38VYX050/38VYX080
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INSTALLATION MANUAL
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38VYX050/38VYX080
General information
• Perform installation work properly according to the Installation
Manual.
Inappropriate installation may result in water leakage, electric
shock or fire.
• When the air conditioner is installed in a small room, provide
appropriate measures to ensure that the concentration of
refrigerant leakage occurred in the room does not exceed the
critical level.
• Install the air conditioner securely in a location where the base
can sustain the weight adequately.
• Perform the specified installation work to guard against an
earthquake.
If the air conditioner is not installed correctly, accidents may occur
due to the falling unit.
• If refrigerant gas has leaked during the installation work, ventilate
the room immediately.
Precautions for safety
The unit must be installed according to the national plant-
engineering standards.
• Read this “PRECAUTIONS FOR SAFETY” carefully before
Installation.
• The precautions described below include the important items
regarding safety. Observe them without fail.
• After the installation work, perform a trial operation to check for
any problem.
Follow the Owner’s Manual to explain how to use and maintain the
unit to the customer.
• Turn off the main power supply switch (or breaker) before the unit
maintenance.
• Ask the customer to keep the Installation Manual together with the
Owner’s Manual.
If the leaked refrigerant gas comes in contact with fire, noxious
gas may generate.
CAUTION:
• This air conditioner adopts the new HFC refrigerant (R410A)
which does not destroy ozone layer.
The characteristics of R410A refrigerant are ; easy to absorb
water, oxidizing membrane or oil, and its pressure is approx. 1.6
times higher than that of refrigerant R22.
Accompanied with the new refrigerant, refrigerating oil has also
been changed.
Therefore, during installation work, be sure that water, dust,
former refrigerant, or refrigerating oil does not enter the
refrigerating cycle.
• After the installation work, confirm that refrigerant gas does not
leak. If refrigerant gas leaks into the room and flows near a fire
source, such as a cooking range, noxious gas might generate.
• Electrical work must be performed by a qualified electrician in
accordance with the Installation Manual.
Make sure the air conditioner uses an exclusive power supply. An
insufficient power supply capacity or inappropriate installation may
cause fire.
• Use the specified cables for wiring and connect them firmly to
the terminals.
To prevent charging an incorrect refrigerant and refrigerating oil,
the sizes of connecting sections of charging port of the main unit
and installation tools are charged from those for the conventional
refrigerant. Accordingly the exclusive tools are required for the
new refrigerant (R410A).
To prevent external forces applied to the terminals from affecting
the terminals.
• Be sure to provide grounding. Do not connect ground wires to gas
pipes, water pipes, lightning rods or ground wires for telephone
cables.
• Connect indoor and outdoor units with field-supplied copper pipes
by means of flare connections. Use insulated seamless
refrigeration grade pipe only, (Cu DHP type according to
ISO1337), degreased and deoxidized, suitable for operating
pressures of at least 4200 kPa and for burst pressure of at least
20700 kPa. Under no circumstances must sanitary type copper
pipe be used.
• Conform to the regulations of the local electric company when
wiring the power supply.
Inappropriate grounding may cause electric shock.
• Do not install the air conditioner in a location subject to a risk of
exposure to a combustible gas.
If a combustible gas leaks, and stays around the unit, a fire may
occur.
Moreover, do not use the existing piping because there are
problems with pressure-resistance force and impurity in it.
• Check that the impedance of the mains power supply is in
conformance with the unit power input indicated in the
electric data (EN 61000-3-11).
Required tools for installation work
• This unit complies with low-voltage (EEC/73/23) and electro-
magnetic compatibility (EEC/89/336) directives.
• This appliance must be connected to the main power supply by
means of a switch with a contact separation of at least 3 mm.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Philips screw driver
Cutter drill (65 mm)
Spanner
Pipe cutter
Cutter
Reamer
Gas leak detector
Meter
Thermometer
Volt-ohm-milliammeter
Electro circuit tester
Hexagonal wrench
Flare tool
The installation fuse (25A D type
) must be used for
the power supply line of this conditioner.
WARNING:
• Ask an authorized dealer or qualified installation professional to
install/maintain the air conditioner. Inappropriate installation may
result in water leakage, electric shock or fire.
• Turn off the main power supply switch or breaker before attempting
any electrical work. Make sure all power switches are off. Failure
to do so may cause electric shock.
