Carrier 38MGQ Series User manual

38MGQ / 40MAQ / 40MBC / 40MBD / 40MBF
Multi---Zone Ductless System
Sizes 18K, 24K, 30K, 36K and 48K
Installation Instructions
NOTE: Read the entire instruction manual before starting the installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 2.........................
GENERAL 2.........................................
PIPING REQUIREMENTS 3............................
ELECTRICAL DATA 4................................
DIMENSIONS 6--12...................................
CLEARANCES 13--15.................................
INSTALLATION GUIDE 16.............................
INSTALLATION TIPS 16...............................
HIGH WALL INDOOR UNIT INSTALLATION 16...........
CASSETTE INDOOR UNIT INSTALLATION 18............
INDOOR UNIT MAIN BODY INSTALLATION 18..........
INDOOR UNIT INSTALLATION 19......................
DUCTED INDOOR UNITS INSTALLATION 24............
FAN PERFORMANCES (DUCTED UNITS) 28.............
FLOOR CONSOLE INDOOR UNIT INSTALLATION 30.....
INSTALLING THE INDOOR UNIT 31....................
OUTDOOR UNIT INSTALLATION 32....................
START--UP 35........................................
CONNECTION DIAGRAMS 36.........................
OUTDOOR UNIT DIAGNOSTIC GUIDES 38..............

2
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air--conditioning equipment
can be hazardous due to system pressures, electrical components,
and equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should
install, start--up, and service this equipment.
Untrained personnel can perform basic maintenance functions such
as cleaning coils. All other operations should be performed by
trained service personnel.
When working on the equipment, observe precautions in the
literature and on tags, stickers, and labels attached to the
equipment.
Follow all safety codes. Wear safety glasses and work gloves. Keep
quenching cloth and fire extinguisher nearby when brazing. Use
care in handling, rigging, and setting bulky equipment.
Read these instructions thoroughly and follow all warnings or
cautions included in literature and attached to the unit. Consult
local building codes and current editions of the National Electrical
Code ( NEC ) NFPA 70. In Canada, refer to current editions of the
Canadian electrical code CSA 22.1.
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, and CAUTION.
These words are used with the safety--alert symbol. DANGER
identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards which could
result in personal injury or death. CAUTION is used to identify
unsafe practices which may result in minor personal injury or
product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability, or
operation.
!WARNING
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.
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant pipe
in the ground. If any section of pipe is buried, there must be
a 6 in. (152 mm) vertical rise to the valve connections on
the outdoor units. If more than the recommended length is
buried, refrigerant may migrate to the cooler buried section
during extended periods of system shutdown. This causes
refrigerant slugging and could possibly damage the
compressor at start--up.
GENERAL
These instructions cover the installation, start--up and servicing of the
multi--zone outdoor unit connected to up to five indoor fan coil units.
For approved combinations, please refer to the Product Data.

