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Mini-Split Multi-Position Indoor Air Handler (MMA)
1. Safety Precautions ........................................................................ . 3
1.1.
Refrigerant Presence ...................................................................3
1.2.
Fire Extinguisher ..........................................................................3
1.3.
No Ignition Sources .....................................................................3
1.4.
Ventilated Workspace ..................................................................4
1.5.
Check Refrigeration Equipment ...................................................4
1.6.
Check Electrical Devices .............................................................4
1.7.
Repair Seal Components ............................................................4
1.8.
Repair to Intrinsically Safe Components .....................................4
1.9.
Check Cabling .............................................................................4
1.10.
Flammable Refrigerant Detection ................................................5
1.11.
Remove/Evacuation of Refrigerant ..............................................5
1.12.
Charging Procedures ...................................................................5
1.13.
Decommissioning .......................................................................6
1.14.
Labeling ......................................................................................6
1.15.
Recovery .....................................................................................6
Indoor Unit Information .......................................... 7
2. MMA (Mini-Split Multi-Position Air Handler) ............................. 7
2.1.
Model Number Identification ........................................................7
2.2.
Indoor Unit Specifications ............................................................7
MINI-SPLIT SYSTEMS SERVICE MANUAL
Indoor and Outdoor Unit Information
Table of Contents
2.4.
MMA Indoor Unit Dimensions ......................................................9
2.5.
MMA Indoor Unit Clearances .....................................................10
2.6.
Indoor Unit Blower Data ............................................................11
3. Noise Criterion Curves ............................................................. 15
3.1.
Requirements ...........................................................................17
3.2.
Overview ....................................................................................17
3.3.
Indoor/Outdoor Unit Match-Ups .................................................18
3.4.
Controller Compatibility .............................................................18
3.5.
Electrical Wiring Diagrams ........................................................19
3.6.
Wiring Guide ..............................................................................20
3.7.
Terminal Connections ................................................................22
vices .......................................................................................... 24
4.1.
Centralized Controller ................................................................24
4.2.
ON/OFF Devices .......................................................................24
4.3.
Alarm Devices ...........................................................................25
4.4.
Micro-Switch Introduce ..............................................................25
4.5.
Dial Codes .................................................................................26
5. Connecting Cables.................................................................... 29
1
MLB & MPC Outdoor Units
100090
5/2023
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Summary of Contents for Lennox MMA018SM4
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Page 1: Table Of Contents
MINI-SPLIT SYSTEMS SERVICE MANUAL Indoor and Outdoor Unit Information 100090 5/2023 MLB & MPC Outdoor Units Mini-Split Multi-Position Indoor Air Handler (MMA) Table of Contents 1. Safety Precautions ................ . 3 2.4. MMA Indoor Unit Dimensions ............9 2.5. MMA Indoor Unit Clearances .............10 1.1. - Page 2 Outdoor Unit Information ........30 14. Installation Requirements ............65 14.1. Torque Requirements ..............65 6. Single and Multi-Zone Outdoor Units ........30 14.2. Pipe Length and Elevation ............65 6.1. Model Number Identification ............30 15. Electronic Function..............69 6.2. Outdoor Unit Specifications ............32 15.1. Abbreviations ................69 6.3.
