Lennox MCFA Service Manual
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Lennox MCFA Service Manual

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MCFA and MCFB
MMDB
Indoor Unit Information ................................... 3
1.1.
Model Number Identification ........................................................3
1.2.
M22A Indoor Unit Specifications ..................................................3
1.3.
M33C Indoor Unit Specifications .................................................4
1.4.
M22A Indoor Unit Dimensions .....................................................5
1.5.
M33C Indoor Unit Dimensions .....................................................6
1.6.
M22A and M33C Indoor Unit Clearances ....................................7
1.7.
Location .......................................................................................8
1.8.
2. MMDB Ducted Indoor Units ...................................................... 10
2.1.
MMDB Model Number Identification ..........................................10
2.2.
MMDB Indoor Unit Specifications ..............................................11
2.3.
Indoor Unit Blower Data ............................................................12
2.4.
MMDB Indoor Unit Dimensions .................................................18
2.5.
MMDB Indoor Unit Clearances ..................................................19
2.6.
2.7.
MMDB Condensate Drain Test Procedure.................................20
2.8.
MMDB Indoor Unit Gravity Drain ...............................................21
3.1.
Model Number Identification ......................................................22
3.2.
3.3.
MINI-SPLIT SYSTEMS SERVICE MANUAL
Please refer to service manual 100030 for indoor and
outdoor unit error codes and component diagnostics.
MFMA
MWMC and 3WMC036

Table of Contents

Indoor and Outdoor Unit Information
MPC, 3PC, and MLB
Single Zone
M22A and M33C
3.4.
Indoor Unit Specifications (3WMC) ...........................................23
3.5.
Indoor Unit Dimensions (MWMC and 3WMC) ...........................24
3.6.
3.7.
Location .....................................................................................25
3.8.
Dry Mode Operation - MWMC and 3WMC ................................26
3.9.
Test Run - MWMC and 3WMC ..................................................26
3.10. Double-Check Pipe Connections ...............................................26
3.11. Ambient Temperature is Below 63°F (17°C) .............................27
4.1.
Model Number Identification ......................................................28
4.2.
4.3.
Indoor Unit Dimensions .............................................................29
4.4.
Indoor Unit Clearances ..............................................................30
4.5.
Location .....................................................................................31
5. MFMA Floor Indoor Unit ........................................................... 32
5.1.
Model Number Identification ......................................................32
5.2.
Indoor Unit Specifications (012 Ton) Unit ..................................32
5.3.
Indoor Unit Dimensions .............................................................33
5.4.
Indoor Unit Clearances ..............................................................33
Wiring Requirements ............................................................... 34
6.1.
Overview ....................................................................................34
6.2.
Wiring Guide ..............................................................................35
1
100029
5/2022
MLB and MPC
Multi-Zone

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  • Page 1: Table Of Contents

    1.5. M33C Indoor Unit Dimensions .............6 3.10. Double-Check Pipe Connections ..........26 1.6. M22A and M33C Indoor Unit Clearances ........7 3.11. Ambient Temperature is Below 63°F (17°C) ......27 1.7. M22A and M33C Indoor Unit Control Board Switches 4. MCFA and MCFB Ceiling / Floor Indoor Units ......28 Location ..................8 4.1. Model Number Identification ............28 1.8. M22A and M33C Condensate Drain Test Procedure ....9 4.2. Indoor Unit Specifications (018 - 048 Ton) Units .......28 2. MMDB Ducted Indoor Units ............10 4.3.
  • Page 2 20. Start-Up ..................89 6.3. Terminal Connections ..............37 7. Wired and Wireless Remotes ........... 39 20.1. Adding Refrigerant - Single-Zone Systems .......89 7.1. 22U49 Wireless Remote ............39 20.2. Adding Refrigerant - Multi-Zone Systems ........90 21. Single-Zone Outdoor Unit LED Locations ......91 7.2. 22U50 Wireless Remote ............39 7.3. 22U52 Wireless Remote ............39 22. Multi-Zone Outdoor Unit LEDs and SW1 Locations ....92 7.4.

