BLD2023-0616_Manufacturer_Specifications_and_Installation_Instructions_5.19.2023_10.07.27_AM_3556339Installation Instructions
NOTE: Read the entire instruction manual before starting the installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS
2
:::::::::::::::::::::::..
GENERAL .........................................
2
PARTS LIST ........................................
3
SYSTEM REQUIREMENTS ...........................
4
PIPING REQUIREMENTS ............................
4
DIMENSIONS — OUTDOOR ..........................
6
CLEARANCES ....................................
] 0
INSTALLATION GUIDE .............................
11
INSTALLATION TIPS ...............................
11
OUTDOOR UNIT INSTALLATION ....................
11
ELECTRICAL DATA ...............................
12
CONNECTION DIAGRAMS
13
:::::::::::::::::::::::..
START—UP ........................................
16
OUTDOOR UNIT DIAGNOSTIC GUIDES ..............
17
NOTE: Image for illustration purposes only. Actual model may be
slightly different.
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 coil cleaning. 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
a 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, the
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.
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, refer to the product data
document.
2
PARTS LIST
PART NO.
1
Table 1—Parts List
PART NAME OTY.
Outdoor unit 1
Literature package including installation instructions and warranty 1
Grommet to secure the outdoor unit (helps with vibration prevention during unit operation) 4
Drain Joint 1
Drain Hose 1
Conversion Joints (see Table 4) —
Fig. I — Parts List
A150766
NOTE:
— If the outdoor unit is higher than the indoor unit, prevent rain from flowing into the indoor unit along the connection pipe by making
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.
The following units are covered in these installation instructions.
Table 2—Unit Sizes
SYSTEM TONS kBTUh VOLTAGE — PHASE
1.50 18 208/230-1
2 24 208/230-1
2.5 30 208/230-1
3.00 36 208/230-1
4.00 48 208/230-1
OUTDOOR MODEL
38MGRO18B--3
38MGRO24C--3
38MGR030D--3
38MGRO36D--3
38MGRO48E--3
3
SYSTEM REQUIREMENTS
Allow sufficient space for airflow and service of the unit. See Fig. 2 for the required minimum distances between the unit, walls or ceilings.
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 3 lists the pipe sizes for the outdoor unit. For the indoor unit pipe sizes refer to the indoor unit installation instructions.
Table 3-Piping and Refrigerant
SYSTEM SIZE 18K 24K 30K 36K 48K
Min. Piping Length per each indoor unit ft (m) 10 (3) 10 (3) 10 (3) 10 (3) 10 (3)
Standard Piping Length per each indoor ft (m) 25(7.5) 25(7.5) 25(7.5) 25(7.5) 25(7.5)
't
um
Max. outdoor -indoor height difference
ft (m)
49 (15)
49 (15)
49 (15)
65 (20)
65 (20)
(OU higher than IU)
Max. outdoor -indoor height difference
ft (m)
49 (15)
49 (15)
49 (15)
65 (20)
65 (20)
(IU higher than OU)
Max. height different between indoor units
ft (m)
32 (10)
32 (10)
32 (10)
32 (10)
32 (10)
Max. Length per each indoor unit
ft (m)
82 (25)
98 (30)
115 (35)
115 (35)
115 (35)
Piping Max. Piping Length with no additional
refrigerant charge per System
ft (m)
49 (15)
74 (22.5)
98 (30)
123 (37.5)
123 (37.5)
(Standard Piping length x No. of Zones)
Total Maximum Piping Length per system
ft (m)
131 (40)
197 (60)
263 (80)
328 (100)
328 (100)
Additional refrigerant charge
(between Standard - Max piping length)
Oz/ft
(g/m)
0.16 (15)
0.16 (15)
0.16 (15)
0.16 (15)
0.16 (15)
Suction Pipe Size
p
in
3/8*2
3/8*3
1/2*1+3/8*3
1/2 *2+3/8*2
1/2 *2+3/8*3
(mm)
(9.5*2)
(9.5*3)
(12.7*1 +9.5*3)
(12.7*2+9.5*2)
(12.7*2+9.5*3)
Liquid Pipe Size
in
1/4 *2
1/4 *3
1/4 *4
1/4 *4
1/4 *5
(mm)
(6.3*2)
(6.3*3)
(6.3*4)
(6.3*4)
(6.3*5)
Refrigerant Refrigerant Type
R410A
R410A
R410A
R410A
R410A
Charge Amount
Lbs (kg)
4.41 (2.0)
6.17 (2.8)
6.61 (3.0)
10.14 (4.6)
10.14 (4.6)
NOTE: The refrigerant charge included is adequate
for the outdoor unit's maximum number of zones multiplied by the standard
piping length per
zone. For piping runs greater than the "Maximum
Piping Length with no additional refrigerant charge per System", see Additional Refrigerant
Charge (Table 5).
