The Gen II thermostat is not at all like the gen I. Unfortunately, there are a number of ways to get it wrong. (BTW, the air release valve is part of the housing, not the thermostat, on gen II.)
http://deneau.info/ls/s6x~us~en~file=s6x33007.htm~gen~ref.htm
So is it easy to improperly install the thermostat while using the deneau link? Or did you link that to prevent an improper install? Thanks again Joe