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TECHNICAL & SERVICE MANUAL
KHS1872 + CH1872
FILE NO.
KHS2472 + CH2472
Destination: North America
DC INVERTER SPLIT SYSTEM AIR CONDITIONER
Indoor Model No. Product Code No. Outdoor Model No. Product Code No.
KHS1872 1 852 099 85 CH1872 1 852 330 38
KHS2472 1 852 099 86 CH2472 1 852 330 39
Indoor Unit Outdoor Unit
KHS1872 CH1872
KHS2472
IMPORTANT
These air conditioners employ new
refrigerant R410A.
Pay special attention when
servicing the unit.
CH2472
REFERENCE NO. SM700656-05
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When Transporting Important! Be careful when picking up and moving the indoor and Please Read Before Starting outdoor units. Get a partner to help, and bend your knees This air conditioning system meets strict safety and operating when lifting to reduce strain on your back. Sharp edges or thin standards. As the installer or service person, it is an aluminum fins on the air conditioner can cut your fingers. important part of your job to install or service the system so it When Installing
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Table of Contents Page 1. OPERATING RANGE ................................................................................................................... 5 2. SPECIFICATIONS 2-1. Unit Specifications ............................................................................................................. 6 2-2. Major Component Specifications ....................................................................................... 10 2-3. Other Component Specifications ...............
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Page 10. CHECKING ELECTRICAL COMPONENTS 10-1. Measurement of Insulation Resistance ............................................................................... 52 10-2. Checking Continuity of Fuse on PCB Ass'y ......................................................................... 53 11. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT 11-1. Characteristics of New Refrigerant R410A ......................................................................... 54 11-2. Checklist be
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1. OPERATING RANGE Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp. Maximum 95 °F D.B. / 71 °F W.B. 115 °F D.B. Cooling Minimum 67 °F D.B. / 57 °F W.B. 0 °F D.B. Maximum 80 °F D.B. / 67 °F W.B. 75 °F D.B. / 65 °F W.B. Heating _ _ Minimum D.B. / W.B. 0 °F D.B. 5
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2. SPECIFICATIONS 2-1. Unit Specifications Indoor Unit KHS1872 Outdoor Unit CH1872 < 230V > Voltage Rating 230V Single-Phase 60Hz Cooling Heating Total Capacity BTU/h 17,500 ( 4,000 to 17,500 ) 20,400 ( 4,400 to 20,400 ) kW 5.15 ( 1.2 to 5.15 ) 6.0 ( 1.3 to 6.0 ) Sensible Capacity 13,100 - BTU/h Latent Capacity BTU/h 4,400 - 3 3 Air Circulation (High) ft /min (m /h) 524 (890) 541 (920) Moisture Removal (High) Pints/h 4.89 - Available Voltage Range V 187 to 253 Running Amperes A 7.0 ( 1.2 to 7
