Fujitsu ARU24RGLX Service manual

AIR CONDITIONER
Duct type
DESIGN & TECHNICAL MANUAL
INDOOR
ARU12RGLX ARU18RGLX
ARU24RGLX
ARU30RGLX
ARU36RGLX
ARU42RGLX
ARU48RGLX
OUTDOOR
AOU12RLFC AOU18RGLX
AOU24RGLX
AOU30RGLX
AOU36RGLX
AOU42RGLX
AOU48RGLX
DR_AR025EF_04
2019.07.01

Notices:
• Product specifications and design are subject to change without notice for future improvement.
• For further details, please check with our authorized dealer.
Copyright © 2019 Fujitsu General Limited. All rights reserved.

CONTENTS
Part 1. INDOOR UNIT...........................................................................1
1. Specifications................................................................................................2
2. Dimensions....................................................................................................8
2-1. Model: ARU12RGLX........................................................................................................8
2-2. Models: ARU18RGLX, ARU24RGLX, and ARU30RGLX.................................................9
2-3. Models: ARU36RGLX, ARU42RGLX, and ARU48RGLX...............................................10
2-4. Installation space requirement .......................................................................................11
2-5. Maintenance space requirement....................................................................................12
3. Wiring diagrams ..........................................................................................13
3-1. Models: ARU12RGLX, ARU18RGLX, and ARU24RGLX...............................................13
3-2. Models: ARU30RGLX, ARU36RGLX, ARU42RGLX, and ARU48RGLX .......................14
4. Capacity table..............................................................................................15
4-1. Cooling capacity.............................................................................................................15
4-2. Heating capacity ............................................................................................................22
5. Fan performance .........................................................................................26
5-1. Fan performance curve..................................................................................................26
5-2. Airflow ............................................................................................................................40
6. Operation noise (sound pressure).............................................................47
6-1. Noise level curve............................................................................................................47
6-2. Sound level check point .................................................................................................50
7. Safety devices .............................................................................................51
8. External input and output...........................................................................52
8-1. External input.................................................................................................................52
8-2. External output...............................................................................................................54
8-3. Combination of external input and output.......................................................................55
8-4. Details of function ..........................................................................................................58
9. Function settings ........................................................................................83
9-1. Function settings on indoor unit .....................................................................................83
9-2. Function settings by using remote controller..................................................................85
10. Accessories.................................................................................................93
11. Optional parts .............................................................................................94
11-1.Controllers ....................................................................................................................94
11-2.Others ...........................................................................................................................95

Part 2. OUTDOOR UNIT.....................................................................97
1. Specifications..............................................................................................98
2. Dimensions................................................................................................101
2-1. Model: AOU12RLFC....................................................................................................101
2-2. Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX.....................102
2-3. Models: AOU42RGLX and AOU48RGLX ....................................................................103
3. Installation space ......................................................................................104
3-1. Model: AOU12RLFC....................................................................................................104
3-2. Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX.....................107
3-3. Models: AOU42RGLX and AOU48RGLX ....................................................................110
4. Refrigerant circuit .....................................................................................113
4-1. Model: AOU12RLFC....................................................................................................113
4-2. Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX.....................114
4-3. Models: AOU42RGLX and AOU48RGLX ....................................................................115
5. Wiring diagrams ........................................................................................116
5-1. Model: AOU12RLFC....................................................................................................116
5-2. Model: AOU18RGLX....................................................................................................117
5-3. Models: AOU24RGLX, AOU30RGLX, and AOU36RGLX ............................................118
5-4. Models: AOU42RGLX and AOU48RGLX ....................................................................119
6. Capacity compensation rate for pipe length and height difference......120
6-1. Model: AOU12RLFC....................................................................................................120
6-2. Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX.....................121
6-3. Models: AOU42RGLX and AOU48RGLX ....................................................................122
7. Additional charge calculation ..................................................................123
7-1. Model: AOU12RLFC....................................................................................................123
7-2. Model: AOU18RGLX....................................................................................................123
7-3. Models: AOU24RGLX, AOU30RGLX, and AOU36RGLX ............................................123
7-4. Models: AOU42RGLX and AOU48RGLX ....................................................................124
8. Airflow........................................................................................................125
8-1. Model: AOU12RLFC....................................................................................................125
8-2. Model: AOU18RGLX....................................................................................................125
8-3. Model: AOU24RGLX....................................................................................................125
8-4. Model: AOU30RGLX....................................................................................................126
8-5. Model: AOU36RGLX....................................................................................................126
8-6. Model: AOU42RGLX....................................................................................................126
8-7. Model: AOU48RGLX....................................................................................................127
9. Operation noise (sound pressure)...........................................................128
9-1. Noise level curve..........................................................................................................128
9-2. Sound level check point ...............................................................................................131
10. Electrical characteristics..........................................................................132
CONTENTS (continued)