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Page 3: Safety Precautions
WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a qualified installer or service agency. WARNING Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch(es). -
Page 4: Ventilated Workspace
1.4. Ventilated Workspace 1.7. Repair Seal Components Ensure the work area is adequately ventilated before During repairs to sealed components, all electrical supplies breaking into the system or conducting any hot work. must be disconnected from the equipment being serviced Maintain ventilation until service is complete. -
Page 5: Flammable Refrigerant Detection
1.10. Flammable Refrigerant Detection Refrigerant Removal or Evacuation Tips • The refrigerant charge must be recovered into the CAUTION correct recovery cylinders. Do not use potential sources of ignition when • The system must be flushed with OFN to render the detecting refrigerant leaks. -
Page 6: Decommissioning
1.13. Decommissioning 1.15. Recovery Before executing this procedure, it is essential that the When removing refrigerant from a system (either for technician is completely familiar with the equipment and all servicing or decommissioning), use best practices and its components. Take an oil and refrigerant sample before caution to ensure refrigerant is removed safely. -
Page 7: Indoor Unit Information
048 = 4 tons (single zone) 060 = 5 tons (single zone) 2.2. Indoor Unit Specifications SI NGL E ZON E & MULTI- ZONE 1. 5 - 5 TO N Model No. MMA018SM4 MMA024SM4 MMA036S4 MMA048S4 MMA060S4 Nominal Tons Power Supply - 60 Hz - 1 phase... - Page 8 EL ECT RI C HE AT DATA Electric Heat Minimum Circuit Maximum Overcurrent Indoor Input Ampacity (MCA) Protection (MOCP) Model Size and Usage Volt Btuh Ckt 1 Ckt 2 Ckt 1 Ckt 2 Model Number 018, 5 kW 24Z26 12,800 024, 14,300 23 / 27...
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Page 9: Mma Indoor Unit Dimensions
2.4. MMA Indoor Unit Dimensions 1 (25) 1 (25) 1 (25) 10-1/4 SUPPLY AIR (200) OPENING LOW VOLTAGE INLETS LINE VOLTAGE INLETS (Top and Left Sides) (Top and Right Sides) TOP VIEW 21 (533) 5/16 2-7/8 (73) SUCTION LINE CIRCUIT 2-3/16 BREAKER LINE VOLTAGE INLETS... -
Page 10: Mma Indoor Unit Clearances
2.5. MMA Indoor Unit Clearances Vertical Installation (Ducted) When installed vertically (upward or downward), the lower Non-Ducted Return Closet Installation end of the air outlet must be connected to the L-shaped met- al air duct and fastened by screws. The air handler can be installed in a closet with a false bot- tom to form a return air plenum. -
Page 11: Indoor Unit Blower Data
2.6. Indoor Unit Blower Data 2.6.1. MMA018 0.148 External sta c pressure (in.w.c.) Figure 4. MMA018 - Blower Data 2.6.2. MMA024 0.1 0.148 0.2 External sta c pressure (in.w.c. Figure 5. MMA024 - Blower Data... - Page 12 2.6.3. MMA036 1200 1000 0.148 External sta c pressure (in.w.c.) Figure 6. MMA036 - Blower Data...
- Page 13 2.6.4. MMA048 1600 1400 1200 1000 0.148 External sta c pressure (in.w.c.)
- Page 14 2.6.5. MMA060 1800 1600 1400 1200 1000 0.148 External sta c pressure (in.w.c.) Figure 7. MMA060 - Blower Data...
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Page 15: Noise Criterion Curves
3. Noise Criterion Curves 3.28ft (1m) 6.56ft (2m) 4.92ft (1.5m) Air Handler Figure 8. Noise Measurement - Concealed Duct Sound is measured 4.92 ft (1.5m) away from the center of the air handler. Data is valid and gathered in free field and nominal operation conditions. - Page 16 MMA036 MMA048 MMA060...
