TOSHIBA RAS-3M26G3AVG-E RAS Multi Split Inverter Outdoor Air Conditioner Installation Guide

TOSHIBA RAS-3M26G3AVG-E RAS Multi Split Inverter Outdoor Air Conditioner

Product Information

Specifications

• Cooling operation: Yes
• Heating operation: Yes
• Height: 890 mm (RAS-5M34G3AVG-E), 900 mm (RAS-4M27G3AVG-E), 320 mm (RAS-3M26G3AVG-E)
• Dimension: Width – 78 kg, 68 kg, 67 kg
• Net weight: 2.39 kg, 2.05 kg, 1.90 kg
• Refrigerant: R32
• Power supply: 1 ph, 50 Hz, 220-240 V
• Maximum running current: 19.0 A, 17.5 A, 16.1 A
• Circuit breaker rating: 25 A
• Pipe length: Minimum for 1 unit – 3 m, Maximum for total unit – 25 m
• Height difference: 15 m to 40 m

Product Usage Instructions

Installation/Service Tools

Ensure you have the following tools ready for installation:

• Gauge manifold for R32
• Charge hose for R32
• Vacuum pump for R32
• Gas leakage detector for R32
• Phillips screwdriver
• Level
• Scale
• Utility knife
• Pipe cutter
• Torque wrench
• Wrench (or spanner)
• Reamer
• Flare tool for R32
• 4 mm hexagonal wrench

Installation Instructions

Follow these steps to install the outdoor unit:

1. Refer to the installation manual for details on installing indoor units.
2. Ensure minimum floor area requirements are met when combined with indoor products.
3. Use appropriate tools and equipment as listed above.
4. Check local regulations for any additional requirements.

Operating Conditions

Understand the operating conditions for cooling and heating operations:

• Dry operation is supported.
• Ensure the power supply meets specifications.
• Check refrigerant levels and adjust if necessary.

FAQ

• Q: Can I use this outdoor unit with any indoor unit?
• A: The performance of the air conditioner varies based on the combination of indoor units used. Refer to the owner’s manual for compatibility.
• Q: What refrigerant does this unit use?
• A: This unit uses R32 refrigerant.
• Q: Are there any special requirements for installation?
• A: Minimum floor area, refrigerant charge limits, and other installation specifications should be checked as per local regulations.

NOTE

• Descriptions about operations for the E unit in this manual do not apply to RAS-4M27G3AVG-E.
• Descriptions about operations for the D unit and the E unit in this manual do not apply to RAS-3M26G3AVG-E.

Please read this Installation Manual carefully before installing the Air Conditioner.

• This Manual describes the installation method of the outdoor unit.
• For installation of the indoor unit, refer to the Installation Manual attached to the indoor unit.

IMPORTANT NOTICE
For details on how to install the indoor units, refer to the installation manual accompanying the indoor units.

WARNING

• In accordance with IEC60335-2-40 2018 a minimum floor area MUST be observed when installing the Multi System air conditioner. Follow the table below to calculate the minimum floor area for the installed product.

Refrigerant amount (kg)

| Minimum floor area, When combined with indoor product. (m 2 )
---|---

BI-FLOW CONSOLE

| BI-FLOW CONSOLE

with refrigerant detection sensor RB-T301-E

| ****

HIGH- WALL

| ****

1-WAY, 4-WAY CASSETTE

| ****

DUCT

≤1.84| ̶| ̶| ̶| ̶| ̶
1.92| 32| 7| 4| 2| 2
2.12| 39| 7| 4| 3| 3
2.32| 46| 8| 5| 3| 3
2.39| 49| 8| 5| 4| 4
2.52| 54| 9| 6| 4| 4
2.72| 63| 9| 7| 5| 5
2.92| 73| 10| 8| 5| 5
3.19| 87| 11| 10| 6| 6

PLEASE CHECK LOCAL REGULATIONS WHICH MAY IMPOSE DIFFERENT, MORE RESTRICTIVE LIMITS ON REFRIGERANT CHARGE LIMITS, ROOM AREAS AND PERMITTED INSTALLATION LOCATION.

