Our current standard controller is

SR868c8-en.pdf.

Other, older controllers include:

SR868C6_English-S[1]

SR868C3E-1

Our current east/west  controller is

SR618C6-En E-W

Other, older e/w controllers include:

SR618C1English E-W

If a backup heater in excess of 1.5 kW is to be used we recommend using a  

SR 801 Switching Unit