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Multi Air Conditioning System
for Buildings (VRF System)
INSTALLATION MANUAL(PART NO. 9369021053-03)
This air conditioner uses new refrigerant HFC (R407C).For authorized service personnel only.
WARNING This mark indicates procedures which, if improperly performed, might lead to the death or serious injury ofthe user.
CAUTION This mark indicates procedures which, if improperly performed, might possibly result in personal harm to theuser, or damage to property.
WARNING
1 For the air conditioner to operate satisfactorily, install it as outlined in this installation manual.
2 Connect the indoor unit and outdoor unit with the air conditioner piping and cords available from ourstandard parts. This installation manual describes the correct connections using the installation set avail-able from our standard parts.
3 Installation work must be performed in accordance with national wiring standards by authorized personnelonly.
4 If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contactwith a flame, it produces a toxic gas.
5 Do not turn on the power until all installation work is complete.
6 During installation, make sure that the refrigerant pipe is attached firmly before you run the compressor.Do not operate the compressor under the condition of refrigerant piping not attached properly with 2-wayor 3-way valve open. This may cause abnormal pressure in the refrigeration cycle that leads to breakageand even injury.
7 During the pump-down operation, make sure that the compressor is turned off before you remove therefrigerant piping. Do not remove the connection pipe while the compressor is in operation with 2-way or3-way valve open. This may cause abnormal pressure in the refrigeration cycle that leads to breakageand even injury.
8 When installing and relocating the air conditioner, do not mix gases other than the specified refrigerantto enter the refrigerant cycle. If air or other gas enters the refrigerant cycle, the pressure inside the cyclewill rise to an abnormally high value and cause breakage, injury, etc.
• Be careful not to scratch the air conditioner when handling it.• After installation, explain correct operation to the customer, using the operating manual.• Let the customer keep this installation manual because it is used when the air conditioner is serviced or
moved.• The maximum length of the piping is shown in page 9. If the units are further apart than this, correct opera-
tion cannot be guaranteed.
Refrigerant
R407C
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STANDARD PARTS
The following installation parts are supplied. Use them as required.
Description
Flange jointassembly
Coupler heatinsulation
Gasket
Q’ty
1
2
1
Application
For connecting the piping
For outdoor side pipejoint
Installation betweenflange joint assembly andlarge valve
Description
Bolt
Drain pipe
Auxiliary pipe assembly
TERMINAL RESISTOR
Q’ty
2
3
1
1
Application
For fixing the flange jointassembly
For outdoor unit drainpiping work (Reversecycle model only)
For connecting the piping
For installation to theoutdoor unit circuit board
Product mass
305 kg
Protective boards
CONVEYANCE METHOD AND PRODUCT MASS
Fig. 1
Rope suspension area
• If you are suspending the unit and conveying it to its installationlocation, place the ropes under the bottom, using the two placeson the front and rear provided for suspending it.
• Be sure to suspend the unit with ropes from 4 places and becareful not to subject it to impacts.
• Place protective boards on the unit so the rope doesn’t makecontact with the bell mouth.
• Use 2 ropes which are 7 m in length or longer.
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SELECTING THE MOUNTING POSITION
Decide the mounting position together with the customer as follows:
WARNING
1 Install the unit where it will not be tilted by more than 5°.
2 When installing the outdoor unit it may be exposed to strong wind, fasten it securely.
(1) If possible, do not install the unit where it will be exposed todirect sunlight. (If necessary, install a blind that does not inter-fere with the air flow.)
(2) Install the outdoor unit in a place where it will be free frombeing dirty or getting wet by rain as much as possible.
(3) Install the unit where connection to the indoor unit is easy.
(4) During heating operation, drain water flows from the outdoorunit. Therefore, install the outdoor unit in a place where drainwater flow will not be obstructed. (Reverse cycle model only)
(5) Do not place animals and plants in the path of the warm air.
(6) Take the air conditioner weight into account and select a placewhere noise and vibration are small.
(7) Select place so that the warm air and noise from the air condi-tioner do not disturb neighbors.
(8) Install inlet and outlet ducts in order to maintain stable opera-tion in cold or snowy regions.
(9) Provide the space shown in Fig. 2 so that the air flow is notblocked.
• Installing the unit individually
Fig. 2
10 mm or more
10 mm or more
Front side
500 mmor more
300 mmor more
• Installing continuous units
Fig. 3
Side
Front side
10 mmor more
10 mmor more
300 mmor more
10 mmor more
500 mmor more
10 mmor more
Side
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H (
1,20
0 m
m o
r le
ss)
L1 Top bloweroutlet
L2
h h
H (
1,20
0 m
m o
r le
ss)
Frontair
intake
Rearairin-
take
• There is no limit to the height of the side wall.• The height of the wall (H) on the front side and rear side should
be 1,200 mm or less (Fig. 4).• If the wall height exceeds 1,200 mm, add dimension (h) to the
respective service space dimensions L1 and L2 (Fig. 4).H 1,200 : L1 500, L2 300H > 1,200 : L1 > 500+h, L2 > 300+h
• The dimensions shown above are minimum required limit toprevent a decline in performance. The space provided shouldbe increased in consideration of passageways and room formaintenance.
