Panasonic U-72MF2U9 Technical Data Manual page 40

3. Electrical Wiring
3. ELECTRICAL WIRING
3. ELECTRICAL WIRING
3-4. Connecting Multiple Indoor Units to a Single Solenoid Valve Kit
It is possible to connect multiple indoor units to one solenoid valve kit.
The indoor units can be controlled individually or be operated as a group.
It is possible to adopt multiple units with a common use of the solenoid valve kit per piece of refrigerant.
Categories of connected indoor unit capacities are determined by the solenoid valve kit.
Type of solenoid valve kit
CZ-P160HR2U
CZ-P56HR2U
* If the capacity range is exceeded, use two solenoid valves connected in parallel.
1
Each Method (General) and Conditions
Method
2
Connectable number
of remote controls
Possible operating
3
functions
Possible operating
modes
4
Condition
Method 1
5
Solenoid Solenoid
valve kit valve kit
Indoor unit
6
Remote
controller controller
7
8
9
19,100 BTU / h (5.6 kW) < Total capacity ≤ 54,600 BTU / h (16.0 kW)
Method 1
Connecting one indoor unit with
one solenoid valve kit
1 piece
Individual control
Cool, Dry, Heating, Auto, Fan
–
Method 1 Method 2
Solenoid Solenoid
valve kit valve kit
Indoor unit Indoor unit Indoor unit
Remote Remote
controller
Total capacity of indoor units
Total capacity ≤ 19,100 BTU / h (5.6 kW)
Method 2
Group control is possible by
connecting multiple indoor units
to one solenoid valve kit.
1 piece
Group control
* Thermostat On/Off function is
only individual control (when
selecting the body thermostat).
Cool, Dry, Heating, Auto, Fan
Mixed cooling and heating is
impossible.
Method 3
Solenoid
valve kit
Indoor unit Indoor unit Indoor unit
Remote Remote
controller controller
2 - 24
Design of 3WAY VRF SYSTEM
Method 3
Indoor units can operate
individually by connecting
multiple indoor units to one
solenoid valve kit.
Over 2 pieces
Individual control available
* Mixed group control available
Cooling, Dry, Heating, Fan
* Auto selection is impossible.
Mixed cooling and heating is
impossible.
Auto selection is impossible.
Method 3
Solenoid
valve kit
Indoor unit Indoor unit Indoor unit
Remote Remote
controller controller
Indoor unit
Remote
controller