11. Safety devices ...........................................................................................133
12. External input and output (For AOU42RGLX and AOU48RGLX)...........135
12-1.External input..............................................................................................................135
12-2.External output............................................................................................................137
13. Function settings (For AOU42RGLX and AOU48RGLX) ........................139
13-1.Local setting switch buttons ........................................................................................139
13-2.Local setting procedure...............................................................................................141
14. Accessories...............................................................................................144
14-1.Model: AOU12RLFC...................................................................................................144
14-2.Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX....................144
14-3.Models: AOU42RGLX and AOU48RGLX ...................................................................144
15. Optional parts ...........................................................................................145
CONTENTS (continued)

Part 1. INDOOR UNIT
DUCT TYPE:
ARU12RGLX
ARU18RGLX
ARU24RGLX
ARU30RGLX
ARU36RGLX
ARU42RGLX
ARU48RGLX

1. Specifications
Type
Duct
Inverter heat pump
Model name ARU12RGLX
Power supply 208/230 V ~ 60 Hz
Power supply intake Outdoor unit
Available voltage range 187—253 V
Capacity
Cooling
Rated kW 3.52
Btu/h 12,000
Min.—Max. kW 0.9—4.0
Btu/h 3,100—13,600
Heating
47 °FDB
(Outdoor temp.)
Rated kW 4.69
Btu/h 16,000
Min.—Max. kW 0.9—5.7
Btu/h 3,100—19,400
17 °FDB
(Outdoor temp.)
Rated kW 4.27
Btu/h 14,500
Max. kW 5.18
Btu/h 17,600
Input power
Cooling Rated
kW
0.89
Min.—Max. 0.12—1.45
Heating
47 °FDB
(Outdoor temp.)
Rated 1.20
Min.—Max. 0.14—1.84
17 °FDB
(Outdoor temp.)
Rated 1.28
Max. 1.97
Fan
HIGH
W
61
MED 34
LOW 24
QUIET 16
Current Cooling Rated A 3.9
Heating 5.3
EER Cooling kW/kW 3.93
Btu/hW 13.4
COP Heating kW/kW 3.90
Btu/hW 13.3
SEER Cooling Btu/hW 21.3
HSPF Heating 11.7
Power factor Cooling %99.2
Heating 98.4
Moisture removal pints/h (L/h) 1.5 (0.7)
Maximum operating current *1Cooling A9.4
Heating 10.9
Fan
Airflow rate
Cooling
HIGH
CFM (m3/h)
500 (850)
MED 400 (680)
LOW 347 (590)
QUIET 300 (510)
Heating
HIGH 500 (850)
MED 400 (680)
LOW 347 (590)
QUIET 300 (510)
Type × Q'ty Sirocco fan × 1
Motor output W 154
Static pressure range Pa 30 to 200
Sound pressure level *2
Cooling
HIGH
dB (A)
35
MED 30
LOW 27
QUIET 24
Heating
HIGH 35
MED 30
LOW 27
QUIET 24
Heat exchanger type
Dimensions (H × W × D) in (mm) 16-9/16 × 18-1/16 × 1-9/16 (420 × 458 × 39.9)
Fin pitch FPI 18
Rows × Stages 3 × 20
Pipe type Copper
Fin type Aluminum
Hydrophilic coating
Enclosure Material Steel
Color ―
Dimensions
(H × W × D)
Net in (mm) 11-13/16 × 27-9/16 × 27-9/16 (300 × 700 × 700)
Gross 15-3/4 × 36-15/16 × 34-7/16 (400 × 938 × 875)
Weight Net lb (kg) 66 (30)
Gross 82 (37)
Connection pipe Size Liquid in (mm) Ø 1/4 (Ø 6.35)
Gas Ø 3/8 (Ø 9.52)
Method Flare
Drain hose Material PVC
Size in (mm) Ø 13/16 (20.7) [I.D.], Ø 1-1/16 (26.6) [O.D.] (VP25)
Operation range Cooling °F (°C) 64.4 to 89.6 (18 to 32)
%RH 80 or less
Heating °F (°C) 60.8 to 86.0 (16 to 30)
- 2 - 1. Specifications
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

