Gree MULTI21 CAS12HP230V1AC User manual

Technical Product Guide
MULTI CEILING CASSETTES
Models:
CAS12HP230V1AC
CAS18HP230V1AC
CAS24HP230V1AC

Table of Contents
Product Overview .................................2-3
Features and Benefits ............................. 4-6
Product Nomenclature .............................. 6
Product Performance Data ..........................7-8
Dimensional Specifications.........................9-10
Clearance Specifications.............................11
Installation of Mounting Hangers......................12
Condensate Drain Designs ...........................13
Limited Warranty Statement ......................14-15

Height Dierence
Between Indoor Units:
50ft
PRODUCT OVERVIEW
SUPERIOR DESIGNS PROVIDE EASY SOLUTIONS TO COMPLEX PROBLEMS
GREE Ductless Multi Zone systems provide quiet comfort and energy ecient heating and cooling in up to
five dierent rooms – without ductwork. For most residential and light commercial applications, this is the ideal
solution to balance comfort, eciency and ease of installation. This Inverter-driven system oers Seasonal
Energy Eciency Ratings (SEER) up to 16. With individual room control and variable speed compressor
operation, comfort is boosted throughout your home or oce, while utility bills are held in check.
Gree’s exclusive G-10 Inverter technology powers the twin rotary compressor inside the Multi Zone
outdoor compressor section. The G-10 Inverter constantly adjusts the compressor speed to maintain
a comfortable room temperature. This saves energy, reduces outdoor noise and maintains a steady
room temperature by eliminating the harsh starts and stops of conventional systems.
When laying out a new project, you’ll appreciate the flexibility of Gree’s Multi Zone Systems. A single outdoor unit
can simultaneously power up to five indoor units while eliminating expensive ductwork. Without those ducts, your
installation is simpler, faster and more cost-eective. And the flexibility doesn’t stop there, as you can also mix
and match your choice of Wall Mount, Ceiling Cassette, Concealed Duct, Universal Floor/Ceiling and Mini Floor
Console indoor units to create a unique heating and cooling system to perfectly fit any project.
2
No pipe sweating
No sweating is needed for the pipe connection
between the indoor and outdoor units. All
piping connections are flared to simplify and
ease the piping installation.
Simple Wiring
No special or hard-to-find communication
wire is needed between the indoor and
outdoor units. The system uses common
14-4 AWG stranded copper THHN 600V
wire. The system’s communication is ready
as soon as the electrical wiring between the
indoor and outdoor units is complete.
High Lift Design
Gree’s High Lift design allows for extended
piping length, up to 262 feet total, as well as
50 feet of vertical lift from the condensing
units. This allows for greater flexibility in the
layout of the system.
Allows up to 262 feet of pipe length
Outdoor Unit
Indoor Unit
Power
Supply
Transmission System
Energy Saving
Multi Zone systems allow each room to be individually controlled. Only those rooms requiring air
conditioning (or heating) are cooled (or heated), and all of it is accomplished without ductwork.
In addition, Gree’s G-10 inverter technology reduces energy waste, maximizes eciency and
achieves up to 16 SEER.
1st Branching
Section
Height Dierence
Between Indoor Unit
and Outdoor Unit:
50ft
82ft
From Outdoor Unit to
the Indoor Unit:
82ft

PRODUCT OVERVIEW
3
Self-Diagnostics System
Each indoor and outdoor unit continuously runs
a series of multi-point diagnostic tests on the
system, to automatically scan for unacceptable
operating conditions or malfunctions. If such
conditions occur, the system takes corrective
action or stops. The fault code will be shown
on the indoor, outdoor and wired controller displays.
Problems and system status are displayed with
comprehensive diagnostic codes to simplify system
troubleshooting and shorten repair times.
Flexible Design
Gree’s Multi Zone systems have many advantages
for both the property owner and the installer.
Up to five indoor units, powered by a single
outdoor unit, results in flexible zoning solutions
for almost any application. Various styles of
indoor units may be mixed and matched in any
combination to create a unique, multiple zone
heating and cooling system. Choose from Wall
Mount, Ceiling Cassette, Slim Duct, Universal
Floor/Ceiling and Mini Floor Console indoor units.
All are lightweight and compact enough to be
installed on the wall or in any ceiling space.
Intelligent Control
Gree’s Multi Zone components use state-of-the
art intelligent controls to generate the ultimate
in room comfort. G-10 Inverter technology
delivers the exact level of required capacity (from
10% to 100%) to maintain room temperature and
humidity in the comfort range. The optimized PID
controls maintain the room temperature within
less than ±1.0°F of the room setpoint temperature.
The result is a virtually constant room temperature
without the typical fluctuations that occur with a
conventional fixed speed ON/OFF system.
Ductless Saves Money
Realize energy savings by eliminating heat loss
from inecient and leaky ductwork. The average
ducted air distribution system could reduce
overall system eciency by up to 30 percent.
Eliminating ductwork allows you to downsize
equipment while upsizing performance.
Diagnostic
Code
E1
E2
E3
E4
E5
E6
E7
E9
F4
Malfunction
Compressor High Pressure Protection
Indoor Coil Anti-Freeze Protection
Low Pressure Protection
High Discharge Temperature Protection
Compressor High Temperature Protection
Indoor/Outdoor Communication Failure
Heating & Cooling Modes Conflict
Condensate Water Too High
Outdoor Coil Sensor Failure
Cooling
Gree Inverter Control System
Room temp.
Conventional Fixed Speed System
One outdoor unit
can power up to
5 indoor units.