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 includes a package of conversion joints to facilitate installation of the various fan coil sizes. These joints are to be connected
to the outdoor unit as needed to match the line set size.
Table 4-Conversion Joints
No. of Zones
Size
Adaptor
Qty.
2 zone
18
3/8"--1 /2"
2
3 zone
24
3/8"--1 /2"
3
3/8"--1 /2"
3
1/2 -3/8
1
4 zone
30
1 /4" --3/8"
1
1 /2"--5/8"
1
1 /2"--3/8"
2
4 zone
36
1/4"--3/8"
2
5 zone
48
1/2"--5/8"
2
3/8"--1 /2"
3
Table 5-Additional Refrigerant Charge
Unit Size
No. of Zones
Charge oz. (kg.)
Additional Charge Required
Additional Charge
Total Maximum
After ft. (m)
-./ft. (g/m)
Piping Length ft. (m.)
18
2
70.55 (2.0)
49 (15)
0.16 (15)
131 (40)
24
3
98.76 (2.8)
74 (22.5)
0.16 (15)
197 (60)
30
4
105.82 (3.0)
98 (30)
0.16 (15)
263 (80)
36
4
162.26 (4.6)
123 (37.5)
0.16 (15)
328 (100)
48
5
162.26 (4.6)
123 (37.5)
0.16 (15)
328 (100)
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
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 the 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.
Please use a separate shielded 16GA stranded control wire.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
• Wires should be sized based on NEC and local codes.
• Use copper conductors only with a minimum 600 volt
rating and double insulated copper wire.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
• Be sure to comply with local codes while running wire from
the indoor unit to the outdoor unit.
• Every wire must be connected firmly. Loose wiring may
cause the terminal to overheat or result in unit malfunction.
A fire hazard may also exist. Therefore, ensure all wiring is
tightly connected.
• No wire should be allowed to touch the refrigerant tubing,
compressor or any moving parts.
• Disconnecting means must be provided and shall be located
within sight and readily accessible from the air conditioner.
• Connecting cable with conduit shall be routed through a hole
in the conduit panel.
DIMENSIONS - OUTDOOR
Table 6—Dimensions
UNIT SIZE
18
24
30
36
48
Height
in (mm)
27.6 (703)
31.89 (810)
31.89 (810)
52.48 (1333)
52.48 (1333)
Width
in (mm)
33.27 (845)
37.24 (946)
37.24 (946)
41.14 (1045)
41.14 (1045)
Depth
in (mm)
13.19 (335)
15.20 (386)
15.20 (386)
14.96 (380)
14.96 (380)
Weight —Net
Ibs (kg)
105.8 (48)
149.9 (68)
156.5 (71)
223.8 (101.5)
223.8 (101.5)
2.60(66)
P
0 47(12)
Fig. 2 — Outdoor Dimensions Size 18
NOTE: Master valves are not available on the size 18 unit.
DIMENSIONS - OUTDOOR (CONTINUED)
2.87(73) N
0.47(12
d
I\
1'
26.50(673)
37.24(946)
0 40.71(1C
Fig. 3 — Outdoor Dimensions Size 24
Fig. 4 — Outdoor Dimensions Size 30
O
O
7
DIMENSIONS - OUTDOOR (CONTINUED)
DETAIL .
Fig. 5 — Outdoor Dimensions Size 36
DIMENSIONS - OUTDOOR (CONTINUED)
DETAIL .