Fig. 4
CONNECTION PIPE REQUIREMENT
(1) Connected to outdoor unit
* Capacity: The number displayed on the model name for the indoor and outdoor units.
• Use pipe with water-resistant heat insulation.• Use pipe that can withstand a pressure of 3,040 kPa.• The discharge gas pipe is only connected on heat recovery models.
(3) Connected to indoor unit
Table 1unit : mm
Capacity of Suction Dischargeoutdoor unit Gas Pipe Gas Pipe
Liquid Pipe
90 ø28.58 (1.2) ø19.05 (1.0) ø12.7 (0.8)
( ) : thickness
(2) Connected between two immediately adjacent refrigerant branch kits
Table 2unit : mm
Total capacity Suction Dischargeof indoor unit Gas Pipe Gas Pipe
Liquid Pipe
Less than 30 ø15.88 (1.0) ø12.7 (0.8) ø9.53 (0.8)
31 or more to 60 ø19.05 (1.0) ø15.88 (1.0) ø9.53 (0.8)
61 or more ø28.58 (1.2) ø19.05 (1.0) ø12.7 (0.8)
( ) : thickness
Table 3unit : mm
Capacity ofindoor unit
Gas Pipe Liquid Pipe
7, 9 ø9.53 (0.8) ø6.35 (0.8)
12, 14 ø12.7 (0.8) ø6.35 (0.8)
18, 20, 24, 25 ø15.88 (1.0) ø6.35 (0.8)
30 ø15.88 (1.0) ø9.53 (0.8)
36, 45, 54, 60 ø19.05 (1.0) ø9.53 (0.8)
( ) : thickness
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ELECTRICAL REQUIREMENTTable 4
Power supply Maximum 8.0
cord (mm2) Minimum 6.0
Transmission Maximum 1.25
cord (mm2) Minimum 0.75
Remote control Maximum 1.25
cord (mm2) Minimum 0.75
Outdoor unit fuse capacity (A) 40
Shield cord(LONWORKS
compatible part)
Type245 IEC57or equivalent
Sheathed vinylcord cable
INSTALLATION PROCEDURE
Install the air conditioner as follows.
1. OUTDOOR UNIT INSTALLATION
1. OUTDOOR UNIT PROCESSING
When the outdoor unit will be exposed to strong wind, fasten itwith anchor bolts at the four places indicated by the arrows(Fig. 5).
(1) Anchor Bolt Positions
• The distance between the left and right anchor bolts should beat least 850 mm.
• Set the unit on a strong stand, such as concrete blocks to mini-mize shock and vibration.
• Do not set the unit directly on the ground because it will causeproblems.
Fig. 5
Drain pipe
Rear panel
Knockout hole
Drain pipe mounting holes Rear panel
Hose
Drain pan
(2) Drain Processing
• Remove the rear panel.• Since the drain water flows out of the outdoor unit during heat-
ing operation, install the drain pipe and connect it to an com-mercial 16 mm hose. (When heating the outdoor temperatureis 0 °C or less, construct so that drain water from the outdoorunit will not freeze in the drain pipe.)
• Always use a drain pipe at three places.
Fig. 6
• Install the disconnection device with a contact gap of at least 3mm nearby the units. (Both indoor unit and outdoor unit)
NOTE: Install in accordance with local rules and regulations.
1,300 mm
1,000 mm850 mm
703
mm
650
mm
678
mm
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2. OUTDOOR UNIT CONNECTION CORD AND PIPE CONNECTION PREPARATIONS
(1) Piping and connection cord mounting direction (4-way mounting possible).• If a mounting bracket is installed at the knockout hole section in the base, do not connect the piping from the bottom.• If the piping is connected from the rear, be sure that there is enough space around the unit to make connections.
Fig. 7 Fig. 8
(2) Remove the front panel right.
Fig. 9
Bottom piping
Rear piping
Front piping Right piping
75
Unit: mm
Knockout hole210 30 36
Outdoor unit
CAUTION
Drain water will leak from the bottom of the outdoor unit during cooling/heating operation, even if the drainpipe is connected. To prevent the area surrounding the outdoor unit from getting wet, install a gutter surround-ing the outdoor unit as shown in the figure below for drain water.
1/1001/100Gutter
50 mmor more
10 mm or more
Gutter
Front panel right
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(3) Before connecting flange joint assembly to ball valve.Remove bolts, valve plate and gasket.
Fig. 10
(4) Open the piping and connection cord knockout holes of the desired direction with nippers, etc.After opening a hole in the center of bush, pierce with connection cord. (Rear, Right and Left wiring)
Fig. 11
(5) Connect the piping and connection cord from the mounting holes.
