Gree UMatch UMAT18HP230V1AC User manual

CEI ING CASSETTE
INSTA ATION MANUA
Models:
Indoor Unit Outdoor Unit
UMAT18HP230V1AC UMAT18HP230V1AO
UMAT24HP230V1AC UMAT24HP230V1AO
UMAT30HP230V1AC UMAT30HP230V1AO
UMAT36HP230V1AC UMAT36HP230V1AO
UMAT42HP230V1AC UMAT42HP230V1AO
UMAT48HP230V1AC UMAT48HP230V1AO

Table of Contents
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Suggested Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
System Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Standard Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation Site Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Indoor Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-12
Outdoor Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Piping Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-17
Power & Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-20
Controller Installation and Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-22
Ceiling Cassette Panel Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Fresh Air Intake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Decorative Grille Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Testing and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-28
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-30
Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31-33
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back
Thank you for choosing a
Ceiling Cassette Ductless
Heat Pump System for your customer.
Please read this installation manual carefully before installing and starting up
the Ceiling Cassette Ductless System. Take a moment to fill out the product and
installation form on the back cover. Retain both the manual and installation
record for future reference.

SAFETY PRECAUTIONS
Please read the following before installation.
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.
This mark indicates procedures which, if improperly performed,
might lead to the death or serious injury of the user.
This mark indicates procedures which, if improperly performed, might
possibly result in personal harm to the user, or damage to property.
Notice is used to address practices not related to personal injury.
General Safety Precautions
1. Instructions for installation and use of this product are provided by the manufacturer.
For proper operation, the system must be installed in accordance with this
installation manual.
2. Installation must be performed in accordance with local laws, regulations and
National Electrical Codes (NEC).
3. If refrigerant leaks while work is being carried out, ventilate the area. Do not allow
refrigerant to come in contact with a flame as it produces toxic gas.
4. Disconnect all electrical power to the indoor and outdoor units until the system is
ready for start-up and checkout.
5. When installing or repairing the system, use only R410A refrigerant. Do not
mix refrigerant with other gases. If air or other gas enter the refrigeration system,
the pressure inside the system may rise to an abnormally high value and cause
damage or injury.
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
WARNING
CAUTION
NOTICE
WARNING
2

Indoor unit
Outdoor unit
NOMENC ATURE
Example: UMAT18HP230V1AC
UMAT 18 1 A O
Series Designation
UMAT – U-Match Series
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
18 - 18,000 BtuH
24 - 24,000 BtuH
30 - 30,000 BtuH
36 - 36,000 BtuH
42 - 42,000 BtuH
48 - 48,000 BtuH
Model Type
AC - Cooling Only
HP - Heat Pump
HC - Heat/Cool
Example: UMAT18HP230V1AO
3

