Advertisement
Available languages
Available languages
PIPING WORK AND REFRIGERANT CHARGE
8.3.2 Accessories factory-supplied with FSXNPE units
accessory
Accessory Pipe
For Fixing Power
Cord Clamp
Source Wire
For Power Source Wire
Outlet (Bottom Base,
Piping Cover)
For Transmission Wire
Rubber Bush
Outlet (Bottom Base,
Piping Cover)
For Control Wire Outlet
(Bottom Base, Piping
Cover)
Screw
Combination Unit
For Indication of
Model Label
Combination Unit Model
Protection plastic film
?
n o t e
Please contact your HITACHI distributor if any of the accessories has not been supplied with the unit.
8.3.3 Precautions for the installation of the outdoor unit
Order of installation of the units
When the installation and piping work for the multiple outdoor
units are performed, it is required that the arrangement for
outdoor units and piping length be determined. Perform securely
the installation work according to the following restrictions. If
the arrangement for outdoor units is incorrect, it may cause
flowback of the refrigerant and result in failure of outdoor unit.
Piping outlet
direction
Indoor
unit side
Piping
connection kit 1
18
PMML0479 rev.4 - 11/2018
5HP
6HP
ID22.2
ID22.2
ID22.2
→OD15.88
→OD19.05
ID22.2
ID22.2
ID22.2
→OD12.7
→OD15.88
×2
×2
×2
×2
×2
×2
×3
×3
>
>
A
B
Outdoor
Outdoor
Outdoor
unit
unit
A
B
Piping
connection kit 2
L
b
(*)
L
(*)
a
(*): Keep the straight-line distance of 500 mm or more for piping after the piping connection kit.
8HP
10HP
12HP
ID22.2
ID22.2
→OD19.05
→OD19.05
→OD25.4
-
OD9.52
→OD15.88
→OD12.7
×2
×2
×2
×2
×2
×2
×2
×2
×2
×3
×3
×3
Restrictions for 2 and 3 Units Combination
1 For 2 and 3 outdoor units combination, align the outdoor
units from largest capacity to smallest as A > B > C
and outdoor unit "A" should be connected to the piping
connection kit 1.
2 The piping length between the piping connection kit 1 and
the outdoor unit should be La < Lb < Lc < 10m.
3 For maintenance, attach "Main unit label" to the service
cover (back side surface) of the outdoor unit "A".
<
<
B
C
C
Outdoor
Outdoor
unit
unit
unit
C
C
B
(*)
Piping con-
nection kit 2
L
b
L
L
c
c
14HP
16HP
18HP
ID22.2
OD15.88
ID22.2
→OD28.58
→OD12.7
→OD28.58
-
ID22.2
→OD28.58
×2
×2
×2
×2
×2
×2
×3
×3
A
Outdoor
unit
A
Piping outlet
direction
(*)
Indoor
unit side
L
a
Piping
connection kit 1
remarks
-
-
-
-
Ø70
×2
Ø62
×2
Ø38
×2
for Fixing
Cord Clamp
×3
and Spare
Attach to
Outdoor Unit
A (Main Unit)
Advertisement
