Lennox MCB Series User manual

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MINI-SPLIT SYSTEMS SERVICE MANUAL
MCB/MWCB and MHB/MWHB
Series Unit Information
100041 5/2022
Table of Contents
1. Indoor Units ............................................................. 2
1.1. ModelNumberIdentication .............................................2
1.2. IndoorUnitSpecications .................................................2
1.3. IndoorUnitDimensions(AllModels).................................4
1.4. IndoorUnitClearances(AllModels) .................................4
1.5. IndoorUnitWallMounts(AllModels) ................................5
2. Indoor/Outdoor Matches......................................... 5
3. Connection to Centralized Controller.................... 6
3.1. SetIndoorUnitAddressforCentralizedControl
(UsedwithVRFOnly) .......................................................6
3.2. IndoorUnitConnectionPointsforCentralized
Controller...........................................................................6
4. Outdoor Units .......................................................... 7
4.1. ModelNumberIdentication .............................................7
4.2. Specications ....................................................................7
4.3. MCBCoolingCapacity ......................................................9
4.3.1. - 009 (208/230V) ...............................................9
4.3.2. - 012 (115V) ....................................................10
4.3.3. - 012 (208/230V) .............................................10
4.3.4. - 018 (208/230V) ............................................. 11
4.3.5. - 024 (208/230V) ............................................. 11
4.4. MHBCoolingCapacity ....................................................12
4.4.1. - 009 (115V) ....................................................12
4.4.2. - 009 (208/230V) .............................................12
4.4.3. - 012 (115V) ....................................................13
4.4.4. - 012 (208/230V) .............................................13
4.4.5. - 018 (208/230V) .............................................14
4.4.6. - 024 (208/230V) .............................................14
4.5. MHBHeatingCapacity....................................................15
4.5.1. - 009 (115V) ....................................................15
4.5.2. - 009 (208/230V) .............................................15
4.5.3. - 012 (115V) ....................................................15
4.5.4. - 012 (208/230V) .............................................15
4.5.5. - 018 (208/230V) .............................................16
4.5.6. - 024 (208/230V) .............................................16
4.6. OutdoorUnitDimensions(MCBandMHB).....................17
4.7. OutdoorUnitClearances.................................................17
4.7.1. Single Units.....................................................17
4.7.2. Multiple Units .................................................. 18
5. Refrigeration Pipe Work........................................ 19
5.1. Single-ZoneRefrigerantCycleDiagram .........................19
5.2. Single-ZonePipingLimitations........................................19
5.3. AddRefrigerantafterLong-TermSystemOperation....... 20
5.4. ServicingIndoorUnitRefrigerationCircuit ......................20
5.4.1. Collecting Refrigerant into Outdoor Unit .........20
5.4.2. Air Purging with Vacuum Pump ...................... 20
5.5. EvacuationafterServicingtheOutdoorUnit
RefrigerationCircuit ........................................................21
5.5.1. Evacuation of the Complete Refrigeration
Circuit (Indoor and Outdoor Units) ..................21
5.5.2. Refrigerant Charging.......................................21
5.6. CoolingChart ..................................................................22
5.7. CapacityRequestCalculations .......................................22
MCB / MHB Single-Zone
Outdoor Units
MWCB / MWHB Wall Mount Single-Zone
Indoor Unit
Pleasereferto100042forindoorandoutdooruniterrorcodesandcomponentdiagnostics.

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1. Indoor Units
1.1. Model Number Identication
M WC B 009 S 4 - 1 P
Unit Type
WC=Wall-MountedNon-DuctedUnit
Series Type
M = Mini-Split
Voltage
L=115V-1phase-60Hz
P=208/230V-1phase-60Hz
Cooling Efciency
S=StandardEfciency
Major Design Sequence
B=SecondGeneration
Nominal Cooling Capacity
009 = 0.75 ton
012 = 1 ton
018=1.5tons
024=2tons
Refrigerant Type
4=HFC-410A
Minor Design Sequence
1=1stRevision
1.2. Indoor Unit Specications
Indoor Unit Model No. MWCB009S4 MWCB012S4 MWCB018S4 MWCB024S4
Nominal Size - Tons 0.75 1 1.5 2
PowerSupply-60Hz-1phase 208/230V 115V 208/230V 208/230V 208/230V
Ratedloadamps 3.13 8.5 4.2 6.8 9.3
Output(W) 13 20 13 30 58
Room Temperature Range (°F) Cooling 60 - 90 60 - 90 60 - 90 60 - 90 60 - 90
AirVolume-cfm(High/Medium/Low) 246 / 205 / 147 333 / 253 / 211 324 / 232 / 194 471 / 353 / 306 588/471/400
SoundData(dBA)-Low/Medium/High 35.0/31.0/22.5 40.5/35.5/33 40/35.5/30.5 46/38.5/31.5 47.5/39.5/36
PipingConnections-Liquid/Gas-o.d.-are-in. 1/4/3/8 1/4 / 1/2 1/4 / 1/2 1/4 / 1/2 3/8/5/8
Drainconnectiono.d.-in. 1111 1
Net/Shippingweights-lbs. 18/23 20 / 25 19 / 25 25 / 32 30/38
Indoor Unit Model No. MWHB009S4 MWHB012S4
Nominal Size - Tons 0.75 1
PowerSupply-60Hz-1phase 115V 208/230V 115V 208/230V
Ratedloadamps 6.3 3.11 10.13 4.9
Output(W) 20 13 20 13
Room Temperature Range (°F) Cooling 60 - 90 60 - 90 60 - 90 60 - 90
Heating 32-86 32-86 32-86 32-86
AirVolume-cfm(High/Medium/Low) 239 / 170 / 137 246 / 176 / 141 300 / 241 / 176 291 / 197 / 156
SoundData(dBA)-Low/Medium/High 37.5/28/20 37/28/20 41 / 35 / 26.5 41 / 35 / 24
PipingConnections-Liquid/Gas-o.d.-are-in. 1/4/3/8 1/4/3/8 1/4 / 1/2 1/4 / 1/2
Drainconnectiono.d.-in. 1 1 1 1
Net/Shippingweights-lbs. 18/23 18/23 19 / 24 19 / 24

