Lennox MWHA018S4-1P, MWHA009S4-1L, MWHA024S4-1P, MWHA012S4-1L, MHA009S4S-1P Installation Instructions Manual
...
INSTALLATION
©
2019 Lennox Industries Inc.
Dallas, Texas, USA
Table of Contents
General ...........................................................................1
Use of Mini-Split System During Construction................1
Included Parts.................................................................2
Catalog Numbers............................................................2
Model Number Identication ...........................................3
Typical System Components ..........................................4
System Dimensions ........................................................4
Outdoor Units ..............................................................4
Indoor Units .................................................................5
Indoor Unit Wall Mounts ..............................................5
System Clearances ........................................................5
Outdoor Unit ................................................................5
Indoor Unit ...................................................................6
Multiple Outdoor Units .................................................6
Torque Requirements for Caps and Fasteners...............7
Indoor Unit Installation ....................................................7
Unit Placement Considerations ...................................7
Determining Wall Mounting Plate Location ..................7
Installation of Wall Mounting Plate...............................7
Installation of Wall Sleeve............................................8
Installation of Indoor Unit on Wall Mounting Plate .......8
Indoor Unit Condensate Piping Connections ...............8
Outdoor Unit Installation .................................................9
Placement Considerations ...........................................9
Direct Sunlight, Rain and Ice Protection ......................9
Condensate Piping ....................................................10
Buried Refrigerant Pipe Protection ............................10
Securing the Outdoor Unit .........................................11
Refrigerant Piping Connections ....................................11
Adding Refrigerant for Longer Line Set ........................13
Leak Test and Evacuation ............................................13
Leak Test ...................................................................13
Triple Evacuation Procedure......................................13
Wiring Connections ......................................................14
Outdoor Unit .............................................................14
Indoor Unit .................................................................14
Wiring Diagrams ........................................................16
Unit Start-Up .................................................................18
Troubleshooting ............................................................18
Test Run .......................................................................19
Pre-Checks ................................................................19
Procedure ..................................................................19
Test Run Checklist ........................................................19
Double-Check Line Set Connections............................19
Ambient Temperature is Below 63ºF (17ºC) .................19
INSTRUCTIONS
MHA Series Units
SINGLE-ZONE MINI-SPLIT SYSTEM
(115V and 208/230V)
507927-01 6/2019
Supersedes 3/2019
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 licensed professional HVAC installer (or equivalent) or a
service agency.
CAUTION
In order to avoid injury, take proper precaution when
lifting heavy objects.
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.
This wall-mounted indoor unit is matched with an outdoor
heat pump unit to create a mini-split system that uses
HFC-410A refrigerant.
Use of Mini-Split System During
Construction
Lennox does not recommend the use of its mini-split
systems during any phase of construction. Very low return
air temperatures, harmful vapors and operation of the unit
with clogged or misplaced lters will damage the system.
However, mini-split systems may be used for cooling of
buildings under construction, if the following conditions
are met:
• Air lter must be installed in the system and must be
maintained during construction.
• Air lter must be replaced upon construction completion.
• The indoor wall unit assembly must be thoroughly
cleaned following nal construction clean-up.
• All mini-split operating conditions must be veried ac-
cording to these installation instructions.
Included Parts
The assembled indoor unit will include the following items:
Table 1. Included Parts
Parts Figure Quantity Parts Figure Quantity
ON/OFF
SILENCE
Wireless controller
FP
TIMER
MODE
ON
TEMP
TIMER
FAN
OFF
SLEEP
SWING DIRECT
LED FOLLOW
TURBO SEL F
ME
CLEAN
1
Installation instruction,
user guide and warranty
1 ea.
Wireless control
holder with 2 mounting
screws
Batteries (AAA) 2
1
Mounting plate
(shipped attached to the
back of the indoor unit)
Mounting plate securing
screws
Return Air Filters
(Shipped installed in
Plastic screw anchors 5
indoor unit.)