Installation/service tools

Changes in the product and components

• In air conditioners using R32, to prevent any other refrigerant from being accidentally charged, the service port diameter size of the outdoor unit service valve has been changed. (1/2 UNF 20 threads per inch)
• In order to increase the pressure-resisting strength of the refrigerant piping, the flare processing diameter and opposing flare nut sizes have been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)

Gauge manifold for R32 Phillips screwdriver Pipe cutter Flare tool for R32
Charge hose for R32 Level Torque wrench 4 mm hexagonal wrench
Vacuum pump for R32 Scale Wrench (or spanner)
Gas leakage detector for R32 Utility knife Reamer

Specifications

Operating conditions*1

| Cooling operation| –10 to 46 °C
Dry operation| –10 to 46 °C
Heating operation| –20 to 24 °C

Dimension

| Height| 890 mm
Width| 900 mm
Depth| 320 mm
Net weight| 78 kg| 68 kg| 67 kg
Refrigerant R32| 2.39 kg| 2.05 kg| 1.90 kg
Power supply| 1 ph, 50 Hz, 220-240 V
Maximum running current| 19.0 A| 17.5 A| 16.1 A
Circuit breaker rating| 25 A
Power cord (H07RN-F or 60245IEC66)| 3-core 4.0 mm² or more| 3-core 3.5 mm² or more
Connecting cable (H07RN-F or 60245IEC66)| 4-core 0.75 mm² or more

Pipe length

| Minimum for 1 unit| 3 m
Maximum for 1 unit| 25 m
Maximum for total unit| 80 m| 70 m
Height difference| 15 m
No additional refrigerant charge| 40 m
Refrigerant adjustment| 20 g/m (41 m – 80 m)| 20 g/m (41 m – 70 m)

• The specifications for the performance of this air conditioner differ depending on the combination of the indoor units that are operated.
• The information in this specifications table applies to the combinations with the catalogue.
• For operation, read the owner’s manual packed with the indoor unit.
• Equipment complying with IEC 61000-3-12.
• 1 If the air conditioner is used in conditions other than the above, the safety protection functions may be activated.
• Example of indoor unit class: RAS-10PKVSG-E is abbreviated as “10”.

All combinations that do not exceed the “Total” number can be installed.
More than 2 indoor units must be connected to an outdoor unit.
When 2 indoor units are connected to an outdoor unit, note that some combinations of indoor units are not compatible. For further details, refer to the catalogue.

• 2 Need the reducer (12.7 to 9.52 mm).
• 3 Need the expander (9.52 to 12.7 mm).
• Locally procured.

Optional parts, accessories

Optional parts

Refrigerant piping*4

| Indoor unit (abbreviation)| Liquid side (O.D.)| Gas side (O.D.)| ****

1 ea.

05, 07, 10, 13| 6.35 mm| 9.52 mm
16, 18, 22, 24| 6.35 mm| 12.7 mm
Putty, PVC tapes|  | 1 ea.

• Refrigerant piping covered with insulating material (Polyethylene foam, 6 mm thick) When duct-type or cassette-type unit is to be installed, it shall be covered with thicker insulating material (Polyethylene foam, 10 mm thick)

Accessories

Installation of the outdoor unit

Installation Location

• A place that can bear the weight of the outdoor unit and does not cause an increase in noise level and vibration.
• A place where the operation noise and air discharge do not disturb neighbours.
• A place that is not exposed to strong wind.
• A place free of combustible gas.
• A place that does not block a passageway.
• A place where the drain water does not cause any problems.
• A place where there are no obstructions near its air intake or air discharge.

Installation in the following places may result in trouble:

• A place with a lot of machine oil.
• A place with a saline-rich atmosphere such as a coastal area.
• A place with a high level of sulphide gas.
• A place where high-frequency waves are likely to be generated, such as from audio equipment, welders, or medical equipment.

Do not install the unit in such places.

CAUTION
When the outdoor unit is installed in a place where the drain water might cause any problems, Seal the water leakage point tightly using a silicone adhesive or caulking compound.

