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Air-Conditioner Control System
Power supply unit
Model: PAC-SC51KUA
Before using the controller, please read this Installation Manual carefully to ensure proper
operation. Retain this manual for future reference.
Installation Manual
Contents
1. Safety Precautions ...................................................1
2. Product features.......................................................2
1. Specifications .................................................2
2. Power supply capacity....................................2
3. External Dimensions ......................................3
3. Installation ................................................................4
1. Parts List ........................................................4
2. Field-supplied Parts........................................4
3. Installation area and direction ........................4
4. Unit installation ...............................................5
4. Wiring .......................................................................5
1. Cover Removal and Installation .....................5
2. Power line.......................................................6
Line.................................................................6
5. M-NET Transmission Lines Length........................10

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   Summary of Contents for Mitsubishi Electric PAC-SC51KUA

  • Page 1: Table Of Contents

    Air-Conditioner Control System Power supply unit Model: PAC-SC51KUA Installation Manual Contents 1. Safety Precautions ...........1 2. Product features............2 1. Specifications ..........2 2. Power supply capacity........2 3. External Dimensions ........3 3. Installation ..............4 1. Parts List ............4 2. Field-supplied Parts........4 3. Installation area and direction ......4 4.

  • Page 2: Safety Precautions

    This manual details how to install the PAC-SC51KUA power supply unit and its wiring with the centralized controller and the indoor units. For the information about how to install the centralized controller or the indoor units, see the appropriate installation manual.

  • Page 3: Product Features

    Not connectable to multiple AG-150A units. Cannot be used with G-50A. 2-2. M-NET power supply (TB2) PAC-SC51KUA is capable to supply equivalent power up to 5 (coefficient), therefore the maximum connectable number of system controller is as follows. Table 1 Equivalent power consumption of controllers...

  • Page 4: External Dimensions

    3. External Dimensions 271 ( 10- 11 72 ( 2- 7 16 ) 90 ( 3- 9 16 ) TB2,TB3 Unit: mm (in.) - 3 -...

  • Page 5: Installation

    Attach the mounting brackets to PAC-SC51KUA as shown in Fig. 3-1. PAC-SC51KUA Power supply unit is not waterproof. PAC-SC51KUA shall be installed in a metal control panel box (steel: thickness 1mm ( in.) or more). Follow the installation requirements as shown in Fig. 3-1.

  • Page 6: Unit Installation

    4. Unit installation Attach the unit to the metal control panel box using M4 screws as shown in Fig. 3-2. M4 (accessories) M4 (field-supplied) Refer to the AG-150A Installation Manual for instructions on how to install the unit inside the mounting attachment A type (PAC-YG85KTB) (sold separately).

  • Page 7: Power Line

    The DC power cable and M-NET transmission line connect as shown in Fig. 4-3. The DC power cable has a 24VDC and a GND polarity. Connect it to the terminals in accordance with the polarity. Connect the M-NET transmission line to the A, B (non-polarity), and S (shield) terminal block. Power supply unit (PAC-SC51KUA) Centralized controller (AG-150A)

  • Page 8

    Fig. 4-4 CAUTION • Both of PAC-SC51KUA and Outdoor unit can supply DC power to the M-NET transmission line. Set the outdoor unit central control system transmission line power supply to the factory setting CN41 (no supply). For further details, refer to the outdoor unit installation manual. Failure to do so may cause unit malfunction or fire.

  • Page 9

    (2) With the use of an expansion controller (PAC-YG50ECA) Only connect the DC power cable. (Use only TB3 or CN2.) (a) Connected via the terminal block (TB3) Power supply unit (PAC-SC51KUA) Centralized controller (AG-150A) Cable Clamp PAC-YG50ECA OUTDOOR UNIT DC power supply line (24VDC) *Polarized...

  • Page 10

    (b) Connecting the connector (CN2) Power supply unit (PAC-SC51KUA) Centralized controller (AG-150A) DC power supply line (24VDC) *Polarized DC power supply line (24VDC) *Polarized Fig. 4-6 After connection for the each cable, fasten each cable with the cable fixture. 3-2. When not connecting to the centralized controller (AG-150A) Only use the M-NET output (TB2 or CN1).

  • Page 11: M-net Transmission Lines Length

    M-NET transmission line (Indoor control line) 1) Maximum length of M-NET transmission line: * To supply power to the M-NET line from PAC-SC51KUA, 1 L1+L2+L3+ 5+ 1+ 2 ( 3) 500m (1640 ft) connect the power jumper on outdoor unit to CN41.

  • Page 12

    Please be sure to put the contact address/telephone number on this manual before handing it to the customer. HEAD OFFICE: TOKYO BLDG. , 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Authorized representative in EU: MITSUBISHI ELECTRIC EUROPE B.V. HARMAN HOUSE, 1 GEORGE STREET, UXBRIDGE, MIDDLESEX UB8 1QQ, U.K. WT05372X04...

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