Fig. 12
(Example)
Valve plate
Ball valve
Gasket
Bolt
Washer
Transmission cord(Indoor unit and outdoorunit connection cord)
Bush
Power supply cord
Coupler heat insulation Small pipe Middle pipe (Heat recovery model only)
Large pipe
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2. CONNECTING THE PIPING
CAUTION
1 Do not use mineral oil on flared part.Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.
2 Never use piping which has been used for previous installations. Only use parts which are delivered withthe unit.
3 While welding the pipes, be sure to blow nitrogen gas through them.
• If nitrogen gas is not blown through the pipes while they are being welded, an oxidized layer may form onthe inside of the pipes. If this occurs, the cooling efficiency may decrease and the air conditioner unit(compressor, valves, etc.) may malfunction.
1. FLARE PROCESSING
(1) Cut the connection pipe with pipe cutters so that the pipe isnot deformed.
(2) Holding the pipe downwards so that cuttings cannot enter thepipe and remove the burrs.
(3) Remove the flare nut from the indoor unit pipe and outdoorunit and assemble as shown in (Table 5) and insert the flarenut onto the pipe, and flare with a flaring tool.
(4) Check if the flared part “L” (Fig. 13) is spread uniformly andthat there are no cracks.
Table 5
Fig. 13
Pipe
Small pipe(ø12.7 mm)
Middle pipe(ø19.05 mm)
Flare nut
width across flats24 mm
with across flats36 mm
L dimension
1.9 to 2.2 mm
2.6 to 3.0 mm
Width across flats
2. BENDING PIPES
The pipes are shaped by your hands. Be careful not to collapsethem.Do not bend the pipes in an angle more than 90°.When pipes are repeatedly bent or stretched, the material willharden, making it difficult to bend or stretch them any more. Donot bend or stretch the pipes more than three times.
Fig. 14
When bending the pipe, there is a possibility to collapse. In thiscase, cut the heat insulating pipe with a sharp cutter as shown inFig. 15, and bend it after exposing the pipe. After bending thepipe as you want, be sure to put the heat insulating pipe back onthe pipe, and secure it with tape.
Fig. 15
Pipe
Heat insulatingpipe
Cutter
Cut line
CAUTION
1 To prevent breaking of the pipe, avoid sharp bends.Bend the pipe with a radius of curvature of 150 mm or over.
2 If the pipe is bent repeatedly at the same place, it will break.
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3. PERMISSIBLE LENGTH OF CONNECTION PIPING
• The RB unit is only used on heat recovery models.• Keep the length of straight portion of pipe between two branch kits longer than roughly 0.5 m.• Don’t use separation tube in the downstream of header.• Install separation tube and header in the correct direction specified in installation manual.
Fig. 16 EXAMPLE 1(Branch kit: Header)
b
a
Outdoorunit
H1
RBunit
Indoorunit
d
RBunit
Indoorunit
e
RBunit
Indoorunit
c
RBunit
Indoorunit H2 H4, f
H3
Fig. 17 EXAMPLE 2(Branch kit: Separation tube)
Fig. 18 EXAMPLE 3(Branch kit: Separation tube + Header)
Maximum permissible length (actual pipe length)
Between outdoor unit and farthest indoor unit
Total pipe length
Between outdoor unit and 1st branch kit
Between 1st branch kit and farthest indoor unit
Between RB unit and indoor unit (heat recovery models only)
100 m
200 m
70 m
40 m
10 m
EXAMPLE 1
a+b
a+c
a+d
a+e
a+b+c+d+e
b
c
d
e
f
EXAMPLE 2
a+g
a+b+h
a+b+c+i
a+b+c+d+j
a+b+c+d+e+k
a+b+c+d+e+f
a+b+c+d+e+f
+g+h+i+j+k
a
g
b+h
b+c+i
b+c+d+j
b+c+d+e+k
b+c+d+e+f
R
EXAMPLE 3
a+g+h
a+g+i
a+b+c
a+b+d
a+b+e
a+b+f
a+b+c+d+e
+f+g+h+i
g+h
g+i
b+c
b+d
b+e
b+f
c, d, e, f
Outdoorunit
RBunit
Indoorunit
RBunit
Indoorunit
H2
H3
H4,R
f
e
RBunit
Indoorunit
d
RBunit
Indoorunit
c
RBunit
Indoorunit
b
H1
RBunit
Indoorunit
a
kjihg
Table 6
EXAMPLE 1 EXAMPLE 2
H1
H2
H3
H4
EXAMPLE 3Maximum permissible height difference
Between outdoor Outdoor unit installed higher than indoor unitunit and indoor unit Outdoor unit installed lower than indoor unit
Between indoor units
Between RB units (heat recovery models only)
Between RB unit and indoor unit (heat recovery models only)
50 m
40 m
15 m
15 m
5 m
Outdoorunit
b
RBunit
Indoorunit
RBunit
Indoorunit
i
a
H1
h
gc
Indoorunit
Indoorunit
RB unit4 branch
e f
Indoorunit
d
IndoorunitH2
H3 H4
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5. CONNECTION PIPES
(1) Tighten the flare nut of the connection pipe at the outdoor unitvalve connector.