Precautions for Installation

• When the outdoor unit is to be installed in an elevated position, be sure to secure its feet.
• If the outdoor unit is to be mounted on a wall, make sure the base plate supporting it is sturdy enough.
• The base plate should be designed and manufactured to maintain its strength over a long time, and sufficient consideration should be given to ensure that the outdoor unit will not fall.
• When the outdoor unit is installed in a place that is always exposed to strong wind such as a coastal area or on a high story of a building, secure the normal fan operation using a duct or a windshield.
• Especially in windy areas, install the unit in such a way as to prevent the admission of wind.
• When the outdoor unit is to be mounted high on a wall, take particular care to ensure that parts do not fall and that the installer is protected.
• When doing installation work at ground level, it is usual to make wiring and pipe connections to the indoor units first and then to make connections to the outdoor units.
• However, if outdoor work is difficult, you can change the procedure.
• For example, by making adjustments to the wiring and piping lengths on the inside (rather than the outside).
• When using an air conditioner under low outside temperature conditions (Outside temp: -5 °C or lower) In COOL mode, prepare a duct or windshield so that it is not affected by the wind.

Necessary Space for Installation
If you need to install the outdoor unit in a location where there are some obstructions or a wall, secure sufficient space as shown in the figure below.
The cooling/heating effect may be reduced by 10%.

Draining Off the Water from the Outdoor Unit
Install 5 waterproof rubber caps and the drain nipple to drain off the water from the outdoor unit.

• Seal the knock-out holes and screw/thread areas tightly using a silicon adhesive or a caulking compound.
• Use a drain pan to apply a centralized drain.

Installation in Regions with Snowfall and Cold Temperatures
Do not use waterproof rubber caps or a drain nipple.

• If you need to install the outdoor unit in a location where there is a possibility of the drain freezing, pay close attention so that the drain does not become frozen.
• To protect the outdoor unit from snow, install the outdoor unit on a holding frame, and attach a snow protection hood and plate.
• Keep the outdoor unit at least 500 mm above the snow accumulation line.

Fixing the Outdoor Unit
Fix the outdoor unit using attachment bolts.

• Use 8 mm or 10 mm anchor bolts and nuts.
• Do not allow the attachment bolts to protrude by more than 15 mm.
• Install the outdoor unit at ground level.
• Attach the vibration-proof rubber pads under the fixing legs.

• Support the bottom surface of the mounting leg that is in contact with and underneath the bottom plate of the outdoor unit.

Refrigerant piping
CAUTION
Install in rooms that are 13 m3 or larger.
If a leak of refrigerant gas occurs inside the room, an oxygen deficiency may occur.

Detaching the Front Panel
Remove the 5 screws.

• Pull out the front panel according to the direction of the arrows in the illustration below.

Refrigerant Piping Connection
Flaring

1. Cut the pipe with a pipe cutter.

2. Remove the burr inside of the pipe.
   When removing the burr, be careful so that chips do not fall into the pipe.

3. Remove the flare nuts attached to the outdoor/indoor unit, then insert them into each of the pipes.

4. Flare the pipes.
   See the following table for the projection margin (A) and flaring size (B).

Outside diameter

|

Thickness

| Rigid (clutch type) R32 tool| Imperial (wing nut type) R32 tool|  |

Width across flat

|

Tighten torque

mm| mm| mm| mm| mm| mm| N•m| kgf•m
6.35| 0.8| 0 to 0.5| 1.5 to 2.0| 9.1| 17| 14 to

18

| 1.4 to 1.8
9.52| 0.8| 0 to 0.5| 1.5 to 2.0| 13.2| 22| 33 to

42

| 3.3 to 4.2
12.7| 0.8| 0 to 0.5| 2.0 to 2.5| 16.6| 26| 50 to

62

| 5.0 to 6.2

CAUTION

• Do not scratch the inner surface of the flared part when removing burrs.
• Flare processing under the condition of scratches on the inner surface of the flare processing part will cause a refrigerant gas leak.

Pipe connection

1. Make wire and pipe connections for each indoor unit separately.
2. Align the centres of the connecting pipes and tighten the flare nut as much as possible with your fingers, then tighten the nut using a torque wrench.

Be sure to tighten the nut at the specified torque value.

• If you use one outdoor unit for several indoor units of a different class, connect the largest one first A, then connect the rest in the order B to E.
• Do not remove the flare nuts for any ports you are not going to use for connection.
• Do not leave the flare nut unattached for a long time.
• Use a different-diameter joint if the diameters of the connection port and connection piping are different.
• Mount the different-diameter joint on the connection port of the outdoor unit.

CAUTION
KEEP IMPORTANT 7 POINTS FOR PIPING WORK.