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Indoor Unit Model No. MWHB018S4 MWHB024S4
Nominal Size - Tons 1.5 2
PowerSupply-60Hz-1phase 208/230V 208/230V
Ratedloadamps 7.5 11.2
Output(W) 30 58
Room Temperature Range (°F) Cooling 60 - 90 60 - 90
Heating 32-86 32-86
AirVolume-cfm(High/Medium/Low) 459 / 329 / 271 546 / 402 / 331
SoundData(dBA)-Low/Medium/High 45/38/30 45 / 39 .5 / 36
PipingConnections-Liquid/Gas-o.d.-are-in. 1/4 / 1/2 3/8/5/8
Drainconnectiono.d.-in. 1 1
Net/Shippingweights-lbs. 25 / 32 30/38

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1.3. Indoor Unit Dimensions (All Models)
FRONT VIEW
BOTTOM VIEW
SIDE VIEW
A
B
Lorem
C
Figure 1. Indoor Unit Dimensions - Inches (mm)
Size A B C
in. mm in. mm in. mm
9K 27-3/4 730 11-1/2 292 8-1/8 207
12K 31-3/4 806 11-5/8 295 7-7/8 200
18K 38-1/4 972 12-3/4 324 9-1/8 232
24K 42-5/8 1083 13-1/4 337 9-3/8 238
1.4. Indoor Unit Clearances (All Models)
FRONT VIEW
Wall
Vertical Clearance - Clearance to Floor - 72 inches (1829 mm) Minimum
96 inches (2438 mm) Recommended
5”
(127 mm)
Minimum
6” (152 mm)
Minimum Clearance
Ceiling
Wall
Floor
5”
(127 mm)
Minimum
59”
(1499 mm)
Minimum
SIDE VIEW
Any Object

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1.5. Indoor Unit Wall Mounts (All Models)
Indoor unit outline
13-3/4 (349) 9K
15-7/8 (403) 12K
11-1/2 (290) 9K
11-3/4 (297) 12K
Right rear side
refrigerant pipe inlet
2-1/2 (64) diameter
Left rear side
refrigerant pipe inlet
2-1/2 (64) diameter
28-1/2 (724) 9K
31-3/4 (806) 12K
1-7/8
(48)
1-7/8 (48) 9K
2-1/8 (54) 12K
2-7/8 (73) 9K
2-1/4 (57) 12K
3-1/8 (79) 9K
2-1/2 (64) 12K
1-3/4 (45) 9K
5-1/4 (133) 12K
Figure 2. 9K and 12K Indoor Unit Wall Plate Dimensions - Inches (mm)
3-7/8 (98) 18K
5-1/8 (130) 24K
2-1/2 (64) 18K 3-3/8 (86) 24K
150
100 100
100
50
50 50
2
2
4
44
6
RECOMMAND
LIQUID GAS
BUBBLE
LEVEL
mm inch
mm
inch
Indoor unit outline
Right rear side
refrigerant pipe inlet
2-1/2 (64) diameter 18K
3-1/2 (90) 24K
Left rear side
refrigerant pipe inlet
2-1/2 (64) diameter 18K
3-1/2 (90) 24K
1-7/8 (48) 18K
2-1/8 (54) 24K
2-1/8 (54) 18K
2-1/4 (57) 24K
12-1/2 (318) 18K
13-3/8 (340) 24K
20-3/4 (527) 18K
23-3/4 (603) 24K
38-1/4 (972) 18K
42-5/8 (1083) 24K
Figure 3. 18K - 24K Indoor Unit Wall Plate Dimensions - Inches (mm)
2. Indoor/Outdoor Matches
Indoor Unit
Type Outdoor Unit Indoor Unit Cooling Capacity SEER EER Energy Star
Wall-Mounted
Ductless
MCB009S4S-1P MWCB009S4-1P 9,000 20.5 12.5 Yes
MCB012S4S-1L MWCB012S4-1L 11,500 21.0 11.9 No
MCB012S4S-1P MWCB012S4-1P 11,500 21.0 11.98 No
MCB018S4S-1P MWCB018S4-1P 17,500 21.0 11.26 No
MCB024S4S-1P MWCB024S4-1P 22,000 20.0 10.20 No
RatingsareAHRIcertiedtoAHRIStandard210/240(with25ft.ofconnectingrefrigerantlines);95°Foutdoorairtemperature,80°Fdb/67°Fwbenteringevaporatorair.
Indoor Unit
Type Outdoor Unit Indoor Unit Cooling Capacity SEER EER Energy Start
Wall-Mounted
Ductless
MHB009S4S-1L MWHB009S4-1L 9,000 21.5 12.5 Yes
MHB009S4S-1P MWHB009S4-1P 9,000 21.5 12.6 Yes
MHB012S4S-1L MWHB012S4-1L 12,000 20.0 10.3 No
MHB012S4S-1P MWHB012S4-1P 12,000 20.5 10.8 No
MHB018S4S-1P MWHB018S4-1P 18,000 19.5 11.0 No
MHB024S4S-1P MWHB024S4-1P 24,000 18.5 9.50 No
RatingsareAHRIcertiedtoAHRIStandard210/240withAddenda1and2;
•CoolingRatings-80°Fdrybulb/67°Fwetbulbenteringindoorcoilairand95°Fwetbulb/75°Fdrybulboutdoorairtemperature.
•HighTemperatureHeatingRatings-70°Fdrybulb/60°Fwetbulbenteringindoorcoilairand47°Fdrybulb/43°Fwetbulboutdoorairtemperature.
•LowTemperatureHeatingRatings-70°Fdrybulb/60°Fwetbulbenteringindoorcoilairand17°Fdrybulb/15°Fwetbulboutdoorairtemperature.
ToconvertHSPFfromRegionIVtoRegionV-Divideby1.15.

