Daikin RXYP8KJ General Information Manual

R-407c

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Part 1 General Information

1. Product Outline

Overview of product series, models, and combinations.

1.2 Outline of New Series Products

Features of new series products, including function-unit-less structure and refrigerant.

1.3 Model Configuration and Combination

Details on connectable indoor units and their capacity combinations.

2. Points to Bear in Mind at the System Design

Key considerations for system design, performance, and installation.

3. Installation

Step-by-step installation procedures and work involved.

3.2 Work Involved in Individual Operations and Points to be Borne in Mind

Detailed tasks and considerations for individual installation operations.

3.2.1 Sleeve and Insert Work

Procedures for positioning pipe holes and inserts, including important points.

3.2.2 Installation of Indoor Unit

Steps and essential points for installing the indoor unit correctly.

3.2.3 Refrigerant Pipe Work

Critical steps and principles for refrigerant piping installation.

Method for Replacing Nitrogen (Brazing)

Standard work practice for brazing using nitrogen replacement.

Covering of Refrigerant Pipes

Importance and methods for covering refrigerant pipes to prevent contamination.

Refrigerant Pipe Flushing

Method and major effects of flushing refrigerant pipes to remove impurities.

Choice of Materials for Refrigerant Piping

Specifications for refrigerant piping material and joint types.

c) Brazing

Brazing methods, filler materials, and nozzle tip selection for piping.

Brazing

Best practices for brazing, including direction, support, and fire prevention.

Flare Connection

Procedures for making flare connections, including pipe preparation and torque.

Flaring Procedure

Step-by-step guide for performing the flaring procedure for pipe connections.

Tighten the Flare Nut with Proper Torque

Importance of proper torque for tightening flare nuts and emergency methods.

Flange Connection

Procedures for making flange connections, including cleaning and bolt tightening.

3.2.4 Thermal Insulation Work (Refrigerant Piping)

Materials and essential points for thermal insulation of refrigerant piping.

3.2.5 Air Tight Test

Procedure for conducting air-tightness tests to ensure system integrity.

Checking for Leaks

Methods for checking leaks, including by ear, hand, soap, and detector.

3.2.6 Vacuum Drying

Explanation of vacuum drying, its effects, and key points for achieving proper vacuum.

Choosing a Vacuum Pump

Guidelines for selecting vacuum pumps based on performance and degree of vacuum.

3. Degree of vacuum measurement

Importance of accurate vacuum measurement and calibration methods.

Vacuum Drying Procedure

Two methods for vacuum drying (normal and special) with operational steps.

Special vacuum drying

Method for special vacuum drying when moisture is suspected in pipes.

3.2.8 Drain Pipe Work Indoor units

Procedures for drain pipe installation in indoor units.

Piping Diameter for Grouped Drain Pipes

Selecting piping diameter for grouped drain pipes based on condensation.

3.2.9 Drain Piping for Each Model

Specific drain piping instructions for various indoor unit models.

FXYCP-2-way blow ceiling mounted cassette

Specific drain piping instructions for FXYCP-2-way blow cassette units.

FXYFP-4-way blow ceiling mounted cassette

Drain piping instructions for FXYFP-4-way blow cassette units.

Use of an Auxiliary Drain Hose (Flexible)

Importance and use of auxiliary drain hoses for polystyrene foam drain pans.

FXYKP-ceiling mounted corner cassette

Drain piping instructions for ceiling mounted corner cassette units.

FXYSP-Concealed ceiling unit

Drain piping installation for concealed ceiling units, including raising pipes.

3.2.10 Electrical Work

Guidelines for control wiring, compatible wire types, and cable problems.

Power Supply (Cabling of Main Power Supply)

Requirements for power circuits, circuit breakers, and cable selection.

Separation of Control and Power Supply Cables

Recommendations for spacing control and power cables to avoid interference.

3.2.11 Duct Work (Indoor)

Considerations for duct work, including canvas joints, airflow, and noise.

3.2.12 Installation of Outdoor Unit

Core procedures and requirements for installing the outdoor unit.

Foundation of Units

Requirements for unit foundations, including concrete mix and bolt pitch.

Caution in installation

Precautions during installation to avoid vibration, noise, and toppling.

Service Space

Importance of adequate space for servicing and maintenance of the equipment.

Prevention of Short Circuits

Measures to prevent short circuits by ensuring proper unit ventilation and spacing.