• Connect the connecting cable correctly. If the connecting cable is
connected in a wrong way, electric parts may be damaged.
• When moving the air conditioner for the installation into another
place, be very careful not to enter any gaseous matter other than
the specified refrigerant into the refrigeration cycle.
Pipe bender
Water level
Metal saw
R410A (Special requirement)
If air or any other gas is mixed in the refrigerant, the gas pressure
in the refrigeration cycle becomes abnormally high and it may
cause pipe burst and injuries on persons.
• Do not modify this unit by removing any of the safety guards or by
by-passing any of the safety interlock switches.
• Exposure of unit to water or other moisture before installation may
cause a short-circuit of electrical parts. Do not store it in a wet
basement or expose to rain or water.
-
-
-
Manometer for pressure measuring
(Charge hose : R410A special requirement)
Vacuum pump
(Charge hose : R410A special requirement)
Torque wrench:
• 1/4 (17 mm) 16 N•m (1,6 kgf•m)
• 3/8 (22 mm) 42 N•m (4,2 kgf•m)
• 1/2 (26 mm) 55 N•m (5,5 kgf•m)
• 5/8 (15,9 mm) 120 N•m (12,0 kgf•m)
Copper pipe gauge adjusting projection margin
Vacuum pump adapter
• After unpacking the unit, examine it carefully for possible damage
.
• Do not install in a place that might increase the vibration of the unit.
• To avoid personal injury (with sharp edges), be careful when
handling parts.
-
-
GB - 2
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38VYX050/38VYX080
Accessory and refrigerant
E N G L I S H
Table II: Accessory and Installation Parts
Outdoor unit
Protective bush
Installation manual x 1
(For SM800AT only)
Drain nipple
Guard material for passage
part (For SM800AT only)
Waterproof rubber cap
Use copper pipe with 1.0 mm or more thickness for Ø 15.87.
• Flare nut and flare works are also different from those of the
conventional refrigerant.
Take out the flare nut attached to the main unit of the air
conditioner, and use it.
Refrigerant Piping
• Piping kit used for the conventional refrigerant cannot be used.
• Use copper pipe with 0.8 mm or more thickness for Ø 6.4, Ø 9.52,
Ø 12.7.
Table III: Length of refrigerant
Length of refrigerant pipe connected
to indoor/outdoor units.
Refrigerant addition
.
20 m o shorter: for all units
Do not add refrigerant at installation site
(1)
from 20 m to 30 m (38VYX 050)
Add 20 g of refrigerant for every meter of pipe beyond 20 m
Add 40 g of refrigerant for every meter of pipe beyond 20 m
(2)
from 20 m to 50 m (38VYX 080)
NOTES: Caution at addition of refrigerant
(1)
When the total length of refrigerant pipe exceeds 20m, add 20g/m. The pipe total maximum length is 30 m. (Max. amount of additional refrigerant is 200g.).
Charge the refrigerant accurately. Overcharge may cause a serious trouble of compressor.
When the total length of refrigerant pipe exceeds 20m, add 40g/m. The pipe total maximum length is 50 m. (Max. amount of additional refrigerant is
(2)
1200g.). Charge the refrigerant accurately. Overcharge may cause a serious trouble of compressor.
Table IV: Operating limits (1)
Cooling (2)
outdoor temperature 43°C
Maximum conditions
Minimum conditions
indoor temperature 32°C d.b.; 23°C w.b.
outdoor temperature -5°C
indoor temperature 21°C d.b.; 15°C w.b.
outdoor temperature 24°C d.b.; 18°C w.b.
indoor temperature 27°C d.b.
Heating (2)
Maximum conditions
Minimum conditions
outdoor temperature –15°C d.b.
Mains power supply
Nominal single-phase voltage
Operating voltage limits
220÷240V ~ 50Hz
min. 198V – max. 264V
Notes: 1. Data referred to the outdoor unit only.
WARNING:
2. According to prEN14511.
During heat pump operation unit will undergo several defrost cycles to
eliminate ice that might possibly collect on the outdoor unit in very low
ambient temperatures.
In these cycles, fan speed will automatically reduce and cannot be
varied until defrost cycle is completed.
d.b. - dry bulb;
w.b. - wet bulb
GB - 3
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38VYX050/38VYX080
Selection of installation
Air purge
Knockout procedure
• For air purge, use a vacuum pump.