Type
Duct
Inverter heat pump
Model name ARU12RGLX
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80 °FDB/67 °FWB (26.67 °CDB/19.44 °CWB), and outdoor temperature of 95 °FDB/75 °FWB (35 °CDB/23.9 °CWB).
– Heating: Indoor temperature of 70 °FDB/59 °FWB (21.11 °CDB/15 °CWB), and outdoor temperature of 47 °FDB/43 °FWB (8.33 °CDB/6.11 °CWB).
– Pipe length: 24 ft 7 in (7.5 m), Height difference: 0 ft (0 m). (Between outdoor unit and indoor unit.)
– Standard static pressure: 0.18 in.WG (45 Pa)
• Protective function might work when using it outside the operation range.
• *1: Maximum current:
– The maximum value when operated within the operation range.
– The total current of indoor unit and outdoor unit.
• *2: Sound pressure level:
– Measured values in manufacturer’s anechoic chamber.
– Because of the surrounding sound environment, the sound levels measured in actual installation conditions might be higher than the specified values here.
- 3 - 1. Specifications
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

Type
Duct
Inverter heat pump
Model name ARU18RGLX ARU24RGLX ARU30RGLX
Power supply 208/230 V ~ 60 Hz
Power supply intake Outdoor unit
Available voltage range 187—253 V
Capacity
Cooling
Rated kW 5.28 7.03 8.79
Btu/h 18,000 24,000 30,000
Min.—Max. kW 1.58—6.30 1.58—8.5 2.81—10.26
Btu/h 5,400—21,500 5,400—29,000 9,600—35,000
Heating
47 °FDB
(Outdoor temp.)
Rated kW 6.15 7.91 9.38
Btu/h 21,000 27,000 32,000
Min.—Max. kW 1.58—7.5 1.58—9.5 2.7—11.43
Btu/h 5,400—25,600 5,400—32,400 9,200—39,000
17 °FDB
(Outdoor temp.)
Rated kW 4.76 6.07 7.25
Btu/h 16,200 20,700 24,700
Max. kW 5.81 7.29 8.83
Btu/h 19,800 24,800 30,100
Input power
Cooling Rated
kW
1.38 1.90 2.83
Min.—Max. 0.53—2.08 0.63—2.82 0.70—3.43
Heating
47 °FDB
(Outdoor temp.)
Rated 1.50 2.06 2.48
Min.—Max. 0.51—2.19 0.54—2.96 0.62—3.27
17 °FDB
(Outdoor temp.)
Rated 1.49 2.36 2.53
Max. 2.17 3.39 3.33
Fan
HIGH
W
53 84 139
MED 30 44 79
LOW 22 27 58
QUIET 15 15 46
Current Cooling Rated A 6.1 8.3 12.4
Heating 6.6 9.0 10.9
EER Cooling kW/kW 3.81 3.69 3.11
Btu/hW 13.0 12.6 10.6
COP Heating kW/kW 4.10 3.84 3.78
Btu/hW 14.0 13.1 12.9
SEER Cooling Btu/hW 19.0 17.5 16.5
HSPF Heating 10.9 10.8 10.4
Power factor Cooling %98.4 99.5 99.2
Heating 98.8 99.5 98.9
Moisture removal pints/h (L/h) 3.8 (1.8) 4.0 (1.9) 5.1 (2.4)
Maximum operating current *1Cooling A13.6 15.6 15.6
Heating 14.1 16.1 16.1
Fan
Airflow rate
Cooling
HIGH
CFM (m3/h)
