Panasonic CU-4KS24NBU Installation Instructions Manual
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Panasonic CU-4KS24NBU Installation Instructions Manual

Panasonic CU-4KS24NBU Installation Instructions Manual

Split system air conditioner
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APPENDIX A
INSTALLATION INSTRUCTIONS
CU-3KS19NBU
CU-4KS24NBU
CU-4KS31NBU
(852-6-4190-581-00-1)
A-1

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Summary of Contents for Panasonic CU-4KS24NBU

  • Page 1 APPENDIX A INSTALLATION INSTRUCTIONS CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU (852-6-4190-581-00-1)

  • Page 2: Table Of Contents

    Indoor Unit Outdoor Unit 2-1. Indoor Unit CS-MKS7NKU CU-3KS19NBU 2-2. Connecting Indoor Units CS-MKS9NKU CU-4KS24NBU 2-3. Outdoor Unit CS-MKS12NKU CU-4KS31NBU 2-4. Baffle Plate for the Outdoor Unit 2-5. Outer Dimensions of Outdoor Unit CS-MKS18NKU 2-6. Diagram of Outdoor Unit Installation...

  • Page 3: Important

    IMPORTANT! When Transporting Please Read Before Starting Be careful when picking up and moving the indoor and out- door units. Get a partner to help, and bend your knees when This air conditioning system meets strict safety and operating lifting to reduce strain on your back. Sharp edges or thin alu- standards.
  • Page 4 Others the flare and union tubes before connecting them, then CAUTION tighten the nut with a torque wrench for a leak-free connection. the refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously or re-installation, and while repairing refrigeration parts. toxic gas.

  • Page 5: General

    1-2. Accessories Supplied with Unit Table 1 Parts Figure Q’ty Parts Figure Q’ty Parts Figure Q’ty CU-4KS24NBU Reducer Labels for inter-unit 4 each Cushion rubber A B C D (1/2" 3/8") cable and tube CU-4KS31NBU Packed in the outdoor unit.

  • Page 6: Installation Site Selection

    2. Installation Site Selection Indoor unit 2-1. Indoor Unit To prevent abnormal heat generation WARNING and the possibility of fire, do not place obstacles, enclosures and grilles in front of or surrounding the air conditioner in a way that may block air flow.
  • Page 7 (ft.) (L1+L2+L3+L4) (ft.) (ft.) CU-3KS19NBU 150 (L1+L2+L3) 150 (L1+L2+L3) — CU-4KS24NBU 150 (L1+L2+L3+L4) 200 (L1+L2+L3+L4) 0.22 CU-4KS31NBU 150 (L1+L2+L3+L4) 230 (L1+L2+L3+L4) 0.22 * If total tubing length becomes 150 to 200 ft. (Max.) or 150 to 230 ft. (Max.), charge additional refrigerant (R410A) by 0.22 oz./ft.

