TOSHIBA RAS-2M10G3AVG-E RAS Multi-split Inverter Outdoor Installation Guide
- June 12, 2024
- Toshiba
Table of Contents
TOSHIBA RAS-2M10G3AVG-E RAS Multi-split Inverter Outdoor
AIR CONDITIONER (MULTI-SPLIT TYPE)
Installation Manual – Outdoor Unit
| Model name: | RAS-2M10G3AVG-E RAS-2M14G3AVG-E |
|---|---|
| Refrigerant Type: | R32 |
| Language: | English |
Contents
- Precautions for safety
- Warning indications on the air conditioner unit
- Symbols and their meanings
- To disconnect the appliance from the main power supply
- New refrigerant air conditioner installation
- Requirement of report to the local power supplier
Detailed Product Information
The outdoor unit of the air conditioner is designed for multi-split type installations. The model name of the outdoor unit is RAS-2M10G3AVG-E RAS- 2M14G3AVG-E. It uses R32 refrigerant, which is a flammable refrigerant. The refrigerant type is indicated on the nameplate of the outdoor unit.
Product Usage Instructions
-
Precautions for safety:
Ensure that children do not play with the appliance. Cleaning and user maintenance should not be carried out by children without supervision. -
Warning indications on the air conditioner unit:
Read the OWNER’S MANUAL carefully before operation. Service personnel are required to read the OWNER’S MANUAL and INSTALLATION MANUAL before operation. For more information, refer to the OWNER’S MANUAL, INSTALLATION MANUAL, and similar documents. -
Symbols and their meanings:
Follow the precautions provided to avoid safety risks. The symbols indicate= the level of risk associated with incorrect use of the unit. They include DANGER (high possibility of severe injury or death), WARNING (may cause severe injury or death), and CAUTION (may cause personal injury or property damage). -
To disconnect the appliance from the main power supply:
This appliance must be connected to the main power supply using a circuit breaker or a switch with a contact separation of at least 3 mm in all poles. -
New refrigerant air conditioner installation:
This air conditioner uses the new HFC refrigerant (R32), which does not destroy the ozone layer. However, R32 refrigerant is susceptible to impurities such as water, oxidizing membranes, and oils due to its higher pressure compared to R22 refrigerant. -
Requirement of report to the local power supplier:
Before installation, make sure to report the installation of this appliance to the local power supplier. If there are any problems or if the installation is not accepted by the supplier, contact the service agency for appropriate measures.
AIR CONDITIONER (MULTI-SPLIT TYPE)
Installation Manual
Outdoor Unit
Model name:
RAS-2M10G3AVG-E RAS-2M14G3AVG-E
R32
Installation Manual Outdoor Unit
English
Outdoor Unit
Installation Manual
Contents
1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . 2 2 Installation / service
tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . 9 3 Speci¿cations. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . 9 4 Installation parts, accessories . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . 9 5 Installation of outdoor
unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . 10 6 Refrigerant piping . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7
Electrical work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8 Grounding . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . 13 9 Test run . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . 13 10 Pump-down Operation . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 11
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . 15 12 Appendix . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . 16
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.
1
Outdoor Unit
Installation Manual
1 Precautions for safety
The manufacturer shall not assume any liability for the damage caused by not
observing the description of this manual. Be sure to read this installation
manual carefully before installing. The supplied CD-ROM contains the
installation manual translated into many languages. Recommend to the owner to
perform maintenance periodically when using over long periods of time. This
appliance can be used by children aged from 8 years and above and persons with
reduced physical, sensory or mental capabilities or lack of experience and
knowledge if they have been given supervision or instruction concerning use of
the appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.
Warning indications on the air conditioner unit
WARNING (Risk of fire)
This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit. In case that refrigerant type is R32, this unit uses a flammable refrigerant. If refrigerant leaks and comes in contact with fire or heating part, it will create harmful gas and there is risk of fire.
Read the OWNER’S MANUAL carefully before operation.
Service personnel are required to carefully read the OWNER’S MANUAL and
INSTALLATION MANUAL before operation.
Further information is available in the OWNER’S MANUAL, INSTALLATION MANUAL,
and the like.
Warning indication
Description
CAUTION
BURST HAZARD
Open the service valves before the operation, otherwise there might be the
burst.
CAUTION
BURST HAZARD Open the service valves before the operation, otherwise there
might be the burst.