Fig. 6 — Outdoor Dimensions Size 48
CLEARANCES - OUTDOOR
Air -inlet
Fig. 7 — Clearances Outdoor
Table 7— Clearances Outdoor Values
UNIT MINIMUM VALUE
in. (mm)
A 24 (609)
B 24 (609)
C 24 (609)
D 4 (101)
E 6 (152)
NOTE: Outdoor Unit must be mounted at least 2in (50mm) above the maximum anticipated snow depth.
10
INSTALLATION GUIDE
Up to five fan coil units can be connected to one outdoor unit.
Refer to the product data for approved combinations.
INSTALLATION TIPS
Ideal installation locations include:
Outdoor Unit
• A location which is convenient to installation and not exposed to
strong winds.
• A location which can bear the weight of the outdoor unit and
where the outdoor unit can be mounted in a level position.
• A location with appropriate clearances as outlined in Fig. 7.
• Do not install the indoor or outdoor units in a location with
special environmental conditions. For those applications, contact
your Ductless representative.
OUTDOOR UNIT INSTALLATION
1. Use a rigid base to support unit in a level position.
2. Locate the outdoor unit and connect piping and wiring.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Excessive torque can break flare nut depending on
installation conditions.
NOTE: Install the outdoor unit on a rigid base to reduce noise levels
and vibration. Determine the optimal air outlet direction to prevent
discharged air from being blocked. If the installation site is exposed to
strong winds such as a coastal areas, ensure the fan's proper operation
by installing the unit lengthwise along the wall or use dust or shield
plates. If the unit needs to be suspended, the installation bracket should
comply with the suspension requirements in the installation bracket
diagram. The installation wall should be solid brick, concrete or the
same intensity construction, or take steps to reinforce and dampen the
support. The connection between the bracket and the wall as well as
the bracket and the air conditioner should be firm, stable and reliable.
Ensure there is no obstacle which may block the radiating air.
Strong
wind �
0 X
A07350
Fig. 8 - High Wind Installation
MAKE REFRIGERANT PIPING CONNECTIONS
(OUTDOOR UNIT)
IMPORTANT: Use refrigeration grade tubing ONLY. No other
type of tubing may be used. Use of other tubing types will void the
manufacturer's warranty.
Piping Guide:
• Do not open service valves or remove protective caps from
tubing ends until all the connections are made.
• Bend the tubing with bending tools to avoid kinks and flat spots.
• Keep the tubing free of dirt, sand, moisture, and other
contaminants to avoid damaging the refrigerant system.
• Avoid sags in the suction line to prevent the formation of oil traps.
Insulate each tube with minimum 3/8-in. (10 mm) wall thermal
pipe insulation. Inserting the tubing into the insulation before
making the connections saves time and improves installation quality.
1. The unit is equipped with multiple pairs of service valves.
Each pair is clearly marked (color and letter) to identify the
indoor unit circuits. In the outdoor unit wiring area, each
indoor unit interconnecting terminal block is marked (letter)
the same as the corresponding pair of service valves. The
indoor units must be piped and wired in matched sets (A to A;
B to B, etc.).
2. It is not required to use all of the available fan coil
connections if the application does not require them at the
current time. The system can be expanded at any time.
3. Conversion joints are supplied with the outdoor unit. They
are required for certain fan coil combinations. These joints
are to be connected to the outdoor unit as needed to match
the line set size.
4. Remove the service connection, if provided with the unit.
X X X
90 Oblique Roughness Burr
i
A150767
Fig. 9 - Cut the Pipe
5. Remove all the burrs from the cut cross section of the pipe
avoiding any burrs inside the tubes.
6. Remove the flare nuts attached to the indoor and outdoor
units.
7. Install the correct size flare nut onto the tubing and make a
flare connection. Refer to Table 8 for the flare nut spaces.
Table 8-Flare Nut Spacing
OUTER DIAM. (mm) A (mm)
Max. Min.
01/4"(6.35) 0.05 (1.3) 0.03(0.7)
03/8"(9.52) 0.06 (1.6) 0.04(1.0)
01/2"(12.7) 0.07 (1.8) 0.04(1.0)
05/8"(15.88) 0.09 (2.2) 0.08(2.0)
Handle
Q
Bar Bar
Yoke
Cone
Copper pipe f
Clamp handle Red arrow mark
A150768
Fig. 10 - Flare Nut Spacing
Apply a small amount of refrigerant oil to the flare
connection on the tubing.