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Page 17: Indoor And Outdoor Power And Communication Wiring Requirements
3.1. Indoor and Outdoor Power and Communication Wiring Requirements CAUTION This unit must be properly grounded and protected by a circuit breaker. The ground wire for the unit must not be connected to a gas or water pipe, a lightning conductor or a telephone ground wire. Do not connect power wires to the outdoor unit until all other wiring and piping connections have been completed. -
Page 18: Indoor/Outdoor Unit Match-Ups
When two air handler units are connected by a multi-zone outdoor unit, the above rules apply. The second air handler unit is regarded as other IDU Zones. 3.4. Controller Compatibility Indoor Unit Controller MMA018SM4-1P MMA024SM4-1P M0STAT120N-1 (Mini-Split Wired Programmable Controller) MMA036S4-1P 24-Volt Thermostat (optional) -
Page 19: Electrical Wiring Diagrams
3.5. Electrical Wiring Diagrams Abbreviation Meaning Yellow - Green Conductor Indoor Fan Capacitor Indoor Fan Motor Indoor Electronically Commutated Motor Indoor Room Temperature Sensor Indoor Coil Inlet Temperature Sensor Indoor Coil Outlet Temperature Sensor Indoor Coil Temperature Sensor 18-24K Wiring Diagram WIRING DIAGRAM 24V THERMOSTATS SETTING 24V THERMOSTATS SETTING... -
Page 20: Wiring Guide
36-60K Wiring Diagram WIRING DIAGRAM 24V THERMOSTATS SETTING 24V THERMOSTATS SETTING NOTE1: 1.The parts with dotted line indicates CODE PART NAME optional features. INDOOR ECM MOTOR S4 S4 2.Remove the short connector of JR1 ROOM TEMP.SENSOR when you use the "on-off" function. 1 1 2 2 3 3 1 1 2 2 3 3 1 1 2 2 3 3... - Page 21 Table 1. Single Zone Mini-Split Wiring Guide System Number of Systems System Voltage Wire Type Wire Gauge Capacity Conductors Indoor to Outdoor Wiring (Communication only) 208/230 VAC Stranded (shielded) 24AWG*3 (S1, S2 and GND) Outdoor to Main Power MCA: 35A 208/230 VAC Stranded L1, L2 and GND...
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Page 22: Terminal Connections
3.7. Terminal Connections 208/230V Indoor Unit 208/230V Outdoor Unit Terminal Block Terminal Block L1 L2 From Power Suppl y Outdoor Unit Indoor Unit Figure 9. Single-Zone Wiring 24K and Below 208/230V Indoor Unit B 208/230V Indoor Unit A 208/230V Outdoor Unit Terminal Block Terminal Block Terminal Block... - Page 23 208/230V Outdoor Unit Terminal Block 208/230V Indoor Unit 208/230V Indoor Unit 1(A) 2(A) 3(A) 1(B) 2(B) 3(B) 1(C) 2(C) 3(C) 1(D) 2(D) 3(D) 1(E) 2(E) 3(E) Terminal Block Terminal Block From Power Suppl y Indoor Unit E To Indoor Unit A To Indoor Unit B Indoor Unit D To Indoor Unit C...
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Page 24: Connection To Centralized Controller, On/Off And Alarm Devices
4. Connection to Centralized Controller, ON/OFF and Alarm Devices 4.1. 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. -
Page 25: Alarm Devices
4.3. Alarm Devices Mini-Split indoor units can be connected to an alarm device such as a light or buzzer using two dry contacts on the indoor unit main board. Figure 16. Alarm Device Connection Points (Typical) 4.4. Micro-Switch Introduce Alarm Terminal Port (CN33) Connect the power;... -
Page 26: Dial Codes
Remote Control Terminal (ON-OFF, CN2, Short Connector JR1) NOTE: Remove the short connector (JR1) when using the ON-OFF function. Remote Switch Unit Status Demand Response Time ON (close) Unit is on. Within two (2) seconds OFF (open) Unit is off. Within two (2) seconds 1. - Page 27 Dial Code Control Function Note Scenario SW2-4 Compressor/Auxiliary heat outdoor ambient The compressor [Default] The SW2-4 and S3 lockout will not operate heater will need to working if the outdoor not operate if together temperature is the outdoor lower than the temperature is temperature greater than...