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Outdoor Unit
Installation Manual
Be sure to follow the precautions provided here to avoid safety risks. The symbols and their meanings are shown below.
DANGER WARNING
It indicates that incorrect use of this unit can result in a high possibility
of severe injury(*1) or death.
It indicates that incorrect use of this unit may cause severe injury or death.
CAUTION
It indicates that incorrect use of this unit may cause personal injury(2), or property damage(3).
1: A severe injury refers to blindness, injury, burns (hot or cold), electrical shock, bone fracture, or poisoning that leaves after effects and requires hospitalization or extended out-patient treatment.
2: Personal injury means a slight accident, burn, or electrical shock which does not require admission or repeated hospital treatment.
*3: Property damage means greater damage which affects assets or resources.
For general public use
Power supply cord of parts of appliance for outdoor use shall be at least
polychloroprene sheathed Àexible cord (design H07RN-F) or cord designation
60245 IEC66 (1.5 mm² or more). (Shall be installed in accordance with national
wiring regulations.) This appliance is not intended for use by person
(including children) with reduced physical, sensory or mental capabilities, or
lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for their
safety. Children should be supervised to ensure that they do not play with the
appliance.
CAUTION
To disconnect the appliance from the main power supply This appliance must be
connected to the main power supply by means of a circuit breaker or a switch
with a contact separation of at least 3 mm in all poles.
CAUTION
NEW REFRIGERANT AIR CONDITIONER INSTALLATION THIS AIR CONDITIONER USES THE NEW
HFC REFRIGERANT (R32), WHICH DOES NOT DESTROY THE OZONE LAYER. R32 REFRIGERANT
IS APT TO BE AFFECTED BY IMPURITIES SUCH AS WATER, OXIDIZING MEMBRANES, AND
OILS BECAUSE THE PRESSURE OF R32 REFRIGERANT IS APPROX. 1.6 TIMES OF
REFRIGERANT R22.
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Outdoor Unit
Installation Manual
CAUTION
AS WELL AS THE ADOPTION OF THIS NEW REFRIGERANT, REFRIGERATING MACHINE OIL HAS
ALSO BEEN CHANGED. THEREFORE, DURING INSTALLATION WORK, BE SURE THAT WATER,
DUST, FORMER REFRIGERANT, OR REFRIGERATING MACHINE OIL DOES NOT ENTER THE
REFRIGERATION CYCLE OF A NEWREFRIGERANT AIR CONDITIONER. TO AVOID MIXING
REFRIGERANT AND REFRIGERATING MACHINE OIL, THE SIZES OF CHARGING PORT
CONNECTING SECTIONS ON THE MAIN UNIT ARE DIFFERENT FROM THOSE FOR THE
CONVENTIONAL REFRIGERANT, AND DIFFERENT SIZE TOOLS ARE ALSO REQUIRED. FOR
CONNECTING PIPES, USE NEW AND CLEAN PIPING MATERIALS WITH HIGH PRESSURE
WITHSTAND CAPABILITIES, DESIGNED FOR R32 ONLY, AND ENSURE THAT WATER OR DUST
DOES NOT ENTER. MOREOVER, DO NOT USE ANY EXISTING PIPING AS ITS PRESSURE
WITHSTAND MAY BE INSUFFICIENT AND MAY CONTAIN IMPURITIES.
DANGER
· THE MANUFACTURER SHALL NOT ASSUME ANY LIABILITY FOR THE DAMAGE CAUSED BY NOT
OBSERVING THE DESCRIPTION OF THIS MANUAL.
· FOR USE BY QUALIFIED PERSONS ONLY. · MEANS FOR DISCONNECTION FROM THE SUPPLY
HAVING A CONTACT
SEPARATION OF AT LEAST 3 MM IN ALL POLES MUST BE INCORPORATED IN THE FIXED
WIRING. · TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK.
