Hitachi 4FSVN1Q Instruction Manual

4FSVN1Q
5FSVN1Q
6FSVN1Q
5FSYN1Q
6FSYN1Q
Model
Outdoor Unit
ORIGINAL INSTRUCTIONS
P00692Q
INVERTER-DRIVEN
MULTI-SPLIT SYSTEM
HEAT PUMP
AIR CONDITIONERS
- SET FREE -mini(R410A) -

I
if operate cool and heat mode at the same time,air conditioner system will be fluctuated for large difference in
temperature for changing operate mode.
This air conditioners only is appliable of cooling or heating mode,do not operate cool and heat mode together,
NOTE:
Install this air conditioners by local regulations or standards.
23WB
46 DB
30 DB
15.5 WB
15WB
-5 DB
15 DB
-20 WB

SAFETY SUMMARY
Use refrigerant R410A in the refrigerant cycle. Do not charge oxygen, acetylene
or other flammable and poisonous gases into the refrigerant cycle when performing a
leakage test or an air-tight test. These types of gases are extremely dangerous and
can cause an explosion. It is recommended that compressed air, nitrogen or
refrigerant be used for these types of tests.
Do not pour water into the indoor or outdoor unit. These products are equipped with
electrical parts. If poured, it will cause a serious electrical shock.
Do not touch or adjust safety devices inside the indoor or outdoor units. If these
devices are touched or readjusted, it may cause a serious accident.
Do not open the service cover or access panel for the indoor or outdoor units without
turning OFF the main power supply.
Refrigerant leakage can cause difficulty with breathing due to insufficient air. Turn OFF
the main switch, extinguish any naked flames and contact your service contractor, if
refrigerant leakage occurs.
The installer and system specialist shall secure safety against refrigerant leakage
according to local regulations or standards.
Use an ELB (Electric Leakage Breaker). In the event of a fault, there is danger of an
electric shock or a fire if it is not used.
Do not install the outdoor unit where there is a high level of oil mist, flammable gases,
salty air or harmful gases such as sulphur.
Do not use any sprays such as insecticide, lacquer, hair spray or other flammable
gases within approximately one (1) meter from the system.
If circuit breaker or fuse is often activated, stop the system and contact your service
contractor.
Do not perform installation work, refrigerant piping work, drain piping and electrical
wiring connection without referring to our installation manual. If the instructions are
not followed, it may result in a water leakage, electric shock or a fire.
Check that the ground wire is securely connected. If the unit is not correctly grounded,
it lead electric shock. Do not connect the ground wiring to gas piping, water piping,
lightning conductor or ground wiring for telephone.
Connect a fuse of specified capacity.
Do not put any foreign material on the unit or inside the unit.
Make sure that the outdoor unit is not covered with snow or ice, before operation.
Before performing any brazing work, check to ensure that there is no flammable
material around.
When using refrigerant be sure to wear leather gloves to prevent cold injuries.
Protect the wires, electrical parts, etc. from rats or other small animals.
If not protected, rats may gnaw at unprotected parts and which may lead to a fire.
Fix the cables securely. External forces on the terminals could lead to a fire.
II

Hitachi s consent in a written form.
Hitachi s liability shall not cover defects arising from the alteration performed by a customer without
III
Therefore, the utilization of the unit other than those indicated in these instructions is not
recommended.
SAFETY SUMMARY
Do not install the indoor unit, outdoor unit, remote control switch and cable within
approximately 3 meters from strong electromagnetic wave radiators such as medical
equipment.
Supply electrical power to the system to energize the oil heater for 12 hours before
start-up after a long shutdown.
Do not step or put any material on the product.
Provide a strong and correct foundation so that;
a. The outdoor unit is not on an incline.
b. Abnormal sound does not occur.
c. The outdoor unit will not fall down due to a strong wind or earthquake.
NOTE:
It is recommended that the room be ventilated every 3 to 4 hours.
The heating capacity of the heat pump unit is decreased according to the outdoor air
temperature. Therefore, it is recommended that auxiliary heating equipment be used in
the field when the unit is installed in a low temperature region.
Please contact your local agent, as the occasion arises.
The standard utilization of the unit shall be explained in these instructions.
accessories to determine if they are correct.
Check the model number, electrical characteristics (power supply, voltage and frequency) and
CHECKING PRODUCT RECEIVED
Upon receiving this product, inspect it for any shipping damage.
Claims for damage, either apparent or concealed, should be filed immediately with the shipping
company.





