ASU7RLF1 Installation Manual

En-2
2.4. Accessories
The following installation accessories are supplied. Use them as required.
Name and Shape Q’ty Name and Shape Q’ty
Operating Manual
1
Cloth tape
1
Installation Manual
(This manual)
1
Seal A
It is used when the diameter of
gas pipe is Ø1/2 in (12.70 mm)
or more.
It is necessary when using
AS15.
1
Tapping screw (large)
5
Wall hook bracket
1
Tapping screw (small)
2
Remote controller
1
Air cleaning filter
2
Battery
2
Filter holders
2
Remote controller holder
1
The following items are necessary to install this air conditioner. (The items are not includ-
ed with the air conditioner and must be purchased separately.)
Additional materials
Connection pipe assembly Saddle
Connection cable (4-conductor) Drain hose
Wall pipe Tapping screws
Decorative tape Sealant
Vinyl tape Putty
Wall cap
2.5. Optional parts
Refer to each installation manual for the method of installing optional parts.
Parts name Model No. Application
Wired Remote Controller UTY-RVNUM For air conditioner operation (3-wire type)
Wired Remote Controller UTY-RNNUM For air conditioner operation (3-wire type)
Simple Remote Controller UTY-RSNUM For air conditioner operation (3-wire type)
External connect kit UTY-XWZXZ5 For control input/output port
Communication kit UTY-XCBXZ2 For the installation of optional parts
3. GENERAL SPECIFICATIONS
This installation manual briefly 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
CAUTION
Refer to the installation manual for the outdoor unit for description of allowable pipe length
and height difference.
Model
Liquid pipe size (thickness)
[in (mm)]
Gas pipe size (thickness)
[in (mm)]
7, 9, 12 Ø1/4 (Ø6.35) Ø3/8 (Ø9.52)
15 Ø1/4 (Ø6.35) Ø1/2 (Ø12.70)
2. ABOUT THIS PRODUCT
2.1. Precautions for using R410A refrigerant
• The basic installation work procedures are the same as conventional refrigerant (R22)
models.
However, pay careful attention to the following points:
• 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. (Refer
to the following table.)
Especially, when replacing a conventional refrigerant (R22) model with a new refriger-
ant R410A model, always replace the conventional piping and fl are nuts with the
R410A piping and fl are nuts.
• Models that use refrigerant R410A have a different charging port thread diameter to
prevent erroneous charging with conventional refrigerant (R22) and for safety. There-
fore, check beforehand. [The charging port thread diameter for R410A is 1/2-20 UNF.]
• 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.
• 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 where refriger-
ant composition is stable.
2.2. Special tools for R410A
Tool name Contents of change
Gauge manifold
Pressure is high and cannot be measured with a R22
gauge. To prevent erroneous mixing of other refrigerants,
the diameter of each port has been changed.
It is recommended the gauge with seals -30 inHg to 768 psi
(-0.1 to 5.3 MPa) for high pressure.
-30 inHg to 551 psi (-0.1 to 3.8 MPa) for low pressure.
Charge hose
To increase pressure resistance, the hose material and base
size were changed.
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 0.004 oz/100 ft. (40 mg/10 m). Do not use copper pipes having a collapsed,
deformed or discolored portion (especially on the interior surface). Otherwise, the expansion
value or capillary tube may become blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when using R22, it is nec-
essary to choose adequate materials.
WARNING
• Do not use the existing (for R22) piping and fl are nuts.
If the existing materials are used, the pressure inside the refrigerant cycle will rise
and cause failure, injury, etc. (Use the special R410A materials.)
• Use (refi ll or replace with) specifi ed refrigerant (R410A) only. Use of unspecifi ed
refrigerant can cause product malfunction, burst, or injury.
• Do not mix any gas or impurities except specifi ed refrigerant (R410A). Infl ow of air
or application of unspecifi ed material makes the internal pressure of the refrigerant
cycle too high, and may cause product malfunction, burst of piping, or injury.
2.3. For authorized service personnel only.
WARNING
• For appropriate working of the air conditioner, install it as outlined in this manual.
• To connect the indoor unit and outdoor unit or branch box, use air conditioner piping
and cables available through your local distributor. This manual describes proper
connections using such installation set.
• Do not reconnect the power until all work has been completed.
CAUTION
This installation manual describes how to install the indoor unit only.
To install the outdoor unit or branch box, refer to the installation manual included with
the outdoor unit or branch box.
• Be careful not to scratch the air conditioner when handling it.
• After installation, explain correct operation to the customer, using the operating manual.
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