1. Take away dust and moisture (inside of the connecting pipes).
2. Tighten the connections (between pipes and unit).
3. Evacuate the air in the connecting pipes using a VACUUM PUMP.
4. Check gas leak (connected points).
5. Be sure to fully open the packed valves before operation.
6. Reusable mechanical connectors and flared joints are not allowed indoors. When mechanical connectors are reused indoors, sealing parts shall be renewed. When flared joints are reused indoors, the flare part shall be refabricated.
7. Don’t operate air conditioner in case no refrigerant in the system.

Air Purge
For the sake of environmental protection, use a vacuum pump to extract the air during installation.
Prepare a 4 mm hexagon wrench.

1. Connect a charged hose.

   • Make sure that the Handle Hi of the gauge manifold valve is closed fully.
   • Connect the port of the gauge manifold valve and the service port (Valve core (Setting Pin)) using the charge hose.
     NOTE
     If a control valve or charge valve is attached to the charge hose, a leak of R32 refrigerant can be avoided.

2. Open the Handle Low of the gauge manifold valve fully, then operate the vacuum pump.

   • Loosen the flare of the nut off at the gas end a little to make sure that air is taken in, then tighten the nut.
   • If you find the air is not taken in, make sure that the charge hose is connected to the port(s) securely.
   • Perform extraction for about 40 minutes and make sure that the compound pressure gauge reading is –101 kPa (–76 mmHg).
   • If the compound pressure gauge reading is not –101 kPa (–76 mmHg), there is a possibility air is being taken in from the port(s).
   • Make sure that the charge hose is connected to the port(s) securely.

3. Close the Handle Low of the gauge manifold valve fully, then stop operating the vacuum pump.

   • Leave the gauge and pump as they are for 1 or 2 minutes, then make sure that the compound pressure gauge reading stays at –101 kPa (–76 mmHg).
   • You need not add refrigerant if the piping length is 40 m or less.
   • If the length exceeds 41 m, add 20 g of refrigerant per 1 meter over.

4. Disconnect the charge hose from the service port, then open the valve stem fully using a 4 mm hexagon wrench.

5. Tighten the service valve stem cap and service port cap securely.
   CAUTION
   Use a torque wrench and tighten the nut at the specified torque value.

6. Tighten all the caps on the valves securely, then perform a gas leak inspection.

   • The cap with the 9.52 mm outer diameter is available in two sizes under the type of packed valve for which the cap is used.
     The tightening torque depends on the width across the ats of the cap so check it in the table below

Charging Refrigerant

• You need not add refrigerant if the piping length is 40 m or less.
• If the length exceeds 41 m, add 20 g of refrigerant per 1 meter over.

Procedure to Charge Refrigerant

• After extraction is complete, close the valves, and then charge the refrigerant.
• Make sure that no operations are in progress while charging the refrigerant.
• If you cannot charge the refrigerant fully, add it from the service port of the service valve at the gas end while the cooling operation is in progress.

NOTE

• Charge the refrigerant in a liquid state.
• If you charge the refrigerant in a gas state, the air conditioner will not operate properly since the refrigerant changes its composition.

Precautions for Adding Refrigerant

• Use a scale with a precision of at least 10 g per index line when adding the refrigerant.
• Do not use bathroom scales or similar instruments.
• Use liquid refrigerant when refilling.
• Since the refrigerant is in liquid form, it can fill up quickly.
• Therefore add the refrigerant gradually.

Insulation of the Refrigerant Pipes

• Insulate the refrigerant pipes for liquid and gas separately.

Gas Leak Inspection

• Perform a gas leak inspection for the flare nut connections, valve stem connection, and service port cap without fail.
• Use a leak detector exclusively manufactured for R32.

Performing Additional Installation of an Indoor Unit

1. Collect refrigerant from the outdoor unit.
2. Turn off the circuit breaker.
3. Perform additional installation referring to the procedure from “Refrigerant Piping Connection” on the previous page.

Pump-down Operation (Recovering refrigerant)
CAUTION
Since the forcible running for collecting refrigerant stops automatically after 10 minutes, fi nish collecting refrigerant within 10 minutes.
Electric current is applied on the control board. Beware of electric shock.

• The following must be certainly done during pump down.
• Do not incorporate air into the refrigeration cycle.
• Close the 2 service valves. Stop the compressor and remove the refrigerant pipe.

