Drain Piping - Hitachi UTOPIA IVX PREMIUM Serie Manual De Instrucciones

DRAIN PIPING

Additional refrigerant charge calculation method
!
C A U T I O N
• When charging refrigerant, measure the amount precisely.
• Overloading or underloading of refrigerant may cause compressor failure.
• If the actual piping length is less than 5 m consult your dealer.
1 For all UTOPIA units RAS-(3-6)H(V)NP(1)E and RAS-4H(V)
RNS3E use the following formula:
W
1
2 For UTOPIA units RAS-(8-10)HNPE and RAS-(8-10)HNCE
The additional refrigerant charge for RAS-(8-10)HNPE and
RAS-(8-10)HNCE units must be calculated by multiplying the
total piping length of each diameter per its calculation factor
according to the following table. The result is the additional
refrigerant charge subtracting 1.6 for 8 HP or 2.0 for 10 HP. (Fill
the table with the values)
Pipe size (mm)
Ø15.88
Ø12.7
Ø9.52
Ø6.35
(*) For RAS-8HNPE and RAS-10HNPE, add 0.030 kg/m (instead of 0.065
kg/m) when there are 5 or more indoor units connected to the outdoor
unit.
?
N O T E
When the outdoor unit is combined with RPI-(8/10)HP indoor units, an
additional refrigerant charge is necessary (W2)= 1kg/unit.
9 DRAIN PIPING
9.1 DRAIN DISCHARGING BOSS
When the base of the outdoor unit is temporarily utilized as a
drain receiver and the drain water in it is discharged, this drain
boss is utilized to connect the drain piping.
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Connecting procedure
1 Insert the rubber cap into the drain boss up to the extruded
portions.
2 Insert the boss into the unit base and turn approximately 40
degree counterclockwise.
3 Size of the drain boss is 32 mm (O.D.).
4 A drain pipe should be field-supplied.
?
N O T E
Do not use this drain boss set in a cold area, because the drain water
may freeze.
13 PMML0393B rev.1 - 02/2016
= (L-30) x P
Additional refrigerant charge
factor (kg/m)
x 0.19
x 0.12
x 0.065
x 0.065(*)
3 For units RAS-(3-10)XH(V)NP1E check the technical
information of DX-Interface series 2.
Setting of Pipe Length DSW
DSW2 setting will be required only when the refrigerant pipe
length is shorter than 5 m or longer than 30 m. Pipe length
setting shall be performed as shown below.
(The  side in the table below shows the DSW location)
DSW2 on Outdoor PCB1
Factory setting Pipe Length ≤ 5m
Model
DBS-26
This drain boss is not sufficient to collect all the drain water. If collecting
drain water is completely required, provide a drain-pan that is bigger than
the unit base and install it under the unit with drainage.
Drain pipe
Drain pipe
Extruded portion
Drain Boss
Pipe Length ≥ 30m
Applicable Model
All units
Drain hole
of Base
Rubber cap