Friedrich US12C10 User Manual

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www.sylvane.com 1-800-934-9194

Uni- FitR

Thru-the-WallSeries

Service and Parts

Manual

Thru-the-WallSeries

115 Volts US08C10 US10C10 US12C10

230 Volts US10C30 US12C30 US14C30

Unifit Cool Svc Parts 2010 (05/10)

Unifit. Cool (03/07)

www.sylvane.com 1-800-934-9194

CONTENTS

1. PREFACE

 

1.1 SAFETY PRECAUTIONS ...............................

2

1.2 INSULATION RESISTANCE TEST.................

2

1.3 SPECIFICATIONS ..........................................

3~8

1.4 FEATURES .....................................................

9

1.5 CONTROL LOCATIONS .................................

9

2. DISASSEMBLY INSTRUCTIONS

 

2.1 MECHANICAL PARTS....................................

10

2.1.1 FRONT GRILLE .....................................

10

2.1.2 CABINET................................................

10

2.1.3 CONTROL BOX .....................................

10

2.2 AIR HANDLING PARTS..................................

11

2.2.1 ORIFICE, HEATER ASSY AND TURBO FAN .........

11

2.2.2 FAN ........................................................

11

2.2.3 SHROUD................................................

12

2.3 ELECTRICAL PARTS .....................................

12

2.3.1 MOTOR..................................................

12

2.3.2 COMPRESSOR .....................................

12

2.3.3 CAPACITOR ..........................................

12

2.3.4 POWER CORD ......................................

13

2.3.5 THERMISTOR .......................................

13

2.4 REFRIGERATION CYCLE.................................

14

2.4.1 CONDENSER ......................................

14

2.4.2 EVAPORATOR ....................................

14

2.4.3 CAPILLARY TUBE...............................

14

3. TROUBLESHOOTING GUIDE

 

3.1 OUTSIDE DIMENSIONS...............................

17

3.2 PIPING SYSTEM ..........................................

17

3.3 TROUBLESHOOTING GUIDE......................

18

4. SCHEMATIC DIAGRAM

 

4.1 CIRCUIT DIAGRAM ......................................

23

5. EXPLODED VIEW..................................

24

6. REPLACEMENT PARTS LIST .......

25~30

1. PREFACE

This SERVICE MANUAL provides various service information, including the mechanical and electrical parts etc. This room air conditioner was manufactured and assembled under a strict quality control system. The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.

1.1 SAFETY PRECAUTIONS

1.2 INSULATION RESISTANCE TEST

1.When servicing the unit, turn off the air conditioner and unplug the power cord.

2.Observe the original lead dress.

If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

3.After servicing the unit, make an insulation resistance test to protect the customer from being exposed to shock hazards.

1.Unplug the power cord and connect a jumper between 2 pins (black and white).

2.The grounding conductor (green or green & yellow) is to be open.

3.Measure the resistance value with an ohm meter between the jumpered lead and each exposed metallic part on the equipment.

4.The value should be over 1MΩ .

—2—

www.sylvane.com 1-800-934-9194

1.3 SPECIFICATIONS

 

 

MODELS

US08C10

REMARK

ITEMS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER SUPPLY

 

 

 

1Ø, 115V, 60Hz

 

 

 

 

 

 

COOLING CAPACITY

(Btu/h)

8,000

 

 

 

 

 

 

 

INPUT

 

(W)

830

 

 

 

 

 

 

RUNNING CURRENT

(A)

7.5

 

 

 

 

 

 

 

E.E.R

 

(Btu/w.h)

9.6

 

 

 

 

 

REFRIGERANT (R410A) CHARGE

400g(14.1OZ)

 

 

 

 

 

 

OPERATING

INDOOR (°F)

80(DB) 67(WB)

 

 

 

 

 

 

TEMPERATURE

OUTDOOR (°F)

95(DB) 75(WB)

 

 

 

 

 

 

 

EVAPORATOR

 

 

 

2 ROW 12STACKS

 

 

 

 

 

 

 

CONDENSER

 

 

 

Ø5 2ROW 18STACKS, L-BENDINGTYPE

LOUVERED-FINTYPE

 

 

 

 

 

 

FAN, INDOOR

 

 

 

