Lennox MPA024S4S-*P Installation Instructions Manual
Single-zone mini-split systems,ceiling / floor indoor units
mla series,mpa series,mpb series,mcfa series,mcfb series
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Table of Contents
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2017 Lennox Industries Inc.
©
Dallas, Texas, USA
Table of Contents
General ...........................................................................1
Included Parts.................................................................2
Indoor / Outdoor Unit Match-Ups....................................2
Model Number Identification ...........................................3
Typical Single-Zone System Components......................4
System Dimensions .......................................................5
Outdoor Units ..............................................................5
Indoor Units .................................................................6
System Clearances ........................................................6
Outdoor Unit ................................................................6
Indoor Unit ...................................................................7
Torque Requirements for Caps and Fasteners...............7
Indoor Unit Installation ....................................................7
Unit Placement Considerations ...................................7
Floor Installation ..........................................................8
Ceiling Installation .......................................................8
Indoor Unit Condensate Piping Connections ...............9
Outdoor Unit Installation ...............................................10
Placement Considerations .........................................10
Direct Sunlight, Rain, Snow and Ice Protection .........10
Prevailing Winds ........................................................11
Buried Refrigerant Pipe Protection ............................12
Outdoor Unit Condensate Piping ...............................12
Securing the Outdoor Unit .........................................12
Refrigerant Piping Connections ....................................13
Leak Test and Evacuation ............................................14
Leak Test ...................................................................14
Triple Evacuation Procedure......................................14
Wiring Connections ......................................................15
Outdoor Unit .............................................................15
Indoor Unit .................................................................15
Unit Start-Up .................................................................23
Adding Refrigerant for Longer Line Set ........................23
Troubleshooting ............................................................23
Test Run .......................................................................23
Pre-Checks ................................................................23
Procedure ..................................................................23
Dry Mode Operation (Dehumidification) .......................24
Procedure ..................................................................24
Sequence of Operation ..............................................24
INSTALLATION
INSTRUCTIONS
MLA/MPA/MPB and
MCFA/MCFB Series
SINGLE-ZONE MINI-SPLIT SYSTEMS
(208/230V) --
Ceiling / Floor Indoor Units
507548-06
4/2017
Supersedes 10/2016
THIS MANUAL MUST BE LEFT WITH THE OWNER
FOR FUTURE REFERENCE
WARNING
Improper installation, adjustment, alteration, ser vice or
maintenance can cause property damage, personal
injury or loss of life.
Installation and service must be performed by a li censed
professional HVAC installer (or equivalent) or a service
agency.
WARNING
The clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs, and HFCs) as of July, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for non-compliance.
WARNING
This product contains a chemical known to the State
of California to cause cancer, birth defects, or other
reproductive harm.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
General
Refer to the Product Specifications bulletin (EHB) for more
product information.
These instructions are intended as a general guide and
do not supersede local or national codes in any way.
Authorities having jurisdiction should be consulted before
installation.
The MCFA and MCFB Ceiling/Floor indoor units are
matched with an outdoor heat pump unit to create a mini-
split system that uses HFC-410A refrigerant.
