Carrier 38MGQ, 40MBC, 40MBD, 40MBF, 40MAQ Installation Instructions 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.
SAFETY CONSIDERATIONS 2.........................
GENERAL 2.........................................
PIPING REQUIREMENTS 3............................
TABLE OF CONTENTS
PAGE
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..............
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.
!
!
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.
!
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.
WARNING
CAUTION
GENERAL
These instruc t ions cove r the install ation, start--up and servicing of the
multi--zone outdoor unit connect ed to up to five indoor fan coi l units.
For approved combinations , please refer to t he Product Data .
2
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
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)
Max. outdoor---indoor height difference
(IU higher than OU)
Max. height different between indoor units ft (m) 32(10) 32(10) 32(10) 32(10)
Piping
Refrigerant
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)
Total Maximum Piping Length per system Ft. (m) 98(30) 147(45) 196(60) 245(75)
Additional refrigerant charge
(between Standard – Max piping length)
Gas Pipe Size in (mm) 3/8*2 (9.52*2) 3/8*2 (9.52*3)
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.
Indoor High Wall
Indoor Cassette
Indoor Ducted
Indoor Floor Console
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.
NUMBER OF ZONES SIZE ADAPTOR QUANTITY
System size 18K 27K 36K 48K
ft (m) 32(10) 32(10) 32(10) 32(10)
ft (m) 49(15) 49(15) 49(15) 49(15)
ft (m) 49(15) 74(22.5) 98(30) 123(37.5)
Oz/ft (g/m) 0.16(15) 0.16(15) 0.16(15) 0.16(15)
1/2 *1 (12.7*1)
+ 3/8*3 (9.5*3)
Table 2—Indoor High Wall
SIZE 9 12 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
SIZE 9 12 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
SIZE 9 12 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
SIZE 9 12
Pipe Connection Size --- Liquid in. 1/4” 1/4”
Pipe Connection Size --- Suction in. 3/8” 1/2”
Table 6—Conversion Joints
2zone 18 3/8”------1/2” 2
3zone 27 3/8”------1/2” 3
4zone 36
5zone 48
3/8”------1/2” 3
1/2”------3/8” 1
1/2”------3/8” 2
1/4”------3/8” 2
1/2”------5/8” 2
3/8”------1/2” 3
1/2 *2 (12.7*2)
+ 3/8*3 (9.5*3)
Unit Size Number of Zones Charge oz. (kg.)
18 2 67.02 (1.9) 49 (15) 0.16 (15) 98 (30)
27 3 98.76 (2.8) 74 (22.5) 0.16 (15) 147 (45)
36 4 126.98 (3.6) 98 (30) 0.16 (15) 196 (60)
48 5 162.26 (4.6) 123 (37.5) 0.16 (15) 245 (75)
Additional Re frigerant 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.
Table 7—Additional Refrigerant Charge
Additional Charge Required
After ft. (m)
3
Additional Charge
oz./ft. (g/m)
Tot al Ma xi mu m P ip-
ing Length ft. (m.)
ELECTRICAL DATA
Table 8—High Wall
UNIT SIZE
9
12
18
24
30
UNIT SIZE
9
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
UNIT SIZE
9
12
18
UNIT SIZE
9
12
SYSTEM VOLTAGE OPERATING VOLTAGE INDOOR FAN
VOLT/PHASE/HZ MAX / MIN V --- P H --- H Z FLA HP W
0.07 0.027 20
0.07 0.027 20
208---230/1/60 253 / 187 208---230/1/60
0.17 0.077 58
0.23 0.08 60
0.23 0.08 60
Table 9—Ducted
SYSTEM VOLTAGE OPERATING VOLTAGE INDOOR FAN
VOLT/PHASE/HZ MAX / MIN FLA HP W
1.03 0.073 55
208---230/1/60 253 / 187
Table 10—Cassette
SYSTEM VOLTAGE OPERATING VOLTAGE INDOOR FAN
VOLT/PHASE/HZ MAX / MIN V --- P H --- H Z FLA HP W
0.146 0.061 46
208---230/1/60 253 / 187 208---230/1/60
0.146 0.061 46
0.146 0.061 46
Table 11—Floor Console
SYSTEM VOLTAGE OPERATING VOLTAGE INDOOR FAN
VOLT/PHASE/HZ MAX / MIN V --- P H --- H Z FLA HP W
208---230/1/60 253 / 187 208---230/1/60
0.21 0.027 20
0.21 0.027 20
Table 12—Multi Zone Outdoor Unit
UNIT SIZE
18
27 8.85
36 13.4
48 13.5
*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
SYSTEM VOLTAGE OPERATING VOLTAGE COMPRESSOR OUTDOOR FAN MCA
VOLT/PHASE/HZ MAX / MIN RLA FLA HP W
208---230/1/60 253 / 187
9.7
MAX
FUSE/CB
AMP
3 0.16 50 15 20
3 0.16 120 19 25
3 0.16 120 27 40
3 0.11 85 29 50
4
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
S Wires should be sized based on NEC and local codes.
