Installation Procedure; Connecting The Pipe; Outdoor Unit Installation - Friedrich MR24UY3F Installation Instructions Manual

When there are obstacles at the back and front sides.
AIR
When there are obstacles at the back, side(s), and top.
When there are obstacles at the back side with the installation of
more than one unit.
* If the space is larger than that is stated, the condition
will be the same as that there are no obstacles.

INSTALLATION PROCEDURE

1
OUTDOOR UNIT
INSTALLATION
1. OUTDOOR UNIT PROCESSING
(1) Outdoor unit to be fasten with bolts at the four places indicated by the
arrows without fail.
Drain cap
Bottom side
mounting place
650 mm
(25-19/32")
Drain pipe
4-ø 12 hole
mounting place
(2) Fix securely with bolts on a solid block. (Use 4 sets of commercially
available M10 bolt, nut and washer.)
Bolt
Nut
Block
(3) Since the drain water flows out of the outdoor unit during heating
operation, install the drain pipe and connect it to a commercial 16 mm
(5/8") hose. (Reverse cycle model only)
(4) When installing the drain pipe, plug all the holes other than the drain
pipe mounting hole in the bottom of the outdoor unit with putty so
there is no water leakage. (Reverse cycle model only)
CAUTION
When the outdoor temperature is 32 °F 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)
Drain pipe mounting hole
Base
Drain pipe
2

CONNECTING THE PIPE

CAUTION
Do not use mineral oil on flared part. Prevent mineral
1
oil from getting into the system as this would reduce
the lifetime of the units.
2 While welding the pipes, be sure to blow dry nitrogen
gas through them.
The maximum lengths of this product are shown in the
3
table. If the units are further apart than this, correct
operation can not be guaranteed.
1. FLARING
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that cuttings will not enter the pipe and
remove the burrs.
(3) Insert the flare nut (always use the flare nut attached to the indoor
and outdoor units respectively) onto the pipe and perform the flare
processing with a flare tool.
Use the special R410A flare tool, or the conventional flare tool.
Check if [L] is flared uniformly
and is not cracked or scratched.
Die
A
Pipe
Dimension A
Pipe outside diameter
Flare tool for R410A, clutch type
6.35 mm (1/4 in.)
9.52 mm (3/8 in.) 0 to 0.5 mm
12.70 mm (1/2 in.) (0 to 0.0197 in.)
15.88 mm (5/8 in.)
Pipe outside diameter 0
Dimension B
-0.4
6.35 mm (1/4 in.) 9.1 mm (0.3583 in.)
9.52 mm (3/8 in.) 13.2 mm (0.5197 in.)
12.70 mm (1/2 in.) 16.6 mm (0.6536 in.)
15.88 mm (5/8 in.) 19.7 mm (0.7756 in.)
When using conventional flare tools to flare R410A pipes, the dimension
A should be approximately 0.5 mm (1/32") more than indicated in the
table (for flaring with R410A flare tools) to achieve the specified flaring.
Use a thickness gauge to measure the dimension A.
Width across flats Pipe outside Width across flats
diameter of Flare nut
6.35 mm (1/4 in.) 17 mm (0.6693 in.)
9.52 mm (3/8 in.) 22 mm (0.8661 in.)
12.70 mm (1/2 in.) 26 mm (1.0236 in.)
15.88 mm (5/8 in.) 29 mm (1.1417 in.)
B