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3. Connection to Centralized Controller
3.1. Set Indoor Unit Address for Centralized
Control (Used with VRF Only)
All indoor units connected to a centralized controller must
haveauniqueaddress.UsetheS1dipswitchandtheS2
dialswitchtosettheaddressforeachindoorunit.Thetable
belowshowshowtosettheuniqueaddresses.
Allindoorunitsarefactorysetto“0”.Tochangetheaddress
to“1”,movethedialswitchtothe1position,donotadjust
thedipswitches.Tochangetheaddressto“35”,movedip
switch1totheUPpositionandmovethedialswitchtothe
3position.
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
12
ON
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
12
ON
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
12
ON
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
12
ON
S1+S2
FORSETTINGADDRESS
RANGE
ADDRESS
FACTORY SETTING
0 ~ F 0 ~ F 0 ~ F 0 ~ F
0 ~ 15 16 ~ 31 32 ~ 47 48 ~ 63
DIP SWITCH
HANDLES
LEFT - DOWN
RIGHT - DOWN
LEFT - DOWN
RIGHT - UP
LEFT - UP
RIGHT - DOWN
LEFT - UP
RIGHT - UP
Figure 4. Dip Switches
IndoorUnitAddressis0
BothdipswitchhandlesareDOWN,dialpointsto0.
IndoorUnitAddressis32
Dipswitch1isUPanddipswitch2isDOWN,dialpointsto0.
Switchlocationandcolorvariesforeachindoorunit.Twoexamplesareshownabove.
Figure 5. Dip Switch Settings
3.2. Indoor Unit Connection Points for
Centralized Controller
Mini-split indoor units can be connected to a centralized
controller(e.g.LennoxVRFManager-LVMorTraneTracer)
oraBACnetorLonWorksgatewayusingtheXYEterminals
ontheindoorunitmainboard.
To CCM
Comm.Bus
X Y (E)
Y/G
Figure 6. Indoor Unit Connection Points
Figure 7. Typical Indoor Unit Connection Points

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4. Outdoor Units
4.1. Model Number Identication
M C B 009 S 4 S - 1 P
Series Type
M = Mini-Split
Cooling Efciency
S=StandardEfciency
Major Design Sequence
B=SecondGeneration
Nominal Cooling Capacity
009 = 0.75 ton
012 = 1 ton
018=1.5tons
024=2tons
Refrigerant Type
4=HFC-410A
Refrigerant Circuits
S=SingleCircuit
Minor Design Sequence
1=1stRevision
Voltage
L=115V-1phase-60Hz
P=208/230V-1phase-60Hz
Unit Type
C=AirConditioner
W=HeatPump
4.2. Specications
Outdoor Unit Model No. MCB009S4S MCB012S4S MCB018S4S MCB024S4S
Nominal Size - Tons 0.75 1 1.5 2
Ambient Temperature Operating Range - °F 5 - 122 5 - 122 5 - 122 5 - 122
Energy Star
Sound Data (dBA) 53.5 54(115V)
54.5(208/230V)
54.5 55.5
Refrigerant(R-410A) Chargefurnished 1lb.5oz. 1lb.7oz. 2lbs.0oz. 2lbs.6oz.
Maximumlinelengthwithfurnishedcharge-ft. 25 25 25 25
Additionalchargerequiredperft.-oz. 0.16 0.16 0.16 0.32
Compressor No.andType (1)Rotary (1)Rotary (1)Rotary (1)Rotary
Refrigerantoiltype VG74 VG74 VG74 VG74
Refrigerantoilcharge-oz. 10.5 10.5 14.9 14.9
Connections - in. Liquid/Gaspipe(are) 1/4/3/8 1/4 / 1/2 1/4 / 1/2 3/8/5/8
Maximumrefrigerantpipelength-ft. 82 82 98 98
Max.differenceinlevelofindoorunit-ft. 33 33 66 66
Outdoor Fan (No.)Diameter-in. (1)16-5/8 (1)16-5/8 (1)16-1/2 (1)17
Totalairvolume-cfm 1059 1059 1235 1253
rpm 850/500 850/600 810/700/600 710/700/550
Outdoor Coil Numberofrows 1 1 2 2
Finsperinch 21 21 21 21
Fintype Hydrophilicaluminum
Tubeoutsidediameter-in. 3/16 3/16 3/16 3/16
Tubetype Riedcoppertubing
Netfacearea-ft.² 3.63 3.73 4.17 4.78+4.00
Design Pressure PSIG 550/340 550/340 550/340 550/340
Shipping
Data
Net/Shippingweight(lbs.)(115V) - - - 51 / 55 - - - - - -
(208/230V) 48/51 49 / 53 62 / 67 68/73