If the refrigerant pipe is removed when the compressor is operating and service valves are opened, the refrigerant cycle will inhale unwanted matter such as air and the pressure in the cycle becomes abnormally elevated. It may cause a burst or injury.

1. Detach the front panel. Do not remove the air discharge grille.
2. Turn on the circuit breaker to supply electricity.
   In the initial LED display status, D805 is lighted as below.

• ○: ON, ●: OFF, ⌾ : Rapid Flashing (5 times/sec.),
• ◇: Slow Flashing (1 time/sec.)

• Start running all the indoor units connected to the outdoor unit in the cooling mode.
• The checking procedure cannot be completed if the cooling mode is not operated in every indoor unit.

• Hold down SW81 for at least 5 seconds, and check that D800 is lighted and the D804 light is flashing (1 time/sec.).

• Press SW81 for 1 time. Then D804 light is flashing (5 times/sec.).

• Press SW82 for 1 time. Then D805 light is fl ashing (5 times/sec.).

• Hold down SW82 for at least 5 seconds. Then the outdoor unit starts cooling mode.
• (The display is kept during the refrigerants collection operation.)

• Close the valve stem of the service valve at the liquid end.
• Make sure that the compound pressure gauge reading is –101 kPa (–76 mmHg)
• Close the valve stem of the service valve at the gas end.
• The refrigerant collection operation is finished in a maximum of 10 minutes.
• After the collection is finished, promptly stop the operation of all the indoor units.
• (There are cases in the compressor restarts.)
• When you want to start over the operation of the SW81 and SW82, press the SW81 and SW82 at the same time for 5 sec. (It back to the initial condition of 3.)
• However, do not execute the operation during the refrigerant collection.
• If by any chance the collection is stopped by the operation, start over the refrigerant collection operation.

Electrical work
WARNING

• Be sure to comply with local regulations/codes when running the wire from the outdoor unit to the indoor unit.
• (Size of wire and wiring method etc.)
• A lack of electrical capacitance or incorrect wiring may cause an electric shock or a fire.
• To make sure that the wiring connections are secure, use designated cables.
• Fix the cables securely so that no external force applied to the cables may affect the terminals.
• If wiring connections are incomplete or cables are not fixed securely, it may cause a fire.
• Be sure to ground the outdoor unit.
• Incomplete grounding may lead to an electric shock.

CAUTION

• Use a circuit breaker of a type that is not tripped by shock waves.
• Incorrect/incomplete wiring will cause electrical fires or smoke.
• Prepare the power source for exclusive use with the air conditioner.
• This product can be connected to the main power.
• Fixed wire connections:
• A switch that disconnects all poles and has a contact separation of at least 3 mm must be incorporated into the fixed wiring.

Wire Connection

• The dash lines show on-site wiring.

For indoor unit RAS-M series

For indoor unit RAS-B series

• Connect the indoor/outdoor connecting cables to the identical terminal numbers on the terminal block of each unit.
• An incorrect connection may cause a failure.

1. Detach the front panel from the outdoor unit.
2. Remove the cord clamp.
3. Connect the wires for the power source and each indoor unit.
   • Connect the connecting cable to the terminal as identified by the matching numbers on the terminal block of the indoor and outdoor unit.
4. Fix the wiring connections for the power source and each indoor unit securely using a cord clamp.
5. Attach the front panel to the outdoor unit.

Stripping Length of connecting cable for outdoor unit

Terminal block (Connecting cable)

Grounding

This air conditioner must be grounded without fail.

• Grounding is necessary not only to safeguard against the possibility of receiving an electric shock but also to absorb both static, which is generated by high frequencies and held in the surface of the outdoor unit, and noise since the air conditioner incorporates a frequency conversion device (called an inverter) in the outdoor unit.
• If the air conditioner is not grounded, users may receive an electric shock if they touch the surface of the outdoor unit and that unit is charged with static.

Test run
Wiring/Piping Check

CAUTION
Electric current is applied to the control board. Beware of electric shock.

1. Detach the front panel of the outdoor unit.
   Do not remove the air discharge grille.

2. Turn on the circuit breaker to supply electricity.
   In the initial LED display status, D805 is lighted as below.
   ○: ON, ●: OFF, ⌾ : Rapid Flashing (5 times/sec.),
   ◇: Slow Flashing (1 time/sec.)D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   ●| ●| ●| ●| ●| ○

Start running all the indoor units connected to the outdoor unit in the cooling mode.
(The indoor unit in the room that doesn’t operate the cooling mode cannot be checked.)

