Gree FLEXX Series User manual

MODELS: Thank you for choosing our product.
Please read this Installation & Owner’s Manual carefully before
operation and retain it for future reference.
If you lose this Manual, please contact your local distributor
visit www.greecomcomfort.com/resources now to download an
file the electronic version.
FLEXX24C
FLEXX36C
FLEXX48C
FLEXX60C
G R E E C O M F O R T . C O M
Installation Manual
FLEXX
A COILS

To Users
Thank you for selecting Gree’s product. Please read this instruction manual
carefully before installing and using the product, so as to master and correctly use the
product. In order to guide you to correctly install and use our product and achieve
expected operating effect, we hereby instruct as below:
(1) This appliance can be used by children aged from 8 years and above and persons
with reduced physical, sensory or mental capabilities or lack of experience and
knowledge if they have been given supervision or instruction concerning use of
the appliance in a safe way and understand the hazards involved. Children shall
not play with the appliance. Cleaning and user maintenance shall not be made by
children without supervision.
(2) In order to ensure reliability of product, the product may consume some power
under stand-by status for maintaining normal communication of system and
preheating refrigerant and lubricant. If the product is not to be used for long, cut off
the power supply; please energize and preheat the unit in advance before reusing
it.
(3) Please properly select the model according to actual using environment;
otherwise it may impact the using convenience.
(4) This product has gone through strict inspection and operational test before leaving
the factory. In order to avoid damage due to improper disassembly and inspection,
which may impact the normal operation of unit, please do not disassemble the unit
by yourself. You can contact with the special maintenance center of our company
if necessary.
(5) When the product is faulted and cannot be operated, please contact with our
maintenance center as soon as possible by providing the following information.
1)Contents of nameplate of product (model, cooling/heating capacity, product No.,
ex-factory date).
2)Malfunction status (specify the situations before and after the error occurs).
(6) All the illustrations and information in the instruction manual are only for reference.
In order to make the product better, we will continuously conduct improvement
and innovation. We have the right to make necessary revision to the product from
time to time due to the reason of sales or production, and reserve the right to
revise the contents without further notice.

(7) If the supply cord is damaged, it must be replaced by the manufacturer, its service
agent or similarly qualified persons in order to avoid a hazard.
(8) Gree Electric Appliances, Inc. of Zhuhai assumes no responsibility for personal
injury, property loss or equipment damage caused by improper installation and
commissioning, unnecessary maintenance, or not following relevant national rules
and regulations, industrial standards and requirements in this instruction manual.
(9) The final right to interpret for this instruction manual belongs to Gree Electric
Appliances, Inc. of Zhuhai.
Exception Clauses
Manufacturer will bear no responsibilities when personal injury or property loss is
caused by the following reasons:
(1) Damage the product due to improper use or misuse of the product.
(2) Alter, change, maintain or use the product with other equipment without abiding by
the instruction manual of manufacturer.
(3) After verification, the defect of product is directly caused by corrosive gas.
(4) After verification, defects are due to improper operation during transportation of
product.
(5) Operate, repair, maintain the unit without abiding by instruction manual or related
regulations.
(6) After verification, the problem or dispute is caused by the quality specification or
performance of parts and components that produced by other manufacturers.
(7) The damage is caused by natural calamities, bad using environment or force
majeure.

Contents
1 Safety Precautions ............................................................ 1
2 Product Introduction ......................................................... 2
2.1 Product Description................................................................2
2.2 Optional Accessories..............................................................2
2.3 Physical Dimension................................................................3
2.4 Names of Main Parts..............................................................3
2.5 General Information ...............................................................4
3 General ............................................................................... 4
4 Installation.......................................................................... 4
4.1 Pre-Installation Instruction......................................................4
4.2 Location .................................................................................5
4.3 Piping Work............................................................................6
4.4 Condensate Removal.............................................................7
4.5 Ductwork................................................................................8
4.6 Unit Installation ......................................................................8
4.7 Sealing Ducts.......................................................................12
4.8 Leak Testing, Vacuuming and Charging ...............................12
5 Blower Speed Selection .................................................. 13
6 Maintenance and Care..................................................... 13
6.1 Drain Pipe ............................................................................13
6.2 Notice before Seasonal Use.................................................13
6.3 Maintenance after Seasonal Use .........................................13
6.4 Parts Replacement...............................................................13
7 After-Sales Service .......................................................... 14