MAKE SURE ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC
SHOCK. · CONNECT THE CONNECTING CABLES CORRECTLY. IF THE CONNECTING CABLES ARE
CONNECTED WRONGLY, ELECTRIC PARTS MAY BE DAMAGED. · CHECK THE EARTH WIRE THAT
IT IS NOT BROKEN OR DISCONNECTED BEFORE INSTALLATION. · DO NOT INSTALL NEAR
CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS
INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION. · TO PREVENT OVERHEATING THE
INDOOR UNIT AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY (MORE THAN 2
M) FROM HEAT SOURCES SUCH AS RADIATORS, HEATERS, FURNACE, STOVES, ETC. · WHEN
MOVING THE AIR CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY
CAREFUL NOT TO GET THE SPECIFIED REFRIGERANT (R32) WITH ANY OTHER GASEOUS BODY
INTO THE REFRIGERATION CYCLE. IF AIR OR ANY OTHER GAS IS MIXED IN THE
REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CYCLE BECOMES ABNORMALLY
HIGH AND IT RESULTANTLY CAUSES BURST OF THE PIPE AND INJURIES ON PERSONS.
4
Outdoor Unit
Installation Manual
DANGER
· IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE
INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT
GAS IS HEATED BY FIRE OR SOMETHING ELSE, IT CAUSES GENERATION OF POISONOUS
GAS.
· WHEN INSTALLING OR RE-INSTALLING THE AIR CONDITIONER, DO NOT INJECT AIR OR
OTHER SUBSTANCES BESIDES THE DESIGNATED REFRIGERANT “R32” INTO THE
REFRIGERATING CYCLE. IF AIR OR OTHER SUBSTANCES ARE MIXED, AN ABNORMAL
PRESSURE CAN OCCUR IN THE REFRIGERATING CYCLE, AND THIS CAN CAUSE AN INJURY
DUE TO A PIPE RUPTURE.
WARNING
About the refrigerant · This product contains Àuorinated greenhouse gases. ·
Do not vent gases to the atmosphere. · The appliance shall be stored in a room
without continuously operating ignition sources
(for example: open Àames, an operating gas appliance or an operating electric
heater). · Do not pierce or burn refrigerant cycle parts. · Do not use means
to accelerate the defrosting process or to clean, other than those
recommended by the manufacturer. · Be aware that refrigerants may not contain
an odour. · The refrigerant inside the unit is Àammable. If the refrigerant
leaks in the room and comes
in contact with ¿re from a burner, a heater, or a cooker, it may result in ¿re
or the formation of a harmful gas. · Turn off any combustible heating devices,
ventilate the room, and contact the dealer from which you purchased the unit.
· Do not use the unit until a service person con¿rms that the portion from
which the refrigerant leaked is repaired. · When installing, relocating, or
servicing the air conditioner, use only the speci¿ed refrigerant (R32) to
charge the refrigerant lines. Do not mix it with any other refrigerant and do
not allow air to remain in the lines. · Pipe-work shall be protected from
physical damage. · Compliance with national gas regulations shall be observed.
WARNING
· Do not use any refrigerant different from the one speci¿ed for complement or
replacement. Otherwise, abnormally high pressure may be generated in the
refrigeration cycle, which may result in a failure or explosion of the product
or an injury to your body.
· Installation work must be requested from the supplying retail dealership or
professional vendors. Self-installation may cause water leakage, electrical
shock, or ¿re as a result of improper installation.
5
Outdoor Unit
Installation Manual
WARNING
· Speci¿ed tools and pipe parts for model R32 are required, and installation
work must be done in accordance with the manual. HFC type refrigerant R32 has
1.6 Times more pressure than that of conventional refrigerant (R22). Use the
speci¿ed pipe parts, and ensure correct installation, otherwise damage and/or
injury may be caused. At the same time, water leakage, electrical shock, and
¿re may occur.
· Be sure to install the unit in a place which can suf¿ciently bear its
weight. If the load bearing of the unit is not enough, or installation of the
unit is improper, the unit may fall and result in injury.
· Electrical work must be performed by a quali¿ed electrical engineer in
accordance with the code governing such installation work, internal wiring
regulations, and the manual. A dedicated circuit and the rated voltage must be
used. Insuf¿cient power supply or improper installation may cause electrical
shock or ¿re.
· Use a cabtyre cable to connect wires in the indoor/outdoor units. Midway
connection, stranded wire, and single-wire connections are not allowed.
Improper connection or ¿xing may cause a ¿re.
· Wiring between the indoor unit and outdoor units must be well shaped so that
the cover can be ¿rmly placed. Improper cover installation may cause increased
heat, ¿re, or electrical shock at the terminal area.
· Be sure to use only approved accessories or the speci¿ed parts. Failure to
do so may cause the unit to fall, water leakage, ¿re or electrical shock.
