Flue gas analysis on the existing boilers shows combustion efficiency ranging from xxx to xxx, which is below the operating capability.
The boilers could benefit from a tune-up by a qualified heating mechanic. This simple activity will increase operating efficient by about xxx%.
A tune-up will increase capacity, improve reliability, and extend the life of boiler and water heaters.
Depending on the boiler design, the following actions should be taken:
|1.||Clean the fire side of the heat exchanger.|
|2.||De-scale the water side of the heat exchanger.|
|3.||Clean the burners.|
|4.||For atmospheric boilers, check and adjust the gas pressure in the manifold.|
|5.||For forced draft boilers, adjust the air and gas flow rates for all firing stages or across the firing range for modulating burners.|
Issues and Concerns
Boiler service requires a qualified tradesperson, however owner staff can perform regular visual inspections. Watch for the following warning conditions:
|•||A soft, lazy yellow flame.|
|•||A hard blue flame.|
|•||Dirty or sooty heat exchanger surfaces.|
|•||Broken heat exchanger (big flame area rather than individual holes) on atmospheric boilers. This looks a lot like a broken burner on a gas barbecue.|
|•||Damaged combustion chamber walls.|
|•||Backdrafting (combustion products coming into the boiler room rather than leaving through the stack).|
|•||Flame roll-out from the burner to the exterior of the boiler cabinetry.|
|•||Condensation in boiler or vent (visible either as dripping or as corrosion and streaks around the joints.|
Conforms to recommendations in "Energy and Water Efficiency in Multi-Unit Residential Buildings", Canada Mortgage and Housing Corp.