• Do not use refrigerant charged in the outdoor unit for air purge.
(The refrigerant for air purge is not contained in the outdoor unit.)
• The indoor/outdoor connecting pipes can be connected to 4
directions. Take off the knockout part of the pipe cover in which
pipes or wires pass through the base plate.
• As shown in the figure, do not remove the pipe cover from the
cabinet so that the knockout hole can be easily punched.
To knock out, punch the 3 connected parts with a screwdriver and
remove the pipe cover by hand.
Electrical cabling
• Be sure to fix the power cables and indoor/outdoor connecting
cables with clamps so that they do not contact with the cabinet,
etc.
• After marking the knockout hole, remove the burr and mount the
attached protective bush and guard material for pass-through part
in order to protect pipes and wires.
• After connecting the pipes, be sure to mount the pipe cover. The
pipe cover is easily mounted by cutting off the slit at the lower part
of the cover.
Installation Place
• A place which provides a specified space around the outdoor unit.
• A place where the operation noise and discharged air are not
given to your neighbors.
• A place that is not exposed to a strong wind.
• A place that does not block a passage.
• When the outdoor unit is installed in an elevated position, be sure
to secure its feet.
• There must be sufficient space for carrying in the unit.
• A place where the drain water does not make any problem.
• If the unit is installed in areas where heavy snowfalls may occur, it
is necessary to raise its level at least 200 mm above the usual
snow level.
ቢ
How to remove the front panel
1. Remove screws of the front panel.
2. Pull the front panel downward.
Removing the front panel, the electric parts appear at the front side.
ቢ Strong wind
•
The power supply cables can be inserted into the pipe holes.
Enlarge the pipe holes if they are too small.
CAUTION:
•
Be sure to fix the power cable and indoor/outdoor connecting
cable with bundling band sold on the market so that they do not
make contact with the compressor and the hot pipes.
To ensure good tensile strength, the electric cables must be
fastened using the cable-holder on the plate.
• Install the outdoor unit at a place where discharge air is not blocked.
• When an outdoor unit is installed in a place that is always exposed
to a strong wind like a coast or on a high storey of a building,
secure a normal fan operation by using a duct or a wind shield
• When installing the outdoor unit in a place that is constantly
exposed to a strong wind such as the upper stairs or rooftop of a
building, apply the windproof measures referring to the following
examples.
• Install the unit so that its discharge port faces the wall of the
building. Keep a distance 500 mm or more between the unit and
the wall surface.
• Supposing the wind direction during the operation season of the
air conditioner, install the unit so that the discharge port is set at
right angle to the wind direction.
ቢ
• Installation in the following places may result in some troubles. Do
not install the unit in such places below.
•
•
•
A place full of machine oil.
A place full of sulphuric gas.
A place where high-frequency radio waves are likely to be
generated as from audio equipment, welders, and medical
equipment.
ቢ Strip
ቢ
38VYX 080
ቦ
Cover knockout for pipe connection
ꢀ
ቤ
ቢ
ꢀ
ቢ Rear direction
ꢀ Pipe cover
ቤ
ብ
ቤ Side direction
ብ Down direction
ቦ Front direction
ቢ Electric parts box
ꢀ Fixing plate
ቤ Piping hole
ቦ
ብ Cable-holder for electric cables
ቦ Front panel
ብ
GB - 4
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38VYX050/38VYX080
Refrigerant piping
E N G L I S H
lign the centres of the connecting pipes and tighten the flare nut
as strong as possible with your fingers.
Then fix the nut with a spanner and tighten it with torque wrench as
shown in the figure.
38 VYX 050
Pipe forming / positioning
• Pipe forming.
Form the pipe along with a marked line of the cabinet.
• End positioning of pipe.
Match the ends of both pipes at a distance of 85 mm apart from
the marked line.
ብ
ቤ
ቧ
ቦ
C
D
ቤ Half union or packed valve
ብ Flare nut
ቧ Externally threaded side
C Fix with spanner.
ቢ
ቦ Internally threaded side
D Tighten with torque wrench.
ቢ Marked line
• As shown in the figure, use two spanners to unscrew or tighten
the valve flare nut, at gas side.
Flaring
1. Cut the pipe with a pipe cutter.
If using a single spanner, the nut cannot be tightened with
necessary tightening torque.
On the contrary, use a single spanner to loosen or tighten the flare
nut of the valve at liquid side.