A-Coil
1
1 Safety Precautions
This product can’t be installed at corrosive, inflammable or explosive environment
or the place with special requirements, such as kitchen. Otherwise, it will affect the
normal operation or shorten the service life of the unit, or even cause fire hazard or
serious injury. As for above special places, please adopt special air conditioner with
anti-corrosive or anti-explosion function.
Improper installation, adjustment, alteration, service, maintenance, or use can
cause explosion, fire, electrical shock, or other conditions which may cause death,
personal injury, or property damage. Consult a qualified installer, service agency, or
your distributor or branch for information or assistance. The qualified installer or agency
must use factory--authorized kits or accessories when modifying this product. Refer to
the individual instructions packaged with the kits or accessories when installing. Follow
all safety codes. Wear safety glasses, protective clothing, and work gloves. Use
quenching cloth for brazing operations. Have fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions included in literature and
attached to the unit. Consult local building codes and National Electrical Code (NEC)
for special requirements. Recognize safety information. This is the safety--alert
symbol .
When you see this symbol on the unit and in instructions or manuals, be alert to the
potential for personal injury. Understand these signal words: DANGER, WARNING,
CAUTION and NOTICE. These words are used with the safety--alert symbol.
Indicates a hazardous situation that, if not avoided, will result in
death or serious injury.
Indicates a hazardous situation that, if not avoided, could result
in death or serious injury.
Indicates a hazardous situation that, if not avoided, may result
in minor or moderate injury.
Indicates important but not hazard-related information, used to
indicate risk of property damage.

A-Coil
2
Electrical shock hazard:
Failure to follow this warning could result in personal injury or death.
Before installing, modifying, or servicing system, main electrical disconnect switch
must be in the OFF position. There may be more than 1 disconnect switch. Lock out
and tag switch with a suitable warning label.
Improper installation, adjustment, alteration, service or maintenance can cause
personal injury, loss of life, or damage to property.
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.
2 Product Introduction
2.1 Product Description
The GREE A-Coil offers the perfect combination of superior product quality,
operating efficiency, operating sound levels and value for money. The evaporator unit
uses the environmentally friendly refrigerant R410A, which is chlorine-free to help
prevent damage to the ozone layer.
2.2 Optional Accessories
Indoor unit accessories
No.
Name
Appearance
Q'ty
Usage
1 Throw-over
pipe 1
Connect the unit
with the liquid
pipe
2 Throw-over
pipe 1
Connect the unit
with the gas
pipe

A-Coil
3
2.3 Physical Dimension
Unit: inch(mm)
Model
Dimension
W
D
H
A
B
FLEXX24C 17-1/2(445)
21-1/4(540)
23(584)
15-7/8(403)
19-3/8(492)
FLEXX36C 17-1/2(445)
21-1/4(540)
23(584)
15-7/8(403)
19-3/8(492)
FLEXX48C 24-1/2(622)
21-1/4(540)
28-1/2(724)
22-7/8(581)
19-3/8(492)
FLEXX60C 24-1/2(622)
21-1/4(540)
28-1/2(724)
22-7/8(581)
19-3/8(492)
2.4 Names of Main Parts

A-Coil
4
2.5 General Information
Cooling capacity range as shown below:
Model
Cooling capacity(ton)
2.0
3.0
4.0
5.0
3 General
The evaporator of indoor unit is charged with refrigerant in factory for pressure
maintaining. The cut-off valve can be opened only when installation and vacuuming is
done.
The drain pan must be at least 2" away from a standard gas-fired furnace heat
exchanger and at least 4"-6" away from any drum-type or oil-fired furnace heat
exchanger, depending on furnace model. Closer spacing may damage the drain pan
and cause a leak.
Refer to the Product Specification for the proper use of these coils with specific
furnaces, air handlers, condensers and line sets.
4 Installation
4.1 Pre-Installation Instruction
4.1.1 Checking Product Received
After receiving the product, please check if there is any damage caused by
transportation. Shipping damage is the responsibility of the carrier. Verify the model
number, specifications and accessories are correct prior to installation. The distributor
or manufacturer will not accept claims from dealers for transportation damage or
installation of incorrectly shipped units.
4.1.2 Before Installation
Carefully read all instructions for the installation prior to installing product. Make
sure each step or procedure is understood and any special considerations are taken
into account before starting installation. Assemble all tools, hardware and supplies
needed to complete the installation. Some items may need to be purchased locally.
Make sure everything needed to install the product is on hand before starting.
FLEXX24C
FLEXX36C
FLEXX48C
FLEXX60C