  • Page 8: Connecting Indoor Units

    3/8"(9.52mm) 1/4"(6.35mm) Flare 3/8"(9.52mm) Union 1/2"(12.70mm) A joint for connecting tubes of different sizes (3/8"(9.52mm) 1/2"(12.70mm)) Supplied Reducer Fig. 4b (2) Connecting indoor unit for CU-4KS24NBU (1/2"(12.70mm) 3/8"(9.52mm)) Supplied Reducer Flare 1/2"(12.70mm) Union 3/8"(9.52mm) Outdoor unit Indoor unit 3/8"(9.52mm) (CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U) 1/2"(12.70mm)
  • Page 9 Outdoor unit Indoor unit 1/2"(12.70mm) (CS-MKS18NKU) (CS-KS18NB4UW) 1/2"(12.70mm) 1/4"(6.35mm) 3/8"(9.52mm) (CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U) 3/8"(9.52mm) 1/4"(6.35mm) Fig. 4d (1/2"(12.70mm) 5/8"(15.88mm)) Locally purchased Flare 1/2"(12.70mm) Union 5/8"(15.88mm) Outdoor unit Indoor unit 5/8"(15.88mm) (CS-MKS24NKU) 1/2"(12.70mm) 1/4"(6.35mm) 3/8"(9.52mm)
  • Page 10 (3) Connecting indoor unit for CU-4KS31NBU (1/2"(12.70mm) 3/8"(9.52mm)) Supplied Reducer Flare 1/2"(12.70mm) Union 3/8"(9.52mm) Outdoor unit Indoor unit 3/8"(9.52mm) (CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U) 1/2"(12.70mm) 1/4"(6.35mm) 3/8"(9.52mm) (CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U) 1/2"(12.70mm) 1/4"(6.35mm) 3/8"(9.52mm) (CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U) 3/8"(9.52mm) 1/4"(6.35mm) Fig. 4g (1/2"(12.70mm 3/8"(9.52mm)) Supplied Reducer Flare 1/2"(12.70mm)
  • Page 11 (1/2"(12.70mm) 5/8"(15.88mm))Locally purchased Flare 1/2"(12.70mm) Union 5/8"(15.88mm) Outdoor unit Indoor unit 5/8"(15.88mm) (CS-MKS24NKU) 1/2"(12.70mm) 1/4"(6.35mm) 3/8"(9.52mm) (CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U) 1/2"(12.70mm) 1/4"(6.35mm) 3/8"(9.52mm) (CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U) 3/8"(9.52mm) 1/4"(6.35mm) Flare 1/2"(12.70mm) Union 3/8"(9.52mm) (1/2"(12.70mm) 3/8"(9.52mm))Supplied Reducer Fig. 4j (1/2"(12.70mm) 5/8"(15.88mm)) Locally purchased Flare 1/2"(12.70mm) Union 5/8"(15.88mm)

  • Page 12: Outdoor Unit

    2-3. Outdoor Unit Exhaust fan AVOID: Hot air heat sources, exhaust fans, etc. (Fig. 5a) Heat source damp, humid or uneven locations. Outdoor unit Obstacle above choose a place as cool as possible. Min. choose a place that is well ventilated. Min.
  • Page 13 Model (inch) 25-3/16 25/32 1-31/32 10-5/8 10-5/8 25/64 25/32 19/32 25-7/8 19/64 25/64 5-29/32 25/32 25/32 CU-3KS19NBU, CU-4KS24NBU (mm) (inch) 25-3/16 25/32 1-3/8 30-29/32 13-25/32 13-25/32 25/64 25/32 19/32 31-25/32 19/64 25/64 5-29/32 25/32 25/32 CU-4KS31NBU (mm) For Air Discharge...
  • Page 14 (3) Installation procedure 1. Air Intake Baffle 2. Air Discharge Baffle 1. Remove the panels front, top, side L and R from the (1) Left side unit and drill 4 holes of ø1/4 inch (6.5 mm) at the 1. Remove the top panel from the unit. prescribed positions.

  • Page 15: Outer Dimensions Of Outdoor Unit

    (Outer diameter 1/4"( 6.35 )) Service valve on wide tube side (Outer diameter 3/8"( 9.52 )) 2-1/32 4-1/2 1-13/16 2-1/16 Fig. 6a (2) CU-4KS24NBU 23-15/16 5-11/32 15/32 35-7/16 (900) 2-29/32 Service valve on wide tube side (Outer diameter 1/2"(12.70)) Service valve on narrow tube side (Outer diameter 1/4"(6.35))

  • Page 16: Diagram Of Outdoor Unit Installation

    Diagram of Outdoor Unit Installation 2-6. Never install only a single indoor unit. Ceiling-mounted Wall-mounted types cassette types Indoor unit D Indoor unit D Be sure to connect indoor and outdoor units only in combinations that are listed in the catalog or in the combination table that was provided with the outdoor unit.

  • Page 17: Installation Process

    3. Installation Process Embedding the Tubing and Wiring 3-1. Do not connect tubes to locations that are embedded. Be sure to bind refrigerant tubing and inter-unit cables together with vinyl tape. The power cable must be obtained on-site. (#12: Less than 85 ft.) # ...