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Outdoor Unit Model No. MCB009S4S MCB012S4S MCB018S4S MCB024S4S
ELECTRICAL DATA
Electrical Characteristics - 60 Hz - 1 Phase 208/230V 115V 208/230V 208/230V 208/230V
1MaximumOvercurrentProtection(MOCP)amps 11 18 11 16 16
2Minimumcircuitampacity(MCA) 15 30 15 20 20
CompressorRatedloadamps 15 30 15 20 20
Outdoor Fan Motor Ratedloadamps 0.4 0.4 0.4 0.4 0.4
Output-W 34 34 34 34 34
NOTE-Extremesofoperatingrangeareplusandminus10%oflinevoltage.
1HACRtypecircuitbreakerorfuse.
2RefertoNationalorCanadianElectricalCodemanualtodeterminewire,fuseanddisconnectsizerequirements.
Outdoor Unit Model No. MHB009S4S MHB012S4S MHB018S4S MHB024S4S
Nominal Size - Tons 0.75 1 1.5 2
Ambient Temperature Operating
Range - °F
Cooling 5 - 122 5 - 122 5 - 122 5 - 122
Heating 5-86 5-86 5-86 5-86
Energy Star
Sound Data (dBA) 55(115V)
54.5(208/230V)
53.5 57 60
Refrigerant (R-410A) Chargefurnished 1lb.9oz. 1lb.13oz. 2lbs.16oz. 3lbs.15oz.
Maximumlinelengthwithfurnishedcharge-ft. 25 25 25 25
Additionalchargerequiredperft.-oz. 0.16 0.16 0.16 0.32
Compressor No.andType (1)Rotary (1)Rotary (1)Rotary (1)Rotary
Refrigerantoiltype EsterOil
VG74
EsterOil
VG74
EsterOil
VG74
EsterOil
VG74
Refrigerantoilcharge-oz. 10.5 10.1 14.9 21.0
Connections - in. Liquid/Gaspipe(are) 1/4-3/8 1/4 - 1/2 1/4 - 1/2 3/8-5/8
Maximumrefrigerantpipelength-ft. 82 82 98 164
Max.differenceinlevelofindoorunit-ft. 33 33 66 82
Outdoor
Fan
(No.)Diameter-in. (1)16-1/2 (1)16-1/2 (1)17 (1)21
Totalairvolume-cfm 1294 1235 1235 1765
rpm 850/650 (115V)
(208/230V)
800/750/650 800/750/650
Outdoor Coil Numberofrows 1 1 2 2
Finsperinch 21 21 21 21
Fintype Hydrophilicaluminum
Tubeoutsidediameter-in. 1/4 1/4 1/4 1/4
Tubetype Riedcoppertubing
Netfacearea-ft.² 4.01 4.02 4.66 5.90
Design Pressure PSIG 550 / 340 550 / 340 550 / 340 550 / 340
Shipping
Data
Net/Shippingweight(lbs.)(115V) 58/64 63/68 - - - - - -
(208/230V) 55 / 61 60 / 65 74/80 98/105

9
ELECTRICAL DATA
Electrical Characteristics - 60 Hz - 1 Phase 115V 208/230V 115V 208/230V 208/230V 208/230V
1MaximumOvercurrentProtection(amps) 30 15 25 15 20 30
2Minimumcircuitampacity 20 12 18.5 15 15 19
CompressorRatedloadamps
Outdoor Fan Motor Ratedloadamps
Output-W 34 34 34 34 34 80
NOTE-Extremesofoperatingrangeareplusandminus10%oflinevoltage.
1HACRtypecircuitbreakerorfuse.
2RefertoNationalorCanadianElectricalCodemanualtodeterminewire,fuseanddisconnectsizerequirements.
4.3. MCB Cooling Capacity
4.3.1. - 009 (208/230V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb / Wet Bulb)
65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
58.54 5.93 8.97 6.18 9.54 6.54 9.99 6.81
17 8.89 6.30 9.30 6.56 9.77 6.86 10.32 7.20
25 8.90 6.42 9.46 6.79 10.02 7.16 10.57 7.50
35 9.36 6.70 9.78 6.96 10.41 7.37 10.86 7.65
47 9.51 6.87 10.01 7.19 10.62 7.58 11.12 7.90
55 9.90 7.76 10.34 8.05 10.78 8.35 11.23 8.64
65 9.74 7.58 10.19 7.89 10.77 8.29 11.34 8.68
75 9.97 7.82 10.45 8.15 10.89 8.45 11.46 8.83
85 8.90 6.89 9.31 7.17 9.91 7.58 10.43 7.94
95 8.03 6.65 8.47 6.97 8.86 7.24 9.28 7.54
105 7.42 6.35 7.88 6.71 8.35 7.07 8.88 7.48
110 7.12 6.49 7.54 6.84 7.96 7.17 8.47 7.59
115 6.69 6.29 6.97 6.53 7.39 6.89 7.82 7.24
122 6.17 6.17 6.47 6.45 6.76 6.72 7.06 6.98

10
4.3.2. - 012 (115V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb / Wet Bulb)
65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
5 10.06 7.01 10.49 7.27 11.03 7.61 11.60 7.96
17 10.15 7.22 10.71 7.57 11.31 7.95 11.94 8.34
25 10.51 7.74 11.03 8.07 11.49 8.35 12.08 8.74
35 10.50 7.87 11.01 8.20 11.55 8.56 12.23 9.00
47 10.51 7.93 10.96 8.22 11.64 8.69 12.37 9.19
55 10.88 8.34 11.39 8.70 12.00 9.11 12.50 9.44
65 10.76 8.30 11.38 8.73 11.96 9.12 12.63 9.58
75 11.11 8.70 11.59 9.03 12.15 9.42 12.75 9.83
85 10.65 8.64 11.27 9.09 11.95 9.59 12.66 10.10
95 10.69 8.79 11.17 9.14 11.69 9.53 12.41 10.07
105 9.97 8.60 10.45 8.97 10.89 9.29 11.47 9.73
110 8.90 7.81 9.29 8.11 9.85 8.56 10.43 9.02
115 7.74 7.29 8.16 7.65 8.64 8.05 9.17 8.50
122 6.61 6.56 7.03 6.95 7.46 7.34 7.88 7.73
4.3.3. - 012 (208/230V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb / Wet Bulb)
65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
5 10.30 7.18 10.73 7.44 11.29 7.79 11.86 8.14
17 10.44 7.36 10.94 7.67 11.56 8.06 12.13 8.42
25 10.56 7.73 11.22 8.17 11.87 8.59 12.47 8.98
35 10.95 7.87 11.63 8.32 12.13 8.63 12.78 9.05
47 11.10 8.22 11.62 8.56 12.27 8.99 12.90 9.40
55 11.20 8.64 11.87 9.11 12.54 9.58 13.09 9.95
65 11.42 8.76 11.95 9.11 12.48 9.46 13.28 10.01
75 11.51 9.20 12.14 9.66 12.81 10.13 13.48 10.61
85 11.02 8.74 11.58 9.12 12.06 9.45 12.82 10.00
95 10.41 8.53 10.85 8.85 11.34 9.20 12.02 9.70
105 9.71 8.40 10.27 8.84 10.76 9.20 11.31 9.61
110 8.93 7.93 9.44 8.34 10.01 8.80 10.65 9.31
115 8.51 7.96 8.88 8.26 9.31 8.60 9.82 9.03
122 7.41 7.35 7.77 7.68 8.23 8.11 8.76 8.58

