INSTALLATION AND OPERATION INSTRUCTIONS
5-10
SFC BOILER / WATER HEATERS - SFC 199
POSSIBLE CAUSES ANALYSIS POSSIBLE SOLUTION
Central heating pressure is too low. → Yes
↓No
Top off the central heating system until the central heating
pressure is between 14.5 and 29 psi (1 and 2 bar).
The ue is blocked.
→ Yes Check the ue.
5.4.6 Burner ignites loudly
POSSIBLE CAUSES ANALYSIS SOLUTION
Inlet pressure is too high. → Yes
↓No
The home pressure regulator may be defective. In that
case, contact the energy company.
Ignition distance is incorrect. → Yes
↓No
Replace the ignitor including the ignition cable.
Gas-air control is not correctly
adjusted.
→ Yes Check and/or replace the ignition cable.
Replace the ignition unit in the top cover.
Replace the ignitor.
5.4.7 Burner resonates
POSSIBLE CAUSES ANALYSIS SOLUTION
Gas inlet pressure lower than 5“ w.c.
or sometimes disappears.
→ Yes
↓No
The home pressure regulator may be defective. Contact
the energy company.
There is recirculation of ue gases. → Yes
↓No
Check the ue and air supply duct.
Gas-air control is not correctly adjusted. → Yes
↓No
Check the adjustment
Burner seal is defective. → Yes
↓No
Replace the burner seal.
Burner is defective. → Yes Replace the burner.
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