55
Read ue gas temperature on User
Interface.
Is temperature higher than 200°F ?
YES
NO
Boiler is over red. Wait
for boiler to cool. Fix
ow rate problem if any,
purging all air out of the
system.
Replace Flue Gas Sensor
Replace Control Module
Use thermal couple to measure ue
gas temperature through sampling
port. Is the measured temperature
and ue temperature reading on User
Interface signicantly different?
YES
NO
Blocking Error
Flue Gas Error
13 - TROUBLE SHOOTING
E
39
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