11
4.3.4. - 018 (208/230V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb / Wet Bulb)
65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
516.28 11.06 17.15 11.60 18.03 12.13 19.14 12.81
17 16.50 11.61 17.54 12.26 18.56 12.90 19.47 13.46
25 17.34 12.38 18.38 13.07 19.25 13.60 20.48 14.40
35 18.72 14.06 19.65 14.68 20.46 15.22 21.41 15.84
47 16.29 12.42 17.13 12.98 17.91 13.51 18.90 14.17
55 16.05 12.11 16.76 12.56 17.77 13.24 18.84 13.96
65 15.99 12.25 16.98 12.92 17.98 13.61 18.79 14.15
75 16.27 12.62 17.22 13.27 17.97 13.78 18.74 14.30
85 15.90 12.73 16.73 13.33 17.43 13.81 18.31 14.45
95 15.28 12.44 16.07 13.01 16.81 13.52 17.88 14.31
105 14.08 11.94 14.71 12.41 15.55 13.04 16.37 13.65
110 12.71 11.61 13.26 12.07 13.89 12.57 14.76 13.28
115 11.15 10.19 11.64 10.58 12.35 11.18 12.87 11.59
122 9.33 9.34 9.86 9.83 10.32 10.25 10.96 10.83
4.3.5. - 024 (208/230V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb / Wet Bulb)
65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
519.87 14.01 20.87 14.63 21.90 15.27 22.91 15.90
17 20.41 14.35 21.33 14.91 22.62 15.73 23.89 16.53
25 20.79 14.71 21.93 15.41 22.98 16.07 24.45 17.02
35 21.88 15.85 22.82 16.43 23.92 17.13 24.99 17.79
47 20.96 15.18 22.14 15.93 23.45 16.80 24.87 17.71
55 21.22 16.15 22.29 16.88 23.69 17.84 24.67 18.48
65 20.93 15.75 21.81 16.31 23.08 17.18 24.50 18.15
75 20.81 16.09 21.95 16.87 23.11 17.67 24.32 18.48
85 20.05 15.53 21.02 16.18 22.15 16.95 23.44 17.86
95 19.73 15.81 20.57 16.39 21.50 17.04 22.68 17.87
105 17.79 15.23 18.61 15.85 19.72 16.70 20.86 17.59
110 16.07 14.43 16.86 15.05 17.88 15.87 18.78 16.58
115 14.16 13.53 14.79 14.08 15.60 14.75 16.34 15.36
122 11.75 11.76 12.47 12.43 13.08 12.99 13.89 13.72

12
4.4. MHB Cooling Capacity
4.4.1. - 009 (115V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb / Wet Bulb)
65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
58.92 6.28 9.46 6.62 9.97 6.94 10.47 7.26
17 9.50 6.86 9.97 7.16 10.54 7.53 10.98 7.79
25 9.76 6.91 10.29 7.24 10.72 7.50 11.28 7.85
35 10.02 7.14 10.66 7.56 11.12 7.84 11.60 8.14
47 9.73 7.28 10.20 7.59 10.78 7.98 11.39 8.38
55 9.80 7.31 10.22 7.58 10.67 7.87 11.16 8.19
65 9.17 7.25 9.68 7.62 10.30 8.06 10.93 8.51
75 9.10 7.10 9.65 7.49 10.09 7.79 10.70 8.22
85 8.80 6.96 9.30 7.31 9.74 7.61 10.19 7.92
95 8.55 7.12 9.00 7.46 9.44 7.78 9.90 8.12
105 7.93 6.84 8.42 7.22 8.91 7.60 9.47 8.04
110 7.81 6.93 8.18 7.23 8.65 7.61 9.11 7.97
115 7.48 6.99 7.82 7.26 8.21 7.57 8.58 7.87
122 6.86 6.84 7.28 7.22 7.61 7.52 8.00 7.87
4.4.2. - 009 (208/230V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb / Wet Bulb)
65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
5 9.42 6.54 9.89 6.84 10.45 7.18 10.95 7.49
17 9.26 6.53 9.78 6.86 10.33 7.21 10.85 7.53
25 9.98 7.24 10.46 7.54 10.91 7.82 11.37 8.09
35 10.30 7.75 10.77 8.06 11.35 8.45 11.84 8.76
47 9.92 7.40 10.53 7.81 11.03 8.13 11.66 8.55
55 9.80 7.31 10.42 7.74 11.04 8.16 11.55 8.49
65 9.63 7.53 10.25 7.97 10.84 8.39 11.45 8.80
75 9.64 7.66 10.21 8.06 10.86 8.53 11.34 8.87
85 9.31 7.33 9.71 7.59 10.12 7.87 10.66 8.24
95 8.62 6.92 9.17 7.32 9.56 7.59 10.14 8.00
105 8.33 6.93 8.76 7.26 9.29 7.65 9.71 7.94
110 8.04 7.34 8.40 7.62 8.86 7.99 9.33 8.36
115 7.69 7.10 8.06 7.40 8.46 7.73 8.87 8.07
122 7.28 7.26 7.67 7.61 7.99 7.90 8.34 8.21