Align the center of the pipes and/or the service valve.
36,
Indoor unit tubing Flar_e nut Piping
A150769
Fig. 11 - Align Pipe Center
10. Connect both the liquid and gas piping to the indoor unit.
11. Tighten the flare nut using a torque wrench as specified in
Table 9.
12. Complete the installation.
Table 9-Tightening
Torque
PIPE DIAMETER
TIGHTENING TORQUE
INCH (mm)
Ft -lb
N-m
01/4" (6.35)
10 to 13
13.6 to 17.6
03/8" (9.52)
24 to 31
32.5 to 42.0
01/2" (12.7)
37 to 46
50.1 to 62.3
05/8" (15.88)
50 to 60
67.7 to 81.3
11
INSTALL ALL POWER AND INTERCONNECTING
WIRING TO OUTDOOR UNIT
1. Mount the outdoor power disconnect.
2. Run power wiring from the main box to the disconnect per
NEC and local codes.
3. Remove the field wiring cover (if available) from the unit
by loosening the screws.
4. Remove the caps on the conduit panel.
5. Connect the conduit to the conduit panel (see Fig. 12).
6. Properly connect both the power supply and control lines to
the terminal block per the connection diagram.
7. Ground the unit in accordance with NEC and local electrical
codes.
8. Use the lock nuts to secure the conduit.
9. Reinstall the field wiring cover.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
• Be sure to comply with local codes while running wire
from indoor unit to outdoor unit.
• Every wire must be connected firmly. Loose wiring may
cause the terminal to overheat or result in unit
malfunction. A fire hazard may also exist. Therefore,
ensure all wiring is tightly connected.
• No wire should be allowed to touch the refrigerant
tubing, compressor or any moving parts.
• Disconnecting means must be provided and shall be
located within sight and readily accessible from the air
conditioner.
• Connecting cable with conduit shall be routed through
hole in the conduit panel.
ELECTRICAL DATA
Outdoor unit
Terminal Blo/
Oyer 1
} m07)
/ Conduit panel
Conduit
Table 10—Multi—zone Outdoor Unit
UNIT SIZE SYSTEM VOLTAGE OPERATING VOLTAGE COMPRESSOR
VOLT / PHASE / HZ MAX / MIN* RLA FLA
18 10 0.74
24 15 0.9
30 208-230/1 /60 253 / 187 19 1.3
36 21 1.0x2
48 21 1.0x2
*Permissible limits of the voltage range at which the unit will operate satisfactorily
LEGEND
FLA - Full Load Amps
MCA - Minimum Circuit Amps
MOCP - Maximum Over Current Protection
RLA - Rated Load Amps
Ao7455
Fig. 12 — Field Wiring
OUTDOOR FAN
MCA
MOCP
HP
W
0.07
50
18
25
0.16
120
25
35
0.16
120
30
45
0.11
85
35
50
0.11
85
35
50
12
CONNECTION DIAGRAMS
0
u
Indoor Unit A
Indoor
Power Su
Supply
Sinal
Signal High
VDltag
Ground
208-230-1-60
Llj L2
$
I
GND
Indoor Unit B
Indoor
Power Su I
ppY
Unit B
Signal
High
Voltag
Ground
208-230-1-60
L1 I L2
S
I
GND®
r -- -- — —I r— — -- — —I
I I I I
I I I I
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208.230.1.60 :CONNECTING CABLE iCONNECTING CABLE
FIELD POWER SUPPLY IOUTDOORTOINDOORI IOUTDOORTOINDOORi
— I I
: C�
C::�
4D
C::�
1060151
I
4D:D
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C:'CC
Main Power to Indoor Power to Indoor
Power Suppl Ground Indoor Unit A unit A Indoor Unit B Unit B
Signal Signal
208-230-1-60 208-230-1-60 High 208-230-1-60 voltage
Fig. 13 — Connection Diagram Size 18K 2 Zone
Indoor Unit A
nor
nninor
