Drain Piping - Hitachi UTOPIA IVX PREMIUM Serie Bedienungsanleitung

DRAIN PIPING

8.6 REFRIGERANT CHARGING QUANTITY
Outdoor Units has been charged with refrigerant for 30m
of actual piping length. An additional refrigerant charged 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.
!
C A U T I O N
• When charging refrigerant accurately measure refrigerant to be
charged.
• Overcharging or undercharging of refrigerant can cause compressor
trouble
• In case of actual piping length less than 5 m, consult your distributor.
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:
IVX Premium series
Refrigerant charge before
Model
shipment (W
RAS-12HNP 6.7
IVX Standard series
Outdoor Refrigerant charge before
unit shipment (W
RAS-12HNC 6.7
!
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.
12 PMML0397B rev.0 - 11/2015 - P5416650
Maximum additional
(kg)) charge (kg)
0
12.1
Maximum additional
(kg)) charge (kg)
0
12.1
Applicable Model
RAS-12HN(P/C)
Additional refrigerant charge calculation method
The additional refrigerant charge for RAS-12HN(P/C) units
must be calculated by multiplying the total piping length of each
diameter per its calculation factor according to the following
table. The result of the sum is the additional refrigerant charge
for liquid piping subtracting 2.0 kg
Pipe size (mm) Additional refrigerant charge factor (kg/m)
Ø12.7
Ø9.52
Ø6.35
?
N O T E
When the unit is combined with indoor units RPI-(8/10)HP, an additional
refrigerant charge is required (W
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
?
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.
Drain pipe
Drain pipe
Extruded portion
Drain Boss
x 0.12
x 0.065
x 0.065
) = 1 kg/unit. F
2
Pipe Length ≥ 30m
Drain hole
of Base
Rubber cap