618 (1,050) 800 (1,360) 1,001(1,700)
MED 494 (840) 636 (1,080) 800 (1,360)
LOW 430 (730) 518 (880) 700 (1,190)
QUIET 371 (630) 400 (680) 630 (1,070)
Heating
HIGH 618 (1,050) 800 (1,360) 1,001(1,700)
MED 494 (840) 636 (1,080) 800 (1,360)
LOW 430 (730) 518 (880) 700 (1,190)
QUIET 371 (630) 400 (680) 630 (1,070)
Type × Q'ty Sirocco fan × 2
Motor output W 197 375
Static pressure range Pa 30 to 200
Sound pressure level *2
Cooling
HIGH
dB (A)
31 35 38
MED 28 30 34
LOW 25 28 30
QUIET 24 24 29
Heating
HIGH 31 35 38
MED 28 30 34
LOW 25 28 30
QUIET 24 24 29
Heat exchanger type
Dimensions (H × W × D) in (mm) 16-9/16 × 29-13/16 × 1-9/16 (420 × 758 × 39.9)
Fin pitch FPI 18
Rows × Stages 3 × 20
Pipe type Copper
Fin type Aluminum
Hydrophilic coating
Enclosure Material Steel
Color ―
Dimensions
(H × W × D)
Net in (mm) 11-13/16 × 39-3/8 × 27-9/16 (300 × 1,000 × 700)
Gross 15-3/4 × 48-3/4 × 34-7/16 (400 × 1,238 × 875)
Weight Net lb (kg) 93 (42)
Gross 110 (50)
Connection pipe Size Liquid in (mm) Ø 1/4 (Ø 6.35) Ø 3/8 (Ø 9.52)
Gas Ø 1/2 (Ø 12.7) Ø 5/8 (Ø 15.88)
Method Flare
Drain hose Material PVC
Size in (mm) Ø 13/16 (20.7) [I.D.], Ø 1-1/16 (26.6) [O.D.] (VP25)
Operation range Cooling °F (°C) 64.4 to 89.6 (18 to 32)
%RH 80 or less
Heating °F (°C) 60.8 to 86.0 (16 to 30)
- 4 - 1. Specifications
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

Type
Duct
Inverter heat pump
Model name ARU18RGLX ARU24RGLX ARU30RGLX
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80 °FDB/67 °FWB (26.67 °CDB/19.44 °CWB), and outdoor temperature of 95 °FDB/75 °FWB (35 °CDB/23.9 °CWB).
– Heating: Indoor temperature of 70 °FDB/59 °FWB (21.11 °CDB/15 °CWB), and outdoor temperature of 47 °FDB/43 °FWB (8.33 °CDB/6.11 °CWB).
– Pipe length: 24 ft 7 in (7.5 m), Height difference: 0 ft (0 m). (Between outdoor unit and indoor unit.)
– Standard static pressure: 0.18 in.WG (45 Pa): 18, and 24 model, 0.23 in.WG (57 Pa): 30 model
• Protective function might work when using it outside the operation range.
• *1: Maximum current:
– The maximum value when operated within the operation range.
– The total current of indoor unit and outdoor unit.
• *2: Sound pressure level:
– Measured values in manufacturer’s anechoic chamber.
– Because of the surrounding sound environment, the sound levels measured in actual installation conditions might be higher than the specified values here.
- 5 - 1. Specifications
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