(2) Seal with the accessory putty so that water does not enter atthe top of the pipe insulation installed to the connection pipe.
(3) After connecting the pipes, an air tightness test must be per-formed. To perform the test, close the valve and increase thepressure of the nitrogen gas to 30 kg/cm2 G.
CAUTION
Be sure to apply the pipe against the port on the indoor unit correctly. If the centering is improper, the flare nutcannot be tightened smoothly. If the flare nut is forced to turn, the threads will be damaged.
When the flare nut is tightened properly by your hand, hold thebody side coupling with a separate spanner, then tighten with atorque wrench (Fig. 20).
Holding spanner
Body side
Torque wrench
Fig. 20
4. SELECTING A BRANCH KIT
A. Header selection
Table 7
B. Separation tube selection
Table 8
C. RB unit selection (Heat recovery models only)
Table 9
Number of branches(Number of indoor units connected)
1 unit
1 to 4 units
Model name of RB unit to be used
UTF-Y54A1A
UTF-Y90A4A
Fig. 19
Flare nutFlare nut
Connection pipe
Connection pipe (Heat recoverymodel only)
Flange joint assembly
Washer
Bolt (Accessory)
Gasket (Accessory)
Number of branches(Number of indoor units connected)
6 units or less
7 to 8 units
UTR-HD906R
UTR-HD908R
Model name of header to be used
Total capacity of indoor units
Less than 60
61 or more
Model name of separation tube to be used
UTR-BP54MA
UTR-BP90MA
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Installation angle• Separation tubeInstall the separation tube so that it branches either horizontally or vertically.
Fig. 22 Fig. 23
• HeaderInstall the header so that it branches horizontally.When connecting the connection pipes from the indoor units, connect them to the header branch pipes in the order 1, 2, 3, etc. (Fig. 24)
Fig. 24
Horizontal
Horizontal line±30°
Vertical
CAUTION
Hold the torque wrench at its grip, keeping it in the right angle with the pipe as shown in Fig. 21, in order totighten the flare nut correctly.
Table 10: Flare nut tightening torque
Pipe Tightening torque
Small pipe (ø12.7 mm) 500 to 550 kgf · cm (49 to 53.9 N · m)
Middle pipe (ø19.05 mm) 800 to 1,000 kgf · cm (78.4 to 98 N · m)
Large pipe (Bolt) (ø28.58 mm) 350 to 400 kgf · cm (34.3 to 39.2 N · m)
• Connecting the flange joint pipe.
Fig. 21
Torque wrench
Flangejoint pipe
Gas pipe Liquid pipe
Outdoorunit side Outdoor
unit side
or
12
34
...
12
34
...
CAUTION
Use a level to make sure that the header is positioned as shown in the following figure, and then secure it in place.Fig. 25
A
H1α1
β1
B
H2α2
β2
Brazingpoint
HorizontalLine
VIEW A
Outdoorunit side
H1 = 0 mm – 10 mm(α1 : 0° – 1°)β1: -10° – 10°
Gas pipe Liquid pipe
Brazingpoint
HorizontalLine
VIEW B
Outdoorunit side
H2 = 0 mm – 10 mm(α2 : 0° – 1°)β2: -10° – 10°
VerticalLine
HorizontalLine
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Fig. 26
4. VACUUM PROCESS
CAUTION
1 Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation! There is no extrarefrigerant in the outdoor unit for air purging!
2 Use a vacuum pump for R407C exclusively. Using the same vacuum pump for different refrigerant maydamage the vacuum pump or the unit.
3. SEALING TEST
After the piping has been installed, perform a sealing test. Charge the piping with nitrogen to within the sealing test pressure(2.94 MPa). After 24 hours, check that the pressure has not fallen.
1. VACUUM
(1) Remove the cap, and connect the gauge manifold and thevacuum pump to the charging valve by the service hoses.
(2) Vacuum the indoor unit and the connecting pipes until the pres-sure gauge indicates -76 cmHg.
(3) When -76 cmHg is reached, operate the vacuum pump for atleast 1 hour.
(4) After vacuuming inside the indoor unit and connecting pipes,remove the cap of the three valves. See Fig. 26.(Remove the large and small valves on the cooling and heatpump models.)
(5) Open the handle (spindle) of the Large and Middle valves.Open the spindle of the Small valve with a hexagon wrench.See Table 12.(Open the Large and Small valves on the cooling and heatpump models.)
(6) Tighten the cap of the three valves to the specified torque.See Table 11.(Tighten the Large and Small valves on the cooling and heatpump models.)
