Panasonic CU-4KS31NBU service manual Precautions for installation

Page 99
Panel top

(3) Installation procedure

1. Air Intake Baffle

2. Air Discharge Baffle

(1) Left side

1.Remove the top panel from the unit.

2.Remove the panel side L, and drill 3 holes of ø1/4 inch (6.5 mm) at the prescribed position.

3.Install the windbaffle on the unit using field supply bolts and nuts.

4.Recommended bolts to be used are 15/64" (M6 ISO standard), and the recommended length of the bolts is between 19/32 – 25/32 inch (15 – 20 mm).

5.Use washers and spring washers to tightly fasten the windbaffle to the unit.

(2) Right side

1.Remove the top panel from the unit.

2.Use 2 preholes on the panel side R to install the baffle plate.

3.Remove the panel side R from the unit by removing the screws. These screws are used in step 4 below.

4.Put (sandwich) the windbaffle between the unit and the panel side R, then install the windbaffle on the unit using the above screws. Be careful not to damage the screw

holes.

Panel front

Panel side R

Panel side L

1.Remove the panels front, top, side L and R from the unit and drill 4 holes of ø1/4 inch (6.5 mm) at the prescribed positions.

2.Install the windbaffle on the unit using field supply bolts and nuts.

3.Recommended bolts to be used are 15/64" (M6 ISO standard), and the recommended length of the bolts is between 13/32 – 19/32 inch (10 – 15 mm).

4.Use washers and spring washers to tightly fasten the windbaffle to the unit.

Panel side R

Panel top

Panel front

Panel side L

Fig. 5i

Fig. 5j

NOTE

In order to prevent contact of the bolts and heat exchanger and other parts inside the unit, install the windbaffle using bolts from inside the unit and fasten the bolts with nuts from outside the unit.

When the windbaffle is installed on the unit, the unit has higher wind resistance. In order to prevent the unit from falling over, anchor the legs of the unit using anchor bolts (or similar method).

(4) Precautions for installation

1.Be sure not to damage painted surfaces.

2.Finish the edges of the windbaffle to avoid cuts or injury.

3.Drilling of holes must be carefully done so that no damage is caused to external or internal parts of the unit. Particular care must be taken that drill chips do not drop into the unit.