Type
Duct
Inverter heat pump
Model name ARU36RGLX ARU42RGLX ARU48RGLX
Power supply 208/230 V ~ 60 Hz
Power supply intake Outdoor unit
Available voltage range 187—253 V
Capacity
Cooling
Rated kW 10.55 12.31 14.07
Btu/h 36,000 42,000 48,000
Min.—Max. kW 2.81—11.43 5.01—13.19 5.01—14.65
Btu/h 9,600—39,000 17,100—45,000 17,100—50,000
Heating
47 °FDB
(Outdoor temp.)
Rated kW 10.55 13.77 15.50
Btu/h 36,000 47,000 53,000
Min.—Max. kW 2.7—14.07 5.28—14.95 5.28—16.12
Btu/h 9,200—48,000 18,000—51,000 18,000—55,000
17 °FDB
(Outdoor temp.)
Rated kW 8.10 11.12 12.00
Btu/h 27,600 37,900 40,900
Max. kW 10.8 12.07 12.48
Btu/h 36,800 41,100 42,500
Input power
Cooling Rated
kW
3.60 3.65 4.75
Min.—Max. 0.70—4.00 0.75—4.47 0.75—5.01
Heating
47 °FDB
(Outdoor temp.)
Rated 2.88 3.67 4.45
Min.—Max. 0.62—4.38 0.67—4.57 0.67—4.77
17 °FDB
(Outdoor temp.)
Rated 3.29 3.66 4.44
Max. 5.01 4.56 4.76
Fan
HIGH
W
COOL: 158
HEAT: 122 229 248
MED 94 132 146
LOW 59 80 87
QUIET 40 62 66
Current Cooling Rated A 15.8 16.0 20.9
Heating 12.6 16.1 19.5
EER Cooling kW/kW 2.93 3.37 2.96
Btu/hW 10.0 11.5 10.1
COP Heating kW/kW 3.66 3.75 3.49
Btu/hW 12.5 12.8 11.9
SEER Cooling Btu/hW 16.7 17.8 16.6
HSPF Heating 11.3 10.5 10.3
Power factor Cooling kW/kW 99.1 99.2 98.8
Heating 99.4 99.1 99.2
Moisture removal pints/h (L/h) 5.3 (2.5) 5.5 (2.6) 8.2 (3.9)
Maximum operating current *1Cooling A17.6 19.7 22.2
Heating 19.1 19.7 20.7
Fan
Airflow rate
Cooling
HIGH
CFM (m3/h)
1,207 (2,050) 1,501 (2,550) 1,501 (2,550)
MED 965 (1,640) 1,201 (2,040) 1,201 (2,040)
LOW 783 (1,330) 971 (1,650) 971 (1,650)
QUIET 630 (1,070) 842 (1,430) 842 (1,430)
Heating
HIGH 1,089 (1,850) 1,501 (2,550) 1,501 (2,550)
MED 965 (1,640) 1,201 (2,040) 1,201 (2,040)
LOW 783 (1,330) 971 (1,650) 971 (1,650)
QUIET 630 (1,070) 842 (1,430) 842 (1,430)
Type × Q'ty Sirocco fan × 3
Motor output W 375
Static pressure range Pa 30 to 200 30 to 180
Sound pressure level *2
Cooling
HIGH
dB (A)
37 40 40
MED 33 35 35
LOW 30 33 33
QUIET 26 29 29
Heating
HIGH 35 40 40
MED 33 35 35
LOW 30 33 33
QUIET 26 29 29
Heat exchanger type
Dimensions (H × W × D) in (mm) 16-9/16 × 45-9/16 × 1-9/16 (420 × 1,158 × 39.9)
Fin pitch FPI 18
Rows × Stages 3 × 20
Pipe type Copper
Fin type Aluminum
Hydrophilic coating
Enclosure Material Steel
Color ―
Dimensions
(H × W × D)
Net in (mm) 11-13/16 × 55-1/8 × 27-9/16 (300 × 1,400 × 700)
Gross 15-3/4 × 64-1/2 × 34-7/16 (400 × 1,638 × 875)
Weight Net lb (kg) 121 (55)
Gross 141 (64)
Connection pipe Size Liquid in (mm) Ø 3/8 (Ø 9.52)
Gas Ø 5/8 (Ø 15.88)
Method Flare
Drain hose Material PVC
Size in (mm) Ø 13/16 (20.7) [I.D.], Ø 1-1/16 (26.6) [O.D.] (VP25)
Operation range Cooling °F (°C) 64.4 to 89.6 (18 to 32)
%RH 80 or less
Heating °F (°C) 60.8 to 86.0 (16 to 30)
- 6 - 1. Specifications
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