- Page 28 DIP Switch S1 and S2 Address dialing S1+S2: Address dialing is required when using the centralized controller. Determined by Dial Code Network address: S2 1-10K 2-5.1K • The address silkscreen is NET address, which is composed of a 16- Dial code selection Website address bit address rotary code S2 plus a two-digit DIP switch S1 (Set during engineering installation, no network function needs to be set)
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Page 29: Connecting Cables
24V Input Terminal Mode Priority Y/Y2 E/AUX DH/DS/BK Display speed Emergency heat Turbo Heating zone control Heating zone control Heating zone control Heating zone control Heating zone control Heating zone control NOTE: 1: 24V signal 0: No 24V signal *: 1 or 0. The air handler unit will turn off if the 24V input cannot meet the table. -
Page 30: Outdoor Unit Information
Outdoor Unit Information 6. Single and Multi-Zone Outdoor Units NOTE: Outdoor units can only be installed in an unenclosed outdoor environment. WARNING CAUTION The clean Air Act of 1990 bans the intentional venting of As with any mechanical equipment, contact with sharp refrigerant (CFCs, HCFCs, and HFCs) as of July, 1992. - Page 31 OUTDOOR MULTI-ZONE HEAT PUMP UNITS - MPC M P C 036 S 4 M - 1 P Series Type Voltage M = Mini-Split P = 208/230V-1 phase-60hz Unit Type Minor Design Sequence L = Low Ambient Heat Pump 1 = 1st Revision P = Heat Pump Major Design Sequence Refrigerant Circuits...
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Page 32: Outdoor Unit Specifications
6.2. Outdoor Unit Specifications M L B SPECI FICAT IO NS S I N GL E ZO N E | 1 . 5 - 4 TO N Outdoor Unit Model No. MLB018S4S MLB024S4S MLB036S4S MLB048S4S Nominal Size - Tons Ambient Temperature Operating Cooling –22 - 122 –22 - 122... - Page 33 M L B SPECI FICAT IO NS M ULT I -ZON E | 2. 5 & 3 TO N Nominal Size - Tons Outdoor Unit Model No. MLB030S4M MLB036S4M Number of Zones Up to 3 Up to 4 Ambient Temperature Range - °F Cooling –22 - 122 –22 - 122...
- Page 34 M L B SPECI FICAT IO NS M ULTI - ZO NE | 4 TO N Nominal Size - Tons Outdoor Unit Model No. MLB048S4M Number of Zones Up to 5 Ambient Temperature Range - °F Cooling –22 - 122 Heating –22 - 86 Sound Data (dBA)
- Page 35 M P C S PECI FICAT IO NS S I N GL E ZO NE | 1. 5 - 4 TO N Nominal Size - Tons Outdoor Unit Model No. MPC018S4S MPC024S4S MPC036S4S MPC048S4S Ambient Temperature Cooling –13 - 122 –13 - 122 –13 - 122 –13 - 122...
- Page 36 M P C S PECI FICAT IO NS S I N G L E ZO NE | 5 TO N Nominal Size - Tons Outdoor Unit Model No. MPC060S4S Ambient Temperature Cooling 60 - 90 Operating Range - °F Heating 32 - 86 Sound Data Cooling/Heating...
- Page 37 M P C S PECI FICAT IO NS M ULTI - ZO N E | 2 TO N Nominal Size - Tons Outdoor Unit Model No. MPC024S4M MPC030S4M Number of Zones Up to 4 Up to 5 Ambient Temperature Range - °F Cooling –13 - 122 –13 - 122...
- Page 38 M P C S PECI FICAT IO NS M ULTI - ZO N E | 3 & 4 TO N Nominal Size - Tons Outdoor Unit Model No. MPC036S4M MPC048S4M Number of Zones Up to 4 Up to 5 Ambient Temperature Range - °F Cooling –13 - 122 –13 - 122...