TURBO FAN

 

 

 

 

 

 

 

FAN, OUTDOOR

 

 

 

PROPELLER TYPE FAN WITH SLINGER-RING

 

 

 

 

 

FAN SPEEDS, FAN/COOLING

3/3

 

 

 

 

 

 

 

FAN MOTOR

 

 

 

6 POLES

 

 

 

 

 

OPERATION CONTROL

ELECTRIC

 

 

 

 

 

ROOM TEMP. CONTROL

THERMISTOR

 

 

 

 

 

AIR DIRECTION CONTROL

VERTICAL LOUVER(RIGHT & LEFT)

 

 

 

 

 

 

 

 

 

 

 

HORIZONTAL LOUVER(UP & DOWN)

 

 

 

 

 

 

 

CONSTRUCTION

 

 

 

TOP-DOWN

 

 

 

 

 

 

PROTECTOR

COMPRESSOR

EXTERNAL OVERLOAD PROTECTOR

 

 

 

 

 

 

 

FAN MOTOR

INTERNAL THERMAL PROTECTOR

 

 

 

 

 

 

 

POWER CORD

 

 

 

3WIRES WITH GROUNDING

 

 

 

 

 

 

 

 

 

 

 

ATTACHMENT PLUG(CORD-CONNECTEDTYPE, LCDI)

 

 

 

 

 

 

 

DRAIN SYSTEM

 

 

 

SPLASHED BY FAN SLINGER

 

 

 

 

 

 

NET WEIGHT

(lbs/kg)

73/33

 

 

 

 

 

 

 

DIMENSION

 

 

(inch)

24 x 1413/32 x 203/32

 

(W x H x D)

 

 

(mm)

610 x 366 x 499

 

 

 

 

 

 

SLEEVE DIMESION

 

(inch)

25 7/8 x 1517/32 x 1623/32

OPTIONAL

(W x H x D)

 

 

(mm)

656 x 394 x 425

PART

 

 

 

 

 

 

 

 

 

SLEEVE DEPTH

 

 

(inch)

20 1/2

 

WITH FRONT GRILLE

 

(mm)

521

 

 

 

 

 

 

 

—3—

www.sylvane.com 1-800-934-9194

1.3 SPECIFICATIONS

 

 

MODELS

US10C10

REMARK

ITEMS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER SUPPLY

 

 

 

1Ø, 115V, 60Hz

 

 

 

 

 

 

COOLING CAPACITY

(Btu/h)

9,800

 

 

 

 

 

 

 

INPUT

 

(W)

1,040

 

 

 

 

 

 

RUNNING CURRENT

(A)

9.6

 

 

 

 

 

 

 

E.E.R

 

(Btu/w.h)

9.4

 

 

 

 

 

REFRIGERANT (R-410A)CHARGE

445g(15.7OZ)

 

 

 

 

 

 

OPERATING

INDOOR (°F)

80 (DB) 67(WB)

 

 

 

 

 

 

TEMPERATURE

OUTDOOR (°F)

95(DB) 75 (WB)

 

 

 

 

 

 

 

EVAPORATOR

 

 

 

2 ROW 12STACKS

 

 

 

 

 

 

 

CONDENSER

 

 

 

Ø5.0 3ROW 18STACKS, L-BENDINGTYPE

LOUVERED-FINTYPE

 

 

 

 

 

 

FAN, INDOOR

 

 

 

TURBO FAN

 

 

 

 

 

 

 

FAN, OUTDOOR

 

 

 

PROPELLER TYPE FAN WITH SLINGER-RING

 

 

 

 

 

FAN SPEEDS, FAN/COOLING

3/3

 

 

 

 

 

 

 

FAN MOTOR

 

 

 

6 POLES

 

 

 

 

 

OPERATION CONTROL

ELECTRIC

 

 

 

 

 

ROOM TEMP. CONTROL

THERMISTOR

 

 

 

 

 

AIR DIRECTION CONTROL

VERTICAL LOUVER(RIGHT & LEFT)

 

 

 

 

 

 

 

 

 

 

 

HORIZONTAL LOUVER(UP & DOWN)

 

 

 

 

 

 

 

CONSTRUCTION

 

 

 

TOP-DOWN

 