A-Coil
5
4.1.3 Codes & Regulations
This product is designed and manufactured to comply with national codes. It is
installer’s responsibilities to install the product in accordance with such codes and/or
any prevailing local codes/regulations. The manufacturer assumes no responsibilities
for equipment installed in violation of any codes or regulations.
These instructions are intended as a general guide and do not supersede local or
national codes in any way. Authorities who have jurisdiction should be consulted before
installation.
4.1.4 Replacement Parts
When reporting shortages or damages, or ordering repair parts, give the complete
product model and serial numbers as stamped on the product. Replacement parts for
this product are available through your contractor or local distributor.
4.2 Location
This coil is designed for indoor installation only. Do not install it
outdoors.
Not suitable for use with ammonia.
When installing the coil, take consideration to minimize the length of refrigerant
tubing as much as possible. Do not install the air handler in a location either above or
below the condenser that violates the instructions provided with the condenser. Service
clearance is to take precedence. Allow a minimum of 25” in front of the unit for service
clearance, as shown below.

A-Coil
6
When installing in an area directly over a finished ceiling (such as an attic), an
emergency drain pan is required directly under the unit. See local and state codes for
requirements. When installing this unit in an area that may become wet, elevate the unit
with a sturdy, non-porous material. In installations that may lead to physical damage (i.e.
a garage) it is advised to install a protective barrier to prevent such damage.
It is necessary to allow a minimum of 40” between the inlet/outlet of the indoor unit
and wall, as shown below.
4.3 Piping Work
4.3.1 Specification of Connection Pipe
Model
External diameter (inch)
Gas pipe
Liquid pipe
Φ3/4 Φ3/8
4.3.2 Piping Preparation
4.3.2.1 Solder Connection
All cut ends are to be round, burr free, and cleaned. Failure to follow this practice
increases the chances for refrigerant leakage.
FLEXX24C
FLEXX36C
FLEXX48C
FLEXX60C

A-Coil
7
4.3.2.2 Screw Connection
Pipe diameter (inch)
Tightening torque (N·m)
Φ1/4
15-30
Φ3/8
35-40
Φ1/2
45-50
Φ5/8
60-65
Φ3/4
70-75
Φ7/8
80-85
4.4 Condensate Removal
(1) It is not allowed to connect the condensate drain pipe into waste pipe or other
pipelines which are likely to produce corrosive or peculiar smell to prevent the
smell from entering indoors or corrupt the unit.
(2) It is not allowed to connect the condensate drain pipe into rain pipe to prevent rain
water from pouring in and cause property loss or personal injury.
(3) Condensate drain pipe should be connected into special drain system for air
conditioner.
(4) The drain pan has primary and secondary drain connection. Condensate removal
is performed by attaching a 3/4” PVC pipe to the evaporator coil pan and
terminated in accordance with local or state Plumbing/HVAC codes. The
installation must include a “P” style trap that is located closely to the evaporator
coil. Do not over-tighten the drain connection in order to prevent possible damage
to the evaporator drain pan. See the following figure for details of a typical
condensate line “P” trap.

A-Coil
8
4.5 Ductwork
This coil is designed for a complete supply and return ductwork system.
Do not operate the unit without all ductwork completed.
Do not operate this product without all ductwork attached.
Inadequate ductwork that restricts airflow can result in improper performance and
compressor or heater failure. Ductwork is to be constructed in a manner that limits
restrictions and maintains suitable air velocity. Ductwork is to be sealed to the unit in a
manner that will prevent leakage.
Return ductwork: Do not terminate the return ductwork in an area that can
introduce toxic or objectionable fumes/odors into the ductwork. The return ductwork is
to be introduced into the coil.
Return Air Filters: Each installation must include a return air filter. This filtering may
be performed at the coil or externally such as a return air filter grille.
4.6 Unit Installation
Risk of explosion or fire.
Can cause injury or death.
Install the furnace or blower and condensing unit according to the installation
instructions provided with the unit.
Position the cased coil on top of the furnace or blower cabinet and secure it using
field-provided screws.
NOTE: If the coil is to be installed on an oil furnace, it may be necessary to install a
field-installed transition between the furnace and the coil to prevent airflow restriction
and possible damage to the coil drain pan. See the oil furnace installation instructions
for details.