SYSTEM REQUIREMENTS
REFRIGERANT CHARGE
INDOOR UNIT E ECTRICA REQUIREMENTS
PIPE SIZE in (mm)
Notes: Insulate both refrigerant lines, separately.
Communication Cable: Recommended cable - 18/2 AWG stranded bare copper conductors THHN 600V unshielded wire
Note: Use shield cable if installation is in close proximity of RF and EMI transmitting devices.
Unit Size
(BtuH)
18,000 1/4 (6) 1/2 (12) 10 (3) 25(7.5) 66 (20) 49 (15)
24,000 3/8 (10) 5/8 (15) 10 (3) 25(7.5) 98 (30) 49 (15)
30,000 3/8 (10) 5/8 (15) 10 (3) 25(7.5) 98 (30) 49 (15)
36,000 3/8 (10) 5/8 (15) 10 (3) 25(7.5) 98 (30) 49 (15)
42,000 3/8 (10) 5/8 (15) 10 (3) 25(7.5) 164 (50) 98 (30)
48,000 3/8 (10) 5/8 (15) 10 (3) 25(7.5) 164 (50) 98 (30)
Min ine
Max. Pre-Charge
Max ine Max Elevation
ength ine ength ength (ID over OD)
iquid Suction/Gas
ine ine
Unit Size Refrigerant Factory System Additional
(BtuH) Type Charge oz (kg)* Charge oz/ft (g/m)
18,000 R410A 49.4 (1.4) 0.3 (30)
24,000 R410A 78.4 (2.2) 0.6 (60)
30,000 R410A 84.6 (2.4) 0.6 (60)
36,000 R410A 123.2 (3.6) 0.6 (60)
42,000 R410A 131.2 (3.8) 0.6 (60)
48,000 R410A 141.8 (4.1) 0.6 (60)
Unit Size Voltage Min Circuit Max Overcurrent Main Power
(BtuH) Amps (MCA) Protection (MOCP) Wire Size (AWG)
18,000 208/230v - 1ph 60hz 1.0 15 14
24,000 208/230v - 1ph 60hz 1.5 15 14
30,000 208/230v - 1ph 60hz 1.5 15 14
36,000 208/230v - 1ph 60hz 1.5 15 14
42,000 208/230v - 1ph 60hz 1.5 15 14
48,000 208/230v - 1ph 60hz 2.0 15 14
OUTDOOR UNIT E ECTRICA REQUIREMENTS
Unit Size Voltage Min Circuit Max Overcurrent Main Power
(BtuH) Amps (MCA) Protection (MOCP) Wire Size (AWG)
18,000 208/230v - 1ph 60hz 17.0 25 10
24,000 208/230v - 1ph 60hz 24.0 40 10
30,000 208/230v - 1ph 60hz 24.0 40 10
36,000 208/230v - 1ph 60hz 29.0 45 8
42,000 208/230v - 1ph 60hz 31.0 50 8
48,000 208/230v - 1ph 60hz 45.0 70 6
*Precharge amount for up to 25-ft of refrigerant pipe.
REFRIGERANT INE ENGTHS ft (m)
4

• Standard Wrench
• Adjustable/Crescent Wrench
• Torque Wrench
• Hex eys or Allen Wrenches
• Drill & Drill Bits
• Hole Saw
• Pipe Cutter
• Screw drivers (Phillips & Flat blade)
• Manifold and Gauges
• Level
• R410A Flaring Tool
• Clamp on Amp Meter
• Vacuum Pump
• Safety Glasses
• Work Gloves
• Refrigerant Scale
• Micron Gauge
SUGGESTED TOO S
5

SYSTEM PARTS
Indoor unit
Part Name
1. Indoor Power Supply
2. Drain Pipe
3. Communication Cable
4. Decorative Discharge Air
Grille (sold separately)
5. Refrigeration Pipes
6. Wired Tether Controller
(sold separately)
7. Remote Controller
8. Service Cover
9. Communication Cable
10. Front Panel
11. Outdoor Power Supply
12. Liquid Pipe
13. Gas Pipe
14. Drain Hose
Outdoor Unit
Air outlet
Air inlet
1
2
5
4
3
67
6
Air outlet
Air inlet
14 12 1110
The refrigerant pipe, drain pipe and electrical wiring for this unit should be installed by a
qualified HVAC professional only.
CAUTION
98
13

STANDARD PARTS
Indoor Unit Accessories
Outdoor Unit Accessories
No. Name Appearance Qty Usage
1 Drain Hose 1 Connects with field
supplied drain pipe
2 Screw with Washer 4 Secures the hook on the
cabinet of the unit
3 Washer 10 Used together with the hanger
bolt for installing the unit
4 Installation Template 1 Used for ceiling drilling
5 Gasket Mounting Board 4 Prevents gasket from
falling off
6 Remote Controller 1 Remotely controls the
indoor unit
7 Cable Clamp 4 Fastens the insulation to pipe
8 Pipe Insulation 1 Insulates the gas pipe
9 Pipe Insulation 1 Insulates the liquid pipe
10 Insulation 4
Insulates the drain pipe
11 Flare Nut 1 Connects the gas pipe
12 Flare Nut 1 Connects the liquid pipe
13 Service Valve Cap 2 Protects service port
7
No. Name Appearance Qty Usage
1 Drain Plug 2 or 3 Plugs the unused drain hole
2 Drainage Connecter
or 1Connects with the hard
PVC drain pipe

