Lennox MPA048S4S-*P, MCFA024S4-*P, MPB024S4S-*P, MPA036S4S-*P, MPB036S4S-*P Installation Instructions Manual
...
INSTALLATION
©
2017 Lennox Industries Inc.
Dallas, Texas, USA
Table of Contents
General ...........................................................................1
Included Parts.................................................................2
Indoor / Outdoor Unit Match-Ups....................................2
Model Number Identication ...........................................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 (Dehumidication) .......................24
Procedure ..................................................................24
Sequence of Operation ..............................................24
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 Specications 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 minisplit system that uses HFC-410A refrigerant.
Included Parts
Package 1 of 1 contains the following:
1 - Assembled Indoor Unit
Parts Figure Quantity Parts Figure Quantity
M0STAT60Q-1
Wireless controller
Wireless control
holder with 2 mounting
screws
1
1 Batteries (AAA) 2
Installation and owner’s
manual
1 ea.
The assembled indoor unit will include the following items:
1 - Assembled Outdoor Unit and the following items:
Parts Figure Quantity Parts Figure Quantity
Drain connector 1 Seal ring 1
Indoor / Outdoor Unit Match-Ups
Outdoor Unit Indoor Unit Voltage
MPA024S4S-*P or MPB024S4S-*P MCFA024S4-*P
MPA036S4S-*P or MPB036S4S-*P MCFA036S4-*P
MPA048S4S-*P or MPB048S4S-*P MCFA048S4-*P
208/230V
208/230V
208/230V
MPB018S4S-*P MCFB018S4-2P
MLA018S4S-*P MCFB018S4-2P
MLA024S4S-*P MCFA024S4-2P
208/230V
208/230V
208/230V
2
Model Number Identication
OUTDOOR SINGLE ZONE HEAT PUMP UNITS
M P A 009 S 4 S - 1 P
Series Type
M = Mini-Split
Unit Type
L = Low Ambient Heat Pump
P = Heat Pump
Major Design Sequence
A = 1st Generation
B = 2nd Generation
Nominal Cooling Capacity
018 = 1.5 tons
024 = 2 tons
036 = 3 tons
048 = 4 tons
CEILING/FLOOR NON-DUCTED INDOOR UNITS
M CF A 018 S 4 - 1 P
Series Type
M = Mini-Split
Voltage
P = 208/230V-1 phase-60hz
Minor Design Sequence
1 = 1st Revision
Refrigerant Circuits
S = Single Circuit
Refrigerant Type
4 = HFC-410A
Cooling Efciency
S = Standard Efciency
Voltage
P = 208/230V-1 phase-60hz
Unit Type
CF = Ceiling/Floor Non-Ducted
Major Design Sequence
A = 1st Generation
B = 2nd Generation
Nominal Cooling Capacity
018 = 1.5 tons
024 = 2 tons
036 = 3 tons
048 = 4 tons
Minor Design Sequence
1 = 1st Revision
2 = 2nd Revision
Refrigerant Type
4 = HFC-410A
Cooling Efciency
S = Standard Efciency
3
Typical Single-Zone System Components
IMPORTANT - Condensate drain line must always
be located at the bottom of the
bundle.)
Wiring
Line set
(wrapped in foam insulation)
Supply Air
Indoor unit wiring connections
Condensate drain line
(wrapped in foam insulation)
Refrigerant Line Set, Condensate Line
And Indoor / Outdoor Cable
Filter
Indoor Unit
Return Air
Wireless Remote
Control
Utility
Bundle
UV-rated tape (field-provided)
IMPORTANT - The refrigerant
metering device for this system is
located in the outdoor unit. This
makes it necessary to insulate the
Communication cable
036 and 048 only
Tape
(field-provided)
refrigerant lines individually to
prevent sweating.
Outdoor Unit
012-036 shown
208/230V Outdoor Unit
Terminal Block
1 2 3 L1 L2
Liquid and vapor shut off valves
Figure 1. Typical System Shown
4
Access cover
for valves
Condensate drain
from Indoor Unit
To Indoor
Unit
Communication Cable
036 and 048 only
TO INDOOR COMM. BUS
NOTE：
LLEY WO
ARG Y
S1
XT2
Use 2-conductor
shielded wire
S2
To Power
Supply
System Dimensions
A
E
D
B
C
TYPICAL APPEARANCE OF UNITS
Outdoor Units
Model
MPA024S4S-*P
MPA036S4S-*P
MPA048S4S-*P
MPB018S4S-*P
MPB024S4S-*P
MPB036S4S-*P
MPB048S4S-*P
MLA024S4S-*P
Unit of
Measurement
inches 40-5/8 25-1/4 31-7/8 15-1/8 16
mm 1032 641 810 384 406
inches 40-1/4 25 53-3/4 15-3/8 16
mm 1023 635 1365 391 406
inches 36 21-1/4 27-5/8 14-1/4 13-3/4
mm 914 540 702 363 350
inches 40-1/2 26-1/2 31-7/8 16-1/8 15-7/8
mm 1032 673 810 410 403
inches 41-1/8 25 52-1/2 16-1/8 15-7/8
mm 1045 634 1333 415 404
inches 40-3/4 26-1/2 31-7/8 15-1/8 16
mm 1035 673 810 384 406
A B C D E
Figure 2. Outdoor Unit Dimensions - Inches (mm)
5
Indoor Units
4
(222)
26-5/8
(676)
9-1/4
(235)
SIDE VIEW
FRONT VIEW
5-1/2
(139)
B
A
BACK VIEW
4-3/4
BOTTOM VIEW
(120)
6
(152)
8
9-1/2
(203)
(241)
Model No.