3
PIPING REQUIREMENTS
IMPORTANT:Both refrigerant lines must be insulated separately.
The minimum refrigerant line length between the indoor and outdoor units is 10 ft. (3 m). The following lengths are allowed.
Table 1—Piping Lengths
System size 18K 27K 36K 48K
Piping
Min. Piping Length per each indoor unit ft (m) 10 (3) 10 (3) 10 (3) 10 (3)
Standard Piping Length per each indoor unit ft (m) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5)
Max. outdoor---indoor height difference
(OU higher than IU) ft (m) 32(10) 32(10) 32(10) 32(10)
Max. outdoor---indoor height difference
(IU higher than OU) ft (m) 49(15) 49(15) 49(15) 49(15)
Max. height different between indoor units ft (m) 32(10) 32(10) 32(10) 32(10)
Max. Length per each indoor unit ft (m) 66(20) 82(25) 98(30) 98(30)
Max. Piping Length with no additional
refrigerant charge per System (Standard Piping
length x No. of Zones)
ft (m) 49(15) 74(22.5) 98(30) 123(37.5)
Total Maximum Piping Length per system Ft. (m) 98(30) 147(45) 196(60) 245(75)
Additional refrigerant charge
(between Standard – Max piping length) Oz/ft (g/m) 0.16(15) 0.16(15) 0.16(15) 0.16(15)
Gas Pipe Size in (mm) 3/8*2 (9.52*2) 3/8*2 (9.52*3) 1/2 *1 (12.7*1)
+ 3/8*3 (9.5*3)
1/2 *2 (12.7*2)
+ 3/8*3 (9.5*3)
Refrigerant
Liquid Pipe Size in (mm) 1/4 *2 (6.35*2) 1/4 *3 (6.35*3) 1/4 *4 (6.35*4) 1/4 *5 (6.35*5)
Refrigerant Type R410A R410A R410A R410A
Charge Amount Lbs (kg) 4.19 (1.9) 6.17 (2.8) 7.94 (3.6) 10.14 (4.6)
NOTE:The refrigerant charge included is adequate for the number of zones multiplied by the maximum piping length per zone with no additional
refrigerant.
Table 2—Indoor High Wall
Indoor High Wall
SIZE 912 18 24
Pipe Connection Size --- Liquid in. 1/4” 1/4” 1/4” 3/8”
Pipe Connection Size --- Suction in. 3/8” 1/2” 1/2” 5/8”
Table 3—Indoor Cassette
Indoor Cassette
SIZE 912 18
Pipe Connection Size --- Liquid in. 1/4” 1/4” 1/4”
Pipe Connection Size --- Suction in. 3/8” 1/2” 1/2”
Table 4—Indoor Ducted
Indoor Ducted
SIZE 912 18 24
Pipe Connection Size --- Liquid in. 1/4” 1/4” 1/4” 3/8”
Pipe Connection Size --- Suction in. 3/8” 1/2” 1/2” 5/8”
Table 5—Indoor Floor Console
Indoor Floor Console
SIZE 912
Pipe Connection Size --- Liquid in. 1/4” 1/4”
Pipe Connection Size --- Suction in. 3/8” 1/2”
Refrigerant Piping:
Line sets to be sized based on the connection size of the indoor unit. Each pipe should be insulated individually.
Conversion Joints:
The outdoor unit may include a package of conversion joints to facilitate installation of various sizes of fan coils. These joints are to be
connected to the outdoor unit as needed to match the line set size.
Table 6—Conversion Joints
NUMBER OF ZONES SIZE ADAPTOR QUANTITY
2zone 18 3/8”--- ---1/2” 2
3zone 27 3/8”--- ---1/2” 3
4zone 36 3/8” --- ---1/2” 3
1/2”--- ---3/8” 1
5zone 48
1/2”--- ---3/8” 2
1/4”--- ---3/8” 2
1/2”--- ---5/8” 2
3/8”--- ---1/2” 3
Table 7—Additional Refrigerant Charge
Unit Size Number of Zones Charge oz. (kg.) Additional Charge Required
After ft. (m)
Additional Charge
oz./ft. (g/m)
Total Max im um Pip-
ing Length ft. (m.)
18 267.02 (1.9) 49 (15) 0.16 (15) 98 (30)
27 398.76 (2.8) 74 (22.5) 0.16 (15) 147 (45)
36 4126.98 (3.6) 98 (30) 0.16 (15) 196 (60)
48 5162.26 (4.6) 123 (37.5) 0.16 (15) 245 (75)
Additional Refrigerant Calculation
Sum Total Liquid Pipe ft. (m) --- Additional Charge Required After ft. (m.) x Additional Charge oz./ft. (g/m) 0.16 (15)
NOTES:
If the calculation results in a negative number no additional refrigerant is required.
ELECTRONIC EXPANSION VALVES IN THE OUTDOOR UNIT ARE USED AS METERING DEVICES.