Table 11
Tightening torque
Large valve and Middle valve Small valve
Spindle15 kgf·cm (1.47 N·m) or less
100 to 120 kgf·cm(handle) (9.8 to 11.7 N·m)
Cap150 to 200 kgf·cm 200 to 250 kgf·cm (14.7 to 19.6 N·m) (19.6 to 24.5 N·m)
Table 12
Middle valve
Open valve state Closed valve state
Large valve
Open valve state Closed valve state
∗ If the spindle (handle) is not fully open, perfor-mance will drop and an abnormal sound will begenerated.
Open
Close
Hexagon wrench
SpindleSmall valve
Small pipeMiddle pipe(Heat recovery model only)
Large pipeCharging valve
Cap
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2. ADDITIONAL CHARGE
Fig. 27
Vacuum pump.
Pressure gauge Pressure reduction valve
Refrigerantcontainer
R407C
ScaleNitrogen
Connected on heat recovery models only.∗ When conducting the vacuuming process from two pipes, use the Middle pipe and Small pipe.
B = + +
Total length of
ø12.70 mm
liquid pipe
mkg
× 0.136kg/m
Total length of
ø9.52 mm
liquid pipe
mkg
× 0.063kg/m
Total length of
ø6.35 mm
liquid pipe
mkg
× 0.025kg/m
ADDITIONAL CHARGE CALCULATION FORMULA• Additional refrigerant charge amount is calculated according to calculated value from its pipe length of liquid pipe and additional
amount for outdoor unit.• Round up the calculated result to two decimal places.
Calculation of additional refrigerant charge amount
1. Additional amount for outdoor unitA = 1.20 (kg)
2. Calculation of additional amount for pipe length
3. Calculation of additional refrigerant charge amount
C = A + B
Example: When the liquid pipe length are 20 m (ø12.70 mm), 15 m (ø9.52 mm), and 20 m (ø6.35 mm), respectively.1. Additional amount for outdoor unit:
A = 1.20 kg2. Calculation of additional amount for pipe length:
B = 20 (m) × 0.136 (kg/m) + 15 (m) × 0.063 (kg/m) + 20 (m) × 0.025 (kg/m)= 4.17 (kg)
3. Calculation of additional refrigerant charge amount:C = 1.20 kg + 4.17 kg
= 5.37 kg
AO 90MPCMF 11.80 1.20
ModelFactory charged
amount (kg)
AAdditionalamount for
outdoor unit (kg)
6.35 0.0259.52 0.06312.70 0.136
Diameter ofliquid pipe (mm)
BAdditional
amount for pipelength (kg/m)
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HOW TO CONNECT WIRING TO THE TERMINALS
A. For solid core wiring (or F-cable)
(1) Cut the wire end with a wire cutter or wire-cutting pliers, thenstrip the insulation to about 15/16" (25 mm) to expose the solidwire.
(2) Using a screwdriver, remove the terminal screw(s) on the ter-minal board.
(3) Using pliers, bend the solid wire to form a loop suitable for theterminal screw.
(4) Shape the loop wire properly, place it on the terminal boardand tighten securely with the terminal screw using a screw-driver.
5. ELECTRICAL WIRING
WARNING
1 Before starting work, check that power is not being supplied to the outdoor unit.
2 Match the terminal board numbers and connection cord colors with those of the outdoor unit.Erroneous wiring may cause burning of the electric parts.
3 Connect the connection cord firmly to the terminal board. Imperfect installation may cause a fire.
4 Always fasten the outside covering of the connection cord with the cord clamp. (If the insulator is chafed,electric leakage may occur.)
5 Always connect the ground wire.
Fig. 28
A. Solid wire
Str
ip 1
5/16
"(2
5 m
m)
Insulation
Loop
B. Strand wire
CAUTION
1 When charging the refrigerant R407C, always use an electronic balance for refrigerant charging (to meas-ure the refrigerant by weight).
2 When charging the refrigerant, take into account the slight change in the composition ofthe gas and liquid phases, and always charge from the liquid phase side whose composi-tion is stable.
3 Add refrigerant from the charging valve after the completion of the work.
4 The maximum length of the piping is 100 m (actual pipe length). If the units are further apart than this,correct operation can not be guaranteed.
B. For strand wiring
(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation to about 3/8" (10 mm) to expose the strand wiring.(2) Using a screwdriver, remove the terminal screw(s) on the terminal board.(3) Using a round terminal fastener or pliers, securely clamp a round terminal to each stripped wire end.(4) Position the round terminal wire, and replace and tighten the terminal screw using a screwdriver.
Wire
Screw withspecial washer
Roundterminal
Terminalboard
Terminal block
Screw withspecial washer
Wire
RoundterminalS
trip
3/8
"(1
0 m
m)
Round terminal
Gas
Liquid
R407C
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(1) Remove the front panel right.
Fig. 30
(2) Remove control box metal cover and connect the power supply cord and transmission cord.
