Hitachi UTOPIA IVX Serie Manual De Instrucciones página 29

DrAIn PIPInG
8.6 REFRIGERANT CHARGING QUANTITY
outdoor Units has been charged with refrigerant for 30m of
actual piping length. An additional refrigerant charge is required
in systems with actual piping length longer than 30m.
1 Determine an additional refrigerant quantity according to the
following procedure, and charge it into the system.
2 record the additional refrigerant quantity to facilitate service
activities thereafter.
8.6.1 Refrigerant charge before shipment
(W (kg))
0
W is the outdoor unit refrigerant charge before shipment
0
explained before, and it's shown in the following table:
Refrigerant
charge before
Outdoor unit
shipment
(W (kg))
0
rAS-4HVnC1e 3.2
rAS-5HVnC1e 3.2
rAS-6HVnC1e 3.2
rAS-4HnC1e 3.2
rAS-5HnC1e 3.2
rAS-6HnC1e 3.2
!
C A U T I O N
• When charging refrigerant, measure the amount precisely.
• Overloading or underloading of refrigerant may cause compressor
problems.
• If the actual piping length is less than 5 m consult your dealer.
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.
Model
DBS-26

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.
• 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.
13 PMML0395B rev.3 - 05/2019
Additional Maximum
refrigerant additional
charge charge
(g/m)(P) (kg)
40 1.6
60 2.7
60 2.7
40 1.6
60 2.7
60 2.7
Applicable Model
All units
Additional refrigerant charge calculation method
for all UToPIA units rAS-(4-6)H(V)nC1e use the following
formula: W = (L-30) x P
1
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
Drain pipe
Drain pipe
extruded portion
Drain boss
Pipe length ≥ 30m
Drain hole
of base
rubber cap