Panasonic CU-2S18NBU-1 service manual Installation Instruction, Outdoor Unit Installation Diagram

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10. Installation Instruction

10.1 SELECT THE BEST LOCATION

10.1.1OUTDOOR UNIT

If an awning is built over the unit to prevent direct sunlight or rain, be careful that heat radiation from the condenser is not obstructed.

There should not be any animal or plant which could be affected by hot air discharged.

Keep the spaces indicated by arrows from wall, ceiling, fence or other obstacles.

Do not place any obstacles which may cause a short circuit of the discharged air.

Recommended installation height for outdoor unit should be above the seasonal snow level.

Refrigerant piping size

Outdoor Unit

CU-2S18***

 

 

Liquid - side

ø1/4" thickness 1/32"

 

 

Gas - side

ø3/8" thickness 1/32"

 

 

Outdoor Unit

CU-2S18***

 

 

Min. total piping length for

65.6 ft

additional gas

 

If total piping length of all indoor units exceeds the minimum length listed above, additionally charge with 0.2 oz of refrigerant (R410A) for each additional feet of piping.

10.1.2Outdoor Unit Installation Diagram

This illustration is for explanation purposes only. * Note:

Respective indoor unit installation procedure shall refer to instruction manual provided in the indoor unit packaging.

Allowable piping length

 

Outdoor Unit

 

CU-2S18***

Allowable piping length of each indoor unit (min. ~ max.)

 

9.8 ft ~ 82.0 ft

Allowable total piping length of all indoor unit

 

164.0 ft or less

 

 

 

 

 

Height difference between indoor and outdoor unit

Outdoor unit located on upper side

 

49.2 ft or less

Outdoor unit located otherwise

 

24.6 ft or less

 

 

 

Height difference between indoor unit

 

Outdoor unit located on upper side

 

24.6 ft or less

 

 

 

 

 

Outdoor unit located otherwise

 

49.2 ft or less

 

 

 

 

 

 

 

 

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Contents Table of Contents Disassembly and Assembly Instructions Items to be followed are classified by the symbols Safety PrecautionsPage Model Outdoor Unit CU-2S18NBU-1 SpecificationMulti split combination possibility Dimensions Refrigeration Cycle Diagram Block Diagram Wiring Connection Diagram Electronic Circuit Diagram Main Printed Circuit Board Printed Circuit BoardNoise Filter Printed Circuit Board Check Points Installation InformationOutdoor Unit Installation Diagram Installation InstructionOutdoor Unit Installation Guidelines Gas Leak Checking Connecting the Piping to Outdoor UnitEvacuation of the Equipment Heat Insulation Outdoor fan control Powerful OperationOperation Control Cooling OperationFreeze Prevention control Cool Electronic Parts Temperature Rise Protection 1 CoolElectronic Parts Temperature Rise Protection 2 Cool Protection Control12.7 30 seconds Force Operation Time Delay Safety Control Restart ControlIPM power transistor Protection Control Cooling overload control CoolCompressor Protection Control Gas leak detection control Valve close detection controlCompressor discharge high pressure protection control Test Operation Servicing ModeWiring Error Check Pump Down OperationMode priority function Power Save ModeSelf Diagnosis Function Troubleshooting GuideIndoor high Check indoor heat Exchanger Remove the Control Board Cover and Particular Plates Disassembly and Assembly InstructionsOutdoor Unit Removal Procedure Removing the Cabinet Top Plate and Cabinet Front PlateRemoving the Propeller Fan and Fan Motor Removing the Control P.C. BoardPage Technical Data Operation CharacteristicsCS-S9NKUW-1 CU-2S18NBU-1 Page CS-S9NKUW-1x2 CU-2S18NBU-1 Page CS-S12NKUW-1 CU-2S18NBU-1 Page CS-S12NKUW-1x2 CU-2S18NBU-1 Page CS-S12NKUW-1+CS-S9NKUW-1 CU-2S18NBU-1 Page Exploded View and Replacement Parts List REF. no Description & Name QTY Shock Absorber Left