Just replaced my coleman evcon furnace gas valve (robertshaw) with a universal replacement white rodgers this cvcalve electrical has 3 terminal ports an the old only had 2 iI am not getting trhe bunner to fire as it seem that no gas is being supplied to the bunner by the valve .What I am asking is what is the proper wireing for this valve I have 3 wires to connect one runs from a 24 v0lt source on mod.labeled GRND. One says valve an other says RS on the valve I have 3 terms 1 says TH another TH/TR and last one says TR what goes where?? In the meant time I am going to try to clean the flame sensor