I'm looking for a method of converting a three port mid position valve to a 3 port divertor (2 position) valve by changing the wiring connections. I've been told it can be done, but can't find anything that says how. Anyone help please? Thanks.
convert wiring to 3 position divertor
- Thread starter tech749
- Start date
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Connect the HW OFF to the WC that supplies both the grey wire and the white wire terminal?. The valve will/should be in HW position when this grey wire has 0 Volts and should motor to the heating side when power is on the HW OFF?
Edit, think that should be the WHITE wire, Heating, to both those terminals, when deenergised valve will return to HW only position.
Edit, think that should be the WHITE wire, Heating, to both those terminals, when deenergised valve will return to HW only position.
Last edited:
Hi, thanks for reply, not sure what WC is - wiring connector? My wiring is as follows, not sure I understand quite what you mean - connect white and grey together and connect to HW OFF?
HW OFF is connected to the grey (240v when off, 0v when on), CH ON (240v when on, open cct when off) is connected to white.
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I thought I had this figured out but now not so sure now but think about this...
Link terminal5 to terminal7, below ..... suppose no HW or CH programmed, and valve in its spring return(ed) position. CH now programmed on but roonstat not calling, valve will remain in its spring returned position, CH now calls for heat, valve will move fully across to CH only required, boiler+circpump now start via orange wire which will remain on until roomstatr satisfied but valve will remain in CH position. If HW programmed on and cylinder stat calling for heat then valve will return to spring returned position with boiler+circpump on. If both programmed on and both stats calling for heat then unfortunately looks like CH will take priority? you might be able to figure something out from this, only thing to remember is that the valve only goes to mid position when there is power on the white wire only, (in normal operation).
Link terminal5 to terminal7, below ..... suppose no HW or CH programmed, and valve in its spring return(ed) position. CH now programmed on but roonstat not calling, valve will remain in its spring returned position, CH now calls for heat, valve will move fully across to CH only required, boiler+circpump now start via orange wire which will remain on until roomstatr satisfied but valve will remain in CH position. If HW programmed on and cylinder stat calling for heat then valve will return to spring returned position with boiler+circpump on. If both programmed on and both stats calling for heat then unfortunately looks like CH will take priority? you might be able to figure something out from this, only thing to remember is that the valve only goes to mid position when there is power on the white wire only, (in normal operation).
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