I'm more confused than ever! My heating system is a gas fired boiler that gravity feeds hot water (not steam) to the radiators. It appears that the CT50A is for gas or oil only - according to the manual.
I am also quite unsure about the anticipator. As I mentioned before, I had read it should be at 8 for a gravity fed hot-water system. You seemed to confirm in a previous post that this was correct. I have only a single metal arm called the anticipator.
I think I'm going crazy and the Honeywell manuals that you linked are useless. Just when I get to the information I need, part of the page is missing! When I go to the boiler, the thermostat is hooked to a little metal box on top of the boiler and it is absolutely plain with no markings except the Honeywell name.
I know this is not straightforward for many reasons. The man who owned the house before me was from Germany and worked in a shipyard. You would not believe this system (or the house for that matter). Its 100 years old, straight grain, first growth fir, re-inforced with concrete and steel. The heating system is really old and obviously home-made but it does work beautifully if I can just get a grip on this thermostat. The boiler (one of two remaining in Vancouver) is actually a feature of the house (men are in awe) but I have been told that you need to be a member of the boiler makers union to run this system. :>)
I am now like a dog with a bone and I won't give up. At this point, I am tempted to buy a new (old style) round thermostat exactly like the one I replaced. At least I know that it is made for a hot water system and I can read the temperature in degrees.
Now I know why the old owner said, "If it isn't broken, don't fix it"! I should have known better.