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Indoor Unit KHS1872 Outdoor Unit CH1872 < 208V > Voltage Rating 208V Single-Phase 60Hz Cooling Heating Total Capacity BTU/h 17,500 ( 4,000 to 17,500 ) 20,400 ( 4,400 to 20,400 ) kW 5.15 ( 1.2 to 5.15 ) 6.0 ( 1.3 to 6.0 ) Sensible Capacity 13,100 - BTU/h Latent Capacity BTU/h 4,400 - 3 3 Air Circulation (High) ft /min (m /h) 524 (890) 541 (920) Moisture Removal (High) Pints/h 4.89 - Available Voltage Range V 187 to 253 Running Amperes A 7.7 ( 1.2 to 7.7 ) 8.1 ( 1.3 to 8.1 ) Power Input W 1,500 (
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Indoor Unit KHS2472 Outdoor Unit CH2472 < 230V > Voltage Rating 230V Single-Phase 60Hz Cooling Heating Total Capacity BTU/h 24,200 ( 4,000 to 24,200 ) 29,000 ( 4,400 to 29,000 ) kW 7.1 ( 1.2 to 7.1 ) 8.5 ( 1.3 to 8.5 ) Sensible Capacity 14,800 - BTU/h Latent Capacity BTU/h 9,400 - 3 3 Air Circulation (High) ft /min (m /h) 600 (1,020) 653 (1,110) Moisture Removal (High) Pints/h 4.89 - Available Voltage Range V 187 to 253 Running Amperes A 10.8 ( 1.3 to 10.8 ) 12.0 ( 1.3 to 12.0 ) Power Input W 2
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Indoor Unit KHS2472 Outdoor Unit CH2472 < 208V > Voltage Rating 208V Single-Phase 60Hz Cooling Heating Total Capacity BTU/h 24,200 ( 4,000 to 24,200 ) 29,000 ( 4,400 to 29,000 ) kW 7.1 ( 1.2 to 7.1 ) 8.5 ( 1.3 to 8.5 ) Sensible Capacity 14,800 - BTU/h Latent Capacity BTU/h 9,400 - 3 3 Air Circulation (High) ft /min (m /h) 600 (1,020) 653 (1,110) Moisture Removal (High) Pints/h 4.89 - Available Voltage Range V 187 to 253 Running Amperes A 12.1 ( 1.3 to 12.1 ) 13.5 ( 1.3 to 13.5 ) Power Input W 2
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2-2. Major Component Specifications 2-2-1. Indoor Unit Indoor Unit KHS1872 Control PCB Part No. CB-KHS1872 Controls Microprocessor Control Circuit Fuse 250V 3A Remote Control Unit RCS-4HVPIS4U Fan Type Cross-Flow Q'ty ... Dia. and Length inch (mm) 1 ... D3-11/16 / L33-9/32 (D94/L845) Fan Motor Type DC Motor Model ... Q'ty SIC-39CVL-D847-2-A ... 1 No. of Poles 8 Rough Measure RPM (Cool / Heat) 1,250 / 1,300 Nominal Output W 30 Coil Resistance Ohm - (Ambient Temp. 68 °F (20 °C)) Safety Device
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Indoor Unit KHS2472 Control PCB Part No. CB-KHS2472 Controls Microprocessor Control Circuit Fuse 250V 3A Remote Control Unit RCS-4HVPIS4U Fan Type Cross-Flow Q'ty ... Dia. and Length inch (mm) 1 ... D3-11/16 / L33-9/32 (D94/L845) Fan Motor Type DC Motor Model ... Q'ty SIC-39CVL-D847-2-A ... 1 No. of Poles 8 Rough Measure RPM (Cool / Heat) 1,500 / 1,550 Nominal Output W 30 Coil Resistance Ohm - (Ambient Temp. 68 °F (20 °C)) Safety Device Type Internal Controller Over-Current Protection Yes Over
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2-2-2. Outdoor Unit Outdoor Unit CH1872 Control PCB Part No. CB-CH1872 Controls Microprocessor Control Circuit Fuse 250V 25A Compressor Type DC Twin Rotary (Hermetic) Compressor Model / Nominal Output C-6RVN93H0M / 1,050W Compressor Oil ... Amount Pints (cc) FV50S ... 0.74 (350) Coil Resistance (Ambient Temp. 68 °F (20 °C)) Ohm R - S : 0.482 S - T : 0.482 T - R : 0.482 Safety Device CT (Peak current cut-off control) Yes Compressor Discharge Temp. Control Yes Operation cut-off control in a