  • Page 3: Indoor Unit Information

    Indoor Unit Information 1. M22A and M33C Cassette Non-Ducted Indoor Units 1.1. Model Number Identification CASSETTE NON-DUCTED INDOOR UNITS M 22 A 012 S 4 - 1 P Series Type Voltage M = Mini-Split P = 208/230V-1 phase-60hz Unit Type 22 = 2x2 Cassette Non-Ducted Unit Minor Design Sequence 33 = 3x3 Cassette Non-Ducted Unit...

  • Page 4: M33C Indoor Unit Specifications

    1.3. M33C Indoor Unit Specifications Model No. M33C024S4 M33C036S4 M33C048S4 Nominal Tons Power Supply - 60 hz - 1 phase 208/230V 208/230V 208/230V Rated load amps Output (W) Room Temperature Cooling 60 - 90 60 - 90 60 - 90 Range (°F) Heating 32 - 86...

  • Page 5: M22A Indoor Unit Dimensions

    1.4. M22A Indoor Unit Dimensions DRAIN CONNECTION PIPE LIQUID PIPE SIDE VIEW 10-3/8 (264) 22-1/2 20-5/8 (572) (524) Fresh Air Intake (NOTE - Not Used) LEFT SIDE VIEW RIGHT SIDE VIEW 21-1/2 (546) 22-1/2 (572) BOTTOM VIEW (Body) INSTALLATION HANGERS LEVELING ADJUSTMENT NUT (4)

  • Page 6: M33C Indoor Unit Dimensions

    1.5. M33C Indoor Unit Dimensions CONDENSATE PUMP LIQUID CONNECTION PIPE ELECTRICAL INLET HANGING BRACKETS (4) 30-3/8 (772) PIPE CONTROL BOX 26-3/8 26-3/8 (670) (670) 32-5/8 (829) Fresh Air Intake (NOTE - Not Used) 32-5/8 (829) LEFT SIDE VIEW RIGHT SIDE VIEW BOTTOM VIEW (Body) DRAIN 3-7/8...

  • Page 7: M22A And M33C Indoor Unit Clearances

    1.6. M22A and M33C Indoor Unit Clearances INSTALLATION HANGERS LEVELING ADJUSTMENT NUT (4) CEILING OUTLET OUTLET DIFFUSER INLET PANEL 23-5/8 (600) (Ceiling Opening) 36” (914 mm) 36” 36” (914 mm) (914 mm) 36” (914 mm) Minimum Clearance from Structural Ceiling to Drop Ceiling: M22A009, M22A012, M22A018 and M33C024 -- 10-1/4”...

  • Page 8: M22A And M33C Indoor Unit Control Board Switches Location

    1.7. M22A and M33C Indoor Unit Control Board Switches Location S1+S2 CCM Address (VRF only) Heating Temperature Compensation Adjustment For Mode Conflict Setting (24k and smaller units only) Indoor Fan Pre-Heat Function Speed Adjustment Adjustment (future version) Auto Restart Function Figure 1.

  • Page 9: M22A And M33C Condensate Drain Test Procedure

    1.8. M22A and M33C Condensate Drain Test Procedure 7-7/8in. 2~3-15/16 in. 3 ft. (1 m) CAUTION Make sure that drain piping is properly routed and insu- Cassette lated in order to prevent both leaks and condensation. SUPPORT Unit STRAPS IMPORTANT Drain (slope of at least ¼...

  • Page 10: Mmdb Ducted Indoor Units

    2. MMDB Ducted Indoor Units NOTE: It is recommended that Medium Static Ducted Indoor Units not be installed in unconditioned spaces with temperatures above 100°F. 2.1. MMDB Model Number Identification M MD B 012 S 4 - 1 P Series Type Voltage M = Mini-Split P = 208/230V-1 phase-60hz...

  • Page 11: Mmdb Indoor Unit Specifications

    2.2. MMDB Indoor Unit Specifications Model No. MMDB009S4 MMDB012S4 MMDB018S4 Nominal Tons 0.75 Power Supply - 60 hz - 1 phase 208/230V 208/230V 208/230V Rated load amps 1.11 1.11 Output (W) Room Temperature Cooling 62 - 90 62 - 90 62 - 90 Range (°F) Heating...