Power Supply
Slgnal
Ground
206-230-1-60
High
VoIWg
L1 I L2
S
GND
Indoor Unit 11
Units
Indoor Unit C
Power Supply
Signal
High
Ground
Power Supply
2OB-230-t-60
odor
Signal
High
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PNE
S
GND
L1 L2
S
GND®
L L L LrF,--- -1
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L1 L2
L L1A L2(A)S(A)
Main
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Indoor
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Unit A
Unit
Signal
208-230-1-60
208-230-1-60
H'gh
Volta e
Q
0
L1BL2BSBL1CL2CSC
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Power to
Indoor
Indoor Unit B
Una
B Indoor Unit C
unit C
Signal
Signal
208-230-1-60
H
208-230-1-60
Hh
e
voe
9te
Fig. 14 — Connection Diagram Size 24K 3 Zone
Indoar UnlfA UnItA
Power Supply Signal Ground
High
20&23&160 Vorig
L1 L2 S GND
LL
I I
:CONNECTING CABLE
'rowansu OUTDOOR TO INDOOR
I
1
Indoor Unit B
l"d0°`
UnitB
Indoor Unit C
I"d40f
Un11C
Indoor Unit D
Indow
UnitD
Power SuDDN
Signal
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Power Supply
Signal
Ground
Power Supply
Signal
20&2301a0
208-230-1-fi0
HighGround
Voyage
208-230-1d0
High
Volb9
High
Voge9
L1 L2
S
GND
L1 L2
S
GND
L1 L2
S
GND®
I I I I I I
I I I I I I
CONNECTING CABLE I :CONNECTING CABLE :CONNECTING CABLE
OUTDOOR TO INDOOR I OUTDOOR TO INDOOR IOUTDOOR TO INDOOR
I I I I I I
0
O
...............WE
MOM
. ,.
;:;:
Ell ISM
..F&IMP:
:; FA
Ism
FA
.WIMENEWS
Fig. 15 — Connection Diagram Size 30K 4 Zone
J
13
CONNECTION DIAGRAMS (CONTINUED)
Indoor UnitA
Power Supply
UnaA
Signal
High
Von,
Ground
20B-230-1-60
L1 L2
S
GND®
Indoor Unit B
Indoor
Unit B
Indoor Unit C
Inaoor
Una C
Indoor Unit D
Indoor
Unit D
Power Supply
s nal
Ground
Power Supply
Si nal
Ground
Power Supply
Signal
Ground
208-230-1-60
High
Volta
20B-230-1-60
Hgh
VOltag
20&230760
Hreh
Voaag
-11 L2
I $
I GNDQ
L1 I L2
$
I
GND
L1 L2
S
GND
LLT- "I
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nEln vaveli'suaan IOUTDOOR TO INDOOR: :OUTDOOR TO INDOOR;
I I I I
I I I I
L _I
O O
L1 L2 -
O
Main
Power Suppl Ground
208-230-1-60
L1(A) L2(A) S(A) L1(B) L2(B) S(B
Power to
Indoor
power to
Indoor
Indoor Unit A
Una A
Indoor Unit
B Unit B
Signal
Signal
208-230-1-60
208-230-1-60
Hh
Vig a
Vora e
r_IH�—A,
I I
r—L�— A,
I I
I I
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I I
:CONNECTING CABLE
,OUTDOOR TO INDOOR,
I I
I I
i i
IOUTDOOR TO INDOORI
I I
I I
r I
Fig. 16 — Connection Diagram Size 36K 4 Zone
Indoor Unit A
Inaoor
Indoor Unit B
Indoo'
Indoor Unit C
Inaoor
ir
D
Indoor Unit E
Indoor
UnItE
Power Supply
Unit
si ial
Ground
Power SUPPIY
UngB
s nal
Ground
Power Supply
Unit
sgnal
Ground
al
Ground
Power SuDPIY
sl naI
Ground
206-230.1-60
High
Villag
208-230.1-6g
High
Vollag
208-230.1-60
g6
Villa
99�
208-230-160
Hgh
Vollag
L1 L2
S
GND
L1 L2
S
GND
L1 L2
S
GND
GND
L1 L2
S
GND
I I I
(CONNECTING CABLE I :CONNECTING CABLE
rowrnau (OUTDOOR TO INDOOR: :OUTDOOR TO INDOOR:
I I I :
O O
L1 L2 I
Main
Power Supply Ground
208-230-1-60
\I
\I
\I
\I
\I
\IMIEN
I I I I I I
(II
I:
I
II
I
ICONNECTING CABLE ICONNECTING CABLE :CONNECTING
CABLE
OUTDOOR TO INDOOR: :OUTDOOR TO INDOOR: :OUTDOOR TO INDOORI:
L L I L__
O _ I:I
mi
O
LI1:(rCr )I 2C.