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Table of Contents
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Summary of Contents for Lennox MPA024S4S-*P
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS 2017 Lennox Industries Inc. © MLA/MPA/MPB and Dallas, Texas, USA MCFA/MCFB Series SINGLE-ZONE MINI-SPLIT SYSTEMS (208/230V) -- Ceiling / Floor Indoor Units 507548-06 4/2017 Table of Contents Supersedes 10/2016 General ................1 Included Parts..............2 THIS MANUAL MUST BE LEFT WITH THE OWNER Indoor / Outdoor Unit Match-Ups........2... -
Page 2: Included Parts
Parts Figure Quantity Parts Figure Quantity Drain connector Seal ring Indoor / Outdoor Unit Match-Ups Outdoor Unit Indoor Unit Voltage 208/230V MPA024S4S-*P or MPB024S4S-*P MCFA024S4-*P 208/230V MPA036S4S-*P or MPB036S4S-*P MCFA036S4-*P 208/230V MPA048S4S-*P or MPB048S4S-*P MCFA048S4-*P 208/230V MPB018S4S-*P MCFB018S4-2P 208/230V MLA018S4S-*P... -
Page 3: Model Number Identification
Model Number Identification OUTDOOR SINGLE ZONE HEAT PUMP UNITS M P A 009 S 4 S - 1 P Series Type Voltage M = Mini-Split P = 208/230V-1 phase-60hz Unit Type L = Low Ambient Heat Pump Minor Design Sequence P = Heat Pump 1 = 1st Revision Refrigerant Circuits... -
Page 4: Typical Single-Zone System Components
Typical Single-Zone System Components MPORTANT - Condensate drain line must always be located at the bottom of the Line set bundle.) (wrapped in foam insulation) Wiring Communication cable Suppl y Air 036 and 048 only Indoor unit wiring connections Tape Condensate drain line (wrapped in foam insulation) Refrigerant Line Set, Condensate Line... -
Page 5: System Dimensions
System Dimensions Outdoor Units TYPICAL APPEARANCE OF UNITS Unit of Model Measurement inches 40-5/8 25-1/4 31-7/8 15-1/8 MPA024S4S-*P MPA036S4S-*P 1032 inches 40-1/4 53-3/4 15-3/8 MPA048S4S-*P 1023 1365 inches 21-1/4 27-5/8 14-1/4 13-3/4 MPB018S4S-*P inches 40-1/2 26-1/2 31-7/8 16-1/8 15-7/8 MPB024S4S-*P... -
Page 6: Indoor Units
Indoor Units 26-5/8 8-3/4 (676) (222) 9-1/4 (235) FRONT VIEW SIDE VIEW BACK VIEW 4-3/4 (120) BOTTOM VIEW (152) (203) 9-1/2 (241) Model No. MCFA024S4S-*P 42-1/8 1070 MCFA036S4S-*P 50-5/8 1286 47-3/8 1203 MCFA048S4S-*P 1651 61-3/4 1568 MCFB018S4S-*P 42-1/8 1070 Figure 3. MCFA and MCFB Indoor Unit Dimensions - Inches (mm) System Clearances Outdoor Unit 24 (610) -
Page 7: Indoor Unit
Unit Placement Considerations See the Lennox Service and Application Notes C-08-1 for further details and information. AVOID Do not install the unit in the following locations: •... -
Page 8: Floor Installation
• Areas exposed to salt or other corrosive materials or caustic gases Side Panel • Areas exposed to extreme voltage variations (such as factories • Tightly enclosed areas that may impede service of the unit • Areas exposed to fossil fuels (such as oil or gas in kitchens) •... -
Page 9: Indoor Unit Condensate Piping Connections
8. Hang the unit by sliding the factory-installed hanging brackets on to the threaded rods between the sets of washers and nuts. 9. Use the leveling nut (beneath hanging brackets) to adjust the unit to the correct height. Remove the electrical tape holding the upper washers and nuts in place and tighten each of the four nuts above the brackets down onto the brackets. -
Page 10: Outdoor Unit Installation
• Since water drains from the outdoor unit during vari- Outdoor Unit Installation ous stages of operation, do not place anything which may be damaged by moisture under the unit Placement Considerations Direct Sunlight, Rain, Snow and Ice Protection CAUTION •... -
Page 11: Prevailing Winds
mm) from the unit as illustrated in “Figure 18. Wind Barrier” • When prevailing wind is into the discharge side, then Air Inlet position the wind barrier a minimum 79 inches (2007 mm) from the front of the unit as illustrated in “Figure Air Outlet 18. -
Page 12: Buried Refrigerant Pipe Protection
CAUTION Roof Damage! This system contains both refrigerant and oil. Some rubber roofing material may absorb oil. This will cause 24 in the rubber to swell when it comes into contact with oil. 610 mm 12 in 305 mm The rubber will then bubble and could cause leaks. Protect the roof surface to avoid exposure to refrigerant and oil during service and installation. -
Page 13: Refrigerant Piping Connections
Refrigerant Piping Connections Field piping consists of two copper lines connecting the CANT ON THE OUTSIDE OF outdoor unit to the indoor unit. “Table 2. Refrigerant Piping THE FLARE and Indoor Unit Connection Sizes” lists the connection sizes. The connections are made using the provided brass MALE FLARE flare nuts at the end of the refrigerant piping connections. -
Page 14: Leak Test And Evacuation
Table 4. Refrigerant Line Set Requirements 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... -
Page 15: Wiring Connections
Torr). IMPORTANT 4. Break the vacuum by allowing nitrogen into the port connections (liquid and gas line pipes) until a positive This unit must be properly grounded and protected by a pressure is achieved circuit breaker. The ground wire for the unit must not be connected to a gas or water pipe, a lightning conductor 5. - Page 16 IMPORTANT All diagrams (Figure 29 through Figure 39) are typical wiring diagrams. Refer to the wiring diagram on the unit for actual wiring. 208/230V Indoor Unit 208/230V Outdoor Unit Terminal Block Terminal Block L1 L2 From Power Supply Outdoor Unit Indoor Unit Figure 27.