Type
Duct
Inverter heat pump
Model name ARU36RGLX ARU42RGLX ARU48RGLX
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80 °FDB/67 °FWB (26.67 °CDB/19.44 °CWB), and outdoor temperature of 95 °FDB/75 °FWB (35 °CDB/23.9 °CWB).
– Heating: Indoor temperature of 70 °FDB/59 °FWB (21.11 °CDB/15 °CWB), and outdoor temperature of 47 °FDB/43 °FWB (8.33 °CDB/6.11 °CWB).
– Pipe length: 24 ft 7 in (7.5 m), Height difference: 0 ft (0 m). (Between outdoor unit and indoor unit.)
– Standard static pressure: 0.23 in.WG (57 Pa): 36 and 42 model, 0.28 in.WG (70 Pa): 48 model
• Protective function might work when using it outside the operation range.
• *1: Maximum current:
– The maximum value when operated within the operation range.
– The total current of indoor unit and outdoor unit.
• *2: Sound pressure level:
– Measured values in manufacturer’s anechoic chamber.
– Because of the surrounding sound environment, the sound levels measured in actual installation conditions might be higher than the specified values here.
- 7 - 1. Specifications
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

2. Dimensions
2-1. Model: ARU12RGLX
Unit: in (mm)
Air
Gas pipe Drain
port
Control
box
Liquid pipe
Side view (L) Side view (R)Top view
Front view
Rear view
29-1/8 (740)
25-9/16 (650)
P3-15/16 × 5 = 19-11/16
(P100 × 5 = 500)
1 (25)
1 (25)
1-7/8
(47)
24-13/16 (631)
2-3/8 (60)
27-9/16 (700)
1-15/16
(49) 1-15/16
(49)
27-9/16 (700)
7-1/4
(184)
18-3/16 (462)
P3-15/16 × 4
= 15-3/4
(P100 × 4 = 400) 1-1/4
(31)
1 (25)
12-5/8 (320)
11 (280)
5-1/16
(128)
2-11/16
(68)
11-13/16 (300)
1-1/8 (29)
8-1/4
(210)
5-11/16
(145)
11-13/16
(300)
2-15/16
(75) 5-7/8
(150)
7-1/2
(190) Ø4-15/16
(Ø125)
5-1/2
(140)
Ø3/16
(Ø4)
Ø3/16
(Ø4.5)
6-5/16
(160)
3-1/8
(80)
5-1/2
(139)
3-15/16 (100)
2-5/16
(59)
Ø3/16
(Ø4.5)
8-9/16
(217)
2-1/4
(57)
2-5/8 (66)
3-3/8
(86)
1-5/8
(41)
8-11/16
(220)
7/8 (22)
10-1/16
(255)
- 8 -
2-1. Model: ARU12RGLX 2. Dimensions
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

2-2. Models: ARU18RGLX, ARU24RGLX, and ARU30RGLX
Unit: in (mm)
Air
Gas pipe
Drain
port
Control
box
Liquid pipe
Side view (L) Side view (R) Top view
Front view
Rear view
Ø3/16
(Ø4.5) 3-15/16
(100)
2-5/16
(59)
5-1/2
(139)
6-5/16
(160)
3-1/8
(80)
7-1/2
(190) Ø4-15/16
(Ø125)
5-1/2
(140)
Ø3/16
(Ø4)
40-15/16 (1,040)
35-1/4 (895)
2-1/16
(53)
P3-15/16 × 8 = 31-1/2
(P100 × 8 = 800)
1-7/8
(47)
1 (25)1 (25) 27-9/16 (700)
24-13/16 (631)
2-3/8 (60)
1-15/16
(49) 1-15/16
(49)
39-3/8 (1,000)
30 (762)
7-1/4
(184)
P3-15/16 × 7 = 27-9/16
(P100 × 7 = 700)
1-1/4
(31)
1-1/8
(29)
8-1/4
(210)
5-11/16
(145)
11-13/16
(300)
12-5/8
(320)
11 (280)
11-13/16
(300)
2-15/16
(75)
5-7/8
(150)
Ø3/16
(Ø4.5)
8-9/16
(217)
2-1/4
(57)
2-5/8 (66)
3-7/8 (98)
1-5/8
(41)
8-11/16
(220)
7/8 (22)
10-1/16
(255)
- 9 -
2-2. Models: ARU18RGLX, ARU24RGLX, and ARU30RGLX 2. Dimensions
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