S Use copper conductors only with a minimum 600 volt .
rating and 2/64--inch thick insulation.
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
S Be sure to comply with local codes while running wire from
indoor unit to outdoor unit.
S Every 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.
S No wire should be allowed to touch refrigerant tubing,
compressor or any moving parts.
S Disconnecting means must be provided and shall be located
within sight and readily accessible from the air conditioner.
S Connecting cable with conduit shall be routed through hole
in the conduit panel.
CAUTION
CAUTION
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.
Recomme nde d Connection Method for Power and
Communication --W i ring -- Power and Communication Wi r ing:
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.
Recomme nde d Connection Method for Power and
Communication Wiring (To minimize communicati on wiring
interference)
Power Wiring:
The main power is supplied to the outdoor unit. The field suppl i ed
power wiring from the outdoor unit to the indoor unit consist s of three
(3) wires and pr ovides the power for the indoor unit. Two wires are
high voltage AC power and one is a ground wire. T o minimize a
voltage drop, t he factory recomm ended 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.
5
DIMENSIONS -- INDOOR
UNIT SIZE W In. (mm) D In. (mm) H In. (mm)
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. 1 --- High Wall Dimensions
Table 13—High Wall Dimensions
OPERATING WEIGHT
Lbs. (kg)
UNIT SIZE
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)
BODY PANEL BODY PANEL BODY PANEL
Fig. 2 --- Cassette Dimensions
Table 14—Cassette Dimensions
9K 12K 18K
6
DIMENSIONS -- INDOOR (CONTINUED)
OUTLINE DIMENSIONS
in(mm)
SIZE A B C D E F G H I J K L M H1 H2 W1 W2
27.6
(700)
27.6
(700)
36.2
(920)
36.2
(920)
8.2
(210)25(635)
8.2
(210)25(635)
8.2
(210)25(635)
10.6
(270)25(635)
9
12
18
24
22.4
(570)
22.4
(570)
22.4
(570)
22.4
(570)
2.5
(65)
2.5
(65)
2.5
(65)
2.5
(65)
AIR OUTLET
OPENING SIZE
in(mm)
19.4
1.3
(493)
(35)
19.4
1.3
(493)
(35)
19.4
1.3
(493)
(35)
19.4
1.3
(493)
(35)
Fig. 3 --- Ducted Dimensions
Table 15—Ducted Dimensions
AIR RETURN
OPENING SIZE
in(mm)
4.6
23.4
7.8
(119)
4.6
(119)
4.6
(119)
7.0
(179)
(595)
23.4
(595)
32.0
(815)
32.0
(815)
(200)
7.8
(200)
7.8
(200)
10.2
(260)
3.1
(80)
3.1
(80)
3.1
(80)
0.7
(20)
7
HANGAR
BRACKETS
in(mm)
29.1
(740)
29.1
(740)
37.8
(960)
37.8
(960)
13.8
(350)
13.8
(350)
13.8
(350)
13.8
(350)
REFRIGERANT PIPE
LOCATIO NS
in(mm)
4.7
5.6
(120)
(143)
4.7
5.6
(120)
(143)
4.7
5.6
(120)
(143)
4.7
5.6
(120)
(143)
3.7
(95)
3.7
(95)
3.7
(95)
3.7
(95)
5.9
(150)
5.9
(150)
5.9
(150)
5.9
(150)
OPERATING
WEIGHT
Lbs. (kg)
in(mm)
39.90 (18.1)
39.90 (18.1)
50.7
(23)
57.32
(26)
DIMENSIONS -- INDOOR (CONTINUED)
UNIT SIZE 9 12
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)
Fig. 4 --- Floor Console Dimensions
Table 16—Floor Console Dimensions
8
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)
NOTE: No master valves available on Size 18K.
Fig. 5 --- Outdoor Dimensions Size 18
9
DIMENSIONS -- OUTDOOR (CONTINUED)
Suction
Fig. 6 --- Outdoor Dimensions Size 27
10
DIMENSIONS -- OUTDOOR (CONTINUED)
Suction
Fig. 7 --- Outdoor Dimensions Size 36
11
DIMENSIONS -- OUTDOOR (CONTINUED)
Suction
Fig. 8 --- Outdoor Dimensions Size 48
12
CLEARANCES -- INDOOR
NOTE: Allow sufficient space for airflow and unit servicing. See Fig. 9 through 14 for minimum required clearances.
CEILING
6" (0.15m) min.
5
"
(0.13m)
min.
6'
(1.8m)
5
"
(0.13m)
min.
FLOOR
Fig. 9 --- High Wall Clearance
Fig. 10 --- Cassette Unit Clearance
13
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