38VYX050/38VYX080
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INST ALLA TION MANU AL
38VYX050/38VYX080
Heat pump split system outdoor units
For operation and maintenance instructions of this unit as well as installation
instructions of the indoor unit, refer to the relevant manuals.
Contents
Page
Precautions for safety.................................................................................................................... 2
Accessory and refrigerant ............................................................................................................. 3
Selection of installation.................................................................................................................. 4
Refrigerant piping . ........................................................................................................................ 5
Evacuating..................................................................................................................................... 9/10
Electrical connections.................................................................................................................... 10
Final installation checks ................................................................................................................ 11/12
ATTENTION INSTALLERS AND SERVICE TECHNICIANS!
AIR CONDITIONER WITH R-410A – QUICK REFERENCE GUIDE
•R-410A refrigerant operates at 50%-70% higher pressures than R-22. Be sure that servicing
equipment and replacement components are designed to operate with R-410A.
•R-410A refrigerant cylinders are pink.
• R-410A refrigerant cylinders have a dip tube which allows liquid to flow out with the cylinder in a vertical
position with the valve at the top.
•R-410A systems should be charged with liquid refrigerant. Use a commercial type metering device
in the manifold hose in order to vaporize the liquid refrigerant before it enters in the unit.
•A vacuum pump is not enough to remove moisture from oil.
•Oils absorb moisture rapidly. Do not expose oil to atmosphere.
•Never open system to atmosphere while it is under vacuum.
•When the system must be opened for service, break vacuum with dry nitrogen.
•Do not vent R-410A into the atmosphere.
•Use only Carrier matching indoor units (Table I).
ENGLISH
Table I
Heat
pump
models
38VYX 050 050 050 050 050
38VYX 080 080 080 080 080
—— — — —
—— — — —
Cassette Hi-Wall Satellite Console Power
“40KQV” “42PQV” “40SQV” “42VQV” supply
220
÷240V ~ 50Hz
GB - 1
38VYX050/38VYX080
General information
Precautions for safety
The unit must be installed according to the national plantengineering 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.
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.
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).
• 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.
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).
• This unit complies with low-voltage (EEC/73/23) and electromagnetic 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.
The installation fuse (25A D type
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.
• T urn 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.
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.
• 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.
) must be used for
• 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.
If the leaked refrigerant gas comes in contact with fire, noxious
gas may generate.
• 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 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.
• 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.
Required tools for installation work
- 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
- Pipe bender
- Water level
- Metal saw
R410A (Special requirement)
- 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
GB - 2
38VYX050/38VYX080
Accessory and refrigerant
ENGLISH
T able II: Accessory and Installation Parts
Outdoor unit Protective bush
Installation manual x 1 (For SM800AT only)
Drain nipple Guard material for passage
Waterproof rubber cap part (For SM800AT only)
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.
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.
T able III: Length of refrigerant
Length of refrigerant pipe connected
to indoor/outdoor units.
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
(2)
from 20 m to 50 m (38VYX 080) Add 40 g of refrigerant for every meter of pipe beyond 20 m
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.
(2)
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
1200g.). Charge the refrigerant accurately. Overcharge may cause a serious trouble of compressor.
T able IV : Operating limits
Cooling (2)
Heating (2)
Mains power supply Nominal single-phase voltage 220÷240V ~ 50Hz
(1)
Maximum conditions
Minimum conditions
Maximum conditions
Minimum conditions outdoor temperature –15°C d.b.
Operating voltage limits min. 198V – max. 264V
Refrigerant addition
.
outdoor temperature 43°C
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.
Notes: 1. Data referred to the outdoor unit only.
2. According to prEN14511.
d.b. - dry bulb; w.b. - wet bulb
WARNING:
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.
GB - 3
38VYX050/38VYX080
Selection of installation
Air purge
• 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.)
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.
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.
500
Strong wind
CAUTION:
• 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.
• 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.
Knockout procedure
• 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 cov er b y hand.
• 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.
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.
• The power supply cables can be inserted into the pipe holes.
Enlarge the pipe holes if they are too small.
• 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.
Strip
38VYX 080
Cover knockout for pipe connection
Rear direction
Pipe cover
GB - 4
Side direction
Down direction
Front direction
Electric parts box
Fixing plate
Piping hole
Cable-holder for electric cables
Front panel
38VYX050/38VYX080
Refrigerant piping
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.
85 mm
Marked line
Flaring
1. Cut the pipe with a pipe cutter.
90˚
ENGLISH
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.
C
Half union or packed valve
Flare nut
Internally threaded side
D
Externally threaded side
C Fix with spanner.
D Tighten with torque wrench.
• As shown in the figure, use two spanners to unscrew or tighten
the valve flare nut, at gas side.
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.
Obliquity
Roughness Warp
2. Insert a flare nut into the pipe, and flare the pipe.
As the flaring sizes of R410A differ from those of refrigerant R22,
the flare tools newly manufactured for R410A are recommended.