This product shall not be mixed with general household waste at the end of its life and it
shall be retired according to the appropriated local or national regulations in an environmentally
correct way. Due to refrigerant, oil and other components contained in the Air Conditioner,
its dismantling must be done by a professional installer accordingly to the applicable
regulations.
ATTENTION :
Contact the Hitachi Customer Care for more information.
!
''

5.6 Vacuum Pumping and Charging Refrigerant....................................................................
6.2 Electrical Wiring Connection ...........................................................................................
9
5.2 Refrigerant Piping Work ...................................................................................................
4.3 Service Space .................................................................................................................6
4.4 Installation Work ..............................................................................................................6
4.2 Initial Check .....................................................................................................................5
8. Test Run....................................................................................................................................
7. Outdoor Unit Dip-Switch Setting................................................................................................
3.2 Transportation ..................................................................................................................4
1. Safety Summary.......................................................................................................................
1
2.1 Outdoor Unit & Refrigerant Cycle .....................................................................................
28
9. Safety and Control Device Setting............................................................................................
24
23
20
6.1 General Check ................................................................................................................
6. Electrical Wiring .........................................................................................................................
19
5.9 Collecting Refrigerant .......................................................................................................
18
5.8 Additional Refrigerant Charge.....................................................................
17
5.7 Caution of the Pressure by Check Joint ...........................................................................
15
14
5.5 Air Tight Test.....................................................................................................................
13
5.4 Piping Connection ...........................................................................................................
12
5.3 Multi-Kit................................................................................................................
5. Refrigerant Piping Work ........................................................................................................... 7
5
4.1 Factory-Supplied Accessories .........................................................................................
..........5
2. Structure...................................................................................................................................1
3. Transportation and Handling ................................................................................................
3.1 Combination of Indoor and Outdoor Unit .....................................................................................
....4
7
5.1 Piping Materials ................................................................................................................
4
2.2 Necessary Tools and Instrument List for Installation ........................................................3
IV
TABLE OF CONTENTS
4. Outdoor Unit Installation..................................................................................................
19
19
1

Electrical Box
Reversing Valve
Check Valve
2. Structure
1. Safety Summary
Accumulator
Compressor
Heat Exchanger
Air Outlet
Air Inlet
Vibration Absorbing Rubber
Crankcase Heater
Pressure Sensor
High Pressure Switch
Bypass Solenoid Valve
Stop Valve for Gas Line
Stop Valve for Liquid Line
Electrical Expansion Valve
Strainer
Distributor
Check Joint for High/Low Pressure(Cool/Heat)
Oil Return Cpillary Tube
Strainer
Oil Return Solenoid Valve
Oil Seperator
Fan Motor
Propeller Fan
Strainer
..

Check Joint
Pressure Sensor
Pressure Switch
Solenoid Valve
Distributor
Capilary Tube
Reversing Valve
Heat Exchanger
Compressor
Refrigerant Flow Direction(Heating Operation)
Outdoor Unit
Bypass
Flare Connection
Field Refrigerant Piping
Refrigerant Flow Direction(Cooling Operation)
Discharge Gas Thermistor
Gas Line Refrigerant
Heat Exchanger Thermistor
Ambient Thermistor
Liquid Line Refrigerant
Piping Connection
Piping Connection
NO. Material
NO.
Strainer
Oil Seperator
Strainer
Strainer
Electrical Expansion Valve
Stop Valve for Gas Line
Stop Valve for Liquid Line
Bypass
Return Oil
Bypass&Return Oil
High Pressure Protect
High Pressure
Low Pressure
Remark
Accumulator
Compressor
Heat Exchanger
Capilary Tube
Capilary Tube
Reversing Valve
Distributor
Solenoid Valve
Pressure Switch
Pressure Sensor
Pressure Sensor
Check Joint
Check Valve