  • Page 12: Indoor Unit Blower Data

    2.3. Indoor Unit Blower Data 2.3.1. MMDB009S4 *SP1 Limit *SP2 Limit 0.04 0.08 0.10 0.12 0.16 0.20 0.04 0.08 0.10 0.12 0.16 0.20 External Static Pressure - in. w.g. External Static Pressure - in. w.g. *SP1 Limit airflow rate setting on the controller. *SP2 Limit airflow rate setting on the controller.
  • Page 13 2.3.2. MMDB012S4 *SP1 Limit *SP2 Limit 0.04 0.08 0.10 0.12 0.16 0.20 0.04 0.08 0.10 0.12 0.16 0.20 External Static Pressure - in. w.g. External Static Pressure - in. w.g. *SP1 Limit airflow rate setting on the controller. *SP2 Limit airflow rate setting on the controller. *SP3 Limit *SP4...
  • Page 14 2.3.3. MMDB018S4 1060 1060 *SP2 *SP1 Limit Limit 0.04 0.10 0.16 0.24 0.32 0.40 0.48 0.56 0.64 0.04 0.10 0.16 0.24 0.32 0.40 0.48 0.56 0.64 External Static Pressure - in. w.g. External Static Pressure - in. w.g. *SP1 Limit airflow rate setting on the controller. *SP2 Limit airflow rate setting on the controller.
  • Page 15 2.3.4. MMDB024S4 1530 1530 1410 1410 1294 1294 1175 1175 1060 1060 *SP1 *SP2 Limit Limit 0.04 0.10 0.16 0.24 0.32 0.40 0.48 0.56 0.64 0.04 0.10 0.16 0.24 0.32 0.40 0.48 0.56 0.64 External Static Pressure - in. w.g. External Static Pressure - in.
  • Page 16 2.3.5. MMDB036S4 2120 2120 2000 2000 1885 1885 1765 1765 1650 1650 1530 1530 1410 1410 1295 1295 1175 1175 1060 1060 *SP1 Limit *SP2 Limit 0.04 0.10 0.16 0.24 0.32 0.40 0.48 0.56 0.64 0.04 0.10 0.16 0.24 0.32 0.40 0.48 0.56...
  • Page 17 2.3.6. MMDB048S4 2470 2470 2355 2355 2235 2235 2120 2120 2000 2000 1885 1885 1765 1765 1650 1650 1530 1530 1410 1410 1295 1295 1175 1175 1060 1060 *SP1 *SP2 Limit Limit 0.04 0.10 0.16 0.24 0.32 0.40 0.48 0.56 0.64 0.72 0.80...

  • Page 18: Mmdb Indoor Unit Dimensions

    2.4. MMDB Indoor Unit Dimensions MOUNTING LUGS (4) ELECTRICAL CONTROL FRESH AIR INTAKE TOP VIEW 3-5/8 (92) Diameter (009 thru 018) 5 (127) Diameter (024 thru 048) MOUNTING LUGS (4) SUPPLY AIR OPENING SIDE VIEW FRONT VIEW LIQUID PIPE NOTE - Outdoor air enters unit AFTER air filter. PIPE CONVENTIONAL DRAIN...

  • Page 19: Mmdb Indoor Unit Clearances

    2.5. MMDB Indoor Unit Clearances Wall 20 (508) Minimum Service Clearance (rear) MEDIUM STATIC DUCTED Flow UNIT * See footnote 24 (610) Minimum Service Clearance (front) Wall 24 (610) Minimum Service Clearance TOP VIEW Ceiling 1 (25) Minimum Clearance (top) * 1 (25) Minimum Clearance (bottom) Suspended Ceiling...

  • Page 20: Condensate Pump Lift - Mmdb And M22A/M33C

    2.6. Condensate Pump Lift - MMDB and STRUCTURAL CEILING M22A/M33C 8 in. 3 ft. (1 m) (203 mm) MMDB, M22A and M33C factory pumps have a 27 inch SUSPENSION RODS condensate pump lift. SUPPORT STRAPS 2.7. MMDB Condensate Drain Test Procedure DRAIN LINE CAUTION...