90˚
ቢ
ꢀ
ቤ
ቨ
ቨ
ቩ
ቢ Obliquity
ꢀ Roughness
ቤ Warp
F
ቨ Cover
ቩ Piping valve
E
2. Insert a flare nut into the pipe, and flare the pipe.
ꢁ Flare nut
E Tightened
F Loosened
As the flaring sizes of R410A differ from those of refrigerant R22,
the flare tools newly manufactured for R410A are recommended.
ꢁ
REQUIREMENT:
1. Do not put the spanner on the cap. The valve may be broken.
TableV: Pipe outer diameter
Outer dia. of copper pipe
A +-00,4 mm
2. If applying excessive torque, the nut may be broken according to
some installation conditions.
R410A
9,1
R22
9,0
6,35
9,52
• After the installation work, be sure to check gas leak of connecting
part of the pipes with nitrogen.
13,2
13,0
12,7
15,9
16,6
19,7
16,2
19,4
ቨ
• In case of flaring for R410A with the conventional flare tool, pull it
out approx. 0.5 mm more than that of R22 to adjust to the
specified flare size.
The copper pipe gauge is useful for adjusting projection margin
size.
B
A
ቨ Cover
• Pressure of R410A is higher than that of R22 (Approx. 1.6 times).
Therefore, using a torque wrench, tighten the flare pipe
connecting sections which connect the indoor/outdoor units at the
specified tightening torque.
ቢ
Incomplete connections may cause not only a gas leak, but also a
trouble of the refrigeration cycle.
ቢ Flare at indoor unit side
IMPORTANT:
Do not apply refrigerating machine oil to the flared surface.
ꢀ Flare at outdoor unit side
ꢀ
GB - 5
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38VYX050/38VYX080
Minimum clearances
Obstacle at rear side
Upper side is free
Single unit installation
Obstacles at both right and left sides.
150
300
or more
or more
•
The height of the obstacle should be lower than the height of the outdoor unit.
Serial installation of two or more units
300
or more
300
or more
150
or more
•
The height of the obstacle should be lower than the height of the outdoor unit.
300
or more
Obstacle at rear side
Obstacle also at the upper side
150
or more
Obstacle at front side
Upper side is free
Single unit installation
Obstacles at both right and left sides.
Obstacle at front side
Obstacle also at the upper side
1000
or more
GB - 6
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38VYX050/38VYX080
Minimum clearances
E N G L I S H
Obstacles at both front and rear sides
Standard installation
Open the upper side and both right and left sides.
The height of obstacle at both front and rear side, should be lower than the height of the outdoor unit.
Serial installation of two or more units
Single unit installation
300
300
or more
or more
Serial installation at front and rear sides
Standard installation
Open the upper side and both right and left sides.
The height of obstacle at both front and rear side, should be lower than the height of the outdoor unit.
300
or more
1000
or more
1500
or more
2000
or more
200
or more
Installation
38 VYX 050
38 VYX 080
600
90
600
150
430
90
150
115
Drain
hole
Knockout
hole
Drain nipple
mounting hole
ø 28 Drain hole
15 mm or less
•
Set the out margin of the anchor bolt to 15mm or less..
• According to the following base diagram, fix the base firmly with
the anchor bolts.
(Anchor bolt, nut: M10 x 2 pairs)
• Before installation, check strength and horizontality of the base so
that abnormal sound does not generate.
GB - 7
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38VYX050/38VYX080
Installation
ቢ Knockout hole
ꢀ Waterproof rubber cap
ቤ Drain nipple
ቢ
ꢀ
A
Open
ቢ Drain nipple
ꢀ Waterproof rubber cap
ቢ
• In case of draining through the drain hose, attach the following
drain nipple and the waterproof rubber cap, and use the drain
hose (Inner diam.: 16mm) sold on the market.
And also seal the screws securely with silicone material, etc. so
that water does not drop down. Some conditions may cause
dewing or dripping of water.
A
ꢀ
ቤ
ቢ
ቢ Waterproof rubber
cap
38 VYX 080
ꢀ Base plate
ቤ Drain nipple
ꢀ
• When there is a possibility of freezing of drain at the cold district
or a snowfall area, be careful for drainage ability of drain.
The drainage ability increases when a knockout hole on the base
plate is opened. (Open the knockout hole to outside using a
screwdriver, etc.)