4
ELECTRICAL DATA
Table 8—High Wall
UNIT SIZE SYSTEM VOLTAGE OPERATING VOLTAGE INDOOR FAN
VOLT/PHASE/HZ MAX / MIN V --- P H --- H Z FLA HP W
9
208---230/1/60 253 / 187 208---230/1/60
0.07 0.027 20
12 0.07 0.027 20
18 0.17 0.077 58
24 0.23 0.08 60
30 0.23 0.08 60
Table 9—Ducted
UNIT SIZE SYSTEM VOLTAGE OPERATING VOLTAGE INDOOR FAN
VOLT/PHASE/HZ MAX / MIN FLA HP W
9
208--- 230/1/60 253 / 187
1.03 0.073 55
12 1.03 0.073 55
18 0.83 0.12 90
24 0.83 0.12 90
36 1.263 0.2 150
48 2.23 0.32 240
Table 10—Cassette
UNIT SIZE SYSTEM VOLTAGE OPERATING VOLTAGE INDOOR FAN
VOLT/PHASE/HZ MAX / MIN V --- P H --- H Z FLA HP W
9
208---230/1/60 253 / 187 208---230/1/60
0.146 0.061 46
12 0.146 0.061 46
18 0.146 0.061 46
Table 11—Floor Console
UNIT SIZE SYSTEM VOLTAGE OPERATING VOLTAGE INDOOR FAN
VOLT/PHASE/HZ MAX / MIN V --- P H --- H Z FLA HP W
9208---230/1/60 253 / 187 208---230/1/60 0.21 0.027 20
12 0.21 0.027 20
Table 12—Multi Zone Outdoor Unit
UNIT SIZE SYSTEM VOLTAGE OPERATING VOLTAGE COMPRESSOR OUTDOOR FAN MCA
MAX
FUSE/CB
AMP
VOLT/PHASE/HZ MAX / MIN RLA FLA HP W
18
208---230/1/60 253 / 187
9.7 30.16 50 15 20
27 8.85 30.16 120 19 25
36 13.4 30.16 120 27 40
48 13.5 30.11 85 29 50
*Permissible limits of the voltage range at which the unit will operate satisfactorily.
LEGEND
FLA - Full Load Amps
LRA - Locked Rotor Amps
MCA - Minimum Circuit Amps
RLA - Rated Load Amps

5
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
SWires should be sized based on NEC and local codes.
SUse copper conductors only with a minimum 600 volt .
rating and 2/64--inch thick insulation.
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
SBe sure to comply with local codes while running wire from
indoor unit to outdoor unit.
SEvery wire must be connected firmly. Loose wiring may
cause terminal to overheat or result in unit malfunction. A
fire hazard may also exist. Therefore, be sure all wiring is
tightly connected.
SNo wire should be allowed to touch refrigerant tubing,
compressor or any moving parts.
SDisconnecting means must be provided and shall be located
within sight and readily accessible from the air conditioner.
SConnecting cable with conduit shall be routed through hole
in the conduit panel.
All wires must be sized per NEC (National Electrical Code) or
CEC (Canadian Electrical Code) and local codes. Use the
Electrical Data table MCA (minimum circuit amps) and MOCP
(maximum over current protection) to correctly size the wires and
the disconnect fuse or breakers respectively.
Per the caution note, use only copper conductors with a minimum
600 volt rating and 2/64--inch thick insulation. The use of BX
cable is not recommended.
Recommended Connection Method for Power and
Communication --Wiring -- Power and Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied
14/3 power/communication wiring from the outdoor unit to indoor
unit consists of four (4) wires and provides the power for the
indoor unit. Two wires are high voltage AC power; one is
communication wiring and the other is a ground wire.
Recommended Connection Method for Power and
Communication Wiring (To minimize communication wiring
interference)
Power Wiring:
The main power is supplied to the outdoor unit. The field supplied
power wiring from the outdoor unit to the indoor unit consists of three
(3) wires and provides the power for the indoor unit. Two wires are
high voltage AC power and one is a ground wire. To minimize a
voltage drop, the factory recommended wire size is 14/2 stranded with
a ground.
Communication Wiring:
A separate shielded copper conductor only, with a minimum 600
volt rating and 2/64--inch thick insulation, must be used as the
communication wire from the outdoor unit to the indoor unit.
Please use a separate shielded 16GA stranded control wire.