13

Image 99
Contents DC Inverter MULTI-SYSTEM AIR Conditioner Safety Precautions Prohibit Table of Contents Appendix a Semi-Concealed Type Wall Mounted TypeOperating Range Duct Less Type Rated Unit SpecificationsOutdoor Unit CU-3KS19NBU Indoor Unit CS-MKS9NKU ×Indoor Unit Outdoor Unit208V CU-4KS24NBU BTU/h/W Compressor Locked Rotor Amperes 20,600 CU-4KS31NBU Indoor Unit CS-MKS9NKU 4units Outdoor Unit CU-4KS31NBU 1unit 24,200 Outdoor Unit Major Component SpecificationsOutdoor Unit CU-4KS24NBU Outdoor Unit CU-4KS31NBU CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU Other Component SpecificationsDimensional Data Unit inchmm 852-0-0010-20500-0 Unit inchmm 852-0-0010-20600-0 Outdoor unit Refrigerant Flow DiagramInsulation of Refrigerant Tubing Indoor unitIndoor unit Outdoor unit 1/4 Strainer Header Sub Main Compressor Accumulator Temperature Charts Temperature Charts CU-3KS19NBUOutdoor Unit CU-3KS19NBU Indoor Unit CS-MKS7NKU × Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS9NKU × Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS12NKU × Cooling CharacteristicsOutdoor Unit CU-3KS19NBU Indoor Unit CS-MKS18NKU × Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS9NB4U × Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS12NB4U × Outdoor Unit CU-3KS19NBU Indoor Unit CS-KS18NB4UW × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS7NKU × Temperature Charts CU-4KS24NBUOutdoor Unit CU-4KS24NBU Indoor Unit CS-MKS9NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS12NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS18NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS24NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS9NB4U × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS12NB4U × Outdoor Unit CU-4KS24NBU Indoor Unit CS-KS18NB4UW × Temperature Charts CU-4KS31NBU Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS9NKU × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS12NKU × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS18NKU × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS24NKU × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS9NB4U × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS12NB4U × Outdoor Unit CU-4KS31NBU Indoor Unit CS-KS18NB4UW × Indoor Outdoor Cooling CapacityCS-MKS12NB4U × Power Supply 230V Single Phase 60Hz Cooling CapacityCS-MKS9NKU × CS-KS18NB4UW + CS-MKS12NB4U + CS-MKS12NB4U 30,600 BTU/h CS-MKS9NB4U × Cooling Capacity Low Ambient 15,180 18,570 19,250 25,420 19,410 19,360 24,830 19,520 24,260 30,760 22,560 28,790 22,730 Outdoor Unit CU-3KS19NBU 8FA2-5251-11800-1 Electric Wiring DiagramsOutdoor Unit CU-4KS24NBU 8FA2-5251-11600-1 Outdoor Unit CU-4KS31NBU 8FA2-5251-11400-1 Explanation of Functions FunctionsCool DRY Fluctuation fanLow Ambient Cooling Operation Automatic frequency control Protective FunctionsCurrent Control Description of functionCompressor Temperature Control Low Start CurrentCurrent control Precautions before Performing Inspection or Repair Troubleshooting Before Calling for ServiceTrouble Diagnosis by Error Monitor Lamps Location of the Error Monitor LampsDisplay of the Error Monitor Lamps Work procedure Check items unit operation Checking the Outdoor SystemChecking the outdoor unit Trouble Diagnosis of Each Part Problems of Each Part and Inspection PointsCompressor Inspection Points for Each PartOutdoor control circuit board FuseCU-3KS19NBU MV0 MV1 MV2 CU-4KS24NBU MV3 CU-4KS31NBU Electric expansion valveBranch tubing temperature sensor BreakerRefrigerant gas pressure Trouble Diagnosis of Fan Motor Diagnostic procedureDiagnostic results Remedy for symptom 3 toComponents mixing proportions Characteristics of New Refrigerant R410AWhat is New Refrigerant R410A? CharacteristicsChecklist before Servicing Tools Specifically for R410A Tubing Installation ProceduresCase of Compressor Malfunction Procedure for Replacing CompressorR410A from changing Amount in the charging cylinder is less than 20%Example To prevent the compositionCase Refrigerant is Leaking Welding leaking pointsRecharging Use of Existing Units When Tubes are ExtendedCharging Additional Refrigerant Retro-Fitting Existing Systems852-6-4190-581-00-1 For Outdoor Unit ContentsPlease Read Before Starting ‡ 8VHWKHIODUHPHWKRGIRUFRQQHFWLQJWXELQJ Fins of the outdoor unit. You may get injuredGeneral Installation Site Selection For wall-mounted unitsFor ceiling-mounted cassette units H1, H2, H3, H4 Connecting Indoor Units Connecting indoor unit for CU-3KS19NBUConnecting indoor unit for CU-4KS24NBU 815.88mm Locally purchased Connecting indoor unit for CU-4KS31NBU CS-MKS24NKU Back Baffle Plate for the Outdoor UnitIt is recommended to use baffle plates FrontAir Discharge Baffle Air Intake BafflePrecautions for installation CU-4KS31NBU Outer Dimensions of Outdoor UnitCU-3KS19NBU CU-4KS24NBUNever install only a single indoor unit Diagram of Outdoor Unit InstallationInstallation Process Flaring Procedure with a Flare ToolUse of the Flaring Method Tubing Connections To 0.5 mm Adjust so that the amount of tube For ceiling-mounted cassette units Insulation of Refrigerant TubingTo prevent heat loss and wet floors due to dripping of con  For wall-mounted unitsFinishing the Installation Air Purging Air Purging with a Vacuum Pump for Test Run Adapter manual, and use the adapter correctly External diameter of service port R410A 5/16If pump-down is not possible What is pump-down?Pump-down procedure  Pump DownWiring Instructions General Precautions on WiringRecommended Wire Length and Diameter Disconnect switch may be required by national or local codes For Indoor Unit How to connect wiring to the terminalFor Outdoor Unit  For solid core wiring or F-cable  For stranded wiringIndoor unit C Wiring Instructions for the Outdoor UnitIndoor unit D Indoor unit BChecking tubing and wiring Test RunPerforming a test run Installation Check Sheet Connecting a Home Automation DeviceDC1111-0