Lennox MMDA009S4-*P, MPA012S4S-*P, MPA018S4S-*P, MMDA012S4-*P, MPB018S4S-*P Installation Instructions Manual
...
INSTALLATION
©
2018 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 System Components ..........................................4
System Dimensions ........................................................5
Outdoor Units ..............................................................5
Indoor Units .................................................................6
System Clearances ........................................................7
Outdoor Unit ................................................................7
Indoor Unit ...................................................................7
Torque Requirements for Caps and Fasteners...............8
Indoor Unit Installation ....................................................8
Unit Placement Considerations ...................................8
Installation ...................................................................8
Installation Guidelines .................................................9
Field-Relocation of Return Air Filter .............................9
Indoor Unit Condensate Piping Connections .............10
Outdoor Unit Installation ...............................................10
Placement Considerations .........................................11
Direct Sunlight, Rain, Snow and Ice Protection ......... 11
Prevailing Winds ........................................................12
Buried Refrigerant Pipe Protection ............................12
Condensate Piping ....................................................13
Securing the Outdoor Unit .........................................13
Refrigerant Piping Connections ....................................13
Leak Test and Evacuation ............................................16
Leak Test ...................................................................16
Triple Evacuation Procedure......................................16
Wiring Connections ......................................................16
Outdoor Unit .............................................................16
Indoor Unit .................................................................16
Unit Start-Up .................................................................26
Adding Refrigerant for Longer Line Set ........................26
Troubleshooting ............................................................27
Test Run .......................................................................27
Pre-Checks ................................................................27
Procedure ..................................................................27
Dry Mode Operation (Dehumidication) .......................27
Procedure ..................................................................27
Sequence of Operation ..............................................27
INSTRUCTIONS
MLA/MPA/MPB
and MMDA Series
SINGLE-ZONE MINI-SPLIT SYSTEMS
(208/230V) --
Medium-Ducted Indoor Unit
507547-06
1/2018
Supersedes 12/2017
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 MMDA Medium-Static Ducted 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
The assembled indoor unit will include the following items:
Parts Figure Quantity Parts Figure Quantity
M0STAT61Q-1
Wired controller
Wired controller
extension cable
6 ft (2m)
1
1
Installation and owner’s
manual
1 ea.
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
MPA009S4S-*P or MPB009S4S-*P MMDA009S4-*P
MPA012S4S-*P or MPB012S4S-*P MMDA012S4-*P
MPA018S4S-*P or MPB018S4S-*P MMDA018S4-*P
MPA024S4S-*P or MPB024S4S-*P MMDA024S4-*P
MPA036S4S-*P or MPB036S4S-*P MMDA036S4-*P
MPA048S4S-*P or MPB048S4S-*P MMDA048S4-*P
208/230V
208/230V
208/230V
208/230V
208/230V
208/230V
MLA009S4S-*P MMDA009S4-2P
MLA012S4S-*P MMDA012S4-2P
MLA018S4S-*P MMDA018S4-2P
MLA024S4S-*P MMDA024S4-2P
208/230V
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
009 = 0.75 tons
012 = 1 tons
018 = 1.5 tons
024 = 2 tons
036 = 3 tons
048 = 4 tons
MEDIUM-STATIC DUCTED INDOOR UNITS
M MD A 012 S 4 - 1 P
Series Type
M = Mini-Split
Unit Type
MD = Medium-Static Ducted Unit
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
Minor Design Sequence
1 = 1st Revision
2 = 2nd Revision
Major Design Sequence
A = 1st Generation
B = 2nd Generation
Nominal Cooling Capacity
009 = .75 tons
012 = 1 tons
018 = 1.5 tons
024 = 2 tons
036 = 3 tons
048 = 4 tons
Refrigerant Type
4 = HFC-410A
Cooling Efciency
S = Standard Efciency
3
Typical System Components
IMPORTANT - Condensate drain line must always
Indoor Unit
Supply Air
Opening
be located at the bottom of the
bundle.)
Indoor unit wiring connections
(under access plate)
Wiring
Condensate drain line
(wrapped in foam insulation)
Refrigerant Line Set, Condensate Line
And Indoor / Outdoor Cable
UV-rated tape (field-provided)
Line set
(wrapped in foam insulation)
Communication cable
036 and 048 only
Tape
(field-provided)
Filter
Return Air
Liquid and vapor shut off valves
Wired Remote
Control
Outdoor Unit
009-036 shown
Utility
Bundle
Access cover
for valves
IMPORTANT - The refrigerant
metering device for this system is
located in the outdoor unit. This
makes it necessary to insulate the
refrigerant lines individually to
prevent sweating.