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Page 39: Single-Zone Outdoor Unit Dimensions
6.3. Single-Zone Outdoor Unit Dimensions TYPICAL APPEARANCE OF UNITS Figure 17. Single Zone Outdoor Unit Dimensions - Inches (mm) Unit of Model Measurement inches 37-5/8 26-1/8 26-1/2 12-3/4 MPC018S4S-*P inches 37-1/4 26-1/2 37-7/8 15-7/8 MPC024S4S-*P MPC036S4S-*P inches 41-1/8 27-7/8 55-1/2 16-3/8 15-7/8 MPC048S4S-*P... -
Page 40: Multi-Zone Outdoor Unit Dimensions
6.4. Multi-Zone Outdoor Unit Dimensions Unit of TYPICAL APPEARANCE OF UNITS Model Measurement MPC024S4M-*P inches 40-3/4 26-1/2 31-7/8 16-1/8 15-7/8 MPC030S4M-*P 1035 MPC036S4M-*P inches 41-3/4 55-1/2 16-3/8 17-5/8 MPC048S4M-*P 1060 1333 inches 40-5/8 26-1/2 31-7/8 15-1/8 15-7/8 MLB030S4M-*P 1035 inches 41-3/4 55-1/2 16-3/8... -
Page 41: Outdoor Unit Clearances - Single Units
6.5. Outdoor Unit Clearances - Single Units 24 (610) Air Inlet (305) (305) (610) (2007) Air Outlet Minimum rear clearance can be 6 inches (152 mm) when mounted on brackets and with no obstructions on the other three sides. 24 (610) Air Inlet (305) (305) -
Page 42: Outdoor Unit Clearances - Multiple Units
6.6. Outdoor Unit Clearances - Multiple Units Height of Wall (C) Unit Height (A) CLEARANCE NOTES FOR MULTIPLE 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). -
Page 43: Mlb And Mpc Multi-Zone System Combinations
7. MLB and MPC Multi-Zone System Combinations Table 5. MLB and MPC Multi-Zone System Combinations NOTE - For multi-zone systems, the total capacity of all indoor units must be 66% to 133% of the outdoor unit capacity. Number Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Outdoor Unit... - Page 44 Table 5. MLB and MPC Multi-Zone System Combinations NOTE - For multi-zone systems, the total capacity of all indoor units must be 66% to 133% of the outdoor unit capacity. Number Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Outdoor Unit Capacity System Capacity (Btuh)
- Page 45 Table 5. MLB and MPC Multi-Zone System Combinations NOTE - For multi-zone systems, the total capacity of all indoor units must be 66% to 133% of the outdoor unit capacity. Number Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Outdoor Unit Capacity System Capacity (Btuh)
- Page 46 Table 5. MLB and MPC Multi-Zone System Combinations NOTE - For multi-zone systems, the total capacity of all indoor units must be 66% to 133% of the outdoor unit capacity. Number Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Outdoor Unit Capacity System Capacity (Btuh)
- Page 47 Table 5. MLB and MPC Multi-Zone System Combinations NOTE - For multi-zone systems, the total capacity of all indoor units must be 66% to 133% of the outdoor unit capacity. Number Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Outdoor Unit Capacity System Capacity (Btuh)
- Page 48 Table 5. MLB and MPC Multi-Zone System Combinations NOTE - For multi-zone systems, the total capacity of all indoor units must be 66% to 133% of the outdoor unit capacity. Number Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Outdoor Unit Capacity System Capacity (Btuh)
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Page 49: Refrigeration Pipe Work
8. Refrigeration Pipe Work 8.1. MPC Single-Zone Refrigerant Cycle Diagram Electronic CAPILIARY TUBE CAPILIARY TUBE expansion valve LIQUID SIDE 2-WAY VALVE T3 Condenser temp. sensor Indoor Coil Outdoor Coil T4 Ambient T1 Room temp. temp. sensor sensor T2 Evaporator temp. sensor GAS SIDE 4-WAY VALVE 3-WAY VALVE... -
Page 50: Mpc Three-Zone Refrigerant Cycle Diagram
8.3. MPC Three-Zone Refrigerant Cycle Diagram INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A EXV B CAPILIARY B CHECK VALVE LIQUID VALVE B EXV C CAPILIARY C LIQUID VALVE C Condenser temp. sensor CAPILIARY TUBE T4 Ambient T1 Room Indoor Coil Outdoor Coil temp. -
Page 51: Mpc Five-Zone Refrigerant Cycle Diagram
8.5. MPC Five-Zone Refrigerant Cycle Diagram INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A EXV B CAPILIARY B LIQUID VALVE B EXV C CAPILIARY C CHECK VALVE LIQUID VALVE C EXV D CAPILIARY D LIQUID VALVE D Condenser temp. sensor CAPILIARY TUBE EXV E CAPILIARY E LIQUID VALVE E... -