I)S(C) L
I
1:(,Dr )IL2
(D.r)
4Ll(E)L2(E)S�(E)
Fig. 17 — Connection Diagram Size 48K 5 Zone
14
Fig. 17 — Connection Diagram Size 48K 5 Zone
14
DRAIN CONNECTIONS
Install drains must meet local sanitation codes.
Install the outdoor unit drain joint
Fit the seal into the drain joint, then insert the drain joint into the
base pan hole of the outdoor unit. Rotate 90' to securely assemble
them. Connect the drain joint with an extension drain hose to avoid
condensate from draining off the outdoor unit during the heating
mode.
Outdoor Unit Refrigerant Indoor Unit
Side F�
ig i e
Service Valve
A07360
Fig. 19 — Service Valve
Manifold Gage
0 UUUU 500 microns
W_* Low side valve O High side valve
Seal Drain joint Base pan hole
Charge hose—► Charge hose
'��( W/ i Vacuum pump
Seal
/7�fj
Base pan TDrain
joint Low side valve
Fig. 18 — Drain Joint A07361
Fig. 20 — Manifold
Images are for illustration purposes only.
SYSTEM VACUUM AND CHARGE
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.
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 following procedure is
followed. Always break a vacuum with dry nitrogen.
NOTE: All units (except the 18,000 BTU model) have a Master
Suction and Liquid Line Service Valve.
1. Completely tighten the flare nuts (A, B, C, D, E). Fully
open all circuits service valves. Connect the manifold gage
charge hose to the charge port of the low side Master service
valve to evacuate all circuits at the same time (see Fig. 19).
2. Connect the charge hose to the vacuum pump.
3. Open (fully) the low side of the manifold gage (see Fig. 20).
4. Start the vacuum pump.
5. Evacuate using either the deep vacuum or the triple
evacuation method.
6. After the evacuation is complete, fully close the low side of
manifold gage and stop the vacuum pump operation.
7. The factory charge, contained in the outdoor unit, is good
for up to 25 ft. (8 m) of line length. For refrigerant lines
longer than 25 ft. (8 m), add refrigerant, up to the allowable
length, as specified in the System Requirements section.
8. Disconnect the charge hose from the charge connection of
the low side service valve.
9. Securely tighten the service valves caps.
Deep Vacuum Method
The deep vacuum method requires a vacuum pump capable of
pulling a vacuum of 500 microns and a vacuum gage capable of
accurately measuring this vacuum depth. The deep vacuum method
is the most positive way of assuring a system is free of air and
liquid water (see Fig. 21).
to 3500
LEAK IN
p 3000
goo SYSTEM
U 2500
2000
1500
VACUUM TIGHT
TOO WET
1000
500
TIGHT
DRY SYSTEM
0 1 2 3 4 5 ti 7
MINUTES
Fig. 21 — Deep Vacuum Graph
95424
15
Triple Evacuation Method
The triple evacuation method should only be used when the
vacuum pump is only capable of pumping down to 28 in. of
mercury vacuum and system does not contain any liquid water.
Refer to Fig. 22 and proceed as follows:
1. Pump the system down to 28 in. of mercury and allow the
pump to continue operating for an additional 15 minutes.
2. Close the service valves and shut off the vacuum pump.
3. Connect a nitrogen cylinder and regulator to the system and
open until the system pressure is 2 psig.
4. Close the service valve and allow the system to stand for 1
hr. During this time, the dry nitrogen can diffuse throughout
the system absorbing moisture.
5. Repeat this procedure as indicated in Fig. 22. The system
will then be free of any contaminants and water vapor.