208/230V Outdoor Unit
Terminal Block
1 2 3 L1 L2
To Indoor
Condensate drain
from indoor unit
Unit
Communication Cable
036 and 048 only
XT2
TO INDOOR COMM. BUS
NOTEφ
To Power
Supply
LLEY
ARG Y
WO
S2
S1
Use 2-conductor
shielded wire
Figure 1. Typical System Shown
4
System Dimensions
A
E
D
B
C
TYPICAL APPEARANCE OF UNITS
Outdoor Units
Model
MPA009S4S-*P
MPA012S4S-*P
MPA018S4S-*P
MPA024S4S-*P
MPA036S4S-*P
MPA048S4S-*P
MPB009S4S-*P
MPB012S4S-*P
MPB018S4S-*P
MPB024S4S-*P
MPB036S4S-*P
MPB048S4S-*P
Unit of
Measurement
inches 33-1/4 21-5/8 22 11-3/8 12-3/4
mm 845 549 559 289 324
inches 36-1/8 22 27-1/2 12-3/4 13
mm 918 559 699 324 330
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 33-1/8 19-1/8 21-7/8 11-7/8 11-3/4
mm 842 486 556 302 298
inches 34-1/4 20-1/4 21-7/8 13-1/8 13-3/8
mm 870 514 556 333 340
inches 36 21-1/4 27-5/8 14-1/4 13-3/4
mm 914 540 702 362 349
inches 37-1/4 26-1/2 31-7/8 16-3/8 15-7/8
mm 1032 673 810 416 403
inches 41-1/8 25 52-1/2 16-3/8 15-7/8
mm 1045 635 1334 416 403
A B C D E
MLA009S4S-*P
MLA012S4S-*P
MLA018S4S-*P
MLA024S4S-*P
inches 34-1/4 20-1/4 21-3/4 12-1/4 13-3/8
mm 870 514 552 311 594
inches 36 21-1/4 27-5/8 13-3/4 16
mm 914 540 702 349 406
inches 40-3/4 26-1/2 31-7/8 15-1/8 16
mm 1035 673 810 384 406
Figure 2. Outdoor Unit Dimensions - inches (mm)
5
Indoor Units
FRESH AIR INTAKE
3-5/8 (92) Diameter (015 thru 018)
5 (127) Diameter (024 thru 048)
SIDE VIEW
MOUNTING
LUGS (4)
D
C
CONDENSATE
GRAVITY
DRAIN
MOUNTING
LUGS (4)
P
1 (25) 1 (25)
N
TOP VIEW
H
I
J
F
M
SUPPLY AIR
OPENING
G
A
E
FRONT VIEW
OPTIONAL BOTTON
RETURN AIR OPENING
BOTTOM VIEW
3/4 (19)3/4 (19)
ELECTRICAL
CONTROL
P
B
CONDENSATE
PUMP DRAIN
GRAVITY
CONDENSATE
DRAIN
AIR FILTER
ELECTRICAL
CONTROL
BOX
LIQUID
PIPE
BOX
GAS
PIPE
Size
RETURN AIR
OPENING
K
REAR VIEW
A B C D E F G H
in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm
L
AIR FILTER
009 thru 012 27-5/8 702 8-1/4 210 25 635 22-1/2 572 31-1/8 791 2-5/8 67 19-1/2 495 1-3/8 35
018 36-1/4 921 8-1/4 210 25 635 22-1/2 572 39-3/4 1010 2-5/8 67 28 711 1-3/8 35
024 36-1/4 921 10-5/8 270 25 635 22-1/2 572 39-3/4 1010 2-5/8 67 28 711 1-3/8 35
036 44-7/8 1140 10-5/8 270 30-1/2 775 28 711 48-1/2 1232 2-5/8 67 36-3/4 933 1-3/8 35
048 47-1/4 1200 11-7/8 302 34-1/8 867 31-1/2 800 50-3/4 1289 3-1/8 79 38-1/8 968 1-1/2 38
Size
J K L M N P
in. mm in. mm in. mm in. mm in. mm in. mm
009 thru 012 4-5/8 117 23-1/2 597 7-7/8 200 3-1/8 79 29-1/8 740 13-3/4 349
018 4-5/8 117 32 813 7-7/8 200 3-1/8 79 37-3/4 959 13-3/4 349
024 7 178 32 813 10-1/4 260 3/4 19 37-3/4 959 13-3/4 349
036 7 178 40-3/4 1035 10-1/4 260 3/4 19 46-1/2 1181 19-1/4 489
048 8 203 43 1092 11-3/8 289 1-3/4 44 48-7/8 1241 19-5/8 498
Figure 3. MMDA Indoor Ducted Unit Dimensions - Inches (mm)
6
System Clearances
Outdoor Unit
Indoor Unit
12
(305)
24 (610)
24
(610)
1
Minimum rear clearance can be 6 inches (152 mm) when mounted on brackets
and with no obstructions on the other three sides.