Page 52: Single-Zone Piping Limitations
8.6. Single-Zone Piping Limitations Minimum Line Set Length - 10 ft. (3m) Maximum Line Set OUTDOOR UNIT INDOOR UNIT Length Maximum Line Set Length Maximum Maximum Elevation - Elevation - INDOOR UNIT Outdooor Outdooor Unit BELOW Unit ABOVE Indoor Unit Indoor Unit OUTDOOR UNIT Minimum Line Set... - Page 53 INDOOR UNIT INDOOR UNIT INDOOR UNIT Maximum Elevation - 49 ft. Outdoor Unit (15 m) BELOW Indoor Units NOTE - Minimum Line Set Length - 10 ft. (3 m) per Indoor Unit NOTE - Maximum Line Set NOTE - Maximum Difference Length Includes ALL in Elevation Between Indoor Units - 33 ft.
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Page 54: Master Valves (3 To 5 Zone Outdoor Units)
9. Master Valves (3 to 5 Zone Outdoor Units) • 3-zone, 4-zone and 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- supply valves. - Page 55 LEGEND: CLEAR = No adaptors required. GRAY = 3/8 x 1/2 in. gas pipe adaptor is required for line set connection to outdoor unit (furnished with outdoor unit). MLB030S4M and MPC030S4M 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)
- Page 56 MLB036S4M / MPC036S4M 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) Zone 4 (D) 1/4 in. liq + 1/2 in. gas 1/4 in.
- Page 57 MLB036S4M / MPC036S4M 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) Zone 4 (D) 1/4 in. liq + 1/2 in. gas 1/4 in.
- Page 58 MLB048S4M / MPC048S4M 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) Zone 4 (D) Zone 5 (E) 1/4 in. liq + 1/2 in. gas 1/4 in.
- Page 59 MLB048S4M / MPC048S4M 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) Zone 4 (D) Zone 5 (E) 1/4 in. liq + 1/2 in. gas 1/4 in.
- Page 60 MLB048S4M / MPC048S4M 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) Zone 4 (D) Zone 5 (E) 1/4 in. liq + 1/2 in. gas 1/4 in.
- Page 61 MLB048S4M / MPC048S4M 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) Zone 4 (D) Zone 5 (E) 1/4 in. liq + 1/2 in. gas 1/4 in.
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Page 62: Power And Communication Wiring For Systems
11. Power and Communication Wiring for Systems CAUTION This unit must be properly grounded and protected by a circuit breaker. The ground wire for the unit must not be connected to a gas or water pipe, a lightning conductor or a telephone ground wire. Do not connect power wires to the outdoor unit until all other wiring and piping connections have been com- pleted. -
Page 63: Outdoor Unit Condensate Piping
12. Outdoor Unit Condensate Piping Condensate formed during the heating and defrost processes must be drained from heat pump units. Drain holes are provided in the base of the units to ensure proper drainage. Heat pumps must be raised when installed on a concrete pad or the ground to allow drainage to occur. -
Page 64: Mpc Condensate Pump Diagrams
13. MPC Condensate Pump Diagrams Figure 22. MPC Condensate Pump Powered by MPA Wiring Diagram Figure 23. MPC Condensate Pump Powered by Separate Source Wiring Diagram... -
Page 65: Installation Requirements
14. Installation Requirements 14.1. Torque Requirements CAUTION Refrigerant pipe diameter is different according to indoor unit to be connected. When using the extension pipe, refer to the tables below. When refrigerant pipe diameter is different from that of the outdoor unit connector (18K indoor unit) an additional adapter is required. - Page 66 14.2.1. Additional Refrigerant Charge Table 9. Additional Refrigerant Charge Outdoor Unit Pipe Length Amount of Refrigerant to add Size (KBtu) (feet / meters) >25 (7.5) 0.16 oz/ft (15g/m) >25 (7.5) 0.32 oz/ft (30g/m) >25 (7.5) 0.32 oz/ft (30g/m) >25 (7.5) 0.32 oz/ft (30g/m) >25 (7.5) 0.32 oz/ft (30g/m)
- Page 67 14.2.5. Adding Refrigerant if Pipe Length Exceeds Charge Less Pipe Length Connect the charge hose to the charging cylinder and open the liquid side and suction side valves. With the charge hose you disconnected from the vacuum pump, connect it to the valve at the bottom of the cylinder. If the refrigerant is R410A, place the cylinder bottom-up to ensure liquid charging is possible.
