AERCO Esteem O&M Manual - Manual (Page 80)

74
GF-125
Soft Lockout Error Codes The boiler will display Soft Lockouts with a flashing “9”, then “b” as the first digit on the left of the display followed by a
steady two digit
code. Boiler will automatically reset a Soft Lockout once the condition has been corrected and unit has been returned to standa
rd oper-
ating condition.
b 18
High Temperature Limit, Boiler Supply, If the primary boiler sup- ply water temperature exceeds 200ºF, the burn- er shuts down until the supply temperature drops below 200ºF. Circulator continues operating.
Occurs if heat load demand is less than the low input-firing rate.
•
Verify the boiler and heating system are filled with water and LWCO is operating properly.
•
Ensure the boiler and system have been properly purged & there is no trapped air.
•
Inspect heating system piping and components. Ensure piping is per the recommenda- tions given in the installation instructions or other approved design configuration.
•
Ensure system and/or zone circulators are operating properly
•
Use a device to measure the supply water temperature leaving the boiler. Compare the measured temperature with the display temperature (See page 52.) •
Replace supply temperature sensor if temperature comparison is off by more than 10
ºF.
b 19
High Temperature Limit, Boiler Return If primary boiler return water temperature exceeds 200ºF, the burn- er shuts down until the return temperature drops below 200ºF. Circulator continues operating.
•
Verify the boiler and heating system are filled with water and LWCO is operating properly.
•
Ensure boiler and heating system have been properly purged and there is no trapped air.
•
Inspect heating system piping and its components. Ensure piping is per recommendations in the installation instructions or other approved design configuration
•
Ensure the boiler piping is correct and water flow is not reversed nor pipes cross connected.
•
Use a device to measure the return water temperature entering the boiler. Compare this measured temperature with the display temperature (See page 52.) •
Replace return temperature sensor if temperature comparison is off by more than 10
ºF.
b 24
High Temperature Limit, Boiler Supply and Return If the primary boiler return water temperature exceeds the boiler supply temperature, the burner will shut down until the boiler return temperature drops below the boiler supply temperature. The boiler circulator will con- tinue operating.
•
Check the following: •
Boiler and heating system are filled with water and the LWCO is operating properly.
•
Boiler and heating system have been properly purged and there is no trapped air.
•
Inspect heating system piping and its components. Ensure piping is per the recommenda- tions given in the installation instructions or other approved design configuration
•
Boiler piping is correct and the water flow is not reversed nor pipes cross connected.
•
Use a device to measure the supply water temperature leaving the boiler. Compare mea- sured temperature with the temperature •
Replace supply temperature sensor if temperature comparison is off by more than 10
ºF.
•
Use a device to measure the return water temperature entering the boiler. Compare this measured temperature with the temperature displayed at controller (See page 52.) •
Replace return temperature sensor if the temperatures are off by more than 10
ºF.