Fujitsu Airstage J-II Series Service manual

Small VRF system
for light commercial and home use
DESIGN & TECHNICAL MANUAL

CONTENTS
1. GENERAL INFORMATION
2. MODEL SELECTION
3. OUTDOOR UNITS
4. INDOOR UNITS
4. CONTROL SYSTEM
6. SYSTEM DESIGN
5. FUNCTION SETTING
8. EXTERNAL INPUT & OUTPUT
9. NOTES
10. OPTIONAL PARTS

CONTENTS
1. GENERAL INFORMATION
1. MODEL LINE UP....................................................................... 01-03
1-1. OUTDOOR UNIT .............................................................................................01-03
1-2. INDOOR UNIT .................................................................................................01-04
1-3. CONTROLLER ................................................................................................01-07
1-4. ADAPTOR / CONVERTOR / MAINTENANCE TOOL.....................................01-09
1-5. BRANCH KIT...................................................................................................01-11
1-6. CASSETTE GRILLE........................................................................................01-12
1-7. OTHERS (optional parts)...............................................................................01-13

CONTENTS
2. MODEL SELECTION
1. MODEL SELECTION PROCEDURE............................................. 02 - 01
2. MODEL LINE UP........................................................................... 02 - 02
2-1. OUTDOOR UNIT............................................................................... 02 - 02
2-2. INDOOR UNIT................................................................................... 02 - 03
2-3. OPTIONAL PARTS........................................................................... 02 - 05
3. MODEL SELECTION AND CAPACITY CALCULATION .............. 02 - 07
3-1. SELECTION PROCEDURE OF INDOOR UNIT AND OUTDOOR UNIT...
........................................................................................................... 02 - 07
3-2. METHOD OF CAPACITY CALCULATION ....................................... 02 - 09
3-3. THE EXAMPLE OF CALCULATION ................................................ 02 - 10
4. CAPACITY TABLE COOLING (OUTDOOR UNIT) ....................... 02 - 12
5. CAPACITY TABLE HEATING (OUTDOOR UNIT) ........................ 02 - 21
6. CAPACITY COMPENSATION COEFFICIENT.............................. 02 - 27
7. CAPACITY TABLE COOLING (INDOOR UNIT) ........................... 02 - 29
7-1. COMPACT CASSETTE TYPE.......................................................... 02 - 29
7-2. CIRCULAR FLOW CASSETTE TYPE ............................................. 02 - 31
7-3. CASSETTE TYPE............................................................................. 02 - 33
7-4. MINI DUCT TYPE ............................................................................. 02 - 35
7-5. SLIM DUCT / SLIM CONCEALED FLOOR TYPE ........................... 02 - 36
7-6. MEDIUM STATIC PRESSURE DUCT TYPE .................................... 02 - 38
7-7. HIGH STATIC PRESSURE DUCT TYPE.......................................... 02 - 39
7-8. VERTICAL AIR HANDLER TYPE .................................................... 02 - 40
7-9. COMPACT FLOOR TYPE ................................................................ 02 - 42
7-10. FLOOR / CEILING TYPE.................................................................. 02 - 44
7-11. CEILING TYPE ................................................................................. 02 - 45
7-12. WALL MOUNTED TYPE................................................................... 02 - 46

CONTENTS
2. MODEL SELECTION
8. CAPACITY TABLE HEATING (INDOOR UNIT) ............................ 02 - 51
8-1. COMPACT CASSETTE TYPE.......................................................... 02 - 51
8-2. CIRCULAR FLOW CASSETTE TYPE ............................................. 02 - 53
8-3. CASSETTE TYPE............................................................................. 02 - 55
8-4. MINI DUCT TYPE ............................................................................. 02 - 57
8-5. SLIM DUCT / SLIM CONCEALED FLOOR TYPE ........................... 02 - 58
8-6. MEDIUM STATIC PRESSURE DUCT TYPE .................................... 02 - 60
8-7. HIGH STATIC PRESSURE DUCT TYPE.......................................... 02 - 61
8-8. VERTICAL AIR HANDLER TYPE .................................................... 02 - 62
8-9. COMPACT FLOOR TYPE ................................................................ 02 - 64
8-10. FLOOR / CEILING TYPE.................................................................. 02 - 66
8-11. CEILING TYPE ................................................................................. 02 - 67
8-12. WALL MOUNTED TYPE................................................................... 02 - 68