6
DIMENSIONS -- INDOOR
Fig. 1 --- High Wall Dimensions
Table 13—High Wall Dimensions
UNIT SIZE W In. (mm) D In. (mm) H In. (mm) OPERATING WEIGHT
Lbs. (kg)
9K/12K 32.9(835) 7.8(198) 11.0(280) 19.2(8.7)
18K 39.0(990) 8.6(218) 12.4(315) 26.5(12.0)
24K 46.7(1186) 10.2(258) 13.4(343) 40.8(18.5)
Fig. 2 --- Cassette Dimensions
Table 14—Cassette Dimensions
UNIT SIZE 9K 12K 18K
BODY PANEL BODY PANEL BODY PANEL
Height in(mm) 10.24 (260) 1.97 (50) 10.24 (260) 1.97 (50) 10.24 (260) 1.97 (50)
Width in(mm) 22.44 (570) 25.47 (647) 22.44 (570) 25.47 (647) 22.44 (570) 25.47 (647)
Depth in(mm) 22.44 (570) 25.47 (647) 22.44 (570) 25.47 (647) 22.44 (570) 25.47 (647)
Operating
Weight lbs(kg) 35.27 (16) 5.51 (2.5) 35.27 (16) 5.51 (2.5) 39.68 (18) 5.51 (2.5)

7
DIMENSIONS -- INDOOR (CONTINUED)
Fig. 3 --- Ducted Dimensions
Table 15—Ducted Dimensions
OUTLINE DIMENSIONS
in(mm)
AIR OUTLET
OPENING SIZE
in(mm)
AIR RETURN
OPENING SIZE
in(mm)
HANGAR
BRACKETS
in(mm)
REFRIGERANT PIPE
LOCATIONS
in(mm)
OPERATING
WEIGHT
Lbs. (kg)
in(mm)
SIZE A B C D E F G H I J K L M H1 H2 W1 W2
927.6
(700)
8.2
(210)
25
(635)
22.4
(570)
2.5
(65)
19.4
(493)
1.3
(35)
4.6
(119)
23.4
(595)
7.8
(200)
3.1
(80)
29.1
(740)
13.8
(350)
4.7
(120)
5.6
(143)
3.7
(95)
5.9
(150) 39.90 (18.1)
12 27.6
(700)
8.2
(210)
25
(635)
22.4
(570)
2.5
(65)
19.4
(493)
1.3
(35)
4.6
(119)
23.4
(595)
7.8
(200)
3.1
(80)
29.1
(740)
13.8
(350)
4.7
(120)
5.6
(143)
3.7
(95)
5.9
(150) 39.90 (18.1)
18 36.2
(920)
8.2
(210)
25
(635)
22.4
(570)
2.5
(65)
19.4
(493)
1.3
(35)
4.6
(119)
32.0
(815)
7.8
(200)
3.1
(80)
37.8
(960)
13.8
(350)
4.7
(120)
5.6
(143)
3.7
(95)
5.9
(150)
50.7
(23)
24 36.2
(920)
10.6
(270)
25
(635)
22.4
(570)
2.5
(65)
19.4
(493)
1.3
(35)
7.0
(179)
32.0
(815)
10.2
(260)
0.7
(20)
37.8
(960)
13.8
(350)
4.7
(120)
5.6
(143)
3.7
(95)
5.9
(150)
57.32
(26)

8
DIMENSIONS -- INDOOR (CONTINUED)
Fig. 4 --- Floor Console Dimensions
Table 16—Floor Console Dimensions
UNIT SIZE 912
Height in (mm) 8.27 (210) 8.27 (210)
Width in (mm) 27.56 (700) 27.56 (700)
Depth in (mm) 23.62 (600) 23.62 (600)
Operating Weight Lbs. (kg) 32.41 (14.7) 32.41 (14.7)

9
DIMENSIONS -- OUTDOOR
Table 17— Dimensions
UNIT SIZE 18 27 36 48
Height in (mm) 27.56(700) 31.89(810) 31.89(810) 36.93(1369)
Width in (mm) 33.27(845) 37.20(945) 37.20(945) 53.9(938)
Depth in (mm) 12.60(320) 15.55(395) 15.55(395) 15.43(392)
W e i g h t --- N e t lbs (kg) 114.63(52) 154.76(70.2) 169.75(77) 255.50(115.9)
Fig. 5 --- Outdoor Dimensions Size 18
NOTE:No master valves available on Size 18K.

