Installation And Operating Instructions - Smith 88 Installation And Operation Instructions Manual

Problem
Burner(s) Burning with Yellow Flame
Gas Spillage from
Draft Hood Relief Opening
Main Gas Valve Opens
But No Gas Flows
Water Hammer On Start-Up

INSTALLATION AND OPERATING INSTRUCTIONS

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