Seabreeze MZ18H424ZMO User manual

950-0289revB July 22, 2022
24 SERIES MINI-SPLIT
DUAL / TRIPLE / QUAD ZONE / FIVE PORT
INSTALLATION MANUAL
MZ18H424ZMO Condenser
MZ27H424ZMO Condenser
MZ36H424ZMO Condenser
MZ48H424ZMO Condenser
HMZ18H424ZMO Condenser
HMZ28H424ZMO Condenser
HMZ36H424ZMO Condenser
HMZ48H424ZMO Condenser
WM6H424ZMI Evaporator
WM9H424ZMI Evaporator
WM12H424ZMI Evaporator
WM18H424ZMI Evaporator
WM24H424ZMI Evaporator
30H421ZMI Evaporator
36H421ZMI Evaporator

950-0289revB - 1 - July 22, 2022
CONTENTS
INSTALLATION STEPS.........................................................................................................................................2
NOTES TO INSTALLER.........................................................................................................................................2
PARTS INCLUDED WITH UNIT.............................................................................................................................3
INSTALLER SUPPLIED PARTS............................................................................................................................3
Decorative Channel.......................................................................................................................4
Wall Bracket...................................................................................................................................4
INSTALLATION CONSIDERATIONS .................................................................................................................... 4
General Information ......................................................................................................................4
System Configuration Options.....................................................................................................5
Selecting locations for the Indoor unit (Wall-mounted) ...........................................................7
Selecting location for Outdoor unit .............................................................................................7
Line set length................................................................................................................................8
INDOOR UNIT (EVAPORATOR) INSTALLATION ................................................................................................ 9
OUTDOOR UNIT (CONDENSER) INSTALLATION.............................................................................................11
Maximum Line length and height..............................................................................................13
CONNECTING LINE SET ....................................................................................................................................14
ELECTRICAL CONNECTION..............................................................................................................................16
Connect the Cable to the Outdoor Unit....................................................................................16
TYPICAL ELECTRICAL WIRING CONNECTIONS.............................................................................................17
Electrical connection of the indoor unit (Wall-mounted)........................................................18
TYPICAL OUTDOOR INSTALLATION ................................................................................................................19
TUBING CONNECTION.......................................................................................................................................20
System structure..........................................................................................................................20
Tubing Connection Size.............................................................................................................20
EVACUATION OF THE REFRIGERATION TUBES AND INDOOR UNIT...........................................................21
Leak Testing.................................................................................................................................21
Vacuum Purge.............................................................................................................................21
START UP TESTING...........................................................................................................................................23
Preparation...................................................................................................................................23
Operational Test..........................................................................................................................23
Technical Specifications for DUAL ZONE Outdoor Unit ......................................................................................24
Technical Specifications for TRIPLE ZONE Outdoor Unit ...................................................................................25
Technical Specifications for QUAD ZONE Outdoor Unit......................................................................................26
Technical Specifications for FIVE PORT Outdoor Unit........................................................................................27
Technical Specifications for DUAL ZONE PEAK HEAT Outdoor Unit.................................................................28
Technical Specifications for TRIPLE ZONE PEAK HEAT Outdoor Unit..............................................................29
Technical Specifications for QUAD ZONE MAX HEAT Outdoor Unit..................................................................30
Technical Specifications for FIVE PORT PEAK HEAT Outdoor Unit...................................................................31
Technical Specifications for WALL MOUNTED Indoor Units...............................................................................32
TROUBLESHOOTING .........................................................................................................................................34
INDOOR UNIT ERROR CODES..........................................................................................................................35
TERMINAL READINGS ON INDOOR UNIT ........................................................................................................36
OUTDOOR ELECTRICAL SCHEMATICS...........................................................................................................36
ERROR CODES ON OUTDOOR PC BOARD.....................................................................................................40
WARRANTY.........................................................................................................................................................41
Do not dispose this product as unsorted municipal waste. Collection of such waste for special
treatment is necessary.

950-0289revB - 2 - July 22, 2022
INSTALLATION STEPS
•Select the location for the indoor unit. (Page 7)
•Mount the indoor wall brackets. (Page 9)
•Drill wall penetration holes. (Page 9)
•Hang the indoor units. (Page 10)
•Locate and mount the outdoor unit. (Page 12)
•Connect and route line set. (Page 14–15)
•Connect the wiring from the indoor unit to the outdoor unit. (Page 16–18)
•Leak test & Evacuate unit. (Page 21-22)
•Operational Test of system. (Page 23)
NOTES TO INSTALLER
This manual is to aid the qualified HVAC contractor in the installation of this Mini Split system.
Report all shipping damage to the carrier IMMEDIATELY. Check units and box exterior for damage.
Please read and understand these instructions prior to installing the unit, failure to comply with these
instructions may result in improper installation, operation and maintenance, possibly resulting in fire, electrical
shock, property damage, personal injury or death.
CAUTION! Do not use old refrigerant lines with new installation:
For connecting pipes use new and clean piping materials with high pressure fittings made for R410A only. This
air conditioner utilizes the HFC refrigerant (R410A) which does not destroy ozone layer. R410A refrigerant
operates at approximately 1.6 times the pressure of refrigerant R22. Accompanied with the adoption of the new
refrigerant, the refrigeration lubricating oil has also been changed. During installation work be sure that water,
dust, former refrigerant, or refrigeration lubricating oil does not enter into the new type refrigerant R410A air
conditioner system. The system must not be left open to the atmosphere for any reason for any period of time
as the systems oil quickly absorbs moisture and will contaminate and damage the system. To prevent mixing of
refrigerant or refrigeration lubricating oil, the sizes of connecting sections of charging port on main unit and
installation tools are different from those used for the conventional refrigerant units. Accordingly, special tools
are required for the new refrigerant (R410A) units. For connecting pipes use new and clean piping materials
with high pressure fittings made for R410A only. The best and recommended solution is not to use the existing
line sets because there may be some problems with pressure fittings and possible impurities in the existing
piping.
When installing this unit, an electrical surge suppressor is recommended.
Installers please pass this manual and warranty registration to end user. If technical assistance is required
during installation or start up, please call 215-750-9876 (M-F 8:00 am to 4:30 pm ET) to speak to a Technical
Service Engineer. Before calling please have the Model and Serial numbers available.
Safety Instructions:
1. Carefully read all instructions prior to installation.
2. Check Rating Plate for correct system voltage before installing the unit. Installing and operating a
unit with the incorrect voltage may result in malfunction or other issues and will void the warranty.
3. Units must be connected to a correctly grounded electrical supply.
4. Do not use the units if they have been dropped or otherwise damaged or installed incorrectly.
The manufacturer of the unit will not be liable for any damages caused by failure to comply with the installation
and operating instructions in this manual.
The unit rating plate contains pertinent information for unit operation; please refer to it as required.
Inspect all parts for damage prior to installation and start up. Units must be installed by a qualified HVAC
contractor.