10
DIMENSIONS -- OUTDOOR (CONTINUED)
Suction
Fig. 6 --- Outdoor Dimensions Size 27

11
DIMENSIONS -- OUTDOOR (CONTINUED)
Suction
Fig. 7 --- Outdoor Dimensions Size 36

12
DIMENSIONS -- OUTDOOR (CONTINUED)
Suction
Fig. 8 --- Outdoor Dimensions Size 48

13
CLEARANCES -- INDOOR
NOTE:Allow sufficient space for airflow and unit servicing. See Fig. 9 through 14 for minimum required clearances.
6 " (0.15m ) min.
5
"
(0.13m)
min.
6'
5 "
(0.13m)
min.
(1.8m)
CEILING
FLOOR
Fig. 9 --- High Wall Clearance
Fig. 10 --- Cassette Unit Clearance

14
CLEARANCES -- INDOOR (CONTINUED)
19.7in
/500mm /100mm
3.9in
/1000mm
39.4in
/250mm
9.8in
/200mm
7.9in
/500mm
19.7in
/3m
9.8ft
Fig. 11 --- Ducted Clearance
Fig. 12 --- Ducted Clearance
Fig. 13 --- Floor Console Clearances

15
CLEARANCES -- OUTDOOR
A
DB
Air-outlet
Air-inlet
C
E
Fig. 14 --- Clearances Outdoor
Table 18— Clearances Outdoor Values
UNIT MINIMUM VALUE
in. (mm)
A24 (609)
B24 (609)
C24 (609)
D4 (101)
E4 (101)

16
INSTALLATION GUIDE
Up to five fan coil units can be connected to one outdoor unit.
Refer to the Product Data for approved combinations.
Ideal installation locations include:
Each Indoor Unit
SA location where there are no obstacles near inlet and outlet area.
SA location which can bear the weight of indoor unit.
SDo not install indoor units near a direct source of heat such as
direct sunlight or a heating appliance.
SA location with the appropriate clearances (see Fig. 9 -- 13).
Outdoor Unit
SA convenient location for the installation that is not exposed to
strong wind. If unit is exposed to strong winds it is recommended
that a field--fabricated wind baffle be used.
SA location which can bear the weight of outdoor unit and where
the outdoor unit can be mounted in a level position.
SA location which provides appropriate clearances (see Fig. 14).
SDo not install the indoor or outdoor units in a location with
special environmental conditions. For those applications, contact
your Sales Representative.
INSTALLATION TIPS
Ideal installation locations include:
Indoor Unit
SA location where there are no obstacles near inlet and outlet area.
SA location which can bear the weight of indoor unit.
SDo not install indoor units near a direct source of heat such as
direct sunlight or a heating appliance.
SA location which provides appropriate clearances as outlined in
Fig. 9 -- 13.
Outdoor Unit
SA location which is convenient to installation and not exposed to
strong wind.
SA location which can bear the weight of the outdoor unit and
where the outdoor unit can be mounted in a level position.
SA location with appropriate clearances as outlined in Fig. 14.
SDo not install the indoor or outdoor units in a location with
special environmental conditions. For those applications, contact
your Ductless Split representative.
HIGH WALL INDOOR UNIT INSTALLATION
INSTALL MOUNTING PLATE
The mounting plate will look like one of the following figures (15
-- 17) depending on the model size:
Fig. 15 --- Mounting Plate -- Model sizes 09, 12
Fig. 16 --- Mounting Plate -- Model size 18
Fig. 17 --- Mounting Plate -- Model sizes 24, 30
1. Carefully remove the mounting plate, which is attached to
the back of the indoor unit.
2. The mounting plate should be located horizontally and level
on the wall. All minimum spacings shown in Fig. 9--13 and
15 should be maintained.
3. If the wall is block, brick, concrete or similar material, drill
.2” (5 mm) diameter holes and insert anchors for the
appropriate mounting screws.
4. Attach the mounting plate to the wall.
DRILL HOLE IN WALL FOR INTERCONNECTING
PIPING, DRAIN AND WIRING
Refrigerant Line Routing
The refrigerant lines may be routed in any of the four directions
shown in Fig. 19.
For maximum serviceability, it is recommended to have refrigerant
line flare connections and the drain connections on the outside of
the wall that the fan coil can be mounted on.
If the piping is going through the back:
1. Use the mounting plate to determine the pipe hole position.
Drill pipe hole diameter per values given in Fig. 15 through
17. The outside pipe hole is 1/2--in. (13 mm) min. lower than
inside pipe hole, so it slants slightly downward (see Fig. 18).
1/2 in. (13 mm)
Min.
INDOOR OUTDOOR
A07371
Fig. 18 --- Drill Holes
If the piping is going through the right or left side:
1. Use a small saw blade to carefully remove the corresponding
plastic covering on the side panel and drill the appropriate size
hole where the pipe is going through the wall.
Pipe holder
Pipe cover
Right piping
Left piping
Pipe cover
Right back piping
Left back piping
12
3
4
A14349
Fig. 19 --- Piping Locations

