Lennox MWMC Service Manual Download Page 7

Page: 7 / 104

1.6. M22A and M33C Indoor Unit Clearances

23-5/8 (600)

(Ceiling Opening)

INSTALLATION

HANGERS

LEVELING

ADJUSTMENT

NUT (4)

CEILING

DIFFUSER

PANEL

AIR

OUTLET

AIR

OUTLET

AIR

INLET

36”

(914 mm)

36”

(914 mm)

36”

(914 mm)

36”

(914 mm)

Minimum Clearance from Structural Ceiling to Drop Ceiling:

M22A009, M22A012, M22A018 and M33C024 -- 10-1/4” (260 mm)

Minimum Clearance to Floor

(all models and sizes) - 98-1/2” (2500 mm)

M33C036 and M33C048 -- 13” (330 mm)

Summary of Contents for MWMC

Page 1: ...ns 009 012 Ton Units 23 3 3 Indoor Unit Specifications 018 030 Ton Units 23 3 4 Indoor Unit Specifications 3WMC 23 3 5 Indoor Unit Dimensions MWMC and 3WMC 24 3 6 Indoor Unit Clearances All Models and...

Page 2: ...tion Pipe Work 65 11 1 MPC and 3PC Single Zone Refrigerant Cycle Diagram 65 11 2 MPC Two Zone Refrigerant Cycle Diagram 65 11 3 MPC Three Zone Refrigerant Cycle Diagram 66 11 4 MPC Four Zone Refrigera...

Page 3: ...024 2 tons 036 3 tons 048 4 tons Refrigerant Type 4 R 410A Minor Design Sequence 1 1st Revision 2 2nd Revision 1 2 M22A Indoor Unit Specifications Model No M22A009S4 P M22A012S4 P M22A018S4 P Nominal...

Page 4: ...utput W 45 125 125 Room Temperature Range F Cooling 60 90 60 90 60 90 Heating 32 86 32 86 32 86 Air Volume cfm High Medium Low 706 635 547 947 853 753 1171 1059 935 Sound Data dBA Low Medium High 43 4...

Page 5: ...CONNECTION LIQUID PIPE GAS PIPE 22 1 2 572 21 1 2 546 20 5 8 524 22 1 2 572 10 3 8 264 23 5 8 600 Ceiling Opening INSTALLATION HANGERS LEVELING ADJUSTMENT NUT 4 CEILING DIFFUSER PANEL AIR OUTLET AIR...

Page 6: ...LET AIR OUTLET AIR INLET BOTTOM VIEW Panel 37 3 8 949 37 3 8 949 5 1 2 139 4 102 DRAIN CONNECTION 32 5 8 829 26 3 8 670 26 3 8 670 32 5 8 829 30 3 8 772 CONTROL BOX HANGING BRACKETS 4 CONDENSATE PUMP...

Page 7: ...MENT NUT 4 CEILING DIFFUSER PANEL AIR OUTLET AIR OUTLET AIR INLET 36 914 mm 36 914 mm 36 914 mm 36 914 mm Minimum Clearance from Structural Ceiling to Drop Ceiling M22A009 M22A012 M22A018 and M33C024...

Page 8: ...ensation Adjustment S1 S2 CCM Address VRF only SW5 For Mode Conflict Setting 24k and smaller units only Figure 1 M22A Main Control Switches SW2 Indoor Fan Speed Adjustment SW3 Auto Restart Function SW...

Page 9: ...3 Drain should be as short as possible and should not have any droops or kinks that would restrict condensate flow and shall be approved resistant pipe NOTE There must be a 2 inch 51 mm space between...

Page 10: ...ication M MD B 012 S 4 1 P Unit Type MD Medium Static Ducted Unit Series Type M Mini Split Voltage P 208 230V 1 phase 60hz Cooling Efficiency S Standard Efficiency Major Design Sequence A 1st Generati...

Page 11: ...d Gas o d flare in 1 4 3 8 1 4 1 2 1 4 1 2 Drain connection o d in 1 1 1 Net Shipping weights lbs 38 49 38 49 54 66 Model No MMDB024S4 MMDB036S4 MMDB048S4 Nominal Tons 2 3 4 Power Supply 60 hz 1 phase...