950-0289revB - 3 - July 22, 2022
PARTS INCLUDED WITH UNIT
Wall-mounted Indoor unit
Outdoor Unit
Wall Bracket
Drain Fitting & Gasket
Remote Control
Installation Manual
Batteries for Remote Control (2 AAA)
Terminal Label
Remote Control Holder
Adapter: 3/8"F to 1/2”M (951-0569) - 2 pcs for 18K
3/8"F to 1/2”M (951-0569) - 3 pcs for 27/28K
Wi-Fi kit
Manual
Adapter: 3/8"F to 1/2”M (951-0569) - 3 pcs (36K/48K)
1/2"F to 3/8”M (951-0570) - 1 pc (36K), - 2 pcs (48K)
1/4"F to 3/8”M (951-0571) - 1 pc (36K), - 2 pcs (48K)
1/2"F to 5/8”M (951-0572) - 1 pc (36K), - 2 pcs (48K)
Operation Manual
Cord Protection Rubber
Drain Tubing 6 ft.
Note: The outdoor unit can also be connected to different types of indoor units as followings:
Console: 12K –C12H424ZMI
Cassette: 9K –CA9H424ZMI, 12K - CA12H424ZMI, 18K - CA18H424ZMI, 24K - CA24H424ZMI
Floor / Ceiling: 18K - FC18H424ZMI, 24K - FC24H424ZMI.
Ducted: 9K - D9H424ZMI; 12K - D12H424ZIGX, 18K - D18H424ZMI, 24K –D24H424ZMI.
Air Handler: 24K –AH24H424ZMI
For the detail information about the included parts and connecting for above indoor units, please refer to the
manual to be included with each indoor unit.
INSTALLER SUPPLIED PARTS
The following additional Items are required for proper installation.
•Refrigerant line set: Insulated copper tubing:
o6K Indoor –1/4” (liquid line) and 3/8” (suction line).
o9K Indoor –1/4” (liquid line) and 3/8” (suction line).
o12K Indoor –1/4” (liquid line) and 1/2” (suction line)
o18K Indoor –1/4” (liquid line) and 1/2” (suction line).
o24K Indoor –3/8” (liquid line) and 5/8” (suction line).
o30K Indoor –3/8” (liquid line) and 5/8” (suction line).
o36K Indoor –3/8” (liquid line) and 5/8” (suction line).
Flare nuts 2 ea. required per line, see above (line set) for size.
•Vinyl UV resistant tape.
•Supply Power:
Dual Zone MZ18H424ZMO / HMZ18H424ZMO
o25 amp circuit breaker
Triple Zone MZ27H424ZMO / HMZ28H424ZMO
o30 amp circuit breaker / 40 amp circuit breaker
Quad Zone MZ36H424ZMO / HMZ36H424ZMO
o40 amp circuit breaker / 60 amp circuit breaker
Five Port MZ48H424ZMO / HMZ48H424ZMO
o60 amp circuit breaker / 60 amp circuit breaker
•Interconnect wire cable for all units
o4C 14 AWG stranded (Recommended) 16 AWG stranded 4C (min)per indoor unit.
•Refrigerant - R410A required for additional line set charge.
•Sealing putty.
•1/4” to 5/16” access fitting adaptor (PN: QC-S5)
•Mounting hardware - Wall anchors, condenser pad etc.
•Surge protector (highly recommended)