Techniques for Prevention of Snow Accumulation in Areas of High Snowfall

Methods to prevent snow accumulation around the outdoor unit in areas with heavy snowfall.

Selection of Location

Requirements for selecting an appropriate installation location for outdoor units.

4. Test Operation

Procedures and outlines for testing the system after installation.

4.1 Procedure and Outline

Overall procedure and outline for conducting test operations.

4.1.3 Check Operation

Steps for checking operation, including setting modes and verifying airflow.

4.2 Operation When Power is Turned On

Procedures for operating the unit when power is turned on for the first time or subsequently.

4.3 Outdoor Unit PC Board Ass’y

Diagram and identification of components on the outdoor unit PC board.

Outdoor unit Capacity setting switch

Switches for capacity setting on the outdoor unit PC board.

4.4 Setting Modes

Overview of the three setting modes and functions of pushbutton switches.

Mode Changing Procedure

Step-by-step procedure for changing setting modes using buttons and switches.

4.4.1 Setting Mode 1

Details on setting Mode 1 for cool/heat selection, low noise, and sequential start.

4.4.2 Setting Mode 2

Procedure for setting Mode 2, including setting items and LED displays.

4.4.3 Monitor Mode

How to enter and use Monitor Mode to check settings and unit status.

Monitor Mode Data

Table detailing monitor mode settings, LED displays, and binary number sizes.

4.5 Cool / Heat Mode Selection

Overview of the four cool/heat mode selection methods available.

4.5.2 Setting of Cool / Heat by Individual Outdoor Unit System by Cool/Heat Selector

Setting cool/heat mode using an individual outdoor unit and a cool/heat selector.

4.5.3 Setting of Cool / Heat by Outdoor Unit System Group in Accordance with Group Master Outdoor Unit by Indoor Unit Remote Control

Setting cool/heat mode for group systems using indoor remote control and group master.

Supplement

Supplement to group control settings for cool/heat mode selection using adaptor PCBs.

Setting Method 1.5.3 and 1.5.4 address setting method

Address setting method for group control using binary numbers for outdoor unit PCBs.

4.6 Low Noise Operation

How to activate low noise operation to save power and reduce noise.

4.7 Demand Control

Controlling compressor operating conditions for reduced power consumption via demand input.

4.8 Sequential Start

How sequential start prevents overcurrent and enables multiple unit startups.

4.9 Wiring Check Operation

Procedure for performing wiring check operation to detect miswiring.

4.10 Additional Refrigerant Charge Operation

Steps for performing additional refrigerant charge operation after leak test and vacuum drying.

4.11 Refrigerant Recovery Mode

Mode for fixing electronic expansion valves for refrigerant recovery.

4.12 Indoor Field Setting

How to perform field settings using wired remote control for optional accessories.

4.12.2 Wired Remote Control – Heat Recovery Ventilation

Setting procedure for Heat Recovery Ventilation using the wired remote control.

4.12.3 Infrared Remote Control — Indoor Unit

Field setting procedure for indoor units using infrared remote controls (BRC7A and BRC7C types).

4.12.4 Setting Contents and Code No. – VRV Unit

Table of setting contents and code numbers for VRV units, including filter and airflow settings.

4.12.5 Field Setting, Service Mode – Heat Recovery Ventilation (HRV)

Field setting and service mode procedures for Heat Recovery Ventilation units.

4.13 Centralized Control Group No. Setting

How to set the centralized control group number using remote controls.

BRC7C Type

Group number setting example for centralized control using BRC7C infrared remote control.

4.14 Contents of Control Modes

Explanation of twenty control modes based on combinations of operation modes.

How to Select Operation Mode

Guide on selecting operation modes based on remote control and central control settings.

5. Caution for Refrigerant Leaks

General precautions and introduction to refrigerant leak safety.

5.1 Caution for Refrigerant Leaks

General precautions and introduction to refrigerant leak safety.

5.1.2 Maximum Concentration Level

Understanding maximum refrigerant concentration levels and compliance requirements.

9.1.3 Procedure for Checking Maximum Concentration

Procedure to check maximum refrigerant concentration levels and system revision.

Step 5 Dealing with situations where the result exceeds the dangerous concentration level.

Actions to take when concentration levels exceed dangerous limits, including ventilation and alarms.

6. Hand Over to Customer

Steps for handing over the system, including test run reports and customer explanation.