 

 

 

 

 

PROTECTOR

COMPRESSOR

EXTERNAL OVERLOAD PROTECTOR

 

 

 

 

 

 

 

FAN MOTOR

INTERNAL THERMAL PROTECTOR

 

 

 

 

 

 

 

POWER CORD

 

 

 

3WIRES WITH GROUNDING

 

 

 

 

 

 

 

 

 

 

 

ATTACHMENT PLUG(CORD-CONNECTEDTYPE, LCDI)

 

 

 

 

 

 

 

DRAIN SYSTEM

 

 

 

SPLASHED BY FAN SLINGER

 

 

 

 

 

 

NET WEIGHT

(lbs/kg)

73/33

 

 

 

 

 

 

 

DIMENSION

 

 

(inch)

24 x 1413/32 x 203/32

 

(W x H x D)

 

 

(mm)

610 x 366 x 499

 

 

 

 

 

 

SLEEVE DIMESION

 

(inch)

25 7/8 x 1517/32 x 1623/32

OPTIONAL

(W x H x D)

 

 

(mm)

656 x 394 x 425

PART

 

 

 

 

 

 

 

 

 

SLEEVE DEPTH

 

 

(inch)

20 1/2

 

WITH FRONT GRILLE

 

(mm)

521

 

 

 

 

 

 

 

—4—

www.sylvane.com 1-800-934-9194

 

 

MODELS

US10C30

REMARK

ITEMS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER SUPPLY

 

 

 

1Ø, 230V/208V, 60Hz

 

 

 

 

 

 

COOLING CAPACITY

(Btu/h)

10,000/9,800

 

 

 

 

 

 

 

INPUT

 

(W)

1060/1040

 

 

 

 

 

 

RUNNING CURRENT

(A)

4.7/5.2

 

 

 

 

 

 

 

E.E.R

 

(Btu/w.h)

9.4/9.4

 

 

 

 

 

REFRIGERANT (R410A) CHARGE

460g(16.2 OZ)

 

 

 

 

 

 

OPERATING

INDOOR (°F)

80(DB) 67(WB)

 

 

 

 

 

 

TEMPERATURE

OUTDOOR (°F)

95(DB) 75(WB)

 

 

 

 

 

 

 

EVAPORATOR

 

 

 

2 ROW 12STACKS

 

 

 

 

 

 

 

CONDENSER

 

 

 

Ø 5.0 3ROW 18STACKS, L-BENDINGTYPE

LOUVERED-FINTYPE

 

 

 

 

 

 

FAN, INDOOR

 

 

 

TURBO FAN

 

 

 

 

 

 

 

FAN, OUTDOOR

 

 

 

PROPELLER TYPE FAN WITH SLINGER-RING

 

 

 

 

 

FAN SPEEDS, FAN/COOLING

3/3

 

 

 

 

 

 

 

FAN MOTOR

 

 

 

6 POLES

 

 

 

 

 

OPERATION CONTROL

ELECTRIC

 

 

 

 

 

ROOM TEMP. CONTROL

THERMISTOR

 

 

 

 

 

AIR DIRECTION CONTROL

VERTICAL LOUVER(RIGHT & LEFT)

 

 

 

 

 

 

 

 

 

 

 

HORIZONTAL LOUVER(UP & DOWN)

 

 

 

 

 

 

 

CONSTRUCTION

 

 

 

TOP-DOWN

 

 

 

 

 

 

PROTECTOR

COMPRESSOR

EXTERNAL OVERLOAD PROTECTOR

 

 

 

 

 

 

 

FAN MOTOR

INTERNAL THERMAL PROTECTOR

 

 

 

 

 

 

 

POWER CORD

 

 

 

3WIRES WITH GROUNDING

 

 

 

 

 

 

 

 

 

 

 

ATTACHMENT PLUG(CORD-CONNECTEDTYPE, LCDI)

 

 

 

 

 

 

 

DRAIN SYSTEM

 

 

 

SPLASHED BY FAN SLINGER

 

 

 

 

 

 

NET WEIGHT

(lbs/kg)

73/33

 

 

 

 

 

 

 

DIMENSION

 

 

(inch)

24 x 1413/32 x 203/32

 

(W x H x D)