Whisper Quiet
Gree systems are both energy ecient and quiet. Wall mounted units operate with sound levels
starting as low as 35 dB(A).
Subtle Appearance
This flexible ceiling mount unit conveniently disappears above the surface of any room’s hard or
drop ceiling.
Convenient Size (12K and 18K only)
The Gree ceiling cassettes can be easily mounted in a hard ceiling (with an access panel for servicing
or in 2’x2’ drop ceiling. They provide great air distribution, quiet operating and a less obtrusive style.
Multi-Speed Fan
The indoor fan can run at up to three dierent speeds (Low, Medium, or High) for either COOLING
or HEATING mode for maximum comfort and quiet operation.
4-Way Discharge Air
The Gree ceiling cassette is designed to bring return air in through the center and quietly discharge
the air out along each of the four exterior sides.
Decorative Discharge Air Grille (sold separately)
The cassette Decorative Grille is made of strong resilient polymer. It’s designed to fit attractively in any interior
décor. The Decorative Grille is sold separately and is required to complete installation of the systems.
Built-In Condensate Lift Pump
The unit features a built-in drain pump that lifts condensation up to 11 inches above the drain pan to a
gravity condensate drain system. In most cases, the internal condensate lift mechanism will avoid the
need for an external condensate pump.
Condensate Sentry
The unit’s fail-safe mechanism recognizes when there is a high level in the condensate pan and shuts
o the system to prevent overflow problems.
FEATURES AND BENEFITS
Gree’s +Multi Ceiling Cassette will inconspicuously provide quiet performance through innovative design. The +Multi Ceiling Cassette
is extremely suitable for any room, and can be easy installed in suspended ceilings with only a discreet decorative discharge grille
visible. Gree’s fan technology quietly and evenly distributes conditioned air throughout the room, and an internal condensate lift pump
reliably disposes condensate water to a safe location. The +Multi Ceiling Cassette is ideal for light commercial applications which
require comfort control in large, open spaces. Each +Multi Ceiling Cassette can be operated by an infrared remote control or wired
tether controller, allowing maximum flexibility for any application.
+Multi Ceiling Cassettes
4

Intelligent Pre-Heating
The Multi Zone system guards against the annoying COLD BLOW in heating mode. The system constantly
monitors the discharge air temperature. It will delay the indoor fan until the indoor coil has warmed
up to prevent blowing uncomfortable cool air into the room.
Controller
The unit comes with a factory supplied wired Tether Controller or Wireless Remote Controller.
Note: the controllers are mutually exclusive. They cannot be used at the same time.
IR Wireless Remote Controller
The Gree multi-functional infrared hand held wireless controller is sleek, ergonomically
designed, easy to use and has a large backlit LCD display.
Tether Controller (Optional)
The Gree wired tether controller mounts to the wall up to 25 feet from the unit. It provides
complete control over operation mode, desired temperature, fan speed, airflow direction
and more.
Mode Button
The units can be set to five dierent operating modes: HEAT, COOL, DRY, FAN ONLY and AUTO.
Note: AUTO MODE has fixed setpoints of 68° F heating and 78° F cooling, which are not changeable.
The system will automatically select heating or cooling to maintain room temperature within this band.
Timer Mode
The unit can be programmed to turn ON or OFF after a specific amount time. The time period is
adjustable between one half and 24 hours.
I Feel Mode
The unit will sense room temperature at the remote controller instead of at the indoor unit. It then adjusts
airflow and temperature accordingly for the ultimate in personal comfort control and energy savings.
Swing Louver
The unit has adjustable swing louvers which can be controlled from the wired tether or wireless
controllers. Vertical swing louver allows five dierent air discharge directions including Continuous
Sweep. Maximize comfort by adjusting the direction of airflow in the room by moving the louvers
up or down.
Privacy Lock Mode
Both wired tether and wireless controllers have a Privacy Lock to avert unauthorized access and stop
tampering with system settings.
Sleep Mode
The unit will automatically adjust room temperature during sleep time. This slight change in
temperature will not aect your comfort level due to the natural eects that sleeping has on the
body, but it will save on energy consumption and will lower electric bills.
Fahrenheit °F / Celsius °C
The wired tether and wireless controllers can be set to display in either °F or °C.
FEATURES AND BENEFITS
5

