PB Heat 211A manual Troubleshooting Service Tips, Problem Possible Cause Suggested Remedy

TROUBLESHOOTING – SERVICE TIPS

13. TROUBLESHOOTING – SERVICE TIPS

Problem	Possible Cause	Suggested Remedy
	Defective Thermocouple	Replace
	Heavy Draft Blowing across Pilot	Redirect Air Movement or Eliminate
	Plugged Pilot Orifice	Replace Orifice
Pilot Outage		Check Manual Pilot Valve
	No Gas	Check Main Gas Shut-Off Valve
		Check Manual Meter Valve
		Consult Gas Company
	Defective Thermopilot Valve	Replace
	Defective Ignition Control	Replace
	No Power	Check Power Source with Meter
		Check Fuses
	Defective Gas Valve	Replace
	Defective Thermocouple	Replace
	Low Water Level in Boiler	Check for Leaks
Main Gas Valve Will Not Open	or System Causing Low Water Cut-off to Function	Check Feeder (if Supplied)
(Standard Spark-Ignited Pilot System)
	Defective Thermopilot Valve	Replace
	Defective Ignition Control	Replace
	High Gas Pressure Switch Open	Check Switch Setting
	(if Provided)	Check Manifold Gas Pressure
	Low Gas Pressure Switch Open	Check Switch Setting
	(if Provided)	Check Manifold Gas Pressure
	No Power	Check Power Source with Meter
		Check Fuses
	Defective Gas Valve	Replace
	Relay Locked Out on Safety	Check for Pilot Outage
	Pilot Out	Relight Pilot
		(May have defective pilot valve or relay)
Main Gas Valve Will Not Open	Defective Relay	Replace
(Electronic Standing Pilot System)	Low Water in Boiler	Check for Leaks
	or System Causing Low Water Cut-off to Function	Check Feeder (if Supplied)
	Defective Thermopilot Valve(s)	Replace
	Defective Thermocouple(s)	Replace
	High Gas Pressure Switch Open	Check Switch Setting
	(if Provided)	Check Manifold Gas Pressure
	Low Gas Pressure Switch Open	Check Switch Setting
	(if Provided)	Check Inlet Gas Pressure
	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 (Rust, Dirt, Lint, etc.)	Replace Burners or Clean Ports
Burner(s) Burning with Yellow Flame		Check Size of Combustion Air Openings to
	Insufficient Air for Combustion	Room, 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
Gas Spillage from	Insufficient Draft – Blockage in Chimney or Vent	Repair Chimney or Vent
	Insufficient Draft – Downdraft Caused by
Draft Hood Relief Opening
	Chimney Location with Respect to	Install Chimney Cap
	Other Buildings, Roofs, etc.
	Negative Pressure in Boiler Room	Remove Exhaust Fan
	(Due to Exhaust Fan or Duct System)	or Isolate Fan From Boiler Room
	Insufficient Combustion Air Openings	Provide Correctly Sized Combustion and
		Ventilation Air Openings

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