Page 12: ...5 235 175 120 60 0 0 04 0 20 0 16 0 12 0 10 0 08 SP2 Limit airflow rate setting on the controller High Medium Low SP2 Limit Air Volume cfm External Static Pressure in w g 470 530 590 645 705 410 355 2...

Page 13: ...60 0 0 04 0 20 0 16 0 12 0 10 0 08 SP2 Limit airflow rate setting on the controller High Medium Low SP2 Limit Air Volume cfm External Static Pressure in w g 470 530 590 645 705 410 355 295 235 175 120...

Page 14: ...t L o w High Air Volume cfm 1060 940 825 705 590 470 355 235 120 0 0 04 0 40 0 32 0 24 0 16 0 64 0 48 0 56 0 10 SP3 Limit Low Medium High Air Volume cfm 1060 940 825 705 590 470 355 235 120 0 0 04 0 4...

Page 15: ...al Static Pressure in w g 1060 1294 1410 1530 1175 940 825 705 590 470 355 235 120 0 0 04 0 40 0 32 0 24 0 16 0 64 0 48 0 56 0 10 SP3 Limit Low Medium High Air Volume cfm External Static Pressure in w...

Page 16: ...0 32 0 24 0 16 0 48 0 56 0 64 0 10 SP3 Limit airflow rate setting on the controller Air Volume cfm External Static Pressure in w g 1060 1295 1410 1530 2120 2000 1885 1765 1650 1175 940 825 705 590 470...

Page 17: ...75 940 825 705 590 470 355 235 120 0 0 04 0 40 0 32 0 24 0 16 0 48 0 56 0 64 0 72 0 80 0 10 SP2 Limit airflow rate setting on the controller Air Volume cfm 2470 2355 2235 External Static Pressure in w...

Page 18: ...02 7 7 8 200 19 7 8 505 17 3 4 451 30 3 4 781 5 3 8 137 21 1 8 537 1 1 8 29 018 34 5 8 879 8 1 4 210 26 1 2 673 23 5 8 600 37 7 8 962 5 1 2 140 27 3 4 705 2 51 024 43 1 4 1099 9 3 4 248 30 1 2 775 27...

Page 19: ...Air Flow 24 610 Minimum Service Clearance TOP VIEW MEDIUM STATIC DUCTED UNIT FRONT VIEW 1 25 Minimum Clearance top Ceiling Wall Wall 1 25 Minimum Clearance bottom Ceiling Suspended NOTE Bottom unit c...

Page 20: ...ion point ground open drain etc to ensure that the line will drain freely SUSPENSION RODS DRAIN LINE STRUCTURAL CEILING 8 in 203 mm Max 28 in SUPPORT STRAPS 3 ft 1 m Figure 7 Condensate Drain with Pum...

Page 21: ...sate flow and shall be approved resistant pipe There must be a 2 inch space between the end of the condensate drain and the final termination point ground open drain etc to ensure that the line will d...

Page 22: ...n Nominal Cooling Capacity 006 50 tons 009 75 tons 012 1 tons 018 1 5 tons 024 2 tons 030 2 5 tons Refrigerant Type 4 R 410A Minor Design Sequence 1 1st Revision 2 2nd Revision 3 WM C 036 S 4 1 P Unit...

Page 23: ...be minor revision 1 or 2 Model No MWMC018S4 P MWMC024S4 P MWMC030S4 P Nominal Tons 1 5 2 2 5 Power Supply 60 hz 1 phase 208 230V 208 230V 208 230V Rated load amps 0 13 0 5 0 5 Output W 30 58 58 Room T...

Page 24: ...4S P MWMC009S4S P MWMC012S4S P 32 7 8 835 11 279 29 1 4 743 7 7 8 200 MWMC018S4S P 39 991 12 3 8 314 34 3 4 883 8 5 8 210 MWMC024S4S P MWMC030S4S P 46 3 4 1187 13 1 2 343 42 1 2 1080 10 1 4 260 BOTTOM...

Page 25: ...m Minimum Clearance Ceiling Wall Floor 5 127 mm Minimum 3 7 MWMC and 3WMC036S4 Unit Control Board Switches Location SW2 Indoor Fan Speed Adjustment SW3 Auto Restart Function SW1 Pre Heat Function Adju...

