Honeywell S9360A Manual page 18

S9360A, S9361A, S9380A, S9381A INTEGRATED BOILER CONTROLLERS
66-1203—05
APPEARANCE
SMALL BLUE FLAME
LAZY YELLOW FLAME
WAVING BLUE FLAME
NOISY LIFTING
BLOWING FLAME
HARD SHARP FLAME
Fig. 12. Examples of unsatisfactory pilot flames.
CAUSE
CHECK FOR LACK OF GAS FROM:
• CLOGGED ORIFICE FILTER
• CLOGGED PILOT FILTER
• LOW GAS SUPPLY PRESSURE
• PILOT ADJUSTMENT AT MINIMUM
CHECK FOR LACK OF AIR FROM:
• DIRTY ORIFICE
• DIRTY LINT SCREEN, IF USED
• DIRTY PRIMARY AIR OPENING,
IF THERE IS ONE
• PILOT ADJUSTMENT AT MINIMUM
CHECK FOR:
• EXCESSIVE DRAFT AT PILOT
LOCATION
• RECIRCULATING PRODUCTS
OF COMBUSTION
CHECK FOR:
• HIGH GAS PRESSURE
THIS FLAME IS CHARACTERISTIC
OF MANUFACTURED GAS
CHECK FOR:
• HIGH GAS PRESSURE
• ORIFICE TOO SMALL
M3272A
18