  • Page 21: Mmdb Indoor Unit Gravity Drain

    2.8. MMDB Indoor Unit Gravity Drain CAUTION Make sure that drain piping is properly routed and insulated in order to prevent both leaks and condensation. IMPORTANT Drain should have a slope of at least ¼ inch per foot and should be approved corrosion-resistant pipe. You must confirm operation of every drain and pump in the system as part of the commissioning procedure.

  • Page 22: Mwmc And 3Wmc-036 Wall Mounted Indoor Units

    3. MWMC and 3WMC-036 Wall Mounted Indoor Units 3.1. Model Number Identification M WM C 012 S 4 - 1 P Series Type Voltage M = Mini-Split L = 115V-1 phase-60hz P = 208/230V-1 phase-60hz Unit Type WM = Wall-Mounted Non-Ducted Unit Minor Design Sequence 1 = 1st Revision Major Design Sequence...

  • Page 23: Indoor Unit Specifications (009 - 012 Ton) Units

    3.2. Indoor Unit Specifications (009 - 012 Ton) Units Model No. MWMC006S4-*P MWMC009S4-*P MWMC012S4-*L MWMC012S4-*P * Indicates could be minor revision 1 or 2. Nominal Tons 0.50 0.75 Power Supply - 60 hz - 1 phase 208/230V 115V 115V 208/230V Rated load amps 0.25 0.25...

  • Page 24: Indoor Unit Dimensions (Mwmc And 3Wmc)

    3.5. Indoor Unit Dimensions (MWMC and 3WMC) Size MWMC012S4S-*L MWMC006S4S-*P 32-7/8 29-1/4 7-7/8 MWMC009S4S-*P MWMC012S4S-*P MWMC018S4S-*P 12-3/8 34-3/4 8-5/8 MWMC024S4S-*P 46-3/4 1187 13-1/2 42-1/2 1080 10-1/4 MWMC030S4S-*P 46-7/8 (1191) 14-5/8 (371) (279) FRONT VIEW SIDE VIEW BOTTOM VIEW Figure 11. 3WMC036S4 Indoor Unit Dimensions - Inches (mm)

  • Page 25: Indoor Unit Clearances (All Models And Sizes)

    3.6. Indoor Unit Clearances (All Models and Sizes) Ceiling 6” (152 mm) Minimum Clearance Wall Wall 5” 5” (127 mm) (127 mm) Minimum Minimum Vertical Clearance - Clearance to Floor - 72 inches (1829 mm) Minimum 96 inches (2438 mm) Recommended Floor FRONT VIEW 3.7.

  • Page 26: Dry Mode Operation - Mwmc And 3Wmc

    3.8. Dry Mode Operation - MWMC and 3. Press the mode button to scroll through the following 3WMC functions, one at a time: • COOL - Select lowest possible temperature. 3.8.1. Procedure • HEAT - Select highest possible temperature. 4. Let each function run for 5 minutes, and perform the 1.

  • Page 27: Ambient Temperature Is Below 63°F (17°C)

    3.11. Ambient Temperature is Below 63°F (17°C) You can’t use the remote controller to turn on the COOL function when the ambient temperature is below 17°C. In this instance, you can use the MANUAL CONTROL button to test the COOL function. AUTO COOL Manual control button...

  • Page 28: Mcfa And Mcfb Ceiling / Floor Indoor Units

    4. MCFA and MCFB Ceiling / Floor Indoor Units 4.1. Model Number Identification M CF A 024 S 4 - 1 P Series Type Voltage M = Mini-Split P = 208/230V-1 phase-60hz Unit Type Minor Design Sequence CF = Ceiling/Floor Non-Ducted...

