Gree MULTI18HP230V1BO User manual

Models:
MULTI18 P230V1BO
MULTI24 P230V1BO
MULTI30 P230V1BO
MULTI36 P230V1BO
MULTI42 P230V1BO
DUCTLESS INVERTER HEAT PU P
INSTALLATION ANUAL

Table of Contents
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Suggested Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation Site Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -7
Crown Indoor Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Terra Indoor Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 -10
Vireo Indoor Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-12
Indoor Unit Installation – Piping Design and Layout . . . . . . . . . . . . . . . . . 13-15
Outdoor Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-18
Indoor Unit Installation – Mounting Bracket and Refrigerant Piping . . . . . 19-20
Piping Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-26
Power and Wiring Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27-31
Testing and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32-33
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35-36
Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37-40
Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back
Thank you for choosing a
Ductless Heat Pump
for your customer.
Please read this installation manual carefully before installing and starting up the
Multi21 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

Outdoor Unit
NO ENCLATURE
3

SYSTE REQUIRE ENTS
REFRIGERANT CHARGE
ELECTRICAL REQUIRE ENTS
Notes: 1) System must be on a single dedicated circuit.
2) Main power is supplied to the outdoor unit.
3) Use table above to size over current protection.
4) Follow all local building codes and NEC (National Electrical Code) regulations.
Interconnecting Cable: Recommended cable - 14/4 AWG stranded bare copper conductors T N 600V unshielded wire
Note: Use shield cable if installation is in close proximity of RF and EMI transmitting devices.
Unit Size (BtuH) Liquid Line
in(mm) Suction/Gas Line in(mm)
18,000 Port A 1/4 (6) 3/8 (9.5)
Port B 1/4 (6) 3/8 (9.5)
Port A 1/4 (6) 3/8 (9.5)
24,000 Port B 1/4 (6) 3/8 (9.5)
Port C 1/4 (6) 3/8 (9.5)
Port A 1/4 (6) 3/8 (9.5)
30,000 Port B 1/4 (6) 3/8 (9.5)
Port C 1/4 (6) 3/8 (9.5)
Port D 1/4 (6) 3/8 (9.5)
Port A 1/4 (6) 3/8 (9.5)
36,000 Port B 1/4 (6) 3/8 (9.5)
Port C 1/4 (6) 3/8 (9.5)
Port D 1/4 (6) 3/8 (9.5)
Port E 1/4 (6) 3/8 (9.5)
Port A 1/4 (6) 3/8 (9.5)
Port B 1/4 (6) 3/8 (9.5)
42,000 Port C 1/4 (6) 3/8 (9.5)
Port D 1/4 (6) 3/8 (9.5)
Port E 1/4 (6) 3/8 (9.5)
Unit Size ax Total Pipe in Equivalent ax Equivalent ax Elev btwn ax Elev btwn
(BtuH) Length ft(m) Pipe Length ft(m) Pipe Length ft(m) IND Units ft(m) IND& OTDUnits ft(m)
18,000 65 (20) 10 (3) 33 (10) 33 (10) 33 (10)
24,000 197 (60) 10 (3) 65 (20) 33 (10) 33 (10)
30,000 230 (70) 10 (3) 82 (25) 25 (7.5) 49 (15)
36,000 246 (75) 10 (3) 82 (25) 25 (7.5) 49 (15)
42,000 246 (75) 10 (3) 82 (25) 25 (7.5) 49 (15)
Unit Size Voltage in Circuit ax Overcurrent ain Power
(BtuH) Amps ( CA) Protection ( OP) Wire Size (AWG)**
18,000 208/230v - 1ph 60hz 15 25 12
24,000 208/230v - 1ph 60hz 21 35 8
30,000 208/230v - 1ph 60hz 19 30 10
36,000 208/230v - 1ph 60hz 21 35 8
42,000 208/230v - 1ph 60hz 24 40 8
**Main power wire from electrical panel to outdoor unit. AWG based on 240VAC Single Phase, 100 ft. distance 1-way, max. 5% allowable voltage drop.
REFRIGERANT PIPE LENGTHS
Unit Size Refrigerant Factory System ax Pipe Length w/out Additional
(BtuH) Type Charge oz(kg) adding Refrig ft(m) Charge oz/ft (g/m)
18,000 R-410A 56.5 (1.6) 33 (10) 0.2 (20)
24,000 R-410A 77.6 (2.2) 98 (30) 0.2 (20)
30,000 R-410A 98.7 (2.8) 131 (40) 0.2 (20)
36,000 R-410A 128.8 (3.65) 131 (40) 0.2 (20)
42,000 R-410A 128.8 (3.65) 131 (40) 0.2 (20)
4

