Three Ways Valve Control; Two Ways Valve Control - Panasonic WH-SDC09H3E8 Service Manual

12.21 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:
During 3 ways valve switch Off time, the hot water will provide heat capacity to heating side.
o
2 3 ways valve switch On:
During 3 ways valve switch On time, the hot water will provide heat capacity to tank side.
o
3 Stop condition:
During stop mode, 3 ways valve will be in switch off position.
o
Indoor Unit
AC230V
* During pump down and force mode, fix 3 ways valve in close condition.
* Recommended Parts : SFA 21/18 (Siemens)

12.22 Two Ways Valve Control

Functionality of 2 ways valve:

Use to allow hot water to floor heating panel or block cold water to floor heating panel.
Control contents:
1 When indoor running in heat mode, OPEN the 2 ways valve.
2 When indoor running in cool mode, CLOSE the 2 ways valve.
3 Stop condition:
During stop mode, fix 2 ways valve in close condition.
a.
Indoor Unit
AC230V
* During pump down mode, fix 2 ways valve in close condition.
* During force mode, open 2 ways valve.
* Recommended Parts : SFA 21/18 (Siemens)
Spring Return 2 point
NC
L
L
N1
N1
N2
N2
NO
L
N1
N2
Spring Return 2 point
NC
L
L
N1
N1
N2
N2
NO
L
N1
N2
132
SPDT 3 wire
L
M
N1
N2
M
SPDT 3 wire
L
M
N1
N2
M
COM
M
Open
Close
COM
M
Open
Close