-
-
Wires for connecting indoor
and outdoor units
Exterior tape
Gas piping
Insulation
Liquid piping
Band (accessory)
Pipe cover (accessory)
Cable name plate
Power supply terminal block
○
It holds cables in place and protect the terminal
connection from external force.
○
This clamp is for the cable in the outside
diameter 9~15mm.
Please adjust it when not suitable.
○
Please be sure to carry out D-type (type III)
grounding work.
○
It has stuck on the lid of a control box.
Grounding terminal
Cable clamp
Indoor - Outdoor
connecting wire
Power cable
Please connect the earthed line of indoor and outdoor
connecting wire to a bracket part of the illustration
power cable, indoor - outdoor connecting wire circuit diagram
4. ELECTRICAL WIRING WORK
For details of electrical cabling, refer to the indoor unit installation manual.
3. DRAIN PIPING WORK
●
When condensed water needs to be
led to a drain, etc., install the unit on
a flat base (supplied separately as an
optional part) or concrete blocks.
ޓ
Then, please secure space for the drain
elbow and the drain hose.
Drain elbow
Grommet
Drain hose
(
To be procured on the installer's part
)
7) Heating and condensation prevention
(1) Dress refrigerant pipes (both gas and liquid pipes) for heat insulation and prevention of dew condensation.
- Improper heat insulation/anti-dew dressing can result in a water leak or dripping causing damage to household effects, etc.
(2) Use a heat insulating material that can withstand 120
℃
or a higher temperature. Poor heat insulating capacity can cause heat insulation problems or cable
deterioration.
- All gas pipes must be securely heat insulated in order to prevent damage from dripping water that comes from the condensation formed on them during a cooling operation
or personal injury from burns because their surface can reach quite a high temperature due to discharged gas flowing inside during a heating operation.
- Wrap indoor units’ flare joints with heat insulating parts (pipe cover) for heat insulation (both gas and liquid pipes).
- Give heat insulation to both gas and liquid side pipes. Bundle a heat insulating material and a pipe tightly together so that no gaps may be left between them and wrap them
together with a connecting cable by a dressing tape.
- Both gas and liquid pipes need to be dressed with 20 mm or thicker heat insulation materials above the ceiling where relative humidity exceeds 70%.
●
Execute drain piping by using a drain elbow and drain
grommets supplied separately as optional parts, where
water drained from the outdoor unit is a problem.
Where you are likely to have several days of sub-zero
temperatures in a row, do not use a drain elbow and
drain grommets. (There is a risk of drain water
freezing inside and blocking the drain.)
Do not put a grommet
on this hole.
This is a supplementary
drain hole to discharge
drain water, when a large
quantity of it is gathered.
CAUTION
CAUTION
Power cable, indoor-outdoor connecting wires
Always use an earth leakage circuit breaker designed for inverter circuits to
prevent a faulty operation.
RWC012A030
●
Always perform grounding system installation work with the power cord unplugged.
L
Outdoor unit
Switchgear or Circuit breaker
N
1 2/N 3
1 2/N 3
Indoor unit
SC-BIKN-E
Only SRK is necessary.
X
Y
X
Y
X
Y
X
Y
Remote controller
Earth leakage breaker
(Harmonic resistant type)
Interconnecting and
grounding wires
(minimum)
20
25
35
2.0
mm
2
30A
16A
1.5
mm
2
×3
15A,30mA,
0.1sec or less
Switchgear or Circuit Breaker
Switch breaker Over current protector
rated capacity
Earth leakage breaker
●
The specifications shown in the above table are for units without heaters. For units with heaters, refer to
the installation instructions or the construction instructions of the indoor unit.
●
Switchgear or Circuit breaker capacity which is calculated from MAX. over current should be chosen along the
regulations in each country.
●
The cable specifications are based on the assumption that a metal or plastic conduit is used with no more than
three cables contained in a conduit and a voltage drop is 2%. For an installation falling outside of these
conditions, please follow the internal cabling regulations. Adapt it to the regulation in effect in each country.
Power souce
(minimum)
Model
Phase
Single-phase
Take care so that installed pipes may not touch components within a unit.
If touching with an internal component, it will generate abnormal sounds and/or vibrations.
4) On-site piping work
IMPORTANT
How to remove the side cover
●
Carry out the on site piping work with the operation valve fully closed.
●
Give sufficient protection to a pipe end (compressed and blazed, or with an adhesive tape) so
that water or foreign matters may not enter the piping.
●
Bend a pipe to a radius as large as practical.(R100
〜
R150) Do not bend a pipe repeatedly to correct
its form.
