About This Product; Precautions For Using R410A Refrigerant; Special Tools For R410A Refrigerant; Accessories - Rheem RHMV4821SNACJA Manual De Instalación

• To connect the indoor unit and outdoor unit, use air conditioner piping and cables
available locally as standard parts.
This manual describes proper connections using such installation set.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service
agent or similarly qualifi ed persons in order to avoid a hazard.
• Do not use an extension cable.
• Do not modify power cable, use extension cable or branch wiring. Improper use may
cause electric shock or fi re by poor connection, insuffi cient insulation or over current.
• Do not purge the air with refrigerants but use a vacuum pump to vacuum the
installation.
• There is no extra refrigerant in the outdoor unit for air purging.
• Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacturer.
• The appliance shall be stored in a room without continuously operating ignition
sources (for example: open fl ames, an operating gas appliance or an operating
electric heater.)
• Using the same vacuum pump for different refrigerants may damage the vacuum
pump or the unit.
• Use a clean gauge manifold, vacuum pump and charging hose for R410A exclusively.
• Do not modify this unit, such as opening a hole in the cabinet.
• During the pump-down operation, make sure that the compressor is turned off before
you remove the refrigerant piping.
Do not remove the connection pipe while the compressor is in operation with 2-way or
3-way valves open. This may cause abnormal pressure in the refrigeration cycle that
leads to rupture and even injury.
• Dispose of the packing materials safely. Tear and dispose of the plastic packing bags
so that children cannot play with them. There is the danger of suffocation if children
play with the original plastic bags.
• This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety. Children should be supervised to ensure that they
do not play with the appliance.
• To avoid danger of suffocation, keep the plastic bag or thin fi lm used as the packaging
material away from young children.
• Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
• This unit must be installed by qualifi ed personnel with a capacity certifi cation of
handling refrigerant fl uids. Refer to regulation and laws in use on installation place.
• Install the unit by following local codes and regulations in force in the place of
installation, and the installation instructions of the manufacturer.
• This unit is part of a set constituting an air conditioner. The unit must not be installed
alone or be installed with device not authorized by the manufacturer.
• When installing pipes shorter than 5 m, sound of the outdoor unit will be transferred to
the indoor unit, which will cause large operating sound or some abnormal sound.
• Always use a separate power supply line protected by a circuit breaker operating on
all wires with a distance between contact of 3mm for this unit.
• To protect the persons, earth (ground) the unit correctly, and use the power cable
combined with an Earth Leakage Circuit Breaker (ELCB).
• The units are not explosion proof, and therefore should not be installed in explosive
atmosphere.
• This unit contains no user-serviceable parts. Always consult experienced service
technician for repairing.
• When moving or relocating the air conditioner, consult experienced service
technicians for disconnection and installation of the unit.
• Children should be monitored to ensure they do not play with the device.
• Do not touch the aluminum fi ns of Condenser coil and Evaporator coil built-in the
indoor or outdoor unit to avoid personal injury when you install or maintain the unit.
• Do not place any other electrical products or household belongings under indoor unit
or outdoor unit. Dripping condensation from the unit might get them wet, and may
cause damage or malfunction of your property.

2. ABOUT THIS PRODUCT

2.1. Precautions for using R410A refrigerant

• Do not introduce any substance other than the prescribed refrigerant into the
refrigeration cycle. If air enters the refrigeration cycle, the pressure in the refrigeration
cycle will become abnormally high and cause the piping to rupture.
• If there is a refrigerant leak, make sure that it does not exceed the concentration limit.
If a refrigerant leak exceeds the concentration limit, it can lead to accidents such as
oxygen starvation.
• Do not touch refrigerant that has leaked from the refrigerant pipe connections or other
areas. Touching the refrigerant directly can cause frostbite.
• If a refrigerant leak occurs during operation, immediately vacate the premises and
thoroughly ventilate the area. If the refrigerant comes in contact with a fl ame, it
produces a toxic gas.
• The basic installation work procedures are the same as conventional refrigerant
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 table below.)
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.
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CAUTION
WARNING
- 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
1/2-20 UNF.]
- Be careful that foreign matter (oil, water, etc.) does not enter the piping than with
refrigerant models. Also, when storing the piping, securely seal the openings 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 refrigerant

WARNING
To install a unit that uses R410A refrigerant, use dedicated tools and piping materials
that have been manufactured specifically for R410A use. Because the pressure of
R410A refrigerant is approximately 1.6 times higher than R22, failure to use dedicated
piping material or improper installation can cause rupture or injury. Furthermore, it can
cause serious accidents such as water leakage, electric shock, or fire.
Tool name
Gauge manifold 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.
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.
Charging 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.

2.3. Accessories

WARNING
For installation purposes, be sure to use the parts supplied by the manufacturer or other
prescribed parts. The use of non-prescribed parts can cause serious accidents such as
the unit falling, water leakage, electric shock, or fi re.
Following installation parts are supplied. Use them as required.
Keep this manual in a safe place, and do not discard any other accessories until the
installation work has been completed.
Name and shape
Installation
manual
Drain pipe
Drain cap
The following items are necessary to install this air conditioner. (The items are not
included with the air conditioner and must be purchased separately.)
Name
Connection pipe assembly Decorative tape
Connection cable Vinyl tape
Wall pipe Wall cap

2.4. Operating range

Outdoor Cooling/Dry Mode
-5 to 115°F
Temperature
(-20 to 46°C)
• If operated at a temperature beyond the specifi ed operating range, a protection circuit
may be activated to stop the operation of the unit.
Changes
Q'ty Description
This manual
1
(Reverse cycle model only)
1
—
5
Saddle Tapping screws
Drain hose Sealant
M10 bold, nut
Heating Mode
-5 to 75°F
(-20 to 24°C)
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