2.2 Necessary Tools and Instrument List for Installation

Use tools and measuring instruments only for the new refrigerant which is directly touch to refrigerant.
No. Tool No. Tool No. Tool No. Tool
1 Handsaw 6 Copper Pipe Bender 11 Spanner 16 Leveller
2
Screwdriver 7Manual Water Pump 12 Charging Cylinder 17 Clamper for Solder-
less Terminals
3 Vacuum Pump 8 Pipe Cutter 13 Gauge Manifold 18 Hoist
(for Indoor Unit)
4Refrigerant Gas
Hose 9 Brazing Kit 14 Cutter for Wires 19 Ammeter
5 Megohmmeter 10 Hexagon Wrench 15 Gas Leak Detector 20 Voltage Meter
: Interchangeability is available with current R22 : only for Refrigerant R410A (No Interchangeability with R22)
: Prohibited : only for Refrigerant R407C (No Interchangeability with R22)
R410A R407C
Pipe Cutter
Chamfering Reamer  -
Cutting Pipe
Removing Burrs
Flaring Tool  * The flaring tools for R407C are applicable to R22. Flaring for Tubes
* If using flaring tube, make dimension of tube
larger for R410A.
* In case of material 1/2H, flaring is not available.
Pipe Bender 
* In case of material 1/2H, bending is not available.
Use elbow for bend and braze.
Bending
Expanding Tool 
* In case of material 1/2H, expanding of tube is not
available. Use socket for connecting tube.
Expanding Tubes
*For
q
12.7
,
q
15.88
,
s
p
anner size is u
p
2mm.

*For q6.35, q9.53, q19.05, spanner size is
the same.
Brazing Tool * Perform correct brazing work. Brazing for Tubes
Nitrogen Gas 
* Strict Control against Contamin
(Blow nitrogen during brazing.)
Prevention from
Oxidation during
Brazing
Lubrication Oil
(for Flare Surface)
* Use a synthetic oil which is equivalent to the oil
used in the refrigeration cycle.
Applying Oil to the
Flared Surface
* Synthetic oil absorbs moisture quickly.
* Check refrigerant cylinder color. Refrigerant Charging
Liquid refrigerant charging is required regarding
zeotoropic refrigerant.
Vacuum Pump 

Vacuum Pumping
Adapter for
Vacuum Pump 
Manifold Valve 
* No interchangeability is available due to higher
pressures when compared with R22.
Charging Hose 
Do not use current ones to the different refrigerant.
If used, mineral oil will flow into the cycle and cause
sludges, resulting in clogging or compressor failure.
Connection diameter is different; R410A: UNF1/2,
R407C: UNF7/16.
Charging Cylinder * Use the weight scale. -
Weight Scale  -
Measuring
Instrument for
Refrigerant Charging
Refrigerant Gas
Leakage Detector 
* The current gas leakage detector (R22) is not
applicable due to different detecting method.
Gas Leakage Check
: Interchangeability with R407C.
Vacuum Pumping,
Vacuum Holding,
Refrigerant Charging
and Check of
Pressures


Measuring Instrument and Tool
Interchangeability
with R22 Reason of Non-Interchangeability and Attention
(: Strictly Required)
Torque Wrench
Vacuum
Drying
.
Refrigerant
Charge
Refrigerant
Cylinder
The current ones are applicable. However, it is
required to mount a vacuum pump adapter which
can prevent from reverse flow when a vacuum
pump stops, resulting in no reverse oil flow.
Use
Refrigerant
Pipe
Extrusion
Adjustment Gauge -
Connection of
Flare Nut
Dimensional Control
for Extruded Portion
of Tube after Flaring


