About This Product; General Specifications - Rheem RIWH12AVFJ Manuel D'installation

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. (See
the following table.)
Especially, when replacing a conventional refrigerant (R22) model with a new refrigerant
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 pre-
vent erroneous charging with conventional refrigerant (R22) and for safety. Therefore,
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 refrigerant
composition is stable.
2.2. Special tools for R410A
Tool name
Pressure is high and cannot be measured with a conven-
tional (R22) gauge. To prevent erroneous mixing of other
Gauge manifold 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.
To increase pressure resistance, the hose material and base
Charge hose
size were changed.
A conventional vacuum pump can be used by installing a
Vacuum pump
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.
• 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.)
• When installing and relocating the air conditioner, do not mix gases other than the
specifi ed 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 failure, injury, etc.
2.3. For authorized service personnel only.
• For the air conditioner to operate satisfactorily, install it as outlined in this installation
manual.
• Connect the indoor unit and outdoor unit or branch box with the air conditioner piping
and cables available from your local distributor. This installation manual describes
the correct connections using the installation set available from your local distributor.
• Do not turn on the power until all installation work is complete.
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.
En-2
Contents of change
WARNING
WARNING
CAUTION
2.4. Accessories
The following installation accessories are supplied. Use them as required.
Name and Shape
Operating manual
Installation manual
(This manual)
Tapping screw (large)
(M4 × 25 mm)
Tapping screw (small)
(M3 x 12 mm)
Air cleaning filter
Filter holder
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.)
Name
Connection pipe assembly
Connection cable (4-conductor)
Wall pipe
Decorative tape
Vinyl tape
2.5. 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
2.6. Optional parts
Refer to each installation manual for the method of installing optional parts.
Parts name
Wired Remote Controller*
Simple Remote Controller*
External connect kit*
Communication kit
* Optional communication kit is necessary for the installation.

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
Refer to the installation manual for the outdoor unit for description of allowable pipe length
and height difference.
Model
7, 9, 12 types
15 type
Q'ty Name and Shape
Cloth tape
1
Seal A
It is used when the diameter of
1
gas pipe is Ø1/2 in. (12.70 mm)
or more.
It is necessary when using
AS15.
Wall hook bracket
5
Remote controller
2
Battery
2
Remote controller holder
2
Q'ty Name
1 Wall cap
1 Saddle
1 Drain hose
1 Tapping screws
1 Sealant
Model No. Application
XRNNUM For air conditioner operation
XRSNUM For air conditioner operation
RXXWZXZ5 For control input/output port
For the installation of optional
RXXCBXZ2
parts
CAUTION
Diameter
Liquid pipe Gas pipe
1/4 in. (6.35 mm) 3/8 in. (9.52 mm)
1/4 in. (6.35 mm) 1/2 in. (12.70 mm)
Q'ty
1
1
1
1
2
1
Q'ty
1
1 set
1
1 set
1