Toshiba RAS-13UAV-E2, RAS-13UKV-E2 Refrigerant R410A, Safety During Installation/Servicing

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FILE NO. SVM-03008

2. REFRIGERANT R410A

This air conditioner adopts the new refrigerant HFC (R410A) which does not damage the ozone layer.

The working pressure of the new refrigerant R410A is

1.6times higher than conventional refrigerant (R22). The refrigerating oil is also changed in accordance with change of refrigerant, so be careful that water, dust, and existing refrigerant or refrigerating oil are not entered in the refrigerant cycle of the air conditioner using the new refrigerant during installation work or servicing time.

The next section describes the precautions for air conditioner using the new refrigerant. Conforming to contents of the next section together with the general cautions included in this manual, perform the correct and safe work.

2-1. Safety During Installation/Servicing

As R410A’s pressure is about 1.6 times higher than that of R22, improper installation/servicing may cause a serious trouble. By using tools and materials exclu- sive for R410A, it is necessary to carry out installation/ servicing safely while taking the following precautions into consideration.

(1)Never use refrigerant other than R410A in an air conditioner which is designed to operate with R410A.

If other refrigerant than R410A is mixed, pressure in the refrigeration cycle becomes abnormally high, and it may cause personal injury, etc. by a rupture.

(2)Confirm the used refrigerant name, and use tools and materials exclusive for the refrigerant R410A. The refrigerant name R410A is indicated on the visible place of the outdoor unit of the air condi- tioner using R410A as refrigerant. To prevent mischarging, the diameter of the service port differs from that of R22

(3)If a refrigeration gas leakage occurs during instal- lation/servicing, be sure to ventilate fully.

If the refrigerant gas comes into contact with fire, a poisonous gas may occur.

(4)When installing or removing an air conditioner, do not allow air or moisture to remain in the refrigeration cycle. Otherwise, pressure in the refrigeration cycle may become abnormally high so that a rupture of personal injury may be caused.

(5)After completion of installation work, check to make sure that there is no refrigeration gas leakage.

If the refrigerant gas leaks into the room, coming into contact with fire in the fan-driven heater, space heater, etc., a poisonous gas may occur.

(6)When an air conditioning system charged with a large volume of refrigerant is installed in a small room, it is necessary to exercise care so that, even when refrigerant leaks, its concentration does not exceed the marginal level.

If the refrigerant gas leakage occurs and its concentration exceeds the marginal level, an oxygen starvation accident may result.

(7)Be sure to carry out installation or removal according to the installation manual. Improper installation may cause refrigeration trouble, water leakage, electric shock, fire, etc.

(8)Unauthorized modifications to the air conditioner may be dangerous. If a breakdown occurs please call a qualified air conditioner technician or electrician.

Improper repair’s may result in water leakage, electric shock and fire, etc.

2-2. Refrigerant Piping Installation

2-2-1. Piping materials and joints used

For the refrigerant piping installation, copper pipes and joints are mainly used. Copper pipes and joints suit- able for the refrigerant must be chosen and installed. Furthermore, it is necessary to use clean copper pipes and joints whose interior surfaces are less affected by contaminants.

(1)Copper Pipes

It is necessary to use seamless copper pipes which are made of either copper or copper alloy and it is desirable that the amount of residual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed or discolored portion (especially on the interior surface). Otherwise, the expansion valve or capillary tube may become blocked with contaminants.

As an air conditioner using R410A incurs pressure higher than when using R22, it is necessary to choose adequate materials.

Thicknesses of copper pipes used with R410A are as shown in Table 2-2-1. Never use copper pipes thinner than 0.8 mm even when it is available on the market.