T able V: Pipe outer diameter
Outer dia. of copper pipe A
R410A R22
6,35 9,1 9,0
9,52 13,2 13,0
12,7 16,6 16,2
15,9 19,7 19,4
• 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.
A
+ 0
-0,4
mm
B
F
E
Cover
Piping valve
Flare nut
E Tightened
F Loosened
REQUIREMENT:
1. Do not put the spanner on the cap. The valve may be broken.
2. If applying excessive torque, the nut may be broken according to
some installation conditions.
• After the installation work, be sure to check gas leak of connecting
part of the pipes with nitrogen.
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.
Incomplete connections may cause not only a gas leak, but also a
trouble of the refrigeration cycle.
Flare at indoor unit side
Flare at outdoor unit side
IMPORTANT:
Do not apply refrigerating machine oil to the flared surface.
GB - 5
38VYX050/38VYX080
Minimum c learances
Single unit installation Obstacles at both right and left sides.
Obstacle at rear side
Upper side is free
200
or more
150
or more
300
or more
300
or more
150
or more
• The height of the obstacle should be lower than the height of the outdoor unit.
Serial installation of two or more units
200 or more
300
or more
• The height of the obstacle should be lower than the height of the outdoor unit.
Obstacle at rear side
Obstacle also at the upper side
150
or more
500
or more
150
or more
300
or more
Obstacle at front side
Upper side is free
Single unit installation Obstacles at both right and left sides.
500
or more
Obstacle at front side
Obstacle also at the upper side
1000
or more
1000
or more
1000
or more
GB - 6
38VYX050/38VYX080
Minimum clearances
The height of obstacle at both front and rear side, should be lower than the height of the outdoor unit.
Single unit installation
150
1000
Obstacles at both front and rear sides
Standard installation
Open the upper side and both right and left sides.
Serial installation of two or more units
or more
300
or more
Serial installation at front and rear sides
Standard installation
or more
300
or more
ENGLISH
200
or more
1000
or more
Installation
90
310
330
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.
1000
or more
300
or more
1500
or more
2000
or more
200
or more
38 VYX 050 38 VYX 080
600 90
115
76
400
365
150
Knockout
hole
600
Drain
hole
Drain nipple
mounting hole
150
430
ø 28 Drain hole
15 mm or less
• Before installation, check strength and horizontality of the base so
that abnormal sound does not generate.
• 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)
GB - 7
38VYX050/38VYX080
Installation
Knockout hole
Waterproof rubber cap
Drain nipple
A Open
Drain nipple
• 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.
Water proof rubber cap
38 VYX 050
Waterproof rubber
cap
Base plate
Drain nipple
A
38 VYX 080
• 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.)
T able VI: Optional Installation Parts
(local procure)
Parts name Q’ty
Refrigerant piping
A Liquid side: ø 6,35 mm o ø 9,52 mm Each one
Gas side: ø 12,7 mm o ø 15,9 mm
Pipe insulating material
B
(polyethylene f oam, 6 mm thick)
C Putty, PVC tapes Each one
1
CAUTION:
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.
4. Check gas leak at connected points.
Table VII: Piping connection
Capacity rank Liquid piping Gas piping
Outer diameter Thickness Outer diameter Thickness
38 VYX 050 ø 6,4 0,8 ø 12,7 0,8
38 VYX 080 ø 9,52 0,8 ø 15,87 1,0
GB - 8
38VYX050/38VYX080
Evacuating
Table VIII: Air Purge
Capacity rank
38 VYX 050 30 30 15
38 VYX 080 50 30 15
- This air conditioner can be installed up to the connecting pipe length and height difference in the following table.
Air Purge
With respect to the preservation of terrestrial environment, adopt
“Vacuum pump” for air purge (Evacuate air in the connecting pipes)
when installing the unit.
• Do not discharge the refrigerant gas to the atmosphere to
preserve the terrestrial environment.
• Use a vacuum pump to discharge the air (nitrogen, etc.) remained
in the set. If the air remains, the capacity may decrease.
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.)
Max. connecting Height difference (m) Hexagonal
pipe length (m)
Outdoor unit higher than indoor unit Outdoor unit lower than indoor unit
Vacuum pump
• As shown in the right figure, connect the charge hose after the
manifold valves are closed completely.
• 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.
• Turn ON the vacuum pump.
• Loosen the flare nut of the packed valve (Gas side) a little to
check the air passes through.
• Tighten the flare nut again.
• Execute vacuuming until the compound pressure gauge indicates
–101kPa (–76cmHg).
• 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)
• Disconnect the charge hose from the charge port.
• Tighten valve and caps of the charge port surely.
(*1)
(*1)
(*2)
ENGLISH
rench size
w
4 mm
Compound pressure gauge
Pressure gauge
Manifold valve
Handle Hi (Keep fully closed)
Charge hose (For R410A only)
Vacuum pump adapter for counter-flow prevention
(For R410A only)
Charge hose (For R410A only)
Close
*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.
