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Fujitsu AJ*126LBTF User Manual

Fujitsu AJ*126LBTF
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En-1
English
Refrigerant
R410A
INSTALLATION INSTRUCTION SHEET
(PART NO. 9374241033)
Multi Air Conditioning System
for Buildings (VRF System)
OUTDOOR MODEL
AJ A72LBTF
MASTER AJ
A90LBTF
AJ
126LBTF
AJ
A72UBTF
SLAVE AJ
A90UBTF
AJ
126UBTF
Contents
1. SAFETY PRECAUTIONS ......................................................................... 2
2. PRECAUTIONS FOR USING THE ALTERNATIVE REFRIGERANT ....... 3
3. ACCESSORIES ........................................................................................ 4
4. INSTALLATION WORK ............................................................................ 5
4.1. SELECTING AN INSTALLATION LOCATION .............................................. 5
4.2. TRANSPORTING THE PRODUCT .............................................................. 6
4.3. INSTALLATION DIMENSIONS ..................................................................... 7
4.4 INSTALLATION THE UNIT ........................................................................... 9
4.5. SYSTEM LAYOUT ...................................................................................... 10
4.6. PIPE SELECTION...................................................................................... 11
4.7. PIPE INSTALLATION ................................................................................. 12
4.8. INSTALLING INSULATION ........................................................................ 17
4.9. DRAIN PROCESSING ............................................................................... 17
4.10. ELECTRICAL WIRING ............................................................................... 18
4.11. FIELD SETTING ........................................................................................ 23
5. CHARGING WITH REFRIGERANT ........................................................ 28
5.1. SEALING TEST ......................................................................................... 28
5.2. VACUUM PROCESS ................................................................................. 29
5.3. ADDITIONAL CHARGING ......................................................................... 29
6. TEST RUN ............................................................................................... 31
6.1. PRE-TEST RUN CHECK ITEMS ............................................................... 31
6.2. TEST RUN METHOD ................................................................................. 31
6.3. CHECKLIST ............................................................................................... 31
7. ERROR DISPLAY ................................................................................... 32
7.1. NORMAL OPERATION MODE .................................................................. 32
7.2. ERROR OPERATION MODE ..................................................................... 33
8. PUMP DOWN .......................................................................................... 34
9. OPTION PARTS ......................................................................................35
10. INFORMATION ....................................................................................... 36
9374241033_IM_en_p01-17.p65 26/8/2008, 18:231
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Fujitsu AJ*126LBTF Specifications

General IconGeneral
BrandFujitsu
ModelAJ*126LBTF
CategoryAir Conditioner
LanguageEnglish

Summary

Safety and Refrigerant Handling

WARNING! Safety Mark Interpretation

Explains procedures marked with WARNING for death or serious injury.

General Installation Safety Practices

Covers using correct parts, tools, and electrical safety for installation.

Installation Location and Environment Cautions

Details areas to avoid for installation and environmental considerations.

R410A Refrigerant Specific Precautions

Discusses higher pressure, special tools, and handling procedures for R410A.

Special Tools for R410A Refrigerant

Lists essential tools for working with R410A refrigerant.

Installation Procedures

Supplied Accessories and Parts

Lists components included with the unit for installation.

Site Selection and Preparation

Guidelines for choosing an appropriate installation site and preparing the area.

Product Transportation Methods

Procedures for safely moving the outdoor unit using ropes or forklifts.

Installation Dimensions and Space Requirements

Specifies clearances and dimensions for unit installations.

Unit Mounting and System Layout

Instructions on mounting the unit and planning piping configurations for multiple units.

Pipe Selection and Installation

Covers pipe sizing, materials, brazing, flare connections, and routing for optimal performance.

Multiple Unit Connections and Insulation

Details connecting multiple outdoor units, insulation, and drain processing.

Drain Processing and Insulation

Methods for handling condensate drainage and insulating refrigerant pipes.

Electrical Wiring and Field Settings

Electrical Wiring Safety and Requirements

Safety rules, power supply requirements, and grounding for electrical wiring.

Wiring and Breaker Selection Guidelines

Tables providing guidance on wire sizing, breaker capacity, and transmission cables.

Wiring Methods and Examples

Diagrams and steps for connecting power and transmission cables to units.

Field Setting and Switch Configuration

Introduces field setting and covers DIP and rotary switch functions for unit configuration.

Rotary Switch for Circuit Address Setting

Explains how to set refrigerant circuit addresses using rotary switches.

Terminal Resistor Installation

Guidelines for installing the termination resistor on the transmission line.

Operation and Troubleshooting

Refrigerant Charging Procedures

Covers sealing tests, vacuum process, and adding refrigerant.

Additional Refrigerant Calculation

Formula and example for calculating the required additional refrigerant charge.

Test Run Procedures and Checks

Procedures and criteria for verifying unit operation after installation.

LED Indicators for Operation and Errors

Explains LED patterns for normal operation and various system error conditions.

Pump Down Procedure (Refrigerant Recovery)

Steps for recovering refrigerant from the unit before moving or discarding it.

Optional Parts and Information

Optional Accessories List

Lists optional kits like separation tubes and headers for connecting multiple units.

Product Label Information Details

Explains the meaning of various items found on the unit's label.

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