ቤ
38 VYX 050
TableVI: Optional Installation Parts
(local procure)
Parts name
Q’ty
Refrigerant piping
Liquid side: ø 6,35 mm o ø 9,52 mm
Gas side: ø 12,7 mm o ø 15,9 mm
CAUTION:
A
Each one
IMPORTANT FOR POINTS BELOW FOR PIPING WORK
1. Keep dust and moisture away from inside the connecting
pipes.
2. Tightly connect the connection between pipes and the unit.
3. Evacuate the air in the connecting pipes using VACUUM
PUMP.
Pipe insulating material
(polyethylene foam, 6 mm thick)
B
C
1
Putty, PVC tapes
Each one
4. Check gas leak at connected points.
Table VII: Piping connection
Capacity rank
Liquid piping
Gas piping
Outer diameter
Thickness
0,8
Outer diameter
Thickness
0,8
38 VYX 050
38 VYX 080
ø 6,4
ø 12,7
ø 9,52
0,8
ø 15,87
1,0
GB - 8
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38VYX050/38VYX080
Evacuating
E N G L I S H
Table VIII: Air Purge
Max. connecting
Height difference (m)
Hexagonal
wrench size
Capacity rank
pipe length (m)
Outdoor unit higher than indoor unit Outdoor unit lower than indoor unit
38 VYX 050
38 VYX 080
30
50
30
30
15
15
4 mm
- This air conditioner can be installed up to the connecting pipe length and height difference in the following table.
Vacuum pump
Air Purge
• As shown in the right figure, connect the charge hose after the
manifold valves are closed completely.
With respect to the preservation of terrestrial environment, adopt
“Vacuum pump” for air purge (Evacuate air in the connecting pipes)
when installing the unit.
• Attach the connecting port of the charge hose with a projection to
push the valve core (setting pin) to the charge port of the set.
• Open handle Low fully.
• Do not discharge the refrigerant gas to the atmosphere to
preserve the terrestrial environment.
• Turn ON the vacuum pump.(*1)
• Loosen the flare nut of the packed valve (Gas side) a little to
check the air passes through.(*2)
• Use a vacuum pump to discharge the air (nitrogen, etc.) remained
in the set. If the air remains, the capacity may decrease.
• Tighten the flare nut again.
• Execute vacuuming until the compound pressure gauge indicates
–101kPa (–76cmHg). (*1)
• Close handle Low completely.
• Turn OFF the vacuum pump.
• Leave the vacuum pump as it is for 1 or 2 minutes, and check the
indicator of the compound pressure gauge does not return.
• Open fully the valve stem or the valve handle. (First, at liquid side,
then gas side)
For the vacuum pump, be sure to use one with backflow preventer
so that the oil in the pump does not backflow into the pipe of the air
conditioner when the pump stops.
(If oil in the vacuum pump is put in an air conditioner including
R410A, it may cause trouble on the refrigeration cycle.)
• Disconnect the charge hose from the charge port.
• Tighten valve and caps of the charge port surely.
ቢ
ꢀ
38VYX050
38VYX080
ቢ
ꢀ
ቮ
ቤ
ቮ
ተ
ቭ
ቤ
ቯ
ብ
ቭ
ቱ
ብ
ቨ
ቦ
ቨ
ቲ
ቦ
ቧ
ቫ
ቧ
ቴ
ታ
ꢁ
ꢁ
ቩ
ቩ
ቫ
ቩ Packed valve (Gas side)
ꢁ Vacuum pump
ቫ Service port (Valve core (Setting pin))
ቭ Handle Lo
ታ Valve rod
ቴ Charge port
ꢂ Push in handle.
ቶ Handle
ቢ Compound pressure gauge
ꢀ Pressure gauge
ቤ Manifold valve
ብ Handle Hi (Keep fully closed)
ቮ -101kPa (-76cmHg)
ቦ Charge hose (For R410A only)
ቧ Vacuum pump adapter for counter-flow prevention
(For R410A only)
ቯ Valve unit
ተ Flare nut
ቱ Stopper
Pull out the handle and using cutting
pliers, etc. turn it counterclockwise
by 90˚. (Open fully)
ቨ Charge hose (For R410A only)
ቲ Charge cap
Close
Open
Handle position
Flexible charge pipe
(only for R410A)
ቯ
ቯ
Vacuum pump adapter for
counter-flow prevention
(only for R410A)
Flexible charge pipe
(only for R410A)
ቶ
ꢂ
A
ቶ
ቶ
ቴ
ቴ
closed
completely
opened
fully
ተ
ተ
*1. Use the vacuum pump, vacuum pump adapters, and gauge manifold referring to the manuals attached to each tool before using them. For the vacuum
pump, check oil is filled up to the specified line of the oil gauge.