Page 26: ...form test run after you have completed the following steps Electrical Safety Checks Confirm that the unit s electrical system is safe and operating properly Gas Leak Checks Check all flare nut connect...

Page 27: ...e COOL function Manual control button AUTO COOL Figure 13 Manual Control Button Location Lift the front panel of the indoor unit and raise it until it clicks in place The MANUAL CONTROL button is loca...

Page 28: ...2 Indoor Unit Specifications 018 048 Ton Units Model No MCFB018S4 P MCFA024S4 P MCFA036S4 P MCFA048S4 P Nominal Tons 1 5 2 3 4 Power Supply 60 hz 1 phase 208 230V 208 230V 208 230V 208 230V Rated loa...

Page 29: ...100 x 100 Condensate Drain Outlets 4 each corner FRONT VIEW BOTTOM VIEW SIDE VIEW BACK VIEW A B 8 3 4 222 9 1 4 235 26 5 8 676 MCFB018S4 MCFA024S4 MCFA036S4 MCFA048S4 2 1 4 57 2 51 Refrigerant Piping...

Page 30: ...SIDE VIEW SUPPLY AIR SUPPLY AIR 59 1499 Service Clearance Front of Unit DROP CEILING 3 4 19 WALL WALL CEILING APPLICATIONS CEILING AND FLOOR APPLICATIONS FLOOR APPLICATIONS Unit Flush with Wall 59 149...

Page 31: ...2 Indoor Fan Speed Adjustment SW3 Auto Restart Function SW1 Pre Heat Function Adjustment SW6 Heating Temperature Compensation Adjustment S1 S2 CCM Address VRF only SW5 For Mode Conflict Setting 24k an...

Page 32: ...minal Tons 1 Power Supply 60 hz 1 phase 208 230V Rated load amps 1 Output W 20 Room Temperature Range F Cooling 62 90 Heating 32 86 Air Volume cfm High Medium Low 365 318 248 Sound Data dBA Low Medium...

Page 33: ...5 8 600 7 11 16 195 Condensate Drain Outlet Refrigerant Piping Figure 15 MFMA Indoor Unit Dimensions Inches mm 5 4 Indoor Unit Clearances FRONT VIEW SIDE VIEW 4 102 WALL SUPPLY AIR 40 1016 Service Cle...

Page 34: ...specified wiring and cable to make electrical connections Clamp cables securely and make sure that connections are tight to avoid strain on wiring Insecure wiring connections may result in equipment f...

Page 35: ...to Outdoor Wiring Communication Power 1 2 3 and GND 24K 208 230 VAC 4 Stranded 16AWG 4 Stranded unshielded Outdoor to Main Power L1 L2 and GND 24K 208 230 VAC 3 Stranded MCA 20A 12AWG 3 Indoor to Outd...

Page 36: ...ND 18K 208 230VAC 4 Stranded and unshielded 16AWG Outdoor to Main Power L1 L2 and GND 18K 208 230VAC 3 Stranded and unshielded 14AWG 18A Indoor to Outdoor Wiring Communication Power 1 2 3 and GND 24K...

Page 37: ...or Unit Outdoor Unit Indoor Unit Figure 17 Single Zone Wiring 30K and Below L2 1 A 3 A 2 A 1 B 3 B 2 B 208 230V Outdoor Unit Terminal Block Terminal Block 1 2 3 208 230V Indoor Unit A Terminal Block 1...

Page 38: ...208 230V Indoor Unit To Indoor Unit A To Indoor Unit B Figure 19 Multi Zone Wiring From Power Supply Indoor Unit CommunicationTerminal Block L1 L2 Power Terminal Block 208 230V Outdoor Unit L1 L2 L1...

Page 39: ...ss Remote The provided mini split wireless controller model RG10B DCFC is a wireless local controller for Lennox mini split indoor unit models M22A MFMA MCFA and MCFB only 7 3 22U52 Wireless Remote Th...

Page 40: ...he 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 1 2 ON 0 8 4 1 2 3 5 6 7 C 9 A B D E F 1 2 ON 0 8 4 1 2 3 5 6 7 C 9 A B D E F 1 2 ON 0 8 4 1 2 3 5 6 7 C 9 A B...