13
4.4.3. - 012 (115V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb / Wet Bulb)
65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
5 11.06 7.60 11.52 7.88 12.00 8.16 12.77 8.64
17 11.13 7.91 11.67 8.26 12.41 8.74 13.16 9.21
25 11.35 8.08 11.92 8.44 12.59 8.86 13.32 9.32
35 11.43 8.33 12.02 8.71 12.71 9.16 13.45 9.64
47 11.14 8.16 11.62 8.45 12.17 8.81 12.90 9.28
55 11.02 8.40 11.63 8.82 12.31 9.29 12.92 9.70
65 11.04 8.37 11.65 8.79 12.34 9.26 12.93 9.65
75 11.02 8.63 11.65 9.08 12.19 9.46 12.94 9.98
85 11.01 8.65 11.49 8.97 12.06 9.36 12.79 9.87
95 11.01 8.95 11.49 9.29 12.06 9.69 12.57 10.05
105 10.47 8.76 11.04 9.19 11.53 9.54 12.05 9.92
110 9.79 8.97 10.40 9.46 11.05 9.99 11.57 10.41
115 9.54 9.06 10.11 9.54 10.54 9.89 10.99 10.25
122 8.77 8.74 9.28 9.21 9.69 9.58 10.11 9.94
4.4.4. - 012 (208/230V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb / Wet Bulb)
65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
5 10.60 7.36 11.12 7.68 11.81 8.12 12.38 8.46
17 10.94 7.97 11.45 8.29 12.14 8.75 12.67 9.09
25 10.97 7.87 11.51 8.21 12.20 8.66 12.90 9.11
35 11.25 8.46 11.96 8.94 12.52 9.31 13.13 9.70
47 11.03 8.07 11.72 8.53 12.47 9.02 13.22 9.51
55 11.34 8.61 11.91 9.01 12.45 9.37 13.17 9.85
65 11.12 8.62 11.72 9.04 12.37 9.49 13.12 10.01
75 11.32 8.85 11.84 9.20 12.51 9.67 13.07 10.04
85 11.36 8.83 11.95 9.23 12.49 9.59 13.22 10.09
95 11.35 9.35 11.96 9.80 12.63 10.29 13.40 10.85
105 11.10 9.56 11.71 10.02 12.34 10.51 12.89 10.92
110 10.85 9.92 11.30 10.28 11.79 10.67 12.32 11.09
115 9.98 9.28 10.58 9.77 11.09 10.19 11.66 10.66
122 9.38 9.32 9.81 9.71 10.34 10.20 10.91 10.70

14
4.4.5. - 018 (208/230V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb / Wet Bulb)
65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
5 14.73 10.34 15.39 10.74 16.20 11.25 17.20 11.87
17 14.89 10.53 15.60 10.96 16.56 11.58 17.36 12.08
25 14.97 10.82 15.76 11.31 16.67 11.91 17.72 12.60
35 15.90 11.36 16.61 11.81 17.34 12.26 18.14 12.77
47 16.09 12.22 16.90 12.77 17.63 13.25 18.75 14.01
55 16.37 12.77 17.05 13.23 17.97 13.88 19.09 14.68
65 16.43 12.98 17.41 13.66 18.48 14.43 19.45 15.10
75 16.97 13.08 17.77 13.62 18.83 14.34 19.80 14.98
85 16.82 13.69 17.88 14.47 18.90 15.20 19.73 15.78
95 16.48 13.55 17.45 14.28 18.47 15.04 19.30 15.63
105 16.02 13.31 16.77 13.86 17.60 14.47 18.60 15.20
110 15.19 13.58 16.16 14.37 16.92 14.96 17.76 15.62
115 14.42 13.33 15.23 14.00 15.93 14.56 16.59 15.10
122 13.11 13.07 13.87 13.76 14.69 14.53 15.33 15.10
4.4.6. - 024 (208/230V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb / Wet Bulb)
65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
Total
mBtuh
Sensible
mBtuh
5 20.55 14.54 21.75 15.30 23.04 16.12 24.28 16.87
17 21.20 15.08 22.15 15.68 23.15 16.29 24.50 17.15
25 21.47 15.78 22.84 16.68 23.89 17.37 25.07 18.13
35 22.71 16.55 23.66 17.15 24.64 17.78 25.72 18.44
47 21.85 15.79 23.13 16.61 24.37 17.39 25.57 18.16
55 22.22 17.04 23.52 17.96 24.50 18.60 26.00 19.63
65 22.10 16.71 23.51 17.69 24.90 18.65 26.46 19.69
75 22.93 18.26 24.24 19.20 25.38 20.00 26.89 21.08
85 21.85 17.23 23.02 18.07 24.41 19.07 25.94 20.13
95 20.88 16.61 22.05 17.43 23.33 18.36 24.61 19.25
105 20.21 16.92 21.34 17.77 22.33 18.47 23.73 19.53
110 19.38 17.26 20.49 18.16 21.61 19.04 22.89 20.08
115 18.64 17.64 19.58 18.42 20.39 19.10 21.63 20.16
122 17.33 17.19 18.28 18.06 19.13 18.81 20.22 19.81

