What is the danger of operating the furnace above the Maximum Supply Air Temperature?
Operating the furnace above the Maximum Supply Air Temperature can cause premature heat exchanger failure, high levels of Carbon Monoxide, a fire hazard, personal injury, property damage, and/or death.
How can I adjust the fan control settings on the furnace?
The fan-off timing can be adjusted by positioning the jumper on two of the four pins as shown in Figure 42 on the furnace.
What are the readings needed to determine furnace temperature rise?
After about 5 minutes of operation, determine the furnace temperature rise by taking readings of both the return air and the heated air in the ducts, about six feet from the furnace where they will not be affected by radiant heat.