950-0289revB - 4 - July 22, 2022
Note: Condensate pump can be powered by connecting to the incoming power at the indoor OR outdoor
terminal block.
Main system breaker or disconnect sized per unit requirements should be mounted adjacent to outdoor unit.
Decorative Channel
Route the bundled piping and wiring to the outdoor unit and connect per the OUTDOOR UNIT installation
instructions. IRP’s Plastic-Duct piping and wiring duct work provides a convenient and professional looking
system to route and protect the pipes and wires. Please see the illustrations below:
Wall Bracket
The outdoor unit may be mounted using a wall bracket (optional) (Our Catalog # BR-440L for up to 440 lbs) or
located in a freestanding position on the floor or pad (preferably slightly elevated).
INSTALLATION CONSIDERATIONS
General Information
Application
Check the application of the unit prior to installation. Certain applications require additional components or
installation parameters.
The below data is for the Northeast section of the US. Increase capacity by 25% for the East, 30% for
the South and 40% for the West.
Computer or Data Server Rooms
These require approximately 12,000 BTU/H capacities per 250 ft²of room size (Based on 8’ ceiling height). Low
ambient controller included.
Offices and Commercial Spaces, Churches etc.
These require approximately 12,000 BTU/H capacity per 400 ft²of room size (Based on 8’ ceiling height).
Residential, Bedrooms, Family Rooms etc.
These require approximately 12,000 BTU/H capacity per 600 ft²of room size (Based on 8’ ceiling height).
Note: This system does not contain a back-up heat source and is NOT recommended as a primary
source of heat.

950-0289revB - 5 - July 22, 2022
System Configuration Options
Dual Zone
MZ18H424ZMO / HMZ18H424ZMO (2 indoor units)
Note: Do not mismatch or connect to an outdoor unit other than the designed matched system.
Note: The system matches are not recommended if all indoor units require simultaneous continuous
full duty above 22000 Btu.
Triple Zone
MZ27H424ZMO / HMZ28H424ZMO (2 to 3 indoor units)
Note: 1. Do not mismatch or connect to an outdoor unit other than the designed matched system.
2. This system must be used with a minimum of two indoor units (evaporators).
Note: The system matches are not recommended if all indoor units require simultaneous continuous
full duty above 30000 Btu.
Quad Zone
MZ36H424ZMO / HMZ36H424ZMO (2 to 4 indoor units)
Note: 1. Do not mismatch or connect to an outdoor unit other than the designed matched system.
2. This system must be used with a minimum of two indoor units (evaporators).
Note: The system matches are not recommended if all indoor units require simultaneous continuous
full duty above 40000 Btu.
TWO INDOOR UNITS
6K + 6K / 6K + 9K / 6K + 12K / 9K + 9K / 9K + 12K
2 INDOOR UNITS
3 INDOOR UNITS
6K + 18K / 9K + 12K / 9K + 18K
12K + 12K / 12K + 18K
6K + 6K +6K / 6K +6K + 9K / 6K + 6K +12K / 6K + 6K + 18K
6K + 9K + 9K / 6K +9K + 12K / 6K + 9K +18K / 6K + 12K + 12K
9K + 9K + 9K / 9K + 9K + 12K / 9K + 12K + 12K
2 INDOOR UNITS
3 INDOOR UNITS
4 INDOOR UNITS
6K + 24K / 9K + 24K
12K + 18K / 12K + 24K
18K + 18K / 18K + 24K*
6K + 6K + 18K
6K + 9K + 18K
6K + 12K + 12K
6K + 12K + 18K
6K + 12K + 24K
6K + 18K + 18K
9K + 9K + 12K
9K + 9K + 18K
9K + 9K + 24K
9K + 12K + 12K
9K + 12K + 18K
9K + 12K + 24K
12K + 12K + 12K
12K + 12K + 18K
6K + 6K + 6K + 6K / 6K + 6K + 6K + 9K
6K + 6K + 6K + 12K / 6K + 6K + 6K + 18K
6K + 6K + 6K + 24K / 6K + 6K + 9K + 9K
6K + 6K + 9K + 12K / 6K + 9K + 9K + 18K
6K + 6K + 9K + 24K / 6K + 6K + 12K + 12K
6K + 6K + 12K + 18K / 6K + 9K + 9K + 9K
6K + 9K + 9K + 12K / 6K + 9K + 9K + 18K
6K + 9K + 12K + 12K / 6K + 9K + 12K + 18K
6K + 12K + 12K + 12K / 9K + 9K + 9K + 9K
9K + 9K + 9K + 12K / 9K + 9K + 9K + 18K
9K + 9K + 12K + 12K / 9K + 12K + 12K + 12K
Note：The combinations with * are not available when an air handler is connected.