*2. While the air is purged, check again that the connecting port of charge hose, which has a projection to push the valve core, is firmly connected to the
charge port.
GB - 9
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38VYX050/38VYX080
Evacuating
Valve handling precautions
• Open the valve stem or the handle until it strikes the stopper.
It is unnecessary to apply further force.
ø 6,35
14 a 18 N•m (1,4 a 1,8 kgf•m)
Valve
size
ø 9,52
33 a 42 N•m (3,3 a 4,2 kgf•m)
33 a 42 N•m (3,3 a 4,2 kgf•m)
20 a 25 N•m (2,0 a 2,5 kgf•m)
14 a 18 N•m (1,4 a 1,8 kgf•m)
ø 12,70
ø 15,87
• Securely tighten the cap with a torque wrench.
• Cap tightening torque
Service connection
Electrical connections
• Make refrigerant connections before electrical
connections.
When disconnecting, disconnect electrical connections before
refrigerant connections.
• The indoor - outdoor unit interconnecting wires must be A07 RN-F
type (245 IEC 57) or higher, with synthetic rubber insulation with
Neoprene coating, according to EN 60335-2-40 codes.
• The mains supply connecting cable for 38VYX units, must be H07
RN-F type (245 IEC 57) or higher, with synthetic rubber insulation
with Neoprene coating, according to EN 60335-2-40 codes.
Refer to the indoor unit installation manual for sizing of the
power supply wires.
IMPORTANT:
Make ground connection prior to any other electrical
connections.
Model
38VYX050
38VYX080
2. For inter connecting cable, do not use a wire jointed to another
on the way.
Power supply
220÷240 V
Single phase 50 Hz
12 A 15A
Use wires long enough to cover the entire length.
Maximum running current
Terminal block
Installation
fuse rating
25 A (type D
)
H07 RN-F (245 IEC 57)
2,5 mm2
Power cable
1 2 3 L N
All field electrical connections are the responsibility of the
installer.
WARNING:
• Wrong wiring may cause a burn-out to some electrical parts.
• Be sure to use the cord clamps attached to the product.
• Do not damage or scratch the conductive core and inner insulator
of power and inter-connecting cables when peeling them.
• Be sure to comply with local regulations of the cable from outdoor
unit to indoor unit.
ቢ Connecting
cable
ꢀ Power cable
ቢ
ꢀ
(wire size and cabling method etc.)
• Use the power and Inter-connecting cables with specified
thickness, specified type and protective devices required.
Power cable and connecting cable
1 2 3
10
L
N
38VYX050
How to remove the cover
1. Remove screws of the valve cover.
2. Pull the valve cover downward to remove it.
10
10
ቢ Connecting
cable
ꢀ Power cable
ቤ Ground
connector
40
30
30
ቦ
(mm)
ቤ
ቢ Piping cover
ꢀ Cord clamp
ቤ Indoor/outdoor
connecting cables
ብ Power cable
ቦ Valve cover
ቢ
ቢ
ꢀ
ꢀ
ቤ
• The installation fuse (25A D type
power supply line of this air conditioner.
) must be used for the
ብ
• Incorrect/incomplete wiring might cause an electrical fire or
smoke.
• Prepare the exclusive power supply for the air conditioner.
1. Connect the connecting cable to the terminal as identified with
their respective numbers on the terminal block of indoor and
outdoor unit.
• Ensure that mains supply connection is made through a switch
that disconnects all poles, with contact gap of a least 3 mm.
GB - 10
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38VYX050/38VYX080
Final installation checks
E N G L I S H
• Pressure of R410A is approx. 1.6 times higher than that of R22.
If installation work is incompletely finished, a gas leakage may
occur when pressure rises during operation.
ቢ
ብ
Therefore, be sure to test the piping connections for leakage.
• Check gas leakage at the flare nut connections, valve stem cap
connections and service port cap fittings with a leak detector or
soap water.