  • Page 29: Indoor Unit Dimensions

    4.3. Indoor Unit Dimensions MCFA012S4, MCFA018S4 Mounting Brackets (2) (Furnished, 35-3/4 (908) Field Installed) (660) 7-7/8 Refrigerant (200) Piping 7-1/8 1-5/8 (41) (181) 39 (991) Refrigerant 3/4 (19) (203) FRONT VIEW BACK VIEW SIDE VIEW Piping Refrigerant Opening 3/4 (19) Piping 4 x 4 (100 x 100) 1-5/8 (41)

  • Page 30: Indoor Unit Clearances

    4.4. Indoor Unit Clearances CEILING APPLICATIONS (19) DROP CEILING 59 (1499) SUPPLY 1 (25) (Service Clearance Minimum SIDE VIEW CEILING AND FLOOR APPLICATIONS WALL WALL (610) (610) 1 (25) Minimum FRONT VIEW FLOOR APPLICATIONS Unit Flush with Wall SUPPLY 59 (1499) (Service Clearance Front of Unit) Floor...

  • Page 31: Mcfa And Mcfb Indoor Unit Control Board Switches Location

    4.5. MCFA and MCFB Indoor Unit Control Board Switches Location For Mode Conflict Setting (24k and smaller units only) Indoor Fan Speed Adjustment S1+S2 CCM Address (VRF only) Auto Restart Function Heating Temperature Pre-Heat Function Compensation Adjustment Adjustment Figure 14. MCFA and MCFB Main Control Switches...

  • Page 32: Mfma Floor Indoor Unit

    5. MFMA Floor Indoor Unit 5.1. Model Number Identification 5.2. Indoor Unit Specifications (012 Ton) Unit Model No. MFMA012S4 Nominal Tons Power Supply - 60 hz - 1 phase 208/230V Rated load amps Output (W) Room Temperature Cooling 62 - 90 Range (°F) Heating 32 - 86...

  • Page 33: Indoor Unit Dimensions

    5.3. Indoor Unit Dimensions MFMA012S4 8-1/4 (210) 27-1/2 (699) 7-11/16 (195) 23-5/8 Hanging (600) Brackets (2) Refrigerant SIDE VIEW Condensate Drain Piping Outlet FRONT VIEW BACK VIEW Figure 15. MFMA Indoor Unit Dimensions - Inches (mm) 5.4. Indoor Unit Clearances FRONT VIEW WALL WALL...

  • Page 34: Indoor And Outdoor Power And Communication Wiring Requirements

    6. 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 35: Wiring Guide

    6.2. Wiring Guide Table 2. Single Zone Mini-Split Wiring Guide Number of Systems System Capacity System Voltage Wire Type Wire Gauge Conductors Indoor to Outdoor Wiring (Communication/ 16AWG*4 Stranded, Power) 09K and 12K 115VAC Stranded unshielded 1, 2, 3 and GND Outdoor to Main Power MCA: 15A 09K and 12K...
  • Page 36 Table 3. Multi-Zone Installation Wiring Requirements System and Terminal Number of System Capacity System Voltage Wire Type Wire Gauge / MCA Designations Conductors Indoor to Outdoor Unit Indoor to Outdoor Wiring Stranded and 09K and 12K 208/230VAC 16AWG (Communication/Power) unshielded 1, 2, 3 and GND Outdoor to Main Power Stranded and...

  • Page 37: Terminal Connections

    6.3. 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 17. Single-Zone Wiring 30K and Below 208/230V Indoor Unit B 208/230V Indoor Unit A 208/230V Outdoor Unit Terminal Block Terminal Block Terminal Block...
  • Page 38 208/230V 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...

  • Page 39: Wired And Wireless Remotes

    The provided mini-split wireless controller model RG10A-CSWHB is a wireless local controller for Lennox mini-split indoor unit model M33C only. 7.4. M0STAT61Q-1 and M0STAT61Q-2 Wired Remotes The provided mini-split wired controller is a wireld local controller for Lennox mini-split indoor unit model MMDB only.

  • Page 40: Connection To Centralized Controller, On/Off And Alarm Devices

    8. Connection to Centralized Controller, ON/OFF and Alarm Devices 8.1. 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.