950-0289revB - 6 - July 22, 2022
MZ48H424ZMO / HMZ48H424ZMO (2 to 5 indoor units)
Note: 1. Do not mismatch or connect to an outdoor unit other than the designed matched system.
2. This system must be used with a minimum of two indoor units (evaporators).
Note: The system matches are not recommended if all indoor units require simultaneous continuous
full duty above 50000 Btu.
2 INDOOR UNITS
3 INDOOR UNITS
4 INDOOR UNITS
5 INDOOR UNITS
6K + 30K
6K + 36K
9K + 30K
9K + 36K
12K + 30K
12K + 36K
18K + 24K*
18K + 30K
18K + 36K
24K + 24K*
24K + 36K*
30K + 30K
6K + 6K + 30K
6K + 6K + 36K
6K + 9K + 24K
6K + 9K + 30K
6K + 9K + 36K
6K + 12K + 24K
6K + 12K + 30K
6K + 12K + 36K
6K + 18K + 18K
6K + 18K + 24K*
6K + 18 + 30K
6K + 18K + 36K
6K + 24K + 24K*
6K + 24K + 30K
9K + 9K + 24K
9K + 9K + 30K
9K + 9K + 36K
9K + 12K + 18K
9K + 12K + 24K
9K + 12K + 30K
9K + 12K + 36K
9K + 18K + 18K
9K + 18K + 24K*
9K + 18K + 30K
9K + 24K + 24K*
12K + 12K + 18K
12K + 12K + 24K
12K + 12K + 30K
12K + 12K + 36K
12K + 18K + 18K
12K + 18K + 24K*
12K + 18K + 30K
12K + 24K + 24K*
18K + 18K + 18K
18K + 18K + 24K*
6K + 6K + 6K + 24K
6K + 6K + 6K + 30K
6K + 6K + 6K + 36K
6K + 6K + 9K + 18K
6K + 6K + 9K + 24K
6K + 6K + 9K + 30K
6K + 6K + 12K + 18K
6K + 6K + 12K + 24K
6K + 6K + 12K + 30K
6K + 6K + 12K + 36K
6K + 9K + 9K + 18K
6K + 9K + 9K + 24K
6K + 9K + 9K + 30K
6K + 9K + 9K + 36K
6K + 9K + 12K + 12K
6K + 9K + 12K + 18K
6K + 9K + 12K + 24K
6K + 9K + 12K + 30K
6K + 12K + 12K + 12K
6K + 12K + 12K + 18K
6K + 12K + 12K + 24K
6K + 12K + 12K + 30K
6K + 6K + 18K + 18K
6K + 6K + 18K+ 24K*
6K + 6K + 18K + 30K
6K + 6K + 24K + 24K*
6K + 9K + 18K + 18K
6K + 9K + 18K + 24K*
6K + 12K + 18K + 18K
6K + 12K + 18K + 24K*
9K + 9K + 9K + 12K
9K + 9K + 9K + 18K
9K + 9K + 9K + 24K
9K + 9K + 9K + 30K
9K + 9K + 9K + 36K
9K + 9K + 12K + 12K
9K + 9K + 12K + 18K
9K + 9K + 12K + 24K
9K + 9K + 12K + 30K
9K + 12K + 12K + 18K
9K + 12K + 12K + 24K
9K + 9K + 18K + 18K
9K + 9K + 18K + 24K*
9K + 12K + 18K +18K
12K + 12K + 12K + 12K
12K + 12K + 12K + 18K
12K + 12K + 12K + 24K
12K + 12K + 18K + 18K
6K + 6K + 6K + 6K + 9K
6K + 6K + 6K + 6K + 12K
6K + 6K + 6K + 6K + 18K
6K + 6K + 6K + 6K + 24K
6K + 6K + 6K + 6K + 30K
6K + 6K + 6K + 6K + 36K
6K + 6K + 6K + 9K + 9K
6K + 6K + 6K + 9K + 12K
6K + 6K + 6K + 9K + 18K
6K + 6K + 6K + 12K +12K
6K + 6K + 6K + 12K + 18K
6K + 6K + 6K + 12K + 24K
6K + 6K + 6K + 9K + 30K
6K + 6K + 6K + 9K + 36K
6K + 6K + 6K + 12K + 30K
6K + 6K + 6K + 18K + 18K
6K + 6K + 6K + 18K + 24K*
6K + 6K + 9K + 9K + 9K
6K + 6K + 9K + 9K + 12K
6K + 6K + 9K + 9K + 18K
6K + 6K + 9K + 9K + 24K
6K + 6K + 9K + 12K + 12K
6K + 6K + 9K + 12K + 18K
6K + 6K + 9K + 12K +24K
6K + 6K + 9K + 18K + 18K*
6K + 6K + 9K + 18K + 24K*
6K + 6K + 12K + 12K +12K
6K + 6K + 12K + 12K +18K
6K + 6K + 12K + 12K + 24K
6K + 6K + 12K + 18K + 18K*
6K + 9K + 9K + 9K +9K
6K + 9K + 9K + 9K +12K
6K + 9K + 9K + 9K + 18K
6K + 9K + 9K + 9K + 24K
6K + 9K + 9K + 12K + 12K
6K + 9K + 9K + 12K + 18K
6K + 9K + 9K + 12K + 24K
6K + 9K + 9K + 18K + 18K*
6K + 9K + 12K + 12K + 12K
6K + 9K + 12K + 12K +18K
6K + 12K + 12K + 12K + 12K
6K + 12K + 12K + 12K + 18K
9K + 9K + 9K + 9K + 9K
9K + 9K + 9K + 9K + 12K
9K + 9K + 9K + 9K + 18K
9K + 9K + 9K + 9K + 24K
9K + 9K + 9K + 12K + 12K
9K + 9K + 9K +12K + 18K
9K + 9K + 12K + 12K + 12K
9K + 9K + 12K + 12K + 18K
9K + 12K + 12K + 12K + 12K
12K + 12K + 12K + 12K + 12K
1. Only one Air Handler indoor unit can be connected for all combinations.
2. The combinations with * are not available when an air handler is connected.
3. When connecting 30K/36K models, additional 17.64 oz. (500g) refrigerant is needed.