15
4.5. MHB Heating Capacity
4.5.1. - 009 (115V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb )
60°F 65°F 70°F 75°F
Total
mBtuh
Total
mBtuh
Total
mBtuh
Total
mBtuh
5 6.07 5.87 5.68 5.43
10 6.92 6.73 6.53 6.25
17 7.92 7.65 7.42 7.16
20 8.22 7.98 7.74 7.40
25 8.53 8.25 8.04 7.71
32 8.77 8.54 8.33 7.96
35 9.12 8.90 8.66 8.28
40 10.15 9.90 9.66 9.26
45 11.29 10.95 10.65 10.28
50 11.83 11.47 11.16 10.73
57 12.40 12.01 11.61 11.19
4.5.2. - 009 (208/230V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb )
60°F 65°F 70°F 75°F
Total
mBtuh
Total
mBtuh
Total
mBtuh
Total
mBtuh
5 6.43 6.21 6.00 5.74
10 7.20 7.02 6.79 6.52
17 8.14 7.92 7.71 7.43
20 8.67 8.39 8.19 7.89
25 9.26 8.98 8.70 8.32
32 9.74 9.43 9.17 8.85
35 10.26 9.94 9.66 9.22
40 10.88 10.57 10.22 9.84
45 11.37 11.06 10.75 10.26
50 11.92 11.53 11.18 10.69
57 12.38 12.07 11.72 11.29
4.5.3. - 012 (115V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb )
60°F 65°F 70°F 75°F
Total
mBtuh
Total
mBtuh
Total
mBtuh
Total
mBtuh
5 7.49 7.25 7.01 6.71
10 7.94 7.74 7.53 7.27
17 8.53 8.28 8.06 7.70
20 9.31 9.07 8.76 8.46
25 10.12 9.82 9.51 9.09
32 10.85 10.52 10.21 9.76
35 11.67 11.34 10.99 10.55
40 12.66 12.31 11.94 11.41
45 13.61 13.20 12.88 12.30
50 14.26 13.83 13.45 12.93
57 14.91 14.48 14.04 13.50
4.5.4. - 012 (208/230V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb )
60°F 65°F 70°F 75°F
Total
mBtuh
Total
mBtuh
Total
mBtuh
Total
mBtuh
5 8.46 8.17 7.94 7.62
10 9.10 8.83 8.55 8.21
17 9.65 9.33 9.07 8.70
20 10.10 9.83 9.56 9.14
25 10.65 10.33 10.05 9.70
32 11.17 10.83 10.53 10.05
35 11.74 11.35 10.99 10.53
40 13.36 12.95 12.53 12.09
45 14.77 14.31 13.92 13.36
50 15.46 15.05 14.59 13.95
57 16.14 15.66 15.17 14.62

16
4.5.5. - 018 (208/230V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb )
60°F 65°F 70°F 75°F
Total
mBtuh
Total
mBtuh
Total
mBtuh
Total
mBtuh
5 11.39 11.03 10.76 10.37
10 12.30 12.00 11.71 11.24
17 13.38 13.02 12.60 12.12
20 14.42 14.04 13.62 13.04
25 15.57 15.04 14.60 14.08
32 16.54 16.10 15.59 14.95
35 17.66 17.08 16.67 15.97
40 18.89 18.28 17.72 16.92
45 19.69 19.11 18.59 17.81
50 20.44 19.79 19.14 18.41
57 20.83 20.26 19.71 18.86
4.5.6. - 024 (208/230V)
Outdoor
Temperature - °F
(Dry Bulb)
Indoor Temperature - °F (Dry Bulb )
60°F 65°F 70°F 75°F
Total
mBtuh
Total
mBtuh
Total
mBtuh
Total
mBtuh
5 16.10 15.57 15.09 14.50
10 17.62 17.11 16.66 15.93
17 19.25 18.74 18.14 17.40
20 20.20 19.58 19.02 18.34
25 21.20 20.57 19.87 19.00
32 21.99 21.24 20.73 19.88
35 22.71 22.11 21.53 20.56
40 26.02 25.17 24.32 23.25
45 28.31 27.52 26.69 25.76
50 29.03 28.27 27.44 26.34
57 29.90 29.11 28.29 27.16

17
4.6. Outdoor Unit Dimensions (MCB and
MHB)
FRONT VIEW SIDE VIEW
TOP VIEW
1-7/8
(48)
3/8 (10)
28-5/8 (727)
17-3/4 (451)
28-3/8 (720)
2-3/4 (70)
DRAIN HOLE (bottom of unit)
10-5/8 (270)
19-1/2
(495)
2-3/8 (60)
3-3/8 (86)
1/4
(6)
10
(254)
11-1/8
(283)
9-5/8
(244)
Figure 8. 09 and 12K Outdoor Unit Dimensions -
Inches (mm)
FRONT VIEW SIDE VIEW
TOP VIEW
DRAIN HOLE (bottom of unit)
2-1/2
(63)
3/8 (10)
12-3/8
(314)
11-1/4
(286)
30-7/8 (784)
21-7/8
(556)
17-3/4 (451)
30-1/8 (765)
2-3/4 (70)
2-3/8 (60)
3-5/8 (92)
11-7/8 (302)
Figure 9. 18K Outdoor Unit Dimensions - Inches
(mm)
DRAIN HOLE (bottom of unit)
FRONT VIEW SIDE VIEW
TOP VIEW
12-1/8
(308)
32-1/8 (816)
20-1/8 (511)
31-3/4 (806)
2-3/4 (70)
1-1/4 (32)
12-1/2
(318)
13-5/8
(346)
21-7/8
(556)
13 (330)
2-3/8 (60)
3-3/4 (95)
1 (25)
Figure 10. 124K Outdoor Unit Dimensions - Inches
(mm)
4.7. Outdoor Unit Clearances
4.7.1. Single Units
24 (610)
Air Outlet
Air Inlet
24
(610)
12
(305) 79
(2007)
1
12
(305)
1Minimum rear clearance can be 6 inches (152 mm) when mounted on brackets
and with no obstructions on the other three sides.
Figure 11. Single Outdoor Unit Clearances - Inches
(mm)

