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26
(3) REFRIGERANT PIPING
MAXIMUM PIPING LENGTH AND MAXIMUM NUMBER OF BENDS
When the pipe length becomes too long, both the capacity and reliability drop. As the number of bends
increases, system piping resistance to the refrigerant flow increases, thus lowering the cooling capacity, and
as the result the compressor may become defective. Always choose the shortest path and follow the recom-
mendation as tabulated below:
Piping Sizes (Flare Connection Type)
Piping sizes are as follows:
Piping Connection to the Units
• Align the center of the piping and tighten the flare nut sufficiently with fingers.
• Finally tighten the flare nut with torque wrench unit the wrench clicks.
• When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on
the wrench.
Pipe Size (mm/in) Torque (Nm)
6.35 (1/4) 18
9.52 (3/8) 42
12.70 (1/2) 55
15.88 (5/8) 65
19.05 (3/4) 78
Indoor 015E/ER 020E/ER 025E/ER
Outdoor 015C/CR 018 / 020C/CR 025C/CR 028C/CR 030 / 035C/CR
12 15 15 15 45
588825
10 10 10 10 10
Maximum No. of Bends
Model
028E/ER
Maximum Length, m
Maximum Elevation, m
Model
MLC 015C/CR MLC 018/020C/CR MLC 025C/CR MLC 028C/CR MLC 030C/CR
Liquid (mm/in)
6.35 /
1
/
4
6.35 /
1
/
4
9.52 /
3
/
8
9.52 /
3
/
8
9.52 /
3
/
8
Suction (mm/in)
12.70 /
1
/
2
15.88 /
5
/
8
15.88 /
5
/
8
15.88 /
5
/
8
15.88 /
5
/
8
Model
M5LC 015C/CR M5LC 020C/CR M5LC 025C/CR M5LC 028C/CR M5LC 035C/CR
Liquid (mm/in)
6.35 /
1
/
4
6.35 /
1
/
4
6.35 /
1
/
4
9.52 /
3
/
8
9.52 /
3
/
8
Suction (mm/in)
12.70 /
1
/
2
12.70 /
1
/
2
15.88 /
5
/
8
15.88 /
5
/
8
15.88 /
5
/
8
R22
R410A
- Ceiling Convertible 1
- Split Systems 1
- Table of ContentsContents 3
- O A P C A 6
- LC 020 C R 5 M 6
- G E F A 7
- LC 030 C R 4 M 7
- Outdoor Unit 10
- MLC Product Line Up (R22) 10
- M4LC Product Line Up (R407C) 11
- M5LC Product Line Up (R410A) 11
- Caution : 13
- Refrigerant Circuit Diagram 14
- MODEL: MCM 025D – MLC 025C 14
- Model : MCM 030D – MLC 028C 15
- Model : MCM 030D – MLC 030C 15
- MCM 040D – MLC 035 / 040C 15
- MCM 050D – MLC 050C 15
- MCM 062C – MLC 061C 15
- M5CM 050D – M5LC 050C 16
- M5CM 062C – M5LC 061C 16
- Model : MCM 020DR – MLC 020CR 16
- Model : MCM 025DR – MLC 025CR 17
- Model : MCM 030DR – MLC 028CR 17
- Model : MCM 062CR – MLC 061CR 19
- G7 Remote Controller 20
- Wired Remote Control - SLM 22
- Phsae Sequencer 23
- Installation 24
- MCM-D MCM 062C 25
- MCM 062C 26
- MCM-D MCM 062C 26
- Figure C 26
- Figure D 26
- Figure I 28
- Figure J 28
- (3) Refrigerant Piping 30
- 4) Wiring 31
- (5) Vacuuming and Charging 31
- (6) Additional Charge 31
- R22 - Nil 32
- R410A - Nil 32
- (6) Overall Checking 37
- Microphone 38
- MCM 020D/DR NC CURVES 39
- MCM 025D/DR NC CURVES 39
- MCM30D/DR NC CURVES 40
- MCM 040D/DR NC CURVES 40
- MCM 050D/DR NC CURVES 41
- MCM 062C/CR NC CURVES 41
- Components Data (R22) 56
- Components Data (R410A) 66
- Safety Devices 70
- R22 Models 78
- Model : MCM 020D / MLC 018C 78
- Model : MCM 020D / MLC 020B 78
- Model : MCM 020D / MLC 020C 79
- Model : MCM 025D / MLC 025B 79
- Model : MCM 025D / MLC 025C 80
- Model : MCM 030D / MLC 028C 80
- Model : MCM 030D / MLC 030C 81
- Model : MCM 040D / MLC 035C 81
- Model : MCM 040D / MLC 040C 82
- Model : MCM 050D / MLC 050C 82
- Model : MCM 062C / MLC 061C 83
- Model : MCM 025DR / MLC 025BR 86
- Model : MCM 025DR / MLC 025CR 87
- Model : MCM 030DR / MLC 028CR 88
- Heating Mode 88
- Model : MCM 030DR / MLC 030CR 89
- Model : MCM 040DR / MLC 035CR 90
- Model : MCM 040DR / MLC 040CR 91