950-0289revB - 7 - July 22, 2022
Indoor Models Available:
Indoor Unit Type
Catalog Number
Outline
Remark
Wall-mounted Indoor Unit
WM6H424ZMI
WM9H424ZMI
WM12H424ZMI
WM18H424ZMI
WM24H424ZMI
30H421ZIMI
36H421ZIMI
Console Indoor Unit
C12H424ZMI
For the detail information about
connecting, please refer to the
specific manual included with
each indoor unit.
Cassette Indoor Unit
CA9H424ZMI
CA12H424ZMI
CA18H424ZMI
CA24H424ZMI
Floor / Ceiling Indoor Unit
FC18H424ZMI
FC24H424ZMI
Ducted Indoor Unit
D9H424ZMI
D12H424ZMIGX
D18H424ZIMGX
D24H424ZIMGX
Air Handler
AH24H424ZMI
Selecting locations for the Indoor unit (Wall-mounted)
1. Determine the best location for mounting the
Indoor unit. Ensure the dimensions requirement
indicated be the arrows are followed.
2. Paying close attention to the air circulation in
the room, these units throw air approximately
15ft. Ensure that no obstacles impede airflow.
3. Do not mount this unit close to a heat source or
a doorway.
Note：For the detailed information about other types of
indoor units, please refer to the manual to be included with
each indoor unit.
Selecting location for Outdoor unit
1. Determine the best location for mounting the outdoor unit. Ensure the dimension requirements
indicated by the arrows are followed.
2. Do not mount this unit close to combustibles or heat sources.
3. Although this unit is fairly quiet when in operation, do not mount where noise issues could be a
problem.
Spacetotheobstruction
More than 5"
Space to the wall
More than 5"
Space to the wall
Space to the ceiling
More than 6"
Space to the floor
More than 8.2 ft.
Morethan9.8ft.

950-0289revB - 8 - July 22, 2022
Line set length
Locate the Indoor and Outdoor units as close together as possible. Line set height and length cannot exceed
specifications.
Installation Notes:
DUAL ZONE –MZ18H424ZMO
1. The maximum total line set length must not exceed 131 feet for all units attached to the 18K condenser.
Refrigerant must be added (0.161 oz./ft.) when line set total length exceeds 49.2 ft.
2. Dual Zone model MZ18H424ZMO is designed to operate with 2 indoor units.
3. The Dual Zone maximum length is 82 ft. for one indoor unit.
TRIPLE ZONE –MZ27H424ZMO / HMZ28H424ZMO
1. The maximum total line set length must not exceed 197 feet for all units using the 27K/28K condenser.
Refrigerant must be added (0.161 oz./ft.) when line set length exceeds 74 ft. total.
2. TRIPLE ZONE model MZ27H424ZMO / HMZ28H424ZMO are designed to operate two to three indoor units.
DO NOT use this system with one indoor unit.
3. The TRIPLE Zone maximum length is 98 ft. for one indoor unit.
QUAD ZONE –MZ36H424ZMO / HMZ36H424ZMO
1. The maximum total line set length must not exceed 262 feet for all units using the 36K condenser.
Refrigerant must be added (0.161 oz./ft.) when line set length exceeds 98 ft. total.
2. Quad Zone model MZ36H424ZMO / HMZ36H424ZMO are designed to operate two to four indoor units. DO
NOT use this system with one indoor unit.
3. The Quad Zone maximum length is 115 ft. for one indoor unit.
FIVE PORT –MZ48H424ZMO
1. The maximum total line set length must not exceed 262 feet for all units using the 48K condenser.
Refrigerant must be added (0.161 oz./ft.) when line set length exceeds 131.2 ft. total.
2. Five Port model MZ48H424ZMO is designed to operate two to five indoor units. DO NOT use this
system with one indoor unit.
3. The Five Port maximum length is 115 ft. for one indoor unit.
NOTE: An oil trap is recommended if the indoor unit is over 15 feet in height from the outdoor unit.

950-0289revB - 9 - July 22, 2022
INDOOR UNIT (EVAPORATOR) INSTALLATION
1. Clearances and Mounting requirements (Wall-mounted Indoor Unit)
Enough space should be left around the unit to facilitate maintenance. Please view Figure. 1 for recommended
dimensions:
(Rear piping hole)
Left Right
Mark the middle Level
5"
Min.
(Rear piping hole)
5"
Min.
Wall
Wall 6"
Min.
Minimum clearances as noted above. Mount indoor unit with a minimum 6” to ceiling. Indoor unit should have
approximately 16 feet of unobstructed area directly in front for proper air flow for the 9K and 12K indoor units.
The 18K should have approximately 25 feet of unobstructed area directly in front. Line set can exit at the right
or left rear or ends of the indoor unit.
Be sure that the indoor unit is mounted firmly to the wall, and that the wall structure will support the weight of
the unit.
Be sure that the air inlet and outlets are unobstructed.
Be sure that all clearances are as noted in the above Figure 1.
This unit is not designed to be connected to a plug-in outlet.
Do not install this unit near a heat source, direct sunlight, near hazardous chemicals or combustible gases.
2. Mounting the Wall Plate
After determining an acceptable location for the indoor unit,
fasten the wall bracket securely to the wall using the proper
anchors (installer supplied). Be sure the wall bracket is level and
firm to the wall using a minimum of 4 screws or wall anchors.
Failure to mount the wall bracket level can result in improper
condensation drainage.
3. Wall Penetration
Using the measurements in Figure 1, determine the exit point of
the line set. For best results, the right rear is preferred. Left rear
exit of the line set requires that the line set be connected to the
indoor unit prior to mounting it to the wall plate. If desired the line
set may run along the inside wall by removing the cutouts along
the back edge of the case. Line sets mounted along the inside
wall may be covered with Plastic-Duct line set covering (See
page 4).
Cut a 2-5/8” hole slanted downward towards the outside.
Hole diameter is based on wall sleeve made from 2-1/2” PVC
pipe. Wall penetration should be slanted slightly downward to
the outside a minimum of 3/8" to provide proper condensation drainage.
Inside Outside
Wrap with
tape
Figure 1
Figure 2