3

3. Transportation and Handling
3.1 Combination of Indoor Unit and Outdoor Unit
3.2 Transportation
Max. Matching
Table 3.2 System Matching
Table 3.1 Indoor Unit Model
Below is indoor Unit combined with SET-FREE mini
FSVN1(Q)&FSYN1(Q)
Net Weight
Outdoor Unit Model
Fig.3.2 Transportation for no wooden base
If have no package to move,please protect with cloth
to
to
Min. Single
Operate Capacity
Quantity
Matching
Capacity
Min.Matching
Outdoor Unit Model
Available
Indoor Unit total Capacity must be 50% to 130% for
Outdoor Unit Nominal Capacity
Indoor unit
Capacity
to
to
to
Transport the product as close to the installation
location as practical before unpacking.
Do not put any material on the product.
Apply two lifting wires onto the outdoor unit,
when lifting it by crane.
Lifting Method
When lifting the unit, ensure a balance of
the unit, check safety and lift up smoothly.
(1) Do not remove any packing materials.
(2) Lift the unit under packing condition with
two (2) ropes, as shown in Fig. 3.1.
Fig. 3.1 Lifing Work for Transportation
Put Cloth or Paper
or paper
Do not put any foreign material into the
outdoor unit and check to ensure that none
exists in the outdoor unit before the
installation and test run. Otherwise, a fire or
failure, etc. may occur.
Nominal Capacity (HP)
1.0 1.3 1.5 1.8 2.0 2.3 2.5 3.0 4.0 5.0 6.0
In-the-Ceiling
4-Way Cassette
2-Way Cassette
Wall
Floor
Floor Concealed
Ceiling
Indoor Unit Type
HP HP HP
In-the-Ceiling
Low-height Type
Type
2.0 1.0
1.0
1.0
1.0
1.0
2.5
3.0
2.5
3.0
5.2
6.5
7.2
6.5
7.2
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q

4. Outdoor Unit Installation
5
for Anchor Bolts
Recommend
Accessory Q'ty
1
Quantity
Model
WSP-160A
service space(600mm).
Strong Wind
4.1 Factory-Supplied Accessories
Check to ensure that the following accessories
are packed with the outdoor unit.
If any of these accessories are not packed with
the unit, please contact your contractor.
Table 4.1 Factory-Supplied Accessories
4.2 Initial Check
•Install the outdoor unit where good ventilation is
available, and where it is dry.
•Install the outdoor unit where the sound or the
discharge air from the outdoor unit does not
affect neighbors or surrounding vegetation.
The operating sound at the rear or right/left
sides is higher than the value in the catalog at
the front side.
•Check to ensure that the foundation is flat, level
and sufficiently strong.
•Do not install the outdoor unit where there is a
high level of oil mist, salty air or harmful gases
such as sulphur.
•Do not install the outdoor unit where the
electromagnetic wave is directly radiated to the
electrical box.
•Install the outdoor unit as far as practical, being
at least 3 meters from the electromagnetic
wave radiator.
•When installing the outdoor unit in snow-
covered areas, mount the field-supplied hoods
at the discharge side of the outdoor unit and
the inlet side of the heat exchanger.
•Install the outdoor unit where it is in the shade
or it will not be exposed to direct sunshine or
direct radiation from high temperature heat
source.
•Do not install the outdoor unit where dust or
other contamination could block the outdoor
heat exchanger.
•Install the outdoor unit in a space with limited
access to general public.
NOTE
Washer
4
Direction of Strong Wind
•Do not install the outdoor unit in a space where
a seasonal wind directly blows to the outdoor
heat exchanger or a wind from a building space
directly blows to the outdoor fan.
•In case of installation in the open spaces
unavoidably where there is no buildings or
surrounding structures, adopt the wind guard
set or install near the wall to avoid facing the
wind directly. Ensure that the service space
should be secured.
(1) Using Wind Guard
Wing Guard Set
(Optional)
(2) A Wall to Guard Against Wind
Wall
Secure the adequate Direction of Strong Wind
Aluminum fins have very sharp edges. Pay
attention to the fins to avoid any injury.
NOTE
NOTE:
If the extreme strong wind blows directly against
the air discharge portion, the fan may rotate
reversely and be damaged.
Install the outdoor unit on a roof or in an area
where people except service engineers can not
touch the outdoor unit.
Direction of Air Discharge

