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S PLAN DIAGRAM ... confusing and wrongly drawn?

Just connect it as I said.

The stat switches with temperature, cold = close circuit, hot = open circuit.
 
How can the programmer power (HW on) make the switch SUCK back to the 1 terminal of the cylinder stat?!!
Your use of suck makes me think you are confused as to how the switch is operated. It is mechanical switch which is closed by a cam on the motor shaft. When power is applied to the brown wire from the thermostat, the motor runs, turning the shaft and the cam on the shaft closes the switch, connecting terminal C to terminal 1. It does not matter which wire is connected to which terminal - the important thing is to use the C and 1 terminals.
 

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