Drain Installation; Secure The Unit; Pipe Installation; Brazing - Rheem RHMV4821SNACJA Manual De Instalación

4.4. Drain installation

• Perform drain work in accordance with this Manual, and ensure that the drain water
is properly drained. If the drain work is not carried out correctly, water may drip down
from the unit, wetting the furniture.
• When the outdoor temperature is 32 °F (0 °C) or less, do not use the accessory drain
pipe and drain cap. If the drain pipe and drain cap are used, the drain water in the
pipe may freeze in extremely cold weather. (Reverse cycle model only)
• Please set up the outdoor unit in a high place and please do not arrange the frame of
installed stand under the drain port, because the water dropped from the drain port
repeats freezing and accumulating, and may block the drain port.
• In the area with heavy snowfall, if the intake and outlet of outdoor unit is blocked with
snow, it is likely to cause of the breakdown. Please construct a canopy and a pedestal
or place the unit on a high stand (local confi gured).
AIR
Bottom side
Drain pipe mounting place
• Since the drain water fl ows out of the outdoor unit during heating operation, install the
drain pipe and connect it to a commercial 5/8 in (16 mm) hose. (Reverse cycle model
only)
• When installing the drain pipe, plug all the holes other than the drain pipe mounting
hole in the bottom of the outdoor unit with Drain cap (accessories) so there is no water
leakage. (Reverse cycle model only)
Drain pipe mounting hole

4.5. Secure the unit

• Install the unit where it will not be tilted by more than 3°. However, do not install the
unit with it tilted towards the side containing the compressor.
• When installing the outdoor unit where it may exposed to strong wind, fasten it securely.
5-3/16
(132)
1-15/16
(50)
• Install 4 anchor bolts at the locations indicated with arrows in the above fi gure.
• To reduce vibration, do not install the unit directly on the ground. Install it on a secure
base (such as concrete blocks).
• The foundation shall support the legs of the unit and have a width of 2 in (50 mm) or more.
• Depending on the installation conditions, the outdoor unit may spread its vibration
during operation, which may cause noise and vibration. Therefore, attach damping
materials (such as damping pads) to the outdoor unit during installation.
• Install the foundation, making sure that there is enough space for installing the
connection pipes.
En-6
9374995721_IM.indb 6 9374995721_IM.indb 6
CAUTION
Drain cap mounting place
Base
Drain pipe (accessory)
WARNING
[Unit: in (mm)]
25-9/16 4-11/16
(650) (119)
AIR 1-15/16
(50)
4 - Φ 12 Hole
• Secure the unit to a solid block using foundation bolts. (Use 4 sets of commercially
available M10 bolts, nuts, and washers.)
• The bolts should protrude 13/16 in (20 mm).
(Refer to the fi gure below.)
• If overturning prevention is required, purchase the necessary commercially available
items.
Fix securely with bolts on a solid block.

5. PIPE INSTALLATION

5.1. Brazing

CAUTION
• If air or another type of refrigerant enters the refrigeration cycle, the internal pressure
in the refrigeration cycle will become abnormally high and prevent the unit from
exerting its full performance.
• Apply nitrogen gas while brazing the pipes. If a pipe is brazed without applying
nitrogen gas, an oxidation fi lm will be created.
This can degrade performance or damage the
parts in the unit (such as the compressor or
valves).
Nitrogen gas pressure: 0.02 MPa
(= pressure felt suffi ciently on
the back of the hand)
• For brazing material, use phosphor copper that does not require fl ux. Do not use fl ux
to braze pipes. If the fl ux is the chlorine type, it will cause the pipes to corrode.
Furthermore, if the fl ux contains fl uoride, it will adversely affect the refrigerant pipe
system such as by degrading the refrigerant.
If fl uoride is contained, quality of refrigerant deteriorates and affects the refrigerant
piping system.

5.2. Flare connection (pipe connection)

5.2.1. Flaring
Use special pipe cutter and fl are tool exclusive for R410A.
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that the cuttings will not enter the pipe and remove any
burrs.
(3) Insert the fl are nut (always use the fl are nut attached to the indoor and outdoor
units respectively) onto the pipe and perform the fl are processing with a fl are tool.
Leakage of refrigerant may result if other fl are nuts are used.
(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from
entering the pipes.
Check if [L] is fl ared uniformly
and is not cracked or scratched.
L
Dimension A [in (mm)]
Pipe outside diameter
Flare tool for R410A,
[in (mm)]
clutch type
3/8 (9.52)
0 to 0.020
(0 to 0.5)
5/8 (15.88)
Bolt
Nut
Base
Pressure regulating valve
Cap
Nitrogen gas
Brazing area
B
Die
A
Pipe
Dimension B [in (mm)]
1/2 (13.2)
3/4 (19.7)
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