  • Page 18: Caution Before Connecting Tubes Tightly

    NOTE Copper tubing When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube. (Fig. 9) (3) Remove the flare nut from the unit and be sure to mount Reamer it on the copper tube. (4) Make a flare at the end of copper tube with a flare tool.* (Figs.

  • Page 19: Insulation Of Refrigerant Tubing

    Torque wrench Be sure to match refrigerant CAUTION tubing and electric wiring between indoor and outdoor Spanner Indoor unit units. Outdoor unit Fig. 15 3-6. Insulation of Refrigerant Tubing Insulation IMPORTANT Thickness: min. 5/16" Min. To prevent heat loss and wet floors due to dripping of con- (8 mm) 5/16"...

  • Page 20: Taping The Tubes

    3-7. Taping the Tubes After a tube has been insulated, CAUTION never try to bend it into a narrow curve, as this may cause the tube Clamp to break or crack. nsulated tubes (1) At this time, the 2 refrigerant tubes (and electrical wire if local codes permit) should be taped together with armoring tape.
  • Page 21 Stopper Cap tightening torque: 170 – 215 lbs·in Spindle Perform the air purge for tubes A, B, C, and D. Use the same (200 – 250 kgf·cm) Service port procedures for all tubes. (Tighten by hand, then Screw diameter: 1/2 use a wrench to turn (1) Check that each tube (both narrow and wide tubes) UNF 20 threads...

  • Page 22: Pump Down

    (11) Replace the flare nut on the wide tube service port and fasten the flare nut securely with an adjustable wrench or box wrench. Next, mount the valve cap and tighten it with a torque wrench (the cap needs to be tightened with the torque of 180 lbs·in (200 kgf·cm)).

  • Page 23: Wiring Instructions

    Max. Control Line Length (ft.) Fuse (B) (C) Model Circuit Capacity (#12) (#14) CU-3KS19NBU 85 (Max.) 82 (Max.) 15 A CU-4KS24NBU 85 (Max.) 82 (Max.) 20 A CU-4KS31NBU 85 (Max.) 100 (Max.) 20 A # ... AWG (American Wire Gauge)

  • Page 24: Wiring System Diagram

    Always comply with national and local code requirements. indoor and outdoor units. Electrical noise may affect the operation. 5-3. Wiring System Diagram 3 indoor units with CU-3KS19NBU 4 indoor units with CU-4KS24NBU, CU-4KS31NBU Disconnect Disconnect switch switch Field supply Field supply...

  • Page 25: How To Connect Wiring To The Terminal

    5-4. How to Connect Wiring to the Terminal Loose wiring may cause the WARNING terminal to overheat or result in unit malfunction. A fire hazard may also exist. There- fore, be sure all wiring is tightly connected. When connecting each power wire to the corresponding terminal, follow the instructions “How to connect wiring 9/32"...

  • Page 26: Wiring Instructions For The Outdoor Unit

    5-5. Wiring Instructions for the Outdoor Unit CAUTION Be sure to correctly align inter-unit cables A, B, C and D. Outdoor unit Terminal board Power supply 1 2 3 4 5 6 7 8 9 10 11 12 (conduit) Power: Single-phase, 230/208VAC 60HZ Power breaker...

  • Page 27: Test Run

    Regulations on wire size differ from locality to locality. For Lock nut Cabinet field wiring requirements, please refer to your local electri- cal codes. Make sure that the installation fully complies with all local and national regulations. (1) Remove access panel “C”. (Fig. 32) (2) Connect the inter-unit and power supply line accord- ing to the drawing on the panel side.

  • Page 28: Connecting A Home Automation Device

    7. Connecting a Home Automation Device The HA (white) 4P terminal is located on the indoor unit PCB. If a HA device will be used, connect it to this terminal. 8. Installation Check Sheet The strength of the installation location is sufficient to support the air conditioner weight. The indoor and outdoor units are installed level and vertically.
  • Page 29 DC1111-0...

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