Friedrich MR24DYF, M36QYF Installation Manual
SPLIT TYPE ROOM AIR CONDITIONER
INSTALLATION INSTRUCTION
SHEET
(PART NO. 9374747030)
For authorized service personnel only.
This installation instruction sheet describes how to install the outdoor unit only. To install the indoor unit, refer to the installation instruction sheet included with
the indoor unit.
IMPORTANT!
Please Read Before Starting
This air conditioning system meets strict safety and operating standards.
As the installer or service person, it is an important part of your job to
install or service the system so it operates safely and efficiently.
For safe installation and trouble-free operation, you must:
•
Carefully read this instruction booklet before beginning.
•
Follow each installation or repair step exactly as shown.
•
Observe all local, state, and national electrical codes.
•
Pay close attention to all danger, warning, and caution notices given in
this manual.
This symbol refers to a hazard or unsafe practice which
can result in severe personal injury or death.
This symbol refers to a hazard or unsafe practice which
can result in personal injury and the potential for
product or property damage.
•
Hazel alerting symbols
Electrical
Safety / alert
If Necessary, Get Help
These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our
sales/service outlet or your certified dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for improper installation
or maintenance service, including failure to follow the instructions in this
document.
SPECIAL PRECAUTIONS
When Wiring
ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR
DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD
ATTEMPT TO WIRE THIS SYSTEM.
•
Do not supply power to the unit until all wiring and tubing are completed or
reconnected and checked.
•
Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.
•
Ground the unit following local electrical codes.
•
Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.
WARNING:
CAUTION:
When Transporting
Be careful when picking up and moving the indoor and outdoor units. Get
a partner to help, and bend your knees when lifting to reduce strain on
your back. Sharp edges or thin aluminum fins on the air conditioner can
cut your fingers.
When Installing...
...In a Ceiling or Wall
Make sure the ceiling/wall is strong enough to hold the unit’s weight. It
may be necessary to construct a strong wood or metal frame to provide
added support.
...In a Room
Properly insulate any tubing run inside a room to prevent “sweating” that
can cause dripping and water damage to walls and floors.
...In Moist or Uneven Locations
Use a raised concrete pad or concrete blocks to provide a solid, level
foundation for the outdoor unit. This prevents water damage and abnormal vibration.
...In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a metal frame.
Provide a suitable air baffle.
...In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher than drifting
snow. Provide snow vents.
When Connecting Refrigerant Tubing
•
Keep all tubing runs as short as possible.
•
Use the flare method for connecting tubing.
•
Apply refrigerant lubricant to the matching surfaces of the flare and
union tubes before connecting them, then tighten the nut with a torque
wrench for a leak-free connection.
•
Check carefully for leaks before starting the test run.
NOTE:
Depending on the system type, liquid and gas lines may be either narrow
or wide. Therefore, to avoid confusion the refrigerant tubing for your
particular model is specified as either “small” or “large” rather than as
“liquid” or “gas”.
When Servicing
•
Turn the power OFF at the main circuit breaker panel before opening
the unit to check or repair electrical parts and wiring.
•
Keep your fingers and clothing away from any moving parts.
•
Clean up the site after you finish, remembering to check that no metal
scraps or bits of wiring have been left inside the unit being serviced.
•
After installation, explain correct operation to the customer, using the
operating manual.
DANGER
Never touch electrical components immediately after the power supply has been turned off. Electrical shock may occur. After
turning off the power, always wait 5 minutes or more before touching electrical components.
WARNING
1 For the room air conditioner to operate satisfactorily, install it as outlined in this installation instruction sheet.
2 Connect the indoor unit and outdoor unit with the room air conditioner piping and cords available standards parts. This
installation instruction sheet describes the correct connections using the installation set available from our standard parts.
3 Installation work must be performed in accordance with national wiring standards by authorized personnel only.
4 Also, do not use an extension cord.
5 Do not turn on the power until all installation work is complete.
6 Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation.
7 There is not extra refrigerant in the outdoor unit for air purging.
8 Use a vacuum pump for R410A exclusively.
9 Using the same vacuum pump for different refrigerants may damage the vacuum pump or the unit.
0 Use a clean gauge manifold and charging hose for R410A exclusively.
A If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contact with a flame,
it produces a toxic gas.
••
••
• Be careful not to scratch the room air conditioner when handling it.
••
••
• After installation, explain correct operation to the customer, using the operating manual.
••
••
• Let the customer keep this installation instruction sheet because it is used when the room air conditioner is serviced or moved.
Use
For outdoor unit drain piping
work
Q’ty
1
5
Name and Shape
Drain pipe
Drain cap
STANDARD PARTS
The following installation parts are furnished. Use them as required.
Use
For use when connecting
models 9–12 to outdoor port A
Q’ty
1
Name and Shape
Adapter assy
12.7 mm / 9.52 mm
(1/2 in.) (3/8 in.)
36 type only
OPERATING RANGE
Temperature Indoor air intake Outdoor air intake
Cooling
Maximum 90 °F DB 115 °F DB
Minimum 65 °F DB 32 °F DB
Heating
Maximum 86 °F DB or less 75 °F DB
Minimum — 14 °F DB
Indoor humidity about 80% or less
Special tools for R410A
This air conditioner uses new refrigerant HFC (R410A).
The basic installation work procedures are the same as conventional refrigerant models.
However, pay careful attention to the following points:
1 Since the working pressure is 1.6 times higher than that of conventional refrigerant models, some of the piping and
installation and service tools are special. (See the table below.)
Especially, when replacing a conventional refrigerant model with a new refrigerant R410A model, always replace the
conventional piping and flare nuts with the R410A piping and flare nuts.
