25
INSTALLATION AND OPERATING INSTRUCTIONS
Problem Possible Cause Suggested Remedy
Air Adjustment Screws Turned in Too Far Adjust Screws Out
Low Gas Pressure in Manifold Adjust Main Gas Pressure Regulator
(Insufficient Air Injection) or Check Line Pressure
Burner Ports Partially Closed
Replace Burners or Clean Ports
Burner(s) Burning with Yellow Flame
(Rust, Dirt, Lint, etc)
Check Size of Combustion Air Openings
to Room
Insufficient Air for Combustion
If Undersized, Correct as Required
Check for Negative Pressure in Boiler Room
Oversized Burner Orifice Install Correct Orifice
High Gas Pressure in Manifold Adjust Main Gas Pressure Regulator
Insufficient Draft - Chimney Too Low Increase Height or Add Induced Draft Fan
Insufficient Draft - Chimney Too Small Replace Chimney or Add Induced Draft Fan
Insufficient Draft - Blockage in Chimney or Vent Repair Chimney or Vent
Gas Spillage from Insufficient Draft - Downdraft Caused by
Draft Hood Relief Opening
Chimney Location with Respect to Other Install Chimney Cap
Buildings, Roofs, etc.
Negative Pressure in Boiler Room Remove Exhaust Fan or
(Due to Exhaust Fan or Duct System) Isolate Fan From Boiler Room
Insufficient Combustion Air Openings
Provide Correctly Sized Combustion and
Ventilation Air Openings
Main Gas Valve Opens
Manual Valve Closed at Gas Train Open Valve
But No Gas Flows
Manual Valve Closed at Meter Open Valve
Test Firing Valve Closed (if Provided) Open Valve
Sags in Steam Piping or not enough Pitch Correct Piping Condition
Concentric reducers causing condensate pooling Correct Piping
Drip trap failed closed Replace Trap or Trap Element
Dry returns wetted due to new boiler water line
Correct Piping or Install Feed System and Traps
higher than old boiler
No drip line on the back side of a back-pitched
Install Drip Line and Trap
motorized valve
Water Hammer On Start-Up
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