Power Failure Mode
Power interruptions are no problem. User selections and system parameters are stored in non-volatile
memory. These parameters are retained during a power failure. When power is returned, the system
will automatically return to the last operating mode.
Polymeric Air Filter
One piece removable polymeric air filter easily slides in and out from the ceiling cassette. The filter
is washable and permanent.
Self-Diagnosis
With an on-board computer using real-time diagnostics, the Gree Multi Zone system helps to prolong
its own life. The automatic diagnosis feature continuously scans for unacceptable operating conditions
or malfunctions. If such conditions occur, the system takes corrective action or stops. Fault codes are
shown on the unit display to facilitate easy troubleshooting and repair.
Fresh Air Intake (24K model only)
The 24K size ceiling cassette has a ventilation air knockout that allows a 4 inch flex duct connection and a
field supplied duct booster fan. The maximum fresh air allowed is 10% of unit high speed fan airflow rating.
Agency Listings
All systems are listed with AHRI (Air conditioning, Heating, and Refrigeration Institute) and are
ETL certified per UL Standards.
7/5 Year Limited Warranty
Enjoy one of the most comprehensive warranties in the industry. Seven (7) years on compressor
and Five (5) years on all parts.
FEATURES AND BENEFITS
+Multi Ceiling Cassettes
6
NOMENCLATURE
CAS 12 1 A C
Series Designation
CAS - Ceiling Cassette
MULTI - Multiple Port Outdoor Unit
DUCT - Slim Duct Indoor Unit
NEO - Neo Indoor High Wall
FLR - Floor/Ceiling Unit
CONS - Mini Console
Product Type
S - System
O - Outdoor Units
H - Indoor High Wall
D - Indoor Duct
C - Indoor Cassette
F - Indoor Floor/Ceiling
Revision Level
Style/Color Designation
Electrical Rating
230V - 208/230V 60Hz 1PH
115V - 115V 60Hz 1PH
HP 230V
Cooling Capacity
12 - 12,000 BtuH
18 - 18,000 BtuH
24 - 24,000 BtuH
Model Type
AC - Cooling Only
HP - Heat Pump
HC - Heat/Cool

PERFORMANCE SPECIFICATIONS AND DATA
7
MODEL NUMBER LOW FAN MEDIUM FAN HIGH FAN
CAS12HP230V1AC 251 292 353
CAS18HP230V1AC 251 292 353
CAS24HP230V1AC 465 509 694
MODEL NUMBER
CAS12HP230V1AC 11,946 13,652 3.0
CAS18HP230V1AC 15,359 17,065 3.8
CAS24HP230V1AC 22,867 27,304 4.4
MODEL NUMBER
CAS12HP230V1AC Polymeric Mesh 4-way Axial
CAS18HP230V1AC Polymeric Mesh 4-way Axial
CAS24HP230V1AC Polymeric Mesh 4-way Axial
MODEL NUMBER LOW FAN MEDIUM FAN HIGH FAN
CAS12HP230V1AC 251 292 353
CAS18HP230V1AC 251 292 353
CAS24HP230V1AC 465 509 694
COOLING (CFM)
HEATING CAPACITY
(BtuH)
AIR FLOW
DEHUMIDIFICATION
(Pts./hr.)
FAN TYPE
COOLING CAPACITY
(BtuH)
AIR FILTER TYPE
HEATING (CFM)
Ceiling Cassette
Ceiling Cassette
Ceiling Cassette
Ceiling Cassette