Catalog Numbers
Table 2. Component Catalog Number Cross-Reference
Product Capacity Voltage Lennox Model Number
Wall Mounted (Indoor Unit) 9K 115V MWHA009S4-1L 17K07
Wall Mounted (Indoor Unit) 12K 115V MWHA012S4-1L 17K09
1
5
Catalog
Numbers
Wall Mounted (Indoor Unit) 9K 208-230V MWHA009S4-1P 17K08
Wall Mounted (Indoor Unit) 12K 208-230V MWHA012S4-1P 17K10
Wall Mounted (Indoor Unit) 18K 208-230V MWHA018S4-1P 17K11
Wall Mounted (Indoor Unit) 24K 208-230V MWHA024S4-1P 17K12
Heat Pump (Outdoor Unit) 9K 115V MHA009S4S-1L 17K01
Heat Pump (Outdoor Unit) 12K 115V MHA012S4S-1L 17K03
Heat Pump (Outdoor Unit) 9K 208-230V MHA009S4S-1P 17K02
Heat Pump (Outdoor Unit) 12K 208-230V MHA012S4S-1P 17K04
Heat Pump (Outdoor Unit) 18K 208-230V MHA018S4S-1P 17K05
Heat Pump (Outdoor Unit) 24K 208-230V MHA024S4S-1P 17K06
2
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.
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.
Model Number Identication
OUTDOOR SINGLE ZONE HEAT PUMP UNITS
M H A 009 S 4 S - 1 P
IMPORTANT
All illustrations in this instruction are typical and do
not always represent the exact appearance of the
equipment.
IMPORTANT
The compressor in this unit contains PVE
oil (Polyvinylether). PVE oil is formulated for
hydrouorocarbon (HFC) refrigerants, such as HFC-
410A, which this system contains. While it may have
some miscibility properties with mineral-based oil and
POE oil (Polyolester), it is not recommended to mix PVE
oil with any other type of refrigerant oil.
Series Type
M = Mini-Split
Unit Type
H = Heat Pump
Major Design Sequence
A = First Generation
Nominal Cooling Capacity
009 = 0.75 ton
018 = 1.5 tons
024 = 2 tons
WALL-MOUNTED INDOOR UNITS
Series Type
M = Mini-Split
Unit Type
WH = Wall-Mounted Non-Ducted Unit
012 = 1 ton
Voltage
L = 115V-1 phase-60Hz
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
M WH A 009 S 4 - 1 P
Voltage
L = 115V-1 phase-60Hz
P = 208/230V-1 phase-60Hz
Minor Design Sequence
1 = 1st Revision
Major Design Sequence
A = First Generation
Nominal Cooling Capacity
009 = 0.75 ton
012 = 1 ton
018 = 1.5 tons
024 = 2 tons
Refrigerant Type
4 = HFC-410A
Cooling Efciency
S = Standard Efciency
3
Typical System Components
1
2
3
4
6
7
8
9
10
5
Wall Mounting Plate
Refrigerant Piping
Signal Cable
Wireless Remote Control
Condensate Line
Louver
Wireless Remote Control Holder
Return Air Filters (2)
Front Panel
Outdoor Unit Power Cable
1
2
3
4
5
6
7
8
9
10
ON/OFF
TEMP
FP
TIMER
ON
TIMER
OFF
MODE
FAN/SLC
SLEEP
SWING
DIRECT
TURBO
CLEAN
LED
FOLLOW
19-1/8 (486)
2-3/4
(70)
11-7/8 (302)
21-7/8
(556)
30-3/8 (772)
30-5/8 (778)
2-1/2
(64)
1/2 (13)
1/2
(13)
MHA009S4S
BOTTOM VIEW
FRONT VIEWSIDE VIEW
SIDE VIEW
12-5/8
(322)
11-1/4
(286)
2-3/8 (60)
3-5/8 (92)
DRAIN HOLE (bottom of unit)
11-3/4
(298)
BOTTOM VIEW
FRONT VIEW
SIDE VIEW
SIDE VIEW
MHA012S4S, MHA018S4S
2-3/8 (60)
3/4
(19)
14-3/8
(365)
12-1/4
(311)
13-3/8
(340)
2-3/8 (60)
3-3/8 (86)
21-7/8
(556)
1/2
(13)
20-1/4 (514)
31-1/2 (800)
31-1/2 (815)
13-1/8 (333)
2-3/4
(70)
MHA024S4S
27-5/8
(702)
BOTTOM VIEW
FRONT VIEW
SIDE VIEW
SIDE VIEW
1/2
(13)
14-1/4 (362)
2-3/4
(70)
33-5/8 (854)
21-1/4 (540)
33-1/4 (845)
7-7/8
(200)
1-3/8 (35)
15
(381)
13-1/8
(333)
2-3/8 (60)
3-5/8 (92)
13-3/4
(349)
Figure 3. 12K and 18K Outdoor Unit
Dimensions - Inches (mm)
System Dimensions
Outdoor Units
Figure 1. Typical System Shown
Figure 2. 9K Outdoor Unit
Dimensions - Inches (mm)
Figure 4. 24K Outdoor Unit Dimensions - Inches
(mm)
4
Indoor Units
A
B
C
TOP VIEW
FRONT VIEW
BOTTOM VIEW
SIDE VIEWSIDE VIEW
MHWA024S4
diameter
diameter
Unit Outline
13-1/4 (337)
24 (610)
Air Outlet
Air Inlet
24
(610)
12
(305)
79
(2007)
1
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.
