Panasonic WH-MHF09G3E8, Service Manual

Page: 73 / 140

73
12.16 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.
L
N2
Indoor Unit
N1
Spring Return 2 point SPDT 3 wire
5
4
M
L
6
N1
5
N2
COM
Open
Close
4
6: Terminal Bord No.
M
L
NC
6
N1
5
N2
4
M
L
NO
6
N1
5
N2
4
6
AC230V
* During pump down and force mode, fix 3 ways valve in close condition.
* Recommended Parts : SFA 21/18 (Siemens)
12.17 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:
a.
During stop mode, fix 2 ways valve in close condition.
L
N2
Indoor Unit
N1
Spring Return 2 point SPDT 3 wire
2
1
M
L
3
N1
2
N2
COM
Open
Close
1
3: Terminal Bord No.
M
L
NC
3
N1
2
N2
1
M
L
NO
3
N1
2
N2
1
3
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)