950-0289revB - 10 - July 22, 2022
Wall sleeve can now be inserted into the hole.
Insert sleeve from the inside to the outside. The
sleeve should be approximately 3/16” longer than
the wall thickness.
4. Identify Line Sets
Mark the line sets as necessary to prevent
crossed connections. Crossed line sets will
prevent proper operation.
5. Identify Interconnect cables
Connect interconnect cable and identify cable at
both ends using labels supplied with outdoor units.
Cable routed to terminal from rear of indoor unit.
6. Mounting the Indoor Unit
If right rear exit of line set is used the indoor
unit can now be mounted. Remove retaining
clips from back of unit to allow access to the line
set stubs. Gently form the line set stubs straight
outward. Use caution when forming the line set;
being careful not to kink the copper lines. See
Figure 3.
7. Connecting Line Set
If installer determines the line set should be
connected at this time, see page 15 for torque
standards.
8. Hang the Indoor Units
Once lines are straight, carefully slide the ends of line set out through the wall sleeve. Hook the indoor unit onto
the top clips of the wall plate. Carefully lower the bottom portion of the indoor unit towards the wall, snapping it
into the clips at the bottom of the unit. See Figure 4.
If using the left rear exit run lines from outside to indoor unit. Form line set to mate to indoor unit stubs and
connect prior to mounting to indoor unit. If necessary run lines along inside wall and carefully remove the proper
cut out from the indoor unit housing. Line sets may be covered with Plastic-Duct for a more professional job
(see page 5).
9. Inspect the Installation
Ensure that the hooks at the top and bottom of the inside
unit are firmly locked in place.
10. Verify the Indoor Unit is Properly Leveled.
Accurate leveling is critical to prevent water damage
during operation.
11. Check the Drain Hose
Observe that the condensate drain pipe does not curve
upward and is in the lower part of the pipe bundle. See
Figure 5.
12. Seal the Hole
Fill the gap between the wall sleeve and the line set with
sealing putty (installer provided) to prevent outside air and
moisture from entering room (see Figure 6).
Note：For the detail information about other types of
indoor unit, please refer to the manual to be included with
each Indoor unit.
Inside Outside
Seal Putty
Drain hose
Curve upward
Figure 5
Pipelines of indoor unit
Drain pipe Rear pipe
Figure 4
Figure 6
Figure 3
See page 15,
Figure 13

950-0289revB - 11 - July 22, 2022
OUTDOOR UNIT (CONDENSER) INSTALLATION
Outdoor unit dimension
MZ18H424ZMO / HMZ18H424ZMO –Dual Zone,
MZ27H424ZMO / HMZ28H424ZMO –Triple Zone,
MZ36H424ZMO –Quad Zone
Unit: inch
Model
W
D
H
W 1
A
B
MZ18H424ZMO
35.0
13.5
26.50
39.0
26.1
13.9
HMZ18H424ZMO
37.2
16.5
31.9
40.6
26.5
15.9
MZ27H424ZMO
HMZ28H424ZMO
MZ36H424ZMO

950-0289revB - 12 - July 22, 2022
HMZ36H424ZMO –Quad Zone
MZ48H424ZMO / HMZ48H424ZMO–Five Port
Unit: inch
Outdoor unit location
The location must allow easy servicing and provide good air circulation as shown in the illustration below:
20"
40"
79"
20"
20"20"
79"
Model
W
D
H
W 1
A
B
HMZ36H424ZMO
MZ48H424ZMO
HMZ48H424ZMO
37.5
16.3
52.5
41.7
25.0
15.9
Figure 7
Top View
Side View

950-0289revB - 13 - July 22, 2022
Mounting the Outdoor (condenser) Unit
Follow the clearance guidelines in the diagram above.
Clearance distances are minimums. Minimum
clearance above unit is 12" to allow for servicing.
Install drain plug as in Figure 8 (included). Drain hose
not included.
Do not mount this unit close to combustibles or heat
sources.
Although this unit is fairly quiet when in operation, do
not mount this unit where noise issues could be a
problem.
Mount unit on an equipment pad or solid surface, install drain plug and tube as necessary. If wall mounting is
necessary a wall mount bracket may be purchased (BR-440L) for this purpose. Follow mounting instructions for
bracket to ensure safe installation.
Anchor bolts of the proper size and type (Installer provided) must be used.
For best results mount this unit as close as possible to the evaporators. Check maximum line length
specifications before mounting.
Maximum Line length and height
Outdoor Unit
Equivalent length of the farthest fitting pipe Lx
L1 L2 L3 L4 L5
Indoor Unit
Indoor Unit
Height difference
between
indoor units H2
Height difference between
outdoor and indoor units H1
a b
c d e
Connection Length
MZ18H424ZMO
HMZ18H424ZMO
DUAL ZONE
SMZ27H424ZMO
HMZ28H424ZMO
TRIPLE ZONE
MZ36H424ZMO
HMZ36H424ZMO
QUAD ZONE
MZ482H424ZMO
HMZ48H424ZMO
FIVE PORT
Total Length
L1+L2 ≤ 131 ft.
L1+L2+L3 ≤ 197 ft.
L1+L2+L3+L4 ≤ 262 ft.
L1+L2+L3+L4+L5 ≤ 262 ft.
Lx - Max. Length for any
indoor unit
82 ft.
98 ft.
115 ft.
115 ft.
H1 - Max. Height between
each indoor and the outdoor
unit
49.2 ft.
49.2 ft.
49.2 ft.
49.2 ft.
H2 - Max. Height difference
between indoor units
32.8 ft.
32.8 ft.
32.8 ft.
32.8 ft.
MAXIMUM LINE LENGTH AND / OR HEIGHT MUST NOT BE EXCEEDED!
Figure 8
Figure 9