6.1 Operational Steps

Steps for handing over the system, including test run reports and customer explanation.

7. Appendix

Supplementary data including noise levels, piping, diagrams, and inspection sheets.

7.1 Operating Noise of Indoor Units

Information on operating noise of indoor units and factors affecting it.

7.1.1 Difference between Catalogue Data and Actual Noise

Understanding the difference between catalogued noise data and actual measured noise.

7.1.2 Faint Noises and Correcting Operating Noise with Respect to Faint Noises

How faint noises affect operating noise measurements and correction methods.

7.1.3 Calculating Operating Noise

Method for calculating total operating noise when multiple units are running simultaneously.

7.2 Allowable Piping Length

Design points and limitations for allowable piping length and level differences.

7.3 Selection of Refrigerant Pipe Size

Table for selecting refrigerant pipe sizes based on indoor unit capacity and outdoor unit.

7.5 REFNET Pipe Connections for VRV R-407C PLUS Series

REFNET joint and header connection diagrams for cooling and heat pump systems.

7.5.2 REFNET HEADER (for Cooling Only and Heat Pump System)

Diagrams for REFNET headers with different branch fittings.

7.5.3 PIPE SIZE REDUCER (For R-407C)

Information on pipe size reducers for REFNET joints and headers.

7.5.4 Piping Kits for Side and Bottom Piping – Outdoor Unit

Details of piping kits for side and bottom connections to outdoor units.

REFNET Joint and Header Installation

Instructions for installing REFNET joints and headers, including horizontal and vertical mounting.

7.6 VRV Inspection Sheet

Template for VRV system inspection, covering outdoor and indoor units and field settings.

Before turning on the power

Inspection items and methods before initial power-on of the system.

During operation

Inspection items and measurement values during system operation.

During operation

Detailed inspection items for indoor units during operation, including voltage and temperature.

7.7 Piping System Diagrams

Piping system diagrams for indoor units.

7.7.2 Outdoor Unit

Piping system diagram for the RSXYP16-18-20KJY1 outdoor unit.

RSXYP24-26-28-30KJY1

Piping system diagram for the RSXYP24-26-28-30KJY1 outdoor unit.

7.8 Wiring Diagram

Wiring diagram for the RSXYP16-18-20KJY1 outdoor unit.

RSXYP24-26-28-30KJY1

Wiring diagram for the RSXYP24-26-28-30KJY1 outdoor unit.

7.9 Bad Examples and Good Examples in Installation

Examples of installation issues and their solutions for common problems.

7.9.2 Example 2: Mismatch between cables connecting indoor and outdoor units and corresponding piping.

Mismatch issues between connecting cables and piping for indoor/outdoor units.

7.9.3 Example 3: Drain pipe trap shape defective

Problem with defective drain pipe trap shape leading to leaks.

7.9.4 Example 4: Pressure down despite absence of leaks during air tight test (all model)

Pressure drop during air tight test despite no apparent leaks, possibly due to indoor unit leaks.

7.9.5 Example 5: Excessive noise due to incorrect angling of REFNET joints

Excessive noise caused by incorrect angling of REFNET joints during defrosting.

7.9.6 Example 6: Cracks develop in field pipes due to thermal expansion and contraction

Cracks in field pipes due to thermal expansion and contraction, causing leaks.

7.9.7 Example 7: Transmission wiring between the cool/heat selector and the outdoor unit is too close to a high voltage wire.

Transmission wiring interference due to proximity to high voltage wires causing cooling/heating malfunctions.

7.9.8 Example 8: The centralized control group number cannot be set (Inverter K Series).

Issue with setting centralized control group numbers, often due to incorrect wiring or power.

Part 2 Installation Manual

1. Introduction

Introduction to the installation manual for VRV plus series outdoor units.

1.1 Introduction

Overview of the installation manual for VRV plus series outdoor units.

1.2 Cautions in Installation

Essential safety precautions and warnings to be observed before and during installation.

1.3 Combination

Guidelines for combining outdoor units with indoor units based on capacity index.

1.4 Standard Operation Limit

Operating conditions and limits for cooling and heating based on temperature.

1.5 Standard Supplied Accessories

List of standard accessories supplied with the main and sub units.

1.6 Optional Accessories

List of optional refrigerant branch kits and pipe size reducers for R-407C.

1.7 Technical Specifications

General technical specifications for VRV plus series, including capacity, dimensions, and weight.