+Multi Ceiling Cassettes
PRODUCT WEIGHT
Ceiling Cassette
Decorative Grill
CAS12HP230V1AC 40 lbs. 51 lbs.
CAS18HP230V1AC 40 lbs. 51 lbs.
CAS24HP230V1AC 62 lbs. 77 lbs.
CAS12HP230V1AC 6 lbs. 8 lbs.
CAS18HP230V1AC 6 lbs. 8 lbs.
CAS24HP230V1AC 6.5 lbs. 10 lbs.
MODEL NUMBER
MODEL NUMBER
PRODUCT WEIGHT
PRODUCT WEIGHT
NET OPERATING
NET OPERATING
GROSS SHIPPING
GROSS SHIPPING
SOUND DATA
ELECTRICAL DATA
Ceiling Cassette
Ceiling Cassette
CAS12HP230V1AC 52 dBA 42 dBA 54 dBA 44 dBA 56 dBA 46 dBA
CAS18HP230V1AC 52 dBA 42 dBA 54 dBA 44 dBA 56 dBA 46 dBA
CAS24HP230V1AC 55 dBA 35 dBA 47 dBA 37 dBA 49 dBA 39 dBA
CAS12HP230V1AC 208/230v-1ph-60hz 187-253 0.2 11.0
CAS18HP230V1AC 208/230v-1ph-60hz 187-253 0.2 11.0
CAS24HP230V1AC 208/230v-1ph-60hz 187-253 0.4 50.0
MODEL NUMBER
MODEL NUMBER
LOW FAN
RATED POWER SUPPLY
(volt-phase-hz)
SOUND
PRESSURE SOUND PRESSURE SOUND PRESSURE
SOUND
POWER SOUND POWER SOUND POWER
MEDIUM FAN
VOLTAGE RANGE
(volts)
HIGH FAN
INDOOR FAN
RLA (amps) POWER (watts)
Note: 1. Sound pressure ratings are estimated sound pressure measurements, 3 feet from unit.
2. Sound power ratings are per AHRI 270 and AHRI 350
Legend: RLA – Rated Load Amps
8

DIMENSIONAL SPECIFICATIONS
Model No: CAS12HP230V1AC 12,000 BtuH
Model No: CAS18HP230V1AC 18,000 BtuH
9
Suction/Gas Line Port Size
12,000 BtuH 3/8-in OD Flared
18,000 BtuH 1/2-in OD Flared
Liquid Line Port Size
12,000 BtuH 1/4-in OD Flared
18,000 BtuH 1/4-in OD Flared
Drain Line Connection
12,000 BtuH 1.2-in OD Flared
18,000 BtuH 1.2-in OD Flared

DIMENSIONAL SPECIFICATIONS
+Multi Ceiling Cassettes
10
Model No: CAS24HP230V1AC 24,000 BtuH
Suction/Gas Line Port Size
Port 1 5/8-in OD Flared
Liquid Line Port Size
Port 1 3/8-in OD Flared
Drain Connector
Drain Line 1.2-in OD

MINIMUM INDOOR CLEARANCE SPECIFICATIONS
11
The unit installation must meet or exceed the following minimum clearances for proper operation.
Installation stands for main body of the unit.
Drainage hose
Refrigerant pipes
Pipe insulation
Air inlet grille
Air outlet vent
Above 0.75-in
6.25-in
Ceiling

INSTALLATION OF MOUNTING HANGERS
+Multi Ceiling Cassettes
12
FPO
Depending on the type of ceiling, threaded hanger bolts (field supplied) are recommended for securing
Ceiling Cassette to the ceiling or support studs.
Proper mounting hardware is critical which includes upper nuts, lower flat washers (with insulation), top
flat washers (without insulation), top nuts and locking nuts (double) on the threaded hanger bolts as show
in diagram below.
Ceiling
Mounting
Bracket
Threaded
Hanger Bolt
Washer
Washer
Nut
Nut
Nut

CONDENSATE DRAIN DESIGNS
13
Gravity Drainage Systems with P-trap & Vent
Pitch the condensate drain pipes at a gradual 2.5%
pitch (Example: 1/4-in. drop over a 10-in. length)
without obstructions. Use pipe hanger/brackets to
support the condensate drain pipe from drooping.
Insulate all pipes to prevent sweating and water
damage.
Multiple Units with Common Drain
The following is the recommended condensate
drainage system for multiple units that share a
common drain line. Connecting multiple units to one
trap allows air to be pulled through one or more of
the units, bypassing the trap. An alternate method
is having individual drains and traps for each unit.
Vertical Lift Drainage System
If a gradual pitch from the drainage port is not
obtainable, the Ceiling Cassette contains an internal
condensate pump with limited head or lift. The
condensate drain pipe may have a vertical height of
11-in. (280 mm) maximum above the unit drainage
port within the first 12-in. (300 mm) as long as the
remaining condensate drain pipe gradually descends
from that point and aligns with drainage port.
Use an auxiliary condensate pump with float valve
for vertical height greater than 11-in. (280 mm) above
the unit drainage port. A float valve is recommended
to shut o the system if the auxiliary pump fails.
It’s recommended to build the condensate drain system with hard polyvinyl chloride (PVC) pipe and matching
connectors. Use pipe with either the same diameter or larger than the unit drainage port.
Ceiling
Ceiling
Ceiling
Hangers
Hangers
Hanger
Wall
Wall
Wall
Wall
11-in
max
12-in
max

