5
The service rules of the R407C product
The service rules of the R410A product
1. The service rules of the new refrigerant R407C product
Midea uses the green refrigerant R407C firstly in China.
Its thermal characters are similar to R22, but there is little difference between them.
1.1 The main difference between R407C and R22:
1.2 Service precautions:
1.2.1 Because R407C is a mixture composed of three kinds of matter, when vapor phase and liquid
phase coexist, the component of the vapor phase is different from the liquid phase. When we fill
the refrigerant, we must ensure to fill it in liquid phase, in order to maintain the stability of the
character.
1.2.2
The leakage of the refrigerant is from vapor side or liquid side, and the leakage from vapor side
could make the component change and impact the character seriously. So when the amount of
the leakage is up to 5%, we need discharge all refrigerant in the system, and fill liquid
refrigerant according to amount in nameplate.
1.2.3 Because the lubricant fit for refrigerant R407C is ester refrigerating engine oil (POE) or ether
refrigerating engine oil (PVE). The mineral lubricant fit for refrigerant CFC and HCFC is weak in
consistent with the HFC, and it doesn’t fit for the refrigerant HFC. So when the compressor
using new refrigerant R407C is worn out, to replace it by compressor of CFC or HCFC is
forbidden.
1.2.4 When the connection of the refrigerant pipe is finished, before the system start up we should
vacuum the indoor unit by cut-off valve or discharge the indoor unit air by refrigerant R407C
bottle. Discharged the air in system by outdoor unit refrigerant is forbidden.
1.2.5 Ester oil could adsorb the water in the air. In order to removemoisture in refrigeration system,
avoid capillary jammed by ice and the ester lubricant oil decomposed with water, we use
desiccant in system. Artificial zeolite (molecular sieve R etc.) is the effective water sorbent.
Toavoid absorb refrigerant but only absorbmoisture, we use the molecular sieve whose
aperture is smaller than the molecule of the refrigerant. For R407C we should adopt XH-11
rather than XH-9AK and 4A-NRG.
1.2.6 Because the corrosion of R407C and POE to high molecular material is different from R22 and
mineral oil, the airproof material inside high/low pressure valve and foul-way valve needs to be
changed in refrigeration system, such as R407C, polyurethane rubber etc. The high/low
pressure valve and four-way valve which are fit for R22 couldn’t be used in service.
1.2.7
When there is leakage, filling with other kind of refrigerant is forbidden.
1.2.8 When we need to vacuum the system, we should use the special quick joint, but use the quick
joint of other refrigerant is forbidden lest pollute by mixing refrigerant. The time for vacuuming is
R407C
R22
Component
HFC32/125/134a
HCFC22
The ratio of mix Wt
%
23/25/52
100
The saturation liquid density Kg/m
3
1136 1191
Normal pressure kj/kg.k
0.835
0.622
Specific heat
The saturation liquid kj/kg.k
1.554
1.256
Evaporating pressure kpa
499
498
Condensing pressure kpa
2112
1943
Temperature slippage
℃
4.3-7.1
0
Heating capacity w
92-97
100
Input power w
106
100
COP 97
100
The consistent with the oil
Fat oil
Mineral oil
Summary of Contents for CE-KF20GW/N1Y-H
Page 6: ...3 4 Outdoor unit MSH 07CRN1 MSH 07HRN1 3 5 Outdoor unit MSH 09CRN1 MSH 09HRN1 248...
Page 7: ...3 6 Outdoor unit MSH 12CRN1 MSH 12HRN1 530 315 290 750 110 62 590 285 249...
Page 8: ...4 Refrigeration cycle diagram 250...
Page 35: ...229 1 Features 1 1Compact design 1 2High efficiency and quiet operation...
Page 37: ...231 3 Dimensions 3 1 Indoor unit 3 2 Outdoor unit...
Page 40: ...234 6 Wiring diagram Indoor unit Outdoor unit...
Page 51: ...1 Features 1 1Compact design 1 2High efficiency and quiet operation 215...
Page 53: ...3 Dimensions 3 1 Indoor unit 3 2 Outdoor unit 217...
Page 54: ...4 Refrigeration cycle diagram 218...
Page 70: ...203 3 Dimensions 1 Indoor unit 7 9K 2 Indoor Unit 12K 3 Outdoor unit...
Page 75: ...208 7 Wiring Diagram 7 1 Indoor unit 7 9K 7 2 Indoor unit 12K...
Page 76: ...209 7 3 Outdoor unit M2OA 18HRIN2 Outdoor unit M3OA 27HRIN2...
Page 85: ...182 3 Dimensions 3 1 Indoor Unit MSG 09HRI MSG 07 09HRIN2 3 2 Indoor Unit MSG 12HR1...
Page 86: ...183 3 3 Indoor Unit MSG 12HRIN2 3 4 Outdoor Unit...
Page 90: ...187 Outdoor unit MSG 09HRI MSG 12HRI S N L...
Page 91: ...188 Indoor unit MSG 12HRIN2 Outdoor unit MSG 07HRIN2 MSG 09HRIN2 MSG 12HRIN2 N L S...