INSTA ATION SITE INSTRUCTIONS
Indoor Unit
The unit must be installed in a location which can withstand four times the weight of the unit.
Inadequate support may result in serious property damage and injuries.
Select a site that allows for the following:
•Ensure the installation complies with the installation minimum dimensions and meets the
minimum and maximum connecting piping length and maximum change in elevation.
• Air inlet and outlet should be clear of obstructions, ensuring proper airflow throughout the room.
• Condensate can be easily and safely drained.
• All connections can be easily made to outdoor unit.
• Indoor unit is out of reach of children.
• A structure strong enough to withstand four (4) times the full weight and vibration of the unit.
• Filter can be easily accessed for cleaning.
• Leave enough free space to allow access for routine maintenance.
• Do not install in a laundry room or by a swimming pool due to chemicals corroding cassette coil.
8
WARNING
Minimum Indoor Clearances

INSTA ATION SITE INSTRUCTIONS
Outdoor Unit
9
Do not install the unit at a location where the distance exceeds the maximum pipe length indicated
in the table. The maximum length of the connection pipe is listed in the System Requirements section.
CAUTION
WARNING
Outdoor Unit Minimum Distances
in (mm)
A 20 (500)
B 20 (500)
C 24 (610)
D 12 (305)
E 12 (305)
Air inlet
Air outlet
A
BC D
E
The unit should be installed level on a pad that can support twice the weight of the unit.
If the outdoor unit will be exposed to strong winds, it must be adequately secured.
1. I
nstall the outdoor unit at a location that is capable of withstanding twice the weight of the unit.
2. Install the outdoor unit where it is convenient to connect refrigerant lines to the indoor unit.
3. I nstall the outdoor unit where the condensate water can be drained unobstructed during the
heating mode to a safe location.
4. Do not locate the unit where the noise may be objectionable to neighbors.
5. Provide the space shown below, so that the air flow is not blocked and future service and
maintenance can be performed.
Select a site that allows the following:
Minimum Outdoor Clearances

Model AB C DE F GH I
UMAT24HP230V1AC 37-3/8 32-3/4 30-3/4 26-3/4 6-1/4 9-1/2 36-1/8 8-1/2 39-1/8
(949) (832) (781) (679) (159) (241) (918) (216) (994)
UMAT30HP230V1AC 37-3/8 32-3/4 30-3/4 26-3/4 6-1/4 9-1/2 36-1/8 8-1/2 39-1/8
(949) (832) (781) (679) (159) (241) (918) (216) (994)
UMAT36HP230V1AC 37-3/8 32-3/4 30-3/4 26-3/4 6-1/4 9-1/2 36-1/8 8-1/2 39-1/8
(949) (832) (781) (679) (159) (241) (918) (216) (994)
UMAT42HP230V1AC 37-3/8 32-3/4 30-3/4 26-3/4 6-1/4 9-1/2 36-1/8 8-1/2 39-1/8
(949) (832) (781) (679) (159) (241) (918) (216) (994)
INDOOR UNIT DIMENSIONS in (mm)
10
INDOOR UNIT DIMENSIONS
Model ABCD E FGH I J
UMAT18HP230V1AC 26-3/8 23-1/2 23-1/4 22-5/8 5-3/4 9-1/2 26-1/8 9-1/4 22-5/8 19-7/8
(670) (597) (591) (575) (146) (241) (664) (235) (575) (505)
INDOOR UNIT DIMENSIONS in (mm)
18K Indoor Unit Dimensions
24K-42K Indoor Unit Dimensions

Model ABCDE F
UMAT48HP230V1AC 41 35-7/8 33-1/8 31 6-3/4 11-3/8
(1041) (911) (841) (787) (171) (289)
INDOOR UNIT DIMENSIONS in (mm)
INDOOR UNIT DIMENSIONS
Hanger Bolts Distance 22.5in (570mm)
Hanger Bolts Distance 23.75in (604mm)
Ceiling Center Point
Ceiling Center Point
aying Out Indoor ocation
• Locate the factory supplied installation template included in carton.
• Use the template to make an opening in the ceiling for the ceiling cassette main body.
• Mark the position of the 4 hanger bolts, refrigerant lines and condensate drain pipes.
11
48K Indoor Unit Dimensions

