Lennox MMA048S4 User Manual

2
Outdoor Unit Information ......................................30
6. Single and Multi-Zone Outdoor Units ......................................30
6.1. ModelNumberIdentication ......................................................30
6.2. OutdoorUnitSpecications .......................................................32
6.3. Single-Zone Outdoor Unit Dimensions ......................................39
6.4. Multi-Zone Outdoor Unit Dimensions ........................................40
6.5. Outdoor Unit Clearances - Single Units .....................................41
6.6. Outdoor Unit Clearances - Multiple Units ..................................42
7. MLB and MPC Multi-Zone System Combinations .................. 43
8. Refrigeration Pipe Work ...........................................................49
8.1. MPC Single-Zone Refrigerant Cycle Diagram ...........................49
8.2. MPC Two-Zone Refrigerant Cycle Diagram ..............................49
8.3. MPC Three-Zone Refrigerant Cycle Diagram............................50
8.4. MPC Four-Zone Refrigerant Cycle Diagram .............................50
8.5. MPC Five-Zone Refrigerant Cycle Diagram ..............................51
8.6. Single-Zone Piping Limitations ..................................................52
8.7. Multi-Zone Piping Limitations ....................................................52
9. Master Valves (3 to 5 Zone Outdoor Units) .............................54
10. MLB and MPC Multi-Zone Outdoor Unit Connections and Line
Set Usage ...................................................................................54
11. Power and Communication Wiring for Systems ................... 62
12. Outdoor Unit Condensate Piping ............................................63
13. MPC Condensate Pump Diagrams ..........................................64
14. Installation Requirements ........................................................ 65
14.1. Torque Requirements ................................................................65
14.2. Pipe Length and Elevation .........................................................65
15. Electronic Function...................................................................69
15.1. Abbreviations .............................................................................69
15.2. Electric Control Working Environment. ......................................70
16. Start-Up ......................................................................................70
16.1. Adding Refrigerant - Single-Zone Systems ...............................70
16.2. Adding Refrigerant - Multi-Zone Systems ..................................70
17. Single and Multi-Zone Outdoor Control Connections ........... 71
18. SpecicationsandOperations ................................................76
19. Pressure on Service Port .........................................................77
19.1. Cooling Charts ...........................................................................77
19.2. Heating Chart ............................................................................77
19.3. Capacity Request Calculations ..................................................78
19.4. Heating Mode ............................................................................79
19.5. Defrost Control ..........................................................................81
19.6. Defrost Theory ...........................................................................81
19.7. Defrost Termination....................................................................81
19.8. Outdoor Fan Control ..................................................................82
19.9. Four-Way Valve Control .............................................................83
19.10. Electronic Expansion Valve (EXV) Control ................................83
20. Error Codes ..............................................................................84

Lennox MMA048S4 Specifications

General

Brand	Lennox
Model	MMA048S4
Category	Air Conditioner
Language	English