 

 

(mm)

610 x 366 x 499

 

 

 

 

 

 

SLEEVE DIMESION

 

(inch)

25 7/8 x 1517/32 x 1623/32

OPTIONAL

(W x H x D)

 

 

(mm)

656 x 394 x 425

PART

 

 

 

 

 

 

 

 

 

SLEEVE DEPTH

 

 

(inch)

20 1/2

 

WITH FRONT GRILLE

 

(mm)

521

 

 

 

 

 

 

 

—5—

www.sylvane.com 1-800-934-9194

 

 

MODELS

US12C10

REMARK

ITEMS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER SUPPLY

 

 

 

1Ø, 230V/208V, 60Hz

 

 

 

 

 

 

COOLING CAPACITY

(Btu/h)

11500/11200

 

 

 

 

 

 

 

INPUT

 

(W)

1220/1190

 

 

 

 

 

 

RUNNING CURRENT

(A)

5.6/6.0

 

 

 

 

 

 

 

E.E.R

 

(Btu/w.h)

9.4/9.4

 

 

 

 

 

REFRIGERANT (R-410A)CHARGE

525g(18.0 OZ)

 

 

 

 

 

 

OPERATING

INDOOR (°F)

80(DB) 67(WB)

 

 

 

 

 

 

TEMPERATURE

OUTDOOR (°F)

95(DB) 75(WB)

 

 

 

 

 

 

 

EVAPORATOR

 

 

 

2 ROW 12STACKS

 

 

 

 

 

 

 

CONDENSER

 

 

 

3ROW 18STACKS, L-BENDINGTYPE, 1 ROW

LOUVERED-FINTYPE

 

 

 

 

 

 

FAN, INDOOR

 

 

 

TURBO FAN

 

 

 

 

 

 

 

FAN, OUTDOOR

 

 

 

PROPELLER TYPE FAN WITH SLINGER-RING

 

 

 

 

 

FAN SPEEDS, FAN/COOLING

3/3

 

 

 

 

 

 

 

FAN MOTOR

 

 

 

6 POLES

 

 

 

 

 

OPERATION CONTROL

ELECTRIC

 

 

 

 

 

ROOM TEMP. CONTROL

THERMISTOR

 

 

 

 

 

AIR DIRECTION CONTROL

VERTICAL LOUVER(RIGHT & LEFT)

 

 

 

 

 

 

 

 

 

 

 

HORIZONTAL LOUVER(UP & DOWN)

 

 

 

 

 

 

 

CONSTRUCTION

 

 

 

TOP-DOWN

 

 

 

 

 

 

PROTECTOR

COMPRESSOR

EXTERNAL OVERLOAD PROTECTOR

 

 

 

 

 

 

 

FAN MOTOR

INTERNAL THERMAL PROTECTOR

 

 

 

 

 

 

 

POWER CORD

 

 

 

3WIRES WITH GROUNDING

 

 

 

 

 

 

 

 

 

 

 

ATTACHMENT PLUG(CORD-CONNECTEDTYPE, LCDI)

 

 

 

 

 

 

 

DRAIN SYSTEM

 

 

 

SPLASHED BY FAN SLINGER

 

 

 

 

 

 

NET WEIGHT

(lbs/kg)

73/33

 

 

 

 

 

 

 

DIMENSION

 

 

(inch)

24 x 1413/32 x 203/32

 

(W x H x D)

 

 

(mm)

610 x 366 x 499

 

 

 

 

 

 

SLEEVE DIMESION

 

(inch)

25 7/8 x 1517/32 x 1623/32

OPTIONAL

(W x H x D)

 

 

(mm)

656 x 394 x 425

PART

 

 

 

 

 

 

 

 

 

SLEEVE DEPTH

 

 

(inch)

20 1/2

 

WITH FRONT GRILLE

 

(mm)

521

 

 

 

 

 

 

 

—6—

www.sylvane.com 1-800-934-9194

 

 

MODELS

US12C30

REMARK

ITEMS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER SUPPLY

 

 

 

1Ø, 230/208V, 60Hz

 

 

 

 

 

 

COOLING CAPACITY

(Btu/h)

11,500/11,200

 

 

 

 

 

 

 

