9
(3) Combination of face-to-face and side-by-side installations
[3] System installation restrictions
• Piping length restrictions
The maximum piping length is 60 m.
Select appropriate diameter pipes to prevent negative pressure from the pumping head and the pressure loss in the
pipes.
Pumping head (when maximum flow rate is 17
ℓ
/min): 70 kPa
• Installation height restrictions
When there are walls in the front and rear of
the block of units
h2
h2’
L2’
L4
L2
Ⓐ
Ⓐ
500
500
Required minimum distance [mm]
L2 (Right)
L2’ (Left)
L4 (Between)
300 + h2
300 + h2’
1000
Ⓐ
Leave open in two directions.
When there are two walls in an L-shape
h2
h3
L2
L4
L3
Ⓐ
Ⓐ
Unit height
500
Required minimum distance [mm]
L2 (Right)
L3 (Right/Left)
L4 (Between)
300 + h2
1000 + h3
1000
• When the unit is installed above the storage
tank
Decide the height so that the unit inlet water
pressure will not be negative for the tank
pressure.
Unit inlet water pressure > 0 MPa
Storage
tank
Heat
pump
unit
• When the unit is installed below the storage
tank
Decide the height so that the unit inlet water
pressure will be 0.5 MPa or below for the tank
pressure.
Heat
pump
unit
Storage
tank
Unit inlet water pressure < 0.5 MPa
WT08219X05.book 9 ページ 2018年10月1日 月曜日 午後7時47分
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