ቢ Piping cover
ቤ
ꢀ Check points
of outdoor unit
ቤ Flare nut
connections
(Indoor unit)
ብ Valve cover
Useful Functions (38VYX080 only)
Self-Diagnosis by LED Indication
Troubles of the outdoor unit can be diagnosed by LED indications
on the cycle control P.C. board of the outdoor unit. Utilize them for
various checks.
ꢀ
For the check by remote controller of the indoor unit, refer to the
Installation Manual of the outdoor unit.
Before a check, confirm each bit of the DIP switch is set to OFF
position.
Check and Test Operation
For R410A, use the leak detector exclusively manufactured for HFC
refrigerant (R410A, R134a, etc.).
• The conventional leak detector for HCFC refrigerant (R22, etc.)
cannot be used because its sensitivity for HFC refrigerant lowers
to approx. 1/40.
LED indication and code checking
LED indication
Cycle control
P.C. board
Cause
LED indication
D800 D801
D802 D803
Ț
Ȝ
Ț
Ȝ
Ȝ
Ț
Ț
Ȝ
Ȝ
Ț
Ȝ
«
Ȝ
Ȝ
Ț
Ț
Ț
Ț
Ȝ
Ț
Ț
Ț
Ȝ
Ȝ
«
Ȝ
Ț
Ȝ
Ȝ
Ȝ
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«
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Heat exchanger sensor (TE) error
Suction sensor (TS) error
Hot gas discharge sensor (TD) error
High-pressure protection error
Outdoor air temperature sensor error (TO)
Outdoor motorised fan error DC
Communication error between IPDU (Abnormal stop)
High-pressure release operation
Discharge temp. error: hot gas is too high
EEPROM error
D800 O: Red
D801 O: Yellow
D802 O: Yellow
D803 O: Yellow
«: Flashing
Ȝ: Off
Ț: On
Communication error between IPDU (No abnormal stop)
G-Tr short-circuit protection
Ȝ
«
Detect circuit error
«
Current sensor error
Ȝ
«
Ȝ
Ȝ
Comp. lock error
«
Comp. break down
GB - 11
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38VYX050/38VYX080
Final installation checks
diameter of the outdoor unit control valve (3 way 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 size of opposite
side of flare nuts has been changed. (for copper pipes with
nominal dimensions 1/2 and 5/8)
Installation/Servicing Tools
Changes in the product and components
In the case of an air conditioner using R410A, in order to prevent
any other refrigerant from being charged accidentally, service port
Table: New tools for R410A
New tools for R410A
Applicable to R22 model
Changes
As pressure is high, it is impossible to measure by means of conventional
gauge. In order to prevent any other refrigerant from being charged, each
port diameter is changed.
Gauge manifold
x
In order to increase pressure resisting strength,
Charge hose
hose materials and port size are changed (to 1/2 UNF 20 threads per
inch). When purchasing a charge hose, be sure to check the port size.
As pressure is high and gasification speed is fast, it is difficult
to read the indicated value by means of charging cylinder, as air bubbles
occur.
Electronic balance
o
for refrigerant charging
Torque wrench
(nominal diam. 1/2, 5/8)
The size of opposite sides of flare nuts have been increased. Incidentally,
a common wrench is used for nominal diameters 1/4 and 3/8.
x
o
Flare tool
By increasing the clamp bar’s receiving hole, strength of spring in the tool
(clutch type)
has been improved.
Gauge for projection
adjustment
Used when flare is made with using conventional flare tool.
-
-
Connected to the conventional vacuum pump. It is necessary to use an
adapter to prevent vacuum pump oil from flowing back to the charge hose.
The charge hose connecting part has two ports-one for conventional
refrigerant (7/16 UNF 20 threads per inch) and one for R410A.
If the vacuum pump oil (mineral) mixes with R410A a sludge may occur
and damage the equipment.
Vacuum pump
adapter
o
Gas leakage detector
x
Exclusive for HFC refrigerant.
• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in the U,S.’s ARI specified rose
color (ARI color code: PMS 507).
• Also, the “charge port and packing for refrigerant cylinder” require 1/2 UNF 20 threads per inch corresponding to the charge hose’s port
size.
GB - 12
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38VYX 050-080
Via R. Sanzio, 9 - 20058 Villasanta (MI) Italy - Tel. 039/3636.1
The manufacturer reserves the right to change any product specifications without notice.
November, 2003. Supersedes July 2003
Printed in Japan
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