●
Flare connection is used between the unit and refrigerant pipe. Flare a pipe after engaging a
flare nut onto it. Flare dimensions for R410A are different from those for conventional R407C.
Although we recommend the use of flaring tools designed specifically for R410A, conventional
flaring tools can also be used by adjusting the measurement of protrusion B with a protrusion
control gauge.
●
Tighten a flare joint securely with a double spanner.
Please remove the screw of a side cover and remove to the front.
A
B
Flared pipe end : A
(mm)
φ
6.35
φ
9.52
Copper
pipe outer
diameter
0
ー
0
．
4
Ａ
9
．
1
13.2
Copper pipe protrusion for flaring : B
(mm)
φ
6.35
φ
9.52
Copper
pipe outer
diameter
In the case of a rigid (clutch) type
With an R410A tool With a conventional tool
0
〜
0.5
1.0
〜
1.5
CAUTION
CAUTION
CAUTION
Do not apply force beyond proper fastening torque in tightening the flare nut.
Fix both liquid and gas service valves at the valve main bodies as illustrated on the right, and then fasten them,
applying appropriate fastening torque.
Tightening angle (
°
)
Tightening torque (N-m)
φ
6.35 (1/4")
φ
9.52 (3/8")
14
〜
18
34
〜
42
45
〜
60
30
〜
45
150
200
Use a torque wrench. If a torque wrench is
not available, fasten the flare nut manually
first and then tighten it further, using the
left table as a guide.
Recommended length of a tool handle (mm)
Operation valve size (mm)
5) Air tightness test
①
Although outdoor and indoor units themselves have been tested for air tightness at the factory, check the connecting pipes after the installation work for air tightness
from the operation valve’s check joint equipped on the outdoor unit side. While conducting a test, keep the operation valve shut all the time.
a) Raise the pressure to 0.5 MPa, and then stop. Leave it for five minutes to see if the pressure drops.
b) Then raise the pressure to 1.5 MPa, and stop. Leave it for five more minutes to see if the pressure drops.
c) Then raise the pressure to the specified level (4.15 MPa), and record the ambient temperature and the pressure.
d) If no pressure drop is observed with an installation pressurized to the specified level and left for about one day, it is acceptable. When the ambient Temperature fall
1
℃
, the pressure also fall approximately 0.01 MPa. The pressure, if changed, should be compensated for.
e) If a pressure drop is observed in checking e) and a) – d), a leak exists somewhere. Find a leak by applying bubble test liquid to welded parts and flare joints and
repair it. After repair, conduct an air-tightness test again.
②
In conducting an air-tightness test, use nitrogen gas and pressurize the system with nitrogen gas from the gas side. Do not use a medium other than nitrogen gas
under any circumstances.
Gas side
operation valve
Check joint
Pressur
ize
Close
Outdoor unit
Indoor unit
＜
Work flow
＞
6) Evacuation
Pay attention to the following points in addition to the above for the R410A and
compatible machines.
○
To prevent a different oil from entering, assign dedicated tools, etc. to each refrigerant
type. Under no circumstances must a gauge manifold and a charge hose in particular
be shared with other refrigerant types (R22, R407C, etc.).
○
Use a counterflow prevention adapter to prevent vacuum pump oil from entering the
refrigerant system.
Airtighteness test completed
Fill refrigerant
Vacuum gauge check
Vacuuming completed
Vacuuming begins
Run the vacuum pump for at least one hour after the vacuum
gauge shows -101kPa or lower. (-755mmHg or lower)
Confirm that the vacuum gauge indicator does not rise even if
the system is left for one hour or more.
When the system has remaining moisture
inside or a leaky point, the vacuum gauge
indicator will rise.
Check the system for a leaky point and
then draw air to create a vacuum again.
INSTALLATION TEST CHECK POINTS
After installation
Check the following points again after completion of the installation, and before turnig on the power. Conduct a test run again and ensure that the unit operates properly.
Explain to the customer how to use the unit and how to take care of the unit following the instruction manual.
Screw
Side cover
In case of faulty wiring connection, the indoor unit stops,
and then the run lamp turns on and the timer lamp blinks.
Use cables for interconnection wiring to avoid loosening of the wires.
CENELEC code for cables Required field cables.
H05
H
05
R
N
R
4or5
G
1.5
RNR3G1.5 (Example) or 245IEC57
Harmonized cable type
300/500 volts
Natural-and/or synth. rubber wire insulation
Polychloroprene rubber conductors insulation
Stranded core
Number of conductors
One conductor of the cable is the earth conductor
(yellow/green)
Section of copper wire (mm
2
)
Power cables and crossover wires are securely fixed to the terminal block.