Page 101: ...1 Features 1 1Compact design 1 2High efficiency and quiet operation 158...
Page 103: ...3 Dimensions 3 1 Indoor unit MSG1 07 09C H RN2 3 2 Indoor unit MSG1 12C H RN2 280 160...
Page 104: ...3 3 Outdoor unit MSG1 07C H RN2 3 4 Outdoor unit MSG1 09C H RN2 161...
Page 105: ...3 5 Outdoor unit MSG1 12C H RN2 530 315 290 750 110 62 590 285 162...
Page 110: ...6 2 Heating cooling 6 2 1 MSG1 07HRN2 MSG1 09HRN2 167...
Page 111: ...6 2 2 MSG 12HRN2 168...
Page 122: ...1 Features 1 1Compact design 1 2High efficiency and quiet operation 140...
Page 126: ...3 Dimensions 3 1 Indoor unit 3 2 Outdoor unit 144...
Page 130: ...6 2 Heating cooling 148...
Page 144: ...3 Dimensions 3 1 Indoor unit 7000Btu h 9000Btu h 12000Btu h 132...
Page 145: ...3 2 Outdoor unit 133...
Page 153: ...117 3 Dimensions 3 1 Indoor unit 3 2 Outdoor unit 62 77 860 895 589 6 142 9 302 328 350...
Page 168: ...3 Dimensions 3 1 Indoor unit 3 2 Outdoor unit 12 5 102...
Page 171: ...6 Wiring diagram 6 1 MSG 24CR MSG 30CR MSG 24CRN2 MSG 30CRN2 220V 1Ph A2 A1 105...
Page 172: ...6 2 MSG 24HR MSG 30HR MSG 24HRN2 MSG 30HRN2 220V 1Ph A1 A2 106...
Page 173: ...6 2 MSG 30CR MSG 30CRN2 380V 3Ph 107...
Page 174: ...6 2 MSG 30HR MSG 30HRN2 380V 3Ph 108...
Page 182: ...1 Features 1 1Compact design 1 2High efficiency and quiet operation 66...
Page 190: ...3 3 Indoor unit MSG 18 21C H R N2 3 4 Outdoor unit MSG 05 07 09C H R N2 74...
Page 192: ...3 7 Outdoor unit MSG 21C H R N2 12 5 76...
Page 201: ...6 2 2 MSG 12HR B TYPE MSG 12HRN2 85...
Page 226: ...6 1 5 MSG 30CRN2 380V 50Hz A N 1 2 3 4 58...
Page 227: ...6 2 1 MSB 07HRN2 MSB 09HRN2 6 2 2 MSB 12HRN2 59...
Page 229: ...6 2 4 MSB 21HRN2 61...
Page 230: ...6 2 5 MSB 24HRN2 MSB 30HRN2 A1 A2 62...
Page 231: ...6 2 6 MSB 30HRN2 380V 50Hz 63...
Page 236: ...3 Dimensions 3 1 Indoor unit 18000 21000Btu h 3 2 Indoor unit 24000 30000Btu h 31...
Page 237: ...3 3 Outdoor unit 18000 3 4 Indoor unit 21000 30000Btu h 12 5 32...
Page 240: ...6 Wiring diagram 6 1 MSB 18CR MSB 21CR 35...
Page 241: ...6 2 MSB 24CR MSB 30CR 36...
Page 243: ...6 4 MSB 21HR 38...
Page 244: ...6 5 MSB 24HR MSB 30HR A1 A2 39...
Page 254: ...12 3 Dimensions 3 1 Indoor unit 5000 9000Btu h 12000Btu h...
Page 255: ...13 3 2 Outdoor unit 5000 9000Btu h 3 3 Outdoor unit 12000Btu h...
Page 258: ...16 6 Wiring diagram 6 1 Cooling only 5000 9000Btu h 12000Btu h...
Page 260: ...18 6 2 Heating cooling 5000 9000Btu h 12000Btu h...
Page 261: ...19 Outdoor unit...
Page 280: ...3 Dimensions 3 1 Indoor unit MSH 09HRDN1 3 2 Indoor unit MSH 12HRDN1 279...
Page 281: ...3 4 Outdoor unit MSH 09HRDN1 MSH 12HRDN1 530 315 290 750 110 62 590 285 280...
Page 282: ...4 Refrigeration cycle diagram 281...
Page 308: ...1 Features 1 3Compact design 1 4 ation High efficiency and quiet oper...
Page 312: ......
Page 313: ...4 Refrigeration cycle diagram...
Page 316: ......
Page 318: ......
Page 332: ...2 1 Features 1 1Compact design 1 2High efficiency and quiet operation...
Page 336: ...3 4 Outdoor unit MSH 07CR MSH 07HR MSH 09CR MSH 09HR 3 5 Outdoor unit MSH 12CR MSH 12HR 6...
Page 337: ...4 Refrigeration cycle diagram 7...
Page 345: ...7 2 1 2 MSH 12CR 15...
Page 346: ...7 2 2 Heating cooling 7 2 2 1 MSH 07HR MSH 09HR 16...
Page 347: ...7 2 2 2 MSH 12HR 17...