10
IM 685-1
Combustion Tests
These tests should be run when the furnace is at normal oper-
ating temperature (after the furnace has been running 10 to 15
minutes), and should be run at several firing rates including
maximum and minimum.
a. Check input: See Verify Input Rate
b. Check C0
2
: See Check CO
2
, CO & Stack Temperature
c. Check CO: See Check CO
2
, CO & Stack Temperature
Cycle the Unit
Cycle the unit through several start-ups with the temperature
controls calling for first minimum rates and finally maxi-
mum rates. Be alert for any hints of trouble or unexplained
inconsistencies that could indicate future problems.
Record Data
After the gas burner has been successfully started up, checked
out and is operating correctly, readings should be taken and
recorded for future reference (see Table 6). If problems
develop in the future, variations in these readings will indi-
cate what has changed and where to start looking for prob
Figure 6a. Typical Electrical Schematic with RM7895A
Summary of Contents for SuperMod IM-685-1
Page 27: ...IM 685 1 27 Notes ...