INPUT

 

(W)

1,220/1,190

 

 

 

 

 

 

RUNNING CURRENT

(A)

5.6/6.0

 

 

 

 

 

 

 

E.E.R

 

(Btu/w.h)

9.4/9.4

 

 

 

 

 

REFRIGERANT (R-410A)CHARGE

510g(18.0OZ)

 

 

 

 

 

 

OPERATING

INDOOR (°F)

80(DB) 67(WB)

 

TEMPERATURE

OUTDOOR (°F)

95(DB) 75(WB)

 

EVAPORATOR

 

 

 

2 ROW 12STACKS

 

 

 

 

 

 

 

CONDENSER

 

 

 

3ROW 18STACKS, L-BENDINGTYPE 1 ROW

LOUVERED-FINTYPE

FAN, INDOOR

 

 

 

TURBO FAN

 

 

 

 

 

 

 

FAN, OUTDOOR

 

 

 

PROPELLER TYPE FAN WITH SLINGER-RING

 

 

 

 

 

FAN SPEEDS, FAN/COOLING

3/3

 

 

 

 

 

 

 

FAN MOTOR

 

 

 

6 POLES

 

 

 

 

 

OPERATION CONTROL

ELECTRIC

 

 

 

 

 

ROOM TEMP. CONTROL

THERMISTOR

 

 

 

 

 

AIR DIRECTION CONTROL

VERTICAL LOUVER(RIGHT & LEFT)

 

 

 

 

 

 

 

 

 

 

 

HORIZONTAL LOUVER(UP & DOWN)

 

 

 

 

 

 

 

CONSTRUCTION

 

 

 

TOP-DOWN

 

 

 

 

 

 

PROTECTOR

COMPRESSOR

EXTERNAL OVERLOAD PROTECTOR

 

 

 

 

 

 

 

FAN MOTOR

INTERNAL THERMAL PROTECTOR

 

 

 

 

 

 

 

POWER CORD

 

 

 

3WIRES WITH GROUNDING

 

 

 

 

 

 

 

 

 

 

 

ATTACHMENT PLUG(CORD-CONNECTEDTYPE, LCDI)

 

 

 

 

 

 

 

DRAIN SYSTEM

 

 

 

SPLASHED BY FAN SLINGER

 

 

 

 

 

 

NET WEIGHT

(lbs/kg)

73/33

 

 

 

 

 

 

 

DIMENSION

 

 

(inch)

24 x 1413/32 x 203/32

 

(W x H x D)

 

 

(mm)

610 x 366 x 499

 

 

 

 

 

 

SLEEVE DIMESION

 

(inch)

25 7/8 x 1517/32 x 1623/32

OPTIONAL

(W x H x D)

 

 

(mm)

656 x 394 x 425

PART

 

 

 

 

 

 

 

 

 

SLEEVE DEPTH

 

 

(inch)

20 1/2

 

WITH FRONT GRILLE

 

(mm)

521

 

 

 

 

 

 

 

—7—

www.sylvane.com 1-800-934-9194

 

 

MODELS

US14C30

REMARK

ITEMS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER SUPPLY

 

 

 

1Ø, 230/208V, 60Hz

 

 

 

 

 

 

COOLING CAPACITY

(Btu/h)

13,000/12,600

 

 

 

 

 

 

 

INPUT

 

(W)

1,530/1,480

 

 

 

 

 

 

RUNNING CURRENT

(A)

7.0/7.5

 

 

 

 

 

 

 

E.E.R

 

(Btu/w.h)

8.5/8.5

 

 

 

 

 

REFRIGERANT (R-410A)CHARGE

510g(18.0OZ)

 

 

 

 

 

 

OPERATING

INDOOR (°F)

80(DB) 67(WB)

 

TEMPERATURE

OUTDOOR (°F)

95(DB) 75(WB)

 

EVAPORATOR

 

 

 

2 ROW 12STACKS

 

 

 

 

 

 

 

CONDENSER

 

 

 

3ROW 18STACKS, L-BENDINGTYPE,1ROW

LOUVERED-FINTYPE

 

 

 

 

 

 

FAN, INDOOR

 

 

 

TURBO FAN

 

 

 

 

 

 

 

