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12.18 Two Ways Valve Control
Functionality of 2 ways valve:
î 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.
* During pump down mode, fix 2 ways valve in close condition.
* During force mode, open 2 ways valve.
* Recommended Parts : SFA 21/18 (Siemens)