- Page 68 • Set the suction side 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 liquid side and suction side valve’s stem nuts. •...
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Page 69: Electronic Function
14.2.8. Evacuation after Servicing the Outdoor Unit Refrigeration Circuit 14.2.8.1 Evacuation of the Complete Refrigeration Circuit, Indoor and Outdoor Unit • Confirm that both the liquid side and suction side valves are set to the opened position. • Connect the vacuum pump to suction side valve’s service port. •... -
Page 70: Electric Control Working Environment
15.2. Electric Control Working Environment. • Input voltage: 230V. • Input power frequency: 60Hz. • Indoor fan standard working amp.: <1A • Outdoor fan standard working amp.: <1.5A. • Four-way valve standard amp.: <1A 16. Start-Up 16.1. Adding Refrigerant - Single-Zone Systems The outdoor unit is factory-charged with refrigerant. -
Page 71: Single And Multi-Zone Outdoor Control Connections
17. Single and Multi-Zone Outdoor Control Connections Inverter Outdoor PCB PCB Code: 17122300001076 24K Mono Main PCB CN21 CN18 Port Descrip on Voltage Power output for 4-way valve 230V/AC Power output for compressor 230V/AC heater Digital CN26 6 Display Port for L-in 230V/AC Check Power output for chassis heater... - Page 72 Inverter r Outdoor r PCB PCB Code: 17122000048064 18K/24K (Gas cooler) Alt. CN23 CN17 CN19 CN16 CN414 C C 4 N N 14 CN18 C C 1 CN60 Port Descrip on Voltage CN23 Port for test board 5V/DC CN414 Port for DC fan 0-310V/AC Power output for condenser (T3), CN17...
- Page 73 Figure 26. Typical Component Locations (MLB048S4S-2P, MLB036S4S-2P, MLB048S4S-1P, MLB036S4S-1P, MLB048S4M-2P. MPC048S4S-1P and MPC060S4S-1P)
- Page 74 Inverter Outdoor PCB Code: 17122000041117 18K/24K (Gas cooler) CN23 CN17 CN19 CN16 CN414 C C 4 N N 14 CN18 C C 1 CN60 Port Descrip on Voltage CN23 Port for test board 5V/DC CN414 Port for DC fan 0-310V/AC Power output for condenser (T3), CN17 ambient (T4) and discharge (Tp)
- Page 75 PCB Code: 17122000047742 24K/36K (1 Phase, New Gas -cooler) Main PCB CN30 CN42 C C 4 CN16 CN24 CN27 C C 2 N N 7 CN28 C C C N N N 8 CN26 EEPROM Main Chip Port Descrip on Voltage CN24 Port for test board...