2 Models that use refrigerant R410A have a different charging port thread diameter to prevent erroneous charging with
conventional refrigerant and for safety. Therefore, check beforehand. [The charging port thread diameter for R410A is
1/2 UNF 20 threads per inch.]
3 Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with refrigerant models. Also, when
storing the piping, securely seal the openings by pinching, taping, etc.
4 When charging the refrigerant, take into account the slight change in the composition of the gas and liquid phases, and
always charge from the liquid phase side whose composition is stable.
Contents of change
Pressure is high and cannot be measured with a conventional gauge. To prevent erroneous mixing of other
refrigerants, the diameter of each port has been changed.
It is recommended the gauge with seals –0.1 to 5.3 MPa (–76 cmHg to 53 kgf/cm
2
) for high pressure. –0.1 to
3.8 MPa (–76 cmHg to 38 kgf/cm
2
) for low pressure.
To increase pressure resistance, the hose material and base size were changed.
A conventional vacuum pump can be used by installing a vacuum pump adapter.
Special gas leakage detector for HFC refrigerant R410A.
Tool name
Gauge manifold
Charge hose
Vacuum pump
Gas leakage detector
Copper pipes
It is necessary to use seamless copper pipes and it is desirable that the amount of
residual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed,
deformed or discolored portion (especially on the interior surface). Otherwise,
the expansion valve or capillary tube may become blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when using
conventional refrigerant, it is necessary to choose adequate materials.
Thicknesses of copper pipes used with R410A are as shown in the table. Never
use copper pipes thinner than that in the table even when it is available on
the market.
Pipe outside diameter
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
12.70 mm (1/2 in.)
15.88 mm (5/8 in.)
19.05 mm (3/4 in.)
Thickness
0.80 mm (1/32 in.)
0.80 mm (1/32 in.)
0.80 mm (1/32 in.)
1.00 mm (5/128 in.)
1.20 mm (3/64 in.)
Thicknesses of Annealed Copper Pipes (R410A)
*
If the space is larger than that is stated, the condition will be the
same as that there are no obstacles.
250 mm (10")
or more
(Service space)
SELECTING THE MOUNTING POSITION
WARNING
Select installation locations that can properly support the weight of the indoor and outdoor units. Install the units securely so
that they do not topple or fall.
CAUTION
1 Do not install where there is the danger of combustible gas leakage.
2 Do not install the unit near heat source of heat, steam, or flammable gas.
3 If children under 10 years old may approach the unit, take preventive measures so that they cannot reach the unit.
WARNING
1 Install the unit where it will not be tilted by more than 3˚. However, do not install the unit with it tilted towards the side
containing the compressor.
2 When installing the outdoor unit where it may exposed to strong wind, fasten it securely.
Decide the mounting position with the customer as follows:
(1) Install the outdoor unit in a location which can withstand the weight of the unit and vibration, and which can install horizontally.
(2) Provide the indicated space to ensure good airflow.
(3) If possible, do not install the unit where it will be exposed to direct sunlight.
(If necessary, install a blind that does not interfere with the airflow.)
(4) Do not install the unit near a source of heat, steam, or flammable gas.
(5) During heating operation, drain water flows from the outdoor unit.
Therefore, install the outdoor unit in a place where the drain water flow will not be obstructed. (Reverse cycle model only)
(6) Do not install the unit where strong wind blows or where it is very dusty.
(7) Do not install the unit where people pass.
(8) Install the outdoor unit in a place where it will be free from being dirty or getting wet by rain as much as possible.
(9) Install the unit where connection to the indoor unit is easy.
••
••
• When there are obstacles at the back side.
••
••
• When there are obstacles at the back and front sides.
••
••
• When there are obstacles at the back side with the installation of
more than one unit.
AIR
100 mm (4")
or more
250 mm (10")
or more
250 mm (10")
or more
100-300 mm*
(4"-12")
300 mm (12")
or more
600-1000 mm*
(24"-40")
••
••
• When there are obstacles at the back, side(s), and top.
600 mm (24")
or more
100 mm (4")
or more
300 mm (12")
or more
SYSTEM LAYOUT
Layout example for the indoor units and outdoor unit
UNIT D
9-12
UNIT C
9-12
UNIT B
9-12
UNIT A
9-18
a
b
c
d
H
H
H
Circuit breaker
OUTDOOR UNIT
Power source
208/230 V ~ 60 Hz
Power cord
Connection cord
Refrigerant pipe
36 type
INDOOR UNITS
Connectable model name
9 – 12
9 – 12
9 – 12
9 – 12
*1
/18
D 6.35/9.52
C 6.35/9.52
B 6.35/9.52
A 6.35/12.7
1. CONNECTABLE INDOOR UNIT CAPACITY TYPE
CAUTION
• The total capacity of the indoor units connected must be between 27,000 and 36,000 BTU. (Refer to the Table.)
Ex. Maximum connection of four indoor units: 9,000+9,000+9,000+9,000=36,000
• If the total capacity of the connected indoor units exceeds 36,000 BTU, an error will be displayed and the units will not operate.
(For information on error displays, refer to the installation instruction sheets included with the indoor units.)
• To install an indoor unit, refer to the installation instruction sheet included with the indoor unit.
• At least three indoor units must be connected to the outdoor unit.
*1 When connecting models 9–12 to the outdoor unit, the included adapter is necessary. (For
more information, refer to “2-4 HOW TO USE ADAPTER”.)
Outdoor port
Standard port size
UNIT D ø6.35, ø9.52
UNIT C ø6.35, ø9.52
UNIT B ø6.35, ø9.52
UNIT A ø6.35, ø12.7
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