AERMEC NRK 0300 User Manual

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• Reversible Heat Pumps

• Air-Water

• Outdoor Installation

• Axial Fans

• Scroll Compressor

• High Efficiency



EN

NRK

0150÷0700

INRKIY_15.11_5167555_01

Table of Contents

Questions and Answers:

P
Pedro BrewerAug 14, 2025
Why AERMEC Air Conditioner unit does not start?
- E
  egomezAug 14, 2025
  The AERMEC Air Conditioner unit might fail to start due to several reasons: * Lack of electrical voltage, requiring a voltage check and inspection of upstream safety systems. * The master, remote, control panel, or main switch being OFF, needing to be set to ON. * An uninstalled or unwired flow switch, which needs proper installation, avoiding bridging the contacts to prevent damage in case of insufficient water. * Low power supply voltage, necessitating a check of the power supply line. * A broken compressor remote control switch coil, faulty electronic circuit board, faulty peak condenser, or faulty compressor, each requiring component replacement.
C
Charles GreenAug 18, 2025
What to do if AERMEC Air Conditioner compressor stops due to the intervention of the protections?
- J
  Jamie HartAug 18, 2025
  If the AERMEC Air Conditioner compressor stops due to the activation of its safety mechanisms, it could be due to: * Excessive flow pressure. * Low intake pressure. * Low power supply voltage. * Poorly tightened electrical connections. * Operation outside operating limits. In these cases, check the operating limits using the graphics. It may also be due to a malfunctioning pressure switch (replace the component), intervention of circuit breaker protection (check the power supply voltage and calibrations, and the electrical isolation of the windings), or flow switch intervention (check water flow rate).
R
Richard Sheppard IIAug 21, 2025
Why AERMEC Air Conditioner compressor has high discharge pressure?
- A
  Aaron WrightAug 21, 2025
  High discharge pressure in the AERMEC Air Conditioner's compressor can be caused by: * High external air temperature. * High utility inlet water temperature. In such cases, check the operating limits using the graphics. * Insufficient air or water flow. Control the operation of the fans, the cleanliness of the coil, the operation of the pump (speed), and the cleanliness of the filter. * Anomalous fan operation (check or replace if broken). * Air in the hydraulic system (vent the circuit). * Too much refrigerant gas charged (restore the correct charge).
M
madelinealexanderAug 25, 2025
Why AERMEC Air Conditioner has poor yield?
- S
  Susan HillAug 25, 2025
  Poor yield in the AERMEC Air Conditioner can stem from several causes: * Lack of refrigerant. * Dirty coils. * Clogged water filter. * Improper appliance dimensioning. * Operating outside the specified limits. To address this, check for refrigerant leaks and replenish the refrigerant, clean the coils and the filter, check the appliance's performance, and verify that the operating limits are within the ranges specified in the graphics.
T
Thomas BrewerAug 27, 2025
What causes noises and vibrations in AERMEC Air Conditioner?
- J
  Jessica Bentley MDAug 27, 2025
  Noises and vibrations in your AERMEC Air Conditioner can arise from: * Contact between metallic bodies (check). * Weak support (strengthen). * Loose screws (tighten the screws).
J
jamesgillAug 31, 2025
Why AERMEC Air Conditioner compressor has low discharge pressure?
- D
  Danny RussellAug 31, 2025
  Low discharge pressure in the AERMEC Air Conditioner's compressor can occur due to: * Low outside air temperature. * Low water inlet temperature. Check the operating limits using the graphics. * Moisture in the refrigerant circuit (empty and restore the gas charge). * Air in the hydraulic system (bleed the circuit). * Insufficient gas load (restore the correct load).
J
Jessica GreenSep 3, 2025
Why AERMEC Air Conditioner compressor is noisy?
- H
  Heather MartinezSep 3, 2025
  A noisy compressor in the AERMEC Air Conditioner can be attributed to: * Liquid return to the compressor (check). * Inadequate fixing (check). * Inverted phase (invert a phase).
M
Matthew MccarthySep 7, 2025
Why AERMEC Air Conditioner has high intake pressure?
- L
  Luis JonesSep 7, 2025
  High intake pressure in your AERMEC Air Conditioner can be caused by: * High external air temperature. * High utility inlet water temperature. * Thermostatic expansion valve being too open or damaged. Check the operating limits using the graphics and adjust or replace the valve if damaged.
M
Michelle JohnsonSep 10, 2025
Why AERMEC Air Conditioner has low intake pressure?
- A
  Andre LucasSep 10, 2025
  Low intake pressure in the AERMEC Air Conditioner may result from: * Utilities low inlet water temperature. * Low outside air temperature. * Thermostatic expansion valve damaged or blocked. Check the operating limits using the graphics and adjust or replace if damaged. * Insufficient water flow. * Insufficient air flow. Control operation of the fans, cleanliness of the coil, pump operation (speed), and filter cleanliness.

AERMEC NRK 0300 Specifications

General

Brand	AERMEC
Model	NRK 0300
Category	Heat Pump
Language	English

Summary

General Warnings and Safety

General Warnings

Safety and Installation Standards

Mandatory safety checks and installation standards to follow.

Receipt and Handling Procedures

Selection and Place of Installation

Criteria for selecting the installation location and ensuring proper placement.

Hydraulic Connection Positions

Main Hydraulic Circuits

Internal Hydraulic Circuit Diagram

External Hydraulic Components

Electric Connections

Electrical Connection Overview

Electrical Connection Safety

Critical warnings and safety checks for electrical wiring.

Electric Power Connection Steps

Electric Data Table

Electrical Data for 460V-3-60Hz

User Interface (PGD1)

Interface Control Keys Description

Start-Up Procedure

Initial Unit Start-Up Screens

Menu Structure and Navigation

Operating Menu Hierarchy

Menu Functions and Details

User Operating Procedures

Navigating Between Menus

Modifying Operating Parameters

Control and Commissioning

Pre-Commissioning Checks

Pre-checks and preparatory steps before unit commissioning.

Unit Start-Up Process

Procedure for starting up the unit with power applied.

Hydraulic Circuit Checks

Checks to be performed on the unit's hydraulic circuit.

Cooling Circuit Checks

Checks to be performed on the unit's cooling circuit.

Routine Maintenance

Electric Circuit Maintenance

Hydraulic Circuit Maintenance

Cooling Circuit Maintenance

Mechanical Component Maintenance

Extraordinary Maintenance

Trouble Shooting

Unit Fails to Start

Troubleshooting steps for when the unit fails to start.

Poor Unit Yield Issues

Diagnosing and resolving issues related to poor unit performance.

Noisy Compressor Diagnosis

Troubleshooting steps for a noisy compressor.

Noise and Vibration Troubleshooting

Identifying and rectifying sources of noise and vibration.

Compressor Protection Trips

Troubleshooting steps when compressor protections trip.

High Discharge Pressure

Diagnosing and resolving high discharge pressure issues.

Low Discharge Pressure

Diagnosing and resolving low discharge pressure issues.

High Intake Pressure

Diagnosing and resolving high intake pressure issues.

Low Intake Pressure

Diagnosing and resolving low intake pressure issues.

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