AERMEC NRA F 650 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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AERMEC NRA F 650 L Specifications

General

Brand	AERMEC
Model	NRA F 650 L
Category	Chiller
Language	English

Summary

Unit Description and Operating Modes

Unit Selection and Configuration Guide

Unit Selection Rules and Configuration Example

Explains configuration rules and provides an example for selecting a unit.

Detailed Unit Configuration Options

Lists and explains all fields for unit configuration.

Component Descriptions: Refrigerant, Hydraulic, Electrical, and Control

Refrigerant Circuit Components

Details parts like compressor, evaporator, condenser, filter, valves.

Hydraulic Circuit Components

Lists water filter, 3-way valve, pumps, storage tank, expansion vessel.

Microprocessor Control and Device Functions

Microprocessor Functions and Settings

Details microprocessor functions for temp control, alarms, timers.

Microprocessor Functions and Alarm Management

Compressor Control, Timing, and Rotation

Explains compressor operations, timing, and rotation logic.

Alarm Control and Automatic Restart

Details alarm management and unit restart after power failure.

Technical Data: Cooling Performance

Cooling Capacity and Input Power Data

Presents performance data (capacity, power) for cooling mode.

Water Flow Rate and Pressure Drops Data

Provides data on water flow and pressure drops in cooling mode.

General and Electrical Technical Data

General Technical Specifications Overview

Includes water content, fan motor power, sound pressure.

Electrical Data: Current Absorption and Max Current

Details electrical data like current absorption and maximum current.

Unit Selection Criteria and Example

Explanation of Unit Selection Criteria

Guides on using graphs, charts, and tables for unit selection.

Detailed Unit Selection Example with Glycol

Demonstrates selecting a unit for specific project conditions with glycol.

Winter Performance and Operating Economy

Winter Performance Analysis with Free-Cooling

Analyzes unit performance in winter conditions, including free-cooling.

Economic Benefits of Free-Cooling Operation

Compares standard operation with free-cooling for energy savings.

Operating Limits and Design Data

Cooling Mode Operating Limits Chart

Shows operational limits for cooling based on air and water temperatures.

Design Data: Pressure and Temperature Limits

Specifies maximum allowable pressure and temperature values.

Cooling and Input Power Without Free-Cooling

Correction Factors for Cooling Capacity (Pf)

Provides correction factors for cooling capacity based on conditions.

Correction Factors for Absorbed Power (Pa)

Provides correction factors for absorbed power based on conditions.

Corrections for Low Noise Versions and Delta T

Correction Factors for Low Noise Versions

Correction factors specific to low noise versions.

Cooling Capacity with Free-Cooling Only

Free-Cooling Capacity Correction Factor (Cfc)

Provides correction factors for free-cooling capacity based on temperatures.

Pressure Drops Charts

Pressure Drops Without Free-Cooling

Graphs showing pressure drops vs water flow without free-cooling.

Pressure Drops With Free-Cooling and Temperature Corrections

Graphs for pressure drops with free-cooling and correction table for water temperature.

Correction Factors Tables

Glycol, Delta T, and Fouling Correction Tables

Tables for correcting capacity and absorbed power for glycol and Delta T.

Fouling Factor Correction Tables

Tables providing correction factors for exchanger fouling.

Power and Pressure Drop Corrections with Glycol

Power Correction for Glycol Solutions

Graph showing power correction factors based on glycol percentage.

Pressure Drop and Flow Rate Corrections for Glycol

Graph for correcting pressure drop and flow rate with glycol.

Useful Head (Pressure Head) Charts

Useful Head Without Free-Cooling

Useful Head With Free-Cooling

Sound Data (Free-Cooling) and Capacity Control

Sound Pressure and Power Levels in Free-Cooling Mode

Protection Device Settings and Calibration

Control Parameter Setting Ranges

Protection Device Settings by Model

Flow Switch Setting Procedure

Step-by-step guide for setting the flow switch.

Suggested Hydraulic Circuit

External Hydraulic Circuit Components and Warnings

Internal Hydraulic Circuit Diagrams

Internal Hydraulic Circuit Schematics

Refrigerant Circuit Diagrams

Refrigerant Circuit Lay-out Diagrams

Weights and Center of Gravity (Standard and Low Noise Versions)

Weights for Standard Models (Without/With Tank)

Weights for Low Noise Models (Without/With Tank)

Weights and Center of Gravity (High Temperature Versions)

High Temp. Models: Without/With Storage Tank Weights

Installation and Use: Shipping and Handling

Unit Shipping and Handling Precautions

Location and Minimum Technical Clearances

Recommended Unit Location and Requirements

Guidelines for external installation, site requirements, and leveling.

Minimum Technical Clearance Requirements

Start-up Procedures and R407C Requirements

Pre-Start-Up Checks and Unit Start-Up Process

Lists checks before start-up and the start-up process.

System Charging/Discharging and R407C Handling

Electrical Connections and Data

Electrical Connection Guidelines

Instructions for power supply connections and cable sizing.

Electrical Data Table

Electronic Board Diagram and Terminals

Electronic Board Layout (SC GR2001)

Diagram showing the electronic board layout and terminal assignments.

Terminal Descriptions (M1-M26)

Power Connections for NRA 275-350 Models

Power Supply Wiring for 275-300 Models

Power Supply Wiring for 325-350 Models

Load and Auxiliary Circuit Connections (NRA 275-350)

Load Wiring for 275-350 Models

Safety and Remote Control Connections (NRA 275-350)

Safety Device Wiring for 275-350 Models

Power Connections for NRA 500-550 Models

Power Supply Wiring for 500-550 Models

Load, Auxiliary, and Safety Connections (NRA 500-550)

Load Wiring for 500-550 Models

Safety and Remote Control Wiring for 500-550 Models

Power Connections for NRA 600-700 Models

Power Supply Wiring for 600-700 Models

Load, Auxiliary, and Safety Connections (NRA 600-700)

Load Wiring for 600-700 Models

Safety and Remote Control Wiring for 600-700 Models

Electronic Board Diagram (With Storage Tank)

Electronic Board Layout for Units with Storage Tank

Diagram showing the electronic board for units with storage tank.

Terminal Descriptions for Storage Tank Units

Power and Load Connections (NRA 275-350 with Storage Tank)

Power Supply Wiring for 275-350 Units with Tank

Load Wiring for 275-350 Units with Tank

Auxiliary and Safety Connections (NRA 275-350 with Storage Tank)

Safety and Remote Control Wiring for 275-350 Units with Tank

Power Connections (NRA 325-350 with Storage Tank)

Power Supply Wiring for 325-350 Units with Tank

Power Connections (NRA 500-550 with Storage Tank)

Power Supply Wiring for 500-550 Units with Tank

Load and Auxiliary Connections (NRA 500-550 with Storage Tank)

Load Wiring for 500-550 Units with Tank

Safety and Remote Control Connections (NRA 500-550 with Storage Tank)

Safety and Remote Control Wiring for 500-550 Units with Tank

Power Connections (NRA 600-700 with Storage Tank)

Power Supply Wiring for 600-700 Units with Tank

Load Connections (NRA 600-700 with Storage Tank)

Load Wiring for 600-700 Units with Tank

Auxiliary and Safety Connections (NRA 600-700 with Storage Tank)

Safety and Remote Control Wiring for 600-700 Units with Tank