2-3. Models: ARU36RGLX, ARU42RGLX, and ARU48RGLX
Unit: in (mm)
Gas
pipe
Drain
port
Control
box
Liquid
pipe
Air
Side view (L) Top view Side view (R)
Front view
3-9/16
(91)
1-11/16
(43)
5-7/8
(150)
8-9/16
(217)
9-11/16
(246)
Rear view
56-11/16 (1,440)
51 (1,295) 2-1/16
(53)
P3-15/16 × 12 = 47-1/4
(P100 × 12 = 1,200)
1-7/8
(47)
1 (25)
1 (25) 27-9/16 (700)
24-13/16 (631)
2-3/8 (60)
45-3/4 (1,162)
55-1/8 (1,400)
7-1/4
(184)
1-1/4
(31)
P3-15/16 × 11 = 43-5/16
(P100 × 11 = 1,100)
11-13/16
(300)
2-15/16
(75) 5-7/8 (150)
12-5/8 (320)
11 (280)
11-13/16
(300)
1-1/8
(29)
8-1/4
(210)
5-11/16
(145)
Ø4-15/16
(Ø125)
5-1/2
(140)
Ø3/16
(Ø4)
7-1/2
(190)
Ø3/16
(Ø4.5)
2-5/16
(59)
6-5/16
(160)
3-1/8
(80)
5-1/2
(139)
Ø3/16
(Ø4.5)
2-1/4
(57)
2-5/8 (66)
3-7/8 (98)
1-5/8
(41)
8-11/16
(220)
7/8 (22)
10-1/16
(255)
5-7/8
(150)
2-15/16 (75)
10-15/16
(278) 3/8 (10)
3-15/16
(100)
- 10 -
2-3. Models: ARU36RGLX, ARU42RGLX, and ARU48RGLX 2. Dimensions
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

2-4. Installation space requirement
Provide sufficient installation space for product safety.
¢Models: ARU12RGLX, ARU18RGLX, ARU24RGLX, ARU30RGLX,
ARU36RGLX, ARU42RGLX, and ARU48RGLX
Unit: in (mm)
Floor
12 (300)
or more
6 (150)
or more
99 (2,500) or more (When no ceiling)
1 (20) or more
1 (20) or more
- 11 -
2-4. Installation space requirement 2. Dimensions
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

2-5. Maintenance space requirement
For future maintenance and service access, provide sufficient maintenance space.
NOTE: Do not place any wiring or illumination in the maintenance space, as they will impede ser-
vice.
¢Models: ARU12RGLX, ARU18RGLX, ARU24RGLX, ARU30RGLX,
ARU36RGLX, ARU42RGLX, and ARU48RGLX
Unit: in (mm)
• Provide a service access for maintenance purposes.
Bottom view
AIR
Control box
12 (300)
or more
20 (500) or more
20 (500) or more
Service access
• The service access necessary for fan units and filter maintenance.
AIR
Service access
Fan unit side
12 (300)
or more
20 (500) or more
4 (100) or more
4 (100)
Bottom view
- 12 -
2-5. Maintenance space requirement 2. Dimensions
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

3. Wiring diagrams
3-1. Models: ARU12RGLX, ARU18RGLX, and ARU24RGLX
- 13 -
3-1. Models: ARU12RGLX, ARU18RGLX, and ARU24RGLX 3. Wiring diagrams
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

3-2. Models: ARU30RGLX, ARU36RGLX, ARU42RGLX, and
ARU48RGLX
- 14 -
3-2. Models: ARU30RGLX, ARU36RGLX, ARU42RGLX, and ARU48RGLX 3. Wiring diagrams
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX