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Cooling Fans MU Series 119 mm 38 mm Thick ( 4.69 in. 1. in. Thick) Ambient Temperature: 1 + C (+14 +14 F) Operating Voltage Range: ±1% Materials Frame: Die Cast Aluminum Blades: Polycarbonate (Flammability grade V-) Overheat Protection: Impedance Protected Bearings: Ball Bearings Specifications Type Standard Middle Low Model MU1238A-21B Single-Phase 115 MU1238A-51B Voltage Frequency Current Input Max. Air Flow Max. Noise Level VAC Hz A W r/min m 3 /min CFM Pa inh2o db (A) Single-Phase 22 Single-Phase 23 Single-Phase 23 MU1238B-21B Single-Phase 115 MU1238B-51B Single-Phase 22 Single-Phase 23 Single-Phase 23 MU1238L-21B Single-Phase 115 MU1238L-51B Single-Phase 22 Single-Phase 23 Single-Phase 23.2.18.1.11.1.16.15.9.9.9.1.9.6.6.6 14. 13. 13.5 16. 13.5 12.5 11.5 11.5 14. 11.5 8. 7.5 7.5 7.5 28 28 28 2 28 2 2 28 21 21 21 21 22 How to read specifications Page E-19 Details of safety standards Page G-2 Details of RoHS Directive Page G-38 The following items are included in each product. Fan, Operating Manual 2.7 3. 2.7 2.7 3. 2.2 2.5 2.2 2.3 2.5 1.8 1.85 95.3 16 95.3 95.3 16 77.7 88.3 77.7.2 88.3 63.5 65.3 52 52 52 59 52 27 29.5.5.5.5.5.29.29.29.237.29.137.11.137.137.118 43 46 43 43 46 38 4 38 39 4 Air Flow Characteristics How to read air flow static pressure characteristics Page E-2 MU1238A.4 1 MU1238B.4 1 MU1238L.4 1 [inh2o]..3.25.2.15.1.5 [Pa] 9 8 7 4 3 2 1 Hz Hz Hz Hz 3.5 1. 1.5 2. 2.5 3. 3.5 2 4 8 1 12 4 4 3 2 2 1 1 [inh2o]..3.25.2.15.1.5 [Pa] 9 8 7 4 3 2 1 Hz Hz Hz Hz.5 1. 1.5 2. 2.5 3. 3.5 2 4 8 1 12 4 4 3 3 2 2 1 1 [inh2o]..3.25.2.15.1.5 [Pa] 9 8 7 4 3 2 1 Hz Hz Hz Hz.5 1. 1.5 2. 2.5 3. 3.5 2 4 8 1 12 4 4 3 3 2 2 1 1 Dimensions Unit = mm (in.) Mass:.53 kg (1.2 lb.) 119 (4.69) 14.8±.3 (4.126±.12) E1 119 (4.69) 14.8±.3 (4.126±.12) Rotation Direction 8 ϕ4.3 (ϕ.169) 6 (.24) Protective Earth Terminal M4 Air Flow 38 (1.) 6 (.24) Panel Cut-Out Unit = mm (in.) 14.8 (4.126) 14.8 (4.126) Outlet Side ϕ1 (ϕ5.) 4 ϕ4.5 (ϕ.177) 14.8 (4.126) 14.8 (4.126) Intake Side 4 ϕ4.5 (ϕ.177) E-7 ORIENTAL MOTOR GENERAL CATALOG 29/21 Features E-46 / System Configuration E-48 / General Specifications E-

Connection Diagram Line Accessories AIR FLOW ROTATION The following products are RoHS-Compliant. Details Page E-137 PE Product Model Safety Standards Page Finger Guard FG12D Conformed component E-145 Filter FL12 E-147 Screen FS12S E-1 PCA2B [1 m (3.3 ft.)] Thermostats Electrical Appliance and Material Safety Law-Compliant component (Japan) UL recognized component CSA certified component A thermostat makes it possible for fans to operate only when cooling is necessary, thereby conserving energy. Fan Kit Finger Guard Thermostats AM1-WA1/AM1-XA1 Page E-1 Fan Mounting Screws The lineup includes a product configuration containing all necessary accessories in one package. Details Page E-14 E-151 Product Line Fan Kit Model T-MU1238A-21-GP T-MU1238A-51-GP T-MU1238B-21-GP T-MU1238B-51-GP T-MU1238L-21-GP T-MU1238L-51-GP Cooling Module Axial Flow Fans Centrifugal Blowers Cross Flow Fans Cooling Fans Introduction FM Variable Flow MU Long-Life MDE MDS/MD MB MBD MF MFD Thermostats Accessories Installation E-71

Cooling Fans MU Series 119 mm 25 mm Thick ( 4.69 in..98 in. Thick) Ambient Temperature: 1 + C (+14 +14 F) Operating Voltage Range: ±1% Materials Frame: Die Cast Aluminum Blades: Polycarbonate (Flammability grade V-) Overheat Protection: Impedance Protected Bearings: Ball Bearings Specifications Type Standard Middle Model MU1225S-21 Single-Phase 115 MU1225S-51 Voltage Frequency Current Input Max. Air Flow Max. Noise Level VAC Hz A W r/min m 3 /min CFM Pa inh2o db (A) Single-Phase 22 Single-Phase 23 Single-Phase 23 MU1225M-21 Single-Phase 115 MU1225M-51 Single-Phase 22 Single-Phase 23 Single-Phase 23.14.12.7.8.7.13.11.7.7.7 11. 1.5 12. 1. 1.5 9. 1. 12. 2 29 2 2 29 22 2 22 22 2 How to read specifications Page E-19 Details of safety standards Page G-2 Details of RoHS Directive Page G-38 The following items are included in each product. Fan, Operating Manual 1.6 1.6 1.6 1.4 1.7 1.4 1.4 1.7 56.5 56.5 56.5.4.4.4 31 31.196.176.196.196.176.129.125.129.129.125 4 4 37 37 Air Flow Characteristics How to read air flow static pressure characteristics Page E-2 MU1225S.4 1 4 MU1225M.4 1 4 [inh2o]..3.25.2.15.1.5 [Pa] 9 8 7 4 3 2 1 Hz Hz Hz Hz 4.4.8 1.2 1.6 2. 2.4 2.8 2 4 8 3 28 24 2 1 12 8 [inh2o]..3.25.2.15.1.5 [Pa] 9 8 7 4 3 2 1 Hz Hz Hz 3 28 24 2 1 12 8 4 Hz.4.8 1.2 1.6 2. 2.4 2.8 2 4 8 Dimensions Unit = mm (in.) Mass:.31 kg (.68 lb.) 119 (4.69) 14.8±.3 (4.126±.12) E12 119 (4.69) 25 3 (.12) (.98) 14.8±.3 (4.126±.12) 3 (.12) Rotation Direction Air Flow Protective Earth Terminal M4 8 ϕ4.3 (ϕ.169) Panel Cut-Out Unit = mm (in.) 14.8 (4.126) 14.8 (4.126) Outlet Side ϕ1 (ϕ5.) 4 ϕ4.5 (ϕ.177) 14.8 (4.126) 14.8 (4.126) Intake Side 4 ϕ4.5 (ϕ.177) E-72 ORIENTAL MOTOR GENERAL CATALOG 29/21 Features E-46 / System Configuration E-48 / General Specifications E-

Connection Diagram PE Accessories AIR FLOW ROTATION The following products are RoHS-Compliant. Details Page E-137 Line Product Model Safety Standards Page Finger Guard FG12D Conformed component E-145 Filter FL12 E-147 Screen FS12S E-1 PCA2B [1 m (3.3 ft.)] Thermostats Electrical Appliance and Material Safety Law-Compliant component (Japan) UL recognized component CSA certified component A thermostat makes it possible for fans to operate only when cooling is necessary, thereby conserving energy. Fan Kit Finger Guard Thermostats AM1-WA1/AM1-XA1 Page E-1 Fan Mounting Screws The lineup includes a product configuration containing all necessary accessories in one package. Details Page E-14 E-151 Product Line Fan Kit Model T-MU1225S-21-GP T-MU1225S-51-GP T-MU1225M-21-GP T-MU1225M-51-GP Cooling Module Axial Flow Fans Centrifugal Blowers Cross Flow Fans Cooling Fans Introduction FM Variable Flow MU Long-Life MDE MDS/MD MB MBD MF MFD Thermostats Accessories Installation E-73

Cooling Fans MU Series 92 mm 25 mm Thick ( 3.62 in..98 in. Thick) Ambient Temperature: 1 + C (+14 +14 F) Operating Voltage Range: ±1% Materials Frame: Die Cast Aluminum Blades: Polycarbonate (Flammability grade V-) Overheat Protection: Impedance Protected Bearings: Ball Bearings Specifications Type Standard Middle Model MU925S-21 Single-Phase 115 MU925S-51 Voltage Frequency Current Input Max. Air Flow Max. Noise Level VAC Hz A W r/min m 3 /min CFM Pa inh2o db (A) Single-Phase 22 Single-Phase 23 Single-Phase 23 MU925M-21 Single-Phase 115 MU925M-51 Single-Phase 22 Single-Phase 23 Single-Phase 23.11.1.6.7.6.11.1.6.6.6 8. 8.5 1.5 8. 9. 8. 8.5 8. 2 3 2 2 3 23 27 23 23 27 How to read specifications Page E-19 Details of safety standards Page G-2 Details of RoHS Directive Page G-38 The following items are included in each product. Fan, Operating Manual.95 1.1.95.95 1.1.85 1..85.85 1..5 38.8.5.5 38.8 3..8 3. 3..8 59 59.176.237.176.176.237.137.176.137.137.176 39 39 31 31 Air Flow Characteristics How to read air flow static pressure characteristics Page E-2 MU925S.4 1 MU925M.4 1 [inh2o]..3.25.2.15.1.5 [Pa] 9 8 7 4 3 2 1 Hz Hz Hz Hz.2.4.6.8 1. 1.2 1.4 1 2 3 4 4 4 3 3 2 2 1 1 [inh2o]..3.25.2.15.1.5 [Pa] 9 8 7 4 3 2 1 Hz Hz Hz Hz.2.4.6.8 1. 1.2 1.4 1 2 3 4 4 4 3 3 2 2 1 1 Dimensions Unit = mm (in.) Mass:.27 kg (.59 lb.) E14 92 (3.62) 82.5±.3 (3.248±.12) 92 (3.62) 82.5±.3 (3.248±.12) Rotation Direction 8 ϕ3.7 (ϕ.146) Air Flow 4 (.16) 25 (.98) Protective Earth Terminal M4 (-51 type only) 4 (.16) Panel Cut-Out Unit = mm (in.) 9 (3.54) 82.5 (3.248) 9 (3.54) 82.5 (3.248) Outlet Side ϕ16 (ϕ4.17) 4 ϕ4.5 (ϕ.177) 82.5 (3.248) 82.5 (3.248) 9 Intake Side (3.54) 4 ϕ4.5 (ϕ.177) E-74 ORIENTAL MOTOR GENERAL CATALOG 29/21 Features E-46 / System Configuration E-48 / General Specifications E-