6
M10
>200
shown below Fig4.1.
>50
4.3 Service Space
Install the outdoor unit with a sufficient space around the outdoor unit for operation and maintenance as
Single Installation Single Installation Multiple Installation
Upper Side is Open
Keep a distance of 100mm between
right side at least
>50
right side at least
Keep a distance of 100mm between
Fig. 4.1 Installation Space
'
Left Right&Upper Side is Open
4.4 Installation Work
(1) Secure the outdoor unit with the anchor
bolts.
Fig. 4.2 Installation of Anchor Bolts
Fix the outdoor unit to the anchor bolts by
special washer of factory-supplied
accessory.
(2) When installing the outdoor unit, fix the unit
by anchor bolts. Refer to Fig. 4.3
regarding the location of fixing holes.
Max. 21mm
A
ir Flow Direction
Anchor Bolt
Base of Outdoor Unit
Nut
Special Washer
Filled Mortar
Concrete
Fig. 4.3 Position of Anchor Bolts
NOTE:
When the mark * dimension is secured, piping
work from bottom side is easy without
interference of foundation.
Anchor bolts
hole
(3) Example of fixing outdoor unit by anchor
bolts.
Cut this portion when this type
of anchor bolt is used.
If not, it is difficult to remove
the service cover. Concrete Anchor Bolt
Max. 21mm (After cut "A " )
A
Fig. 4.4 Fixing Example
(4) Fix the outdoor unit firmly so that declining,
making noise, and falling down by strong
wind or earthquake is avoided.
Fixing Plate
(Field-Supplied) Both sides on the unit fixing
can be possible.
When vibration measures
are necessary,
add vibration proof rubber.
(Field-Supplied)
Fig. 4.5 Additional Fixing Arrangement
(5) When installing the unit on a roof or a
veranda, drain water sometimes turns to
ice in a cold morning. Therefore, avoid
draining in an area where people often use
because it is slippery.
>300
>200
>300
>100
>100
Front Air Outlet
(unit:mm)
(unit:mm)
(unit:mm)

5. Refrigerant Piping Work
(6) In case of the drain piping is necessary for
the outdoor unit, use the drain-kit
(DBS-26 or DBS-26L:Optional Parts) .
(7) The whole of the base of the outdoor unit
should be installed on a foundation. When
using vibration-proof mat, it should also be
positioned the same way.
When installing the outdoor unit on a field-
supplied frame, use metal plates to adjust
the frame width for stable installation as
shown in Fig. 4.6.
Base Width of Outdoor Unit
75mm
Frame Width 60mm
(Field-Supplied)
Frame
Incorrect
Outdoor Unit
is Unstable.
Metal Plate
100mm or more
Metal Plate
Correct
Frame
Base Width of Outdoor Unit
75mm
Outdoor Unit
is Stable.
C10
Recommended Metal Plate Size (Field-Supplied)
Material: Hot-Rolled Mild Steel Plate (SPHC)
Plate Thickness: 4.5T
Fig. 4.6 Frame and Base Installation
Hole
Use refrigerant R410A in the refrigerant cycle.
Do not charge oxygen, acetylene or other
flammable and poisonous gases into the
refrigerant cycle when performing a leakage
test or an air-tight test. These types of gases
are extremely dangerous and can cause an
explosion. It is recommended that
compressed air, nitrogen or refrigerant be
used for these types of tests.
5.1 Piping Materials
(1) Prepare locally-supplied copper pipes.
(2) Select the piping size from the Table 5.1.
(3) Select clean copper pipes. Make sure
there is no dust and moisture inside of the
pipes. Blow the inside of the pipes with
nitrogen or dry air, to remove any dust or
foreign materials before connecting pipes.
NOTE
Cautions for Refrigerant Pipe Ends
When installing pipe through
the wall, secure a cap at the
end of the pipe.
Correct CorrectIncorrect Incorrect
Correct Incorrect
HoleHole
Attach a cap
or vinyl tape. Attach a cap
or vinyl tape.
Attach a cap
or vinyl bag with
rubber band.
Do not place the pipe
directly on the ground.
Rain water can
enter.
Drain Hole Drain Hole
Position of Drain pipe joint
Optional
Front(Air Outlet)
7
(unit:mm) (unit:mm)

