Panasonic WH-ADC0916G9E8, Service Manual, Page: 84 / 205

84
Wire Connection and thermo characteristic of Siemen RAA20:
Setting L/Y1 (H) Heat Thermo L/Y2 (C) Cool Thermo
Set Temp < Actual Temp Open Circuit OFF Short Circuit ON
Set Temp > Actual Temp Short Circuit ON Open Circuit OFF
Control Content:

External room thermostat control activate only when remote thermostat connection select YES by Indoor control
panel.

When indoor running heat mode, refer thermo On/Off from heating line feedback. And when indoor running cool
mode, refer thermo On/Off from cooling line feedback.

Heat pump Off immediately when receive thermo off feedback.
12.17 Three Ways Valve Control
Purpose:
- 3 ways valve is used to change flow direction of hot water from heat pump between heating side and tank side.
Control contents:
1 3 ways valve switch Off:
o
During 3 ways valve switch Off time, the hot water will provide heat capacity to heating side.
2 3 ways valve switch On:
o
During 3 ways valve switch On time, the hot water will provide heat capacity to tank side.
3 Stop condition:
o
During stop mode, 3 ways valve will be in switch off position.
* During pump down and force mode, fix 3 ways valve in close condition.
* Recommended Parts : SFA 21/18 (Siemens)
Cooling
Heating
Siemen RAA20
Connect only heating line for heating only model. And connect both
heating and cooling line for heat + cool model.
Indoor Unit
6 L (label)
7
8
9
Y1 (label)
Y2 (label)
9 : Terminal Board No.
L
N2
Indoor Unit
N1
Spring Return 2 point SPDT 3 wire
3
5
M
L
1
N1
3
N2
COM
Open
Close
5
6: Terminal Board No.
M
L
NC
1
N1
3
N2
5
M
L
NO
1
N1
3
N2
5
1
AC230V