17
INSTALL ALL POWER, INTERCONNECTING
WIRING, AND PIPING TO INDOOR UNIT
1. Run interconnecting piping and wiring from the outdoor
unit to the indoor unit.
2. Run interconnecting cable through the hole in the wall
(outside to inside).
3. Lift the indoor unit into position and route the piping and the
drain through the hole in the wall (inside to outside). Fit the
interconnecting wiring into the back side of the indoor unit.
4. Put an upper claw at the back of the indoor unit on the
upper hook of the Mounting Plate. Move the indoor unit
from side to side to ensure it is securely hooked.
5. Open the front cover of the indoor unit and remove the field
wiring terminal block cover.
6. Pull the interconnecting wire up from the back of the indoor
unit and position in close to the terminal block on the
indoor unit.
7. Push the lower part of the indoor unit up on the wall, then
move the indoor unit from side to side, up and down to
ensure it is hooked securely (see Fig. 20).
Upper hook
Lower hoo
k
A07347a
Fig. 20 --- Indoor Unit Installation
8. Connect wiring from the outdoor unit per connection
diagram.
9. Replace the field wiring cover and close the front cover of the
indoor unit.
10. Connect the refrigerant piping and the drain line outside of
the indoor unit. Complete the pipe insulation at the flare
connection then fasten piping and wiring to the wall as
required. Completely seal the hole in the wall.
11. Connect the drain line. The drain line must not have a trap
anywhere in its length, must pitch downwards, and must be
insulated up to the outside wall (see Fig. 21).
Proper Do not put drain end into waterDo not form a rise
A14351
Fig. 21 --- Proper Drain Hose Installation
NOTE:For proper orientation of the refrigerant piping,
electrical cable and drain lines, refer to Fig. 22.
Interconnecting
Wiring
Drain Piping
Refrigerant Piping
Tape
Indoor unit
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
.
.
.
.
.
.
.
.
.
.
..
.
A07346
Fig. 22 --- Proper Orientation