Page 41: ...oard These dry contacts allow the external device to turn the indoor unit on or off Dry contacts can be used for alarm notice that float switch tripped etc Remote on off ports Central control ports VR...

Page 42: ...P Heat Pump Series Type M Mini Split Cooling Efficiency S Standard Efficiency Major Design Sequence A 1st Generation B 2nd Generation C 3rd Generation Nominal Cooling Capacity 009 0 75 tons 012 1 tons...

Page 43: ...erence in level of indoor unit ft 33 33 66 Outdoor Fan No Diameter in 16 1 2 16 1 2 16 1 2 Total air volume cfm 1295 1295 1765 rpm 800 800 810 Outdoor Coil Number of rows 2 2 3 Fins per inch 21 21 19...

Page 44: ...13 Max difference in level of indoor unit ft 82 82 98 98 Outdoor Fan s No Diameter in 1 22 1 22 1 22 2 22 Total air volume cfm 2235 2235 2120 4500 rpm 900 900 1050 900 Outdoor Coil Number of rows 2 6...

Page 45: ...ft 98 Outdoor Fan s No Diameter in 1 22 Total air volume cfm 2235 rpm 1150 Outdoor Coil Number of rows 3 Fins per inch 18 Fin type Hydrophilic aluminum Tube outside diameter in 5 16 Tube type Rifled...

Page 46: ...ax difference in level of indoor unit ft 33 33 65 82 Outdoor Fan No Diameter in 1 17 1 17 1 19 1 22 Total air volume cfm 1120 1180 1355 2355 rpm 810 810 850 810 Outdoor Coil Number of rows 2 2 2 2 Fin...

Page 47: ...Max difference in level of indoor unit ft 98 98 Outdoor Fan No Diameter in 2 22 2 22 Total air volume cfm 4470 4470 rpm 900 900 Outdoor Coil Number of rows 2 2 Fins per inch 18 18 Fin type Hydrophilic...

Page 48: ...n area sq ft 235 345 355 515 355 515 Design Pressure PSIG 540 340 540 340 540 340 Shipping Data Net Shipping weight lbs 100 109 140 151 140 151 ELECTRICAL DATA Electrical Characteristics 60 Hz 1 Phase...

Page 49: ...ng Data Net Shipping weight lbs 169 181 224 255 ELECTRICAL DATA Electrical Characteristics 60 Hz 1 Phase 208 230V 208 230V 2 Maximum Over current Protection amps 40 50 3 Minimum circuit ampacity 25 35...

Page 50: ...0 Design Pressure PSIG 540 340 540 340 550 340 Shipping Data Net Shipping weight lbs 138 149 168 180 239 270 ELECTRICAL DATA Electrical Characteristics 60 Hz 1 Phase 208 230V 208 230V 208 230V 2 Maxim...

Page 51: ...n indoor units ft 33 Outdoor Fan No Diameter in 2 22 Total air volume cfm 4500 rpm 800 700 600 Outdoor Coil Number of rows 2 Fins per inch 18 Fin type Hydrophilic aluminum Tube outside diameter in 3 8...

Page 52: ...5 7 8 18 mm 946 673 810 403 457 MPC048S4S P inches 41 1 8 27 7 8 44 5 8 16 3 8 15 7 8 mm 1045 708 1134 416 448 MLB009S4S P MLB012S4S P inches 34 3 8 20 1 8 21 7 8 12 1 8 12 1 2 mm 873 511 566 308 318...

Page 53: ...P MPC030S4M P MPC036S4M P inches 40 3 4 26 1 2 31 7 8 16 1 8 15 7 8 mm 1035 673 810 410 403 MPC048S4M P inches 41 3 4 25 52 1 2 16 3 8 17 5 8 mm 1060 635 1334 416 448 MLB018S4M P MLB030S4M P inches 4...

Page 54: ...05 1 Minimum rear clearance can be 6 inches 152 mm when mounted on brackets and with no obstructions on the other three sides Air Outlet Air Inlet 12 305 24 610 24 610 1 12 305 79 2007 1 Minimum rear...

Page 55: ...e 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 t...