· After the installation work, ensure that there is no leakage of refrigerant
gas. If the refrigerant gas leaks out of the pipe into the room and is heated
by ¿re or something else from a fan heater, stove or gas range, it causes
generation of poisonous gas.
· Make sure the equipment is properly earthed. Do not connect the earth wire
to a gas pipe, water pipe, lightning conductor, or telephone earth wire.
Improper earth work may be the cause of electrical shock.
· Do not install the unit where Àammable gas may leak. If there is any gas
leakage or accumulation around the unit, it can cause a ¿re.
· Do not select a location for installation where there may be excessive water
or humidity, such as a bathroom. Deterioration of insulation may cause
electrical shock or ¿re.
WARNING
· Installation work must be performed following the instructions in this
installation manual. Improper installation may cause water leakage, electrical
shock or ¿re. Check the following items before operating the unit. – Be sure
that the pipe connection is well placed and there are no leaks. – Check that
the service valve is open. If the service valve is closed, it may cause
overpressure and result in compressor damage. At the same time, if there is a
leak in the connection part, it may cause air suction and overpressure,
resulting in burst or injury.
6
Outdoor Unit
Installation Manual
WARNING
· The installation of pipe work shall be kept to a minimum. · 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. · Do not modify the power cable, connect the cable midway, or
use a multiple outlet extension cable. Doing so may cause contact failure,
insulation failure, or excess current, resulting in ¿re or electrical shock. ·
If you detect any damage, do not install the unit. Contact your supplying
dealer immediately. · Never modify this unit by removing any of the safety
guards or bypassing any of the safety interlock switches. · Do not wash air
conditioners with pressure washers. Electric leaks may cause electric shocks
or ¿res. · 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.) · When installing the air conditioner in a small room, provide
appropriate measures to ensure that the concentration of refrigerant leakage
occur in the room does not exceed the critical level. It is not dangerous
refrigerant; it has not toxicity. However, a concentration above 0.3 kg/m³ as
criterion still causes suffocation. The volume of refrigerant charged to the
multi system air conditioner is more than the volume charged to a conventional
individual system. · Before operating the air conditioner after having
completed the work, check that the electrical parts control box cover of the
indoor unit and valve cover of the outdoor unit are closed, and set the
circuit breaker to the ON position. You may receive an electric shock etc. if
the power is turned on without ¿rst conducting these checks. · Make sure drain
hose insulation if cooling operation is used at sub-zero ambient temperature.
WARNING
· After installation work, make sure below before operation. – Connection
pipes are connected properly and no leakage. – Packed valves are fully open.
Running compressor without open packed valves may cause abnormal high pressure
and parts failure. Leakage at connection piping may suck air and make further
high pressure cause burst and injure.
· During pump down work make sure below process. – Don’t mix air into the
refrigerant cycle. – Stop the compressor before removing piping after packed
valves are fully closed. Removing piping under the compressor running and
packed valves open, air might be sucked and refrigeration cycle pressure
becomes abnormally high, and it causes burst or injury on persons.
7
Outdoor Unit
Installation Manual
CAUTION
· Please read this installation manual carefully before installing the unit.
It contains further important instructions for proper installation.
· Exposure of unit to water or other moisture before installation could result
in electric shock. Do not store it in a wet basement or expose to rain or
water.
· After unpacking the unit, examine it carefully for possible damage. · Do not
install in a place that can increase the vibration of the unit. Do not install
in a place
that can amplify the noise level of the unit or where noise and discharged air
might disturb neighbours. · This appliance must be connected to the main power
supply by means of a circuit breaker depending on the place where the unit is
installed. Failure to do so may cause electrical shock. · Follow the
instructions in this installation manual to arrange the drain pipe for proper
drainage from the unit. Ensure that drained water is discharged. Improper
drainage can result in water leakage, causing water damage to furniture. ·
Tighten the Àare nut with a torque wrench using the prescribed method. Do not
apply excess torque. Otherwise, the nut may crack after a long period of usage
and it may cause the leakage of refrigerant. · Wear gloves (heavy gloves such
as cotton gloves) for installation work. Failure to do so may cause personal
injury when handling parts with sharp edges. · Do not touch the air intake
section or the aluminium ¿ns of the outdoor unit. It may cause injury. · Do
not install the outdoor unit in a place which can be a nest for small animals.
