Models:
A4LC10B/BR
A4LC15B/BR
A4LC20B/BR
A4LC25B/BR
A4LC30C/CR
A4LC40C/CR
A4LC50C/CR
Manual No: TMA-A4LC-CR-1250
R407C Air-Cooled
Split Systems
PAGE
1. INTRODUCTION TO REFRIGERANT R407C 1
2. SPECIFICATIONS 2
3. OUTLINES AND DIMENSIONS 3 - 4
4. WIRING DIAGRAMS 5 - 8
5. SPECIAL PRECAUTIONS 9 – 10
6. INSTALLATION 11 – 15
7. SERVICING AND MAINTENANCE 16 – 17
8. TROUBLESHOOTING 18 - 23
9. PARTS LIST 24 – 27
CONTENTS
1
ENVIRONMENTAL FRIENDLY
The Montreal Protocol regulation calls for the phase-out of HCFCs by the year 2030 to prevent the ozone
layer from further depletion. R407C is an environment friendly refrigerant to replace R22. The operating
characteristics of R407C system bears close similarity to that of R22. R407C thermophysical properties
such as pressure-temperature behavior, and heat-transfer characteristic are somewhat similar to the
properties of R22.
Physical Property R407C R22
Molecular Wt (g/mol) 86.2 86.5
Vapor Density (kg/m3) 42.0 44.2
Liquid Density (kg/m3) 1134 1195
Boiling Point (°C)
-37.1 to -44.3 -40.8
Latent Heat Vap (kJ/kg) 245 234
Ozone Depletion Potential 0.00 0.05
Global Warming Potential 1600 1700
R407C CHARACTERISTICS
R407C is a ternary mixture of R32, R125, and R134a with weight composition of 23%, 25% and 52%
respectively. These three components have different vapor pressure and boiling points. R407C liquid and
vapor components have different compositions when the fluid evaporates or condenses. This gives rise
to a temperature glide where the bubble point and dew point are of different temperatures. The effect of
glide in heat exchangers is that as the refrigerant mixture flows through the tubing at constant pressure,
the evaporating temperature will change as the composition of the liquid and vapor phases change.
Typically, the glide for R407C is about 5°C to 10°C. The extend of temperature glide actually varies with
the pressure and composition of components present in the mixture during the leak.
The main concerns for R407C is its zeotropic nature. When leak occurs and only vapor leaks out, the
composition of the refrigerant mixture left in the system will change. Especially, when the system is idle,
R32 being the lightest component will leak out more than the other components. What remains in the
system will be of different composition. If the leaked system is subsequently top-up with R407C, the
mixture in the system will varies from the original composition percentage ratio.
This composition shift will slightly affect the system performance. However, study has shown that after a
series of repeated leaks and top-ups, the system capacity drops up to 6%.
Another concern for R407C system is the lubricant used for its compressor. Like all HFC refrigerants,
R407C uses polyol ester oil (POE) as its lubricant. This hydroscopic oil is prone to moisture
contamination. Extra precaution must be taken not to expose the R407C system too long to moist air; as
the oil will soak up the moisture into the system.
1. INTRODUCTION TO REFRIGERANT R407C
2
COOLING ONLY
HEAT PUMP
1) ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.
2) ALL UNITS ARE BEING TESTED AND COMPLY TO ARI 210/240-89.
3) NOMINAL COOLING AND HEATING CAPACITY ARE BASED ON THE CONDITIONS BELOW :
a) COOLING – 26.7°C DB / 19.4°C WB INDOOR AND 35°C DB OUTDOOR.
b) HEATING – 21.1°C DB / 15.6°C WB INDOOR AND 8.3°C DB / 6.1°C WB OUTDOOR.
