Performed furnace start up; started by inspecting and clearing out drain lines, I then went through ensuring electrical connections were tight, I then performed a gas leak search, also I checked gas pressures and did make an adjustment for fist stage dropping it to 1.9, I then went through and checked pvc exhaust and intake pipes ensuring all connections were glued, lastly performed a combustion test found no CO in the air stream. This system is currently operating normal at this time job complete