MHWA018S4
6-3/4 (171)
2-1/4
(57)
12-1/2 (318)
5-3/8 (137)
Left Rear Hole
2-1/2 in. (64 mm)
diameter
38 (965)
20-3/8 (518)
5-5/8
(143)
Right Rear Hole
2-1/2 in. (64 mm)
diameter
2-1/4 (57)
Wall-Mount
Unit Outline
2-3/8 (60)
Figure 8. 18K Indoor Unit Wall Plate Dimensions -
Inches (mm)
Figure 5. Indoor Unit Dimensions - Inches (mm)
Size
9K 29-5/8 752 11-3/8 289 8-5/8 219
12K 32-3/4 832 11-3/4 298 8-3/4 222
18K 39-1/8 994 12-1/2 318 9-7/8 251
24K 44 1118 13-1/4 337 10-1/4 260
A B C
in. mm in. mm in. mm
Indoor Unit Wall Mounts
MHWA009S4
11-3/8 (289)
1-7/8
(48)
4
(102)
Left Rear Hole
2-1/2 in. (64 mm)
diameter
28-1/2 (724)
13-3/4 (349)
5-3/8
(136)
Right Rear Hole
2-1/2 in. (64 mm)
diameter
7 (178)
1-1/2 (38)
Wall-Mount
Unit Outline
2 (51)
21-3/4 (553)
11-7/8
(301)
Right Rear Hole
2-1/2 in. (64 mm)
2-1/8 (54)
Wall-Mount
1-7/8 (48)
1-7/8
(48)
8-5/8 (219)
6-7/8 (175)
Left Rear Hole
2-1/2 in. (64 mm)
42-1/2 (1080)
Figure 9. 24K Indoor Unit Wall Plate Dimensions -
Inches (mm)
System Clearances
Outdoor Unit
Figure 6. 9K Indoor Unit Wall Plate Dimensions -
Inches (mm)
MHWA012S4
7-1/2
(191)
11-3/4 (298)
1-3/4
(44)
Figure 7. 12K Indoor Unit Wall Plate Dimensions -
31-5/8 (803)
Inches (mm)
Left Rear Hole
2-1/2 in. (64 mm)
diameter
16-3/4 (425)
9-1/8 (232)
5
(127)
Right Rear Hole
2-1/2 in. (64 mm)
diameter
1-3/4 (44)
1-3/4 (44)
Wall-Mount
Unit Outline
Figure 10. Outdoor Unit Clearances - Inches (mm)
5
Indoor Unit
FRONT VIEW
Wall
Vertical Clearance - Clearance to Floor -
72 inches (1829 mm) Minimum
96 inches (2438 mm) Recommended
5”
(127 mm)
Minimum
6” (152 mm)
Minimum Clearance
Ceiling
Wall
Floor
5”
(127 mm)
Minimum
59”
(1499 mm)
Minimum
SIDE VIEW
Any Object
Multiple Outdoor Units
10 (254)
(Minimum)
(Minimum)
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).
If the height of the wall (C) is greater than the height of the unit (A), the distance from the unit to the wall (B) must be a minimum of 20 inches (508 mm).
Figure 11. Indoor Unit Clearances - Inches (mm)
AIR
FLOW
10 (254)
Unit
Height (A)
AIR
FLOW
60 (1500)
(Minimum)
24 (610)
(Minimum)
Figure 12. Multiple Outdoor Unit Clearances - Inches (mm)
118 (2997)
(Minimum)
Height of
Wall (C)
Unit to
Wall (B)
6
Loading...