The power supply voltage is correct as the rating.
The drain hose is fixed securely.
Operational valve is fully open.
No gas leaks from the joints of the operational valve.
The pipe joints for indoor and outdoor pipes have been insulated.
The reverse flow check cap is attached.
The cover of the pipe cover (A) faces downward to prevent rain from entering.
Gaps are properly sealed between the pipe covers (A) (B) and the wall surface / pipes.
Do not hold the valve cap area with a spanner.
Electrical installation work must be performed by an electrical installation service provider qualified by a power provider of the country.
Electrical installation work must be executed according to the technical standards and other regulations applicable to electrical installations in the country.
●
Do not use any supply cord lighter than one specified in parentheses for each type below.
- braided cord (code designation 60245 IEC 51),
- ordinary tough rubber sheathed cord (code designation 60245 IEC 53)
- flat twin tinsel cord (code designation 60227 IEC 41);
Use polychloroprene sheathed flexible cord (code designation 60245 IEC57) for supply cords of parts of appliances for outdoor use.
●
Ground the unit. Do not connect the grounding wire to a gas pipe, water pipe, lightning rod or telephone grounding wire.
If impropery grounded, an electric shock or malfunction may result.
●
A grounding wire must be connected before connecting the power cable. Provide a grounding wire longer than the power cable.
●
The installation of an impulse withstanding type earth leakage breaker is necessary. A failure to install an earth leakage breaker can result in an
acccident such as an electric shock or a fire.
●
Do not turn on the power until the electrical work is completeted .
●
Do not use a condensive capacitor for power factor improvement under any circumstances. (It dose not improve power factor, while it can cause
an abnormal overheat accident)
●
For power supply cables, use conduits.
●
Do not lay electronic control cables (remote control and signaling wires) and other cables together outside the unit. Laying them together can result
in the malfunctioning or a failure of the unit due to electric noises.
●
Fasten cables so that may not touch the piping, etc.
●
When cables are connected, make sure that all electrical components within the electrical component box are free of loose connector coupling or
terminal connection and then attach the cover securely. (Improper cover attachment can result in malfunctioning or a failure of the unit, if water
penetrates into the box.)
●
Always use a three-core cable for an indoor-outdoor connecting cable. Never use a shield cable.
Clearance
Wires for connecting indoor
and outdoor units
Exterior tape
Gas piping
Insulation
Liquid piping
Band (accessory)
Pipe cover (accessory)
Cable name plate
Power supply terminal block
○
It holds cables in place and protect the terminal
connection from external force.
○
This clamp is for the cable in the outside
diameter 9~15mm.
Please adjust it when not suitable.
○
Please be sure to carry out D-type (type III)
grounding work.
○
It has stuck on the lid of a control box.
Grounding terminal
Cable clamp
Indoor - Outdoor
connecting wire
Power cable
Please connect the earthed line of indoor and outdoor
connecting wire to a bracket part of the illustration
power cable, indoor - outdoor connecting wire circuit diagram
4. ELECTRICAL WIRING WORK
For details of electrical cabling, refer to the indoor unit installation manual.
3. DRAIN PIPING WORK
●
When condensed water needs to be
led to a drain, etc., install the unit on
a flat base (supplied separately as an
optional part) or concrete blocks.
ޓ
Then, please secure space for the drain
elbow and the drain hose.
Drain elbow
Grommet
Drain hose
(
To be procured on the installer's part
)
7) Heating and condensation prevention
(1) Dress refrigerant pipes (both gas and liquid pipes) for heat insulation and prevention of dew condensation.
- Improper heat insulation/anti-dew dressing can result in a water leak or dripping causing damage to household effects, etc.
(2) Use a heat insulating material that can withstand 120
℃
or a higher temperature. Poor heat insulating capacity can cause heat insulation problems or cable
deterioration.
- All gas pipes must be securely heat insulated in order to prevent damage from dripping water that comes from the condensation formed on them during a cooling operation
or personal injury from burns because their surface can reach quite a high temperature due to discharged gas flowing inside during a heating operation.
- Wrap indoor units’ flare joints with heat insulating parts (pipe cover) for heat insulation (both gas and liquid pipes).
- Give heat insulation to both gas and liquid side pipes. Bundle a heat insulating material and a pipe tightly together so that no gaps may be left between them and wrap them
together with a connecting cable by a dressing tape.
- Both gas and liquid pipes need to be dressed with 20 mm or thicker heat insulation materials above the ceiling where relative humidity exceeds 70%.
