Carrier 40MBD-06SI User manual

40MB*D
Ducted Style Ductless System
Sizes 09 to 48
Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
NOTE: Images are for illustration purposes only. Actual models
may differ slightly.
TABLE OF CONTENTS PAGE
SAFETY CONSIDERATIONS 2.........................
PARTS LIST 3.......................................
SYSTEM REQUIREMENTS 4...........................
WIRING 4...........................................
DIMENSIONS 5......................................
CLEARANCES 6.....................................
INSTALLATION LOCATION REQUIREMENTS 7..........
INDOOR UNIT INSTALLATION 7.......................
FAN PERFORMANCES 9..............................
ELECTRICAL DATA 17...............................
CONNECTION DIAGRAMS 17.........................
WIRELESS REMOTE CONTROL INSTALLATION 19......
START−UP 20........................................
TROUBLESHOOTING 21..............................

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 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, 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.
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.
Never use air or gases containing
oxygen for leak testing or operating
refrigerant compressors. Pressurized
mixtures of air or gases containing
oxygen can lead to an explosion.
!WARNING
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
compressorat start−up.

3
PARTS LIST
Table 1—Parts List
PART NO. NAME OF PART
1AIR OUTLET
2AIR INLET
3AIR FILTER
4ELECTRIC CONTROL CABINET
5WIRED CONTROLLER
6DRAIN PIPE (FIELD SUPPLIED)
7WIRELESS REMOTE
ON/OFF
TEMP
FP
TIMER
ON
TIMER
OFF
MODE
FAN/SLC
SLEEPSWING
DIRECT
TURBO CLEAN LED
FOLLOW
Fig. 1 - Parts List
Notes:
- If the outdoor unit is higher than the indoor unit, prevent rain from flowing into the indoor unit along the connection pipe by creating a downward arc in the connection pipe before it
enters the wall to the indoor unit. This ensures that rain drips from the connection pipe before it enters the wall.
- Piping and the interconnecting wiring are field supplied.
- The illustration above is only a sketch. Different models may be slightly different.
- Filter Standard on units produced after serial number 2815V10001
The following units are covered in these installation instructions.
Table 2—Indoor Units
kBTUh V-Ph-Hz ID Model No.
9208/230-1-60 40MBQB09D--3
12 208/230-1-60 40MBQB12D--3
18 208/230-1-60 40MBQB18D--3
24 208/230-1-60 40MBQB24D--3
36 208/230-1-60 40MBQB36D--3
48 208/230-1-60 40MBQB48D--3

4
SYSTEM REQUIREMENTS
Allow sufficient space for airflow and servicing unit. See Fig. 3 for
minimum required distances between the unit and the walls or
ceilings.
Piping
IMPORTANT: Both refrigerant lines must be insulated
separately.
SMinimum refrigerant line length between the indoor and outdoor
units is 10 ft. (3 m).
STable 3 lists the pipe sizes for the indoor unit. Refer to the
outdoor unit installation instructions for other allowed piping
lengths and refrigerant information.
Table 3—Piping Lengths
9K 12K 18K 24K 36K 48K
Gas Pipe
(size-connection
type)
In
(mm)
3/8
(9.52)
1/2
(12.7)
1/2
(12.7)
5/8
(16)
5/8
(16)
5/8
(16)
Liquid Pipe
(size-connection
type)
In
(mm)
1/4
(6.35)
1/4
(6.35)
1/4
(6.35)
3/8
(9.52)
3/8
(9.52)
3/8
(9.52)
WIRING
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 caution note, only stranded copper conductors with a 600 volt
rating and double insulated copper wire must be used. 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 the 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 voltage drop, the factory recommended wire size is
14/2 stranded with a ground.
Communication Wiring:
A separate shielded stranded copper conductor only, with a 600
volt rating and double insulated copper wire, must be used as the
communication wire from the outdoor unit to the indoor unit.
Pleaseuse a separate shielded 16GA stranded control wire.
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 600 volt rating and
double insulated copper wire.