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Contents AIR Conditioner Contents HOW to Replace the Main Parts Specifications SpecificationsOperation Characteristic Curve Capacity Variation Ratio According to TemperatureRefrigerant R410A Safety During Installation/ServicingRefrigerant Piping Installation Piping materials and joints usedOuter diameter mm R410A R22 1 Thicknesses of annealed copper pipesThickness mm Processing of piping materialsWidth Flare tool for R410A Conventional flare toolClutch type Wing nut type Diameter·m kgf·cm ·m kgf·mTools Required toolsGeneral tools Conventional tools can be used 1 Configuration of refrigerant charging Recharging of RefrigerantBrazing of Pipes Activated flux Characteristics required for fluxTypes of flux Noncorrosive flux BrazingIndoor Unit 215Outdoor Unit Cover PVWiring Diagram 1 Simple Check for Failure DiagnosisCheck Item Diagnosis Result BRW Parts name Specification of Electrical PartsSpecifications RatingRefrigerant Cycle Diagram Refrigerant Cycle DiagramOperation Data Control Block Diagram RaysOutdoor Unit Inverter Assembly MCC813P.C.BOperation Description Outlined of Air Conditioner Control1 Compressor revolution range Operation Model Power factor improvement controlCapacity control Revolution rpsLouver control Prevent-freezing control5. P.M.V. Pulse Modulating Valve Indoor fan control DC fan motorOutdoor fan control DC fan motor Model nameCompressor revolution rps From Description of Operation Circuit Cooling capacity controlLimit for maximum compressor motor speed By indoor fan speedBasic control Heating operationHigh-temp. release control Starting and in stability StabilityHeating capacity control Defrost controlAutomatic operation TimeTemporary auto operation Temporary OperationTemporary button Control Temporary cooling operationWhen the unit is in operation Operation How to set auto restart functionWhen the unit is on standby Not operating Operation Auto Restart FunctionFilter Check Lamp Remote Control and its Functions Timer and clock time display Mode displayTemperature display Hi-POWER displayFile NO. SVM-03008 Installation Procedure Safety CautionsTo Disconnect the Appliance from the Main Power Supply File NO. SVM-03008 Installation Diagram of Indoor and Outdoor Units AttachOptional installation parts Part Parts name ’ty Code Fixing bolt arrangement of outdoor unitName Accessory and installation partsOthers OptionNew tools for R410A Applicable to R22 model Changes Mounting the installation plate Installation placeRemote controller Cutting a holeWhen the installation plate is directly mounted on the wall Electrical workHow to remove the Drains Cap Die-cutting Front panel slitChanging drain hose Left-hand connection with piping How to fix the Drains CapCase of right or left piping Case of bottom right or bottom left pipingIndoor unit fixing Drainage Run the drain hose sloped downwardsR410A Conventional Copper pipe Tool used Refrigerant piping connection FlaringProjection margin in flaring a Unit mm Copper pipe Tightening connectionShaping pipes Using a vacuum pumpOuter dia Tightening torque Copper pipe EvacuatingPacked valve handling precautions Wiring connectionStripping length of connection cable Gas leak test Auto restart settingHow to set the auto restart Test operationHOW to Diagnose the Trouble First ConfirmationPrimary Judgment Operation which is not a trouble Program operationOperation of air conditioner Description Indoorindication Judgment by Flashing LED of Indoor UnitSelf-Diagnosis by Remote Control Check Code How to use remote control in service modeCause of operation Short circuit. Replace Judgment of Trouble by Every Symptom Check ItemTurn on power supply Only indoor fan motor does not operate Primary check YESInspection procedure Troubleshooting for remote control Pipe clogging Check Code 1C Miswiring in indoor/outdoor units and 1E Check procedureHow to Diagnose Trouble in Outdoor Unit AGE on P.C. boardInspection procedures How to Check Simply the Main PartsDiagnosis/Process flowchart Contents Summary Main P.C. board partCheck procedures Procedure Check points Symptom Causes OPERATION, TIMER, PRE. DEFSensor characteristic table 10-8-2. P.C. board layoutBottom View Indoor unit Other parts Part name Checking procedure Outdoor unit Part name Checking procedureChecking Method for Each Part Part name Checking procedure Diode check Igbt checkSymptom CauseHOW to Replace the Main Parts Part name Procedures RemarksFigure below For position of the fan motor connector Microcomputer Detachment Requirement Connector is one Assembly to other parts Fan motor Perform work of item 1 of 1 Set take-out part of the lead wire of coil to Part name Board layout MCC-813 Exploded Views and Parts List Indoor Unit E-Parts AssyFront Panel Assy Cabinet, Front, Assy Outdoor Unit E-Parts Assy Toshiba Carrier Corporation

RAS-13UAV-E2, RAS-13UKV-E2 specifications

The Toshiba RAS-13UKV-E2 and RAS-13UAV-E2 air conditioning units represent a significant step forward in both comfort and energy efficiency. Designed for residential and light commercial use, these models are packed with features that cater to diverse climate control needs while adhering to modern standards of sustainability.

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