18
CASSETTE INDOOR UNIT INSTALLATION
Select install location of the indoor unit
1. Obstructions should be removed from the indoor unit’s intake
or outlet vents so the air can flow throughout the room.
2. Make sure the installation is in accordance with the
requirements of the required clearances on the schematic
diagram.
3. Select a location that can withstand 4 times the weight of
the indoor unit and would not increase the operating noise.
4. Ensure the unit is level.
5. Select a location where condensated coagulated water can
drain easy connect easy with the outdoor unit.
6. Ensure there is enough space for care and maintenance.
Ensure the height between the indoor unit and ground is 
3ft. (1mt) or 16ft (5mt).
7. When installing the steeve bolt, check if the install place can
withstand a weight 4 times of the unit’s. If not, reinforce
before installation. Refer to the install cardboard to
determine where the location should be reinforced.
IMPORTANT: To guarantee the good performance, the unit must
be installed by professional personnel according to this instruction.
25 3/5 in (650 mm)
22 4/9 in (570 mm)
15 3/4 in (400 mm)
)mm075(n
i
9/
4
22
)
mm
406(
n
i
9/7
32
)mm
05
6(ni
5/
35
2
Install dimension of mode
37 2/5 i n (9 50 m m)
37 2/5 in (950 mm)
35 in(8 90 mm)
35 in( 890 mm)
33 in(8 40 mm)
33 in( 84 0 mm )
30 5/7 in (7 80 m m)
26 7/9 in (680 mm)
Fig. 23 --- Dimension of ceiling opening and location of the
hoisting screw (M10)
IMPORTANT: The drilling of holes in the ceiling must be
performed by professional personnel.
20.59in/523 22.44in/570 25.47in/647
21.45in/545
22.44in/570
25.47in/647
Fig. 24 --- Drilling Holes
in/
Fig. 25 --- Drilling Holes
Fig. 26 --- Drilling Holes
NOTE: Installation is possible with a ceiling dimension of 23.62
in. (600m) (marked with *). However to achieve a ceiling--panel
overlapping dimension of 0.59in (15mm), the spacing between the
ceiling and the unit should be 0.79 in. (20mm) or less. If the
spacing between the ceiling and the unit is over 0.79 in. (20mm),
attach sealing material in the part or recover the ceiling.
INDOOR UNIT MAIN BODY INSTALLATION
Installation is possible with a ceiling dimension of 23.62 in.
(600mm) (marked with *). However, to achieve a ceiling--panel
overlapping dimension of 0.59 in. (15 mm), the spacing between
the ceiling and the unit should be 0.79 in. (20mm or less). If the
spacing between ceiling and the unit is over 0.79 in. (20mm),
attach sealing material in the part or recover the ceiling.
1. Prepare the ceiling opening needed for installation where
applicable (for existing ceilings).
a. Create the ceiling opening required for installation. From
the side of the opening to the casing outlet, implement the
refrigerant and drain piping and wiring for the remote
controller (unnecessary for wireless type). Refer to each
piping or wiring section.
b. After creating an opening in the ceiling, it may be necessary
to reinforce the ceiling beams to keep the ceiling level and
to prevent it from vibrating. Consult the builder fordetails.
2. Install the installation hooks. Use either a M8 or M10 size
bolt.
a. Use expansible hooks, sunken anchors or other field
supplied parts to reinforce the ceiling in order to bear the
weight of the unit.
b. Adjust the clearance from the ceiling before proceeding
further. Installation example see Fig. 27.

19
1
2
3
4
Fig. 27 --- Installation Clearances
(1.) Ceiling slab
(2.) Expansible hook (optional)
(3.) Installation hook (optional)
(4.) False ceiling
NOTE: For other installation than standard installation, contact
your dealer for details.
INDOOR UNIT INSTALLATION
When installing optional accessories, review the list of optional
accessories in the installation manual. Depending on the field
conditions, it may be easier to install optional accessories before
the indoor unit is installed (except for the decoration panel).
However, for existing ceiling, install the fresh air inlet component
kit and branch duct before installing the unit.
1. Install the indoor unit temporarily.
a. Attach the hanger bracket to the suspension bolt. Be sure
to fix it securely by using a nut and washer from the upper
and lower sides of the hanger bracket.
b. Securing the hanger bracket (see Fig. 28).
-
1
3
4
2
Fig. 28 --- Secure the Hanger bracket
(1.) Nut (field supply)
(2.) Washer (field supply)
(3.) Hanger bracket
(4.) Double nuts (field supply, tighten)
2. Secure the paper pattern for installation (for new ceilings
only).
SThe paper pattern for installation corresponds with the
measurements of the ceiling opening. Consult the builder
for details.
SThe center of the ceiling opening is indicated on the paper
pattern for installation.
SAfter removing the packaging material from the paper
pattern for installation, attach the paper pattern to the unit
with the attached screws (see Fig. 29).
Fig. 29 --- Attach Screws
(1.) Paper pattern for installation (on some models)
(2.) Center of the ceiling opening
(3.) Screws (supplied with the decoration panel)
3. Adjust the unit to the right position for installation. Refer to
the chapter “Preparations Before Installation”.
4. Check if the unit is horizontally leveled.
a. Do not install the unit tilted. The indoor unit is equipped
with a built--in drain pump and float switch. (If the unit is
tilted against the direction of the condensateflow (thedrain
piping side is raised), the float switch may malfunction and
cause water to drip).
b. Check if the unit is leveled at all four corners with a water
level or a water--filled vinyl tube (see Fig. 30).
Fig. 30 --- Ensure Unit is level
(1.) Water level
(2.) Vinyl tube
DRAIN PIPING WORK
Drain Piping Installation
Install the drain piping as shown in Fig. 31 and take steps to
eliminate condensation. Improperly rigged piping could lead to
leaks and eventually wet furniture and belongings.
1-1.5m 1
3~5ft
2
෭