3. After 5 minutes, hold down SW81 for at least 5 seconds, and check that
   D800 is lighted and D804 light is flashing (1 time/sec.).D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   ○| ●| ●| ●| ◇| ●
4. Press the SW81 4 times until the LED is displayed as below.
   D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   ●| ●| ○| ●| ⌾| ●
5. Press SW82 for 1 time. Then D805 light is fl ashing (5 times/sec.).
   D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   ●| ●| ○| ●| ⌾| ⌾
6. Hold down SW82 for at least 5 seconds. Then the wiring/piping check starts automatically. (The LED display is lighted for a moment.)
   D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   ●| ●| ○| ●| ◇| ○
   • If no problems are detected, the checking operation returns to the normal operation automatically. The LED is displayed as below.
     D800| D801| D802| D803| D804| D805
     ---|---|---|---|---|---
     ●| ●| ●| ●| ●| ○
7. The below is displayed when the error is detected. ( Repetition of 3 sec ON / 0.5 sec OFF)
   D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   ○| ○| ○| ○| ○| ○

Press the SW81 3 times until the LED is displayed as below, to check the room is judged as an error.

• Incorrect wiring/piping can be checked by pressing SW82. The LED is displayed as below. Turn off the circuit breaker, then check the wiring/piping again.
• ○: ON, ●: OFF, ⌾ : Rapid Flashing (5 times/sec.),
• ◇: Slow Flashing (1 time/sec.)

Service valve stays closed”

• The D800 LED represents unit A.
• The D801 LED represents unit B.
• The D802 LED represents unit C.
• The D803 LED represents unit D.
• The D804 LED represents unit E.

When you want to start over the operation of the SW81 and SW82, press the SW81 and the SW82 at the same time for 5 sec. (The procedure will set back to step 3.) However, do not execute the operation during the check. If by any chance the check is stopped by the operation, start over the check after turning off the power once.

Notes

• It sometimes takes about 30 minutes maximum for the check.
• During the check, the compressor and the fan of the outdoor/indoor unit repeat ON/OFF.
• You cannot check wiring/piping when the external temperature is 5°C or less. Also, there is a possibility to misjudge if the indoor temperature becomes too low by cooling operation. In that case, execute the cooling operation per room and check if the connection is normal.

Gas Leak Inspection
Refer to the “■ Gas Leak Inspection”.

Test run

1. If you perform the test run in summer, start running in the cooling mode first to decrease the temperature of the room, then run in the heating mode.
   (Heating mode: Set the temperature to 30°C.)

   • If you perform the test run in winter, start running in the heating mode first to increase the temperature of the room, then run in the cooling mode. (Cooling mode: Set the temperature to 17°C.)

2. For the test run, be sure to satisfy the following conditions below:

   • Perform the test run for each indoor unit respectively.
   • Perform the test run for about 10 minutes in both the cooling mode and the heating mode.
   • You can perform the test run in the cooling/heating mode by utilizing the thermo sensor of the indoor unit.
   • Cooling mode: Warm the thermo sensor using an appliance such as a hair dryer.
   • Heating mode: Put a cold towel on the thermo sensor.

Instructions for the Customers

• Explain to the customers the proper operation procedure and let them operate the air conditioner along with the supplied instruction manual.
• When multiple indoor units are connected to the outdoor unit, the cooling mode and the heating mode are not available at the same time.
• When multiple indoor units are running at the same time, the operation mode of the unit that starts running first is applied to the other units.
• When you start running the indoor unit or change the operation mode, the unit starts running after 3 minutes. This is due to the protection function of the unit, not a malfunction.
• When the external temperature becomes low, the pre-heating of the compressor starts to protect it. Keep the circuit breaker on for use.
• The electricity consumption during pre-heating is about 100 W.
• If the circuit breaker is turned off, the indoor unit may not start running for about 11 minutes.
• Electronic expansion valves are used for the outdoor unit.
• When you turn on the power, the outdoor unit starts clattering every 1 or 2 months. This clattering is not a malfunction but occurs when the unit is returning to the default setting for optimised control.
• While an indoor unit is running in the heating mode, the outdoor unit supplies refrigerant to the other indoor units that are not running.
• Therefore, noise may come from the other indoor units or the exterior of them may become warm.