38VYX050
Packed valve (Gas side)
Vacuum pump
Service port (Valve core (Setting pin))
Handle Lo
-101kPa (-76cmHg)
Valv e unit
Flare nut
Stopper
Charge cap
38VYX080
V alv e rod
Charge port
Push in handle.
Handle
Pull out the handle and using cutting
pliers, etc. turn it counterclockwise
by 90˚. (Open fully)
Open Handle position
A
Flexible charge pipe
(only for R410A)
Vacuum pump adapter for
counter-flow prevention
(only for R410A)
Flexible charge pipe
(only for R410A)
closed
completely
opened
fully
GB - 9
38VYX050/38VYX080
Evacuating
Valve handling precautions
ø 6,35 14 a 18 N•m (1,4 a 1,8 kgf•m)
Valve ø 9,52 33 a 42 N•m (3,3 a 4,2 kgf•m)
size ø 12,70 33 a 42 N•m (3,3 a 4,2 kgf•m)
ø 15,87 20 a 25 N•m (2,0 a 2,5 kgf•m)
Service connection 14 a 18 N•m (1,4 a 1,8 kgf•m)
Electrical connections
• Open the valve stem or the handle until it strikes the stopper.
It is unnecessary to apply further force.
• Securely tighten the cap with a torque wrench.
• Cap tightening torque
• Make refrigerant connections before electrical
connections.
When disconnecting, disconnect electrical connections before
refrigerant connections.
IMPORTANT:
Make ground connection prior to any other electrical
connections.
Model 38VYX050 38VYX080
Power supply 220÷240 V
Single phase 50 Hz
Maximum running current 12 A 15A
Installation
fuse rating
Power cable
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.
(wire size and cabling method etc.)
• Use the power and Inter-connecting cables with specified
thickness, specified type and protective devices required.
25 A (type D
H07 RN-F (245 IEC 57)
2,5 mm
2
)
• 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.
2. For inter connecting cable, do not use a wire jointed to another
on the way.
Use wires long enough to cover the entire length.
Terminal block
123LN
Connecting
cable
Power cable
Power cable and connecting cable
38VYX050
How to remove the cover
1. Remove screws of the valve cover.
2. Pull the valve cover downward to remove it.
1. Connect the connecting cable to the terminal as identified with
their respective numbers on the terminal block of indoor and
outdoor unit.
GB - 10
Piping cover
Cord clamp
Indoor/outdoor
connecting cables
Power cable
Valv e co v er
LN
10
30
• The installation fuse (25A D type ) must be used for the
power supply line of this air conditioner.
• Incorrect/incomplete wiring might cause an electrical fire or
smoke.
• Prepare the exclusive power supply for the air conditioner.
• Ensure that mains supply connection is made through a switch
that disconnects all poles, with contact gap of a least 3 mm.
10
Connecting
cable
Power cable
40
Ground
connector
123
10
30
(mm)
38VYX050/38VYX080
Final installation checks
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.
Piping cover
Check points
of outdoor unit
Flare nut
connections
(Indoor unit)
Valv e co v er
ENGLISH
• 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.
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.
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.
LED indication and code checking
LED indication Cycle control
P.C. board
LED indication
D800 D801 D802 D803
Heat exchanger sensor (TE) error
Suction sensor (TS) error
Hot gas discharge sensor (TD) error
D800 O: Red High-pressure protection error
D801 O: Yellow Outdoor air temperature sensor error (TO)
D802 O: Yellow Outdoor motorised fan error DC
D803 O: Yellow Communication error between IPDU (Abnormal stop)
High-pressure release operation
: Flashing Discharge temp. error: hot gas is too high
: Off EEPROM error
: On Communication error between IPDU (No abnormal stop)
Cause
G-Tr short-circuit protection
Detect circuit error
Current sensor error
Comp. lock error
Comp. break down
GB - 11
38VYX050/38VYX080
Final installation checks
Installation/Servicing T ools
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
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)
New tools for R410A Applicable to R22 model Changes
Gauge manifold x gauge. In order to prevent any other refrigerant from being charged, each
Charge hose x hose materials and port size are changed (to 1/2 UNF 20 threads per
Electronic balance o to read the indicated value by means of charging cylinder, as air bubbles
for refrigerant charging
Torque wrench
(nominal diam. 1/2, 5/8) a common wrench is used for nominal diameters 1/4 and 3/8.
Flare tool
(clutch type) has been improved.
Gauge for projection
adjustment
Vacuum pump o The charge hose connecting part has two ports-one for conventional
adapter
x
o
--
As pressure is high, it is impossible to measure by means of conventional
port diameter is changed.
In order to increase pressure resisting strength,
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
occur.
The size of opposite sides of flare nuts have been increased. Incidentally,
By increasing the clamp bar’s receiving hole, strength of spring in the tool
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.
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.
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
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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