AERMEC NLC User Manual (English)

Questions and Answers:

D
Diane NormanAug 15, 2025
Why does my AERMEC Chiller compressor stop due to protection intervention?
- T
  Tammy TaylorAug 15, 2025
  The compressor may stop due to several reasons: excessive flow pressure, low intake pressure, low power supply voltage, badly tightened electrical connections, or operation outside operating limits. Check the operating limits using the graphics. A malfunctioning pressure switch can also cause this, so replace the component if needed. Additionally, check the power supply voltage and calibrations, as well as the electrical isolation of the windings, if the circuit breaker protection has been triggered. Finally, check the water flow rate if the flow switch has intervened.
D
Don JimenezAug 18, 2025
How to fix high discharge pressure in AERMEC NLC Chiller?
- K
  Kimberly NewmanAug 18, 2025
  High discharge pressure in your AERMEC Chiller can be caused by high external air temperature or high utility inlet water temperature; check the operating limits using the graphics. Insufficient air or water flow can also be a factor; ensure the fans are operating correctly, the coil is clean, the pump is working at the correct speed, and the filter is clean. Check or replace the fans if their operation is anomalous. Air in the hydraulic system may also be the cause, so vent the circuit. Finally, too much refrigerant gas charged can cause this problem, so restore the correct charge.
T
Tommy WashingtonAug 21, 2025
What to do if AERMEC NLC unit does not start?
- J
  Justin BryantAug 22, 2025
  If your AERMEC Chiller unit doesn't start, check the following: ensure there is electrical voltage and inspect the safety systems upstream of the appliance. Verify that the master switch, remote switch (if present), control panel, main switch, and compressor thermomagnetic switch are all set to ON. If the flow switch isn't connected, install and wire it, but do not bridge the contacts. Check the power supply line if the voltage is too low. Finally, the coil of the compressor remote control switch could be broken, the electronic circuit board faulty, the peak condenser faulty or the compressor itself could be faulty; in that case, replace the component.
G
Gregory McleanAug 25, 2025
How to troubleshoot noises and vibrations in AERMEC NLC?
- A
  Andrew WeaverAug 26, 2025
  Noises and vibrations in your AERMEC Chiller can be due to contact between metallic bodies, so check for that. It may also be caused by weak support, in which case you should strengthen it. Loose screws can also cause this issue, so tighten them.
K
Kayla RodriguezAug 28, 2025
Why does AERMEC Chiller have low discharge pressure?
- C
  chungmariaAug 28, 2025
  Low discharge pressure in your AERMEC Chiller can be attributed to low outside air temperature or low water inlet temperature. Check the operating limits using the graphics. It may also be due to moisture in the refrigerant circuit, so empty and restore the gas charge. Air in the hydraulic system could be the culprit, so bleed the circuit. Lastly, insufficient gas load can cause this, so restore the correct load.
S
Sarah CarrollAug 31, 2025
What causes low intake pressure in AERMEC Chiller?
- W
  Willie RodriguezAug 31, 2025
  Low intake pressure in your AERMEC Chiller can result from utilities low inlet water temperature or low outside air temperature; check the operating limits using the graphics and adjust or replace the thermostatic expansion valve if damaged. It can also be caused by insufficient water flow or insufficient air flow. Control: 1. operation of the fans 2. Cleanliness of the coil 3. Pump operation (speed) 4. Filter cleanliness.
J
Jonathan BarnesSep 4, 2025
What causes high intake pressure in AERMEC Chiller?
- D
  Daniel HudsonSep 4, 2025
  High intake pressure in your AERMEC Chiller can be caused by high external air temperature or high utility inlet water temperature. Check the operating limits using the graphics. It may also be due to a thermostatic expansion valve that is too open or damaged, so adjust or replace it if damaged.
M
maria23Sep 7, 2025
What causes poor yield in AERMEC NLC Chiller?
- J
  Jessica McbrideSep 8, 2025
  Poor yield in your AERMEC Chiller can be caused by several factors: No refrigerant, so check the load and any leaks. Dirty coils, so clean the coils. A clogged water filter, so clean the filter. Incorrect appliance dimensioning, so check performance. Or operating outside the operating limits, so check the operating limits using the graphics.