CONTENTS
3. OUTDOOR UNITS
1. SPECIFICATIONS .................................................................... 03 - 01
2. DIMENSIONS ........................................................................... 03 - 03
3. INSTALLATION SPACE ........................................................... 03 - 04
3-1. SINGLE OUTDOOR UNIT INSTALLATION ................................................. 03 - 04
3-2. MULTIPLE OUTDOOR UNIT INSTALLATION............................................. 03 - 05
3-3. OUTDOOR UNITS INSTALLATION IN MULTI ROW................................... 03 - 05
4. REFRIGERANT CIRCUIT ........................................................ 03 - 06
5. WIRING DIAGRAM .................................................................. 03 - 08
6. OPERATION RANGE............................................................... 03 - 10
7. NOISE LEVEL CURVE............................................................. 03 - 11
8. ELECTRIC CHARACTERISTICS............................................. 03 - 14
9. SAFETY DEVICES ................................................................... 03 - 15

CONTENTS
4. INDOOR UNITS
1. SPECIFICATIONS .................................................................... 04-01
1-1. COMPACT CASSETTE TYPE........................................................................04-01
1-2. CIRCULAR FLOW CASSETTE TYPE ...........................................................04-03
1-3. CASSETTE TYPE...........................................................................................04-04
1-4. MINI DUCT TYPE ...........................................................................................04-06
1-5. SLIM DUCT / SLIM CONCEALED FLOOR TYPE .........................................04-07
1-6. MEDIUM STATIC PRESSURE DUCT TYPE..................................................04-09
1-7. HIGH STATIC PRESSURE DUCT TYPE .......................................................04-10
1-8. VERTICAL AIR HANDLER TYPE ..................................................................04-12
1-9. COMPACT FLOOR TYPE ..............................................................................04-14
1-10. FLOOR / CEILING TYPE................................................................................04-15
1-11. CEILING TYPE ...............................................................................................04-16
1-12. WALL MOUNTED TYPE ...............................................................................04-17
2. ELECTRIC CHARACTERISTICS............................................. 04-22
3. DIMENSIONS ........................................................................... 04-24
3-1. COMPACT CASSETTE TYPE........................................................................04-24
3-2. CIRCULAR FLOW CASSETTE TYPE ...........................................................04-26
3-3. CASSETTE TYPE...........................................................................................04-30
3-4. MINI DUCT TYPE ...........................................................................................04-33
3-5. SLIM DUCT / SLIM CONCEALED FLOOR TYPE .........................................04-35
3-6. MEDIUM STATIC PRESSURE DUCT TYPE..................................................04-39
3-7. HIGH STATIC PRESSURE DUCT TYPE .......................................................04-41
3-8. VERTICAL AIR HANDLER TYPE ..................................................................04-46
3-9. COMPACT FLOOR TYPE .............................................................................04-52
3-10. FLOOR / CEILING TYPE................................................................................04-54
3-11. CEILING TYPE ...............................................................................................04-56
3-12. WALL MOUNTED TYPE ................................................................................04-58

