Three Ways Valve Control; Two Ways Valve Control - Panasonic WH-MHF12G9E8 Service Manual

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:
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)

12.17 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:
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
6
L
6
L
5
N1
5
N1 4
N2
4
N2
NO
6
L
5
N1
4
N2
Spring Return 2 point
NC
3
L
3
L
2
N1
2
N1
1
N2
1
N2
NO
3
L
2
N1
1
N2
M
M
M
M
73
SPDT 3 wire
COM
6
L
Open
5
N1
Close
4
N2
6: Terminal Bord No.
SPDT 3 wire
COM
3
L
Open
2
N1
Close
1
N2
3: Terminal Bord No.
M
M