EngA ENGINEERED AIR base - Page 32

base A
32
IOM74 November 2020 R105
83 Open Air Proving
Combustion blower does not exceed 3000 rpm during purge.
84
Shorted Air
Proving
Combustion rpm speed sensor has a value greater than 500
rpm for
60 seconds
before the combustion blower has been commanded on.
85
Plugged
Condensate
Blocked condensate sensor reads less then 7kΩ for more than 5 minutes.
86 High Limit
High limit safety tripped due to excessively high temperature.
87
Flame Relay
Wiring
Received a gas valve feedback within 500ms of activating the flame relay
output.
88 Flame Failure
Gas valve feedback has no power after 1 minute of enabling the Flame relay
output.
89 Blocked Flue
Blocked flue sensor tripped.
90 60 Hz
Combustion blower frequency has exceeded 60 Hz
(3590
RPM)
DG Alarms
80 Gas Valve Wiring
Gas valve feedback has power before the FR and SR contact are energized.
81
Gas Valve out of
range
Gas valve actuator feedback is greater or less
than
the demand. Tolerances
and timing depending vary on mode of operation.
82
Air Actuator Out
of range
Air Actuator Feedback Is greater or less
than
the demand. Tolerances and
timing vary depending on mode of operation.
83
Open CB Air
Proving
Combustion blower air switch input has no power for 60 seconds after
commanding the combustion blower on / Combustion blower air switch input
has no power for 2 seconds during main flame
84
Shorted CB Air
Proving
Combustion blower air switch input has power for 10 seconds before the
combustion blower has been commanded on.
85
Plugged
Condensate
Blocked condensate sensor reads less than 7kohms for
more than 5 minutes.
86 High Limit
High limit safety tripped due to excessively high temperature.
87
Flame Relay
Wiring
Received a gas valve feedback within 500ms of activating the Flame relay
output.
88 Flame Failure
Gas valve feedback has no
power after 1 minute of enabling the Flame relay
output.
89 Blocked Flue
Blocked flue input has been enabled for 1 minute or more.