  • Page 41: Centralized Controller

    Centralized Controller unit main board. 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 42: Outdoor Unit Information

    Outdoor Unit Information 9. Single and Multiple Zone Outdoor Units NOTE: Outdoor units can only be installed in an unenclosed outdoor environment. 9.1. Model Number Identification M P C 009 S 4 S - 1 P Series Type Voltage M = Mini-Split L = 115V-1 phase-60hz P = 208/230V-1 phase-60hz Unit Type...

  • Page 43: Mpc Single-Zone Specifications (0.75 - 1.5 Ton)

    9.2. MPC Single-Zone Specifications (0.75 - 1.5 Ton) Nominal Size - Tons 0.75 Outdoor Unit Model No. MPC009S4S MPC012S4S-1L MPC018S4S MPC012S4S-1P Ambient Temperature Operating Cooling –13 - 122 –13 - 122 –13 - 122 Range - °F Heating –13 - 86 –13 - 86 –13 - 86 Energy Star...

  • Page 44: Mpc Single-Zone Specifications (2 - 4 Ton)

    9.3. MPC Single-Zone Specifications (2 - 4 Ton) Nominal Size - Tons Outdoor Unit Model No. MPC024S4S MPC030S4S MPC036S4S MPC048S4S Cooling –13 - 122 –13 - 122 –13 - 122 –13 - 122 Ambient Temperature Operating Range - °F Heating –13 - 86 –13 - 86 –13 - 86...

  • Page 45: 3Pc Single-Zone Specifications

    9.4. 3PC Single-Zone Specifications Outdoor Unit Model No. 3PC036S4S Nominal Tons Ambient Temperature Cooling 5 - 122 Operating Range - °F Heating 5 - 86 Energy Star Sound Data (dBA) Cooling/Heating 61.5 Refrigerant (R-410A) Charge furnished 7 lbs. 5 oz. Maximum line length with furnished charge - ft.

  • Page 46: Mlb Single-Zone Specifications (0.75 - 2 Ton)

    9.5. MLB Single-Zone Specifications (0.75 - 2 Ton) Nominal Size - Tons 0.75 Outdoor Unit Model No. MLB009S4S-1P MLB012S4S-1P MLB018S4S-1P MLB024S4S-1P Cooling –22 - 122 –22 - 122 –22 - 122 –22 - 122 Ambient Temperature Operating Range - °F Heating –22 - 86 –22 - 86...

  • Page 47: Mlb Single-Zone Specifications (3 - 4 Ton)

    9.6. MLB Single-Zone Specifications (3 - 4 Ton) Nominal Size - Tons Outdoor Unit Model No. MLB036S4S MLB048S4S Cooling –22 - 122 –22 - 122 Ambient Temperature Operating Range - °F Heating –22 - 86 –22 - 86 Energy Star Certified? Cooling Sound Data (dBA) Heating...

  • Page 48: Mpc Multi-Zone Specifications (1.5 - 2.5 Ton)

    9.7. MPC Multi-Zone Specifications (1.5 - 2.5 Ton) Nominal Size - Tons MPC024S4M Outdoor Unit Model No. MPC018S4M MPC030S4M Up to 3 Number of Zones Up to 3 Cooling –13 - 122 –13 - 122 –13 - 122 Ambient Temperature Range - °F Heating –13 - 86...

  • Page 49: Mpc Multi-Zone Specifications (3 - 4 Ton)

    9.8. MPC Multi-Zone Specifications (3 - 4 Ton) Nominal Size - Tons Outdoor Unit Model No. MPC036S4M MPC048S4M Number of Zones Up to 4 Up to 5 Cooling –13 - 122 –13 - 122 Ambient Temperature Range - °F Heating –13 - 86 –13 - 86 Cooling...

  • Page 50: Mlb Multi-Zone Specifications (1.5 - 3 Ton)

    9.9. MLB Multi-Zone Specifications (1.5 - 3 Ton) Nominal Size - Tons Outdoor Unit Model No. MLB018S4M MLB030S4M MLB036S4M Number of Zones Up to 3 Up to 4 Cooling –22 - 122 –22 - 122 –22 - 122 Ambient Temperature Range - °F Heating –22 - 86 –22 - 86...

