VRF Design

VRF Design Installation & Commissioning

Course Length: 12 Hours

Time: 8:30 PM to 10:00 PM

Mode: Online

Schedule: 7,9,12,14,16,19,21,23 April

Class Recordings: Provided

Certificate Accreditation: ISO 29993:2017

Course Fee: 6,000 BDT

Course Briefing

This comprehensive course covers the essential aspects of Variable Refrigerant Flow (VRF) systems, focusing on design, installation, testing, and commissioning. Participants will gain practical knowledge and skills to work with VRF technology, widely used in modern HVAC systems. The course is designed for professionals looking to enhance their expertise in VRF system integration and ensure effective and efficient system performance.

Course Objectives:

Understand VRF Systems: Learn the components and working principles of VRF technology.
Design and Install VRF Systems: Gain the skills to design and install VRF systems effectively.
Testing and Troubleshooting: Master techniques for diagnosing and ensuring proper system performance.
Commissioning Expertise: Learn how to properly start up and optimize VRF systems for efficiency.
System Optimization: Ensure maximum energy efficiency and reliable performance in VRF systems.

Course Outline

1.0 VRF System and Equipment

Introduction to VRF

Basic Working Principle Types of VRF Systems

Major Components of VRF System

VRF Control Philosophy

Advantages and Limitations

Typical Applications

Common Design Considerations

2.0 Load Calculation Part – 1

Introduction to HVAC Load Calculation

Importance of Load Calculation in VRF

Design Criteria and Indoor/Outdoor Conditions

Sensible Heat Load Components

Building Envelope Heat Gain

Internal Sensible Loads

Ventilation Impact on Sensible

Sensible & Latent Load Calculations

3.0 Load Calculation Part – 2

Latent Heat Load Basics

Latent Load Sources

Ventilation and Fresh Air

Load Infiltration Load

Room Sensible Heat (RSH),

Room Latent Heat (RLH),

Room Total Heat (RTH)

Sensible Heat Ratio (SHR)

Diversity in VRF Load Planning

Final Room Load Summary Preparation

Indoor Unit Sizing Basis

4.0 System and Equipment Selection

Indoor Unit Selection

Outdoor Unit Selection

Capacity Matching and Diversity Ratio

Performance Correction Factors

Heat Pump vs Heat Recovery Selection

Refrigerant Piping Network Design

Refnet Joint and Header Selection

Pipe Length and Height Limitation Checks

Control System Selection

Fresh Air Integration with VRF

Selection Workflow from Load to Equipment Schedule

5.0 VRF BOQ Preparation

Introduction to BOQ in HVAC Projects

BOQ Structure for VRF System

Equipment BOQ Items

Refrigerant Piping BOQ

Refnet Joints and Headers in BOQ

Insulation BOQ

Drain and Condensate System BOQ

Electrical and Controls BOQ

Installation Accessories BOQ

BOQ Measurement Rules

Sample VRF BOQ Preparation

6.0 VRF Installation

Installation Planning and Coordination

Outdoor Unit Installation

Indoor Unit Installation

Refrigerant Piping Installation

Copper Pipe Handling and Brazing

Nitrogen Purging During Brazing

Refnet Installation Best Practices

Pipe Support and Insulation Installation

Pressure Testing and Leak Testing

Vacuum and Dehydration Procedure

Refrigerant Charging

Electrical and Communication Wiring

Pre-Commissioning Checklist

Common Installation Mistakes

7.0 Sample Project Discussion and Case Study

8.0 ASHRAE 41 for VRF Installation Testing & Commissioning

Cetification Pre-Requisite:

A four-year degree
12 months of hands on experince
12 hours of class room training

— OR —

A diploma or an associate’s degree (or global equivalent)
60 months hands on experince
30 hours of class room training

Evaluation

Learning outcomes are evaluated through a psychometric test.
60-minute online AI proctored test.
Multiple choice question.
No negative marking.
Questions are in four primary domains Basic, Air Distribution, Load Calculation & Piping.
Attend exams from anywhere.

12 Hr

Total Training

6 Hr

Assignments

30 Min

Quiz

1Hr

Final Evaluation