2. SPECIFICATIONS
MODEL OUTDOOR UNIT A4LC10B A4LC15B A4LC 20B A4LC 25B A4LC30C A4LC40C A4LC50C
NOMINAL kcal/h 2,268 2,772 4,612 5,292 7,560 9,576 12,600
COOLING W 2,637 3,223 5,363 6,155 8,792 11,134 14,650
CAPACITY Btu/h 9,000 11,000 18,300 21,000 30,000 38,000 50,000
REFRIGERANT / CONTROL
POWER SOURCE V/Ph/Hz
COMPRESSOR TYPE
CAPACITOR µF 30 30 45 50 50 - -
RATED RUNNING CURRENT A 4.00 6.20 9.91 12.50 11.40 6.30 8.20
RATED INPUT POWER W 900 1,350 2,112 2,660 2,560 3,741 4,328
PROTECTION DEVICE
FAN TYPE / DRIVE
BLADE MATERIAL
DIAMETER mm/in
RATED RUNNING CURRENT A
RATED INPUT POWER W
MATERIAL
DIAMETER mm/in
THICKNESS mm/in
MATERIAL
THICKNESS mm/in
ROW 1
FIN PER INCH 16
FACE AREA
m2/ft
2
HEIGHT mm/in
DIMENSION WIDTH mm/in
DEPTH mm/in
WEIGHT kg 31.0 34.0 57.0 58.0 92.5 98.9 115
MATERIAL
CASING THICKNESS mm/in
FINISHING
TYPE
SIZE LIQUID mm/in 6.35 / 1/4 6.35 / 1/4 6.35 / 1/4 9.52 / 3/8 9.52 / 3/8 9.52 / 3/8 9.52 / 3/8
GAS mm/in 9.52 / 3/8 12.70 / 1/2 15.88 / 5/8 15.88 / 5/8 15.88 / 5/8 19.05 / 3/4 19.05 / 3/4
PACKING HEIGHT mm/in
DIMENSION WIDTH mm/in
DEPTH mm/in
REFRIGERANT CHARGE kg 0.78 0.93 1.65 1.65 1.90 3.13 3.15
1,000 / 39.4
1,200 / 47.2
560 / 22.0
1,030 / 40.6
400 / 15.7
GALVANIZED MILD STEEL
1.0 ~ 2.3 (0.0393 - 0.0905)
2
16
0.87 / 9.33
850 / 33.5
241
SEAMLESS COPPER
9.52 / 3/8
0.36 / 0.014
406 / 16 610 / 24
1.09
R407C / CAPILLARY TUBE (OUTDOOR) + (TXV)
240 / 1 / 50 415 / 3 / 50
SCROLL
OUTDOOR UNIT
0.51 / 5.53
646 / 25.4
840 / 33.1
330 / 13.0
0.32 / 3.50
494 / 19.4
OVERLOAD PROTECTION
PROPELLER / DIRECT
GLASS REINFORCED ACRLY STYRENE RESIN
2
14
1
19
FAN
0.56
R407C / CAPILLARY TUBE (OUTDOOR)
ROTARY HERMATIC
335 / 14
COMP
PIPE
FLARE VALVE / AEROQUIP
COIL
TUBE
FIN
740 / 29.1
270 / 10.6
ALUMINIUM (SLIT FIN TYPE)
0.127 / 0.005
401 / 15.8
0.8 / 0.031
0.28
62
710 / 28.0
957 / 37.7
461 / 18.1
EPOXY POLYESTER POWDER
FLARE VALVE
133
558 / 22.0
851 / 33.5
MODEL OUTDOOR UNIT A4LC10BR A4LC15BR A4LC 20BR A4LC 25BR A4LC 30CR A4LC 40CR A4LC 50CR
NOMINAL kcal/h
2,268 2,772 4,536 5,170 7,310 9,830 12,100
COOLING W
2,637 3,223 5,274 6,008 8,499 11,430 14,068
CAPACITY Btu/h
9,000 11,000 18,000 20,500 29,000 39,000 48,000
NOMINAL kcal/h
2,394 3,150 4,790 6,050 7,812 10,332 12,600
HEATING W
2,784 3,663 5,569 7,034 9,083 12,013 14,654
CAPACITY Btu/h
9,500 12,500 19,000 24,000 31,000 41,000 50,000