5
DIMENSIONS − INDOOR
A
C
B
D
J
I
K
Air filter air inlet from rear side
air inlet from bottom side
FE
G
H
Electric control box
Air filter
L
4-install hanger
Gas side
Liquid side
M
W1
W2
H1
H2
Ø 1 (25) Drain connecting
pipe ( for pump )
Test mouth & Test cover
Outside Air Intake
Ø 1 (25)
Drain pipe
Ø 1 (25)
Drain pipe
Fig. 2 - Indoor Unit
Table 4—Indoor Unit
UNIT: in (mm)
OPERATING
WEIGHT
lb (kg)
OUTLINE
DIMENSIONS
AIR OUTLET
OPENING SIZE
AIR RETURN
OPENING SIZE
HANGER
BRACKERS
REFRIGERANT PIPE
LOCATIONS
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)
39.9
(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)
39.9
(18.1)
18 36.2
(920)
8.2
(210)
25
(635)
22.4
(570)
2.5
(65)
28.07
(713)
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)
28.07
(713)
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)
57.3
(26)
36 44.8
(1140)
10.6
(270)
30.5
(775)
27.9
(710)
2.5
(65)
36.7
(933)
1.3
(35)
7.0
(179)
40.7
(1035)
10.2
(260)
0.7
(20)
46.5
(1180)
19.3
(490)
4.7
(120)
5.6
(143)
3.7
(95)
5.9
(150)
77.1
(35)
48 47.2
(1200)
11.8
(300)
34.1
(865)
31.4
(800)
3.1
(80)
38.1
(968)
1.5
(40)
8.0
(204)
43.0
(1094)
11.3
(288)
1.7
(45)
48.8
(1240)
19.7
(500)
6.9
(175)
7.8
(198)
6.1
(155)
8.3
(210)
99.2
(45)

6
CLEARANCES − INDOOR
A
A/2 A/2
Fig. 3 - Indoor Unit Clearances
Table 5—Indoor Unit Clearance
Capacity (Kbtu) A B C
9K 27.56 in. (70cm) 8.27 in. (21cm) 11.81 in. (30cm)
12K 27.56 in. (70cm) 8.27 in. (21cm) 11.81 in. (30cm)
18K 36.22 in. (92cm) 8.27 in. (21cm) 11.81 in. (30cm)
24K 36.22 in. (92cm) 10.63 in. (27cm) 11.81 in. (30cm)
36K 44.88 in. (114cm) 10.63 in. (27cm) 11.81 in. (30cm)
48K 47.24 in. (120cm) 11.81 in. (30cm) 15.75 in. (40cm)

7
INSTALLATION LOCATION
REQUIREMENTS
Indoor Unit
SConfirm that the ceiling is able to support the weight of the unit.
SThere should be enough room within the false ceiling for
installation and maintenance.
SThe false ceiling should be horizontal and leveled.
SInstall the unit in a location within the room that allows uniform
air flow in all directions.
SDo not install the indoor units near a direct source of heat such as
direct sunlight or a heating appliance.
SA location which provides appropriate clearances.
SEnsure the hanger is strong enough to withstand the unit’s weight.
Indoor and Outdoor Units (General)
SEnsure space is left for access for maintenance.
SLocation should be far away from where there is a heat source,
leakage of any inflammable, explosive substances, or smog.
SAll wiring and refrigerant lines must be at least 3 ft. (1m) away
from sources of electromagnetic interference (such as televisions,
radios, etc.). Interference is still possible even if this distance is
maintained.
SDo not install the indoor or outdoor units in a location with
special environmental conditions. For those applications, contact
your Ductless representative.
INDOOR UNIT INSTALLATION
INDOOR DUCTED UNIT INSTALLATION
CAUTION
!
Be sure that the ceiling grid is supported separately from
the unit.
The ceiling grid must not be supported by any part of the
unit or any associated wiring or piping work.
MOUNTING THE UNIT
1. INSTALLING HANGER BOLTS − Install the hanger bolts
at the locations (see Fig. 4, top view). Use Ø10 / Ø0.394in
all−threaded rod.
A150664
Fig. 4 - Install the Hanger Bolts
2. The unit can now be lifted on to the hanging rods for
mounting.
3. Use rods and fasteners to suspend the unit at the factory
provided mounting holes.
4. Adjust the unit’s height until the bottom is level with the false
ceiling, with adequate space to provide enough pitch for the
drain.
5. Secure the unit in position with lock nuts and washers on
both sides of the mounting bracket. Ensure the threaded
rod does not extend more than 2 in. below the mounting
brackets (see Fig. 5).
A150665
Fig. 5 - Secure the Unit
RETURN AIR ARRANGEMENT
Based on the return air arrangement requirement in the field, the
unit can be modified from the rear return to the bottom return.
1. Remove the return air duct collar/filter rack and plenum
bottom panel.
A150666
Fig. 6 - Remove the Return Air Duct Collar
2. Install the Seal Sponge on the bottom inlet.
A150667
Fig. 7 - Install the Seal Sponge
3. Swap the position to change the rear return to bottom return
arrangement installing the Air Return flange and the filters.
A150668
Fig. 8 - Change the Rear Return