Fig. 31 --- Drain Piping Installation

Fig. 32 --- Hanging Bar
(1.) Hanging bar
(2.) 1/100 gradient

20
Install the Drain Pipes
SKeep piping as short as possible and slope it downwards
at a gradient of at least 1/100 so that air may not remain
trapped inside the pipe.
SKeep pipe size equal to or greater than that of the
connecting pipe (PVC pipe, nominal diameter 0.79 in.
(20mm)) /, outside diameter 0.98 in. (25mm).
SPush the drain hose as far as possible over the drain socket,
and tighten the metal clamp securely.
Fig. 33 --- Push the drain hose
5. Remove the paper pattern for installation (for new ceiling
only).
(1.) Drain socket (attached to the unit)
(2.) metal clamp
(3.) Drain hose
(4.) Insulation (field supply)
a. Insulate the drain hose inside the building.
b. If the drain hose cannot be sufficiently set on a slope, fit
the hose with drain raising piping (field supply).
c. Ensure the heat insulation work is executed on the
following 2 spots to prevent any possible water leakage
due to dew condensation:
(1.) Indoor drain pipe
(2.) Drain socket.
DRAINAGE HOSE
IMPORTANT: Observe all local sanitary codes when installing
condensate drains.
1. Install the drain hose.
SThe drain hose diameter should be equal or bigger than the
connection pipe’s. (The diameter of the polythene pipe: Outer
diameter 1 in. (25 mm) Surface thickness 0.06 in. (1.5 mm).
SThe drain hose should be short and the drooping gradient
should be less than 1/100 to prevent the formation of an air
bubble. If the drain hose does not has enough of a drooping
gradient, a drain raising pipe should be added.
STo prevent a bend in the drain hose, the distance between the
hoisting stand should is 3 to 5 ft. (1 to 1.5 m) (see Fig. 34).
Fig. 34 --- Drain Hose
SUse the drain hoseand clamp attached. Insertthe drain hose
into the drain vent, and then tighten the clamp.
SEntwine the big sponge on the clamp of drain hose to
insulate heat.
SHeat insulation should be applied to the indoor drain hose.
Sponge(attachment)
Clamp(attachment)
Below 1/6 in (4 mm)
Clamp
Drain hose
Sponge (gray)
Fig. 35 --- Drain Hose
NOTE: Drain Setup pipe
SThe install height of the drain raising pipe should less than
21 in. (530 mm).
SThe drain raising pipe should form a right angle with the
unit, and distance to unit should not beyond 11.81 in.
(300mm).
0~2.95in
0~75
21in/530
29.5in/750
8.7in/220
Unit: in/mm
Fig. 36 --- Drain Setup Pipe
INSTRUCTION
The slant gradient of the attached drain hose should be within 3 in.
(75 mm) so that the drain hole does not have to endure unnecessary
outside force.
3in (75mm)
19 2/3 (500 mm)
Fig. 37 --- Slant Gradient
1. Install the drain hose according to the following process if
several drain hoses join together.
Fig. 38 --- Slant Gradient