- Page 17 • • • • • COMPONENT IN DASH Inductor INDOOR UNIT MAINBOARD LINE IS OPTIONAL OR FIELD WIRING. Ceiling-Floor Type CN18 CN1 5 DC MOTOR F O R S E T T IN G AU T O -R E S TAR T DRIVER MODULE CN21 Note: The...
- Page 18 INDOOR UNIT MAINBOARD In d u c to r Ceiling-Floor Type CN18 CN1 3 CN21 DC MOTOR DRIVER MODULE FAN1 CN24 SWING VSWING(INACTIVE) TO PROGRAMMA BLE CN40 WIRED CONTROLLER DISPLA Y TO WI RED CN10A BOARD CONTRO LLER BLACK INDO OR C OIL T EMP. SENS OR WHITE ROOM TEMP.
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Page 19: Control Board
Compressor L-OUT COMPRESSOR DISCHARGE Control Board TEMP.SENSOR CN10 YELLOW PAN HEATER CRANK CASE HEATER Figure 33. 208/230V MPA024S4S-*P Outdoor Unit Wiring Diagram BLACK COMP BLUE COMPRESSOR DISCHARGE TEMP. SENSOR CODE PART NAME COMPRESSOR COMP CN34 CN12 CN11 CN20 ELECTRIC EXPANSION... - Page 20 YELLOW YELLOW Compressor and Outdoor Fan Control Board CODE PART NAME BLACK COMPRESSOR COMP CN15 CN14 AC CURRENT DETECTOR BLUE DIODE MODULE CN39 DCFAN1,DCFAN2 OUTDOOR DC FAN HEAT_Y CRANKCASE HEATER HEAT_D PAN HEATER H-PRO HIGH PRESSURE SWITCH PFC INDUCTOR CN22 L-PRO LOW PRESSURE SWITCH CN11...
- Page 21 BLACK CO MP FM 1 BLUE CN34 CN20 4-WAY VALVE BLUE BLACK BLUE CN22 DRIVER BOARD CN33 BLUE BLACK HEAT1 BLA CK CN54 CN40 BLUE CN51 BLACK CN10 HEAT2 BLACK CN53 CN44 BLUE CN52 H-P R O BLACK L-P R O YELLOW YELLOW C ODE...
- Page 22 BLACK COMP BLUE BLACK CN33 CN20 BLUE YELLOW 4-WAY1 CN54 BLUE BLACK BLUE BLUE CN51 HEAT1 CN53 CN10 Crankcase Heater BLUE CN22 CN52 CN40 HEAT2 CN44 Base Pan Heater YELLOW YELLOW H-PRO CODE PART NAME BLACK L-PRO COMPRESSOR COMP CAP1 FAN MOTOR CAPACITOR ELECTRIC EXPANSION VALVE...
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Page 23: Unit Start-Up
Unit Start-Up Troubleshooting IMPORTANT Table 7. Troubleshooting Codes Code Description Units should be energized 24 hours before unit start-up Indoor unit EEPROM error to prevent compressor damage as a result of slugging. Communication error between indoor unit and outdoor unit 1. -
Page 24: Dry Mode Operation (Dehumidification)
Table 8. Test Run Checklist Checks Pass Fail No electrical leakage Unit is properly grounded All electrical terminals properly covered Indoor and outdoor units are solidly installed All pipe connection points do Outdoor Indoor not leak (2): (2): Water drains properly from drain hose All piping is properly insulated...