Daikin REQ-BW1, Руководство по установке

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Installation manual
5
REQ71+10 REQ71~125B7W1B
Split System air conditioners
4PW19495-1B
Refrigerant pipe size
Pair system (See figure 2)
Allowable pipe length and height difference
See the table below concerning lengths and heights. Refer to
figure 2 .
The minimal piping length should be 5 m. If installation is performed
with less field piping, the system will be overcharged (abnormal HP,
etc.). If the distance between indoor and outdoor unit is less than
5 m, please make sure that the piping length is
≥
5 m by additional
bending of the pipes.
P
RECAUTIONS ON REFRIGERANT PIPING
■
Do not allow anything other than the designated refrigerant to
get mixed into the freezing cycle, such as air, etc. If any
refrigerant gas leaks while working on the unit, ventilate the
room thoroughly right away.
■
Use R-410A only when adding refrigerant
Installation tools:
Make sure to use installation tools (gauge manifold charge hose,
etc.) that are exclusively used for R-410A installations to
withstand the pressure and to prevent foreign materials (e.g.
mineral oils and moisture) from mixing into the system.
Vacuum pump:
Use a 2-stage vacuum pump with a non-return valve
Make sure the pump oil does not flow oppositely into the system
while the pump is not working.
Use a vacuum pump which can evacuate to –100.7 kPa (5 Torr,
–755 mm Hg).
■
In order to prevent dirt, liquid or dust from entering the piping,
cure the piping with a pinch or taping.
Great caution is needed when passing copper tubes through
walls.
■
When using existing refrigerant piping
Pay attention to the following points when using existing
refrigerant piping
■
In the following situations, the existing piping should not be
re-used and new piping should be installed.
- If the previously used model had problems with its
compressor (this might cause oxidized coolant oil, scale
residue and other adverse effects).
- If the indoor or outdoor units were disconnected from the
piping for a long period of time (water or dirt might have
gotten into the piping).
- If copper piping is corroded.
■
Flares should not be re-used but rather new ones made in
order to prevent leaks.
■
Check welded connections for gas leaks, if the local piping
has welded connections.
■
Replace deteriorated insulation with new material.
R
EFRIGERANT PIPING
■
Field pipes can be installed in four directions.
Figure - Field pipes in four directions
■
Cutting out the two slits makes it possible to install as shown in
the
figure "Field pipes in four directions" .
(Use a metal saw to cut out the slits.)
■
To install the connecting pipe to the unit in a downward
direction, make a knockout hole by penetrating the center area
around the knockout hole using a
Ø
6 mm drill. (See figure "Field
pipes in four directions" .)
■
After knocking out the knock-out, it is recommended to apply
repair paint to the edge and the surrounding end surfaces to
prevent rusting.
Refrigerant pipe size
Gas pipe
Class Standard size Size-up Liquid pipe
71, 100, 125 Ø15.9 Ø19.1 Ø9.5
Allowable pipe length
Maximum allowable piping length (Parenthesized
figure represents equivalent length)
L1 50 m (70 m)
Maximum height between indoor and outdoor H1 30 m
Chargeless length L1
≤
7.5 m
Place Installation period Protection method
Outdoor unit
More than a month Pinch the pipe
Less than a month
Pinch or tape the
pipe
Indoor
Regardless of the
period
1 Drill
2 Center area around knockout hole
3 Knockout hole
4 Slit
5 Connecting pipe
6 Bottom frame
7 Front plate
8 Pipe outlet plate
9 Screw front plate
10 Pipe outlet plate screw
A Forward
B Backward
C Sideways
D Downward
4 4
3 2 1
7 8
9
10
A
D
C
B
5 6