Flaring Dimension
Perform the flaring work as shown below.
Diameter
Piping Thickness and Material
Use the pipe as below.
Thickness Material
Diameter
Material is based on a JIS standard (JIS B8607).
Flare Nut Dimension
Use the flare nut as below.
<Flare Nut Dimension B
Diameter R410A
Dimension is based on a JIS standard
(JIS B8607).
Flare Nut
Cap the end of the pipe when the pipe is to
be inserted through a hole.
Do not put pipes on the ground directly
without a cap or vinyl tape at the end of the
pipe.
8
(unit:mm)
(unit:mm)
(unit:mm)

after finish charging.
Table 5.3 is Outdoor Unit Ref.charge before shipment
Inform local service the quantity of charging refrigerant
length,charge it to refrigerant cycle.
Calculate charge refrigerant quantity by liquid pipe
Outdoor Unit
it is required that additional refrigerant be charged
to piping length.
according
Although refrigerant has been charged into this unit,
(1) Ensure that the directions for refrigerant piping work according (2) Additional Refrigerant Charge R410A
to the tables.
Gas Pipe
Indoor Unit Pipe Model
Table 5.2 Indoor Unit Pipe Model
Table 5.1 Limitation of Outdoor Unit
Outer Diameter of Pipe
Model Gas Liquid
5.2 Refrigerant Piping Work
Diameter
Liquid Pipe
liquid length
liquid length
9
RPI-1.0~1.5FSNQL(H)
RPIZ-1.0~1.5FSN1Q
RCI-1.0~1.5FSN1Q
RCD-1.0~1.5FSN2Q
RPK-1.0~1.5FSNQ
RPF(I)-1.0~1.5FSNE
RPI-1.8~2.0FSNQL(H)
RPIZ-1.8~2.0FSN1Q
RCI-1.8~2.0FSN1Q
RCD-2.0FSN2Q,RPC-2.0FSN
RPK-2.0FSNQ~2.3FSNQ
RPI-2.3~3.0FSNQL(H)
RPIZ-2.3~2.5FSN1Q
RCI-2.3~3.0FSN1Q
RCD-2.5~3.0FSN2Q
RPC-2.5~3.0FSN
RPI-4.0~6.0FSNQL(H)
RCI-4.0~6.0FSN1Q
RCD-4.0~5.0FSN2Q
RPC-4.0~5.0FSN

Table 5.4 Refrigerant Pipe System&Additional Refrigerant Quantity
Outdoor Unit Oil Trap is recommended
at every 30meters lift
System
Item
Example of system
Base on the connection of the one outdoor
Max.Pipe Length
Max. Length of econcmic pipe Lt
Total Length of pipe
Max.height
between Outdoor
and Indoor Unit
Situation that position of outdoor
Max.height difference between all indoor
units or the indoor unit and multi-Kit
Max.Pipe Length
between Branch
Pipe and Indoor
Choose Branch
Pipe
From "a" Branch Pipe to
Indoor of Max. Distance
From every Branch Pipe
to Indoor of connecting
this system is calculted
in the following formula.
Total refrigerant charge
of
thereinto Total Liquid
Length Total Liquid
Total LiquidTotal Liquid
Length
Liquid
Pipe
Total
with
<Example>
Symbol
Mark
Size
Line Branch System
RAS-4 6FSVN1Q
~
RAS-5 6FSYN1Q
~
RAS-5FSVN1Q
unit and six indoor units as example.
The pipes should be provided at site.
difference unit is higher than that of
indoor unit
Situation that position of indoor
unit is higher than that of
outdoor unit

Branch System of Centralize Pipe
Outdoor Unit
Outdoor Unit
Oil Trap is recommended
at every 30meters lift Oil Trap is recommended
at every 30meters lift
with with with
<EXAMPLE>
Branch System of Embranchment & Centralize Pipe
RAS-5FSVN1Q
RAS-5FSVN1Q

Outer Diameter
Multi-Kit for Line Branch 5
3Table Multi-Kit
Multi-Kit
Gas Line
Liquid Line
Quantity
Unit Inner Diameter