8
4. Install the filter brackets to lock the filter in place.
A150670
Fig. 9 - Install the Filter Brackets
INSTALLING DUCTWORK
Connect the return and supply ducts to the duct collars provided
on the unit. Adequate distance between the return and supply
diffusers should be maintained to avoid short circulation of air
within the space.
The filter is located on the return side of the unit, on the rear or
bottom depending on the return air inlet arrangement.
A150671
Fig. 10 - Installing Duct
CONDENSATE PIPE INSTALLATION
The unit (starting with serial number 0116V10001) is supplied with a
1 in ID drain connection to connect 1in OD copper or PVC drain
piping. When installing condensate piping, follow these
recommendations:
SInstall drains to meet local sanitation codes.
SThe Ducted Style Indoor unit is supplied with a pump that
is capable of lifting water 29.5in (750mm).
SThe highest point in the condensate piping should be as
close to the unit as possible (see Fig. 11).
SCondensate piping should slope downward in the direction
of condensate flow, with a minimum gradient of 1/50.
SWhen multiple units are connected to a common
condensate drain, ensure that the drain is large enough to
accommodate the volume of condensate from all units. It
is also recommended to have an air vent in the
condensate piping to prevent air lock.
SCondensate piping must not be installed where it may be
exposed to freezing temperatures.
A150672
Fig. 11 - Condensate piping with a pump
A150673
Fig. 12 - Condensate piping without a pump
DRAIN PUMP AND DRAINAGE TEST
Follow these steps to perform the test:
1. Remove the test cover by rotating it counter−clockwise as
shown in Fig. 13.
2. Using a piece of tubing or pipe, fill the drain pump reservoir
with 70 oz. of water (see Fig. 14).
3. Turn the unit ON in cooling mode. The pump comes on.
Watch the end of the drain pipe for any water. It may take
some time for the water to travel, depending on the length
of the drain pipe.
4. During this test, check all bends or joints for leakage.
A150674
Fig. 13 - Check the Bends and Joints for Leakage
A150675
Fig. 14 - Tube/Pipe Insert

9
NOTE: In case the factory installed drain pump has to be disabled, place a Jumper (field supplied) on the Pin CN5 ”WATER” connector and
disconnect the Pin CN13 ”PUMP” (see Fig 15).
Add Jumper
Pin CN5
“WATER”
Disconnect
Pin CN13
“PUMP”
Fig. 15 - Pin CN5

