Carrier 40MFC, 38MFC, 40MFQ, 38MFQ, DACMA Installation Instructions Manual

40MFC / 38MFC
40MFQ / 38MFQ
High---Wall Ductless Split System
Sizes 009 to 022

Installation Instructions

NOTE: Read the entire instruction manual before starting the
installation.

TABLE OF CONTENTS

PAGE

PARTS L IST 2.......................................

MODEL NUMBER NOMENCLATURE 2.................

SAFETY CONSIDERATIONS 3.........................

SYSTEM REQUIREMENTS 3..........................

DIMENSIONS 5......................................

CLEARANCES 6.....................................

INSTALLATION TIPS 7...............................

INDOOR UNIT INSTALLATION 7.......................

OUTDOOR UNIT INSTALLATION 8.....................

INSTALL ALL POWER AND INTERCONNECTING WIRING

TO OUTDOOR UNIT 8................................

ELECTRICAL DATA 9................................

CONNECTION DIAGRAMS 9..........................

INSTALL ALL POWER, INTERCONNECTING WIRING,

AND PIPING TO INDOOR UNIT 10.....................

REMOTE CONTROL INSTALLATION 10.................

SYSTEM VACUUM AND CHARGE 11...................

START--UP 12........................................

TROUBLESHOOTING 13..............................

PARTS LIS T

Part

No.

1 Indoor Unit 1
2 Mounting Plate 1
3 M o u n t ing S c r e w A S T 3 . 9 x 2 5 --- C --- H 5
4 Anchor 5
5 Air Filter 1
6 Remote Control 1
7 Remote Control Holder 1
8 M o u n t ing S c r e w B S T 2 . 0 x 1 0 --- C --- H 2
9 Outdoor Unit 1

Name of P art Qty

■ Indoor

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■ Outdoor

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Air Outlet

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9

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 bef ore i t
enters the wall to the indoor unit. This will ensure that rain will drip 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.

A14342

MODEL NUMBER NOMENCLATURE

38 MFC 009 - - - 1

Voltage
1 = 115-1-60Hz;
3 = 208-230-1-60Hz

System’s nominal capacity in 1000 BTU/Hr
Example: 009 = 9000 BTU/Hr

System’s type:
MFC = Air Conditioner;

MFQ = Heat pump
Equipment type:
40 = Indoor unit;
38 = Outdoor unit

Blank

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
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 h azards 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.

. When you see this symbol on the unit and

WARNING

!

WARNING

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.

!

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.

SYSTEM REQUIREMENTS

Allow sufficient space for airflow and servicing unit. See Fig. 1
and 4 for minimum required distances between unit and walls or
ceilings.

Piping

IMPORTANT: Both refrigerant lines must be insulated
separately.

S Minimum refrigerant line length between the indoor and outdoor

units is 10 ft. (3 m).

S The following maximum lengths are allowed:

REFRIGERANT LINE LENGTHS ft. (m)

Unit Size Max Line Length

9K 65 (20) 25 (8) 25 (8)

12K 65 (20) 25 (8) 25 (8)
17K HP 65 (20) 30 (10) 30 (10)
18K AC 65 (20) 30 (10) 30 (10)

22K 98 (30) 30 (10) 30 (10)

S The following are the piping sizes.

PIPE SIZES (in)

Unit Size Mix Phase Vapo r

9K 1/4 3/8

12K 1/4 1/2
17K HP 1/4 1/2
18K AC 1/4 1/2

22K 3/8 5/8

Refrigerant Charge

REFRIGERANT CHARGE lb. (kg)

Unit Size Air Conditioner (AC)

9K 1.34 (0.61) 2.70 (1.18)

12K 1.43 (0.65) 2.70 (1.18)
17K HP NA 2.87 (1.30)
18K AC 1.87 (0.85) NA

22K 2.60 (1.18) 3.52 (1.60)

S Above charge is for piping runs up to 25 ft. (7.6 m).
S For piping runs greater than 25 ft. (7.6 m), add refrigerant

up to the allowable length as specified below:

ADDITIONAL REFRIGERANT CHARGE

Unit Size oz./ft. (g/m)

9K --- 18K 0.16 (15)

22K 0.32 (30)

S Capillary tubes in outdoor unit are used as metering devices.

Max Elevation

(ID over OD)

Max Elevation

(OD over ID)

Heat Pump (HP)

3

Recommended Connection Method for Power and
cation Wiring (To minimize communication wiring
ence)

Power Wiring:

The main power is supplied to the outdoor unit. The field supplied
connecting cable from the outdoor unit to 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.

Consult your local building codes and the NEC (National
Electrical Code) or CEC (Canadian Electrical Code) for special
requirements.

All wires must be sized per NEC or CEC and local codes. Use
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 copper conductors with a minimum 300 volt
rating and 2/64 --inch thick insulation must be used.

Communication Wiring:

A separate shielded copper conductor only, with a minimum 300
volt rating and 2/64--inch thick insulation, must be used as the
communication wire from the outdoor unit to the indoor unit.

To minimize voltage drop of the control wire, use the following
wire size and maximum lengths shown in the chart below:

Wire Size

18 AWG 50 (15)
16 AWG 50 (15) to 100 (30)

Communi-

interfer-

Length

ft (m)

Alternate Connection Method for Power and Communication
Wiring (May not prevent communication wiring interfer

The main power is supplied to the outdoor unit. The field supplied
connecting cable from the outdoor unit to indoor unit consists of
four (4) wires and provides the power and communication signals
for the indoor unit. Two conductors are for power wiring (L1/L2,
or L/N), one is a ground wire, and one is a DC communication
wire.

Consult your local building codes and the NEC (National
Electrical Code) or CEC (Canadian Electrical Code) for special
requirements. All power wires must be sized per NEC or CEC and
local codes. Use 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 copper conductors with a minimum 300 volt
rating and 2/64 --inch thick insulation must be used.

!

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 300 volt

rating and 2/64 inch thick insulation.

CAUTION

ence)

4

DIMENSIONS -- INDOOR

Unit Size W in (mm) D in (mm) H in (mm) Operating Weight lb (kg)

9K 26.8 (680) 7.0 (178) 10.0 (255) 15.4 (7)

12K 30.3 (770) 7.4 (188) 10.0 (255) 16.5 (7.5)

17K HP / 18K AC 35.6 (905) 7.8 (198) 10.8 (275) 19.8 (9)

22K 40.6 (1030) 8.6 (218) 12.4 (315) 26.4 (12)

DIMENSIONS -- OUTDOOR

A14343

L1

L2

Model W in (mm) D in (mm) H in (mm) L1 in (mm) L2 in (mm)

9K/12K 30.7 (780) 9.84 (250) 21.2 (540) 21.61 (549) 10.87 (276) 70.5 (32.0)

17K HP / 18K AC 29.9 (760) 11.2 (285) 23.2 (590) 20.87 (530) 11.42 (290) 82.7 (37.5)

22K 33.3 (845) 12.6 (320) 27.6 (700) 22.05 (560) 13.19 (335) 103.6 (47.0)

D

Operating

Weight lb (kg)

A14344

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