• Standard Wrench
• Adjustable/Crescent Wrench
• Torque Wrench
• ex Keys or Allen Wrenches
• Drill & Drill Bits
• ole 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 TOOLS
5

INSTALLATION SITE INSTRUCTIONS
Indoor Unit
Select a site that allows for the following:
1. Ensure the installation complies with the installation minimum dimensions (defined below)
and meets the minimum and maximum connecting piping length and maximum change in
elevation as defined in the System Requirements section.
2. Air inlet and outlet will be clear of obstructions, ensuring proper airflow throughout the room.
3. Condensate can be easily and safely drained.
4. All connections can be easily made to outdoor unit.
5. Indoor unit is out of reach of children.
6. A mounting structure (i.e. wall, ceiling, floor,...) strong enough to withstand four times the full
weight and vibration of the unit.
7. Filter can be easily accessed for cleaning.
8. Leave enough free space to allow access for routine maintenance.
9. Install at least 10 ft. (3 m) away from the antenna of TV set or radio. Operation of the air
conditioner may interfere with radio or TV reception in areas where reception is weak.
An amplifier may be required for the affected device.
10. Do not install in a laundry room or by a swimming pool due to the corrosive environment.
inimum Indoor Clearances - High Wall Units
NOTE: For minimum clearances of other indoor unit types, refer to
the Installation Instructions enclosed with those indoor units.
6 in
(0.15m)
6 in
(0.15m)
6 ft (1.8m)
6 in (0.15m)
Ceiling
Floor
6

Air inlet
Air outlet
20 in
(0.5 m) 20 in
(0.5 m)
39 in
(1.0m) 20 in
(0.5 m)
78 in
(2.0 m)
1. Install 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 units.
3. Install 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.
Outdoor Unit
INSTALLATION SITE INSTRUCTIONS
Select a site that allows the following:
Air inlet
Air outlet
inimum Outdoor Clearances
7
12 in
(0.3 m) 20 in
(0.5 m)
20 in
(.05 m) 12 in
(0.3 m)
78 in
(2.0 m)
18K and 24K Unit
30K, 36K and 42K Unit

PIPE SIZE – in(mm)
Unit Size (BtuH) Liquid Line Suction/Gas Line
9,000 1/4 (6) 1/2 (12)
12,000 1/4 (6) 1/2 (12)
18,000 1/4 (6) 5/8 (16)
CROWN INDOOR UNIT INSTALLATION
odel ABC
CROWN09 P230V1A 37.8 (960) 12.6 (320) 8.1 (205)
CROWN12 P230V1A 37.8 (960) 12.6 (320) 8.1 (205)
CROWN18 P230V1A 37.8 (960) 12.6 (320) 8.1 (205)
31/2 27 7 3/8
3 1/8
2
INDOOR UNIT DI ENSIONS – in(mm)
Crown Unit ounting Bracket Diagram (inches)
9K, 12K and
18K Unit
Crown
8
AC
B
3.5 27.0 7.1
3.1
2.0
Left Right
(Rear piping hole) (Rear piping hole)