Small animals could enter and contact internal electrical parts, causing a
failure or ¿re. · Request the user to keep the place around the unit tidy and
clean. · Make sure to conduct a test run after the installation work, and
explain how to use and maintain the unit to the customer in accordance with
the manual. Ask the customer to keep the operation manual along with the
installation manual. · Do not climb onto or place objects on top of the
outdoor unit. You may fall or the objects may fall off of the outdoor unit and
result in injury.
Requirement of report to the local power supplier
Please make absolutely sure that the installation of this appliance is
reported to the local power supplier before installation. If you experience
any problems or if the installation is not accepted by the supplier, the
service agency will take adequate countermeasures.
Important information regarding the refrigerant used This product contains
Àuorinated greenhouse gases. Do not vent gases into the atmosphere.
Refrigerant type: R32 GWP(1) value: 675 (ex. R32 ref. AR4) (1)GWP = global
warming potential The refrigerant quantity is indicated on the unit name
plate. This value is based on F gas regulation 517/2014
8
Outdoor Unit
Installation Manual
2 Installation / service tools
Changes in the product and components In air conditioners using R32, in order
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, flare processing diameter and opposing flare nuts
sizes have been changed.
(for copper pipes with nominal dimensions 1/2 and 5/8)
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
3 Specifications
Operating conditions*1 Connecting pipe length
Cooling operation
Dry operation
Heating operation
Minimum for 1 unit
(m)
Maximum for 1 unit
(m)
Maximum for total unit
(m)
Height difference
(m)
No additional refrigerant charge (m)
RAS-2M10G3AVG-E
2 15 20 10 20
10 to 46 °C 10 to 46 °C 20 to 24 °C
RAS-2M14G3AVG-E
2 20 30 10 30
The specifications for performance of this air conditioner differs depending on the combination of the indoor units which are operated. *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-B10J2KVSG-E is abbreviated as “10”.
Indoor unit class
Unit B Unit A
Total
05 or 07 or 10 or 13 05 or 07 or 10 or 13 20 (RAS-2M10G3AVG-E) 26 (RAS- 2M14G3AVG-E)
RAS-2M10G3AVG-E 6.35, 9.52 mm 6.35, 9.52 mm
Standard connecting pipe diameter
RAS-2M14G3AVG-E 6.35, 9.52 mm 6.35, 9.52 mm
—
4 Installation parts, accessories
Installation parts *Locally procured
Parts name Refrigerant piping*2 Putty, PVC tapes
Indoor unit (abbreviation)
05, 07, 10, 13
Specifications Liquid side (O.D.) 6.35 mm —
Gas side (O.D.) 9.52 mm
Q’ty 1 ea. 1 ea.
*2 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 manual
1
Product specifi cation
1
Rubber cap (Water-proof)
2
CD-ROM
(Installation
1
manual)
F-GAS label
1
Drain nipple
1
9
Outdoor Unit
Installation Manual
600 mm or more 340 mm 320 mm 86 mm 102 mm
5 Installation of outdoor unit
Installation Location
A place which 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 which is not exposed to strong wind. A place free of combustible gas.
A place which 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 saline-rich atmosphere such as a coastal area. A
place with high level of sulfide 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 period of 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 wind shield.
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 wind shield 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%.
100 mm or more
100 mm or more
Draining Off the Water from the Outdoor Unit
Install 2 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.
Water-proofing rubber cap Drain nipple
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.
Snow protection plate
Front
Snow protection hood
Anchor bolts
At least 500 mm Snow accumulation line
Holding frame
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.
108 mm 28 mm
125 mm Air inlet
15 mm or less
Mounting leg
Air outlet 600 mm
90 mm
Drain outlet
GOOD
BAD
Absorb vibration
with vibration-proof
rubber pads
If only the end of
the mounting leg
is supported, it
may deform.
Do not support the outdoor unit only with the mounting leg.
Foundation
Bottom plate of outdoor unit
Foundation
600 mm or more
600 mm or more
Foundation
Support the bottom surface of the mounting leg that is in contact with and
underneath the bottom plate of the outdoor unit.
10
Outdoor Unit
Installation Manual
6 Refrigerant piping
CAUTION Install in rooms that are 5 m3 or larger. If a leak of refrigerant gas
occurs inside the room, an oxygen deficiency may occur.
Detaching the Valve cover
Remove the 3 screws. Pull the valve cover in the direction of the arrow, and
remove it.
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.
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 period of 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
Valve cover
Refrigerant Piping Connection
Flaring 1. Cut the pipe with a pipe cutter.
