Panasonic U-120MF2U9, Technical Data Manual, Page: 80 / 181

Design of 3WAY VRF SYSTEM
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8. Optional Parts
8-4-6-5. 2 ports to be used in parallel
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2 ports to be used in parallel for the unit 24-48 type
Use 856 type, 656 type and 456 type Multiple type solenoid valve kit.
Use distribution joint to unite 2 outlet ports to 1 port.
Outdoor
Indoor Indoor Indoor
Multiple type
solenoid valve kit
Distribution joint
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Use 1 Relay kit on indoor unit.
Pass the control line between 2 ports on Multiple type solenoid valve kit.
Power supply
3way PCB
3way PCB
3way PCB
3way PCB
Relay kit Indoor unit Power supply
Power line
control line
control line
control line
To other
indoor unit
Multiple type
solenoid valve kit
8-4-6-6. Connection with Distribution Joint
Multiple type solenoid valve kit before the distribution joint is disapproved
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Use distribution joint to divide 1 outlet port to 2 ports. (T-joint is not allowed.)
Indoor unit type shall be the same.
Ex.) 4way + 4way = OK, Wall +Wall = OK, but, 4way + Wall = N/A.
Capacity of each indoor unit shall be the same, and the total indoor unit capacity under 1 port shall not exceed
than allowable max capacity of the port.
Ex.) In case of 656 type box, allowable max capacity of the port is 19,100BTU/h (5.6 kW) or less.
9,500BTU/h+9,500BTU/h (2.8kW+2.8kW) = OK
12,200BTU/h+12,200BTU/h (3.6kW+3.6kW) = N/A
12,200BTU/h+7,500BTU/h (3.6kW+2.2kW) = N/A
Tubing length from Multiple type solenoid valve kit to each indoor unit shall be within 98ft (30 m).
Difference of tubing length between 2 distribution joints shall be within 16ft (5m). ( (a-b) ≤ 16ft (5m) )
No height difference between indoor units.
Relay kit may be connected to either one of the indoor unit.
Outdoor
Multiple type
solenoid valve kit
Indoor
Indoor
within 98ft (30m)
Distribution joint
b
a
Same type
Same capacity
Same height
TD831183-00_北米向け3WAY.indb 64 15/12/17 16:05:28