General; Type Of Copper Pipe And Insulation Material; Additional Materials Required For Installation; Operating Range - Hitachi R410A Manuel D'installation

3. GENERAL

This INSTALLATION MANUAL brieÀ y outlines where and
how to install the air conditioning system. Please read over
the entire set of instructions for the indoor and outdoor units
and make sure all accessory parts listed are with the system
before beginning.

3.1. Type of copper pipe and insulation material

Copper tubing for connecting the outdoor unit to the indoor
unit and insulation material is available for purchase locally.
When you purchase them, please specify the following.
• Deoxidized annealed copper pipe for refrigerant piping as:
Refer to the Installation Manual for the outdoor unit
for description of allowable pipe length and height
difference.
MODEL
Liquid pipe
9,000/12,000
6.35 mm (1/4 in.)
BTU/h model
18,000
6.35 mm (1/4 in.)
BTU/h model
• 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 in.)
or thicker and if the expected humidity exceeds 80%,
use heat insulation that is 20 mm (25/32in.) or thicker.
If heat insulation is used that is not as thick as
speci¿ ed, 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).

3.2. Additional materials required for installation

A. Refrigeration (armored) tape
B. Insulated staples or clamps for connecting wire
(See your local electrical codes.)
C. Putty
D. Refrigeration lubricant
E. Clamps or saddles to secure refrigerant piping

3.3. Operating range

Cooling/Dry Mode
Temperature About 64 to 90 °F
Humidity About 80% or less
9374318438-05_IM.indb 5
CAUTION
Diameter
Gas pipe
9.52 mm (3/8 in.)
12.70 mm (1/2 in.)
CAUTION
Heating Mode
About 60 to 88°F

4. ELECTRICAL REQUIREMENT

Always make the air conditioner power supply a special
branch circuit and provide a special switch and receptacle. Do
not extend the power cable.
WARNING
Refer to local codes for acceptable cable type.
Cable Cable size
Connection cable 14AWG
Max. Cable Length: Limit voltage drop to less than 2%. In-
crease cable gauge if voltage drop is 2% or more.

5. SELECTING THE MOUNTING POSITION

Correct initial installation location is important because it is
dif¿ cult to move unit after it is installed.
WARNING
Select installation locations that can properly
support the weight of the indoor. Install the units
securely so that they do not topple or fall.
CAUTION
Do not install the unit in the following areas:
• Area with high salt content, such as at the sea-
side.
It will deteriorate metal parts, causing the parts
to fail or the unit to leak water.
• Area ¿ lled with mineral oil or containing a large
amount of splashed oil or steam, such as a
kitchen.
It will deteriorate plastic parts, causing the parts
to fail or the unit to leak water.
• Area that generates substances that adversely
affect the equipment, such as sulfuric gas, chlo-
rine gas, acid, or alkali.
It will cause the copper pipes and brazed joints
to corrode, which can cause refrigerant leakage.
• Area that can cause combustible gas to leak,
contains suspended carbon ¿ bers or À ammable
dust, or volatile inÀ ammables such as paint thin-
ner or gasoline.
If gas leaks and settles around the unit, it can
cause a ¿ re.
• Area where animals may urinate on the unit or
ammonia may be generated.
Do not use the unit for special purposes, such as
storing food, raising animals, growing plants, or
preserving precision devices or art objects.
It can degrade the quality of the preserved or stored
objects.
Do not install where there is the danger of
combustible gas leakage.
Do not install the unit near a source of heat, steam,
or À ammable gas.
Install the unit where drainage does not cause any
trouble.
Remarks
3 cable + Ground
1 208/230 V
En-5
9/10/2010 11:10:07 AM