Threaded
Hanger Bolt
Washer
Nut
Washer
Nut
Nut
INDOOR UNIT INSTA ATION
Indoor Unit Hanger Mounting
Depending on the type of ceiling, attach the threaded hanger bolts securely to the support stud. Before
lifting the indoor unit to the installation location, insert the upper nuts, flat washers (with insulation),
flat washers (without insulation), lower nuts and double locking nuts on the threaded hanger bolts.
Lift the Ceiling Cassette main body to the threaded hanger bolts. Insert the unit mounting brackets
between washers and then fasten it securely.
NOTE: The hanger bolts, nuts, and washers are field supplied. Install the washer with
cushion so that the insulation faces downward.
1. Adjust the height of the Indoor Unit main body to align with false ceiling. Be sure to confirm
this, otherwise condensation may form during cooling mode. Adjust mounting nuts as needed.
2. Confirm that the indoor unit main body is level. Adjust mounting nuts as needed.
3. After checking the positioning of the indoor unit main body, tighten the nuts of the hanger
bolts securely to fasten the Indoor Unit main body in place.
Confirm the position of the Indoor Unit:
Installation of Ceiling Cassette
12
Flat washer
Hanging bolt
Nut
Flat washer
Nut

OUTDOOR UNIT INSTA ATION
Condensate Drainage of the Outdoor Unit
The outdoor unit should be installed with a drain pipe to drain condensate water during the heating mode.
1. Insert the drain joint (included) into the selected hole located on the bottom of the base pan
and then connect the drain hose (field supplied) to the drain joint.
2. All other holes must be sealed with plugs (included) to avoid water leaks, except for the drain
pipe mounting hole.
3. Route drain hose to safe location for disposing of condensate water.
Bottom
Drain pipe mounting hole
Drain Joint
Chassis
Bottom
Drain pipe mounting hole
The unit should be located with the unit support feet firmly on the equipment pad.
If the outdoor unit is exposed to wind, it must be properly secured.
WARNING
Model ABCDE
UMAT18HP230V1AO 37-5/8 15-5/8 27-1/2 22 14-1/8
(955) (396) (700) (560) (360)
UMAT24HP230V1AO 38-5/8 16-3/4 31-1/8 24 15-1/2
UMAT30HP230V1AO (980) (427) (790) (610) (395)
UMAT36HP230V1AO 43-5/8 17-3/8 43-1/4 24-7/8 15-3/4
UMAT42HP230V1AO (1107) (440) (1100) (631) (400)
UMAT48HP230V1AO 37-3/4 16-1/4 53-1/8 22-1/2 14-3/4
(958) (412) (1349) (572) (376)
OUTDOOR UNIT DIMENSIONS in (mm)
13

Piping Preparation
1. Do not open service valves or remove protective caps on pipes until instructed by this manual.
2. eep tubing free of dirt, sand, moisture and contaminants.
3. Insulate each refrigerant pipe and condensate hose with minimum 3/8” (10 mm) wall
thermal pipe insulation.
4. Bind refrigerant pipes and communication cable together with cable ties at 12-inch intervals.
5. Include the condensate hose in bundle for exterior portion only.
14
PIPING INSTA ATION
Refrigerant Piping
Drill Hole in Wall
1. Locate and mark proper location for the wall hole.
2. Cut the 2 3/4” wall hole with a 5° to 10°
downward slant to the outdoors.
3. Insert a wall sleeve (field supplied) into hole to
to prevent damage to refrigerant pipes, insulation,
condensate drain hose and wiring.
4. Proper weather proofing of the wall surface and
wall sleeve is essential to assure a trouble-free
installation. Apply sealant, caulking or equivalent weather proofing material
around the perimeter of the wall sleeve (interior & exterior) to eliminate outdoor air and
water leaks into the indoor space.
NOTE: Expandable foam insulation may be added to fill large wall gaps. Apply per
manufacturer's instructions.
Seal Hole
Hole Size
Indoor Outdoor
Wall Hole Diagram
Oil return bend
Indoor
Outdoor
20 ft.
Oil return bend
Indoor Unit below Outdoor Unit Application
When height difference between indoor unit and outdoor
unit is more than 30 feet, an oil return bend should be added
for every 20 feet of connection pipe as shown.
Wall
Hole Sleeve
Insulate entire interior section of condensate hose to prevent sweating which may cause water
stains or wall damage.
CAUTION