Figure 4. Outdoor Unit Clearances - Inches (mm)
Wall
20” (508 mm) Minimum Service Clearance
79
(2007)
Air Outlet
Air Inlet
1
12
(305)
Wall
Air
DUCTED
UNIT
Flow
24” (610 mm)
Minimum
Service
Clearance
TOP VIEW
Ceiling
1” (25 mm) Minimum Clearance
1” (25 mm) Minimum Clearance
FRONT VIEW
CeilingSuspended
24” (610 mm)
Minimum
Service
Clearance
Figure 5. Indoor Unit Clearances - Inches (mm)
7
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*m) 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
• Areas exposed to salt or other corrosive materials or
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
Installation
1. Make sure that the structural ceiling or slab is able
to support the weight of the indoor unit. It may be
necessary to add extra support.
2. Install suspension rods in the structural
ceiling or concrete slab in a suitable location.
If the structural ceiling is constructed of concrete, install
anchors to accept four ⅜” threaded rods to suspend
the indoor unit. If the structural ceiling includes
wooden joists, use angle iron or Unistrut channel xed
securely in place to accept the ⅜” threaded rods.
NOTE: Threaded rod is the ONLY acceptable method of
suspending the unit; do not use chains or straps.
See “Figure 6. Suspending Methods”.
⅜” THREADED
CONCRETE CEILING
USING ANCHORS
ANCHOR
ANGLE IRON
BOLTED IN
PLACE ACROSS
WOODEN JOISTS
⅜” THREADED
ROD
ANGLE IRON
WOODEN JOISTS
WOODEN JOIST
ROD
ACROSS
Figure 6. Suspending Methods
3. Slide one nut and one washer onto each threaded rod.
Use electrical tape to keep the washer from failing
off. Position the nuts slightly above the nal resting
place of the four suspension brackets. See”Figure 7.
Suspending Hardware”
8
4. Use either a mechanical lifting device or a minimum of
INDOOR UNIT
LEVELING
NUT
⅜” THREADED
ROD
SUSPENSION
BRACKET
SUPPLY AIR
OPENING
FRONT VIEW
When unit is
level, tighten
nut to secure
position of
suspension
bracket on
rod.
Remove the return air filter from its existing location at
the rear of the unit.
Remove the screws that secure the filter frame to the
rear of the unit and set the frame aside.
Remove the screws that secure the return air cover
plate to the bottom of the unit. Set the cover plate aside.
e
Side rail
Dentilation panel
1
2
RETURN AIR
FILTER FRAME
RETURN AIR
COVER PLATE
Re-install the return air filter in the repositioned filter
frame in the bottom of the unit. Refer to the arrows in the
illustration below.
two people to raise the unit and insert the threaded rods
into the suspension brackets on the unit chassis. Slide
a washer and then a nut onto each rod below each
suspension bracket. Use the leveling nut (beneath
suspension bracket) 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. This
will ensure that the unit remains level.
Figure 7. Suspending Hardware
5. If necessary, install a eld-provided isolation grommet
as shown in “Figure 8. Isolation Grommet” to prevent
transmission of vibration from unit to structural ceiling.
6. If the unit is being installed in an application that includes
a sheet rock (plasterboard) ceiling, it is required that
an access panel be installed in a suitable location.
This will also allow access for future maintenance.
Access is required during the start up process to test
the condensate disposal system. See “Figure 13.
Condensate Drain Test” on page 10.
7. The unit is factory-congured for the supply air to be
delivered from the front and the return air lter at the
rear of the unit. The return air lter location can be
relocated in the eld for bottom return air lter access,
if more convenient. See “Figure 8. Isolation Grommet”.
• Use exible joints (canvas) at the point where the duct
connects to the unit on both ends. Material must meet
all local and national code requirements
• When unit is being installed in a location where even
the slightest noise would be a problem (meeting room
or other very quiet space), design duct system to avoid
transmission of vibration to the structure to the extent
possible
• Follow ACCA manual D guidelines for return air l-
ter grille sizing. The return air lter grille should have
a minimum surface area of 200 square inch per ton
(1290 cm2 per 3.5kW)
Field-Relocation of Return Air Filter
Depending on installation requirements, the return air lter
may need to be relocated as a bottom return air. See
“Figure 9. Field-Relocation of Return Air Filter (Typical) -
Bottom Return Air” on page 9 for eld-relocating the
return air lter.
⅜” THREADED
ROD
FIELD-PROVIDED
ISOLATION GROMMET
WASHER
LEVELING
NUT
Figure 8. Isolation Grommet
NOTE: No part of the suspended ceiling, or other supports
not directly associated with the indoor unit
installation, can be xed to, or touch the indoor
Installation Guidelines
• Provide separate support for the weight of the duct
unit, in any form. Minimum clearances must be
observed at all times.
system. Duct system must not be supported by the
indoor unit
SUSPENSION
BRACKET
Figure 9. Field-Relocation of Return Air Filter
(Typical) - Bottom Return Air
9
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