CONTENTS
4. INDOOR UNITS
4. WIRING DIAGRAMS................................................................ 04-70
4-1. COMPACT CASSETTE TYPE........................................................................04-70
4-2. CIRCULAR FLOW CASSETTE TYPE ...........................................................04-72
4-3. CASSETTE TYPE...........................................................................................04-73
4-4. MINI DUCT TYPE ...........................................................................................04-74
4-5. SLIM DUCT / SLIM CONCEALED FLOOR TYPE .........................................04-75
4-6. MEDIUM STATIC PRESSURE DUCT TYPE..................................................04-76
4-7. HIGH STATIC PRESSURE DUCT TYPE .......................................................04-77
4-8. VERTICAL AIR HANDLER TYPE ..................................................................04-79
4-9. COMPACT FLOOR TYPE ..............................................................................04-80
4-10. FLOOR / CEILING TYPE................................................................................04-81
4-11. CEILING TYPE ...............................................................................................04-82
4-12. WALL MOUNTED TYPE ................................................................................04-83
5. AIR VELOCITY AND TEMPERATURE DISTRIBUTIONS ........ 04-89
5-1. COMPACT CASSETTE TYPE........................................................................04-89
5-2. CIRCULAR FLOW CASSETTE TYPE ......................................................... 04-103
5-3. CASSETTE TYPE......................................................................................... 04-113
5-4. MINI DUCT TYPE with Auto louver grille kit ............................................. 04-121
5-5. SLIM DUCT TYPE with Auto louver grille kit ............................................ 04-123
5-6. COMPACT FLOOR TYPE ...........................................................................04-133
5-7. FLOOR / CEILING TYPE.............................................................................. 04-137
5-8. CEILING TYPE .............................................................................................04-143
5-9. WALL MOUNTED TYPE ............................................................................. 04-145
6. FAN PERFORMANCE CURVE ................................................ 04-159
6-1. MINI DUCT TYPE .........................................................................................04-159
6-2. SLIM DUCT / SLIM CONCEALED FLOOR TYPE ....................................... 04-161
6-3. MEDIUM STATIC PRESSURE DUCT TYPE................................................ 04-171
6-4. HIGH STATIC PRESSURE DUCT TYPE ..................................................... 04-177
6-5. VERTICAL AIR HANDLER TYPE ................................................................04-184
6-6. CEILING TYPE (FRESH AIR) ......................................................................04-198
6-7. CASSETTE TYPE (FRESH AIR).................................................................. 04-199

CONTENTS
4. INDOOR UNITS
7. AIR FLOW ............................................................................... 04-200
8. NOISE LEVEL CURVE............................................................. 04-202
8-1. COMPACT CASSETTE TYPE...................................................................... 04-202
8-2. CIRCULAR FLOW CASSETTE TYPE ......................................................... 04-204
8-3. CASSETTE TYPE.........................................................................................04-206
8-4. MINI DUCT TYPE .........................................................................................04-207
8-5. SLIM DUCT / SLIM CONCEALED FLOOR TYPE ....................................... 04-208
8-6. MEDIUM STATIC PRESSURE DUCT TYPE................................................ 04-210
8-7. HIGH STATIC PRESSURE DUCT TYPE ..................................................... 04-211
8-8. VERTICAL AIR HANDLER TYPE ................................................................04-213
8-9. COMPACT FLOOR TYPE ............................................................................04-215
8-10. FLOOR / CEILING TYPE..............................................................................04-217
8-11. CEILING TYPE .............................................................................................04-218
8-12. WALL MOUNTED TYPE .............................................................................. 04-219
9. SAFETY DEVICES ................................................................... 04-225

CONTENTS
3. OUTDOOR UNITS
1. SPECIFICATIONS .................................................................... 03 - 01
2. DIMENSIONS ........................................................................... 03 - 03
3. INSTALLATION SPACE ........................................................... 03 - 04
3-1. SINGLE OUTDOOR UNIT INSTALLATION ................................................. 03 - 04
3-2. MULTIPLE OUTDOOR UNIT INSTALLATION............................................. 03 - 05
3-3. OUTDOOR UNITS INSTALLATION IN MULTI ROW................................... 03 - 05
4. REFRIGERANT CIRCUIT ........................................................ 03 - 06
5. WIRING DIAGRAM .................................................................. 03 - 08
6. OPERATION RANGE............................................................... 03 - 10
7. NOISE LEVEL CURVE............................................................. 03 - 11
8. ELECTRIC CHARACTERISTICS............................................. 03 - 14
9. SAFETY DEVICES ................................................................... 03 - 15