A-Coil
9
A stable connection is required between the coil and the blower to prevent
dumping.
Based upon the actual conditions, if coil is installed as Fig (A), the coil should be
concealed in a specific room or space and make sure the coil is not accessible to the
general public.
Based upon the actual conditions, if coil is installed as Fig (B), make sure that there
is enough space for care and maintenance. And the coil is not accessible to the general
public.
(A) (B)
Based upon the actual conditions, Multi-Position A-Coils come factory installed
with a vertical and horizontal drain pans and can be configured for upflow or horizontal
pull-through installations.
When the coil matches blower, the side which is nearby from coil is NOT allowed to
install electric heater kit. Recommended configuring is as shown below.
(a) Standard Application: Left hand shown / Right hand similar (not shown)
(b) Counter flow: Right hand shown / Left hand similar (not shown)
(c) Upward flow
(d) Downward flow
(a)

A-Coil
10
(b)
(c) (d)
When the coil matches furnace, temperature of air flow which come from outlet of
furnace must be required a maximum of 200℉. Recommended configuring is as shown
below.
(a) Standard Application: Right hand shown / Left hand similar (not shown)
(b) Counter flow: Left hand shown / Right hand similar (not shown)
(c) Downward flow
(d) Upward flow

A-Coil
11
(a)
(b)
(c) (d)

A-Coil
12
If the air inlet of furnace (or blower) is different with the air outlet of coil in size, it
may be necessary to install a field-installed transition between the furnace (or blower)
and the coil to proper airflow distribution (as shown in figure (a).)
Coil should be pitched slightly toward the drain connection. It is recommended to
add silicone caulk between drain pans to prevent water seepage.
4.7 Sealing Ducts
There must be an airtight seal between the bottom of the furnace
and the return air plenum. Use fiberglass sealing strips, caulking, or equivalent sealing
method between the plenum and the air handler cabinet to ensure a tight seal. Return
air must not be drawn from a room where the air handler or any gas-fueled appliance
(i.e., water heater), or carbon monoxide-producing device (i.e., wood fireplace) is
installed.
Ensure that the duct is secured and all joints are properly sealed to the coil cabinet
flanges.
All indoor cabinets MUST be taped after installation to seal against any air leaks.
System performance and efficiency will be reduced if air leakage exists.
There must be sealed with sponge or other thermal insulation material where
around the cut-off valves to prevent air leakage or water seepage.
It is necessary to paste sponge seal around the air outlet to prevent leakage.
4.8 Leak Testing, Vacuuming and Charging
Refer to the outdoor unit instruction for leak testing, vacuuming and charging.
Always leak check entire system before charging.
When vacuuming, you need to vacuum the liquid and gas pipe at the same time,
and do not open the cut-off valve of coil until vacuum finished.

A-Coil
13
5 Blower Speed Selection
Proper air volume must be provided over the evaporator coil. Select a blower
motor speed tap that will provide 300-450 CFM per 12,000 Btu/h of cooling capacity
(wet coil). Recommended air flow volume as shown in Table 1.
Table 1
Cabinet
Recommended Vol(CFM)
Model
Width(in.)
17.5
800
17.5
1000
24.5
1230
24.5
1510
6 Maintenance and Care
Regular check, maintenance and care should be performed by professional
personnel, which will prolong the unit life span.
6.1 Drain Pipe
Regularly check if the drain pipe is clogged in order to drain condensate smoothly.
6.2 Notice before Seasonal Use
(1) Check if the inlet/outlet of the indoor unit is clogged.
(2) Check if the filter screen has been set soundly.
(3) Check if the unit is installed firmly. If there is something abnormal, please contact
the local appointed service center.
6.3 Maintenance after Seasonal Use
(1) Clean the dust of sundries on the indoor units.
(2) In the event of rusting, use the anti-rust paint to stop spreading of rust.
6.4 Parts Replacement
Purchase parts from local appointed service center or dealer if necessary.
FLEXX24C
FLEXX36C
FLEXX48C
FLEXX60C

A-Coil
14
7 After-Sales Service
In case the air-conditioning unit you bought has any quality problem or you have
any inquiry, please contact the local after-sales service agency designated by factory.
Warranty should meet the following requirements:
(1) First run of the unit should be operated by professional personnel from factory
appointed service center.
(2) Only factory manufactured accessories can be used on the machine.
(3) All the instructions listed in this manual should be followed.
(4) Warranty will be automatically invalid if fails to obey any item mentioned above.

CAT NO: GREE_FLEXX24-60C_INSTALL&OWNERS_09082021
GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI
Add: West Jinji RD, Qianshan, Zhuhai, Guangdong, China, 519070
Tel: [phone]
Fax:[phone]
E-mail: [e-mail]
www.gree.com
U.S. CONTACT INFORMATIONTRADEWINDS, LLC
E-mail: [e-mail]
Contractor Support: 888-850-7928 | Mon-Fri 8 AM - 5 PM EDT
www.greecomfort.com/system-documentation/