Fig. 31 Fig. 32
Terminal board
Cable crip
Power supply cord Transmission cord
Insulation tube
Cord clamp
Control box metal
Front panel right
Control box metal cover
HOW TO FIX THE CONNECTION CORD AND POWER SUPPLY CORD AT THE CORD CLAMP
After passing the transmission cord and power supply cord through the insulation tube, fasten it with the cord clamp.
Use VW-1, 0.5 to 1.0 mm thick, PVC tube as the insulation tube.
Fig. 29
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R S TPOWER
N 2TRANSMISSION
1
12
RE
MO
TE
CO
NT
RO
L31
21
2TR
ANS
MIS
SIO
NPO
WER
SUPP
LY
12
RE
MO
TE
CO
NT
RO
L31
21
2TR
ANS
MIS
SIO
NPO
WER
SUPP
LY
Fig. 33
(Example)
Outdoor unit wiring
RB unit cord Power supply cord
Transmissioncord
Remote control cord
Remote control unit
Indoor unit wiring
Power supplycord
Refrigerant branch unit(Heat recovery model only)
CAUTION
1 Use care to wire properly. (Miswiring will result in damage.)
2 Never bundle the power supply cord, transmission cord and remote controller cord together. Bundlingthese cords together will cause misoperation.
3 The total length of the transmission cord should not exceed 500 meters. Note that the total length of thetransmission cord can be extended to 2,000 meters if the optional signal amplifier is used.
4 The power source capacity must be the sum of the air conditioner current and the current of other electricalappliances. When the current contracted capacity is insufficient, change the contracted capacity.
5 When the voltage is low and the air conditioner is difficult to start, contact the power company the voltageraised.
380-415 V 3ø 50 Hz220-240 V 1ø 50 Hz
Transmissioncord
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(3) Install the control box metal cover and front panel right. Fig. 34
WARNING
1 [1 phase TYPE]The rated voltage of this product is 220-240 V A.C. 50 Hz.Before turning on verify that the voltage is within the 198 V to 264 V range.
[3 phase TYPE]The rated voltage of this product is 380-415 V 3ø 50 Hz.Before turning on verify that the voltage is within the 342 V to 457 V range.
2 Always use a special branch circuit and install a special receptacle to supply power to the air conditioner.
3 Use a circuit breaker and receptacle matched to the capacity of the air conditioner.
4 Perform wiring work in accordance with standards so that the air conditioner can be operated safely andpositively.
5 Install a leakage circuit breaker in accordance with the related laws and regulations and electric companystandards.
Control box metal cover
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6. CIRCUIT BOARD SETTING
1. OUTDOOR UNIT SETTINGS
(1) Refrigerant circuit addressRotary switch (SW8) - - - Factory setting “0”Rotary switch (SW9) - - - Factory setting “0”In the case of multiple refrigerant systems, set SW8 and SW9 as shown in the Table 14 for each refrigerant system.Do not use a nonexistent switch setting conbination.Example: When SW9 is set to “1” and SW8 is set to “14”, the refrigerant circuit address will be “30”.
(2) Model settingsSet the DIP switch to the corresponding system type as shownin the Table 15.
Table 15
Heat pump Cooling Heat recovery
SW7-1 OFF ON OFF
SW7-2 OFF OFF ON
Table 14
Refrigerant Rotary Refrigerant Rotary Refrigerant Rotary Refrigerant Rotary Refrigerant Rotary
circuit Switch Setting circuit Switch Setting circuit Switch Setting circuit Switch Setting circuit Switch Setting
address OUTDOOR UNIT address OUTDOOR UNIT address OUTDOOR UNIT address OUTDOOR UNIT address OUTDOOR UNIT
SW9 SW8 SW9 SW8 SW9 SW8 SW9 SW8 SW9 SW8
0 0 0 20 1 4 40 2 8 60 3 12 80 5 0
1 0 1 21 1 5 41 2 9 61 3 13 81 5 1
2 0 2 22 1 6 42 2 10 62 3 14 82 5 2
3 0 3 23 1 7 43 2 11 63 3 15 83 5 3
4 0 4 24 1 8 44 2 12 64 4 0 84 5 4
5 0 5 25 1 9 45 2 13 65 4 1 85 5 5
6 0 6 26 1 10 46 2 14 66 4 2 86 5 6
7 0 7 27 1 11 47 2 15 67 4 3 87 5 7
8 0 8 28 1 12 48 3 0 68 4 4 88 5 8
9 0 9 29 1 13 49 3 1 69 4 5 89 5 9
10 0 10 30 1 14 50 3 2 70 4 6 90 5 10
11 0 11 31 1 15 51 3 3 71 4 7 91 5 11
12 0 12 32 2 0 52 3 4 72 4 8 92 5 12
13 0 13 33 2 1 53 3 5 73 4 9 93 5 13
14 0 14 34 2 2 54 3 6 74 4 10 94 5 14
15 0 15 35 2 3 55 3 7 75 4 11 95 5 15
16 1 0 36 2 4 56 3 8 76 4 12 96 6 0
17 1 1 37 2 5 57 3 9 77 4 13 97 6 1
18 1 2 38 2 6 58 3 10 78 4 14 98 6 2
19 1 3 39 2 7 59 3 11 79 4 15 99 6 3
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(3) Terminal resistor installationWhen connecting multiple outdoor units together with transmission cords, install the terminal resistor to terminal CN22 of oneoutdoor unit only.* When installing the signal amplifier (UTR-YRP❋), refer to the installation instruction sheet for the signal amplifier.
