Lennox VRF VEC027N432U User Manual

Mini VRF
Cooling Only System
User Manual
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and keep it for further reference.
VEC027N432U
VEC034N432U
VEC042N432U
VEC048N432U
VEC055N432U
VEC060N432U

Lennox VRF VEC027N432U Specifications

General

Brand	Lennox
Model	VRF VEC027N432U
Category	Air Conditioner
Language	English

Summary

To Users

User Guidance and Disclaimers

General user guidance, safety warnings, and disclaimers for product usage and maintenance.

Exception Clauses

Limitation of Manufacturer Liability

Clauses limiting manufacturer responsibility for product issues arising from misuse or external factors.

1 Safety Notices

Critical Safety Warnings

Critical warnings about potential hazards, prohibitions, and mandatory observations for safe operation.

Installation Safety Precautions

Instructions and precautions for safe and correct installation, including grounding, wiring, and refrigerant handling.

Operational and Environmental Safety

Safe Operation and Environment Rules

Guidelines for safe operation, environmental considerations, and installation checks.

2 Product Introduction

System Overview and Components

Overview of the VRF system technology and identification of main outdoor unit parts.

2 Product Introduction

Unit Combinations and Operating Range

Details unit combinations, connectable IDUs, and operating range specifications.

3 Preparation before Installation

Standard Parts and Site Selection

Lists standard parts and provides guidelines for selecting a suitable installation location.

3 Preparation before Installation

Space Requirements and Piping Rules

Specifies space requirements around the ODU and details piping work requirements for the refrigerant system.

4 Installation Instruction

Outdoor Unit Dimensions and Mounting

Provides dimensions of the outdoor unit and mounting hole specifications for installation.

4 Installation Instruction

Connection Pipe Diagrams and Lengths

Illustrates piping diagrams and specifies allowable lengths and height differences for connection pipes.

4 Installation Instruction

Connection Pipe Length and Height Limits

Details allowable lengths and height differences for connection pipes, categorized by model series.

4 Installation Instruction

Main Pipe Sizing and Branch Selection

Specifies main pipe dimensions and guidance for selecting indoor branches.

4 Installation Instruction

Indoor Piping Dimensions

Details pipe dimensions for connections between indoor branches and to individual IDUs.

4 Installation Instruction

Pipe Connection and Bending Procedures

Covers pipe connection precautions, flaring, and bending techniques.

4 Installation Instruction

Indoor/Outdoor Pipe Connections and Insulation

Details indoor/outdoor pipe connection procedures, torques, and thermal insulation.

4 Installation Instruction

Y-Branch Installation and Diagrams

Illustrates Y-branch installation and provides guidance on cutting and orienting branches.

4 Installation Instruction

Pipeline Thermal Insulation Guidelines

Guidelines for applying thermal insulation to pipes to prevent condensation and leakage.

4 Installation Instruction

Pipeline Support and Refrigerant Charging

Instructions on pipeline support, compressor foot removal, vacuum pumping, and refrigerant charging.

4 Installation Instruction

Refrigerant Quantity and Adding Procedures

Details refrigerant quantities, calculations for additional refrigerant, and charging instructions.

4 Installation Instruction

Refrigerant Calculation Example and Wiring

Provides a refrigerant calculation example and general guidelines for electric wiring.

4 Installation Instruction

Wiring Diagrams and Component Selection

Presents wiring diagrams and specifies circuit breaker capacity and power cord requirements.

4 Installation Instruction

Engineering Wiring Views

Illustrates engineering wiring views for power supply and communication cables.

5 Checks and Test Operation

Post-Installation Checks

A checklist of items to verify after installation to ensure proper functioning.

Test Operation Preparation

Steps and requirements for preparing the unit for test operation and debugging.

5 Checks and Test Operation

Test Operation and Debugging Procedures

Detailed procedures for conducting test operations and debugging the system, including specific codes.

5 Checks and Test Operation

Normal Operation Parameter Reference

A reference table of normal operating parameters for ODU and IDU.

6 Malfunctions and Troubleshooting

Troubleshooting Common Problems

A guide to common malfunctions, their causes, and recommended actions for troubleshooting.

7 Error Indication

Normal Operating Conditions

Lists conditions that may appear as malfunctions but are normal operations.

Indoor Unit Error Codes

Lists error codes specific to indoor units (IDUs) and their corresponding meanings.

7 Error Indication

Outdoor Unit Error Codes

Lists error codes specific to outdoor units (ODUs) and their corresponding meanings.

7 Error Indication

Debugging Error Codes and Status

Lists error codes and status indicators related to the system's debugging process.

8 Maintenance and Care

Outdoor Heat Exchanger Cleaning

Instructions for regularly cleaning the outdoor heat exchanger.

8 Maintenance and Care

Drain Pipe and Seasonal Checks

Guidance on drain pipe inspection and pre-seasonal use checks.

Post-Seasonal Maintenance and Parts

Recommended maintenance after seasonal use and information on obtaining spare parts.

9 After-sales Service

Warranty and Support Information

Outlines warranty conditions and how to contact customer support for service.