Page 56: ...0 12 600 12K 18K 10 000 15 000 11 600 17 400 18K 18K 14 000 14 000 14 800 14 800 3 6K 6K 6K 7 000 7 000 7 000 8 500 8 500 8 500 6K 6K 9K 7 000 7 000 10 000 7 700 7 700 11 500 6K 6K 12K 6 000 6 000 13...

Page 57: ...500 5 500 22 000 5 800 5 800 23 200 6K 9K 12K 6 200 9 300 12 500 6 600 9 800 13 100 6K 9K 18K 5 700 8 600 17 200 6 100 9 100 18 100 6K 9K 24K 5 300 7 900 21 100 5 600 8 400 22 200 6K 12K 12K 6 000 12...

Page 58: ...K 36K 8 000 33 000 8 600 34 500 12K 24K 11 000 23 000 12 400 24 800 12K 30K 11 000 28 000 11 900 29 600 12K 36K 10 000 31 000 11 100 33 200 18K 18K 17 000 17 000 18 600 18 600 18K 24K 17 000 22 000 17...

Page 59: ...00 6 400 9 600 19 100 6K 6K 9K 24K 6 000 6 000 9 000 24 000 6 200 6 200 9 300 24 600 6K 6K 9K 30K 6 000 6 000 8 000 28 000 5 900 5 900 8 800 29 200 6K 6K 9K 36K 5 000 5 000 8 000 31 000 5 500 5 500 8...

Page 60: ...000 8 200 10 900 10 900 21 700 9K 12K 12K 30K 7 000 9 000 9 000 24 000 7 400 9 800 9 800 24 500 9K 12K 18K 18K 8 000 10 000 16 000 16 000 8 200 10 900 16 300 16 300 9K 12K 18K 24K 7 000 9 000 14 000...

Page 61: ...K 9K 12K 6 000 9 000 9 000 9 000 12 000 6 000 9 000 9 000 9 000 12 000 6K 9K 9K 9K 18K 6 000 9 000 9 000 9 000 17 000 6 000 9 000 9 000 9 000 18 000 6K 9K 9K 9K 24K 5 000 8 000 8 000 8 000 22 000 5 00...

Page 62: ...000 12 800 12 800 012 018 11 000 17 000 12 100 18 200 012 024 10 000 20 000 11 100 22 200 018 018 15 000 15 000 16 600 16 600 018 024 13 000 18 000 14 500 19 300 024 024 15 000 15 000 15 700 15 700 3...

Page 63: ...00 8 000 31 000 8 200 8 200 32 700 009 012 012 9 000 12 000 12 000 9 900 13 200 13 200 009 012 018 9 000 12 000 18 000 9 300 12 400 18 600 009 012 024 8 000 11 000 22 000 8 800 11 800 23 500 009 012 0...

Page 64: ...700 17 500 009 012 012 024 8 000 10 000 10 000 21 000 8 200 10 900 10 900 21 700 009 012 012 030 7 000 9 000 9 000 24 000 7 400 9 800 9 800 24 500 009 012 018 018 8 000 10 000 16 000 16 000 8 200 10 9...

Page 65: ...R O O D N I Electronic expansion valve CAPILIARY TUBE Accumulator CAPILIARY TUBE Outdoor Coil 11 2 MPC Two Zone Refrigerant Cycle Diagram LIQUID VALVE A GAS VALVE A Indoor Coil Compressor Outdoor Coil...

Page 66: ...mulator T2B A Evaporator temp sensor outlet T2B B T2B C 11 4 MPC Four Zone Refrigerant Cycle Diagram LIQUID VALVE A GAS VALVE A Compressor Indoor Coil Outdoor Coil 4 WAY VALVE COOLING HEATING T2 Evapo...

Page 67: ...D CAPILIARY D LIQUID VALVE D GAS VALVE D EXV E CAPILIARY E LIQUID VALVE E GAS VALVE E Compressor 4 WAY VALVE T5 Discharge temp sensor Accumulator High pressure switch Low pressure switch 11 6 MLB Six...

Page 68: ...t Diameters in Maximum Elevation Outdoor Unit BELOW Indoor Unit ft m Maximum Elevation Outdoor Unit ABOVE Indoor Unit ft m Maximum Line Set Length ft m Liquid Gas 009 1 4 3 8 40 ft 12 m 40 ft 12 m 82...