Fig. 35
CAUTION
Install the terminal resistor as specified.
If the terminal resistor is not installed as specified, the following malfunctions may occur.
1) When multiple terminal resistors are installed
The entire communication system may be damaged.
2) When no terminal resistor is installed
Communication errors may occur.
CN
22C
N2
ACIN
E1
SW1SW2SW8SW9 SW7 SW3
CN22
OUTDOOR BOARD
OUTDOOR UNIT
TERMINALRESISTOR
INDOOR UNIT
TERMINALRESISTOR
NO TERMINAL RESISTOR
TRANSMISSION CORD
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Fig. 36
Example If 4 indoor units are connected.
1 2
Indoor unit 0
3
1 2 3
1 2
Indoor unit 1
3 1 2
Indoor unit 2
3 1 2
Indoor unit 3
3
Remote controller
Bus wire
Remotecontrollercord
2. INDOOR UNIT SETTINGS
(1) Indoor unit addressesRotary switch (SW5) - - - Factory setting “0”When connecting multiple indoor units to one refrigerant system, set the address at SW5 in sequence from 0.
(2) Refrigerant circuit addressRotary switch (SW7) - - - Factory setting “0”Rotary switch (SW8) - - - Factory setting “0”In the case of multiple refrigerant systems, set SW7 and SW8 as shown in the Table 14 for each refrigerant system. Set to the samerefrigerant circuit address as the outdoor unit.
(3) Remote controller addressRotary switch (SW9) - - - Factory setting “0”When connecting multiple indoor units to one standard wired remote controller, set the address at SW9 in sequence from 0.
(4) Performance switchingSet the DIP switch (SW4) according to the model type of the indoor unit as shown below.
Table 16
Capacity 90 60 54 45 36 30 25·24 20 18 14 12 9 7
SW4-1 OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF
SW4-2 OFF ON ON OFF OFF ON ON OFF OFF ON ON OFF OFF
SW4-3 ON OFF OFF OFF OFF ON ON ON ON OFF OFF OFF OFF
SW4-4 ON ON ON ON ON OFF OFF OFF OFF OFF OFF OFF OFF
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(2) Standard wireless remote controller
• Press the remote control unit test run button while the air condi-tioner is running.
• At the end of test running, press the remote control unit start-stop button (Fig. 39).
Operation can be checked by lighting and flashing of the displaysection OPERATION and TIMER lamps.Perform judgement in accordance with the following.
• Test running
When the air conditioner is run by pressing the remote controlunit test run button, the OPERATION and TIMER lamps flashslowly at the same time.
TEST RUN buttonSTART
STOP
A B C D
START/STOP button
• When EE : EE blinks at the current time display, there is an error inside the air conditioner. If the SET TIME button ( ) and SETTEMP./DAY button ( ) are pressed simultaneously for more than three seconds, the self diagnosis check will start and the errorcontents will be displayed at the current time display. In addition, the remote controller address will be displayed below. When theoperation lamp lights, press the START/STOP button and after operation lamp goes off, perform the same operation (Fig. 38).
Fig. 38
7. TEST OPERATION
Supply power to the crankcase heater for 12 hours prior to the start of operation in the winter.The following is the procedure for the test operation.
1. TEST OPERATION USING CIRCUIT BOARD (OUTDOOR UNIT)
If the test operation is to be done for cooling operation, set DIP switch (SW1-1) to on. If the test operation is to be done for heating, setDIP switch (SW1-2) to on.
2. TEST OPERATION USING REMOTE CONTROLLER
(1) Standard wired remote controller• For test running, when the remote controller FAN CONTROL
button and MASTER CONTROL button are pressed simulta-neously for more than three seconds when the air conditioneris not running, the air conditioner starts and TEST is displayedon the remote controller display.However, the SET TEMP./DAY setting button does not function,but all other buttons, displays, and protection functions operate(Fig. 37).
