3. Installation of outdoor unit
49
_ Heat pump
60Hz/R410A
Part 3 Design and installation
3. Installation of outdoor unit
3.6.2 Air guide work
In case of out door unit is located outdoor cabin of apart-
ment or flats, then the efficiency can drop and system
pressure increases thus finally damaging the compressor
or other components in the system by heat short circuit.
<Without air guide>
Safety dorice activation
<With air guide>
Normal operation
[Example]
3.6.3 Lightning safety zone
1) To protect outdoor unit from lightning, it should be placed
within lightning safety zone.
Safety zone
2) Power cable and communication cable should be 1.5m
away from lightning rod.
3) High resistance grounded system should be performed
against induced lightning or indirect stroke.
4) If the building has no lightning protection, outdoor may be
damage from lightning. This should be informed to cus-
tomer or building owner in advance.
Building Height [m] 20 30 45 60
Protection Angle [˚] 55 45 35 25
Ground
Safe zone
Lightning rod
Protection Angle (25˚~55˚)
1.5m
1.5m
1.5m
Lightning rod
h
Regarding the safety
from atmosphere
electricity, follow the
local or national reg-
ulations
300(11 13/16)
or more
2000(78-3/4) or more
300(11 13/16)
or more
500(19-11/16)
or more
L
H
1000(39-3/8) or more
1000(39-3/8)
or more
500(19-11/16) or less
600(23-19/32) or more
1000(39-3/8) or more
300(11 13/16)
or more
n
Where the obstacles on the discharge side is lower than the unit:
• No obstacle above
4) Series installation
• Obstacle above, too
‘L’ should be lower than ‘H’.
Close the bottom of the installation frame to prevent the
discharged air from being bypassed.
[Unit:mm(inch)]