Page 69: ...it Model No MLB018S4M MPC018S4M MLB030S4M MPC030S4M MLB036S4M MPC036S4M MLB048S4M MPC048S4M Maximum Number of Indoor Units Zones Two Three Four Five Indoor Unit Connections 2 1 4 liq 2 3 8 gas 3 1 4 l...

Page 70: ...5 zone not 2 zone multi zone units have a master valve on each refrigerant line The master valve controls refrigerant to all of the zone supply valves Open the master valves prior to opening the zone...

Page 71: ...nished with outdoor unit Table 8 MPC024S4M Number of Zones and Outdoor Unit Connection Sizes NOTE Letter Indoor Unit Zone Connection on Outdoor Unit Zone 1 A Zone 2 B Zone 3 C 1 4 in liq 3 8 in gas 1...

Page 72: ...4 in liq 3 8 in gas 006 012 006 018 009 009 009 012 009 018 012 012 012 018 018 018 006 006 006 006 006 009 006 006 012 006 006 018 006 009 009 006 009 012 006 009 018 006 012 012 006 012 018 009 009...

Page 73: ...018 024 009 009 009 009 009 012 009 009 018 009 009 024 009 012 012 009 012 018 009 012 024 009 018 018 012 012 012 012 012 018 012 012 024 012 018 018 006 006 006 006 006 006 006 009 006 006 006 012...

Page 74: ...6 009 009 024 006 009 012 012 006 009 012 018 006 012 012 012 006 012 012 018 009 009 009 009 009 009 009 012 009 009 009 018 009 009 012 012 009 009 012 018 009 012 012 012 012 012 012 012 LEGEND CLE...

Page 75: ...09 036 006 012 018 006 012 024 006 012 030 006 012 036 006 018 018 006 018 024 006 018 030 006 018 036 006 024 024 006 024 030 009 009 018 009 009 024 009 009 030 009 009 036 009 012 012 009 012 018 0...

Page 76: ...06 006 009 018 006 006 009 024 006 006 009 030 006 006 009 036 006 006 012 012 006 006 012 018 006 006 012 024 006 006 012 030 006 006 012 036 006 006 018 018 006 006 018 024 006 006 018 030 006 006 0...

Page 77: ...09 009 012 018 009 009 012 024 009 009 012 030 009 009 018 018 009 009 018 024 009 012 012 012 009 012 012 018 009 012 012 024 009 012 012 030 009 012 018 018 009 012 018 024 012 012 012 012 012 012 0...

Page 78: ...018 006 006 009 012 024 006 006 009 012 030 006 006 009 018 018 006 006 009 018 024 006 006 012 012 012 006 006 012 012 018 006 006 012 012 024 006 006 012 018 018 006 009 009 009 009 006 009 009 009...

Page 79: ...on to the 048 outdoor unit furnished with outdoor unit 1 2 x 5 8 in gas pipe adapter is required for line set connection to the 048 outdoor unit furnished with outdoor unit 14 MLB Multi Zone Outdoor U...

Page 80: ...in liq 3 8 in gas 1 4 in liq 3 8 in gas 009 018 009 024 009 030 012 012 012 018 012 024 012 030 018 018 018 024 018 030 024 024 009 009 009 009 009 012 009 009 018 009 009 024 009 009 030 009 012 012...

Page 81: ...024 009 012 030 009 012 036 009 018 018 009 018 024 009 018 030 009 018 036 009 024 024 009 024 030 012 012 012 012 012 018 012 012 024 012 012 030 012 012 036 012 018 018 012 018 024 012 018 030 012...

Page 82: ...09 012 018 018 009 012 018 024 012 012 012 012 012 012 012 018 012 012 012 024 012 012 018 018 009 009 009 009 009 009 009 009 009 012 009 009 009 009 018 009 009 009 009 024 009 009 009 012 012 009 0...

Page 83: ...ad electrical circuit as this may lead to failure and possible fire Use specified wiring and cable to make electrical connections Clamp cables securely and make sure that con nections are tight to avo...

Page 84: ...llow drainage to occur If the heat pump unit is installed on wall mounting brackets insert the provided drain connector into one of the 1 inch 25 mm drain holes and attached a field provided insulated...

