram

Power, Load, and Auxiliary Wiring Diagrams

Specific wiring diagrams for power, load, and auxiliary connections.

Safety and Remote Control Wiring Diagrams

Wiring diagrams for safety devices and remote control connections.

AERMEC NRA F 350 L Specifications