Fig. 39
Fig. 37
MASTERCONTROL
FANCONTROL
TIMERMODE
TEMP./DAYSET TIME
CLOCK ADJUST
START/STOPSET DAY OFF
ZONE ENERGY SAVE
COOL
FANDRY
HEAT
AUTOAUTOCLOCKOFF
OFF
ON
ON
CF
NEXT DAY
DAYTIMER
NON STOPOFFONTIMERWEEKLY
ANTI FREEZE
CENTRAL
DAY OFFDEFROST TEST1 2
MASTERCONTROL
FANCONTROL
TIMERMODE
TEMP./DAYSET TIME
CLOCK ADJUST
START/STOPSET DAY OFF
ZONE ENERGY SAVE
COOL
FANDRY
HEAT
AUTOAUTOCLOCKOFF
OFF
ON
ON
CF
NEXT DAY
DAYTIMER
NON STOPOFFONTIMERWEEKLY
ANTI FREEZE
CENTRAL
DAY OFFDEFROST TEST1 2
MASTERCONTROL
FANCONTROL
TIMERMODE
TEMP./DAYSET TIME
CLOCK ADJUST
START/STOPSET DAY OFF
ZONE ENERGY SAVE
COOL
FANDRY
HEAT
AUTOAUTOCLOCKOFF
OFF
ON
ON
CF
NEXT DAY
DAYTIMER
NON STOPOFFONTIMERWEEKLY
ANTI FREEZE
CENTRAL
DAY OFFDEFROST TEST1 2
• To stop test running, press the START/STOP button.• For the operation method, refer to the operating manual and perform operation check.• Check that there are no abnormal sounds or vibration sounds during test running.
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8. AN ERROR DISPLAY
Operation can be checked by lighting and flashing of the LED lamps.Perform judgment in accordance with the following.
Table 17
Normal operating mode
LED 1Display Type
Not operatingCooling operationHeating operationCooling main operationHeating main operationSame performance operation
Compressor output STEP 0Compressor output STEP 1Compressor output STEP 2Compressor output STEP 3Compressor output STEP 4Compressor output STEP 5Compressor output STEP 6
Heat exchanger usage capacity STEP 0Heat exchanger usage capacity STEP 1Heat exchanger usage capacity STEP 2Heat exchanger usage capacity STEP 3Heat exchanger usage capacity STEP 4Heat exchanger usage capacity STEP 5Heat exchanger usage capacity STEP 6
Oil recoveryDefrostingTest operation
Medium pressure → Low pressure by-passHigh pressure → Low pressure by-pass
Under initialization of expansion value
LED 2
(1) (2) (3) (4) (5)
LED 3
(1) (2) (3) (4) (5) (6)
LED 4
(1) (2) (3) (4) (5) (6)
LED 5
(1) (2) (3)
LED 6
(1) (2)
: Lighted continuouslyDisplay Method : 0.5sec ON/0.5sec OFF flashing
( ) : Flashing times{
OFF
ON
LED 1
LED 2-6
OFF
ON
0.5 sec2 sec
0.5 sec
Operation display
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CAUTION
ERROR LED DISPLAY LAYOUT
LED
4
LED
1
LED
5
LED
2
LED
6
LED
3IC
Abnormal Mode
LED 1Display Type
Compressor 1 errorCompressor 2 errorCompressor 3 errorDischarge temperature 1 errorDischarge temperature 2 errorDischarge temperature 3 errorHigh-pressure errorLow-pressure errorPump down error
Discharge temperature thermistor 1 errorDischarge temperature thermistor 2 errorDischarge temperature thermistor 3 errorHeat exchange inlet thermistor 1 errorHeat exchange inlet thermistor 2 errorHeat exchange inlet thermistor 3 errorHeat exchange outlet thermistor 1 errorHeat exchange outlet thermistor 2 errorHeat exchange outlet thermistor 3 errorSuction temperature thermistor errorOutdoor temperature thermistor error
Discharge pressure sensor errorLiquid pressure sensor errorSuction pressure sensor errorOil sensor errorOil recovery error
Reverse phase blocker errorPower supply frequency abnormalModel information abnormalEEPROM access errorEEPROM deletion errorOutdoor unit circuit board error 1Outdoor unit circuit board error 2Transmission errorNode setting error
Indoor unit error
LED 2
(1) (2) (3) (4) (5) (6) (7) (8) (9)
LED 3
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)
LED 4
(1) (2) (3) (4) (7)
LED 5
(1) (2)
(3) (4) (6) (7) (8) (9)
LED 6
(1)
Display Method : 0.1sec ON/0.1sec OFF flashing: 0.3sec ON/0.3sec OFF flashing
( ) : Flashing times
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9. INFORMATION
Label
Main contents of label
Item Detail
1. Model name Model name
2. Serial number Serial number
3. Electric characteristics Phase, rated voltage, and frequency
4. Capacity Cooling/heating capacity
5. Current Electric current during cooling/heating operation
6. Input power Input during cooling/heating operation
7. Max. Over Current Maximum electric current
8. Max. pressure (HP/LP) Means pressure of High Pressure side/Low Pressure side
9. Refrigerant Refrigerant type and initial charging amount
10. Weight Product weight
11. Protection Protection level against dust and water
12. Manufacture year Manufacture year
Manufacturer13. Manufacturer FUJITSU GENERAL LIMITED
Address : 1116, Suenaga, Takatsu-ku, Kawasaki 213-8502, Japan
14. Origin Origin country
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