- Model : MCM 050DR / MLC 050CR 92
- Model : MCM 062CR / MLC 061CR 93
- Model : MCM 020D / M4LC 020B 94
- Model : MCM 025D / M4LC 025B 94
- Model : MCM 030D / M4LC 030C 95
- Model : MCM 040D / M4LC 035C 95
- Model : MCM 040D / M4LC 040C 96
- Model : MCM 050D / M4LC 050C 96
- Model : MCM 062C / M4LC 061C 97
- R407C Models 100
- (Heatpump) 100
- Cooling Mode 100
- Heating Mode 100
- Heating Mode 103
- R410A Models 105
- (Cooling only) 105
- Model : M5CM 040D / M5LC 035C 105
- Model : M5CM 040D / M5LC 040C 105
- Model : M5CM 050D / M5LC 050C 106
- Model : M5CM 062C / M5LC 061C 106
- Indoor Unit 111
- Model : MCM - D SERIES 111
- Model : MCM 062C/CR 112
- Model : MLC 018C 113
- M5LC 035 / 040 / 050C/CR 114
- Pre Start Up Maintenance 127
- For MLC Outdoor Models 128
- Diagnostic Guidelines 130
- 14°C to 20°C. * 133
- Model : MCM 020 / 025 D/DR 134
- Model : MCM 030 D/DR 135
- Model : MCM / M5CM 062 C/CR 137
- Model : MLC 018 / 020C 138
- Model : MLC 025 / 028C 139
- Model : MLC 020CR 140
- Model : MLC 025 / 028CR 141
- Model : MLC / M4LC 020 / 025B 142
- 2006 McQuay International 145
- ContentsContents 146
- Contents 146
- PRODUCT LINE UP 149
- OUTDOOR UNIT 150
- MLC-C SERIES PRODUCT LINE UP 150
- M5LC-C SERIES PRODUCT LINE UP 151
- Caution : 153
- REFRIGERANT CIRCUIT DIAGRAMS 154
- MODEL : MCM 025E - MLC 025C 154
- M5CM 028E - M5LC 028C 154
- MODEL : MCM 028E - MLC 028C 155
- MODEL : MCM 028E - MLC 030C 155
- MODEL : M5CM 028E - M5LC 035C 156
- M5CM 025ER - M5LC 025CR 157
- MODEL : MCM 028ER - MLC 030CR 158
- CONTROLLERS 160
- SLM AC-5300 (OPTIONAL) 161
- COOL DRY FAN HEAT 162
- Wired Remote Control – SLM 163
- Phase Sequencer 163
- INSTALLATION 164
- Figure A 164
- Under ceiling type 165
- Floor standing type 165
- Floor standing installation 167
- To Adjust the Vane Direction 170
- INSTALLATION CLEARANCE 171
- (3) REFRIGERANT PIPING 172
- (4) WIRING 173
- (5) VACUUMING AND CHARGING 173
- (6) ADDITIONAL CHARGE 173
- (7) OVERALL CHECKING 174
- Dip-pipe 176
- Invert cylinder 176
- COMPONENTS DATA (R22) 191
- COMPONENTS DATA (R410A) 199
- SAFETY DEVICES 205
- Example: 209
- Solution: 209
- PERFORMANCE TABLES 213
- R22 MODELS 214
- (COOLING ONLY) 214
- MODEL : MCM 020E / MLC 020C 214
- MODEL : MCM 025E / MLC 025C 214
- MODEL : MCM 028E / MLC 028C 215
- MODEL : MCM 028E / MLC 030C 215
- HEATING MODE 217
- (HEATPUMP) 217
- MODEL : MCM 020ER / MLC 018CR 217
- COOLING MODE 217
- R410A MODELS 222
- MODEL : M5CM 015E / M5LC 015C 222
- MODEL : M5CM 028E / M5LC 028C 224
- MODEL : M5CM 028E / M5LC 035C 225
- INDOOR UNIT 233
- MCM 015/020/025/028E/ER 233
- M5CM 015/020/025/028E/ER 233
- MLC / M5LC 015 C/CR 233
- MLC 030C/CR 234
- M5LC 035C/CR 234
- MLC 018C/CR 234
- MLC 020/025/028C/CR 234
- M5LC 020/025/028C/CR 234
- COOLING ONLY 243
- MODEL: MCM / M5CM 015E 243
- MODEL: MLC / M5LC 015C 243
- MODEL: MCM / M5CM 020/025E 244
- MODEL: MLC 018C 244
- MLC / M5LC 020/025C 244
- MODEL: MCM / M5CM 028E 245
- MODEL: MLC / M5LC 028C 245
- MODEL: MCM 028E 246
- MODEL: MLC 030C 246
- MODEL: M5CM 028E 247
- MODEL: M5LC 035C 247
- HEATPUMP 248
- MODEL: MCM / M5CM 015ER 248
- MODEL: MLC / M5LC 015CR 248
- MODEL: MCM / M5CM 020/025ER 249
- MODEL: MLC 018CR 249
- MLC / M5LC 020/025CR 249
- MODEL: MCM / M5CM 028ER 250
- MODEL: MLC / M5LC 028CR 250
- MODEL: MCM 028ER 251
- MODEL: MLC 030CR 251
- MODEL: M5CM 028ER 252
- MODEL: M5LC 035CR 252
- 3 PHASE / 50Hz / 380 - 415V 253
- MODEL: MLC / M5LC 025 / 028C 264
- MODEL: MLC / M5LC 025 / 028CR 267
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