950-0289revB - 14 - July 22, 2022
CONNECTING LINE SET
CAUTION! IMPROPER CONNECTION OF THE LINE SETS WILL RESULT IN IMPROPER OPERATION OF
THE SYSTEM. MARK EACH LINE SET AND WIRING FOR IDENTIFICATION. IDENTIFICATION LABELS
ARE INCLUDED WITH EACH OUTDOOR UNIT. ENSURE THAT THE WIRING AND THE LINE SETS ARE
ROUTED TO THE PROPER INDOOR ZONE.
INDOOR UNITS
Indoor Unit Type
Capacity
Liquid Line
Suction Line
Wall Mounted, Console, Cassette
Floor / Ceiling, Ducted, Air Handler
6K, 9K
1/4”
3/8”
12K, 18K
1/4”
1/2”
24K, 30K, 36K
3/8”
5/8”
OUTDOOR UNITS (adapters included)
Adapter
Refrigerant Tubing
1. After the outside unit is secured to the mounting location (Pad, Wall Brackets, etc.), route the line set(s)
from the Indoor unit to the outdoor unit, and secure with clamps or Plastic-Duct as required.
Installation Notes:
The MZ18H424ZMO / HMZ18H424ZMO Dual Zone unit are designed to run two indoor units. (See
page 6)
The MZ27H424ZMO / HMZ28H424ZMO Quad Zone unit are designed to run two or three units. DO
NOT use this system with one indoor unit. (See page 5)
The MZ36H424ZMO / HMZ36H424ZMO Quad Zone unit are designed to run two, three, or four indoor
units. DO NOT use this system with one indoor unit. (See page 5)
The MZ48H424ZMO / HMZ48H424ZMO Five Port unit is designed to run two, three, four or five indoor
units. DO NOT use this system with one indoor unit. (See page 6)
The outdoor unit is supplied with a sufficient refrigerant charge of R410A for a maximum Design
Length, no extra refrigerant required. Beyond this length additional refrigerant is required and must be
weighted in. (see specifications)
Indoor unit contains a small quantity of nitrogen. DO NOT remove the caps until the tubing is ready to be
installed.
NOTE: An oil trap is recommended to be installed if the indoor unit is over 15 feet in height from the outdoor
unit. To prevent kinking, bend tubes using a tubing tool.
CAUTION! WHEN REMOVING THE VALVE CAPS, DO NOT STAND IN FRONT OF VALVES, AS THE
SYSTEM IS UNDER HIGH PRESSURE.
CAUTION! DO NOT BRAZE TUBING OR USE THREAD SEALANT. USE FLARE CONNECTIONS ONLY.
Outdoor Unit Type
Port A
liquid-suction
Port B
liquid-suction
Port C
liquid-suction
Port D
liquid-suction
Port E
Liquid-suction
18K Dual Zone
1/4”-3/8”
1/4”-3/8”
N/A
N/A
N/A
27K Triple Zone
1/4”-3/8”
1/4”-3/8”
1/4”-3/8”
N/A
N/A
28K Triple Zone (Peak Heat)
1/4”-3/8”
1/4”-3/8”
1/4”-1/2”
N/A
N/A
36K Quad Zone
1/4”-3/8”
1/4”-3/8”
1/4”-3/8”
1/4”-1/2”
N/A
36K Quad Zone (Peak Heat)
1/4”-3/8”
1/4”-3/8”
1/4”-1/2”
1/4”-1/2”
N/A
48K Five Port
1/4”-3/8”
1/4”-3/8”
1/4”-3/8”
1/4”-1/2”
1/4”-1/2”
Figure 10

950-0289revB - 15 - July 22, 2022
2. Line set can now be cut (if necessary), to the proper length. Cut the tubing a little longer than measured
distance. Completely remove all burrs from the crosscut section of tubing. Do not allow debris to fall into
copper tube. It is extremely important to clean the copper tubing prior to connecting to system.
3. Install flare nuts and follow standard flaring procedures. Use proper flaring tools for a leak proof connection.
If a flared section is defective, cut it off and follow standard flaring procedures again.
4. After cutting to length, creating the flares and before connecting the line set, clear all foreign materials by
blowing nitrogen through copper tubing. Align the center of the tubing flare with its mating connector. Screw
on the flare nut by hand and tighten the nut with a spanner and torque wrench. See Figure 11.
Note: Exceeding the tightening torque will damage the flare surface.
Tightening Torque Table:
1/4”
11 –22
lbs ft.
3/8”
23 –29
lbs ft.
1/2”
33 –37
lbs ft.
5/8”
44 –48
lbs ft.
5. Verify that the proper line set is being connected to
the intended port of the outdoor unit. Connect the
line sets to their appropriate fittings on the outside
unit, and torque the flare fittings per the table above.
6. Bundle all lines, control cables and condensation
drain together. Be sure to leave ample length on
control cable to allow for termination. Bundle can be
secured together using vinyl tape.
Note: Condensation drain MUST be placed at the
bottom of the bundle as shown in the Figure 13.
Failure to do so may cause evaporator to drain
improperly.
7. Line sets must have each tube insulated separately,
including their unions with at least 1/4” thick
insulation. Wrap the refrigeration tubing, drain hose,
and electrical cables with a UV protected vinyl tape.
Overlap insulation at all refrigeration joints per
Figure 14.
Note: Completely wrap line set with insulation.
Insulation joints may overlap if desired.
CAUTION! Failure to completely wrap both lines with insulation may result in damage from condensation
forming on lines, and dripping onto walls, ceilings, etc.
Vinyl tape
Connectionpipe
(h eat in sula tion )
Indoor unitpiping
Bindthe s tog eth er
sothat th ereis noga p
pipe .
Overlapthe insulation
Torquewrench
Spanner
Flarenut
Joint Connectionpipe
Suction Line
Liquid Line
Condensation Drain
Control cable
Figure 12
DO NOT CROSS WIRES OR CROSS
CONNECT SYSTEMS TO OUTDOOR
UNIT.
Figure 11
Figure 13
Figure 14