TERRA INDOOR UNIT INSTALLATION
odel ABC
TERRA09 P230V1A
34.1 (866) 11.5 (292) 8.2 (208)
TERRA12 P230V1A
34.1 (866) 11.5 (292) 8.2 (208)
TERRA18 P230V1B
40.1 (1018) 12.6 (319) 9.1 (231)
TERRA24 P230V1B
46.4 (1178) 12.8 (325) 10.4 (264)
PIPE SIZE – in(mm)
Unit Size (BtuH) Liquid Line Suction/Gas Line
9,000 1/4 (6) 1/2 (12)
12,000 1/4 (6) 1/2 (12)
18,000 1/4 (6) 5/8 (16)
24,000 1/4 (6) 5/8 (16)
INDOOR UNIT DI ENSIONS – in(mm)
9
AC
B
Terra

TERRA INDOOR UNIT INSTALLATION
Terra Unit ounting Bracket Diagrams (inches)
9K and 12K Unit
18K Unit
24K Unit
Left Right
(Rear piping hole) (Rear piping hole)
Left Right
(Rear piping hole)
Left
(Rear piping hole)
(Rear piping hole)
Right
(Rear piping hole)
10

VIREO INDOOR UNIT INSTALLATION
B
C
A
11
odel ABC
VIR09 P230V1A 33.4 (848) 11.4 (290) 8.2 (208)
VIR12 P230V1A 33.4 (848) 11.4 (290) 8.2 (208)
VIR18 P230V1A 38.2 (970) 11.8 (300) 8.8 (224)
VIR24 P230V1A 42.4 (1077) 12.8 (325) 9.7 (246)
PIPE SIZE – in(mm)
Unit Size (BtuH) Liquid Line Suction/Gas Line
9,000 1/4 (6) 3/8 (9)
12,000 1/4 (6) 1/2 (12)
18,000 1/4 (6) 1/2 (12)
24,000 1/4 (6) 5/8 (16)
INDOOR UNIT DI ENSIONS – in(mm)
Vireo

Vireo Unit ounting Bracket Diagrams (inches)
VIREO INDOOR UNIT INSTALLATION
9K and 12K Unit
18K Unit
24K Unit
4.6 21.4 7.3
4 27 7.3
8.1 27
6.0 3.1
7.4
1.4
1.4
1.5
7.5 5.5
1.5
1.6 1.6
2.3 2.3
2.3 2.3
2.8
2.8
12
Left
Right
(Rear piping hole)
(Rear piping hole)
Right
(Rear piping hole)
Right
(Rear piping hole)
Left
(Rear piping hole)
Left
(Rear piping hole)

Piping Design and Layout
The piping design and layout are critical factors for the overall performance and reliability of the
system. Find the desired locations for each indoor unit and the outdoor unit. Then measure and
record the piping lengths and heights as directed below to qualify the piping design and layout.
First, measure and record the piping length (L1,L2, L3….Ln) from the outdoor unit to each indoor unit.
NOTE: Min. refrigerant line length between the indoor and outdoor units is 10 ft. (3 m).
L1=
L2=
L3=
L4=
L5=
Second, find the indoor units with the greatest vertical distance from the outdoor unit. Measure the maximum
vertical height ( 1) from the bottom of the outdoor unit to the bottom of the highest mounted indoor units.
1=
Third, find the two indoor units with the greatest vertical distance from each other. Measure the maximum
vertical height ( 2) between those two indoor units from bottom of one unit to bottom of the other unit.
2=
INDOOR UNIT INSTALLATION
L2
Ln
L1
H1
H2
13

Piping Length Requirements
The system piping layout must take in the constraints of horizontal length on system performance.
The outdoor unit has a length limit in which it can properly circulate refrigerant in the system.
Capacity Size (BtuH) Distance ft (m)
18,000 33 (10)
24,000 65 (20)
30,000 82 (25)
36,000 82 (25)
42,000 82 (25)
Capacity Size (BtuH) Distance ft (m)
18,000 65 (20)
24,000 197 (60)
30,000 230 (70)
36,000 246 (75)
42,000 246 (75)
The maximum equivalent pipe length from the outdoor
to the farthest indoor units (LS) must be less than:
Verify your LS and LT maximum piping length measurements are less than the system limits.
The maximum total pipe length making
up the system (LT) must be less than:
INDOOR UNIT INSTALLATION
L=L1 L2
++ +
L
S
...Ln
14