90°
Obliquity
Roughness Warp
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)
A
B
Die
Pipe
Pipe
A
B
Outside diameter
Thickness
Rigid Imperial (clutch (wing type) nut type) R32 tool R32 tool
mm
mm
mm
mm mm
6.35
0.8
0 to 0.5
1.5 to 2.0
9.1
9.52
0.8
0 to 0.5
1.5 to 2.0
13.2
Flare Nut
Width across Tighten torque
flat
mm Nm kgfm
17
14 to 1.4 to 18 1.8
22
33 to 3.3 to 42 4.2
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
flare processing part will cause refrigerant gas leak.
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
From the sake of environmental protection, use a vacuum pump to extract the
air during installation. * Prepare a 4 mm hexagon wrench. 1. Connect a charge
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, 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 nut of the at the gas end a little to make sure
that air is taken in, then tighten the nut. If you find air is not taken in,
make sure that the charge hose is connected to the port(s) securely. Perform
extraction for about 15 or more minutes and make sure that the compound
pressure gauge reading is 101 kPa (76 cmHg). If the compound pressure gauge
reading is not 101 kPa (76 cmHg), 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 cmHg). You need not add refrigerant.
11
Outdoor Unit
Installation Manual
4. Disconnect the charge hose from the service port, then open the valve stem fully using a 4 mm hexagon wrench.
Hexagon wrench is required.
Service port cap
4 mm
Valve stem cap 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.
Service valve
Type
mm
Liquid side 6.35
Gas side
9.52
Tighten torque
Valve stem cap
Service port cap
1m
kgfm
1m
kgfm
14 to 18 1.4 to 1.8
—
—
14 to 18 1.4 to 1.8 14 to 18 1.4 to 1.8
Compound pressure gauge 101 kPa (76 cmHg)
Handle Low Charge hose
Service valve at the liquid side
Service valve at the gas side
Service port (Valve core (Setting pin))
Pressure gauge Handle High (Keep full closed) Manifold valve Charge hose
Vacuum pump adapter for preventation
Vacuum pump
Insulation of the Refrigerant Pipes
Insulate the refrigerant pipes for liquid and gas separately.
Heat-proof bubble polyethylene
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.
7 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 connection are secure, use designated cables.
Fix the cables securely so that no external force applied to the cables may
effect 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
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.
Flare nut connections (Indoor unit)
Service port cap connection Valve stem cap connection
- Check point example
Flare nut connections (Outdoor unit)
12
Outdoor Unit
Installation Manual
Wire Connection
The dash lines show on-site wiring. For indoor unit RAS-M series.
(Main circuit)
(System interconnection wires)
Input power
L
1
N
2
3
2
3
Remote controller
Leakage breaker
Earth
Indoor unit
For indoor unit RAS-B series.
Input power
(Main circuit)
L N
Leakage breaker
Earth
(System interconnection wires)
2
2
3
3
Remote controller
Indoor unit
Connect the indoor/outdoor connecting cables to the identical terminal numbers
on the terminal block of each unit.
Incorrect connection may cause a failure.
Model
Power supply Maximum running current Circuit breaker rating
Power cord
Connecting cable
RAS-2M10G3AVG-E
RAS-2M14G3AVG-E
1ph, 50Hz, 220-240V
9.50A
10.50A
15A
H07RN-F or 60245 IEC 66 3-core 1.5 mm²
H07RN-F or 60245 IEC 66 4-core 0.75 mm²
1. Remove the valve cover screws. 2. Pull the valve cover in the direction of arrow, and remove it. 3. Remove the cord clamp.
Valve cover
Stripping Length of connecting cable for outdoor unit
1(L) 2 3
LN
5
5
5
55
30
30
5 55
Earth wire
Connecting cable
Power cord
Earth wire (Unit : mm)
Power supply
Earth screw Connecting cable
Unit A
Earth screw
Connecting cable Unit B
8 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.
9 Test run
Wiring/Piping Check
CAUTION
Electric current is applied on the control board. Beware of electric shock.
1. Remove the cabinet (up) screws. 2. Pull the cabinet (up) in the direction
of arrow, and remove it.
Cord clamp
4. 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 the outdoor unit.
5. Fix the wiring connections for the power source and each indoor unit
securely using a cord clamp.
