Lennox MPA018S4S-1P, MPA024S4S-1P, MPA009S4S-1P, MPA048S4S-1P, MPB009S4S-1P Installation Instructions Manual

©

2016 Lennox Industries Inc.

Dallas, Texas, USA

Table of Contents

General ...........................................................................1

Included Parts.................................................................2

Model Number Identication ...........................................3

Indoor / Outdoor Unit Match-Ups....................................4

Typical System Components ..........................................5

System Dimensions ........................................................6

Outdoor Units................................................................6

Indoor Units ..................................................................7

System Clearances ........................................................9

Outdoor Unit .................................................................9

Indoor Unit ....................................................................9

Torque Requirements for Caps and Fasteners.............10

Indoor Unit Installation ..................................................10

Unit Placement Considerations ..................................10

Installation of Cassette Base ......................................10

Installation of M33 Cassette Cover Panel...................11

Indoor Unit Condensate Piping Connections ..............13

Outdoor Unit Installation ...............................................13

Placement Considerations ..........................................13

Direct Sunlight, Rain, Snow and Ice Protection ..........14

Prevailing Winds .........................................................15

Buried Refrigerant Pipe Protection .............................15

Outdoor Unit Condensate Piping ................................15

Securing the Outdoor Unit ..........................................16

Refrigerant Piping Connections ....................................17

Leak Test and Evacuation ............................................18

Leak Test ....................................................................18

Triple Evacuation Procedure .......................................18

Wiring Connections ......................................................19

Outdoor Unit ..............................................................19

Indoor Unit ..................................................................19

Unit Start-Up .................................................................27

Adding Refrigerant for Longer Line Set ........................27

Troubleshooting ............................................................28

Test Run .......................................................................28

Pre-Checks .................................................................28

Procedure ...................................................................28

Dry Mode Operation (Dehumidication) .......................28

Procedure ...................................................................28

Sequence of Operation ...............................................28

INSTALLATION
INSTRUCTIONS

MLA/MPA/MPB and

M22A/M33A/M33B Series

SINGLE-ZONE MINI-SPLIT SYSTEMS
(208/230V) --
Cassette-Mounted Indoor Unit
507546-06
10/2017
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 Specications 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 M22A, M33A and M33B ceiling cassette indoor units

are matched with an outdoor heat pump unit to create a
mini-split 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

M0STAT60Q-1
Wireless controller

Wireless control
holder with 2
mounting screws

Batteries (AAA) 2

1

1

Installation and owner’s

manual

Paper template for

installation

1 ea.

1

1 - Assembled Outdoor Unit and the following items:

Parts Figure Quantity Parts Figure Quantity

Drain connector 1 Seal ring 1

2

Model Number Identication

CASSETTE NON-DUCTED INDOOR UNITS

M 22 A 012 S 4 - 1 P

Series Type

M = Mini-Split

Unit Type

22 = 2x2 Cassette Non-Ducted Unit
33 = 3x3 Cassette Non-Ducted Unit

Major Design Sequence

A = 1st Generation

B = 2nd Generation

Nominal Cooling Capacity

OUTDOOR HEAT PUMP UNITS

Series Type

M = Mini-Split

009 = .75 tons

012 = 1 tons

018 = 1.5 tons

024 = 2 tons
036 = 3 tons
048 = 4 tons

M P A 009 S 4 S - 1 P

Voltage

P = 208/230V-1 phase-60hz

Minor Design Sequence

1 = 1st Revision
2 = 2nd Revision

Refrigerant Type

4 = HFC-410A

Cooling Efciency

S = Standard Efciency

Voltage

P = 208/230V-1 phase-60hz

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

018 = 1.5 tons

030 = 2.5 tons

012 = 1 tons

024 = 2 tons

036 = 3 tons
048 = 4 tons

Minor Design Sequence

1 = 1st Revision

Refrigerant Circuits

S = Single Circuit

Refrigerant Type

4 = HFC-410A

Cooling Efciency

S = Standard Efciency

3

Indoor / Outdoor Unit Match-Ups

Outdoor Unit Indoor Unit Match-Up Voltage

MPA009S4S-*P M22A009S4-*P 208/230V

MPA012S4S-*P M22A012S4-*P 208/230V

MPA018S4S-*P M22A018S4-*P 208/230V

MPA024S4S-*P M33A024S4-*P 208/230V

MPA036S4S-*P M33A036S4-*P 208/230V

MPA048S4S-*P M33A048S4-*P 208/230V

MPB009S4S-*P M22A009S4-*P 208/230V

MPB012S4S-*P M22A012S4-*P 208/230V

MPB018S4S-*P M22A018S4-*P 208/230V

MPB024S4S-*P M33A024S4-*P 208/230V

MPB036S4S-*P M33A036S4-*P 208/230V

MPB048S4S-*P M33B048S4-*P 208/230V

MLA009S4S-*P M22A009S4-2P 208/230V

MLA012S4S-*P M22A012S4-2P 208/230V

MLA018S4S-*P M22A018S4-2P 208/230V

MLA024S4S-*P M33A024S4-2P 208/230V

4

Typical System Components

I

Indoor unit wiring connections
(under access plate)

Decorative panel

Indoor Unit

MPORTANT - Condensate drain line must always
be located at the bottom of the
bundle.)

Wiring

Condensate drain line

(wrapped in foam insulation)

Refrigerant Line Set, Condensat e Line

And Indoor / Outdoor Cable

(field-provided)

Line set
(wrapped in foam insulation)

Communication cable
036 and 048 only

Tape

Supply Air

Filter

Return Air

Supply Air

Wireless Remote

Control

Outdoor Unit

009-036 shown

Utility

Bundle

Access cover
for valves

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
refrigerant lines individually to
prevent sweating.

208/230V Outdoor Unit

1 2 3 L1 L2

Access cover for power
and control wiring
connections

Condensate drain line
(field-provided)

To Indoor

Unit

Communication Cable

036 and 048 only

TO INDOOR COMM. BUS

NOTEφ

Terminal Block

To Power

LEY WO
L

ARG
Y

S2

S1

XT2

Use 2-conductor
shielded wire

Supply

Liquid and vapor shut off valves

Figure 1. Typical System Shown

5

System Dimensions

A

E

D

B

C

TYPICAL APPEARANCE OF UNITS

Outdoor Units

Table 1. Outdoor Unit Dimensions - Inches (mm)

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 3 11 594

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

6

Indoor Units

DRAIN

CONNECTION

GAS
PIPE

LIQUID

PIPE

SIDE VIEW

10-3/8

(264)

LEFT SIDE VIEW

INSTALLATION

HANGERS

LEVELING

ADJUSTMENT

NUT (4)

CEILING

Fresh Air Intake

(NOTE - Not Used)

AIR

OUTLET

21-1/2 (546)

22-1/2 (572)

BOTTOM VIEW (Body)

DIFFUSER

PANEL

AIR

INLET

23-5/8 (600)

(Ceiling Opening)

SIDE VIEW

20-5/8

(524)

AIR

OUTLET

RIGHT SIDE VIEW

22-1/2

(572)

25-1/2

(648)

Figure 2. M22A Indoor Cassette Unit Dimensions - inches (mm)

25-1/2 (648)

BOTTOM VIEW (Panel)

7

LEFT SIDE VIEW

GAS

PIPE

LIQUID

PIPE

Fresh Air Intake

(NOTE - Not Used)

26-3/4 (679)

30-3/4

(781)

A

33-1/8

(841)

DRAIN

CONNECTION

RIGHT SIDE VIEW

AIR

OUTLET

37-3/8

(949)

33-1/8 (841)

BOTTOM VIEW (Body)

DIFFUSER

PANEL

SIDE VIEW

AIR

INLET

AIR

OUTLET

Size

024 8-1/8 206

036 9-5/8 244

048 11-1/4 286

A

in. mm

Figure 3. M33A and M33B Indoor Cassette Unit Dimensions - inches (mm)

37-3/8 (949)

BOTTOM VIEW (Panel)

8

System Clearances

Outdoor Unit

12

(305)

Indoor Unit

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)

79

(2007)

Air Outlet

36”

(914 mm)

Air Inlet

1

12

(305)

INSTALLATION

HANGERS

LEVELING

ADJUSTMENT

NUT (4)

CEILING

OUTLET

AIR

DIFFUSER

PANEL

AIR

AIR

INLET

23-5/8 (600)

(Ceiling Opening)

OUTLET

Minimum Clearance from Structural Ceiling to Drop Ceiling:

M22A009, M22A012, M22A018, M33A024 -- 10-1/4” (260 mm)

M33A036, M33A048, M33B048 -- 13” (330 mm)

Minimum Clearance to Floor - 98-1/2” (2500 mm)

Figure 5. Indoor Unit Clearances - inches (mm)

36”

(914 mm)

36”

(914 mm)

36”

(914 mm)

9