Connection Diagram PE Accessories AIR FLOW ROTATION The following products are RoHS-Compliant. Details Page E-137 Line Product Model Safety Standards Page Finger Guard FG9D Conformed component E-145 Filter FL9 E-147 Screen FS9S E-1 PCA2B [1 m (3.3 ft.)] Thermostats Electrical Appliance and Material Safety Law-Compliant component (Japan) UL recognized component CSA certified component A thermostat makes it possible for fans to operate only when cooling is necessary, thereby conserving energy. Fan Kit Finger Guard Thermostats AM1-WA1/AM1-XA1 Page E-1 Fan Mounting Screws The lineup includes a product configuration containing all necessary accessories in one package. Details Page E-14 E-151 Product Line Fan Kit Model T-MU925S-21-GP T-MU925S-51-GP T-MU925M-21-GP T-MU925M-51-GP Cooling Module Axial Flow Fans Centrifugal Blowers Cross Flow Fans Cooling Fans Introduction FM Variable Flow MU Long-Life MDE MDS/MD MB MBD MF MFD Thermostats Accessories Installation E-75

Cooling Fans MU Series 8 mm 25 mm Thick ( 3.15 in..98 in. Thick) Ambient Temperature: 1 + C (+14 +14 F) Operating Voltage Range: ±1% Materials Frame: Die Cast Aluminum Blades: Polycarbonate (Flammability grade V-) Overheat Protection: Impedance Protected Bearings: Ball Bearings Specifications Type Standard Model MU825S-23 Single-Phase 115 MU825S-53 Voltage Frequency Current Input Max. Air Flow Max. Noise Level VAC Hz A W r/min m 3 /min CFM Pa inh2o db (A) Single-Phase 22 Single-Phase 23 Single-Phase 23.11.9.6.7.6 8. 8.5 1.5 8. 27 27 27 How to read specifications Page E-19 Details of safety standards Page G-2 Details of RoHS Directive Page G-38 The following items are included in each product. Fan, Operating Manual.45.55.45.45.55 15.9 19.4 15.9 15.9 19.4.137.196.137.137.196 28 28 28 Air Flow Characteristics How to read air flow static pressure characteristics Page E-2.4 1 [inh2o]..3.25.2.15.1.5 [Pa] 9 8 7 4 3 2 1 Hz Hz Hz Hz.1.2.3.4.5.6 5 1 15 2 4 4 3 3 2 2 1 1.7 Dimensions Unit = mm (in.) Mass:.25 kg (.55 lb.) 8 (3.15) 71.5±.3 (2.5±.12) E15 8 (3.15) 71.5±.3 (2.5±.12) Rotation Direction 25 (.98) 4 (.16) 4 (.16) Air Flow Protective Earth Terminal M4 (-53 type only) Panel Cut-Out Unit = mm (in.) 78 (3.7) 71.5 (2.5) 78 (3.7) 71.5 (2.5) ϕ9 Outlet Side (ϕ3.54) 4 ϕ4.5 (ϕ.177) 71.5 (2.5) 71.5 (2.5) Intake Side 78 (3.7) 4 ϕ4.5 (ϕ.177) 8 ϕ4.3 (ϕ.169) 3 (12) 1 (.39) Power Supply Leads UL Style 66, AWG22 E-76 ORIENTAL MOTOR GENERAL CATALOG 29/21 Features E-46 / System Configuration E-48 / General Specifications E-

Connection Diagram PE Accessories The following products are RoHS-Compliant. Details Page E-137 Line Product Model Safety Standards Page Finger Guard FG8D Conformed component E-145 Filter FL8 E-147 Screen FS8S E-1 Thermostats A thermostat makes it possible for fans to operate only when cooling is necessary, thereby conserving energy. Fan Kit Finger Guard Thermostats AM1-WA1/AM1-XA1 Page E-1 The lineup includes a product configuration containing all necessary accessories in one package. Details Page E-14 Fan Mounting Screws Product Line Fan Kit Model T-MU825S-23-G T-MU825S-53-G Cooling Module Axial Flow Fans Centrifugal Blowers Cross Flow Fans Cooling Fans Introduction FM Variable Flow MU Long-Life MDE MDS/MD MB MBD MF MFD Thermostats Accessories Installation E-77