●
Execute drain piping by using a drain elbow and drain
grommets supplied separately as optional parts, where
water drained from the outdoor unit is a problem.
Where you are likely to have several days of sub-zero
temperatures in a row, do not use a drain elbow and
drain grommets. (There is a risk of drain water
freezing inside and blocking the drain.)
Do not put a grommet
on this hole.
This is a supplementary
drain hole to discharge
drain water, when a large
quantity of it is gathered.
CAUTION
CAUTION
Power cable, indoor-outdoor connecting wires
Always use an earth leakage circuit breaker designed for inverter circuits to
prevent a faulty operation.
RWC012A030
●
Always perform grounding system installation work with the power cord unplugged.
L
Outdoor unit
Switchgear or Circuit breaker
N
1 2/N 3
1 2/N 3
Indoor unit
SC-BIKN-E
Only SRK is necessary.
X
Y
X
Y
X
Y
X
Y
Remote controller
Earth leakage breaker
(Harmonic resistant type)
Interconnecting and
grounding wires
(minimum)
20
25
35
2.0
mm
2
30A
16A
1.5
mm
2
×3
15A,30mA,
0.1sec or less
Switchgear or Circuit Breaker
Switch breaker Over current protector
rated capacity
Earth leakage breaker
●
The specifications shown in the above table are for units without heaters. For units with heaters, refer to
the installation instructions or the construction instructions of the indoor unit.
●
Switchgear or Circuit breaker capacity which is calculated from MAX. over current should be chosen along the
regulations in each country.
●
The cable specifications are based on the assumption that a metal or plastic conduit is used with no more than
three cables contained in a conduit and a voltage drop is 2%. For an installation falling outside of these
conditions, please follow the internal cabling regulations. Adapt it to the regulation in effect in each country.
Power souce
(minimum)
Model
Phase
Single-phase
Take care so that installed pipes may not touch components within a unit.
If touching with an internal component, it will generate abnormal sounds and/or vibrations.
4) On-site piping work
IMPORTANT
How to remove the side cover
●
Carry out the on site piping work with the operation valve fully closed.
●
Give sufficient protection to a pipe end (compressed and blazed, or with an adhesive tape) so
that water or foreign matters may not enter the piping.
●
Bend a pipe to a radius as large as practical.(R100
〜
R150) Do not bend a pipe repeatedly to correct
its form.
●
Flare connection is used between the unit and refrigerant pipe. Flare a pipe after engaging a
flare nut onto it. Flare dimensions for R410A are different from those for conventional R407C.
Although we recommend the use of flaring tools designed specifically for R410A, conventional
flaring tools can also be used by adjusting the measurement of protrusion B with a protrusion
control gauge.
●
Tighten a flare joint securely with a double spanner.
Please remove the screw of a side cover and remove to the front.
A
B
Flared pipe end : A
(mm)
φ
6.35
φ
9.52
Copper
pipe outer
diameter
0
ー
0
．
4
Ａ
9
．
1
13.2
Copper pipe protrusion for flaring : B
(mm)
φ
6.35
φ
9.52
Copper
pipe outer
diameter
In the case of a rigid (clutch) type
With an R410A tool With a conventional tool
0
〜
0.5
1.0
〜
1.5
CAUTION
CAUTION
CAUTION
Do not apply force beyond proper fastening torque in tightening the flare nut.
Fix both liquid and gas service valves at the valve main bodies as illustrated on the right, and then fasten them,
applying appropriate fastening torque.
Tightening angle (
°
)
Tightening torque (N-m)
φ
6.35 (1/4")
φ
9.52 (3/8")
14
〜
18
34
〜
42
45
〜
60
30
〜
45
150
200
Use a torque wrench. If a torque wrench is
not available, fasten the flare nut manually
first and then tighten it further, using the
left table as a guide.
Recommended length of a tool handle (mm)
Operation valve size (mm)
5) Air tightness test
①
Although outdoor and indoor units themselves have been tested for air tightness at the factory, check the connecting pipes after the installation work for air tightness
from the operation valve’s check joint equipped on the outdoor unit side. While conducting a test, keep the operation valve shut all the time.
a) Raise the pressure to 0.5 MPa, and then stop. Leave it for five minutes to see if the pressure drops.
b) Then raise the pressure to 1.5 MPa, and stop. Leave it for five more minutes to see if the pressure drops.
c) Then raise the pressure to the specified level (4.15 MPa), and record the ambient temperature and the pressure.
d) If no pressure drop is observed with an installation pressurized to the specified level and left for about one day, it is acceptable. When the ambient Temperature fall
1
℃
, the pressure also fall approximately 0.01 MPa. The pressure, if changed, should be compensated for.
e) If a pressure drop is observed in checking e) and a) – d), a leak exists somewhere. Find a leak by applying bubble test liquid to welded parts and flare joints and
repair it. After repair, conduct an air-tightness test again.
