Friedrich MR09C1F Installation Manual
Friedrich MR09C1F Installation Manual

Friedrich MR09C1F Installation Manual

Split type room air conditioner
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SPLIT TYPE ROOM AIR CONDITIONER

INSTALLATION MANUAL

(P/N 9314788017-01)
MODEL: MW12Y1F/MR12Y1F, MW12C1F/MR12C1F
(
MW09Y1F/MR09Y1F, MW09C1F/MR09C1F
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
WARNING:
can result in severe personal injury or death.
This symbol refers to a hazard or unsafe practice which
CAUTION:
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 mainte-
nance 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.
ENGLISH
)
• Connect all wiring tightly. Loose wiring may cause overheating at con-
nection points and a possible fire hazard.
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 abnor-
mal vibration.
...In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a metal frame. Pro-
vide 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 par-
ticular 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.
This air conditioner uses new refrigerant HFC (R410A).
The basic installation work procedures are the same as conventional refrigerant (R22) models.
However, pay careful attention to the following points:
(1) Since the working pressure is 1.6 times higher than that of conventional refrigerant(R22) models,
some of the piping and installation and service tools are special.(See the table below.)
Especially, when replacing a conventional refrigerant(R22) 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(R22) and for safety. Therefore, check
beforehand.[The charging port thread diameter for R410A is 1/2 threads per inch.]
(3) Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with
refrigerant(R22) models. Also, when storing the piping ,securely seal the opening 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.
Special tools for R410A
Tool name
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.
Gauge manifold
It is recommended the gauge with seals-0.1 to 5.3 MPa (-1 to 53 bar) for high pressure.
-0.1 to 3.8 MPa (-1 to 38 bar) for low pressure.
To increase pressure resistance, the hose material and base size were changed.
Charge hose
Vacuum pump
A conventional vacuum pump can be used by installing a vacuum pump adapter.
Gas leakage detector
Special gas leakage detector for HFC refrigerant R410A.
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/10m. Do not
use copper pipes having a collapsed, deformed or discolored
portion (especially on the interior surface). Otherwise, the ex-
pansion value or capillary tube may become blocked with con-
taminants.
As an air conditioner using R410A incurs pressure higher than
when using R22, it is necessary to choose adequate materials.
Thicknesses of copper pipes used with R410A are as shown in Table1.Never use copper pipes thinner than 0.8mm even
when it is available on the market.
(1) Do not use the existing (for R22) piping and flare nuts.
• If the existing materials are used, the pressure inside the refrigerant cycle will rise and cause breakage, injury,
etc.(Use the special R410A materials.)
(2) When installing and relocating the air conditioner, do not mix gases other than the specified refrigerant(R410A)
to enter the refrigerant cycle.
• If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an abnormally high value
and cause breakage, injury, etc.
When installing pipes shorter than 3m, sound of the outdoor unit will be transferred to the indoor unit, which will
cause large operating sound or some abnormal sound.
Contents of change
Table 1 Thicknesses of Annealed Copper Pipes
Nominal
Outer diameter
diameter
(mm)
1/4
6.35
3/8
9.52
WARNING
CAUTION
5 cm or over
Thickness (mm)
R410A
[ref.] R22
0.80
0.80
0.80
0.80

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Summary of Contents for Friedrich MR09C1F

  • Page 1: Installation Manual

    • If the existing materials are used, the pressure inside the refrigerant cycle will rise and cause breakage, injury, etc.(Use the special R410A materials.) (2) When installing and relocating the air conditioner, do not mix gases other than the specified refrigerant(R410A) to enter the refrigerant cycle.
  • Page 2: Indoor Unit

    INDOOR UNIT CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING Fig. 1 (1) Cut a 3-2/16’’(80 mm) diameter hole in the wall at the position shown in (Fig.1). (2) When cutting the wall hole at the inside of the installation frame, cut the hole within the range of the left and right center marks 3/8’’(10 mm) below the installation frame.
  • Page 3: Standard Accessories

    E. Clamps or saddles to secure refrigerant piping 3. OPERATING RANGE The following items are necessary to install this air conditioner. (The Table 4 items are not included with the air conditioner and must be purchased separately.) Heating Mode Cooling/Dry Mode Outdoor temperature About 32 to 115 °F...
  • Page 4: Outdoor Unit Installation

    OUTDOOR UNIT OUTDOOR UNIT INSTALLATION ● Set the unit on a strong stand, such as one made of concrete blocks (1) Install the unit where it will not be tilted by more to minimize shock and vibration. ● Do not set the unit directly on the ground because it will cause trou- ble.
  • Page 5 ELECTRICAL WIRING (INDOOR UNIT) HOW TO THE INSTALL THE INTER-UNIT WIRE HARNESS 1. Remove the screws, then remove the conduit holder. 2. Fasten the inter-unit wire harness to the conduit holder using the lock nut. IMPORTANT: Refer to fig. 20 about the length of inter-unit wire harness. 3.
  • Page 6: Test Running

    To end test operation, press the remote control unit START/STOP button. (1) Is there any abnormal noise and vibration during operation? (When the air conditioner is run by pressing the test run button, the OP- (2) Will noise, wind, or drain water from the unit disturb the...
  • Page 7: Pump Down Operation

    PUMP DOWN OPERATION To avoid discharging refrigerant into the atmosphere at the time of relocation or disposal, recover refrigerant by doing the cooling operation according to the following procedure. (1) Do the air purging of the charge hose by connecting the charging hose of gauge manifold to the charging port of 3 way valve and opening the low-pressure valve slightly.

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