Front Side Piping Cover
(4) Pipes can be connected from 4 directions
Tightening Torque for Flare Nut
Pipe Size
Right Side Piping Work
5.4 Piping Connection
Pipes can be connected from 4 directions.
Rear Side
Piping Cover
(Knock-Out Hole)
Rear Side Piping Work
(Knock-Out Hole)
(Knock-Out Hole)
Right Side Piping Work
Bottom Side
Piping Work
(Knock-Out Hole)
Front Side
Piping Work
(Knock-Out Hole)
Front Side Piping Cover
Fig. 5.1 Piping Direction
Front Side Piping Cover
Stop Valve
Connecting Pipe
Remove Direction of
Service Cover
Note Item for Removing Service Cover
Main Points for Removing
Service Cover Service Cover
Remove the bolts of
service cover following
Note
Press the service cover
right Fig.
when remove the bolts.
It is possible for service
cover to slide down.
Fix Hook (3 Points)
Fig. 5.2 Remove Service Cover
(1) Confirm that the valve is closed.
(2) Prepare a field-supplied bend pipe for
liquid line. Connect it to the liquid valve by
flare nut through the square hole of bottom
base.
(3) For Gas Piping Connection
Prepare a field-supplied bend pipe for gas
line. Braze it and the factory-supplied pipe
flange at the outside of the unit.
Do not apply the double
spanner work here.
Refrigerant leakage shall
occur.
Double Spanner Work Tightening Work for Stop Valve
Table 5.6 Torque
as shown Fig. 5.1. Make a knock-out hole
in the front pipe cover or bottom base to
pass through the hole.
After removing the pipe cover from the unit,
punch out the holes following the guide line
with screwdriver and a hammer.
Then, cut the edge of the holes and attach
insulation (Field-Supplied) for cables and
pipes protection.
Gap
Connect Front and Right Side Pipe
B
A
Front Side Piping Hole
Right Side Piping Hole
Press the service cover at front,
then remove it down slowly.

Model: FVC68D (Ether Oil)
(4) Stop Valve
<Liquid Valve>
Stop Valve Core for Opening and closing
Gas Valve
Liquid Valve
5.5 Air Tight Test
when attaching work is difficult.
pipes with rubber sheath (Field-
Rear Piping Work
Liquid Piping
Bottom Side Piping Work
Liquid Piping
Power Wire Gas Piping
Knock Out Hole
Bottom Base
Bottom Side Piping Hole
c
Rear Cover
To avoid damage protect cables and
Supplied).
Rubber Sheath(attatch part)
Cut a "+" shape gap at rubber sheath
center,wire lead rubber sheath.
Gas Pipe
Liquid Pipe
Power and Transmission Wire
Pipe Cover
insulation (Factory-Supplied) adequately
when installing the piping cover. Cut the
lower side guide line of the piping cover
To prevent gaps use a rubber bush and
Insulation Pipe
(1) The stop valve has been closed before
shipment, however, make sure that the stop
valves are closed completely.
(2) Connect the indoor unit and the outdoor
unit with field-supplied refrigerant piping.
Suspend the refrigerant piping at certain
points and prevent the refrigerant piping
from touching the weak part of the building
such as wall, ceiling, etc.
(If touched, abnormal sound may occur due
to the vibration of the piping. Pay special
attention in case of short piping length.)
(3) Apply the oil thinly at the seat surface of the
flare nut and pipe before tightening.
And when tightening the flare nut, use two
spanners.
Lubrication Oil is field-supply.
Manufacturer: IDEMITSU KOSAN Co., Ltd.
Completion
of Ref.
Piping
Repairing
of Leakage
Part
Check of
Pressure
Decrease
Applying
Nitrogen
Gas
Pass
Procedure
Fig.5.3 Stop Valve Position
Operation of the stop valve should be
performed according to the below.
Rear Piping Guide Hole
spindle valve
To open or close
Wrench(Size:4mm)
Hexagonal
(rubber)
O-Ring
Liquid Valve:37N m
Gas Valve:49N m
(Attach this after work)
torque below.
Tighten the cap with a
Liquid Valve:16N m Cap
torque below.
Tighten the cap with a
( )
can be connected
Only the charging hose
leakage will occur
at this posotion.If applied,
Do not apply two spanners
flare nut
here to squeeze
Use two spanners
Spindle Valve
Counterclockwise
Open
Close
Clockise
Close before shipment
Ref.Pressure
Refrigerant Piping
Liquid Stop Valve
....
....
Check Joint
.
.
.
Refrigerant Piping
( )