Friedrich MR24UY3F Installation Instructions Manual

(PART NO. 9374747023)
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
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
l
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.
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.
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.
STANDARD PARTS
The following installation parts are furnished.
Use them as required.
Name and Shape Q ty Application
Drain pipe
1
For outdoor unit drain
piping work (May not be
supplied, depending on
Drain cap
the model.)
5
GENERAL
This INSTALLATION INSTRUCTION SHEET briefly outlines where and how to install the air conditioning system. Please read over the entire set of instruc-
tions for the indoor and outdoor units and make sure all accessory parts listed are with the system before beginning.

CONNECTION PIPE REQUIREMENT

The maximum lengths of this product are shown in the following table. If the units are further apart than this, correct
operation can not be guaranteed.
Diameter
Model Type
Liquid Gas
24,000 BTU/h class 9.52 mm (3/8 in.) 15.88 mm (5/8 in.)
36,000 BTU/h class 9.52 mm (3/8 in.) 15.88 mm (5/8 in.)
Use pipe with water-resistant heat insulation.
Install heat insulation around both the gas and liquid pipes. Failure to do so may cause water leaks.
Use heat insulation with heat resistance above 248 °F. (Reverse cycle model only)
In addition, if the humidity level at the installation location of the refrigerant piping is expected to exceed 70%, install heat
insulation around the refrigerant piping. If the expected humidity level is 70-80%, use heat insulation that is 15 mm (19/32") or
thicker and if the expected humidity exceeds 80%, use heat insulation that is 20 mm (13/16") or thicker.
If heat insulation is used that is not as thick as specified, condensation may form on the surface of the insulation.
In addition, use heat insulation with heat conductivity of 0.045 W/(m·K) or less (at 68 °F).
ADDITIONAL MATERIALS REQUIRED FOR INSTALLATION
(1) Refrigeration (armored) tape
(2) Insulated staples or clamps for connecting wire
(See your local electrical codes.)
(3) Putty
(4) Refrigeration lubricant
(5) Clamps or saddles to secure refrigerant piping
OPERATING RANGE
Temperature
Maximum
Cooling
24,000 BTU/h class
Minimum
36,000 BTU/h class
Maximum
Heating
Minimum
CAUTION
Maximum height
Pipe length
(between indoor
and outdoor)
MAX. MIN.
50 m (165 ft) 5 m (16 ft) 20 m (66 ft)
50 m (165 ft) 5 m (16 ft) 30 m (98 ft)
CAUTION
Indoor air intake Outdoor air intake
90 °F DB 115 °F DB
65 °F DB 0 °F DB
86 °F DB or less 75 °F DB
„ 14 °F DB
Indoor humidity about 80% or less