Two Ways Valve Control; External Off/On Control - Panasonic WH-UD05JE5 Service Manual

14.23 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)

14.24 External OFF/ON Control


Communication circuit between indoor unit and external controller is as per below.

Maximum length of communication cable is 50 meter.

Control content:
External Control Switch
ON
ON
OFF
OFF
Spring Return 2 point
NC
1
L
1
L
3
N1
3
5
N1
N2
5
N2
NO
1
L
3
N1
5
N2
5V
12V
mico
1
2
Panasonic
PCB
Control Panel OFF/ON
ON
OFF
ON
OFF
157
SPDT 3 wire
1
L
M
3
N1
5
N2
3: Terminal Board No.
M
External
Controller
CN-THERMO
Control Panel Power LED
ON
OFF
ON
OFF
COM
M
Open
Close
System Status
ON
OFF
OFF
OFF