Limited Warranty Statement
14
Eective on new GREE Ductless purchases on or after March 1, 2013
DUCTLESS HEAT PUMP MULTI-SPLIT SYSTEMS
GREE distributor (hereinafter “Company”) warrants this product against failure due to defect in
materials or workmanship under normal use and maintenance as follows. All warranty periods
begin on the date of original installation. If the date cannot be verified, the warranty period begins
one hundred twenty (120) days from date of manufacture. If a part fails due to defect during the
applicable warranty period Company will provide a new or remanufactured part, at Company’s
option, to replace the failed defective part at no charge for the part. This limited warranty is
subject to all provisions, conditions, limitations and exclusions listed below.
• A warranty period of Seven (7) years on compressor to the original registered end user.
• A warranty period of Five (5) years on all parts to the original registered end user.
• A warranty period of One (1) year on the remote control provided with the original unit.
• Limited warranty applies only to systems that are properly installed by a state certied
or licensed HVAC contractor, under applicable local and state law in accordance with all
applicable building codes and permits; GREE installation and operation instructions and
good trade practices.
• Warranty applies only to products remaining in their original installation location.
• Defective parts must be returned to the distributor through a registered servicing dealer
for credit.
CAS12HP230V1AC
CAS18HP230V1AC
CAS24HP230V1AC

15
All implied warranties and/or conditions (including implied warranties or conditions of
merchantability and fitness for a particular use or purpose) are limited to the duration of this
limited warranty, some states or provinces do not allow limitations on how long an implied
warranty or condition lasts, so the above may not apply to you. The express warranties made
in this warranty are exclusive and may not be altered, enlarged, or changed by any distributor,
dealer, or other person, whatsoever.
THIS WARRANTY DOES NOT COVER:
1. Labor or other costs incurred for diagnosing, repairing, removing, installing, shipping, servicing
or handling of either defective parts, or replacement parts, or new units.
2. Product cleaning required prior to warranty service and repair.
3. Normal maintenance as outlined in the installation and servicing instructions or Owner’s
Manual, including filter cleaning and/or replacement and lubrication.
4. Failure, damage or repairs due to faulty installation, misapplication, abuse, improper servicing,
unauthorized alteration or improper operation.
5. Failure to start due to voltage conditions, blown fuses, open circuit breakers, or damages due
to the inadequacy or interruption of electrical service.
6. Failure or damage due to floods, winds, fires, lightning, accidents, corrosive environments
(rust, etc.) or other conditions beyond the control of the Company.
7. Failure or damage of coils or piping due to corrosion on installations within one (1) mile of
sea coast or corrosive body.
8. Parts not supplied or designated by Company, or damages resulting from their use.
9. Products installed outside continental USA and Canada.
10. Electricity or fuel costs, or increases in electricity or fuel costs for any reason whatsoever,
including additional or unusual use of supplemental electric heat.
11. Any cost to replace, refill or dispose of refrigerant, including the cost of refrigerant.
12. Shipping damage or damage as a result of transporting the unit.
13. Accessories such as condensate pumps, line sets and so forth are not covered.
14. Any special, indirect or consequential property or commercial damage of any nature whatsoever.
Some states or provinces do not allow the exclusion of incidental or consequential damages,
so the above limitation may not apply to you.
FOR WARRANTY SERVICE OR REPAIR:
Contact your installing contractor. You may find the installer’s name on the equipment or in
your Owner’s packet.
This warranty gives you specific legal rights, and you may also have other
rights which vary from state to state or province to province.
WSO021513-DLSWARR-MULTI – Rev. 10-15-14
LIMITATIONS OF WARRANTIES

Specifications in this booklet are subject to change without notice.
Manufacturer reserves the right to discontinue or modify specifications or
designs without notice or without incurring obligations. All rights reserved.
Cat# +MULTI-CA-1TPG Version: Original
© 2014 Gree Electric Appliance, Inc.