18
4.7.2. Multiple Units
Height of
Wall (C)
Unit
Height (A)
118 (2997)
(Minimum)
Unit to
Wall (B)
24 (610)
(Minimum)
60 (1500)
(Minimum)
10 (254)
(Minimum)
10 (254)
(Minimum)
AIR
FLOW
AIR
FLOW
CLEARANCE NOTES FOR MUL
TIPLE UNITS:
If the height of the wall (C) is less than or equal to the height of the smallest unit (A), the distance from the unit to the
wall (B) must be a minimum of 10 inches
(254 mm).
If 1/2 the height of the unit (A) is less than the height of the wall (C), the distance from the unit to the wall (B) must be
a minimum of 12 inches (305 mm).
If the height of the wall (C) is greater than the height of the unit (A), the distance from the unit to the wall (B) must be a
minimum of 20 inches (508 mm).
NOTE: It is recommended that the single clearance
be followed in a multi-unit applications. If not then
these are the maximum and minimum clearances
you are allowed.
Figure 12. Multiple Outdoor Unit Clearances - Inches (mm)

19
5. Refrigeration Pipe Work
5.1. Single-Zone Refrigerant Cycle Diagram
INDOOR OUTDOOR
LIQUID SIDE
GAS SIDE
(EVAPORATOR)
(CONDENSER)
COMPRESSOR
CAPILIARY TUBE
CN9 (T2) Evaporator
temp. sensor
CN8 (T1) Room temp.
sensor
T5 - Discharge Temp
Sensor
T3 - Condenser Temp
Sensor
T4 - Ambient Temp
Sensor
5.2. Single-Zone Piping Limitations
OUTDOOR UNIT
OUTDOOR UNIT
INDOOR UNIT
INDOOR UNIT
Maximum Line Set
Length Maximum LineSet
Length
Maximum
Elevation -
Outdooor
Unit BELOW
Indoor Unit
Maximum
Elevation -
Outdooor
Unit ABOVE
Indoor Unit
Minimum Line Set
Length - 10 ft. (3m)
Minimum Line Set
Length - 10 ft. (3m)
Outside Unit BELOW Indoor Unit Outside Unit ABOVE Indoor Unit
Do not allow for excess length of line sets to be left rolled up as part of the
required distance, or in general. This will also cause additional performance issues.
IMPORTANT

20
5.3. Add Refrigerant after Long-Term
System Operation
• Connectthechargehosetothethree-way
serviceportandopenthetwo-wayandthree-
wayvalve.
• Connectthechargehosetothevalveat
thebottomofthecylinder.Iftherefrigerant
isR-410A,placethecylinderbottom-upto
ensureliquidcharge.
• Purgetheairfromthechargehose.
• Openthevalveatthebottomofthecylinder
andpressthecheckvalveonthecharge
settopurgetheair(becarefuloftheliquid
refrigerant).
• Placethechargingcylinderontotheelectronic
scaleandrecordtheweight.
• Turnontheairconditionerincoolingmode.
• Openthevalves(Lowside)onthechargeset
andchargethesystemwithliquidrefrigerant.
• Whentheelectronicscaledisplaystheproper
weight(refertothegaugeandthepressure
ofthelowside),disconnectthechargehose
fromthethree-wayvalve’sserviceport
immediatelyandturnofftheairconditioner
beforedisconnectingthehose.
• Mountthevalvestemcapsandtheservice
port.Usetorquewrenchtotightentheservice
portcaptoatorqueof18N.m(13.27ft·lbs).
• Besuretocheckforgasleaks.
5.4. Servicing Indoor Unit Refrigeration
Circuit
5.4.1. Collecting Refrigerant into Outdoor Unit
• Conrmthatboththetwo-wayandthree-way
valvesaresettotheopenedposition
• Removethevalvestemcapsandconrmthat
thevalvestemsareintheopenedposition.
• Besuretouseahexagonalwrenchtooperate
thevalvestems.
• Connectthechargehosewiththepushpinof
handlelotothethree-wayvalvesgasservice
port.
• Airpurgingofthechargehose-Openthe
handleLovalveofthemanifoldvalveslightly
topurgeairfromthechargehoseforve
secondsandthencloseitquickly.
• Setthetwo-wayvalvetothecloseposition.
• Operatetheairconditioneratthecooling
cycleandstopitwhenthegaugeindicates
0.1MPa(14psi).
• Setthethree-wayvalvetotheclosed
positionimmediately
• Dothisquicklysothatthegaugeendsup
indicating0.3to0.5Mpa(43-72psi).
• Disconnectthechargeset,andtightenthe
two-wayandthree-wayvalve’sstemnuts.
• Useatorquewrenchtotightenthethree-way
valvesserviceportcaptoatorqueof18N.m.
• Besuretocheckforgasleakage.
5.4.2. Air Purging with Vacuum Pump
• Completelytightenthearenutsoftheindoor
andoutdoorunits,conrmthatboththe
two-wayandthree-wayvalvesaresettothe
closedposition.
• Connectthechargehosewiththepushpinof
handlelotothethree-wayvalvesgasservice
port.
• Connectthechargehoseofhandlehi
connectiontothevacuumpump.
• FullyopenthehandleLoofthemanifold
valve.
• Operatethevacuumpumptoevacuate.
• Makeevacuationfor30minutesandcheck
whetherthecompoundmeterindicates-
0.1Mpa(500microns).Ifthemeterdoes
notindicate-0.1Mpa(500microbars)after
pumping30minutes,itshouldbepumped20
minutesmore.Ifthepressurecan’tachieve
-0.1Mpa(500microbars)afterpumping50
minutes,pleasecheckiftherearesome
leakagepoints.
• FullyclosethehandleLovalveofthemanifold
valveandstoptheoperationofthevacuum
pump.Conrmthatthegaugeneedledoes
notmove(approximatelyveminutesafter
turningoffthevacuumpump).
• Turnthearenutofthethree-wayvalves
about45°counterclockwiseforsixorseven
secondsafterthegascomingout,thentighten
thearenutagain.Makesurethepressure
displayinthepressureindicatorisalittle
higherthantheatmospherepressure.Then
removethechargehosefromthethree-way
valve.
• Fullyopenthetwo-wayvalveandthree-way
valveandsecurelytightenthecapofthe
three-way