②
In conducting an air-tightness test, use nitrogen gas and pressurize the system with nitrogen gas from the gas side. Do not use a medium other than nitrogen gas
under any circumstances.
Gas side
operation valve
Check joint
Pressur
ize
Close
Outdoor unit
Indoor unit
＜
Work flow
＞
6) Evacuation
Pay attention to the following points in addition to the above for the R410A and
compatible machines.
○
To prevent a different oil from entering, assign dedicated tools, etc. to each refrigerant
type. Under no circumstances must a gauge manifold and a charge hose in particular
be shared with other refrigerant types (R22, R407C, etc.).
○
Use a counterflow prevention adapter to prevent vacuum pump oil from entering the
refrigerant system.
Airtighteness test completed
Fill refrigerant
Vacuum gauge check
Vacuuming completed
Vacuuming begins
Run the vacuum pump for at least one hour after the vacuum
gauge shows -101kPa or lower. (-755mmHg or lower)
Confirm that the vacuum gauge indicator does not rise even if
the system is left for one hour or more.
When the system has remaining moisture
inside or a leaky point, the vacuum gauge
indicator will rise.
Check the system for a leaky point and
then draw air to create a vacuum again.
INSTALLATION TEST CHECK POINTS
After installation
Check the following points again after completion of the installation, and before turnig on the power. Conduct a test run again and ensure that the unit operates properly.
Explain to the customer how to use the unit and how to take care of the unit following the instruction manual.
Screw
Side cover
In case of faulty wiring connection, the indoor unit stops,
and then the run lamp turns on and the timer lamp blinks.
Use cables for interconnection wiring to avoid loosening of the wires.
CENELEC code for cables Required field cables.
H05
H
05
R
N
R
4or5
G
1.5
RNR3G1.5 (Example) or 245IEC57
Harmonized cable type
300/500 volts
Natural-and/or synth. rubber wire insulation
Polychloroprene rubber conductors insulation
Stranded core
Number of conductors
One conductor of the cable is the earth conductor
(yellow/green)
Section of copper wire (mm
2
)
Power cables and crossover wires are securely fixed to the terminal block.
The power supply voltage is correct as the rating.
The drain hose is fixed securely.
Operational valve is fully open.
No gas leaks from the joints of the operational valve.
The pipe joints for indoor and outdoor pipes have been insulated.
The reverse flow check cap is attached.
The cover of the pipe cover (A) faces downward to prevent rain from entering.
Gaps are properly sealed between the pipe covers (A) (B) and the wall surface / pipes.
Do not hold the valve cap area with a spanner.
Electrical installation work must be performed by an electrical installation service provider qualified by a power provider of the country.
Electrical installation work must be executed according to the technical standards and other regulations applicable to electrical installations in the country.
●
Do not use any supply cord lighter than one specified in parentheses for each type below.
- braided cord (code designation 60245 IEC 51),
- ordinary tough rubber sheathed cord (code designation 60245 IEC 53)
- flat twin tinsel cord (code designation 60227 IEC 41);
Use polychloroprene sheathed flexible cord (code designation 60245 IEC57) for supply cords of parts of appliances for outdoor use.
●
Ground the unit. Do not connect the grounding wire to a gas pipe, water pipe, lightning rod or telephone grounding wire.
If impropery grounded, an electric shock or malfunction may result.
●
A grounding wire must be connected before connecting the power cable. Provide a grounding wire longer than the power cable.
●
The installation of an impulse withstanding type earth leakage breaker is necessary. A failure to install an earth leakage breaker can result in an
acccident such as an electric shock or a fire.
●
Do not turn on the power until the electrical work is completeted .
●
Do not use a condensive capacitor for power factor improvement under any circumstances. (It dose not improve power factor, while it can cause
an abnormal overheat accident)
●
For power supply cables, use conduits.
●
Do not lay electronic control cables (remote control and signaling wires) and other cables together outside the unit. Laying them together can result
in the malfunctioning or a failure of the unit due to electric noises.
●
Fasten cables so that may not touch the piping, etc.
●
When cables are connected, make sure that all electrical components within the electrical component box are free of loose connector coupling or
terminal connection and then attach the cover securely. (Improper cover attachment can result in malfunctioning or a failure of the unit, if water
penetrates into the box.)
●
Always use a three-core cable for an indoor-outdoor connecting cable. Never use a shield cable.
Clearance