1.8 Electrical Specifications

Electrical specifications including power supply, frequency, voltage, and current ratings.

2. Main Components

Overview of main components and their functions.

3. Selection of Location

Guidelines for selecting the optimal installation location for outdoor units.

4. Inspecting and Handling the Unit

Steps for inspecting and handling the unit safely upon delivery.

5. Unpacking and Placing the Unit

Procedures for unpacking and safely placing the outdoor unit for installation.

6. Refrigerant Piping

Detailed guide to refrigerant piping, including material selection and connection.

6.1 Refrigerant Piping

General guidelines and precautions for refrigerant piping installation.

6.2 Selection of Piping Material

Material specifications for refrigerant piping and branch piping.

6.3 Connecting the Refrigerant Piping

Procedures for connecting refrigerant piping, including front, side, and bottom connections.

3. Bottom Connection

Specific instructions for bottom pipe connections, including bending and knock-out holes.

2. Piping Between Main Unit (RXYP-) and Sub Unit (RXEP-)

Connecting piping between main and sub outdoor units, including knock-out holes and cables.

5. Pipe Connection

Procedures for pipe connection, including flushing and nitrogen release during brazing.

6. Protection against Contamination when Installing Pipes

Measures to prevent foreign materials and moisture from entering pipes during installation.

6.4 Leak Test and Vacuum Drying

Procedures for performing leak tests using nitrogen and vacuum drying.

6.5 Pipe Insulation

Importance and methods for insulating refrigerant piping to prevent heat transfer and dewing.

6.6 Additional Refrigerant Charge

Procedures for charging additional refrigerant, including safety and method.

7. Field Wiring

General guidelines and precautions for field wiring installation.

7.1 Field Wiring

General guidelines and precautions for field wiring installation.

7.2 Internal Wiring

List of internal wiring components and their functions for RSXYP16, 18, 20 models.

RSXYP24, 26, 28, 30

List of internal wiring components and their functions for RSXYP24-30 models.

7.3 Optional Parts Cool/Heat Selector

Notes on using optional Cool/Heat selectors, including wiring and conductors.

7.4 Power Circuit and Cable Requirements

Requirements for power circuits, circuit breakers, and cable selection.

7.5 General

General wiring practices, including power connection, grounding, and inverter noise reduction.

7.6 Examples

Examples of system wiring and field line connections.

7.6.3 Field Line Connection between Main Unit (RXYP-) and Sub Unit (RXEP-)

Connecting main and sub outdoor units, including cable extension and ground wire connection.

7.6.4 Field Line Connection : Transmission Wiring and Cool/Heat Selection

Connecting transmission wiring and setting cool/heat mode using selector or remote control.

7.6.7 Sequential Start

Making outdoor unit cable connections for sequential start function.

7.6.8 Setting the Cool/Heat Operation

Setting the cool/heat operation using remote control or cool/heat selector.

7.6.9 Picking Power Line and Transmission Line

Routing power and transmission lines through conduit holes, separating wires, and securing lids.

8. Before Operation

Essential checks and procedures to perform before initial start-up.

8.1 Checks before Initial Start-Up

Essential checks before initial start-up, including switch settings, wiring, and insulation tests.

8.2 Test Run

Procedures for conducting a test run, including stop valve operation and power supply connection.

8.2.4 How to Operate Stop Valves

Step-by-step instructions for opening and closing stop valves, including torque and flare notes.

FLARE SHAPE and FLARENUT TIGHTENING TORQUE

Flare shape dimensions and torque specifications for tightening flare nuts.

8.2.5 Misswiring Check Operation

How to perform misswiring check operation and monitor connected indoor units.

9. Caution for Refrigerant Leaks

Important warnings and measures related to refrigerant leaks and concentration levels.

9.1 Caution for Refrigerant Leaks

General precautions and introduction to refrigerant leak safety.

5.1.2 Maximum Concentration Level

Understanding maximum refrigerant concentration levels and compliance requirements.

9.1.3 Procedure for Checking Maximum Concentration

Procedure to check maximum refrigerant concentration levels and system revision.

Step 5 Dealing with situations where the result exceeds the dangerous concentration level.

Actions to take when concentration levels exceed dangerous limits, including ventilation and alarms.

10. Appendix of Installation

Examples and additional information related to installation procedures.

10.1 Example of Connection

Example of connecting system components, likely referring to piping or wiring.

Daikin RXYP8KJ General Information Manual

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