6. Attach the terminal cover.
Valve cover
LED Service switches
D801 D803 D805
SW02
D800 D802 D804
SW01
13
Outdoor Unit
Installation Manual
3. Turn on the circuit breaker to supply electricity. In the initial LED display status, D805 is lighted as below.
{ : ON, z : OFF, : Rapid Flashing (5 times/sec.), : Slow Flashing (1 time/sec.)
D800 z
D801 z
D802 z
D803 z
D804 z
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.)
4. After 5 minutes, hold down SW01 for at least 5 seconds, and check that D800 is lighted and D804 light is flashing (1 time/sec.).
D800 {
D801 z
D802 z
D803 z
D804
D805 z
5. Press the SW01 4 times until the LED is displayed as below.
D800 z
D801 z
D802 {
D803 z
D804
D805 z
6. Press SW02 for 1 times. Then D805 light is flashing (5 times/sec.).
D800 z
D801 z
D802 {
D803 z
D804
D805
7. Hold down SW02 for at least 5 seconds. Then the wiring/piping check starts automatically. (The LED display is lighted for a moment.)
D800 z
D801 z
D802 {
D803 z
D804
D805 {
If no problems are detected, the checking operation returns to the normal operation automatically. The LED is displayed as below.
D800 z
D801 z
D802 z
D803 z
D804 z
D805 {
8. 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 SW01 3 times until the LED is displayed as below, to check the room judged as error.
D800 z
D801 {
D802 z
D803 z
D804 z
D805
Incorrect wiring/piping can be checked by pressing SW02. The LED is displayed as below. Turn off the circuit breaker, then check wiring/piping again.
Check result
D800 z { z {
D801 z z { {
D802 z z z z
D803 z z z z
D804 z z z z
D805
Description Normal operation (no error) Trouble in unit A Trouble in unit B Trouble in unit A and B
The D800 LED represents unit A. The D801 LED represents unit B.
9. When you want to start over the operation of the SW01 and SW02, press the
SW01 and the SW02 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.
10. 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 for per room and check if the connection is normal.
Gas Leak Inspection
Refer to the ” Gas Leak Inspection” on page 12.
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 which
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 30 W. If the circuit breaker is turned
off, the indoor unit may not start running for about 10 minutes or more.
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 which are not running. Therefore, noise
may come from the other indoor units or the exterior of them may become warm.
14
Outdoor Unit
Installation Manual
10 Pump-down Operation
Pump-down Operation (Recovering refrigerant)
CAUTION
Since the forcible running for collecting refrigerant stops automatically
after 10 minutes, finish 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 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. Remove the cabinet (up) screws. 2. Pull the cabinet (up) in the direction
of arrow, and remove it.
Valve cover
LED Service switches
D801 D803 D805
SW02
D800 D802 D804
SW01
3. Turn on the circuit breaker to supply electricity. In the initial LED display status, D805 is lighted as below.
{ : ON, z : OFF, : Rapid Flashing (5 times/sec.), : Slow Flashing (1 time/sec.)
D800 z
D801 z
D802 z
D803 z
D804 z
D805 {
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 units.
4. Hold down SW01 for at least 5 seconds, and check that D800 is lighted and D804 light is flashing (1 time/sec.).
D800 {
D801 z
D802 z
D803 z
D804
D805 z
5. Press SW01 for 1 time. Then D804 light is flashing (5 times/sec.).
D800 {
D801 z
D802 z
D803 z
D804
D805 z
6. Press SW02 for 1 time. Then D805 light is flashing (5 times/sec.).
D800 {
D801 z
D802 z
D803 z
D804
D805
7. Hold down SW02 for at least 5 seconds. Then outdoor unit start cooling mode. (The display is kept during the refrigerants collection operation.)
D800 {
D801 z
D802 z
D803 z
D804
D805 {
8. Close the valve stem of the service valve at the liquid end. 9. Make sure
that the compound pressure gauge reading is 101 kPa
(76 cmHg) 10. Close the valve stem of the service valve at the gas end. 11.
The refrigerants collection operation is finished in maximum 10 minutes.
After the collection is finished, promptly stop the operation of all the
indoor unit. (There are cases that the compressor restarts.) 12. When you want
to start over the operation of the SW01 and SW02, press the SW01 and SW02 at
the same time for 5 sec. (It back to the initial condition of 3.) However, do
not execute the operation during the refrigerants collection. If by any chance
the collection is stopped by the operation, start over the refrigerants
collection operation.
