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Outdoor unit positioned on top and indoor unit on the bottom
In this case, traps (6) must be installed on the suction piping (3), every three
meters of difference in level. These traps will allow the oil to return to the
compressor. The connection piping must be insulated.
Key:
1. Outdoor unit
2. Indoor unit
3. Piping on gas side (larger diameter)
4. Piping on liquid side
5. Condensation drain pipe
6. Trap
Note: The maximum difference in level between the indoor unit and outdoor unit
must not exceed the values given in the
HEIGHT DIFFERENCE OF REFRIGERANT
LIMITS TO THE LENGTH AND HEIGHT DIFFERENCE OF REFRIGERANT PIPES
The length of the refrigerant pipes between the indoor and outdoor units must be as short as possible and is in any
case limited by compliance with the maximum height difference values between the units.
Diminution of the difference in height between the units (H1,H2) and the pipe lengths (L) will limit the load losses, con-
sequently increasing the overall efficiency of the machine.
Comply with the limits given in the following tables.
R410A HEAT PUMP
SPECIFICATIONS
DIAMETER
MAXIMUM LENGTH
Outdoor unit low (H1)
MAXIMUM
DIFF.IN HEIGHT
Outdoor unit high (H2)
Maximum pipe length with standard charge
Type of refrigerant
Quantity of additional refrigerant per meter
Contact our technical department for the required modifications if the units must operate beyond the specifi-
cations given above.
MACHINE INSTALLATION
"LIMITS TO THE LENGTH AND
PIPES" section.
MODEL
UM
"
LIQUIDO
"
GAS
m
m
m
m
g
g/m
9000
12000
1/4
1/4
3/8
3/8
15
5
5
4
R410A
20
18000
1/4
1/2
20
25
5
10
5
10
4
5
20
20
Fig.4
11
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