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Service space: Outdoor unit
7
Suction side
In the illustrations below, the service space at the suction side is based on 35°C DB and cooling operation. Foresee
more space in the following cases:
▪ When the suction side temperature regularly exceeds this temperature.
▪ When the heat load of the outdoor units is expected to regularly exceed the maximum operating capacity.
Discharge side
Take refrigerant piping work into account when positioning the units. If your layout does not match with any of the
layouts below, contact your dealer.
Single unit (
) | Single row of units (
Multiple rows of units (
Stacked units (max. 2 levels) (
See figure 1 on the inside of the front cover.
(1)
For better serviceability, use a distance ≥250 mm
A,B,C,D
Obstacles (walls/baffle plates)
E
Obstacle (roof)
a,b,c,d,e
Minimum service space between the unit and obstacles A, B, C, D and E
e
Maximum distance between the unit and the edge of obstacle E, in the direction of obstacle B
B
e
Maximum distance between the unit and the edge of obstacle E, in the direction of obstacle D
D
H
Height of the unit
U
H
,H
Height of obstacles B and D
B
D
1
Seal the bottom of the installation frame to prevent discharged air from flowing back to the suction side through the bottom of the unit.
2
Maximum two units can be installed.
Not allowed
See figure 2 on the inside of the front cover.
(1)
For better serviceability, use a distance ≥250 mm
See figure 3 on the inside of the front cover.
(1)
For better serviceability, use a distance ≥250 mm
A1=>A2
(A1) If there is danger of drainage dripping and freezing between the upper and lower units...
(A2) Then install a roof between the upper and lower units. Install the upper unit high enough above the lower unit to prevent ice buildup at the
upper unit's bottom plate.
B1=>B2
(B1) If there is no danger of drainage dripping and freezing between the upper and lower units...
(B2) Then it is not required to install a roof, but seal the gap between the upper and lower units to prevent discharged air from flowing back to the
suction side through the bottom of the unit.
7.1
Piping diagram: Outdoor unit
T
L
T
S
Liquid Pipe
1/2''
A
Suction Pipe
7/8''
B
Service port (with 5/16" flare)
3/8"&5/8"
Stop valve
Filter
PCB cooling
Muffler
)
)
)
T
B
T
M
HPS
T
D
Electronic expansion valve
4‑way valve
High pressure switch
LPS
Low pressure switch
Compressor accumulator
Heat exchanger
Compressor
Distributor
Accumulator
Thermistor
A
Field piping (liquid: Ø12.7 flare connection)
B
Field piping (gas: Ø22.2 flare connection)
Heating
Cooling
32
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