Combination Of Face-To-Face And Side-By-Side Installations; System Installation Restrictions; Piping Length Restrictions; Installation Height Restrictions - Mitsubishi Electric QAHV-N560YA-HPB Installation & Operation Manual

(3) Combination of face-to-face and side-by-side installations

When there are walls in the front and rear of
the block of units
Ⓐ
h2'
500
Required minimum distance [mm]
L2 (Right)
300 + h2
Ⓐ Leave open in two directions.

[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

• Installation height restrictions

• 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
Heat
pump
unit
L2
L4
Ⓐ
L2'
L2' (Left) L4 (Between)
300 + h2' 1000
Storage
tank
When there are two walls in an L-shape
h2
500
L3
L2 (Right)
300 + h2
ℓ
/min): 70 kPa
• 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.
Storage
tank
9
h3
Unit height
Ⓐ
Required minimum distance [mm]
L3 (Right/Left) L4 (Between)
1000 + h3
Unit inlet water pressure < 0.5 MPa
Heat
pump
unit
h2
500
L2
Ⓐ
L4
1000