Piping Height Requirements
The system piping layout must take in the constraints of vertical height on system performance.
The outdoor unit has a vertical height limit in which it can properly circulate refrigerant in the system.
INDOOR UNIT INSTALLATION
Capacity Size (BtuH) Distance ft (m)
18,000 33 (10)
24,000 33 (10)
30,000 49 (15)
36,000 49 (15)
42,000 49 (15)
Capacity Size (BtuH) Distance ft (m)
18,000 33 (10)
24,000 33 (10)
30,000 25 (7.5)
36,000 25 (7.5)
42,000 25 (7.5)
The maximum elevation ( 1) from the bottom
of the outdoor unit to the bottom of the highest
mounted indoor units must be less than:
The maximum elevation ( 2) between those
two indoor units from bottom of one unit to
bottom of the other unit must be less than:
Verify your 1 and 2 maximum elevation measurements are less than the system limits.
L2 L3 ...Ln
H1
H2
15
Oil return bend
Indoor
Outdoor
20 ft.
Oil return bend
Oil Return Bend
When the outdoor unit is more than 30 feet above the
indoor unit, an oil return bend must be added for every
20 feet of connection pipe.

OUTDOOR UNIT INSTALLATION
18K Unit
24K Unit
Outdoor Unit Dimensions
16
35.1
38.0
22.0
35.1
22.0
13.4
17.3
38.6
13.4
15.6
27.6
31.1
14.5
14.5

OUTDOOR UNIT INSTALLATION
30K Unit
36K and 42K Unit
Outdoor Unit Dimensions
17
36.2 14.6
17.3
38.4
24.0
40.0 14.3
43.4
17.3
14.8
42.5
24.8
31.0
15.7

Install Ground Pad or Wall Hangers
1. Determine proper location for outdoor unit.
2. Follow all instructions provided by manufacturer for installing wall hangers or ground pad.
3. Verify the wall hangers or ground pad can safely support the weight of the outdoor unit.
4. Verify the wall hangers or ground pad is level and meets all outdoor dimensional clearances.
Install Outdoor Unit Risers
If the outdoor unit requires added elevation above the ground, installing riser legs will provide
a sturdy and stable solution. Follow all instructions provided by manufacturer for installing
riser legs to outdoor unit.
NOTE: Riser legs will also help absorb vibrations and noise while facilitating proper drainage.
Install Condensate Drain for Outdoor Unit
During normal heating and defrost operation,
the outdoor unit will generate condensate water.
The condensate water should be routed to a safe
location through the drain hose.
1. Locate drain hole on bottom of outdoor unit.
2. Install the outdoor drain fitting into hole on
the bottom of outdoor unit as shown.
3. Connect the drain hose to drain fitting.
4. Route drain hose to safe location for proper
drainage of excess condensate water.
5. Plug the remaining drain holes in basepan with
plugs provided from factory.
OUTDOOR UNIT INSTALLATION
Drain Fitting Installation
18

INDOOR UNIT INSTALLATION
Install ounting Bracket
1. Attach the mounting bracket to the indoor unit.
2. Find the horizontal center of the indoor unit.
3. Mark the center of the indoor unit on mounting bracket for future reference.
NOTE: The center of the mounting bracket is not the center of the indoor unit.
4. Remove the mounting brackets from the indoor unit and position the mounting
bracket on the wall in desired location. Use centering mark on mounting bracket
for centering the indoor unit on the wall.
5. Mounting bracket must be installed horizontally and level right to left.
NOTE: Condensate drain pan has built-in pitch for proper drainage.
6. Secure mounting bracket to wall with a minimum of five screws, evenly spaced to
properly support indoor unit weight.
NOTE: It is recommended to install screw anchors for sheet rock, concrete block,
brick and such type of walls.
NOTE: For mounting and installation of other indoor unit types, refer
to the Installation Instructions enclosed with those indoor units.
High Wall Indoor Installation
19