Refrigerant Piping; Piping Connection; Drain Piping - Hitachi RCD-1.0FSN Manual De Instalación

3. REFRIGERANT PIPING

3.1. PIPING CONNECTION

3.1.1. PIPING POSITION
Position of piping connection is the following, which is available from all directions, top, left or right.
3.1.2. SIZE OF PIPING CONNECTION
In case of R407C
Model RCD 1.0/1.5
Gas Piping 12.7 15.88
Liquid Piping 6.35
In case of R410A
Model RCD 1.0/1.5
Gas Piping 12.7 15.88
Liquid Piping 6.35
Special instructions for R410A
As R410 pressure is about 1.4 times higher than R407C,
improper installation may cause a serious trouble.
It is necessary to use the copper pipes, size of flare pipe
ends and flare nuts as shown below.
Thickness of Copper Pipes
Nominal Outer
Diameters Diameters
1/4 6.35
3/8 9.53
1/2 12.70
5/8 15.88

4. DRAIN PIPING

4.1. GENERAL
CAUTION:
Do not create an upper-slope or rise for the drain
-
piping, since drain water will flow back to the unit and
leakage to the room will occur when the unit
operation is stopped.
Incorrect: Upward Slope
Incorrect: Rising Part
Do not connect the drain pipe with sanitary or sewage
-
piping or any other drainage piping.
When the common drain piping is connected with
-
other indoor units, the connected position of each
indoor unit must be higher than the common piping.
(mm)
2.0 2.5/3.0 4.0/5.0
15.88 19.05
6.35 9.53 9.53
(mm)
2.0 2.5/3.0 4.0/5.0
15.88 15.88
6.35 9.53 9.53
(mm)
R407C R410A
0.80 0.80
0.80 0.80
0.80 0.80
1.00 1.00
INCORRECT
REFRIGERANT PIPING
Flare Pipe Dimensions
Nominal
Diameters Diameters
1/4
3/8
1/2
5/8
Flare Nut Dimensions
Nominal
Diameters Diameters
1/4
3/8
1/2
5/8
The pipe size of the common drain pipe must be large
-
enough according to the unit size and number of unit.
1/25~1/100 Down Slope
CORRECT
Common Drain Piping
Drain piping will require insulating if the drain is
-
installed in a location where condensation forming on
the outside of drain pipe may drop and cause
damage. The insulation for the drain pipe must be
selected to insure vapor sealing and prevent
condensation forming.
3
5
(mm)
A
Outer
+0/-0.4
R407C R410A
6.35 9.0 9.1
9.53 13.0 13.2
12.70 16.2 16.6
15.88 19.4 19.7
(mm)
B
Outer
R407C R410A
6.35 17 17
9.53 22 22
12.70 24 26
15.88 27/29 29
Drain Piping connection