Page 85: ...85 17 MPC Condensate Pump Diagrams Figure 33 MPC Condensate Pump Powered by MPA Wiring Diagram Figure 34 MPC Condensate Pump Powered by Separate Source Wiring Diagram...

Page 86: ...cm 9 52 3 8 2500 255kgf cm 2600 265kgf cm 12 7 1 2 3500 357kgf cm 3600 367kgf cm 18 2 Pipe Length and Elevation Maximum piping length and height difference Table 16 Pipe Diameter MM Inches Indoor Uni...

Page 87: ...2 way and 3 way valves are set to the closed position Connect the charge hose with the push pin of the Handle Lo to the 3 way valve gas service port Connect the charge hose of the Handle Hi to the vac...

Page 88: ...h pin of handle lo to the 3 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 5 seconds and then...

Page 89: ...le operating the air conditioner turn off the air conditioner before disconnecting the hose Mounted the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torq...

Page 90: ...longer NOTE Do not remove refrigerant for line lengths less than 25 ft R 410A is a blended refrigerant If you must remove charge it is necessary to remove the entire charge and weigh in the new charge...

Page 91: ...Indoor units will display more detailed error codes These outdoor units do not have a SW1 spot check push button switch Diagnostic is performed through a series of blue red and green LEDs NOTE The con...

Page 92: ...ck the states of the unit when it is operational The digital display will toggle through he states when SW1 is pressed Figure 36 Typical Location of LEDs and SW1 18K and 30K Multi Zone Outdoor Units F...

Page 93: ...C for three seconds the compressor will stop while the indoor fan and outdoor fan will continue When T3 125 6 F 52 C the protection will release and the compressor will restart after three minutes Out...

Page 94: ...117 125 147 PSI 75 124 120 126 132 155 PSI 80 135 129 132 140 162 24 1 2 Pressure PSI PSI 145 58 70 75F 23 89 85F 29 44 Outdoor temp 95F 105F 115F 35 40 56 46 11 174 24 2 Heating Chart 24 2 1 Heating...

Page 95: ...correction T1 Ts 3 1 1 e c a 4 2 0 2 3 0 1 f d b Figure 38 Cooling Mode Capacity Area a b c d e f Norm Code N 3 2 1 5 1 5 0 Model 9K 12K 18K HP 1 0 1 2 1 5 NOTE The final result is integer Plus all th...

Page 96: ...OL_ F1 COOL_ F2 COOL_ 15 COOL_ 16 Amendatory capacity demand 0 1 2 15 16 Meanwhile the maximum running frequency will be adjusted according to the outdoor ambient temp 43 41 38 T4LimFre1_ADD No limit...

Page 97: ...ording to the final capacity request to confirm the operating frequency as following table Heating capacity improved in low ambient heating In heating mode when T2 T2_ExitT4LowFre_ADD and T4 4 C there...

Page 98: ...T30 After 40 minutes of run time T3 11 2 F Figure 40 Defrost Calculations 24 5 Defrost Theory Tdef The unit must run for a minimum of 11 minutes or longer in order for it to go into defrost mode At th...

Page 99: ...9 17 26 25 When low ambient cooling is valid 27 High Low 25 20 15 low ambient cooling Outdoor fan speed control logical low ambient cooling When T4 15 C 59 F and T3 30 C 86 F the unit will enter into...

Page 100: ...Compressor and outdoor fan start operation only after EXV is initialized 24 9 1 Cooling mode The initial open angle of EXV is 250P adjustment range is 100 350p When the unit start to work for 3 minut...

Page 101: ...101...

Page 102: ...102...

Page 103: ...103...

Page 104: ...Single Zone Outdoor Units 52 Dry Mode Operation 3WMC and MWMC 26 F Fan Control Outdoor 99 L LEDs Multi Zone Outdoor Units 92 Single Zone Outdoor Unit 91 Line Sets MLB and MPC Single Zone Units 65 Mult...

Search results

Summary of Contents for MWMC

Reviews:

Related manuals for MWMC

Brands by name

Popular brands

Lennox MWMC, Service Manual

Search results

Summary of Contents for MWMC

Reviews:

Related manuals for MWMC

Brands by name

Popular brands