REFRIGERANT / CONTROL
POWER SOURCE V/Ph/Hz
COMPRESSOR TYPE
CAPACITOR µF
30 30 45 50 50 NIL NIL
RATED RUNNING CURRENT (COOLING) A
4.00 6.20 9.50 12.60 11.50 6.20 8.80
RATED RUNNING CURRENT (HEATING) A
3.30 5.70 10.10 12.50 11.40 5.90 7.80
RATED INPUT POWER (COOLING) W
900 1,350 2,002 2,571 2,424 3,565 4,615
RATED INPUT POWER (HEATING) W
750 1,200 2,096 2,549 2,407 3,280 3,734
PROTECTION DEVICE
FAN TYPE / DRIVE
BLADE MATERIAL
DIAMETER mm/in
RATED RUNNING CURRENT A
RATED INPUT POWER W
MATERIAL
DIAMETER mm/in
THICKNESS mm/in
MATERIAL
THICKNESS mm/in
ROW
FIN PER INCH
FACE AREA
m2/ft
2
0.56 / 6.00
HEIGHT mm/in
772 / 30.40
DIMENSION WIDTH mm/in
991 / 39.00
DEPTH mm/in
400 / 15.75
WEIGHT kg
31.0 34.0 57.0 58.0 92.5 98.9 115.0
MATERIAL
CASING THICKNESS mm/in
FINISHING
TYPE
SIZE LIQUID mm/in
6.35 / 1/4 6.35 / 1/4 6.35 / 1/4 9.52 / 3/8 9.52 / 3/8 9.52 / 3/8 9.52 / 3/8
GAS mm/in
9.52 / 3/8 12.70 / 1/2 15.88 / 5/8 15.88 / 5/8 15.88 / 5/8 19.05 / 3/4 19.05 / 3/4
PACKING HEIGHT mm/in
DIMENSION WIDTH mm/in
DEPTH mm/in
REFRIGERANT CHARGE kg
0.98 1.00 1.70 1.65 2.35 3.10 3.35
558 / 22.0
851 / 33.5
401 / 15.8
0.77 / 8.29
960 / 37.80
1,095 / 43.10
437 / 17.20
740 / 29.1
270 / 10.6
GALVANIZED MILD STEEL
2
16
0.32 / 3.50
494 / 19.4
1
19
2
14
ALUMINIUM (SLIT FIN TYPE)
0.127 / 0.005
9.52 / 3/8
0.36 / 0.014
1.09
241
SEAMLESS COPPER
0.28
62
0.56
R407C / CAPILLARY TUBE (OUTDOOR)
240 / 1 / 50
ROTARY HERMATIC
OVERLOAD PROTECTION
R407C / CAPILLARY TUBE (OUTDOOR) + (TXV)
415 / 3 / 50
SCROLL
1,016 / 40.0
1,207 / 47.5
559 / 22.0
1.0 - 2.3 ( 0.0393 - 0.0905 )
FLARE VALVE
EPOXY POLYESTER POWDER
FLARE VALVE / AEROQUIP
710 / 28.0
957 / 37.7
461 / 18.1
610 / 24
PROPELLER / DIRECT
GLASS REINFORCED ACRLY STYRENE RESIN
335 / 14
TUBE
FIN
PIPE
406 / 16
330 / 13.0
0.8 / 0.031
0.51 / 5.53
646 / 25.4
840 / 33.1
133
OUTDOOR UNIT
COMP
FAN
COIL
3
MODEL : A4LC 10B / 15B, 10BR / 15BR
All dimensions in mm
MODEL : A4LC 20B / 25B, 20BR / 25BR
All dimensions in mm
3. OUTLINES AND DIMENSIONS
4
MODEL : A4LC 30/40/50C, A4LC 30/40/50CR
All dimensions in mm
Sharp edges and coil surfaces may cause injury. Wear protective
gloves when handling the unit.
5
MODEL : A4LC 10/15B
MODEL : A4LC 10/15BR
4. WIRING DIAGRAMS
6
MODEL : A4LC 20/25B
MODEL : A4LC 20/25BR
7
MODEL :A4LC 30C
MODEL : A4LC 30CR
Loading...