FAN, OUTDOOR

 

 

 

PROPELLER TYPE FAN WITH SLINGER-RING

 

 

 

 

 

FAN SPEEDS, FAN/COOLING

3/3

 

 

 

 

 

 

 

FAN MOTOR

 

 

 

6 POLES

 

 

 

 

 

OPERATION CONTROL

ELECTRIC

 

 

 

 

 

ROOM TEMP. CONTROL

THERMISTOR

 

 

 

 

 

AIR DIRECTION CONTROL

VERTICAL LOUVER(RIGHT & LEFT)

 

 

 

 

 

 

 

 

 

 

 

HORIZONTAL LOUVER(UP & DOWN)

 

 

 

 

 

 

 

CONSTRUCTION

 

 

 

TOP-DOWN

 

 

 

 

 

 

PROTECTOR

COMPRESSOR

EXTERNAL OVERLOAD PROTECTOR

 

 

 

 

 

 

 

FAN MOTOR

INTERNAL THERMAL PROTECTOR

 

 

 

 

 

 

 

POWER CORD

 

 

 

3WIRES WITH GROUNDING

 

 

 

 

 

 

 

 

 

 

 

ATTACHMENT PLUG(CORD-CONNECTEDTYPE, LCDI)

 

 

 

 

 

 

 

DRAIN SYSTEM

 

 

 

SPLASHED BY FAN SLINGER

 

 

 

 

 

 

NET WEIGHT

(lbs/kg)

73/33

 

 

 

 

 

 

 

DIMENSION

 

 

(inch)

24 x 1413/32 x 203/32

 

(W x H x D)

 

 

(mm)

610 x 366 x 499

 

 

 

 

 

 

SLEEVE DIMESION

 

(inch)

25 7/8 x 1517/32 x 1623/32

OPTIONAL

(W x H x D)

 

 

(mm)

656 x 394 x 425

PART

 

 

 

 

 

 

 

 

 

SLEEVE DEPTH

 

 

(inch)

20 1/2

 

WITH FRONT GRILLE

 

(mm)

521

 

 

 

 

 

 

 

—8—

www.sylvane.com 1-800-934-9194

1.4 FEATURES

• Designed for cooling only.

• Built in adjustable THERMOSTAT.

• Powerful and quiet.

• Washable one-touchfilter.

• Slide out chassis for the simple installation and service.

• Compact size.

1.5 CONTROL LOCATIONS

1.5.1 COOLING ONLY MODEL

• OPERATION

• VENTILATION

Push the lever to the "CLOSE" position to cool, heat or recirculate room air only. Pull the lever to the "OPEN" position to exhaust smoke or stale air from the room. This feature is best used in conjunction with the FAN ONLY position.

CAUTION

When the air conditioner has been operating in the

PULL OPEN / PUSH CLOSE

cooling and is turned off or set to the fan only position,

 

wait at least 3 minutes before resetting to the cooling

 

operation again.

 

—9—

www.sylvane.com 1-800-934-9194

2. DISASSEMBLY INSTRUCTIONS

Prior to disassembling the unit, make sure that the POWER is off and the power cord is unplugged from the wall receptacle.

2.1 MECHANICAL PARTS

2.1.1 FRONT GRILLE

1. Open the inlet grille downward.

2. Remove the screw which fastens the front grille.

3. Pull the front grille from the right side.

4. Remove the front grille. (See Fig. 1)

5.Re-installthe component by referring to the removal procedure.

Figure 1

2.1.2 CABINET

1.After disassembling the FRONT GRILLE, remove the 6 screws which fasten the cabinet at the both sides and the top. (See Fig. 2)

Keep these for later use.

2.1.3 CONTROL BOX

1.Remove the front grille. (Refer to section 2.1.1)

2.Remove the screw which fasten the control box. (See Fig. 3)

3.Pull the control box from the barrier.(See Fig.3)

4.Discharge the capacitor by placing a 20,000 ohm resistor across the capacitor terminals.

5.Disconnect two wire housings in the control box.

6.Pull the control box forward completely.

7.Re-installthe components by referring to the removal procedure. (See Fig. 3)

(Refer to the circuit diagram found on page 19 in this manual and on the control box.)

Figure 2

Figure 3

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