  • Page 51: Mlb Multi-Zone Specifications (4 Ton)

    9.10. MLB Multi-Zone Specifications (4 Ton) 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) Cooling Heating Refrigerant Charge furnished (R-410A) 10 lbs.

  • Page 52: Single-Zone Outdoor Unit Dimensions

    9.11. Single-Zone Outdoor Unit Dimensions TYPICAL APPEARANCE OF UNITS Unit of Model Measurement inches 32-7/8 17-3/4 21-7/8 11-7/8 12-3/8 MPC006S4S-*P MPC009S4S-*P MPC012S4S-*L MPC012S4S-*P inches 37-5/8 26-1/8 26-1/2 12-3/4 MPC018S4S-*P MPC024S4S-*P inches 37-1/4 26-1/2 37-7/8 15-7/8 MPC030S4S-*P MPC036S4S-*P 3PC036S4S-*P inches 41-1/8 27-7/8 44-5/8 16-3/8...

  • Page 53: Multi-Zone Outdoor Unit Dimensions

    9.12. Multi-Zone Outdoor Unit Dimensions TYPICAL APPEARANCE OF UNITS Unit of Model Measurement inches 26-1/8 26-1/2 12-3/4 13-3/4 MPC018S4M-*P 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 52-1/2 16-3/8 17-5/8 MPC048S4M-*P 1060 1334 inches 40-5/8 26-1/2 31-7/8 15-1/8 15-7/8...

  • Page 54: Outdoor Unit Clearances

    9.13. Outdoor Unit Clearances 9.13.1. 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 55 9.13.2. 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 56: Indoor / Outdoor Unit Combinations

    10. Indoor / Outdoor Unit Combinations 10.1. MPC Multi-Zone System Combinations Table 5. 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. Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Number...
  • Page 57 Table 5. 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. Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Number Outdoor Unit Capacity...
  • Page 58 Table 5. 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. Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Number Outdoor Unit Capacity...
  • Page 59 Table 5. 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. Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Number Outdoor Unit Capacity...
  • Page 60 Table 5. 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. Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Number Outdoor Unit Capacity...
  • Page 61 Table 5. 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. Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Number Outdoor Unit Capacity...

  • Page 62: Mlb Multi-Zone System Combinations

    10.2. MLB Multi-Zone System Combinations Table 6. MLB 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. Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Number Outdoor Unit...
  • Page 63 Table 6. MLB 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. Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Number Outdoor Unit Capacity...
  • Page 64 Table 6. MLB 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. Indoor Unit Nominal Cooling Capacity at Rated Nominal Heating Capacity at Rated Number Outdoor Unit Capacity...

  • Page 65: Refrigeration Pipe Work

    11. Refrigeration Pipe Work 11.1. MPC and 3PC Single-Zone Refrigerant Cycle Diagram Electronic CAPILIARY TUBE expansion valve CAPILIARY TUBE LIQUID SIDE 2-WAY VALVE T3 Condenser temp. sensor Indoor Coil Outdoor Coil T4 Ambient T1 Room temp. temp. sensor sensor T2 Evaporator temp.

  • Page 66: Mpc Three-Zone Refrigerant Cycle Diagram

    11.3. 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 67: Mpc Five-Zone Refrigerant Cycle Diagram

    11.5. 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 68: Single-Zone Piping Limitations

    11.7. 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 69 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.

  • Page 70: Master Valves (3 To 5 Zone Outdoor Units)

    12. 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 71: Mpc Multi-Zone Outdoor Unit Connections And Line Set Usage

    13. MPC Multi-Zone Outdoor Unit Connections and Line Set Usage Table 7. MPC018S4M Number of Zones and Outdoor Unit Connection Sizes NOTE - Letter = Indoor Unit Zone Connection on Outdoor Unit Zone 1 (A) Zone 2 (B) 1/4 in. liq + 3/8 in. gas 1/4 in.
  • Page 72 Table 9. 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) 1/4 in. liq + 3/8 in. gas 1/4 in. liq + 3/8 in. gas 1/4 in.
  • Page 73 Figure 31. 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 74 Figure 31. 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 75 Table 10. 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 76 Table 10. 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 77 Table 10. 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 78 Table 10. 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 79: Mlb Multi-Zone Outdoor Unit Connections And Line Set Usage