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Outdoor Unit CH2472 Control PCB Part No. CB-CH2472 Controls Microprocessor Control Circuit Fuse 250V 25A Compressor Type DC Twin Rotary (Hermetic) Compressor Model / Nominal Output G8T265FU1JW / 2,410W Compressor Oil ... Amount Pints (cc) FV50S ... 1.49 (700) Coil Resistance (Ambient Temp. 68 °F (20 °C)) Ohm U - V : 0.36 V - W : 0.36 W - U : 0.36 Safety Device CT (Peak current cut-off control) Yes Compressor Discharge Temp. Control Yes Operation cut-off control in abnormal ambient Temp. Ye
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2-3. Other Component Specifications Indoor Unit KHS1872 KHS2472 Outdoor Unit CH1872 CH2472 • Indoor heat exchanger sensor (Model:PTM-D51H-S3-2 TH1) • Indoor air temp sensor • Compressor temp sensor (Model:PTM-D51H-S3-2 TH2) (Model:TKS293B) 10 200 9 180 8 160 7 140 6 120 5 100 4 80 3 60 2 40 1 20 0 0 50 59 68 77 86 95 104 32 50 68 86 104 122 140 158 176 194 (10) (15) (20) (25) (30) (35) (40) (0) (10) (20) (30) (40) (50) (60) (70) (80) (90) Temperature °F (°C) Temperature °F (°C) •
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3. DIMENSIONAL DATA Indoor Unit KHS1872 KHS2472 Unit: inch(mm) 15
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Outdoor Unit CH1872 23-15/16 5-11/32 15/32 11-17/32 Wide tube service valve dia.1/2" (12.70) 34-21/32(880) 2-17/32 Narrow tube service valve dia.1/4" (6.35) 3/32 1-13/16 5-23/32 2-13/32 Unit: inch(mm) 16 4-ID:15/16 ID:23/32 1-3/8 23/32 11-7/32(285) 26-3/8(670) 12-7/32 13-5/32 4-3/8 2-5/32 6-17/32
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Outdoor Unit CH2472 23-15/16 5-11/32 15/32 11-17/32 Narrow tube service valve dia.1/4" (6.35) 35-7/16(900) 2-15/16 Wide tube service valve dia.5/8" (15.88) 2-1/32 4-1/2 1-21/32 2-7/8 Unit: inch(mm) 17 5-ID:15/16 ID:23/32 1-3/8 23/32 12-19/32(320) 29-1/8(740) 13-19/32 14-17/32 5-29/32 4-7/16
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4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram Indoor Unit KHS1872 Outdoor Unit CH1872 KHS2472 CH2472 Indoor unit Outdoor unit Accumulator Wide tube service Wide tube valve High pressure switch Muffler *1 H.P. 4-way valve Capillary tube for split flow Electric Narrow expansion tube valve service Narrow tube M valve Cooling cycle (Defrosting cycle) Strainer O.D. 1/4" Heating cycle (6.35 mm) *1 O.D.1/2"(12.7 mm) ......... 1872 class O.D.5/8"(15.88 mm) ......... 2472 class Insu
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5. PERFORMANCE DATA 5-1. Temperature Charts Indoor Unit KHS1872 Outdoor Unit CH1872 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V) (1) Low pressure performance chart 174 (1.2) Lo fan Hi Fan 159 (1.1) 145 (1.0) 131 (0.9) 117 (0.8) 104 (0.7) 90 (0.6) 76 (0.5) -4 5 14 23 32 41 50 59 68 77 86 95 104 (-20) (-15) (-10) (-5) (0) (5) (10) (15) (20) (25) (30) (35) (40) Outdoor inlet air D.B. temp.°F(°C) (2) Operating current performance chart 8 Lo fan Hi Fan 7 6 5 4 3 2
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Indoor Unit KHS1872 Outdoor Unit CH1872 Heating Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V) (1) High pressure performance chart 494 (3.4) 421 (2.9) 348 (2.4) 275 (1.9) 23 32 41 50 59 68 77 (–5) (0) (5) (10) (15) (20) (25) Outdoor inlet air D.B. temp. °F(°C) (2) Operating current performance chart 11 10 9 8 7 6 5 23 32 41 50 59 68 77 (–5) (0) (5) (10) (15) (20) (25) Outdoor inlet air D.B. temp. °F(°C) (3) Indoor discharge air performance chart