15
PIPING INSTA ATION
Indoor Unit Pipe Connections
1. Feed refrigerant pipes, drain hose and communication cable assembly through wall hole
from outdoor to the Ceiling Cassette.
2. Pull the piping assembly to the indoor unit. Carefully bend refrigerant pipes to meet indoor
unit connection ports. Use proper tools to avoid kinks.
3. Add a small amount of refrigerant oil to
both ends of the flare fittings.
4. Starting with either refrigerant pipe, carefully
center the pipe to the indoor unit connection
port then hand tighten the flare nut.
5. Repeat procedure with remaining pipe.
6. Tighten both flare nuts using a standard wrench and a torque wrench as shown below.
7. Carefully tighten flare nuts to correct torque level referring to the Torque Table below.
8. Individually insulate each bare refrigerant pipe and joint as shown below to prevent sweating.
Pipe Diameter Nut Size Tightening Torque
inch (mm) inch (mm) ft-lbs N-m
1/4 (6.35) 1/4 (17) 10 to 13 14 to 18
3/8 (9.5) 3/8 (22) 25 to 30 34 to 42
1/2 (12.7) 1/2 (25) 36 to 45 49 to 61
5/8 (15.9) 5/8 (29) 50 to 60 68 to 82
Liquid pipe
Gas pipe
Front outlet
Insulate pipe connection
Insulate pipe
Insulate pipe
2
Reference A:
Cover this portion with insulation
Pipe insulation
Over tightening may damage flare connections and cause leaks.
CAUTION
Copper
piping
Oil applied
(to reduce friction
wit t e flare nut)
Flare nut Oil applied
(improves seal
air-tig tness)
90
90
Holding spanner
Torque wrenc
Ceiling Cassette Unit

PIPING INSTA ATION
Outdoor Unit Pipe Connections
16
1. Remove service valve cover (if provided) to access
the service valves and refrigerant ports.
2. Carefully bend and adjust length of refrigerant pipes
to meet outdoor unit service valve connections
with proper tools to avoid kinks.
3. Add a small amount of refrigerant oil to both ends
of the flare fittings.
4. Starting with either refrigerant pipe, carefully
center the pipe to the indoor unit connection
port then hand tighten the flare nut.
5. Repeat procedure with remaining pipe.
6.
Tighten both flare nuts using a standard wrench
and a torque wrench as shown.
7. Carefully tighten flare nuts to correct torque level referring to the Torque Table below.
Pipe Diameter Nut Size Tightening Torque
inch (mm) inch (mm) ft-lbs N-m
1/4 (6.35) 1/4 (17) 10 to 13 14 to 18
3/8 (9.5) 3/8 (22) 25 to 30 34 to 42
1/2 (12.7) 1/2 (25) 36 to 45 49 to 61
5/8 (15.9) 5/8 (29) 50 to 60 68 to 82
Copper
piping
Oil applied
(to reduce friction
wit t e flare nut)
Flare nut Oil applied
(improves seal
air-tig tness)
Over tightening may damage flare connections and cause leaks.
CAUTION
Gas pipe
3-way valve
R
2-way valve
Liquid pipe
or
Pipe
coupling
Service
Valve Cover
Service
Valve Cover
90