11 Troubleshooting
You can perform fault diagnosis of the outdoor unit with the LEDs on the P.C.
board of the outdoor unit in addition to using the check codes displayed on
the remote controller of the indoor unit. Use the LEDs and check codes for
various checks. Details of the check codes displayed on the remote controller
of the indoor unit are described in the Installation Manual of the indoor
unit.
LED displays and check codes { : ON ({* : 3 sec ON/0.5 sec OFF), z : OFF
Display D800 D801 D802 D803 D804 D805 (YL) (YL) (YL) (YL) (YL) (GN)
zzzzz { z z z z z { z z z { { z z z z z { z z { z { z z z { { z z {
{ { z z z z z { z { z z { z z { z { z { { z { z
z z { { z
{ z { { z {
z { { { z
{ { { { z
z z z z {
{ z z z {
z { z z {
{ z { z { z { { z { z z z { { { z z { { z { z { { { z { { {*
Indoor check code
1C 21 1C 1D 1F 14 16 17 1C 1A 1E
19
1B
18
18
1C
1C
1C
20 20 20 –
Description
Normal operation (no error) Compressor case thermostat error High pressure
switch error Compressor system error Compressor lock Compressor breakdown
Driving element short circuit Position detection circuit error Current
detection circuit error Communication error between MCU Fan system error
Discharge temperature error Discharge temperature sensor (TD) error Outdoor
air temperature sensor (TO) error Suction temperature sensor (TS) error Heat
exchanger temperature sensor (TE) error Gas pipe (unit A) temperature sensor
(TGa) error Gas pipe (unit B) temperature sensor (TGb) error Gas pipe (unit C)
temperature sensor (TGc) error PMV error (SH20) PMV error (SH8) PMV leakage
error (unit A) PMV leakage error (unit B) PMV leakage error (unit C) Miswiring
(mispiping) check error
15
16
12 Appendix
Work instructions
The existing R22 and R410A piping can be reused for inverter R32 product
installations.
WARNING
Con¿rming the existence of scratches or dents on the existing pipes and
con¿rming the reliability of the pipe strength are conventionally referred to
the local site. If the speci¿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
speci¿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
R32, R410A
Thickness
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 re¿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,
speci¿ed in clause 3, be sure to use new pipes for the refrigerant piping
works.
NOTE
The above descriptions are results have been con¿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.
Placement location
Outdoors
Indoors
Term
1 month or more Less than 1 month
Every time
Curing manner Pinching
Pinching or taping
YES Are there scratches or dents on the existing pipes?
NO NO
Is it possible to operate the existing air conditioner?
Existing pipes: Cannot be used. · Use new pipes.
YES
· After the existing air conditioner is operated in cooling mode for approx.
30 minutes or longer,* recover the refrigerant.
· For cleaning the pipes and recovering oil · Refrigerant recovery: Pump down
method
Nitrogen gas pressure 0.5 MPa
· Remove the existing air conditioner from the piping and carry out Àushing
(nitrogen pressure 0.5 MPa) to remove any remains inside of the pipe.
Was largely discolored oil or a large quantity of remains discharged? (When
the oil
deteriorates, the color of the oil changes to a muddy or black color.) NO
Connect the indoor / outdoor units to the existing pipe. · Use a Àare nut
attached to the main unit for the
indoor / outdoor units. (Do not use the Àare nut of the existing pipe.) · Re-
machine the Àare machining size to size for R32.
· (Airtight test), Vacuum dry, Refrigerant charge, Gas leak check
Test run
(If there is discharge of remains, it is judged that a large quantity of
remains are present.)
YES Clean the pipes or use new pipes.
Piping necessary to change the Àare nut / machining size due to pipe compression
- Flare nut width: H
Copper pipe outer diameter
Ø6.4
Ø9.5
For R32, R410A
17
22
H
For R22
Same as above
(mm) Ø12.7
26 24
- Flare machining size: A
A
Copper pipe outer diameter
Ø6.4
Ø9.5
For R32, R410A 9.1
13.2
For R22
9.0
13.0
Becomes a little larger for R32
(mm) Ø12.7 16.6 16.2
Do not apply refrigerator oil to the Àare surface.
Installation Manual
Outdoor Unit
144 / 9 Moo 5, Bangkadi Industrial Park, Tivanon Road, Tambol Bangkadi, Amphur
Muang, Pathumthani 12000, Thailand
1116491099
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