10
FAN PERFORMANCES AT VARYING STATIC PRESSURES (DUCTED UNITS)
The static pressure of the indoor unit has been set in the factory according to Table 6.
Table 6—Static Pressure Switch
Static Pressure
Range In. WG (Pa)
Size 01234
9 & 12 0.02
(5)
0.04
(10)
0.08
(20)
0.12
(30)
0.16
(40)
0-0.18
(0-45)
18 0.04
(10)
0.10
(25)
0.14
(35)
0.18
(45)
0.22
(55)
0-0.28
(0-70)
24 0.04
(10)
0.10
(25)
0.16
(40)
0.22
(55)
0.28
(70)
0-0.40
(0-100)
36 & 48 0.08
(20)
0.14
(35)
0.20
(50)
0.26
(65)
0.32
(80)
0-0.40
(0-100)
Factory Setting √
Table 7—Airflow at Different Speeds
SYSTEM SIZE 9K 12K 18K 24K 36K 48K
High CFM 335 370 520 820 1120 1470
CMH 570 629 884 1394 1904 2499
Medium CFM 290 320 430 620 940 1180
CMH 493 544 731 1054 1598 2006
Low CFM 240 260 360 520 680 940
CMH 408 442 612 884 1156 1598

11
STATIC PRESSURE CURVES SIZE 9

12
STATIC PRESSURE CURVES SIZE 12

13
STATIC PRESSURE CURVES SIZE 18

14
STATIC PRESSURE CURVES SIZE 24

15
STATIC PRESSURE CURVES SIZE 36

16
STATIC PRESSURE CURVES SIZE 48

17
ELECTRICAL DATA Table 8—Electrical Data
UNIT SIZE INDOOR FAN MAX FUSE CB AMP
V-PH-HZ FLA HP W
Refer to outdoor unit installation instructions –
Indoor unit powered by the outdoor unit
9
208-230/1/60
1.03 0.07 55
12 1.03 0.07 55
18 0.83 0.12 90
24 0.83 0.12 90
36 1.26 0.20 150
48 2.23 0.32 240
LEGEND
FLA - Full Load Amps
CONNECTION DIAGRAMS
A150687
Fig. 16 - Connection Diagrams 9, 12, 18 and 24
A150688
Fig. 17 - Connection Diagrams 36 and 48
A150641
Fig. 18 - Control and Power Wiring on Indoor Unit
Notes:
1. Do not use thermostat wire for any connection between indoor and outdoor units.
2. All connections between indoor and outdoor units must be as shown. The connections are sensitive to polarity and will result in a fault code.

18
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. Connect wiring from outdoor unit per the connection
diagram (see Fig. 16 and Fig. 17).
3. Replace field wiring cover of the indoor unit.
4. Connect refrigerant piping and drain line outside of indoor
unit. Complete pipe insulation at flare connection then
fasten piping and wiring to the wall as required.
Completely seal the hole in the wall.
5. Piping:
a. Cut the pipe, with a pipe cutter, at 90 degrees (see Fig. 19).
b. Remove the service connection, if provided with the unit.
Oblique
DŽ
90 Roughness
Burr
A150767
Fig. 19 - Pipe Cutting
c. Remove all the burrs from the cut cross section of the pipe
avoiding any burrs inside the tubes.
d. Remove the flare nuts attached to the indoor and outdoor
units.
e. Install the correct size flare nut onto the tubing and make
the flare connection. Refer to Table 9 for the flare nut
spaces. Table 9—Flare Nut Spacing
OUTER DIAM. (mm) A (mm)
Max. Min.
Ø1/4" (6.35) 0.05 (1.3) 0.03 (0.7)
Ø3/8" (9.52) 0.06 (1.6) 0.04 (1.0)
Ø1/2" (12.7)0.07 (1.8) 0.04 (1.0)
Ø 5/8" (15.88) 0.09 (2.2) 0.08 (2.0)
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
A150768
Fig. 20 - Flare Nut Spacing
f. Apply a small amount of refrigerant oil to the flare
connection on the tubing.
g. Align center of the pipes and/or service valve.
Indoor unit tubing Flare nut Piping
A150769
Fig. 21 - Align Pipe Center
h. Connect both the liquid and gas piping to the indoor unit
i. Tighten the flare nut using a torque wrench as specified in
Table 10.
Table 10—Tightening Torque
PIPE DIAMETER INCH
(mm)
TIGHTENING TORQUE
Ft-lb N-m
Ø1/4” (6.35) 10 to 13 13.6 to 17.6
Ø3/8” (9.52) 24 to 31 32.5 to 42.0
Ø1/2” (12.7)37 to 46 50.1 to 62.3
Ø5/8” (15.88)50 to 60 67.7 to 81.3
Flare nut
Copper tube
A150770
Fig. 22 - Tighten the Flare Nut
6. 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.
NOTE: For applications where gravity cannot be used for
drainage, a condensate pump accessory is available. Consult the
condensate pump Installation Instructions for more information.

