Hi All,
I am trying to figure out the correct wiring for a Horstmann wireless thermostat that I have been too chicken to attempt for over a year now!
I have mapped the wiring in my junction box and attach a wiring diagram. Forgive the schoolboy approach with graphics, I have no knowledge of how to correctly create an electrical wiring diagram.
I also took the front off the control unit (Drayton LP722) and noted the connections as Neutral and Live in N & L as expected, Green/Yellow in 1 (HW Off), Grey in 3 (HW On) and Black in 4 (CH On). These are indicated on the diagram alongside the control unit picture.
The wireless thermostat receiver has L, N, SL on and SL Off. It suggests in the installation guide that SL off is not normally used. So, working from the diagram, I assume I need to attach Live and Neutral between the receiver and connector block at 7 and 2 respectively.
Where then should I connect the SL on? If using three core and earth with yellow for example, does the current black wire from the LP722 (CH on) become obsolete, with the new thermostat controlling it instead via the yellow? Or does the current black remain in place and get joined by the SL on from the thermostat? Confused obviously!
Many thanks for any help.
I am trying to figure out the correct wiring for a Horstmann wireless thermostat that I have been too chicken to attempt for over a year now!
I have mapped the wiring in my junction box and attach a wiring diagram. Forgive the schoolboy approach with graphics, I have no knowledge of how to correctly create an electrical wiring diagram.
I also took the front off the control unit (Drayton LP722) and noted the connections as Neutral and Live in N & L as expected, Green/Yellow in 1 (HW Off), Grey in 3 (HW On) and Black in 4 (CH On). These are indicated on the diagram alongside the control unit picture.
The wireless thermostat receiver has L, N, SL on and SL Off. It suggests in the installation guide that SL off is not normally used. So, working from the diagram, I assume I need to attach Live and Neutral between the receiver and connector block at 7 and 2 respectively.
Where then should I connect the SL on? If using three core and earth with yellow for example, does the current black wire from the LP722 (CH on) become obsolete, with the new thermostat controlling it instead via the yellow? Or does the current black remain in place and get joined by the SL on from the thermostat? Confused obviously!
Many thanks for any help.