Features Of 3Way Vrf System; Combination Of Outdoor Units - Panasonic U-72MF2U9 Technical Data Manual

2. Features of 3WAY VRF SYSTEM

2. Features of 3WAY VRF SYSTEM
2-1. Outline of 3WAY VRF SYSTEM
System example
* The capacity after the setting
CONNECTION
must not exceed 30-Ton.
If indoor/outdoor units need servicing, a ball
valve (field supply) cuts off non-operational
units to let other units stay running.
System limitations
Max. No. allowable connected outdoor units
Max. capacity allowable connected outdoor units
Max. connectable indoor units
Max. allowable indoor/outdoor capacity ratio
Maximum actual piping length
Maximum level difference (when outdoor unit is lower)
Maximum total piping length

Combination of outdoor units

The DC inverter unit can be used independently or in combination.
R407C models and R22 models must not be used in combination with each other.
Total tonnage
6
Type (Ton)
1
6
8
10
12
Maximum number of connectable indoor units when connected with minimum capacity
Total system Number of
tonnage indoor units
6 14
8 19
10 24
12 28
3 *
2
360,000 BTU/h
(30-Ton, 105.5 kW)
52 *
3
50~150%
656 ft
164(131) ft
,
1 640 ft
8 10 12 14 16
1
1
1 1
1
1
1
Total system Number of
tonnage indoor units
14 33
16 38
18 43
20 48
22~30 52
CONCENTRATION
*If the additional installment of outdoor and indoor units are expected,
the size of refrigerant piping should be decided according to the total capacity
after the addition.
*1 The connection between the indoor unit(s) and the solenoid valve kit(s) has
three (3) types of methods. For further details, see the section 2.
3-4. "Connecting Multiple Indoor Units to a Single Solenoid Valve Kit".
*2 Up to 3 units can be connected if the system has been extended.
*3 In the case of 20-Ton (type 240) or smaller units, the number is limited by
the total capacity of the connected indoor units.
18 20 22 24 26
1
1
1 2 1 2
1 2
1 - 5
Outline of 3WAY VRF SYSTEM
Outline of 3WAY VRF SYSTEM
Since all pipings are
concentrated into
one pipe shaft, you
can minimize piping
space and construc-
tion labor.
Solenoid
valve kit
Indoor unit
ADDITION
If your indoor capacity load
changes in the future, it's easy to
add on both indoor and outdoor
units using the same pipings.
28 30
1
2 3
1
*1
2
3
4
5
6
7
8
9