AERMEC NLC Specifications

General

Brand	AERMEC
Model	NLC
Category	Chiller
Language	English

Summary

General Warnings for the Installer

Preservation of Documentation

Instructions for handling and keeping the manual for future reference.

Safety Precautions and Installation Regulations

Requirements for installation by qualified personnel and compliance with national laws.

Warranty Information

Details on warranty coverage and limitations for the product.

Regulatory Compliance and Safety Warnings

Information on standards, refrigerant gas, and electrical safety precautions.

Selection and Place of Installation

Installation Site Requirements

Criteria for selecting the installation location, including support and clearances.

Authorized Technician Installation

Requirement for installation by a qualified and authorized technician.

Positioning

Handling and Securing the Unit

Guidelines for safely handling, lifting, and securing the unit during installation.

Minimum Technical Clearances

Operation of the NLC Unit

Indoor Installation Air Management

Considerations for expelling air from indoor installations using piping.

Fan Modulation and Pressure Control

How inverter EC motors modulate fan speed to manage pressure drops.

Initial Fan Speed Setting

Procedure for setting the initial fan speed based on system pressure drops.

Max Static Useful Pressure of the Fans

Main Hydraulic Circuits

Component Supply and Installer Responsibilities

Distinguishes between supplied components and those the installer must provide.

System Draining and Freezing Prevention

Measures to prevent freezing damage in the heat exchanger during winter.

Water Quality Requirements

Specifications for water quality to ensure proper system operation.

Mandatory Components: Filter and Flow Switch

Importance and function of the obligatory water filter and flow switch.

Electrical Wirings

General Wiring and Installation Requirements

Factory wiring, connection to mains, and general installation guidelines.

Mandatory Electrical Connections and Safety

Requirements for switches, earthing, and phase connections for safety.

Power Supply Connection Procedure

Steps for connecting the unit to the main electrical power supply.

Flow Switch Wiring

Specific instructions for wiring the flow switch to the control panel.

Electrical Data Table

Electronic Regulation (pCO5)

Start-Up and Circulating Pump Operation

Steps for powering up the unit and starting the circulating pump.

Anti-Freeze Alarm Parameters

Reference parameters for the anti-freeze alarm system.

Water Flow Alarm System

Explanation of how the water flow alarm stops compressors and pumps.

Control System Architecture Overview

Diagram illustrating the connectivity of various control system components.

Auxiliary Connections

Remote Control and Pump Connections

Wiring details for the remote control panel (PGD1) and circulating pumps.

External Alarm and Fieldbus Connections

Connections for external alarms, FieldBus, and BMS cards.

External Circuit Breaker and Panel Addressing

Information on circuit breakers and addresses for remote panel communication.

User Interface (PGD1)

Control Panel Display and Keys

Overview of the graphic display and the six navigation control keys.

Interface Control Key Functionality

Detailed explanation of the functions assigned to each control key.

Start-Up Procedure

Initial Unit Loading Screens

Description of the screens displayed during the initial 60-second loading process.

System Language Selection and Modification

Procedure for selecting and changing the system language.

Menu Structure and Navigation

Operating Menu Hierarchy and Navigation

How operating menus are arranged and navigated using icons and keys.

Detailed Menu Functions

Explanation of the functions available within each menu category.

User Operating Procedures

Moving Between Menus

Step-by-step guide on navigating through different menus using control keys.

Selecting and Modifying Parameters

Process for selecting parameters and adjusting their values using the interface.

Loading the System

System Discharge

Draining the Machine

Winter Draining and Freezing Prevention

Measures to prevent freezing damage during winter shutdown.

Glycol System Disposal

Guidelines for environmentally responsible disposal of glycol fluid.

