Sanyo 85464359981002 installation instructions AIR Purging

Page 65

7. AIR PURGING

Air and moisture in the refrigerant system may have undesirable effects as indicated below.

●pressure in the system rises

●operating current rises

●cooling (or heating) efficiency drops

●moisture in the refrigerant circuit may freeze and block capillary tubing

●water may lead to corrosion of parts in the refrigerant system

Therefore, the indoor unit and tubing between the indoor and outdoor unit must be leak tested and evacuated to remove any noncondensables and moisture from the system.

■Air Purging with a Vacuum Pump (for Test Run) Preparation

Check that each tube (both liquid and gas tubes) between the indoor and outdoor units has been properly connected and all wiring for the test run has been completed. Remove the valve caps from both the gas tube and liquid tube service valves on the outdoor unit. Note that both liquid and gas tube service valves on the outdoor unit are kept closed at this stage.

Manifold gauge

Fig. 7-1

Vacuum pump

Outlet

Inlet

Fig. 7-2

Manifold valve

Leak test

(1)Attach a manifold valve (with pressure gauges) and dry nitrogen gas cylinder to this service port with charge hoses.

CAUTION

Use a manifold valve for air

purging. If it is not available, use

 

 

 

a stop valve for this purpose. The

 

“Hi” knob of the manifold valve

 

must always be kept closed.

(2)Pressurize the system to no more than

512 psig (36 kgf/cm2G) with dry nitrogen gas and close the cylinder valve when the gauge reading reaches 512 psig (36 kgf/cm2G). Then, test for leaks with liquid soap.

CAUTION

To avoid nitrogen entering the

refrigerant system in a liquid state,

 

 

 

the top of the cylinder must be

 

higher than the bottom when you

 

pressurize the system. Usually,

 

the cylinder is used in a vertical

 

standing position. (Refer to the

 

previous page.)

Pressure gauge

Gas tube

Liquid tube

Lo Hi

Charge hose

Cylinder valve

Nitrogen gas cylinder (In vertical standing position)

Service port ø5/16"

Open

Close

Outdoor unit

Open

Close

Fig. 7-3

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Contents Optional Controllers R410A Models Indoor UnitsOutdoor Units …In a Room Special Precautions…In Moist or Uneven Locations …In an Area with High WindsCheck of Density Limit Be sure to recharge the refrigerant only in liquid form Care regarding tubingDifferent tools required Manifold gauge Vacuum pumpSingle-outlet valve Compressor specifications are differentExisting tubing cannot be used especially R22 R410AContents AIR Purging HOW to Process TubingTest RUN AppendixGeneral Concealed Duct 4-Way Air Discharge Semi-Concealed1-Way Air Discharge Semi-Concealed Ceiling-Mounted Concealed Duct High-Static PressureWall-Mounted Tubing Size Main Tubing Size LA11 Straight Equivalent Length of Joints Tubing Length Items Marks ContentsPay special attention to any Installing Distribution JointLocation, such as a basement Can accumulate, since refrigAPR-P160BA Optional Distribution Joint KitTightening torque for valve stem cap 240 280 lbs · Main tubing Distribution joint tubing ExampleIndoor Unit Selecting the Installation SiteCeiling-Mounted Type Wall-Mounted TypeCase of multiple installations Installation spacePrecautions for Installation in Heavy Snow Areas Installing the Unit in Heavy Snow AreasAir Discharge Chamber for Top Discharge Countermeasures against snow and windWind CHX03652/06052Front and both sides must remain open 28-13/16 17-23/32 47-19/32 Obstacle to the front of unit Obstacle to the rear of unitObstacles to the front and rear of unit Installation in front-rear rowsSuspending the Indoor Unit HOW to Install the Indoor UnitPlacing the Unit Inside the Ceiling 12, 18, 24PVC pipe must be purchased separately. Installing the Drain PipingOn the indoor control board Start when you short the pinBe careful since the fan will Removing the corner cover Main unit Gaps Ceiling surface Installing the Ceiling PanelWiring the Ceiling Panel When Removing the Ceiling Panel for Servicing Checking After InstallationAdjusting the Auto Flap Special Remarks DC Fan Tap Change ProcedureFollow the diagrams to make the holes in the ceiling Full-scale Installation diagram Suspension lug 25/32 1 Suspension bolts Tubing side Unit Ceiling Material 25/32 Be careful since the fan will start Wiring connections Electrical Power WiringWiring Appearance Part nameRemoving the side panel Removing the intake grilleMust be no gap Indoor unit Ceiling surface Ceiling panel Installing the intake grille Installing the side panel and intake grilleOther Check after installation If a wireless remote controller is usedNumber of duct flanges Type LengthIt is important that you use extreme care Enough to support the weight of the unitSupporting the indoor unit inside Ceiling. Ensure that the ceiling is strongPipe Increasing the Fan Speed How to read the diagramShort the pin on the indoor control board 78 and -5 show the detailed dimensions Enough to suport the weight of the unit Indoor Fan Performance How to Read the Diagram Unit Refrigerant tubing drain hose positionWall and ceiling side opening position Weight of the unit. BeforeIt is important that you use Indoor unit from the ceilingInside Rear outlet port Duct for Fresh AirShaping the Tubing When removing the fastening How to carry out power supply wiringBracket from the cover BracketSelecting and Making a Hole If the Wall is Brick, Concrete or Similar Removing the Grille to Install the Indoor UnitRemoving the grille Attaching the grilleDo not supply power to the unit or operate Installing the Drain HoseIt until all tubing and wiring to the outdoor Right-rear tubingKHX2452 KHX0752 / 0952 / 1252HOW to Install the Outdoor Unit General Precautions on Wiring Electrical WiringCHX03652 For field wiring rules, please refer CHX06052U, D, T Type Wiring System DiagramOutdoor unit How to connect wiring to the terminal For stranded wiring That all wiring is tightlyResult in unit malfunction Fire hazard may alsoFlaring Procedure with a Flare Tool HOW to Process TubingConnecting the Refrigerant Tubing Use of the Flaring Method Tube diameter Tightening torque Tube thickness Approximate Two tubes arranged together Insulating the Refrigerant Tubing Tubing InsulationInsulation material After a tube has beenTaping the Tubes Finishing the InstallationAIR Purging Evacuation Finishing the job Use a cylinder designed forCharging additional refrigerant Test RUN YES Test Run Procedure Items to Check Before the Test RunOutdoor Unit PCB Setting Examples of the No. of indoor units settings Automatic Address Setting from the Outdoor Unit Auto Address Setting Basic wiring diagram ExampleIf link wiring is used Automatic Address Setting from Outdoor Unit Automatic Address Setting no compressor operationSetting in heating mode begins Automatic Address Setting in Heating ModeAutomatic Address Setting from the Remote Controller Automatic Address Setting in Cooling ModeDisplay during automatic address setting Checking the indoor unit addresses If 1 indoor unit is connected to 1 remote controllerRemote Controller Test Run Settings LED Alarm Type 4-WAY Care and CleaningTips for Energy Saving Latch Air intake Safety chain Grille Bolt screwsWater drain Air outlet Air intake Ceiling panel optional Remove the air filter from the air intake grilleTroubleshooting Electrical box Air outlet side duct flange Concealed Duct High-Static Pressure Type U, D TypeCanvas duct optional Troubleshooting Air intake grille air intake CEILING-MOUNTEDOr soot Type Wall-Mounted Tips for Energy Saving

85464359981002 specifications

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