Panasonic U-72MF2U9 Technical Data Manual page 80

8. Optional Parts
8-4-6-5. 2 ports to be used in parallel
● 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
1
● Use 1 Relay kit on indoor unit.
● Pass the control line between 2 ports on Multiple type solenoid valve kit.
2
Power line
Power supply
3
8-4-6-6. Connection with Distribution Joint
Multiple type solenoid valve kit before the distribution joint is disapproved
4
● 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.
5
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). (
● No height difference between indoor units.
6
● Relay kit may be connected to either one of the indoor unit.
Outdoor
7
8
9
Multiple type
solenoid valve kit
Distribution joint
Indoor
Multiple type
solenoid valve kit
control line
3way PCB
3way PCB
control line
3way PCB
control line
3way PCB
Multiple type
solenoid valve kit
within 98ft (30m)
a
b
Distribution joint
Relay kit Indoor unit
To other
indoor unit
Indoor
Same type
Same capacity
Same height
Indoor
2 - 64
Design of 3WAY VRF SYSTEM
Power supply
(a-b) ≤ 16ft (5m) )