19
WIRELESS REMOTE CONTROL INSTALLATION
Mounting Bracket (if installed on the wall)
1. Use the two screws supplied with control to attach the mounting bracket to the wall in a location selected by customer and within
operating range.
2. Install batteries in the remote control.
3. Place the remote control into the remote control mounting bracket.
4. For remote control operation, refer to the unit owner’s manual.
NOTE: If a wireless remote controller is used, relocate the infrared (IR) receiver within line of sight of remote location using the 6 ft. (1.82 m)
cable included. The factory location of the IR receiver is inside the control box (see Fig. 23).
A150642
Fig. 23 - Control Box
WIRED REMOTE CONTROLLER INSTALLATION
To connect the wired remote controller (Timer Function KSACN0101AAA) to the indoor unit, use 5−core shielded cable and 5−pin
connector from IR receiver located in the control box (see Fig 23).
To connect the wired remote controller (7 Day Programmable KSACN0501AAA) to the indoor unit, use 4−pin connector CN40 located in
the control box. For setup instructions, refer to the controller installation manual.

20
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Never use the system compressor as a vacuum pump.
CAUTION
!
Refrigerant tubes and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. The alternate
triple evacuation method may be used if the procedure outlined
below is followed. Always break a vacuum with dry nitrogen.
Final Tubing Check
IMPORTANT: Check to be certain factory tubing on both indoor
and outdoor unit has not shifted during shipment. Ensure tubes are
not rubbing against each other or any sheet metal. Pay close
attention to feeder tubes, making sure wire ties on feeder tubes are
secureand tight.
START−UP
Test Operation
Perform test operation after completing gas leak and electrical
safetycheck (see Fig. 24).
A150643
Fig. 24 - Test Operation
1. Press the MANUAL button on the IR receiver located in
the control box to begin testing.
NOTE: A protection feature prevents air conditioner from being
activatedfor approximately 3 to 4 minutes.
2. Push MODE, select COOLING, HEATING, FAN mode
to check if all functions work correctly.
3. To run the test using the manual button in the indoor unit:
(1.) Open front panel of the indoor unit;
(2.) Push the manual switch once to energize the unit.
The set conditions of manual operation are as
follows:
· Preset set point: 76_F (24_C)
· Fan speed: AUTO
· Discharge air direction: Pre−set position based on
operation in “Cool” or “Heat” mode.
4. Be sure to set the manual switch to “OFF” (by pushing it
twice again) after finishing the test operation.
SYSTEM CHECKS
1. Conceal the tubing where possible.
2. Make sure that the drain tube slopes downward along its
entire length.
3. Ensure all tubing and connections are properly insulated.
4. Fasten tubes to the outside wall, when possible.
5. Seal the hole through which the cables and tubing pass.
INDOOR UNIT
1. Do all remote control buttons function properly?
2. Do the display panel lights work properly?
3. Does the air deflection louver function properly?
4. Does the drain work?
Explain Following Items To Customer (with the aid of the
Owner’s Manual):
1. How to turn air conditioner on and off; selecting
COOLING, HEATING and other operating modes;
setting a desired temperature; setting the timer to
automatically start and stop air conditioner operation; and
all other features of the remote control and display panel.
2. How to remove and clean the air filter.
3. How to set air deflection louver.
4. Explain care and maintenance.
5. Present the owner’s manual and installation instructions to
customer.