Indoor Unit Piping Work Connection; Way Cassette Type; Rpc - Ceiling Type - Hitachi FSG1 Series Technical Catalogue

REFRIGERANT PIPING AND REFRIGERANT CHARGE
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13.4. INDOOR UNIT PIPING WORK CONNECTION

13.4.1. RCI – 4 WAY CASSETTE TYPE
Position of piping connection is the following, which is
available from all directions, top, left or right.
Piping size
¡ ¡ ¡ ¡
Gas Piping
RCI-1.0/1.5 Ø 12.7 (1/2)
RCI-2.0
Ø 15.88 (5/8)
RCI-2.5/3.0
RCI-4.0/5.0 Ø 19.05 (3/4)
13.4.2. RCD – 2 WAY CASSETTE TYPE
Piping size
¡ ¡ ¡ ¡
Gas Piping
RCD-1.0/1.5 Ø 12.7 (1/2)
RCD-2.0
Ø 15.88 (5/8)
RCD-2.5/3.0
RCD-4.0/5.0 Ø 19.05 (3/4)
13.4.3. RPC – CEILING TYPE
n
¢ ¢ ¢ ¢
Liquid Piping
Ø 6.35 (1/4)
Piping size
Æ 9.53 (3/8)
RPC-2.0
RPC-2.5/3.0
RPC-4.0/5.0
n
¢ ¢ ¢ ¢
Liquid Piping
Ø 6.35 (1/4)
Æ 9.53 (3/8)
Piping Position
The refrigerant piping can be connected to some one of
two directions of the indoor unit: upper or rear side, when
facing the unit.
– The positions of piping are shown below
– Each direction has the prepared knockout hole as
shown in piping work sub-chapter.
– Cut the knockout hole for the required direction.
Liquid piping
Gas Piping
Gas Piping
Æ 15,88 (5/8)
Æ 19.05 (3/4)
Piping Work Installation
Piping work should be performed from the bottom side of
the unit. Remove the air inlet grille before beginning the
piping work, according to the following steps:
1. Slide the Knobs to the rear side.

Slide
Knob
2. Open the air inlet grille, push up and slide the air inlet
grilles to the rear side.
Unit
‚
Open
Air Inlet Grille
Drain Piping
Liquid Piping
Æ 6.35 (1/4)
Æ 9.53 (3/8)
Rear Side
ƒ
Push