in. mm in. mm
A B
MCFA024S4S-*P 42-1/8 1070 39 991
MCFA036S4S-*P 50-5/8 1286 47-3/8 1203
MCFA048S4S-*P 65 1651 61-3/4 1568
8-3/
MCFB018S4S-*P 42-1/8 1070 39 991
Figure 3. MCFA and MCFB Indoor Unit Dimensions - Inches (mm)
System Clearances
Outdoor Unit
24 (610)
12
(305)
1
Minimum rear clearance can be 6 inches (152 mm) when mounted on brackets
and with no obstructions on the other three sides.
24
(610)
79
(2007)
Air Outlet
Air Inlet
1
12
(305)
Figure 4. Outdoor Unit Clearances - Inches (mm)
6
Indoor Unit
CEILING APPLICATIONS
3/4
(19)
SIDE VIEW
59 (1499)
(Service Clearance
DROP CEILING
SUPPLY
AIR
WALL WALL
24
(610)
CEILING AND FLOOR APPLICATIONS
FLOOR APPLICATIONS
FRONT VIEW
Unit Flush with Wall
SUPPLY
AIR
59 (1499)
(Service Clearance
Front of Unit)
24
(610)
Figure 5. Indoor Unit Clearances - Inches (mm)
Torque Requirements for Caps and
Fasteners
When servicing or repairing HVAC components, ensure
the fasteners are appropriately tightened. “Table 1. Torque
Requirements” provides torque values for fasteners.
IMPORTANT
Only use Allen wrenches of sufcient hardness (50Rc -
Rockwell scale minimum). Fully insert the wrench into
the valve stem recess.
Service valve stems are factory-torqued from 9 ft.-lbs.
(12 N) for small valves, to 25 ft.-lbs. (34 N) for large
valves) to prevent refrigerant loss during shipping and
handling. Using an Allen wrench rated at less than 50Rc
risks rounding or breaking off the wrench, or stripping
the valve stem recess.
See the Lennox Service and Application Notes C-08-1
for further details and information.
Table 1. Torque Requirements
Parts
Service valve cap 8 ft.-lb. 11
Sheet metal screws 16 in.-lb. 2
Machine screws #10 27 in.-lb. 3
Compressor bolts 7 ft.-lb. 10
Gauge port seal cap 8 ft.-lb. 11
Recommended Torque
U.S. Newton-Meter- N
Indoor Unit Installation
CAUTION
In order to avoid injury, take proper precaution when
lifting heavy objects.
Unit Placement Considerations
AVOID
Do not install the unit in the following locations:
• Areas exposed to petrochemicals or petrochemical
products
7
• Areas exposed to salt or other corrosive materials or
Electrical
Connections
Refrigerant / Drain
Pipe Connections
caustic gases
• 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)
• Areas exposed to strong electromagnetic forces
• Areas exposed to acids or alkaline detergents
DO
• Place the unit so that it is not exposed to direct sunlight
• Ensure the structural ceiling can support the weight of
the unit
• Select a location where condensate line will have the
shortest run to a suitable drain per local codes.
• Allow sufcient space around unit for proper operation
and maintenance
• Install unit a minimum of 3 feet (1m) away from any
antenna, power cord (line) radio, telephone, security
system, or intercom. Electrical interference and radio
frequencies from any of these sources may affect operation
• Be sure to instruct customers how to properly operate
the unit (especially maintenance of air lter, and operation procedure) by having them carry out operations
themselves while looking at the manual provided with
the controller
Side Panel
Factory Installed
Hanging Brackets
Grille
Side Panel
Figure 7. Remove Side Panel and Grille
2. Install four mounting bolts (appropriate for your
application) to the wall. See “Figure 3. MCFA and
MCFB Indoor Unit Dimensions - Inches (mm)” on
page 6 to ensure proper positioning of the bolts.
3. Upon conrming the four bolts are level, correctly
spaced and secured to the wall; lift the unit onto the
brackets. Conrm the unit is level before continuing.
Field-Installed
Mounting Bolts
Floor Installation
• Locate a suitable position within the space where
maintenance access and supply air will not be restricted or affected by obstacles. See “Figure 5. Indoor Unit
Clearances - Inches (mm)” on page 7 for minimum
clearances
• Place the MCFA or MCFB on a wall which is both ca-
pable of supporting the unit’s weight and which is con-
structed to enable the unit to t ush on the wall. An
uneven wall may lead to vibration and subsequent unit
damage
Figure 6. Floor / Wall Applications
Units are wall mounted using factory-installed hanging
brackets.
1. Remove the side panels and grille to expose factoryinstalled hanging brackets on the sides of the unit.
Factory Installed
Hanging Brackets
Figure 8. Hang Unit on Mounting Bolts
Ceiling Installation
• Locate a suitable position within the space where
maintenance access and supply air will not be restricted or affected by obstacles
• Suspend the unit from a ceiling which is capable of
supporting the unit’s weight
Units are suspended from the ceiling using factory-
installed hanging brackets.
1. Remove the side panels and grille to expose factoryinstalled hanging brackets on the sides of the unit
8
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