Hitachi RPK-0.8FSNH2M - Refrigerant Piping; Piping Connection

REFRIGERANT PIPING
3
7
3. REFRIGERANT PIPING
3.1. PIPING CONNECTION
NOTE: RPK-(1.0-1.5)FSNH2M (models to mount the
expansion valve outside units).
1. Installation of optional expansion valve kit is
required when installing refrigerant piping. See also
the ‘Installation and Operation Manual' of the
expansion valve kit for then installation work,
connecting pipe size, additional refrigerant charge
volume and the number of connectable units.
2. The temperature of the liquid pipe between the
expansion valve kit and indoor unit decreases
lower the standard models; additional insulation
work may be required depending on the
environment.
3.1.1. PIPING POSITION
Position of piping connection is the following, which is
available from all directions, top, left or right.
RPK-(1.0-1.5)FSNH2M, (models to mount the expansion
valve outside units) may generate refrigerant circulation
noise; take out the pipe from the right rear side whenever
possible, instead of the left rear side.
Q Gas Piping Position
Model RPK-(0.8-4.0)FSN2M
(mm)
HP
Outer
diameter
a
b
c
d
(0.8-1.5)
12.7
410
108
302
195
2.0
15.88
440
150
290
240
(2.5-4.0)
15.88
654
141
513
297
Model RPK-(1.0-1.5)FSNH2M
(mm)
HP
Outer
diameter
a
b
c
d
(1.0-1.5)
12.7
410
108
302
195
Q Liquid Piping Position
Model RPK-(0.8-4.0)FSN2M
(mm)
HP
Outer
diameter
e
f
g
h
(0.8-1.5)
6.35
480
108
372
125
2.0
6.35
470
150
320
210
(2.5-4.0)
9.53
572
141
431
379
Model RPK-(1.0-1.5)FSNH2M
(mm)
HP
Outer
diameter
a
b
c
d
(1.0-1.5)
9.53
480
108
372
125
 CAUTION:
- Do not twist the pipe and hold the base well when
bending the tube.
- Only for RPK-2.0 HP
In the case that gas piping diameter is Ø12.7, remove the
union attached to the unit.
Q Right, Left and Rear Side Position
1. Right Side Piping
Cut the corner using a plastic cutter as shown
below and remove sharp edges completely.
2. Left Piping
Cut the corner at the left side using a plastic cutter
same as the right side piping (*1).
(*1) RPK-(1.0-1.5)FSNH2M, (models to mount the
expansion valve outside units) may generate refrigerant
circulation noise; take out the pipe from the right rear side
whenever possible, instead of the left rear side.
Right Side
Cover
Plastic Cutter
Cut this corner
Left Side
Cover
Right
Side
Cover
Insulation
Refrigerant pipe
(gas)
For left side
piping
Contour of unit
For right side piping
For rear side piping
Insulation
Refrigerant pipe
(liquid)
For left side
piping
Contour of unit
For right side piping
For rear side piping
Union
(Remove)