EVACUATE
BREAK VACUUM WITH DRY NITROGEN
WAIT
EVACUATE
BREAK VACUUM WITH DRY NITROGEN
WAIT
EVACUATE
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
RELEASE CHARGE INTO SYSTE
A95425
Fig. 22 — Triple Evacuation Method
Final Tubing Check
IMPORTANT: Ensure the factory tubing on both the 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 the
feeder tubes are secure and tight.
START-UP
Test Operation
Perform a test operation after completing a gas leak and electrical
safety check. See the indoor unit installation instructions and
owner's manual for additional start up information.
SYSTEM CHECKS
1. Conceal the tubing where possible.
2. Ensure the drain tube slopes downward along its entire
length.
3. Ensure all tubing and connections are properly insulated.
4. Fasten the tubes to the outside wall, when possible.
5. Seal the hole through which the cables and tubing pass.
OUTDOOR UNIT
1. Are there unusual noises or vibrations during operation?
Explain the Following Items to the Customer (with the aid of
the Owner's Manual):
2. Explain care and maintenance.
3. Present the installation instructions to the customer.
16
OUTDOOR UNIT DIAGNOSTIC GUIDES
For ease of service, the systems are equipped with a diagnostic code display LED on both the indoor and outdoor units. The outdoor
diagnostic is displayed on the outdoor unit microprocessor board. There may be a few error codes displayed in the indoor unit that might
relate to the outdoor unit's problems. If possible, always check the diagnostic codes displayed on the indoor unit first.
In standby, the LED displays "— —".
In the compressor operation, the LED displays the running frequency.
In the defrosting mode, the LED displays "dF" or alternative displays between the running frequency and "dF" (each appears for 0.5s).
During the compressor pre —heating cycle, the LED displays "PH" or alternative displays between the running frequency and "PH"(each
appears for 0.5s).
During the oil return process, the LED displays "RO" or alternative displays between the running frequency and "RO"(each appears for 0.5s).
In the low ambient cooling mode, the LED displays "LC" or alternative displays between the running frequency and "LC" (each appears for 0.5s).
In the forced cooling mode, the LED displays "FC" or alternative displays between the running frequency and "FC" (each appears for 0.5s).
When PFC module protection occurs three times within 15 minutes, the LED displays "E6" or alternative displays between the running
frequency and "E6" (each appears for 0.5s).
In protection or malfunction, the LED displays an error code or a protection code.
The diagnostic codes displayed on the outdoor units are listed on Table 11.
Table 11—Outdoor Unit Error Display
OUTDOOR UNIT
LED STATUS
INDOOR UNIT
DISPLAY
DISPLAY
EO
Outdoor EEPROM malfunction
F4
E2
Communication malfunction between indoor and outdoor units
E1
E3
Communication malfunction between IPM board and outdoor main board
--
E4
Open or short circuit of outdoor temperature sensor (T3, T4, T5, T26)
F2/F1 /F3/F6
E5
Voltage protection
P1
E6
PFC module protection
--
E8
Outdoor fan speed has been out of control (Only for DC fan motor models)
F5
E9
Wrong wiring connection of 24K indoor unit
--
F1
No A Indoor unit coil outlet temp. sensor or connector of sensor is defective
--
F2
No B Indoor unit coil outlet temp. sensor or connector of sensor is defective
--
F3
No C Indoor unit coil outlet temp. sensor or connector of sensor is defective
--
F4
No D Indoor unit coil outlet temp. sensor or connector of sensor is defective
--
F5
No E Indoor unit coil outlet temp. sensor or connector of sensor is defective
--
F6
No F Indoor unit coil outlet temp. sensor or connector of sensor is defective
--
PO
Temperature protection of compressor top
P2
Pi
High pressure protection
P2
P2
Low pressure protection
P2
P3
Current protection of compressor
FO
P4
Temperature protection of compressor discharge
--
P5
High temperature protection of condenser
--
P6
IPM module protection
PO
17
Copyright 2016 CAC/BDP. • 7310 W. Morris St. • Indianapolis, IN 46231 Edition Date: 07/16 Catalog No: 38MGR-01 SI
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: NEW
18