General Specification; Selecting Circuit Breaker And Wiring; Selecting The Pipe Material; Connection Pipe Requirement - Rheem RHMV4821SNACJA Manual De Instalación

3. GENERAL SPECIFICATION

3.1. Selecting circuit breaker and wiring

• Be sure to install a breaker of the specifi ed capacity.
• Regulation of cables and breaker differs from each locality, refer in accordance with
local rules.
Voltage rating
Operating range
Cable Cable size (AWG)
Power supply
AWG 16 to 14
cable
Select the correct cable type and size according to the country or region's regulations.
Cable Length: Limit voltage drop to less than 2%. Increase cable gauge if voltage drop is
2% or more.
MODEL
MINIMUM CIRCUIT AMPACITY
MAX. CKT. BKR. (MAXIMUM CIRCUIT BREAKER)
• Before starting work check that power is not being supplied to all poles of the indoor
unit and outdoor unit.
• Install all electrical works in accordance to the national standard.
• Install the disconnect device with a contact gap of at least 2/16 in (3 mm) in all poles
nearby the units. (Both indoor unit and outdoor unit)
• Install the circuit breaker nearby the units.

3.2. Selecting the pipe material

• Do not use existing pipes.
• Use pipes that have clean external and internal sides without any contamination
which may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or
water.
• It is necessary to use seamless copper pipes.
Material: Phosphor deoxidized seamless copper pipes.
It is desirable that the amount of residual oil is less than 40 mg/33ft (10m).
• Do not use copper pipes that have a collapsed, deformed, or discolored portion
(especially on the interior surface). Otherwise, the expansion valve or capillary tube
may become blocked with contaminants.
• Improper pipe selection will degrade performance. As an air conditioner using R410A
incurs pressure higher than when using conventional refrigerant, it is necessary to
choose adequate materials.
NOTE:
Thicknesses of copper pipes used with R410A are as shown in the table.
Never use copper pipes thinner than those indicated in the table even if they are available
on the market.
Thicknesses of Annealed Copper Pipes (R410A)
Pipe outside diameter [in (mm)]
3/8 (9.52)
5/8 (15.88)

3.3. Connection pipe requirement

If the pipe lengths and height differences are not kept as shown in the table, correct
operation cannot be guaranteed.
Diameter
Model
Liquid Gas
24 3/8 in (9.52 mm) 5/8 in (15.88 mm) 165 ft (50 m)
30 3/8 in (9.52 mm) 5/8 in (15.88 mm) 165 ft (50 m)
En-4
9374995721_IM.indb 4 9374995721_IM.indb 4
CAUTION
1 ø 208/230 V (60 Hz)
188-253 V
Cable type Remark
Sheathed PVC
2 wire + Earth (Ground)
cable
CAUTION
24 30
20.8 A 20.8 A
30 A 30 A
CAUTION
Thickness [in (mm)]
0.032 (0.80)
0.039 (1.00)
CAUTION
Maximum height
Pipe length
(between indoor
MAX. MIN.
and outdoor)
17 ft (5 m) 98 ft (30 m)
17 ft (5 m) 98 ft (30 m)

3.4. Additional charging

Refrigerant suitable for a piping length of 66 ft (20 m) is charged in the outdoor unit at the
factory.
When the piping is longer than 66 ft (20 m), additional charging is necessary.
For the additional amount, see the table below.
66 ft
Model Piping length
(20 m)
24/30 Additional charge None
CAUTION
When adding refrigerant, add the refrigerant from the charging port at the completion
of work.

4. INSTALLATION WORK

Make sure to obtain the customer's approval for selecting and installing the outdoor unit.

4.1. Selecting an installation location

WARNING
• Install at a place that can withstand the weight of the outdoor units and install
positively so that the units will not topple or fall.
• Be sure to install the outdoor unit as prescribed, so that it can withstand earthquakes
and typhoons or other strong winds. Improper installation can cause the unit to topple
or fall, or other accidents.
• Do not install the outdoor unit near the edge of a balcony. Otherwise, children may
climb onto the outdoor unit and fall off of the balcony.
CAUTION
• Do not install the outdoor unit in the following areas:
- Area with high salt content, such as at the seaside. It will deteriorate metal parts,
causing the parts to fail or the unit to leak water.
- Area fi 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, chlorine gas, acid, or alkali. It will cause the copper pipes and brazed
joints to corrode, which can cause refrigerant leakage.
- Area containing equipment that generates electromagnetic interference. It will cause
the control system to malfunction, preventing the unit from operating normally.
- Area that can cause combustible gas to leak, contains suspended carbon fi bers or
fl ammable dust, or volatile infl ammables such as paint thinner or gasoline. If gas
leaks and settles around the unit, it can cause a fi re.
- Area where small animals may live. It may cause failure, smoke or fi re if small
animals enter and touch internal electrical parts.
- Area where animals may urinate on the unit or ammonia may be generated.
• Do not tilt the outdoor unit more than 3 degrees.
• Install the outdoor unit in a well-ventilated location away from rain or direct sunlight.
• If the outdoor unit must be installed in an area within easy reach of the general public,
install as necessary a protective fence or the like to prevent their access.
• Install the outdoor unit in a location that would not inconvenience your neighbors, as
they could be affected by the airfl ow coming out from the outlet, noise, or vibration. If
it must be installed in proximity to your neighbors, be sure to obtain their approval.
• Do not install in an area that has heat sources, vapors, or the risk of leakage or
accumulation of fl ammable gas.
• If the outdoor unit is installed in a cold region that is affected by snow accumulation,
snow fall, or freezing, take appropriate measures to protect it from those elements.
To ensure a stable operation, install inlet and outlet ducts.
• Do not install the unit where a strong wind blows or where it is very dusty.
• Install the unit where keep away more than 3 m from the antenna of TV set and
Radio.
• If children under 10 years old may approach the unit, take preventive measures so
that they cannot reach the unit.
• Keep the length of the piping of the indoor and outdoor units within the allowable
range.
• Outdoor unit should be set to a place where both drainage and itself will not be
affected when heating.
• For maintenance purposes, do not bury the piping.

4.2. Installation dimensions

CAUTION
• The installation space shown in the following examples is based on an ambient
temperature under cooling operation of 95°F (35°C) (DB) at the air intake of the
outdoor unit. Provide more space around the air intake than shown in the examples if
the ambient temperature exceeds 95°F (35°C) (DB) or if the thermal load of all of the
outdoor units exceeds the capacity.
• Consider the transportation route, installation space, maintenance space, and access,
and install the unit in a location with suffi cient space for the refrigerant piping.
• Installation methods not shown in the following examples are not recommended.
Performance may drop signifi cantly.
98 ft 131 ft 165 ft
Rate
(30 m) (40 m) (50 m)
14 oz 1 lb 12 oz 2 lb 10 oz 0.43 oz/ft
(400 g) (800 g) (1200 g) (40 g)
12/11/2020 8:57:23 AM 12/11/2020 8:57:23 AM