950-0289revB - 16 - July 22, 2022
ELECTRICAL CONNECTION
WARNING! Improper wiring between the inside units and the outside unit can cause serious damage to
the system, and the risk of personal injury or fire. Use caution when connecting the wiring
to ensure that the wires are connected properly.
DO NOT USE THERMOSTAT WIRE TO CONNECT OUTDOOR TO INDOOR UNIT!
NOTES:
- Electrical wiring and connections should be made by qualified electricians in accordance with National and
Local electrical codes and regulations.
- Proper grounding is a must.
- Voltage range is 187 –253 VAC.
- See the specifications page for proper wire sizes and circuit breaker sizes.
- Connect the control cables according to the diagrams on page 18.
- Make power connections per diagram on page 18.
Specifications
Compressor stop / start frequency
Stop time
3 minutes or more
Power source voltage
Voltage fluctuation
Within ±10% of rated voltage
Voltage drop during start
Within ±15% of rated voltage
Interval unbalance
Within ±3% of rated voltage
Connect the Cable to the Outdoor Unit
1. Remove the cover on the right side of the outdoor unit.
2. Remove the cable clamp and connect the power connection cable to the
terminal.
3. Connect the wires to the terminals. Wiring should be terminal to terminal and
to correct indoor unit. (See wiring diagram Figure 18). Do not cross wires!
4. Reattach the cable clamp.
5. Reinstall the cover.
6. Secure wire cables.
Figure 15a

950-0289revB - 17 - July 22, 2022
TYPICAL ELECTRICAL WIRING CONNECTIONS
Typical electrical wiring for the Dual and Quad Zone units. (Dual Zone units use “A” and “B” connections, Triple
Zone units use “A”, “B”, “C” connections, Quad Zone unit use “A”, “B”, “C” and “D” connections, Five Port unit
use “A”, “B”, “C”, “D” and “E”).
16 AWG STRANDED
4 Conductor Cable 16 AWG STRANDED
4 Conductor Cable)
To the power supply
To unit B To unit C
supply power
cable
16 AWG STRANDED
4 Conductor Cable
L1
L1
L1
To unit E
EDC
B
A
INDOOR UNIT A
G G G G G
INDOOR UNIT B INDOOR UNIT C INDOOR UNIT D INDOOR UNIT E
1(A) 2(A) 3(A) 1(B) 2(B) 3(B) 1© 2(C) 3(C) 1(D) 2(D) 3(D) 1(E) 2(E) 3(E)
Wiring identification labels are supplied with each outdoor unit.
Figure 15b

950-0289revB - 18 - July 22, 2022
Figure 17
Electrical connection of the indoor unit (Wall-mounted)
Open the front cover by pressing inward on the sides of the cover near the bottom to release, then pull bottom
of cover outwards.
Feed the cable wire in from the rear of unit.
Open the electric box cover; connect the wires to the terminal strip individually according to the wiring diagram
above. Ensure that the colors of the wires and terminal No. are the same as the wiring diagram. Tighten
terminal screws for safe connections.
DO NOT CROSS WIRES
DO NOT CONNECT CONDENSATE PUMP TO THE INDOOR UNIT
After wiring, replace the electric box cover, and then close the front panel by pressing the corners inward to
latch.
Note：For detailed information about other types of indoor units, please refer to the manual packed with each
indoor unit.
Screws
ConnectingCable
FrontPanel
TerminalBoard
ElectricBox
Cover
Cabletobefed
fromrearof unit
Figure 16
Will vary by Model.
Identify each end of the interconnect cable and each of the
conductor using the labels provided. Units A, B, C, D and E.

950-0289revB - 19 - July 22, 2022
TYPICAL OUTDOOR INSTALLATION
IntakeAir
Exhaust Air
Figure 18a
Figure 18b
Figure 18c
Dual Zone
Outdoor Unit Quad Zone
Outdoor Unit
(Peak Heat)
Figure 18d
1/4”
1/2”
A
B1/4”
1/2”
1/4”
3/8”
C
D1/4”
3/8”
Adapter
A1/4”
3/8”
1/4”
3/8”
B
Five Port
Outdoor Unit
1/4”
1/2”
A
B1/4”
1/2”
1/4”
3/8”
C
D1/4”
3/8”
E1/4”
3/8”
Triple Zone
Outdoor Unit
A1/4”
3/8”
1/4”
3/8”
B
1/4”
3/8”
C
Quad Zone
Outdoor Unit
1/4”
1/2”
A
B1/4”
3/8”
1/4”
3/8”
C
D1/4”
3/8”
Triple Zone
Outdoor Unit
(Peak Heat)
A1/4”
1/2”
1/4”
3/8”
B
1/4”
3/8”
C