Control and First Start-Up

Preparation and Preliminary Safety Checks

Ensuring system readiness and performing pre-power-up safety checks.

Live Unit Operations and Hydraulic Checks

Procedures for operating the unit live and verifying hydraulic connections.

Refrigerant Circuit and Safety Device Checks

Verifying refrigerant circuit integrity, compressor operation, and safety devices.

Calibration of Control and Safety Parameters

Cooling and Antifreeze Setting Calibration

Calibration values for cooling settings and antifreeze intervention.

Compressor and Fan Calibration

Calibration details for compressor magnetothermic switches and fan switches.

Pressure Safety Calibration

Calibration for high pressure safety valves, switches, and transducers.

Routine Maintenance

Hydraulic and Electric Circuit Maintenance

Periodic checks for hydraulic and electric circuits to ensure efficiency.

Chiller Circuit and Mechanical Controls

Maintenance for chiller components, exchangers, and mechanical fasteners.

Unit Disposal and Refrigerant Warning

Procedures for unit disposal and a warning regarding refrigerant filling.

Troubleshooting

Unit Start-Up and Performance Issues

Diagnosing and resolving issues related to unit start-up, yield, and noise.

Compressor Protection and Pressure Issues

Troubleshooting compressor stops due to protections and pressure-related faults.

Intake and Discharge Pressure Faults

Identifying and rectifying problems with high/low intake and discharge pressures.

Lifting Points and Antivibrant Position

Weight Distribution and Percentage on Supports

Related product manuals

AERMEC NLC User Manual

Table of Contents

Questions and Answers:

AERMEC NLC Specifications

Summary

General Warnings for the Installer

Preservation of Documentation

Safety Precautions and Installation Regulations

Warranty Information

Regulatory Compliance and Safety Warnings

Selection and Place of Installation

Installation Site Requirements

Authorized Technician Installation

Positioning

Handling and Securing the Unit

Minimum Technical Clearances

Operation of the NLC Unit

Indoor Installation Air Management

Fan Modulation and Pressure Control

Initial Fan Speed Setting

Max Static Useful Pressure of the Fans

Main Hydraulic Circuits

Component Supply and Installer Responsibilities

System Draining and Freezing Prevention

Water Quality Requirements

Mandatory Components: Filter and Flow Switch

Electrical Wirings

General Wiring and Installation Requirements

Mandatory Electrical Connections and Safety

Power Supply Connection Procedure

Flow Switch Wiring

Electrical Data Table

Electronic Regulation (pCO5)

Start-Up and Circulating Pump Operation

Anti-Freeze Alarm Parameters

Water Flow Alarm System

Control System Architecture Overview

Auxiliary Connections

Remote Control and Pump Connections

External Alarm and Fieldbus Connections

External Circuit Breaker and Panel Addressing

User Interface (PGD1)

Control Panel Display and Keys

Interface Control Key Functionality

Start-Up Procedure

Initial Unit Loading Screens

System Language Selection and Modification

Menu Structure and Navigation

Operating Menu Hierarchy and Navigation

Detailed Menu Functions

User Operating Procedures

Moving Between Menus

Selecting and Modifying Parameters

Loading the System

System Discharge

Draining the Machine

Winter Draining and Freezing Prevention

Glycol System Disposal

Control and First Start-Up

Preparation and Preliminary Safety Checks

Live Unit Operations and Hydraulic Checks

Refrigerant Circuit and Safety Device Checks

Calibration of Control and Safety Parameters

Cooling and Antifreeze Setting Calibration

Compressor and Fan Calibration

Pressure Safety Calibration

Routine Maintenance

Hydraulic and Electric Circuit Maintenance

Chiller Circuit and Mechanical Controls

Unit Disposal and Refrigerant Warning

Troubleshooting

Unit Start-Up and Performance Issues

Compressor Protection and Pressure Issues

Intake and Discharge Pressure Faults

Lifting Points and Antivibrant Position

Weight Distribution and Percentage on Supports

Related product manuals