    Table 10. 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 80 Table 12. MLB030S4M 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 1/4 in. liq + 3/8 in. gas 1/4 in.
  • Page 81 Table 14. MLB048S4M 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 82 Table 14. MLB048S4M 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 83: Power And Communication Wiring For Systems

    15. 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 84: Outdoor Unit Condensate Piping

    16. 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 85: Mpc Condensate Pump Diagrams

    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: Installation Requirements

    18. Installation Requirements 18.1. 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 87 Table 17. Line Set Length - Meters (Feet) Length 1 Drive 2 1 Drive 3 1 Drive 4 1 Drive 5 Max. length for all rooms (m) 40 (131) 60 (197) 80 (262) 80 (262) Max. length for one IU (m) 25 (82) 30 (98) 35 (115)
  • Page 88 • When the electronic scale displays the proper weight • Air purging of the charge hose - Open the handle (refer to the table), disconnect the charge hose from Lo valve of the manifold valve slightly to purge air the 3-way valve’s service port immediately and turn from the charge hose for 5 seconds and then close it off the air conditioner before disconnecting the hose.

  • Page 89: Electronic Function

    18.2.8. Evacuation after Servicing the Outdoor • Always leak check after servicing the refrigerant Unit Refrigeration Circuit system. There are one low-pressure centralized valve and one high- pressure centralized valve, it will be more time saving when 18.2.8.1 Evacuation Complete vacuum and recycle refrigerant.

  • Page 90: Adding Refrigerant - Multi-Zone Systems

    20.2. Adding Refrigerant - Multi-Zone Systems The outdoor unit is factory-charged with refrigerant. Calculate the additional refrigerant required according to the length of the liquid pipe (one way) between the outdoor unit and indoor unit connections. Be sure to add the proper amount of additional refrigerant. Failure to do so may result in reduced performance.

  • Page 91: Single-Zone Outdoor Unit Led Locations

    21. Single-Zone Outdoor Unit LED Locations Single-zone outdoor units display flash codes on the main board. The main board is accessed through the top of the unit. 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.

  • Page 92: Multi-Zone Outdoor Unit Leds And Sw1 Locations

    22. Multi-Zone Outdoor Unit LEDs and SW1 Locations Push the switch SW1 to check 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 Figure 37.

  • Page 93: Specifications And Operations

    23. 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 94: Pressure On Service Port

    24. Pressure on Service Port 24.1. Cooling Charts 24.1.1. Cooling Mode Table 8. Cooling Charge - Cooling Mode Outdoor temp. ℉ Indoor Temp. （ （ （ （ （ 23.89） 29.44） 35） 40.56） 46.11） ℃) 24.1.2. Pressure (PSI) .PSI Outdoor temp. 105F 115F 75F （23.89）85F （29.44...

  • Page 95: Capacity Request Calculations

    24.2.2. Pressure (PSI) Outdoor 57F (13.89) 47F (8.33) 37F (2.78) (-2.78) (-8.33) 24.3. Capacity Request Calculations Total capacity Request=Σ(Norm code × HP) /10× modify rate+ correction. T1 Ts Figure 38. 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 96 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 97 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%...

  • Page 98: Defrost Control

    24.4. 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 99: Outdoor Fan Control

    24.7. Outdoor Fan Control 24.7.1. 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 100: Four-Way Valve Control

    24.7.2. 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 24.8. Four-Way Valve Control In heating mode, four-way valve is opened. In defrosting, four-way valve operates in according to defrosting action. In other modes, four-way valve is closed.
  • Page 104 Blower Data - MMDB Indoor Units 12 3WMC and MWMC Wall Mounted Indoor Units 22 M22A and M33C Indoor Units 3 MCFA and MCFB Ceiling / Floor Indoor Units 28, 32 Centralized Controller 40 MMDB Ducted Indoor Units 10 Clearances...

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