Secure The Unit; Pipe Installation - 1; Pipe Connection - Rheem Classic Plus Série Manuel D'installation

3. 5. Secure the unit

• Install 4 anchor bolts at the locations indicated with arrows in the 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.
• 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 0.78 in (20 mm). (Refer to the fi gure.)
• If overturning prevention is required, purchase the necessary commercially available
items.
Bottom side
Fix securely with bolts on a solid block. (Use 4 sets of commercially available M10 bolt,
nut and washer.)
2 in. (50 mm) or over
• Do not install directly on the ground,
this may result in equipment failure.
Do not install the outdoor unit in two-stage where the drain water could freeze.
Otherwise the drainage from the upper unit may form ice and cause a malfunction of the
lower unit.
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 ex-
tremely cold climate. (For reverse cycle model only.)
In area with heavy snowfall, if the inlet and outlet of the outdoor unit is blocked with
snow, it might become diffi cult to get warm, and it is likely to cause product malfunc-
tion. Construct a canopy and a pedestal, or place the unit on a high stand that is locally
installed.
En-7
[Unit: in. (mm)]
25-9/16
(650)
4-ø1/2 (ø12) hole
Bolt
Nut
Block
CAUTION

4. PIPE INSTALLATION - 1

4. 1. Pipe connection

Do not use mineral oil on a fl ared part. Prevent mineral oil from getting into the system
as this would reduce the lifetime of the units.
While welding the pipes, be sure to blow dry nitrogen gas through them.
The maximum lengths of this product are shown in the table. If the units are further
apart than this, correct operation cannot be guaranteed.
4. 1. 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 [in. (mm)]
Flare tool for R410A,
clutch type
1/4 (6.35)
3/8 (9.52)
0 to 1/16
1/2 (12.70)
(0 to 0.5)
5/8 (15.88)
3/4 (19.05)
• When using conventional fl are tools to fl are R410A pipes, the dimension A should
be approximately 1/16 in. more than indicated in the table (for fl aring with R410A
fl are tools) to achieve the specifi ed fl aring. Use a thickness gauge to measure the
dimension A.
Width across fl ats
Pipe outside
diameter
[in. (mm)]
1/4 (6.35)
3/8 (9.52)
1/2 (12.70)
5/8 (15.88)
3/4 (19.05)
4. 1. 2. Bending pipes
To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of
curvature of 4 in. (100 mm) or more.
If the pipe is bent repeatedly at the same place, it will break.
• If pipes are shaped by hand, be careful not to collapse them.
• Do not bend the pipes at an angle of more than 90°.
• When pipes are repeatedly bent or stretched, the material will harden, making it
diffi cult to bend or stretch them any more.
• Do not bend or stretch the pipes more than 3 times.
4. 1. 3. Pipe connection
Be sure to install the pipe against the port on the indoor unit and the outdoor unit cor-
rectly. If the centering is improper, the fl are nut cannot be tightened smoothly.
If the fl are nut is forced to turn, the threads will be damaged.
Do not remove the fl are nut from the outdoor unit pipe until immediately before con-
necting the connection pipe.
After installing the piping, make sure that the connection pipes do not touch the
compressor or outer panel. If the pipes touch the compressor or outer panel, they will
vibrate and produce noise.
CAUTION
B
Die
A
Pipe
Dimension B
- 0.4
[in. (mm)]
3/8 (9.1)
1/2 (13.2)
5/8 (16.6)
3/4 (19.7)
15/16 (24.0)
Width across fl ats
of Flare nut
[in. (mm)]
11/16 (17)
7/8 (22)
1-1/32 (26)
1-5/32 (29)
1-13/32 (36)
CAUTION
CAUTION
0