17
PIPING INSTA ATION
Indoor Condensate Drain Piping
Observe all local sanitary codes when installing condensate drains.
WARNING
It is recommended to install the condensate drain system with hard polyvinyl chloride (PVC) pipe
and matching connectors. Use piping of the same diameter as the unit connection, or of the same
diameter of the raising section.
The Ceiling Cassette drainage port diameter is 1-in (25 mm) OD.
Pitch the condensate drain pipe at a gradual 2.5% pitch (Example: ¼-in drop over a 10-in length)
without obstructions. Use pipe hanger/brackets to support the condensate drain pipe from dropping.
If a gradual pitch from the drainage port is not obtainable, the Ceiling Cassette contains an internal
condensate drain pump with limited head or lift. The condensate drain pipe may have a vertical
height of 39-in. maximum above the unit drainage port within the first 12-in as long as the remaining
condensate drain pipe gradually descends from that point and is aligned with drainage port.
NOTE: Insulate condensate hose and/or pipes to prevent sweating which may cause
water stains or wall damage.
Ceiling Hangers
Wall
Ceiling
C
Hangers
Wall
39-in
max
12-in
max
Sealed
Drain
pipe
Clamps
Completing Condensate Drainage Piping
•Include the exterior section of condensate hose in the
pipe/wire bundle.
•Fasten the refrigerant and condensate pipe assembly to
the exterior wall for support.
•The drain pipe should terminate 6 inches above grade.
Use an auxiliary condensate pump with float valve for vertical height greater than 39-in. above the unit
drainage port. A float valve is recommended to shut off the system if the auxiliary pump fails.
Typical Drainage System Vertical ift Drainage System

POWER AND WIRING INSTA ATION
WARNING
1. Before obtaining access to terminals, all electrical supply circuits must be disconnected.
2. Always use an independent circuit and provide an independent circuit breaker to supply
power to the system.
3. Use a circuit breaker with adequate capacity to meet the requirements of the total system.
4. All circuit breakers or fuses for the indoor and outdoor units should be installed per the
National Electric Code (NEC) and local regulations.
5. Electrical wiring must be completed in accordance with NEC, local laws, and regulations
of the electric company so that the system will operate properly.
6. Provide a GFI circuit breaker at the electrical panel in accordance with the NEC and the
local electrical company standards.
7. Connect the power supply firmly to the terminal block. Improper installation may
cause a fire.
CAUTION
1. The main power supplies are high-voltage, while the communication wire and the Tether
Controller are low-voltage. They should be installed separately to avoid electromagnetic
interference.
2. High-voltage and low-voltage lines should pass through separate rubber rings at electric
box covers.
3. If the indoor unit communication wire (to the outdoor unit) and power wire are connected
incorrectly, the air conditioner may be damaged.
4. Ground both indoor unit and outdoor unit to earth ground in accordance with the applicable
local and national codes.
18

19
Electric Wiring Between Indoor Unit and Outdoor Unit
Indoor Unit Electrical Wiring
Locate and remove the electrical box cover to access wire terminals.
Single-phase units
(18 ~48 )
POWER AND WIRING INSTA ATION
G
Power: Power:
Wired
Controller
H1H1
H2H2
G
X1X1 XX22
Indoor Communication Wiring
The recommended communication cable size is a minimum 18/2
AWG stranded bare copper conductors THHN 600V unshielded
wire. Use shielded cable if installation is in close proximity of RF
and EMI transmitting devices. Locate wire terminals #1 and #2.
Connect communication cable from outdoor unit to terminals
#1 and #2. Secure cable inside wire clamp/strain relief. Verify
cable is secure, not loose and no external force on wires affects
the connections at the terminals.
Indoor Unit Power Wiring
Locate wire terminals L1 and L2. Connect main electrical power
outdoor unit to terminals L1 and L2. Connect ground wire to
grounding screw. Secure electrical wires inside wire clamp/strain
relief. Verify wires are secure, not loose and no external force on
wires affects the connections at the terminals.
NOTE: Record wire colors and terminal references for use
with Outdoor Unit wire connections.
Typical Wiring Diagram
48
Communication
terminal board
Communication
terminal board
Power supply
terminal board
Electric
box cover
Electric
box cover
18 ~42