Appendix

Work instructions
The existing R22 and R410A piping can be reused for inverter R32 product installations.

WARNING
Confi rming the existence of scratches or dents on the existing pipes and confi rming the reliability of the pipe strength are conventionally referred to the local site.
If the specifi ed conditions can be cleared, it is possible to update existing R22 and R410A pipes to those for R32 models.

Basic conditions needed to reuse existing pipes
Check and observe the presence of three conditions in the refrigerant piping works.

1. Dry (There is no moisture inside of the pipes.)
2. Clean (There is no dust inside of the pipes.)
3. Tight (There are no refrigerant leaks.)

Restrictions for use of existing pipes
In the following cases, the existing pipes should not be reused as they are. Clean the existing pipes or exchange them with new pipes.

1. When a scratch or dent is heavy, be sure to use new pipes for the refrigerant piping works.

2. When the existing pipe thickness is thinner than the specifi ed “Pipe diameter and thickness,” be sure to use new pipes for the refrigerant piping works.

   • The operating pressure of R32 is high (1.6 times that of R22). If there is a scratch or dent on the pipe or a thinner pipe is used, the pressure strength may be inadequate, which may cause the pipe to break in the worst case.
   • Pipe diameter and thickness (mm)
     Pipe outer diameter| Ø6.4| Ø9.5| Ø12.7
     ---|---|---|---
     Thickness| R32, R410A| 0.8| 0.8| 0.8
     R22

3. When the outdoor unit was left with the pipes disconnected, or the gas leaked from the pipes and the pipes were not repaired and refi lled.

   • There is the possibility of rain water or air, including moisture, entering the pipe.

4. When refrigerant cannot be recovered using a refrigerant recovery unit.

   • There is the possibility that a large quantity of dirty oil or moisture remains inside the pipes.

5. When a commercially available dryer is attached to the existing pipes.

   • There is the possibility that copper green rust has been generated.

6. When the existing air conditioner is removed after refrigerant has been recovered.
   Check if the oil is judged to be clearly different from normal oil.

   • The refrigerator oil is copper rust green in color:
     There is the possibility that moisture has mixed with the oil and rust has been generated inside the pipe.

   • There is discolored oil, a large quantity of residue, or a bad smell.

   • A large quantity of shiny metal dust or other wear residue can be seen in the refrigerant oil.

7. When the air conditioner has a history of the compressor failing and being replaced.

   • When discolored oil, a large quantity of residue, shiny metal dust, or other wear residue or mixture of foreign matter is observed, trouble will occur.

8. When temporary installation and removal of the air conditioner are repeated such as when leased etc.

9. If the type of refrigerator oil of the existing air conditioner is other than the following oil (Mineral oil), Suniso, Freol-S, MS (Synthetic oil), alkyl benzene (HAB, Barrel-freeze), ester series, PVE only of ether series.

   • The winding-insulation of the compressor may deteriorate.

10. When total pipe length is longer than the maximum length for total unit, specifi ed in clause 3, be sure to use new pipes for the refrigerant piping works.

NOTE
The above descriptions are results have been confi rmed by our company and represent our views on our air conditioners, but do not guarantee the use of the existing pipes of air conditioners that have adopted R32 in other companies.

Curing of pipes
When removing and opening the indoor or outdoor unit for a long time, cure the pipes as follows:

• Otherwise rust may be generated when moisture or foreign matter due to condensation enters the pipes.
• The rust cannot be removed by cleaning, and new pipes are necessary.

CONTACT

Toshiba Carrier (Thailand) Co., Ltd.

• 144 / 9 Moo 5, Bangkadi Industrial Park, Tivanon Road, Tambol Bangkadi, Amphur Muang, Pathumthani 12000, Thailand Scan QR CODE to access installation and owner’s manual on website.
• https://www.toshiba-carrier.co.th/manuals/default.aspx.
• Manual are available in AR/BG/CZ/DA/DE/EL/EN/ES/ET/FI/FR/HR/HU/IT/LT/LV/NL/NO/PL/PT/RO/RU/SK/SL/SV/UK.

References

• Toshiba Carrier | Manuals Download

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