Toshiba RAV-SM2242DT-E, RAV-SM2802DT-E Refrigerant Piping and Evacuating, Pipe size

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Concealed Duct High Static Pressure

Installation Manual

 

7 REFRIGERANT PIPING AND EVACUATING

!Refrigerant Piping

1.If the outdoor units are to be mounted on a wall, make sure that the supporting platform is sufficiently strong. The platform should be designed and manufactured to maintain its strength over a long period of time, and sufficient consideration should be given to ensuring that the outdoor unit will not fall.

2.Use general copper pipes with a wall thickness of 0.8 mm for Ø12.7 mm, and with a wall thickness of 1.0 mm for Ø28.6 mm (half hard).

Do not use any copper pipes with a wall thickness less than these thicknesses.

3.Flare nut and flare works are also different from those of the conventional refrigerant.

Take out the flare nut attached to the main unit of the air conditioner, and use it.

REQUIREMENT

When the refrigerant pipe is long, provide support brackets at intervals of 2.5 to 3m to clamp the refrigerant pipe. Otherwise, abnormal sound may be generated.

CAUTION

IMPORTANT 4 POINTS FOR PIPING WORK

1.Remove dust and moisture from the inside of the connecting pipes.

2.Tight connection (between pipes and unit)

3.Evacuate the air in the connecting pipes using

VACUUM PUMP.

4.Check the gas leakage. (Connected points)

Flaring

Cut the pipe with a pipe cutter. Remove burrs completely.

Remaining burrs may cause gas leakage.

Insert a flare nut into the pipe, and flare the pipe. As the flaring sizes of R410A differ from those of refrigerant R22, the flare tools newly manufactured for R410A are recommended.

B

However, the conventional tools can be used by adjusting projection margin of the copper pipe.

Projection margin in flaring: B (Unit: mm)

Rigid (Clutch type)

Outer dia. of

R410A tool used

Conventional tool

 

used

copper pipe

 

 

R410A

R410A

 

 

 

 

12.7

0 to 0.5

1.5 to 2.0

 

 

 

Flaring dia. meter size: A (Unit: mm)

 

 

A +0

Outer dia. of copper pipe

 

-0.02" (–0.4)

 

R410A

 

 

 

 

 

12.7

 

16.6

 

 

 

* In case of flaring for R410A with the

A

conventional flare tool, pull it out approx.

0.5mm more than that for R22 to adjust to the specified flare size.

The copper pipe gauge is useful for adjusting projection margin size.

EN

!Pipe size

Pipe size

Gas side

28.6 mm

 

 

Liquid side

12.7 mm

 

 

!Liquid side refrigerant pipe connection

Permissible Piping Length and Height Difference

They vary according to the outdoor unit.

For details, refer to the Installation Manual attached to the outdoor unit.

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22-EN

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Contents Installation Manual Contents Agent Qualifications and knowledge which the agent must have Concealed Duct High Static Pressure Installation ManualWork undertaken Protective gear worn Burst Hazard General Precautions for SafetySelection of installation location InstallationRelocation Electrical wiringTest run Explanations given to userTo Disconnect the Appliance from Main Power Supply Usage Accessory PartsPart name ’ty Avoid installing in the following places Selection of Installation PlaceInstallation under high-humidity atmosphere Unit mm Installation spaceFilter cleaning sign term setting Installation exampleExternal Dimensions InstallationTreatment of ceiling Installation of hanging boltInstallation of indoor unit Installation of hanging boltAir outlet port flange Diagrams for making connecting flangesAir inlet port connecting flange Duct design Duct installation example First floorRAV-SM2242 Type FAN CharacteristicsRAV-SM2802 Type High static pressure F3 Wire connection change of fan motorLow static pressure F1 Standard Middle static pressure F2Drain Piping Work Pipe material Connecting drain pipePipe material, size and insulator Drain upCheck the draining Heat insulating process Liquid side refrigerant pipe connection Refrigerant Piping and EvacuatingRefrigerant Piping Pipe sizePiping with outdoor unit Gas side refrigerant pipe connectionEvacuation Tightening connectionHeat insulation process Refrigerant amount to be addedOpen the valve fully Gas leak checkWiring Wiring diagramPower and Wiring Specification Remote controller wiringTerminal block of electrical control box Wire connectionGroup control Remote Controller WiringWiring diagram Applicable Controls Changing of setting applicable controlWhen power is turned on for the second or later time Basic procedure for changing settingsTo secure better effect of heating Filter sign settingPower saving mode Detection temperature shift valueIndoor unit data Remote controller switch monitoring functionOutdoor unit data Code No Data nameGroup control for system of multiple units Group controlManual address setup procedure Procedure example33-EN 0000 8C OperationExecute a test run 10TEST RUNBefore test run Daily maintenance Cleaning of air filter 11MAINTENANCEPart Unit Check visual/auditory Maintenance Maintenance ListConfirmation and check 12TROUBLESHOOTINGConfirmation of error log Status Error codes and parts to be checked40-EN
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RAV-SM2242DT-E, RAV-SM2802DT-E specifications

Toshiba has long been a leader in heating, ventilation, and air conditioning (HVAC) technology, offering innovative solutions that cater to both residential and commercial needs. Among their impressive lineup, the Toshiba RAV-SM2802DT-E and RAV-SM2242DT-E stand out as exceptional models designed for efficiency, performance, and comfort.

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