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Page 76: Specifications And Operations
18. Specifications and Operations Table 2. Electronic Functions Abbreviations Indoor ambient temperature Coil temperature of indoor heat exchanger Coil temperature of indoor heat exchanger outlet. (Located in outdoor unit) Pipe temperature of outdoor heat exchanger Outdoor ambient temperature Compressor discharge temperature Table 3. -
Page 77: Pressure On Service Port
19. Pressure on Service Port 19.1. Cooling Charts 19.1.1. Cooling Mode Table 8. Cooling Charge - Cooling Mode Outdoor temp. ℉ Indoor Temp. （ （ （ （ （ 23.89） 29.44） 35） 40.56） 46.11） ℃) 19.1.2. Pressure (PSI) .PSI Outdoor temp. 105F 115F 75F （23.89）85F （29.44... -
Page 78: Capacity Request Calculations
19.2.2. Pressure (PSI) Outdoor 57F (13.89) 47F (8.33) 37F (2.78) (-2.78) (-8.33) 19.3. Capacity Request Calculations Total capacity Request=Σ(Norm code × HP) /10× modify rate+ correction. T1 Ts Figure 30. Cooling Mode Capacity Area Norm Code (N) Model NOTE: The final result is integer. Plus all the indoor capacity request together, then modify it by T4. -
Page 79: Heating Mode
When there is more than one indoor unit: Outdoor Temperature (T4) >25°C 17°C - 25°C <17°C Cooling >77°F 62.6°F - 77°F <62.6°F Modify Rate 100% NOTE: The final result is integer. In low ambient cooling mode, modify rate is fixed as 40%. According to the final capacity request to confirm he operating frequency, as following table. - Page 80 Model Outdoor Temperature (T4) <0°C <12°C 12°C to 17°C ≥17°C Heating <32°F <53.6°F 53.6°F to 77°F ≥62.6°F Modify Rate 120% When there more than one indoor unit: Outdoor Temperature (T4) <0°C <12°C 12°C to 17°C ≥17°C Heating <32°F <53.6°F 53.6°F to 62.6°F ≥62.6°F Modify Rate 120%...
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Page 81: Defrost Control
19.5. Defrost Control For defrost calculations: • T3 = Outdoor coil temperature sensor. • T30 = Minimum value of T3 during 10 to 15 minutes of run-time period. Defrost mode begins when any one of the following conditions are met: •... -
Page 82: Outdoor Fan Control
19.8. Outdoor Fan Control 19.8.1. Cooling Mode Normally the system will choose the running fan speed according to ambient temperature: DC_FAN_HI_SPD_ADD 28℃ 26℃ DC_FAN_MID_SPD_ADD 25℃ 23℃ DC_FAN_MIN_SPD_ADD 22℃ 20℃ DC_FAN_SLOW_SPD_ADD 19℃ 17℃ DC_FAN_SSLOW_SPD_ADD When low ambient cooling is valid: High low ambient cooling Outdoor fan speed control logical (low ambient cooling). -
Page 83: Four-Way Valve Control
19.8.2. Heating Mode Normally the system will choose the running fan speed according to ambient temperature: DC_FAN_SSLOW_SPD_ADD 21℃ 19℃ DC_FAN_SLOW_SPD_ADD 18℃ 16℃ DC_FAN_MIN_SPD_ADD 15℃ 13℃ DC_FAN_MID_SPD_ADD 12℃ 10℃ DC_FAN_HI_SPD_ADD 19.9. Four-Way Valve Control In heating mode, four-way valve is opened. In defrosting, four-way valve operates according to defrosting action. In other modes, four-way valve is closed. -
Page 84: Error Codes
20. Error Codes The error code display is located on the main controller board of all multi-zone outdoor units. Table 10. MLB and MPC Multi-Zone Outdoor Unit Table 10. MLB and MPC Multi-Zone Outdoor Unit Error Codes Error Codes Display Malfunction and Protection Indication Display Malfunction and Protection Indication... - Page 88 Index Match-Ups MLB Multi-Zone Combinations 43 Model Number M22A and M33C Indoor Units 7 Single and Multiple Zone Outdoor Units 30 Adding Refrigerant Multi-Zone System 70 ON/OFF Device 24 Single Zone System 70 Alarm Device 25 Recovering Refrigerant 6 Blower Data - MMDB Indoor Units 11 Recovery Equipment 6 Refrigerant Charging Procedures 5 Remove/Evacuate Refrigerant 5...